Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203
Edition: Model Aviation - 1983/12
Page Numbers: 58, 59, 60, 61, 166, 167, 168, 169, 170, 171, 172
Nickel-cadmium batteries necessary part Electric flight systems yes weve heard few have used solar cells experimen tally Being perhaps expensive part flight system youll want know use Ni-Cds best advantage take care Part 4E Bob Kopski RH b DUtmm FEW MONTHS have gone since series began 1 wish restate point made Part will policy writer present experience-guided formation techniques other words am presenting experience-backed stuff sharing some personal practices prefer ences based thereon Surely ways to view things Electric nor offerings necessarily best way case hut thex work Thus should witness personally experi ence some different successful view point approach please write share information Though have tlying Electrics 10 years dont know everything Now lets get down sublect monthbatteries electric-powered air plane models 1 Kinds batteries few kinds rechargeable nickel-cadmium Ni Cd batteries currently use model elec tric power Historically best performing popular have made either General Electric Sanyo bat teries made up high quality cells capable accepting controlled high charge rates delivering higher dis 0 Left The same Sanyo 12 Ah cell GE end-to-end welded 55 Ah cells shown upper picture plus some wiring accessories har ness left connects battery motor end must disconnected charging harness right does same job includes separate charing jack mounts fuselage side simple charger connection comparison separate charge plug jack shown Right simplest charging setup allused Electric fliers Its commercial charger resting under auto hood together plane having its battery charged almost-free fuel costs too little notice photos author 58 Model Aviation variety batteries electric motors shows several possible configurations two having eight cells shown ends authors preferred arrangement outer tape wrapping allows cooling airflow between cells worst feels small triangular shaped pack left has six 55 Ah cells being fully-covered sealed gets very hot bottom single Sanyo 12 Ah cell alongside end-to-end GE 55 Ah pair weighs close 2 oz has same diameter Other battery packs shown picture SR Batteries Leisure Electronics Astro Flight charge currents Presently trend toward increased use Sanyo yellow-cased types Sanyo also makes red-label variety can deliver higher discharge currents have somewhat reduced capacity per given cell size Sanyo reds popular Europeans Recently SR Batteries has introduced batteries electric power cell manufacturer unknown Im process trying have much success flying both GE Sanyo yellow cells Some friends have also tried economy types wont again cells offered enticement initial lower cost longer-term experience no bargain Reduced performance higher failure rate subsequent maintenance problems simply worth up-front saving Recommendation stay proven quality products 2 Battery size power tech nically correct battery assembly cell Ni-Cd cells nomi nally 12 volts always wired series form battery Cell voltages add connected series two cells result twice voltage single cell common cell sizes capacities 550 mAh 2 Ah Nominal Ni-Cd cell volt age independent size amperehour capacity cell Also amperehour capacity battery same individual cells battery always made up same size cells ie two sizes mixed Most Electric systems sold country have used four 16 cells form battery according motor requirements present trend definitely toward use 12 Ah size cells RC models popular battery being assembly six seven cells pack easy charge 12-volt source such auto battery often used popular 05-size motors above discussions apparent batteries can vary both number cells voltage cell size ampere hour capacity Part Three last month saw examples power watts required some motors propellers power watts product voltage current amperage battery supplies power power drain battery its voltage multiplied current de manded motor/prop combination long battery can deliver power watt-hours directly determined cell size ie 'hour' part ampere-hour rating Perhaps example would help popu lar battery consists six 12 Ah cells nominal battery voltage 72 volts 6 x 12 can deliver 12 amps hour can deliver 12 amps 1/10 hour 6 mm such multiple within reason two examples battery can supply 72 volts x 12 amps x hour 864 watthours 72 volts x 12 amps x 1/10 hour again 864 watt-hours what meant Part Three said battery can deliver its fill Its little bit like getting 32 fluid ounces out quart milk bottleyou can pour slow low cur rent can pour fast high current either way still can get out its fill quart Lets get little refined real use battery voltage somewhat lower nominal value l2volts per cell cause some loss due internal cell resistance especially noticeable un December 1983 59 Simple homemade charger Dan Mitten does just about everything commercial unit does includes current meter timer switch power charge leads etc guys Electrics like own thing Authors field box has 34 Ah Deep Cycle Marine Battery power Slide-out drawer houses two timer-switches two-plane charging single current meter switchable either cir cuit Note simple plug-in charger connection plane field box also houses small note book logging flight data Rear view field box right shows multiple-output power converter charging wide variety batteries Desired voltage easily selected banana plugs Heater-element resistors control charging current Plug-in leads routed through two charge timers left picture Has given trduble-free operation over four years Heres way cool battery removing model Underneath 72-inspan J-3 fuselage auto windshield washer motor junk yard turning 3-in prop blows up through fuselage bottom air exit Astro 15 flight battery inside gets benefit two pictures above below show features simple custom field box using panel Rapid Charger made Ken Stinson coiled cable upper left pic stretches nearby car built-in blower uses auto windshield washer motor home made fan blades under charge plane rests adjustable foam rubber cradle cooling air forced up through normal bat tery air exits underside fuselage can see blower motor internal view above right few dollars invested such unit little time cooling lets get lot flying keeps motor battery cool happy picture below Kens version Spectra gets fueled up cooled off same time Forced cooling air exits through normal air intake just ahead wing der very heavy current loads imposed motors rarely under 8 amps Under such high-load conditions cell terminal voltage drops 10 11 volts Also actual ampere-hour capacity falls short rated value hecause value generally specified some comparatively low current drain Despite ampere-hour rating very good indication relative capa bility cells different sizes general experience has heen ter minal voltage averages little over 1 0 volt per cell under normal motor loads over useful run-down battery cell battery capacity usually between 85 90 percent label value about 10-amp load What have usable battery capability about 6 12 watt-hours example described above Using example above guideline can now look back Part 3 see long motor run might expect some motor/prop combination given look Table 3 youll see convenient ex ample motor turning 7 X 6 prop 8000 rpm 6 volts current drain 795 amps ie. 48-watt load exam ple above would run motor/prop about 612/48 0127 hours Thats 7/2 mm fully-charged battery Yes possible practical case will see later Simple huh make hard might reasonably ask just use current drain cell size' Sure will get close same result fact what folks cluding myself quick estimate what went through previous para graphs bit accurate will bit useful pursue Electrics beyond get-acquainted stages Remember example given Part 3 power input Astro 25 Astro 075/belt drive compared same prop prop speed Volts amps werent mentioned power watts batteries can made up different cell sizes number cells energy tanks can chosen conjunction motor/prop offer appropriate power system fly some particular plane long 25-size motor example might use fewer large cells 075-size motor smaller cells achieve same desired tlight time point discussion begins go bit beyond scope series cant go wrong understanding basics involved As will see other practical considerations dictate makeup batteries especially neophyte Electric Iliers astute reader may wondering what happened missing watt-hours between example 'label value 864 usable number 612 advised isnt missing Its therein battery heat Later youll see other heat losses well some rather surprising places 3 Battery configuration Lets take break heavier stuff look something easier As may have guessed variety possible battery configurations ie physical sizes shapes cells cylindrical can stacked end-to-end side-by-side variety com binations Often two three cells welded end-to-end long cylinder cylinders placed side-by-side Personally prefer rectangular shape over flat-pack shape although latter has some advantages case cellto-cell connections either welds sol dered wires braids Generally battery lead-outs 18-gauge like lamp cord heavier wire Some batteries come packaged neat taped-together plastic box tidy shrunkon plastic covering first things go want lots air contact over around through battery packs Remember battery heat mean tioned previously Individual cells usually have own thin insulating sleeves generally hold pack cells together plastic tape and/or few drops CyA adhe 60 Model Aviation sive insulation cells touch 4 Preferred battery charging techniques wish buck article subject since important aspects electric-powered flying cant get too much attention Often battery represents largest single cost item Electric system warrants under standing careful handling use espe cially charging return can gen erally expect hundreds good flights battery pack. think charging motors flight bat teries like filling gas tank family wheels generally buy gasoline three ways Gimme five' Fill er up up top off first way times Im hurry little short money Usually just fill er up Once Im going distance top off comes charging motor batter ies usually just fill em upalmost Lets start usual favorite method first Its conservative what call safe charge Beginning dis charged battery simply put safe num ber ampere-hours know somewhat less absolute maximum charge possible will give perfectly satisfactory flight what over 95% time two examples Suppose bat tery made up 12 Ah cells Remember number cells doesnt matter ca pacity can also expressed ampereminutes Since 60 minutes hour capacity example 12 X 60 72 Am convert minutes because popular chargers use IS-mm clock work time switches terminate charge IS-mm charge time would need charge current 72/15 48 amps achieve 'label capacity' dont charge 12 Ah batteries about 42 amps 15 mm results 42 x IS m charge 63/60 Ah Remem ber must start discharged pack safe charge normal battery very convenient accomplish especially modern chargers have current ad justment controls Yes battery will take usually dont care get very satisfactory flight method ab solutely no worry about overcharging rec ommend approach sport fliers ask opinion Come think know sport fliers 055 Ah cells used label ca pacity' 055 x 60 33 ampere minutes Label capacity' would achieved using 22 amps 15 mm charge about 9 amps provides charge about 29 ampere-minutes 29/60 048 Ah Earlier mentioned current-adjustable chargers also recommend ask current easily set control knob value reasonably maintained over charge period Actually current does drop slightly throughout duration charge can re adjusted set slightly high begin slightly lower finishing value will give proper average easier to write about charging technique dumps specific number ampere-hours battery assumption empty has Continued page 166 December 1983 61 Left John Hickeys sophisiticated field system Includes two 14 Ah motorcycle batteries series power home-brew high-efficiency switchmode electronic current pumps charge current fully adjustable highly stable Johns Spectra-Soar rests independently-powered cooler box Right looking through grillwork Hickeys cooler Three gell-cells power two old large servo motors swing cut-down nylon props John simply lays th model grill letting air forced up through fuselage bottom holes under motor battery Left Dan Gravers charging setup includes dedicated auto battery voltage booster charger Getting filled up Dans Friendly design 12 12 Ah cells older version Astro 10 Having eight cells means Dan needs auto batterys 12 volts charging Right Heinz Koerners super field facility really workshop away home Shown operations center top massive multi-drawer cabinet 115 Ah marine battery bottom Three eight-cell 12 Ah packs resting built-in blower grill Two charger panels visible plus other metering equipment voltage booster internally mounted field box Heinz prefers charge packs outside plane has interchangeable packs can get much flying washeswithout needing wait THE DEBT IN CUSTOM DESIGNS ~ASTRO HOG 20 RIC Super Stunt Training Design 54 Wingspan 25 Engines 314 size version 3-time psst Nationals winner Suitable 2 5 Channel RIO Plan N Pattern Set RCT-l @ $995 WACO SRE Cabin Biplane R/C 521/2 Wingspan 640 Sq 19 40 Engines Plan N Pattern Sets $1295 RC8S-3 4A 1 Scale 44 Long 7-K 440 Sq W 32% Span Navy F4D-1 SKYRAY Midwest Kress RK-20 Ducted Fan suggested 3-4 Channel RIG systems will fly aircraft Plan N Pattern Set RCDF1 @ $1995 otter beautifully prepared Plan Designs best Full Size Layouts Parts Drawings Bill Materials data create own replica Saves substantial amounts over full kit costs Prices br Complete Plans Sub Assembly De tailed Parts List Add $200 Mailing Tube SEND FOR BROCHURE ahead crowd New Brochure showing new designs br 1083-84 Send $100 refundable first order CLEVGIANTS GIANT SCALE BUFFS LAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS CD QUALITY MASTER MODELS PLANS 77 Loconke Sedor $25 0dFokkor 07 FIr$39 73 N Mitch So,b $4 60 Hoocord Pore Rnce $337 65 MMoroode 8-26 $42 70 R7l. Gee-Bee $327 78 Soporith Pop$24 60 Sopernorioo S6B $24 51 DO Mooqoiro Sb $38 pernrerine S68 $327 108 DO MooqoBonk $48 63 c Hocok PeE $36 61 c,rio Robin 055 $16 94 c H ock P68 Pr $547 95 510 PSI7Koydel $48 62 o h od Vogo $24 99 NSIb widon P61 $65 Poret LOS-A $28 71 DoogDc-3 Orno $29 00 e 0-B r 1 $397 95 DoogDC-3 Tron $45 nope Sporr $36 86 Cooke Seooco 13 533 Soildog 539 08 cor02L11/4 LBS $567 c-3 SpI $35 78 Acn SprPor A2 $3o 0-38 Obe $24 60 Doogloe M2 Mo $24 122 0009101 038 Ob$497 68 Brielnl Bolidna FIr $30 94 Pogee Cort Rocer 5457 59 Boco,RoceMeLA $54 71 Mo rn 810 Bonb $29 197 Oro, Boorcl 9SF $54 i~ 78 So ne 1 ww Soc $357 73 Tronol Air 6000 $24 64 Co OnebI Fl 1C2$39107 MorI MB-I Son$44 Ooehk Fl 1C2$5491 Lndkorge NO211539 66 DeHon Co,or Soc$2461 AEO GIV Lr Boor$24 62 Con MrMolligon$35108 PojrohPSlO Sr$597 94 Con Mr Molligon$45790 Woco Soporwing$39 63 Boeng p26A Fr$3675 wed6 Lyondor$32 84 Soc og P26A Fr$487ISO worId Lyonder$49 C6 Cokin $36 57 Ford Sriorrr 4-Ar 528 C17S Slog$3876 Ford Sjnrr 465$45 %cr7-S Orog$497114 Ford Sriorr 4-AT$59 11 EloOro $24 04 BeIJnyco OFJ-2 $56 82 Look 11 Elecrro 92 Looning c-2Anph "~- 630rnroo 5/W SR7$165$ OronJ2-F Dock$39 nw SR7 $24 78 OronJ2-F Dock $56 no nw SR7$3259 Onlho O1V Son$22 Fr 92-S $20 117 Onlho O1V Son $39 78S erol Fr 95-S 68 Doog 046A Oke 1188 cml Fl P2-S $457 100 Sikor 5-38 Aroph $49 %76S L Pecco Spec $45 60 Soo 100 Sport $36 63 Sky ocker 09SF-i$2090 Boo 100 Spor$49 wohk 9-40$24905rjoeALon wi,9$56 igbrog 9-30$3800 Morrin 74 04M-I$39 on-Boo An$2475 C-Pgo 0400 Sonb$35 7 jen-B AnpW$39100 8-Pgo 0400 Boor$49 ,n-f.5106990 J3 cob MChjoo Clippor 98 Lock Codon Onk$3897 MChino Clippo$69 0397 83G,or969CoIIc$287lLoncnooC-2Airlin$24 $49 08 SoWioklo Sird$45 oelI whIn,nd $24 04 Col SojIr 09934 $28 68 Ryor Nonon $39 63 Lindberg LSirioe $24 688 BornooO VOoji $39 55 CorkOjnd 9,Son 832 NO KITS AVAILABLE Price okecl o chongo iL 01n00P01VINOIOTESIfl 4TFolOElONOPlO Orb, Ocole ond Sioos 6 Spon Coorploro wIb 9oren 9on 25c Add 01 10 oIl ordo, fo chipping B joe. elc Ic USA C oS Moo BIcenboroodd 10% 120% ifby 0) jTpcoroIcoroIog$150 9,oolcrcecloOoIonOSSl *by forego odd 81 001* ~irCLEYELAND MODEL& SUPPLY Co 18387B Doereit An.CIotnd Ohio 44182 166Model Aviation regular Scale models major difference thecompetition construction within fuselagefor reason procedure posting purposes accepting mounting jet engine construction must provide proper engine cooling protection inside structure extreme heat gener ated engine accomplished two means lining inside fuselage two layers aluminum foil layer asbestos paper engine baffle-tube mounts inside finished fuselage turn surrounds engine tubes purpose direct concentrate airflow over engine cooling tube also forms rear mount engine aluminum foil asbestos paper cemented place water glass adhesive adhesive whitish power silicate sodium potassium both mtxed water forms paste used keeping aluminum foil asbestos paper place water glass powder may obtained local hardware drug stores complete fuselage construction engine installation will need make front engine mount special fuel tank air-intake opening sufficient en gine See photos details Other items will required flying model include source starting air ig nition system fuel air source can either modified hand-operated auto mobile tire pump air tank ignition system uses old Model T-type ignition coil six-volt battery coil ob tainable auto parts suppliers such JC Whitney Co fuel standard un leaded automobile gasoline hope what have presented jet models has provided some idea what jet modeling could interested obtaining complete con struction flying details plans please write Sam Abdow 246 Beattie Street Fall River MA 02723 Posting scores Under- Section 50 Para graph 3 Unified Scale Judging Regu lations AMA 1983 rule book state ment Upon completion scale judging scores will retained separate records Flight Director released en tered flight cards until entrant com pletes first flight attempts become airborne Whereupon itemized scores will posted otherwise made available Em phasis added Scale scores will pro vided models attempt flight particular section Scale rules brought attention Reuben Mac Bride Clifton NJ participant first time 1983 Nats Reubens letter praised way Scale scores posted Nats after contestant made official flight observed procedure allowed him compare per formance other contestants determine chances competition main points risk ad ditional attempts/flights Scale model unless necessary better position scores impressed Reuben local meets has participated Scale scores guarded almost point secrecy some instances until trophy time must say have agree what Reuben has stated about nonposting scores CL Scale events Northeastern states too have years participated meets individual could spite what rule book states get look own score until meet over winners nounced final thought Reuben does have way locally cant scores posted Carrier Stunt other CL event possible reasons can think post ing scores either judges Event Directors really aware scoreposting rules post scores openly order avoid possible questions controversy over particular models might have judged statically flight recommendation can make either situation contestants faced non-posting scores talk judges Event Director CD effort get situation turned around Im sure contest officials approached reasonable manner scores will get posted otherwise made available required rules posting scores meets previ ously following rule book procedures can beneficial both contestant contest management contestant will sat isfied having score posted will benefitted knowing stands times during competition con test management might benefit satisfied contestants might also re quired adequate judging job order answer questions concerning Hows Whys particular models score Good knowledgeable judges should have problems area ever some judges quite up judging chores required post scores just might forced become proficient tasks see posting scores promptly properly handled contestant con test management beneficial both resulting better-run Scale events Send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 Electrics/Kopski Continued paqe 61 room hold charge Its little like pouring full water pitcher identical empty pitcher know will fit other hand some water empty poured full anyway its paper-towel time Since bat tery almost never truly empty nearly less full charge choice Also technique allows some error under charge proper operation Specif measurement since current meters timer ically Ni-Cd cell coming up switches battery label ca- near full charge cell voltage rises pacity have some inaccuracies plus described earlier voltage rise typically minus reaches 150 155 volts per cell drops want go distance get off upon charge removal pack very out battery Ill digital eight cells battery terminal voltage charge expression bit mis- reaches 120 124 volts principle nomer because thing digital well-suited charging car batabout charging usually moni- tery tored digital voltmeter right kind operation motor battery conof expanded-scale voltmeter would just nected auto battery usually through wellthen would ESV charge simple charger current meter time Anyway purpose technique switch several feet wire Initially rapidly put maximum possible charge charge current can quite high limited battery safely blowing the resistance circuit batteries lid off Since Im competition yet involved Values greater 6 amps occasionally information typical 55 Ah packs nearly 10 amps demonstration 12 Ah ones As motor battery way method works put cur- charges voltage difference between rent cells independent time auto battery motor battery decreases monitor progress charge does charge current fact voltmeter thats capable displaying very current drop time nearly linear ie small changes battery voltage par- current diminishes about same ticular meter watched normal amount equal amounts time throughrise battery terminal voltage charge out 15-mm normal charge period progresses maximum ca- battery about half charged first five pacity reached leveling off minutes very nice want just slight drop terminal voltage observed quickie flight After about 15 point pull plug lose mm charge current usually down battery battery has topped off below amp 2 amp respectively s like auto example tank full 55 12 Ah cells gasoline would overflow may sound just nifty ground charging would result some disadvantages First motor battery rapid battery temperature rise probable must have just right number cells venting pressure release cells seven cells nine cells wont work has experience such charg- 12-volt car battery commonly used ing generally requires about 18 22 mm field fuel source course 16 cells case 12 Ah cells charged about would require two car batteries series 4-amp current Since normally take two Fewer-cell packs can charged putting planes field charge fly resistor charge circuit departs Im usually mind sit around voltage charge principle watching digits click much prefer relative simplicity safety affords peace mind reliable IS-mm clock- source battery has good work timer shape As car battery drops off toward Please dont anyone misunderstand below 12 volts does resulting Im against such full charging nor am charge quality source voltage little suggesting avoid youre in- high easy accidental overcharge can re clined equipped skilled am say- suit shouldnt charge engine ing find unnecessary fun running because car battery voltage rises flying being charged alternator occasions Im little short Actually technique offers some adof time like will too dark 10 vantages beside simplicity thing 15 minutes often partially chargesay safer charge partly-charged pack five minutes short charge will al- way because charge current autolow some extra flying time matically drops safe value another Gas guys busy cleaning up Theres noth- self-adjusts whatever size cells ing wrong undercharging Im battery technique flying arent good first described must say have years 5 Other battery charging techniques hundreds flights using voltage charging techniques discussed far very charge method have products much up date mean go right ahead use use adjustable controlled current An obvious method char motor applied discharged battery using battery classic overnight charge such three described charge philosophies commonly used RC equipment way its done nowadays few years 055 Ah cells charged about ago common technique 50-60 mA 12 Ab cells 120 mA both voltage charge method Since arc 14-16 hours has experience still plenty products around Ill also certainly does work describe approach some reason unknown resulting voltage charge technique relies terminal voltage characteristic battery performance during flight bench simply good proper rapid NOW THERES QUICK AND EASY WAY OF CLEANING YOUR MODEL CRAFTS Super-K Model Cleaner Removes fuel Residue dirt contact CUTS CLEANING TIME IN HALF Just spray model solvent wipe soft cloth paper towel SIMPLE AS THAT Leaves craft showcase clean eWont harm Paints Covedngs Odes Clear fast 0 Elmlnates Woric cleaning model Strong Professional Quality formula Great Model Craft Boats Ranes Helicopters Cleans Gently Protects delicate model DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT Hurry Have product shelves time Christmas guaranteed top seller Sugg retail $550 per gallon Contact us price structures ordering information Also ask about other SuperK products Model Industry Are Manufacturers & Major Brands DisiTibutors Model Engines Kits RadIos & Accessories Super-K brand ot kings Radio CoflIToI Hobbles InternatIonal 3960 West 16th Ave Hialeah Florida 33012 Phone 305 5572024 uumprni iui wnicn includes printwaod stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 far SH SEAG LEN MODEL CO Box 123 Plympton Ma 02367 December 1983 167 Design witS high-tech composites tsr ultimate strength weight components B pee eel already tamale MAGPIALtTE cempeslles try sample hit lededes C F 007 asd C F 014- Rigid graphite sheets C F 250 t /4 end grain Salsa grapSite laminate GB 125- 1/8 end grain balsa ana gloss laminate GB 250- 1/4 end grain balsa glass laminate Graphite Rods 075 114 diameter Brochare -Shows use composite Partial haliel sizes prices avaitable CF007n24$ 900 CF Oldbn24$1800 CF 250 Bn12$1300 Ge 12512 n 12. $ 700 Promotional G 825012 n12 . $ 050saleprice Graphite1/4a24$1800 Reds 075 n36 5 450 Milled Fibert lb$750 Glass Balloons1 gal$650 New Sample Kit$1500 Brnchure 00 VISA MASTERCARD COD CHECK DR MOBEY OfiDER Plural Rejideets Add 5% Sales Tan Add $36 Post*geb Heesdttesg Develnped LETT MODELS Sales Informatton BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 305 365-5869 charging overnight charging method Elec trics does have good result equalization cells pack Under certain conditions battery cells can come unbalanced state charge some can run down long before others Using such battery results poor flight time certainly good cells run down first since sub ject extended reverse charging others continue run condition can result example charging pack running out several days Such storage results stale charge normal self-discharge behavior cells different cell causes uneven charge state Under condi tions risky try fast-charge Re member fast charging should always start discharged pack expedient way get condition fully charge overnight safe currents mentioned takes cells fully up ready run down evenly assuming no damaged cells other note often happens first charge day results flight per formance good second charge behavior seems prevalent GE cells though dont know Such havior can measured bench well have adopted practice charging Im going fly dont put plane away charged condition thing avoids possibility forgetting recharging next time outkiss bat tery goodbye Also problem cell im balance avoided Another benefit practice also eliminates possibility motor coming full force should working plane shop between flying sessions 6 Precautions No matter what kind fastcharging method use kind flying some precautions neces sary What really gets Ni-Cd cells heat dont like wont work well hot means wont charge well wont deliver well fact both charging discharging could prove downright damaging done battery too hot charge orfly cells hot What hot think generally recog nized threshold pain people about 1400F Less can still too hot sort reference touch cell ends firm fingertip con tact cell feels like would hurt just little hotter let battery cool Actually cells pack should about same temperature An unusually hot cell compared others usually indicates problem cell Most serious Electric fliers use some sort cooling technique such small blower force air around battery plane ground Some put battery wrapped plastic refresh ment cooler easiest least mechanized technique remove pack plane let cool naturally Another good idea let get too hot first place have found except extremely hot climate air hardly cool flying almost never re sults battery hot enough cant recharge within several minutes landing think results several things preferred safe charge philosophy Another insistance generous inflight air circulation through battery Third shut off motor noticeable drop flight power indicating battery dropping off rapidly its charge exhausted latter condition what meant discharged battery dis cussions above Once noticeable drop motor performance continued run ning reverse-charges some cells - ----/ 9 / / II Whcits Free FihtOne Qclversity citter another 168 Model Aviation Tirod Being Shot Down SUPER SERVO GARD Controls Throttlo Cant * Constantly monitors receaver interference another trans mitter outside sources instantly reducing throttle idle until interference clears * Constantly monitors flight battery pack voltage instantly reduces throttle idle allowing time safely land * Responds instantly loss radio signal throttling back idle alerting flight problem * Affects throttle giving complete control other servos safe landing * Minimizes crash damage caused signal loss ending full force smashups Endorsed lMAAShow Team required show model flown SPECIFICATIONS Size KPS 1411 Servo Case Power 17 ma Volt CutOut Point 46 volts Pulse Width Range Adj 0628 milliseconds Systems 3 4 wire Temp Range 00 1400F Weight 12 oz Price $4795 Postpaid Specify connector type positive negatIve pulse orderIng RF Enterprises 106 N Main St. Arlington OH 48614 4191366-5066 get hot good battery have wait cool before recharging Generally speaking glider configuration should fly much longer motor run time gives battery plenty airflow cooling time performance plane relies motor run sustain flight will land higher-temperature bat teries Pay attention case Having number planes hangar times never go field Usually take two Fly charge works very well saves wear tear transmitter switch too just leave time times Ive run transmitter battery downthe result having Electric plane air almost continuously Being 53 MHz helps too transmitter now equipped audio battery alert battery pack Electric flight system just charge like plane 7 Battery-charging equipment acces sories variety ready-made charging equipment available equip ment easy use beginning Elec tric flier should encounter no difficulties disappointments commonly-used charger incorporates current meter singleturn 15 mm wind-up timer switch current control addition some chargers have indicator lamp shows youve made electrical connections also serves low-current charging path top off battery time switch has completed its high-current charging func tion Voltmeter jacks charger panel allow conveniently connect volt meter monitor charge conditions such digital charging least charger has built-in digital voltmeter task Another charger contains internal lineoperated power supply use work shop As best can count two leading suppliers country offer total II charger/power supplies Electric power Some chargers have fullyadjustable current control feature Instead have either fixed resistor switched resistor limited number battery charging options lowest-cost models quite workable Dont discount match power sys tem needs have limited funds Typically charger has cord clips connect auto battery Some have plug designed fit cigarette lighter socket recommend first because experience has shown cigarette lighter connection reliableand its inconvenient route power line car output side charger usually supplied mate motor battery connector battery charge jack depending manufacturer personal prefer ence use separate charge jack using motor battery connector results unnecessary wear tear contacts Besides separate charge connector very easy mount model always readily accessible course batterymating chager well-suited remove airborne battery cooling tween flights way spare l Consumers Guide RC Aircraft Products 242 Pages Photos & Descriptions over 2000 RC Aircraft Products fered 176 companies Outstanding Value Only $495 plus shipping* Send $660 Includes ups & handling Foreign orders send $786 U5 surface mail $1049 US air mail Catalogs companies would cost over 10 times price outstanding reference book product lines nearly major man ufacturer distributor importer well unique interesting products small companies seldom advertise national modeling magazines July 83 ModelAviation See Local Dealer Order Direct NAME Send check money order Censumers GuIde 150 Ott St. lbnisonburg VA 22801 December 1983 169 Hundreds New Products FOX GLOW PLUGS FOR THOSE WHO WANT THE BEST SNORT s119 LONG $119 RC SNORT $159 RC LONG Si 69 Rhodium twice expensive platinum s better glow plugs space age insulator costs glass crack use Job shops couldnt hold tolerances wanted metal parts ourselves though less 1 plug 500 fails glow FOX PLUGS THOSE WHO WANT THE BEST F OIXMFG CO 5305 TOWSON AVE FORT SMITH ARK 72901 Hel Line 15011646 1656 I. IEl UIU%Iji[ I031k I1 Sg- 0 a THIS YEARS NATS WINNERS PROVE RED MAX BEST First Place 4 out S Catagoriesl Mike Cecil 1st P11 1st Overall Jeff Hanna 1st P1 2nd yr row Rich Irvine 1st P1 J0 Wagner 1st PH Pdltro Power 0% 5% 10% 12% 15% 25% 40% 60% 0%800 5%1000 10%1100 15%1300 04 Gal Onion EA 13500 21900 31000 34000 35000 49700 69600 92300 12500 19600 28000 33000 550 650 750 925 30 Gal Onion EA 10300 15200 20600 22700 25800 30700 41800 54400 5004759500 60055013900 67565017000 85081021000 NEW 4-CYCLE FUEL OS. Saito Enya EtcBetter Idle Top End Regular Glow Fuel 1o%14009108257792050033000 NEW CLEAN BURNING DIESEL FUEL Finally Diesel Doesnt Smell Like Kerosene Emit Black Residue 160010109259002580042500 CUSTOM BLENDED FUEL Available Any Type Engine Use Call Price Red Max T-Shirts $500 White cotton pocket T-Shirt Red Max emblem Sizes S M L XL 14 years VHS Supply has InnovatIve company W ampliaalze qualty sad eaglnearlag excellemce VHS first otterS gallon cams quality model feel economIcal prices offer ecoaonuy fuel sport filers fIrst offer clean burning diesel fuel mow Ifrst otter mooney hack gUaran tee always best thIng about Rad Max tuells dont have t ae expert use ORDERING INFORMATION FREE DELIVERY 14524 126 gallon deals USA 30 & 54 gallon drums shipped freight collect FOB Clover SC Nitro content fuels can mixed ob tain quantity price SC orders add 4% sales tax Use charge card order COD s limited UPS shipment Deduct 3% prepayment Money Order Cer tified Check ordering 24 gallons please supply daytime phone num ber 24 gallons up shipped motor freight less 24 gallons shipped UPS Prices subject chanEo .thn,t flfltiCA Quality Semco Mufflers Tuned Pipe Adapter Super Expansion FAI Competition Vertical Down Exhaust Pitts Pitts Jr Super Flo Thru Exhaust Manifolds 215 457-3120 Assembly Stand Double Value Ideal caddy workbench setting checking wing stab incidence Regular$2995 1/4 Scale$3495 Balancing Posts$595 Dealer Inquiries Welcome 125 Manor Ave S emco Oaklyn NJ 08107 battery can get lot flying Since personally use separate charge jack scheme Ill offer another thought Sys tems employ charge jack part ready-made wiring harness connect jack active also-supplied miniature toggle power switch turned off other words wiring such charg ing can done harness switch off charge jack normally disconnected motor switch turned always wire charge jacks directly battery Thus jack live whether motor running allows checking battery loaded running motoreasily accom plished plugging voltmeter jack means matching charger plug available separately Electric power systems have cells can charged single car battery can charged two batteries series chargers know can ac commodate configuration havent seen product youre sure check supplier An alternative using two source batteries use voltage booster device about size charger electronically converts 12-volt input 24 volts output output powering charger permits charging normal eight-cell limit sure carefully read instruc tions charging equipment have repeatedly mentioned use car batteries power source other batteries can used motorcycle bat tery used glow engine starting satis factory source its large enough maintained good condition recommend least 12 Ah size field box equipped 34 Ah Sears Deep Cycle Marine Battery nearly heavy car battery course car source free fueL plenty commerciallyavailable equipment charging other electric functions enterprising model ers want thing field box usual outlet urge Youre no doubt familiar flight boxes glowengine flying Some examples field boxes Electrics shown pictures may variously contain transmitter charger maybe custom voltage converter booster cooling fan meters battery power assorted tools props hardware tachometer Im always amazed creativity enthusiasm first-time Electric fliers second time out sees shoe box gone deluxe field support facility its place other extreme really need charger transmitter youre flying RC 8 Battery life motor battery may costly part Electric system its worth caring Im speaking sport flier Serious competition fliers may always care too much about lon gevity being concerned chal lenge hand conservatism evident 170 Model Aviation 100% Guarantee Will Find Red Max Better Any Other Fuel Market RED MAX FUEL Best Fuel Beginners Experts 4 Gal Case OneorEGelCan24GaI121081 Gal PerGelPerGelPrGaI 1050660575535 1150780695585 1400910825779 1500970900867 16001010925900 2000140012001100 2500200018001600 3000250023002100 NEW ECONOMY FUEL Blend Castor Synthetic Lubricant Very Good Sport Fuel - / 1 DUPLICATOR MKI PAT PND Worlds First Adjustable Hand Sander Accurately sandsall edges wings stabs fuselage etc Modelers world over love Once use youll never build again Available three ways Duplicator only$1195 Standard Package$1995 contains OuptIcator Sticldback Sandpaper seven pattern Deluxe Kit$4995 contains 2 Duplicators Stickiback Sand paper 44 patterns pattern gauge 4 E-Z PAINT PAT PEND Model Aircraft PaIntIng Stand Works type model aircraft 51285 KLWN J UND 1IEXTRA HANDS PAT 3396727 Model AIrcraft Covering Jig Makes covering simple nsA B C using type material Available three ways Model 36-coverswingsto6ft- $1595 Modell8- S 895 Model 72- ft $2495 E DIGGER PAT PENDSTICKIBACK SAND PAPER lUnge Slotting ToolNot great DuplIcator EKI Makes hinge slotting breeze . $295Hand Sander super making unusual sanding tools large smalL W ELDON J UND CO2Wx70 Roll. $3A9 Los Alamitos CA 90720 213431-6750 choice technique coincides fun flying preference economy asso ciated manifestation attitude de scribed earlier have generous airflow through battery what read quite contrary European atti tude Some would argue battery never really gets chance heat up cell heating occurs cell center out ward cooling surface little value cooling can always done outside plane anyway latter part certainly true way can see validity first part very short power runsof high performance short duration batteries everyone elses Ive seen can get quite hot absence cooling have learned hard costly lesson after bad experi enceshame inadequate air care no-no Later series well look installations good air-conditioning job reminders comments made good battery care assumed motor battery can last hundreds flights Specifically have hundreds flights same pack electric-powered gliders Generally power runs two five minutes total result flight times 5 13 mm respectively neutral air no uppefs no downers kind flying plenty time airflow its cooling rarely glider batteries need additional cool-down time after flight high powerspending FAI competition-type glider may demand 25 30 amps its 12 Ah cells minute less Thats what Im yet far havent experience seeing honest hundreds glider flights motor battery perform ance does deteriorate use ob served carefully fall-off can seen shows up slowly reduced rpm re duced motor run time some cases both As result unless theres cata strophic failure cell battery life may depend what wish call itwhere want draw line Lets examine cost point view Assume call quits 200 conservative number flights six-cell pack listing $3500 per-flight fuel cost would about 175 cents above discussion referenced gli ders same basic concept holds true Electric sport planes Old-Timers like Pattern Pylon planes differ ent generally have flight times much longer useful motor run time addition flight performance sen sitive indicator power systems per formance Soon after battery perform ance begins weaken will know Outside loops wont rolls will slower seconds will begin show up depar ture normal flight times experi ence happens somewhere around 100 flights GE cells Sanyo sorry dont have number Using number 100 thats 35 cents flight course dont have quit chances planes having original hot performance will intol erable difference sport plane deteriorating performance nearly noticeable important fact can take performance planes battery use sport job wont suffer much assumption has helped someone some has helped everyone interested think fair ALL NEW CUSTOM SCINEURLE CDI G9 ENGINES Racing & Stunt versions special hard chrome ng technology Aiso Compiete inventory individuai stock custom parts Cox TD 020 049 051 & 09 engInes Cam etition parts & accessories Cambat Free Fit C/L & R/C Racing Speed Stunt & Team Race Exciusive distributor Neison 15 engine & parts detailed catalog send 50 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Telephone 714 830-5162 December 1983 171 IN STOCK FOR IMMEDIATE SHIPMENT New 30 CID QUADRA $20950 New 22 CID QUADRA $10950 Reg 22 QUADRA $10450 Brisighella Flywheel $12450 Reg 22 QUADRA POWER ASSEMBLY ONLY56450 QUADRA REPAIR 000 phis pert Jim Messer ERCOUPEPLANS $2395 KIT $23995 Jim Messer TOMAHAWKPLANS $2395 KIT $39995 Jim Messer 8-BALL TRAINER PLANS $1895 KIT $9995 BALSA BASSWOOD ejuest 35% OFF Concep$ FLEET PLANS $3995 KIT $15995 COWL $1995 FLOATS 36ilS scale cores $1795 complete kit $3995 FLOATS 45/ scale cores $2195 complete kit $4795 CECONITE Products 10% OFF Sig J3 CUB KIT $12495 PLANS SUPER STEARMAN Y Godfrey $3995 STARDUSTER TOO Brisiahellal J-3 CUB Ne$cr $2995 VOLKSPLANE Chicken Chauliel $2395 COCKPIT KITS Tomahawk F4U-1 Spitfire $2395 Ercoupe $2095 Stearman 52295 Citabria $2495 J3 Cab $2195 ME109 $2395 Fleet $2195 US Quadra FUEL TANKS16 oz $695 32 oz $795 FIBERGLASSARROWSHAFTS5I16.532.IOOB 61$1000 24-Hour Service $250 postage Send Bauk Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 valley view Dr Allegany NY 14706 RIC Capitol offers worlds finest RC custom built-up RC scale aircraft Quarter Scale PlansBa $249BPP Quarter Scale Partial KitsEs $95OOPP Quarter Scale Custom-Built DeluxBa $800OOPP Piper Pacer PA-20 89 Wingspan Piper Tn-Pacer PA-22 89 Wingspan DH85 Leopard Moth 111 Wingspan DH-80A Puss Moth 111 Wingspan Please send $100 sell-addressed stamped envelope complete list HOBBY CAPITOL RIC Est 1951 46 N Oak Si Ventura CA 93001 805 643-7616 8465 Distributors Finest Quality Built-Up RIC Aircraft Custome Built Ready-To-Fly Radio Controlled Model Airplanes OS FS 40 OS ES 60 OS ES 75 OS ES 120T. ENVA 40-40 ENYA 60-40 ENYA 90-40 SAITO3O SAITO 40-Il 5A1T045 SAITO9OT 4-STROKE ENGINE SALE COMPARE & SAVE 8950 12500 14500 34900 12950 14950 18950 8450 9950 10950 29950 TERMS Prepaid check money order lncludeS25OforUPS street address Calif residents add 6% sales tax No credit cards please Allow 2 weeks delivery REDWOOD hobby imports RO B0X6171 SANTA ROSA CALIF 95401 Subject stack hand 0 E2J Inc High performance model engine connecting rods Dealer inquiries invited connecting rods made best materials available designed give long service eliminate rod breakage modern high-Perfor mance model engines Used leading aircraft boat car racers end hobbyists Rods available foe popular modal engines Look RPM foe new innovative products proven performance records Richardson Precision Machining Inc 5070 Gotden Dr. San Jose CA 9612914081257-7068 tell series being guided large extent much on-field experience fellow fliers problems questions persons have called written questions have read various magazines Since biggest con cerns over what may have unin tentionally missed inadequately covered innocently confused again invite say Bob Kopski 25 West End Dr Lans dale PA 19446 Now really import address SEAM Society Electric Aircraft Modelers national organization dedicated ad vancement electric-powered model fly ing SEAM newsletter contains much information about things Electricnews views how-tos Membership mere 10 bucks under 16 Junior $5 Write SEAM 11632 Flamingo Dr Garden Grove CA 92644 course AMA mem bership required Profile Bearcat/Williams Continued paqe 76 qualifying flight Wednesday condi tions Stunt fliers dread thing elseabsolute dead calm jig tubes including leading trailing edge sheeting center section sheeting landing gear installation installation bellcrank leadouts After wing construc tion complete tubes carefully re moved tip blocks added balsa use must 4 6-lb range trailing edge spar cut -in sheet table saw radial arm saw trailing edge sheeting purposefully over hangs back spar sandpapercovered dowel used achieve con cave shape trailing edge produces somewhat tighter aero dynamically cleaner hinge line nor mally attained counterlever hinges noted plans key making setup work correctly flaps made -in sheet center rotation flaps center flap leading edge diameter same technique used stabilizer elevator flap horn simply bent proper shape conform dihedral trailing edge sweep know seems motion arms will too unplane useful works out-of-plane motion taken up brass tubes inset flaps tube Vt id flattened over flap horn arm oval shape flap assembled usually fill tube aquarium sealer fule-proofer aquarium sealer will stay flexible life plane Actually planes trailing edge sweep no dihedral just make proper bend horn solidly affix arms flaps works fine no bind whatsoever fuselage can get too heavy youre careful lightening holes must Its bigger chunk wood might think prepared also shock big slabs perched atop wing Seldom does wife comment about Stunt ships during construction stage Sometimes after completed get Oh thats nice shade blue doesnt have pilot wife confronted morning after cut out profile fuselage mounted atop wing What heavens name ing out year entire airplane covered Top though profile airplane Im sure would classify novice project mainly because wing dihedral wing must built jig tubes' As far Im concerned method way build wing whether has dihedral jig tubes assure straight warp-free wing imperative Stunt ship plane wont work dihedral either wont look right thing di hedral needed get lead-outs up CG airplane Dont influenced say plane dihedral wont turn same inside outside Taint talking about 30 performance good straight-wing ship cant find aluminum tubes hardware stores have solid -in aluminum rod works just well tubes supported leveled both tips also center section wing completely constructed Flite FabriKote Lite component 172 Model Aviation Monocoupe 90A 1/4 scale Send $200 br Catalog Ikon NWST Dept MA PO Box 566 Auburn WA 98002 206 941-8248 sV H 2 Wing Span--iti Wing Area 566 Sq 2 SENSOAR glider HOBBY HORN Eaclusive 1 HOBBY HORN Kit SENSOAR Glider kit isa high quality kit Machine cut ed parts Select quality balsa spruce Detailed plans written instructions THERMAL SLOPE 05 ELECTRIC POWER VALUE PRICED 51600 _____________ 5ull artist Kits P & W Semi-Kits Combined full plan Now mel Wire tfindose etc Mat Note may purchased just sem kits planswrite colt prices 1936 Baeeaoeer54-$St 1038 CSpper MR l72-$39 1937 l3attaim SptsertOt$0t 1940 Raoger46- $27 1939 Mereury-72--S36 1931 Miss Amer ea-04---5S9 1941 Playboy Jrt4929 1045 Playbsy SrtO046 1938 Power House04-$43 1940 Sailplsoe7t- $74 tt4t So Long-50-$l0 1038 Treoton Terror-73-$32 1938 ZiperS4-S4t 1039 Korda Wakefield-44 $17 MIDWAY MODEL CO SemI-kits Combined v/strip 1936 Flying Quaker-54$40 1937 Qualser Ftash07$3t 1937 tong Cabin70nS42 1937 Air Chieff 40 TRUCKS194079Span835Sqin .ew ruler Combo tFulll Kit$0300 SCALE PLANS end 0RAWING SSt HEINKEL HEmOD 62 60s $1000 SHIPPING AND HANDLING 5t AL US up $800 add $150 $200 PP/lot Class $001 $3090 add $225 copy mitt sent $2001 $4100 odd $300 freewhen requested$4591 $7000 odd $310 order over $7000 sdd $400 BY HORN CA Addressees add 0% taX 0hobby specialties Send 510 Visa/MCt#Exp15173 Moran Street IA] Check tallow up 30 Box 2212 days check clearanceWestminster Ca 92603 CODExact Charges 893-8311 Hdt Cash OnlvtAU UPS] t 0951203