Electrics Bob Kopski ELECTRIC ACTIVITIES summer distinctly different summers past Folks around part East have opportunity visit par ticipate several organized Electric events year thats different KRC Electric Fly no longer game town Lets take brief look two such meets just past SAM 76 Electric event two weeks since annual SAM 76 Old-Timer meet Hatfield PA year group ran first-ever Electric event along regular O-T gas categories July 14 very hot very windy lat ter did tend think reduce total amount flyingthere several Electric gas planes brought out cars day Electric event drew four entries onto field four battled out among themselvesand against persuasive steady wind no crashes 50 Model Aviation Herb Dirks flew Leisure-powered Cabin Playboy 1985 SAM 76 OldTimer meet CD allowed hand-launch es because steady high wind Herb maxed flight took third Electric event Part large electric inventory Holleys Silent Flight Bethel CT Larger inventory enthusiasm Electric shared Dwight Mary Ann Holley also have RC Sailplane kitsand very model Dwight used capture 1982 World Champion title Bob praises Etude kit sitting table everyone seemed enjoy low-key fun typical particular O-T affair end no losers win ners went home prizes provided John Pond Plans Service Leisure Elec tronics Sonictronics SAM 76 Electric event simple rules CD Contest Director established 12-minute max conditions everyone could fly out charge two attempts four entries two made consecutive maxes two went again Results mazes still tie first place CD decreed unlim ited flyoff point yours truly conContinued page 142 Somewhere photo Sigrid Rich ters Alex Richters Klemm L-25d seen South Shore Electric fly Weighs 51 lb uses 20950 mAh cells Unger 18 motor also uses 1612 Ah cells Char lie Sylvias Electric fleet shown behind Bud Chappel Sport Scale China Clipper fame built Ford Trimotor four beautiful models brought South Shore Electric Fly uses 18 800-mAh cells power three Mabuchi 05-size motors Its 5/ lb flies 680 sq wing area December 1985 51 Brian Bailies Cabin Playboy used geared Astro cobalt 15 swinging 3-bladed Robbe folding prop 4-cell pack lithium batteries shown taped bottom p lane Pack provides nominal 5 volts 12 amps 20-30 minutes flight time Super battery performance accompanied super battery price too TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals R/O Club Toledo Ohio entire length tape used keep epoxy oozing Out through breaks next step involves cutting fiberglass cloth bridge cracks about two ches either side applying inside fuselage epoxy What epoxy Use epoxy working life least 30 minutes cloth can well-satured smoothed out thor oughly over cracks use fingers finicky builders can use brush epoxy has cured tape outside removed point outside fuselage wont look pretty because cracks will still have uneven surface next step will take care Mix up batch filled epoxy use Sears Filled Epoxy Cement Number 9 80605 tough brittle sands well leaves paintable surface Apply area repair epoxy barely higher un damaged area put pieces mask ing tape over top epoxy help conform surface keep running out area cures epoxy cures remove masking tape low spots enough epoxy applied will necessary just enough used small amount hand-sanding will bring repaired area down perfect match adjacent surfaces other hand too much epoxy applied use sanding block bring Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $4 00 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March repaired area down close other surface finish job light hand-sanding Looks good doesnt couple coats primer sanded between coats will make look better Finish painting should make repaired area nearly indistinguishable way see contest red white black Tiporare challenge tell repaired follow techniques described above can issue challenge like next repair job too Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32S48 RC Electrics/Kopski Continued page 51 ceded Brian Baffle Robbinsville NJ grounds simply could keep up lithium-powered Play boy Yeslithium Ni-Cd Brian has good fortune have ready supply custom-provided oneshot lithium cells energy source has significantly higher energy density nickel-cadmium systems saw no point stacking up 16 1 2-Ah sourced five-lb Cub against him Cub An O-T Yep Peerless offered six-foot Cub 1937 So settled second place fact plenty fun way Im delighted SAM COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED 76 gave Electric try did matter out-technologied O-T Electric event success Well entries did Tex aco event Electric en tries first KRC Elec tric Fly Electrics made up about 15-20% planes flew Initial reaction SAM 76 gonna again next year success betcha buddy initial try Electric O-T drew con siderable interest liquid-fuel crowd feel sure participation will double next year O-T readers others well take example set up Electric event area Keep first simple forget complex rulesand keep fun Thats what hobbys personal Thanks go out SAM 76 congratulations nice job Seuth Shere RC Club Electric Fly Sun day July 21 another hot day calmat least Bridgewater MA site South Shore RC Club fly ing site CD Charlie Sylvia ran clubs First Annual Electric Fly meet 716-mile round trip very much success firstever Electric activity meet patterned after KRC Electric Fly low-key affair awards third Continued page 144 MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/2 inches tall large 10 oz capacity its real attention getter definite collectors piece years come Only Plus $200 postage $695 o handling per ordet CA residents add sales tax REPLACEMENT PARTS FOR Kraft Engines Testori McCoy TaIpen 40 RJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available B JIEROKEE RARE THE REALLY BIG LITTLE AIRPLANE Past AssemblyDesigned intermediate smelt sine 53 Span proportional radios Hardwood Spars Steerable Nose GearVK MODEL Radio MultI-ChiinitelAIRCRAFT CO Symmetrical RoiItap Stab Airfoil 18% Symmetrical 5868 Transit Rd Recommended Engines 2440DoPow NY 14043 Formed Plastic Cowl Wiadabield Includes Wira Parse Nylon Hardware 684-5555 Pull Span Tapered Ailerons Rudder 142 Model Aviation RIL Industries ox 5654 dena CA 91107 Phone 818 359-0016 MULTIPLEX DEALER INQUIRIES INVITED 2001 FM Narrowband RCM L V1ZZZZExcIusive MEMORY SOFT MODULE 14 Ch ROYAL mc! FIight Tested Since 1979 7725 E REDFIELD RD SUITE 105 SCOTTSDALE AIRPARKO SCOTTSDALE ARIZONA 85260 0 PHONE 602 483-9577 place three categories no tooth-and-nail regimen South Shore group club members judge Best Plane Most Aerobatic Longest Flight latter struc tured man-on-man fly Aerobatic judge other AMA District VP Don Krafft addition some surprise prizes farthest traveled largest plane etc 10 participants flew total 22 Electrics sorts day long Some positively beautiful later col umns will present some best photos final results become available again no serious mishaps everyone seemed have great time South Shore group has excellent flying site grounds mediumsecurity penitentiary plenty room around some crops bound ing side spectator area separated pit area wellseparated strip grass well-groomed Electric ROGs rise off-ground easily done Ive spoken CD Charlie since meet tells intends again next year Keep tuned col umn announcement plan attending Im much driv ing such distances one-day meet great time want thank Charlie et al splendid first-time Electric meet Electric supplies trip Bridgewater MA would have happened gracious invitation Dwight Mary Ann Holley Bethel CT stop over way Bethel almost exactly halfway visit delightful indeed Dwight 1982 RC Soaring World Champion took real interest Electric after visiting 1984 KRC Electric Fly participant time Dwight really participant nowhes caught silent flight powered un powered instituted Holleys Silent Flight purpose supplying quiet need absolutely amazed Electric inventory Dwight has amassed just few months Kits motors accesso ries around world Batteries sizes including new 950 mAh size Ill report later column much besides Ive very active Electric 13 years didnt know some stuff existed en courage check out ad issue get copy catalog Youll find wealth suppliesall best isat attractive prices youll find friendly energetic knowledgeable helpful Dwight Holley ready help NowfinallyI have good solid answer letters get lamenting distinct lack Electric supplies knowledge local hobby shops re questing get information Write Dwight Charger time switchesagain Wouldnt ya know just finish some discussion charger time switches last col umn October 1985 proclaiming reli able trouble-free areand now hear theres rash sticky timers out lately Good griefsmoked batteries suggest reread last months column check out timer new charger number dry runs bench Both major Electric manufactur ers country use quality timers major supplier ordinarily work just great So may have exercise warranty dont also shout Electric providersthey try hard good job Its just sometimes have problems too Maybe timer gears made Monday someone tough weekend Anyway please assure yourself costly batteries jeopar dy watch new charger timer before trust its own Basic Electricity last installment seemingly never-ending short course discussed multimetersin particular voltmeter part saw basic Continued page 146 RA MFG OF NI-STARTER L NI STARTER revolutronary concep model engines used boats cars airplanes NI STARTERITMI uses HeadlockITMI adapter locks onto glow plugs stars yosr engine Fits yoar pocket comes CItO charger has LED lights op charging Rechargeable hundreds ot times gives over 50 consecutive starts recharging Available charger Send ad along prepayment receive free shipping handling $2495 charger NI-STARTER$2495 charger Itt OV 220V t 2V taut chargerl NI-STARTER$1 595 charger Chargers$1 295 charger tOV 22tV 12V fast churgerl PLEASE SPECIFY WHICH CHARGER WHEN ORDERING 12421 RANSOM DRIVE GLENN DALE MD 20769301464-2260 144 Model Aviation r ATTENTION ERS EPOXY GLASS COWLS FOR NOSES PICA 50 MOROAN BALSA USA PLATT CONCEPT FLEET HOSTETLER RCM TCRAFr SHEBER PIUS CALE SUPEe CUS FOIcKEe 07 BOEING Pt2 P25 F4B2 PHBH SPARROW HAWK GEE BEE MOO Y MACBRIENS TUReULENT CHeISTEN EAOLE BRISIOHELLAS STARDUSTES II E J3Bt BABY FLYRAeY S OTHE RS WHEEL PANTS FOR CITAeeIA STAROUSTER II PIUS SKYeOLT LieceTy SPORT CHRISTEN EAOLE PeE HAWK MULLIGAN & OTHERS LARGE SCALE PLANS AVAILABLE Please send $100 tar complete list supply Modelers fiberglass parts plans Write call us T & D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN CITY Ml 45535 PHONE 313 421-6358 BRAZED S HEAT-TREATED WIRE GEARS & CABANES PHONE 313 261-9064 DGA DESIGNS Body Pilot Kit sLightest Pilot available eLifeilke vinyl la tex rubber parts 0 Easy assemble finish eBuild either barnstormer sportsman pilot sKit contains pilot head hands boots helmet cap goggles full templates easy instructions eFuily positionable & moveable eSome simple sewing required WeightPrice 1/6 Scale2 oz$ 795 1/4 Scale4 oz$ 995 1/3 Scale6 oz$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4Scale 1Soz 1/3Scale 225 oz Price 595 795 $1 495 Lightest bust pilot available oLifelike vinyl latex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 fer current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks tor check clearSorry-No COD s hI1wu ml 1LCj1~ meter movementa very sensitive device itselfis combined selection external resistors series make dial read several voltage ranges switch-selectable resistors known multipliers effect scale meter face different fullrange values voltage Using 25-volt scale meter well-suited read terminal voltage single Ni-Cd flashlight cell Selecting 50-volt range meter well-suited check charg ing voltage new 20-cell aerobatic motor battery just installed Such idea behind multimetermany useful meter scales box However addition multime ters include several functions Typically offer current ammeter resis tance ohmmeter functions addition voltage function already discussed Just several voltage ranges offered also have several current resis tance ranges Some multimeters use combination switches select func tions scales some use array different test-probe jacks accomplish same thing latter case just plug test leads appropriatelymarked jacks Current ranges scaled vari ous range values withyou guessed resistors theres big differ ence between multipliers used scale voltage ranges shunts used scale current ranges Youll recall multipliers very large resistance valuemany thousands millions ohms shunts typically low values resistance hundreds ohms downward fractions ohms does work Youll recall earlier installments Basic Electricity typical basic meter movement found within multimeters requires VERY little current VERY little voltage deflect full scale meter movement verylow-voltage meter and/or very-lowcurrent meter its owndepending choose view Thus order measure motor current example AMPERES taken motor must SHUNTED away meter movement known precise way remaining MICROAMPERES flow through movement accurate known frac tion total example motor current may TENS OF THOU SANDS times larger current moves meter needle Thus lowvalue shunt resistors connected direct ly across meter movement terminals parallel connection some circuit current flows through bothdepending relative values resistance Since electricity follows path least resistance current flows through shunt resistor relatively high resistance meter movement passes small current another way view opera146 Model Aviation tion current metersometimes simpler understand having useful meaning other aspects Electric modeling Lets recall again basic meter movement requires very little voltage applied its terminals move full scale typical internal resistance such movements can thousands ohms Remember voltmeters used measure voltage ACROSS something such battery circuit component Keeping mind suppose VERY SMALL resistorsay about 10 milliohms 10 one-thousandths ohm readily represented short piece hookup wire Yes wire has resistance Say now install wire resistor series motor cir cuitsorta like part actual wiring itselfso motor current flows through Lets say example motor draws 10 amps earlier installments miniseries know voltage drop across special low-value resistor/wire caused flowing motor current would VIxR could also written V 10 amps x 10/1000 ohms same V 100/1000 1/10 olt shunt resistor would therefore present voltage its terminals 01 volt 01 volt meter movement con nected across resistor would deflect full scale effect wire shunt 'component' purpose 'sam ple current flowing tiny resulting voltage drop can measured low-voltage voltmeternamely basic meter movement itself meter scale marked 0 10 amps wed have real working 10-amp meter 10-amp range multimeter example numbers used just thatex amples chosen purposes illustration representative ac tual conditions real applications meter movement having couple thousand ohms resistance its own has no significant effect value resistance very-small-value shunt true such cases given example However smaller current-meter rangessay milliam pere areathe value shunt resistor becomes closer value meter movement resistance affects other As special example shunt resistor exactly equal meter movement resistance meter scale value would double since ap plied circuit would divide equally between movement resistance external shunt insight offered above will prove Continued page 148 ProTechTor NFO- EARS BERGERON ENTERPRISES 443 ROBERTA FULLERTON CA 92632 MODEL PRODUCTS 07444 CORPORAT ON PU ha 314 Pmpiu Plains HEAD Copyright 1977 MPG P R 0 F E S S I_____ 0 N L LOCK ghs ese ed DONT GET KLIPPED GET U iSame eau two inga4 NO FORCE o/1L4atLon SL~ Lody 404 tong c04404i0n 4L LL4 3 48 inch ILad -tanda4d glow plug4 cluding BRIDI £NI/A 9LO-DVIL t OS 4 Stto/cL plu6 FOX FIR& BALL TEO-D&VtL 4L0-BLL 2oZ OPS ROSSI 2 SLr $695 IfI veAhI writ 4erce odd SOC useful should want add rangesor capabilityof instru ment such example concerns fact multimeters offer built-in 10 amp range Electric power systems operate currents greater 10 amps Another example concerns use common 20-volt range digital multimeters what really need 40-volt range Later well see deal other special cases using nitty gritty information preceding discussion just What Im doing trying hammer home fact current meters cluding multimeters current range always connected SERIES circuit youre measuring current flow very important distinction voltmeter always con nected ACROSS parallel component voltage being measured Think current meter water-flow meter current water must flow THROUGH measured Since cur rent meters have VERY LOW internal resistance connecting across charged battery example would stantly damage meter activate protective device meter might contain Finally since obvious current meters cause in-circuit drop least some small voltage would prob ably notice slight change motor rpm meter circuit current-meter voltage drop called 'burden~ insertion drop' usually between 01 03 volts full-scale meter deflection similar situation condition voltmeters Voltmeters require small current operation cur rent stolen circuit being measured effect called loading required current normally very smalla battery wouldnt notice wanted measure voltage across component itself has very little current flowing through rob bing could very significant Fortu nately latter condition does occur Electric power circuits because circuit currents high voltmeter effect goes unnoticed effects would very noticeable such circuits receiver other lowpower high-resistance electronic assem blies often must accounted Thus pure sense measure some thing change hope now recognize significance wiring similar losses Electric model power systems Current flowing through wiring connectors fuses switches etc causes voltage lossand consequently motor power loss Later well see evaluate such losses minimize See insight multimeters work can give appreciation things happen power installationsas promised Next month Basic Electricity con tinues such discussions regarding actual use voltage current functions multimeters some insight operation ohmmeter ranges Please forward questions include SASE please author Bob Kopski 25 West End Dr Lans dale PA 19446 RC Old-Timers/Mathews Continued page 53 reproductions same engines has little surge interest letters also make painfully obvious writers have strong interest using Bill Schmidts igni tion system totally lack capability building circuit drawings Joe Klaus has come rescue Kustom Kraftsmanship operation will soon make available completely assem bled potted circuit board unit reasonable cost Now abso lutely reason either buy repro engine ranging John Morrells little Atom MG Products Forster 99 pick up ignition timer parts old engine youve lying around years Micro Model Engineering Kustom Kraftsmanships address PO Box 2699 Laguna Hills CA 92654 Telephone 714/830-5162 Micro Model Engineerings address 1301 W Lafayette St Sturgis MI 49091 Telephone 616/651-5431 Flash Ohlsson engines dominate Colusa CA contest Contestants flying models powered Ohlsson 60 ignition engines won three firsts second Only 1AA Texaco big Texaco events won other engines Ohlsson sec ond big Texaco antique brute power name game Ohlsson 60-pow ered model outdid challenges cluding several Schnuerle glow-powered entries spite longer allowed motor runs glow brutes due heavier models about Caveat emptor Thats Latin term mean ing buyer beware have examined several previously-mentioned reproduction engines recently part exhibit excellent work manship run well sometimes better originals did matter fact least two examples absolutely subpar both workmanship materi als Ill name since two ex amples might have exceptions rule shaft running downhill case bolts holding front housing ran off-center holes castings must have finished Continued page 150 148 Model Aviation GLOW PLUG CONNECTOR WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9875053 three swipes coarse file other popped crank pin after third run came cast spinner out-of-round naked eye could see point . buy reproductions approval clear understanding what guarantees Most manufacturers importers doing excellent work wont hesi tate assure buyer quality prod uct refusedont buy Dee B Mathews 8420 Nantucket Wichita KS 67212 RC Giant Scale/Beckman Continued page 55 years ago flying full-scale homebuilt replica Sopwith Triplane through generosity permitted STARS use own private full-scale landing strip clubs base operations has generously continued permission Carolyn Clapp widow mayor common council city Olean have graciously permitted local Municipal Airport closed full-scale aircraft during two-day Ral ly used exclusively Radio Con trol Scale event STARS Scale Rallies have existed concept must held Sunday fliers bulk model air craft participants no competi tion whatsoever no so-called landing registration fee Just come fly fact register ship display and/or fly given ticket free barbecue chicken dinner Scale ships order day size has never challengedlarge Giant Scale smaller Scale always welcome Though event has become associated Giant Scale basically trueany size welcome providing scale Saturday July 6 started off cool day moderate wind completely over cast sky seemed threaten rain moment did deter registrants Two flight lines set up hard-surfaced main runway airport used eight fliers time six fliers air almost con tinuously carefully-coordinated event flying went along hitch Three ducted-fan models flown superb Helicopter demonstration well 1984 total 124 regis trants two-day event noon Saturday 1985 Rally 118 registrants close ac tivities first day total 144 registrantsthe largest ever approximately 330 pm rains camebucket after bucket full very short time stopped completely flying resumed once again large scale rained another 10 minutes 200 chicken barbecue din ners being cooked would have wiped out As charcoal pits regained heat dinner served about half hour later usual After conclusion flying day STARS held its first model aircraft auction hesitancy some cluding thought might adding already overworked program activities Graciously Frank Anderson Mississauga Ontario former MAAC president offered auctioneer Within relatively short period time Frank everything auctioned off ap pears model aircraft auction will now standard portion annual Scale Rally usual Saturday evening social took placea large bonfire food beverages available fliers families camped Municipal Airport Sunday dawned cool completely over cast intermittent persistent drizzle Flying limited brave souls just wanted fly time spite inclement weather five registrants Sunday morning making grand total 149again largest ever would have registered two full TItn1jq b#wS Save tII8to~001 St Is. @ Tlnlef S pointS afl 150 Model Aviation RC VIDEO. GAZINE PES. Continued page 152 FAI RUBBER Sizes 1/4 3116 1/8 3/32 1/16 042 thick pound box Price $1300 FREE 4 oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits incH Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig ft KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAl Model Supply Ignition Engine Parts Only Over 450 Items Send $200 current catalog PO sox 3557 TORRANCE CA 00510
Edition: Model Aviation - 1985/12
Page Numbers: 50, 51, 142, 144, 146, 148, 150
Electrics Bob Kopski ELECTRIC ACTIVITIES summer distinctly different summers past Folks around part East have opportunity visit par ticipate several organized Electric events year thats different KRC Electric Fly no longer game town Lets take brief look two such meets just past SAM 76 Electric event two weeks since annual SAM 76 Old-Timer meet Hatfield PA year group ran first-ever Electric event along regular O-T gas categories July 14 very hot very windy lat ter did tend think reduce total amount flyingthere several Electric gas planes brought out cars day Electric event drew four entries onto field four battled out among themselvesand against persuasive steady wind no crashes 50 Model Aviation Herb Dirks flew Leisure-powered Cabin Playboy 1985 SAM 76 OldTimer meet CD allowed hand-launch es because steady high wind Herb maxed flight took third Electric event Part large electric inventory Holleys Silent Flight Bethel CT Larger inventory enthusiasm Electric shared Dwight Mary Ann Holley also have RC Sailplane kitsand very model Dwight used capture 1982 World Champion title Bob praises Etude kit sitting table everyone seemed enjoy low-key fun typical particular O-T affair end no losers win ners went home prizes provided John Pond Plans Service Leisure Elec tronics Sonictronics SAM 76 Electric event simple rules CD Contest Director established 12-minute max conditions everyone could fly out charge two attempts four entries two made consecutive maxes two went again Results mazes still tie first place CD decreed unlim ited flyoff point yours truly conContinued page 142 Somewhere photo Sigrid Rich ters Alex Richters Klemm L-25d seen South Shore Electric fly Weighs 51 lb uses 20950 mAh cells Unger 18 motor also uses 1612 Ah cells Char lie Sylvias Electric fleet shown behind Bud Chappel Sport Scale China Clipper fame built Ford Trimotor four beautiful models brought South Shore Electric Fly uses 18 800-mAh cells power three Mabuchi 05-size motors Its 5/ lb flies 680 sq wing area December 1985 51 Brian Bailies Cabin Playboy used geared Astro cobalt 15 swinging 3-bladed Robbe folding prop 4-cell pack lithium batteries shown taped bottom p lane Pack provides nominal 5 volts 12 amps 20-30 minutes flight time Super battery performance accompanied super battery price too TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals R/O Club Toledo Ohio entire length tape used keep epoxy oozing Out through breaks next step involves cutting fiberglass cloth bridge cracks about two ches either side applying inside fuselage epoxy What epoxy Use epoxy working life least 30 minutes cloth can well-satured smoothed out thor oughly over cracks use fingers finicky builders can use brush epoxy has cured tape outside removed point outside fuselage wont look pretty because cracks will still have uneven surface next step will take care Mix up batch filled epoxy use Sears Filled Epoxy Cement Number 9 80605 tough brittle sands well leaves paintable surface Apply area repair epoxy barely higher un damaged area put pieces mask ing tape over top epoxy help conform surface keep running out area cures epoxy cures remove masking tape low spots enough epoxy applied will necessary just enough used small amount hand-sanding will bring repaired area down perfect match adjacent surfaces other hand too much epoxy applied use sanding block bring Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $4 00 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March repaired area down close other surface finish job light hand-sanding Looks good doesnt couple coats primer sanded between coats will make look better Finish painting should make repaired area nearly indistinguishable way see contest red white black Tiporare challenge tell repaired follow techniques described above can issue challenge like next repair job too Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32S48 RC Electrics/Kopski Continued page 51 ceded Brian Baffle Robbinsville NJ grounds simply could keep up lithium-powered Play boy Yeslithium Ni-Cd Brian has good fortune have ready supply custom-provided oneshot lithium cells energy source has significantly higher energy density nickel-cadmium systems saw no point stacking up 16 1 2-Ah sourced five-lb Cub against him Cub An O-T Yep Peerless offered six-foot Cub 1937 So settled second place fact plenty fun way Im delighted SAM COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED 76 gave Electric try did matter out-technologied O-T Electric event success Well entries did Tex aco event Electric en tries first KRC Elec tric Fly Electrics made up about 15-20% planes flew Initial reaction SAM 76 gonna again next year success betcha buddy initial try Electric O-T drew con siderable interest liquid-fuel crowd feel sure participation will double next year O-T readers others well take example set up Electric event area Keep first simple forget complex rulesand keep fun Thats what hobbys personal Thanks go out SAM 76 congratulations nice job Seuth Shere RC Club Electric Fly Sun day July 21 another hot day calmat least Bridgewater MA site South Shore RC Club fly ing site CD Charlie Sylvia ran clubs First Annual Electric Fly meet 716-mile round trip very much success firstever Electric activity meet patterned after KRC Electric Fly low-key affair awards third Continued page 144 MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/2 inches tall large 10 oz capacity its real attention getter definite collectors piece years come Only Plus $200 postage $695 o handling per ordet CA residents add sales tax REPLACEMENT PARTS FOR Kraft Engines Testori McCoy TaIpen 40 RJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available B JIEROKEE RARE THE REALLY BIG LITTLE AIRPLANE Past AssemblyDesigned intermediate smelt sine 53 Span proportional radios Hardwood Spars Steerable Nose GearVK MODEL Radio MultI-ChiinitelAIRCRAFT CO Symmetrical RoiItap Stab Airfoil 18% Symmetrical 5868 Transit Rd Recommended Engines 2440DoPow NY 14043 Formed Plastic Cowl Wiadabield Includes Wira Parse Nylon Hardware 684-5555 Pull Span Tapered Ailerons Rudder 142 Model Aviation RIL Industries ox 5654 dena CA 91107 Phone 818 359-0016 MULTIPLEX DEALER INQUIRIES INVITED 2001 FM Narrowband RCM L V1ZZZZExcIusive MEMORY SOFT MODULE 14 Ch ROYAL mc! FIight Tested Since 1979 7725 E REDFIELD RD SUITE 105 SCOTTSDALE AIRPARKO SCOTTSDALE ARIZONA 85260 0 PHONE 602 483-9577 place three categories no tooth-and-nail regimen South Shore group club members judge Best Plane Most Aerobatic Longest Flight latter struc tured man-on-man fly Aerobatic judge other AMA District VP Don Krafft addition some surprise prizes farthest traveled largest plane etc 10 participants flew total 22 Electrics sorts day long Some positively beautiful later col umns will present some best photos final results become available again no serious mishaps everyone seemed have great time South Shore group has excellent flying site grounds mediumsecurity penitentiary plenty room around some crops bound ing side spectator area separated pit area wellseparated strip grass well-groomed Electric ROGs rise off-ground easily done Ive spoken CD Charlie since meet tells intends again next year Keep tuned col umn announcement plan attending Im much driv ing such distances one-day meet great time want thank Charlie et al splendid first-time Electric meet Electric supplies trip Bridgewater MA would have happened gracious invitation Dwight Mary Ann Holley Bethel CT stop over way Bethel almost exactly halfway visit delightful indeed Dwight 1982 RC Soaring World Champion took real interest Electric after visiting 1984 KRC Electric Fly participant time Dwight really participant nowhes caught silent flight powered un powered instituted Holleys Silent Flight purpose supplying quiet need absolutely amazed Electric inventory Dwight has amassed just few months Kits motors accesso ries around world Batteries sizes including new 950 mAh size Ill report later column much besides Ive very active Electric 13 years didnt know some stuff existed en courage check out ad issue get copy catalog Youll find wealth suppliesall best isat attractive prices youll find friendly energetic knowledgeable helpful Dwight Holley ready help NowfinallyI have good solid answer letters get lamenting distinct lack Electric supplies knowledge local hobby shops re questing get information Write Dwight Charger time switchesagain Wouldnt ya know just finish some discussion charger time switches last col umn October 1985 proclaiming reli able trouble-free areand now hear theres rash sticky timers out lately Good griefsmoked batteries suggest reread last months column check out timer new charger number dry runs bench Both major Electric manufactur ers country use quality timers major supplier ordinarily work just great So may have exercise warranty dont also shout Electric providersthey try hard good job Its just sometimes have problems too Maybe timer gears made Monday someone tough weekend Anyway please assure yourself costly batteries jeopar dy watch new charger timer before trust its own Basic Electricity last installment seemingly never-ending short course discussed multimetersin particular voltmeter part saw basic Continued page 146 RA MFG OF NI-STARTER L NI STARTER revolutronary concep model engines used boats cars airplanes NI STARTERITMI uses HeadlockITMI adapter locks onto glow plugs stars yosr engine Fits yoar pocket comes CItO charger has LED lights op charging Rechargeable hundreds ot times gives over 50 consecutive starts recharging Available charger Send ad along prepayment receive free shipping handling $2495 charger NI-STARTER$2495 charger Itt OV 220V t 2V taut chargerl NI-STARTER$1 595 charger Chargers$1 295 charger tOV 22tV 12V fast churgerl PLEASE SPECIFY WHICH CHARGER WHEN ORDERING 12421 RANSOM DRIVE GLENN DALE MD 20769301464-2260 144 Model Aviation r ATTENTION ERS EPOXY GLASS COWLS FOR NOSES PICA 50 MOROAN BALSA USA PLATT CONCEPT FLEET HOSTETLER RCM TCRAFr SHEBER PIUS CALE SUPEe CUS FOIcKEe 07 BOEING Pt2 P25 F4B2 PHBH SPARROW HAWK GEE BEE MOO Y MACBRIENS TUReULENT CHeISTEN EAOLE BRISIOHELLAS STARDUSTES II E J3Bt BABY FLYRAeY S OTHE RS WHEEL PANTS FOR CITAeeIA STAROUSTER II PIUS SKYeOLT LieceTy SPORT CHRISTEN EAOLE PeE HAWK MULLIGAN & OTHERS LARGE SCALE PLANS AVAILABLE Please send $100 tar complete list supply Modelers fiberglass parts plans Write call us T & D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN CITY Ml 45535 PHONE 313 421-6358 BRAZED S HEAT-TREATED WIRE GEARS & CABANES PHONE 313 261-9064 DGA DESIGNS Body Pilot Kit sLightest Pilot available eLifeilke vinyl la tex rubber parts 0 Easy assemble finish eBuild either barnstormer sportsman pilot sKit contains pilot head hands boots helmet cap goggles full templates easy instructions eFuily positionable & moveable eSome simple sewing required WeightPrice 1/6 Scale2 oz$ 795 1/4 Scale4 oz$ 995 1/3 Scale6 oz$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4Scale 1Soz 1/3Scale 225 oz Price 595 795 $1 495 Lightest bust pilot available oLifelike vinyl latex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 fer current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks tor check clearSorry-No COD s hI1wu ml 1LCj1~ meter movementa very sensitive device itselfis combined selection external resistors series make dial read several voltage ranges switch-selectable resistors known multipliers effect scale meter face different fullrange values voltage Using 25-volt scale meter well-suited read terminal voltage single Ni-Cd flashlight cell Selecting 50-volt range meter well-suited check charg ing voltage new 20-cell aerobatic motor battery just installed Such idea behind multimetermany useful meter scales box However addition multime ters include several functions Typically offer current ammeter resis tance ohmmeter functions addition voltage function already discussed Just several voltage ranges offered also have several current resis tance ranges Some multimeters use combination switches select func tions scales some use array different test-probe jacks accomplish same thing latter case just plug test leads appropriatelymarked jacks Current ranges scaled vari ous range values withyou guessed resistors theres big differ ence between multipliers used scale voltage ranges shunts used scale current ranges Youll recall multipliers very large resistance valuemany thousands millions ohms shunts typically low values resistance hundreds ohms downward fractions ohms does work Youll recall earlier installments Basic Electricity typical basic meter movement found within multimeters requires VERY little current VERY little voltage deflect full scale meter movement verylow-voltage meter and/or very-lowcurrent meter its owndepending choose view Thus order measure motor current example AMPERES taken motor must SHUNTED away meter movement known precise way remaining MICROAMPERES flow through movement accurate known frac tion total example motor current may TENS OF THOU SANDS times larger current moves meter needle Thus lowvalue shunt resistors connected direct ly across meter movement terminals parallel connection some circuit current flows through bothdepending relative values resistance Since electricity follows path least resistance current flows through shunt resistor relatively high resistance meter movement passes small current another way view opera146 Model Aviation tion current metersometimes simpler understand having useful meaning other aspects Electric modeling Lets recall again basic meter movement requires very little voltage applied its terminals move full scale typical internal resistance such movements can thousands ohms Remember voltmeters used measure voltage ACROSS something such battery circuit component Keeping mind suppose VERY SMALL resistorsay about 10 milliohms 10 one-thousandths ohm readily represented short piece hookup wire Yes wire has resistance Say now install wire resistor series motor cir cuitsorta like part actual wiring itselfso motor current flows through Lets say example motor draws 10 amps earlier installments miniseries know voltage drop across special low-value resistor/wire caused flowing motor current would VIxR could also written V 10 amps x 10/1000 ohms same V 100/1000 1/10 olt shunt resistor would therefore present voltage its terminals 01 volt 01 volt meter movement con nected across resistor would deflect full scale effect wire shunt 'component' purpose 'sam ple current flowing tiny resulting voltage drop can measured low-voltage voltmeternamely basic meter movement itself meter scale marked 0 10 amps wed have real working 10-amp meter 10-amp range multimeter example numbers used just thatex amples chosen purposes illustration representative ac tual conditions real applications meter movement having couple thousand ohms resistance its own has no significant effect value resistance very-small-value shunt true such cases given example However smaller current-meter rangessay milliam pere areathe value shunt resistor becomes closer value meter movement resistance affects other As special example shunt resistor exactly equal meter movement resistance meter scale value would double since ap plied circuit would divide equally between movement resistance external shunt insight offered above will prove Continued page 148 ProTechTor NFO- EARS BERGERON ENTERPRISES 443 ROBERTA FULLERTON CA 92632 MODEL PRODUCTS 07444 CORPORAT ON PU ha 314 Pmpiu Plains HEAD Copyright 1977 MPG P R 0 F E S S I_____ 0 N L LOCK ghs ese ed DONT GET KLIPPED GET U iSame eau two inga4 NO FORCE o/1L4atLon SL~ Lody 404 tong c04404i0n 4L LL4 3 48 inch ILad -tanda4d glow plug4 cluding BRIDI £NI/A 9LO-DVIL t OS 4 Stto/cL plu6 FOX FIR& BALL TEO-D&VtL 4L0-BLL 2oZ OPS ROSSI 2 SLr $695 IfI veAhI writ 4erce odd SOC useful should want add rangesor capabilityof instru ment such example concerns fact multimeters offer built-in 10 amp range Electric power systems operate currents greater 10 amps Another example concerns use common 20-volt range digital multimeters what really need 40-volt range Later well see deal other special cases using nitty gritty information preceding discussion just What Im doing trying hammer home fact current meters cluding multimeters current range always connected SERIES circuit youre measuring current flow very important distinction voltmeter always con nected ACROSS parallel component voltage being measured Think current meter water-flow meter current water must flow THROUGH measured Since cur rent meters have VERY LOW internal resistance connecting across charged battery example would stantly damage meter activate protective device meter might contain Finally since obvious current meters cause in-circuit drop least some small voltage would prob ably notice slight change motor rpm meter circuit current-meter voltage drop called 'burden~ insertion drop' usually between 01 03 volts full-scale meter deflection similar situation condition voltmeters Voltmeters require small current operation cur rent stolen circuit being measured effect called loading required current normally very smalla battery wouldnt notice wanted measure voltage across component itself has very little current flowing through rob bing could very significant Fortu nately latter condition does occur Electric power circuits because circuit currents high voltmeter effect goes unnoticed effects would very noticeable such circuits receiver other lowpower high-resistance electronic assem blies often must accounted Thus pure sense measure some thing change hope now recognize significance wiring similar losses Electric model power systems Current flowing through wiring connectors fuses switches etc causes voltage lossand consequently motor power loss Later well see evaluate such losses minimize See insight multimeters work can give appreciation things happen power installationsas promised Next month Basic Electricity con tinues such discussions regarding actual use voltage current functions multimeters some insight operation ohmmeter ranges Please forward questions include SASE please author Bob Kopski 25 West End Dr Lans dale PA 19446 RC Old-Timers/Mathews Continued page 53 reproductions same engines has little surge interest letters also make painfully obvious writers have strong interest using Bill Schmidts igni tion system totally lack capability building circuit drawings Joe Klaus has come rescue Kustom Kraftsmanship operation will soon make available completely assem bled potted circuit board unit reasonable cost Now abso lutely reason either buy repro engine ranging John Morrells little Atom MG Products Forster 99 pick up ignition timer parts old engine youve lying around years Micro Model Engineering Kustom Kraftsmanships address PO Box 2699 Laguna Hills CA 92654 Telephone 714/830-5162 Micro Model Engineerings address 1301 W Lafayette St Sturgis MI 49091 Telephone 616/651-5431 Flash Ohlsson engines dominate Colusa CA contest Contestants flying models powered Ohlsson 60 ignition engines won three firsts second Only 1AA Texaco big Texaco events won other engines Ohlsson sec ond big Texaco antique brute power name game Ohlsson 60-pow ered model outdid challenges cluding several Schnuerle glow-powered entries spite longer allowed motor runs glow brutes due heavier models about Caveat emptor Thats Latin term mean ing buyer beware have examined several previously-mentioned reproduction engines recently part exhibit excellent work manship run well sometimes better originals did matter fact least two examples absolutely subpar both workmanship materi als Ill name since two ex amples might have exceptions rule shaft running downhill case bolts holding front housing ran off-center holes castings must have finished Continued page 150 148 Model Aviation GLOW PLUG CONNECTOR WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9875053 three swipes coarse file other popped crank pin after third run came cast spinner out-of-round naked eye could see point . buy reproductions approval clear understanding what guarantees Most manufacturers importers doing excellent work wont hesi tate assure buyer quality prod uct refusedont buy Dee B Mathews 8420 Nantucket Wichita KS 67212 RC Giant Scale/Beckman Continued page 55 years ago flying full-scale homebuilt replica Sopwith Triplane through generosity permitted STARS use own private full-scale landing strip clubs base operations has generously continued permission Carolyn Clapp widow mayor common council city Olean have graciously permitted local Municipal Airport closed full-scale aircraft during two-day Ral ly used exclusively Radio Con trol Scale event STARS Scale Rallies have existed concept must held Sunday fliers bulk model air craft participants no competi tion whatsoever no so-called landing registration fee Just come fly fact register ship display and/or fly given ticket free barbecue chicken dinner Scale ships order day size has never challengedlarge Giant Scale smaller Scale always welcome Though event has become associated Giant Scale basically trueany size welcome providing scale Saturday July 6 started off cool day moderate wind completely over cast sky seemed threaten rain moment did deter registrants Two flight lines set up hard-surfaced main runway airport used eight fliers time six fliers air almost con tinuously carefully-coordinated event flying went along hitch Three ducted-fan models flown superb Helicopter demonstration well 1984 total 124 regis trants two-day event noon Saturday 1985 Rally 118 registrants close ac tivities first day total 144 registrantsthe largest ever approximately 330 pm rains camebucket after bucket full very short time stopped completely flying resumed once again large scale rained another 10 minutes 200 chicken barbecue din ners being cooked would have wiped out As charcoal pits regained heat dinner served about half hour later usual After conclusion flying day STARS held its first model aircraft auction hesitancy some cluding thought might adding already overworked program activities Graciously Frank Anderson Mississauga Ontario former MAAC president offered auctioneer Within relatively short period time Frank everything auctioned off ap pears model aircraft auction will now standard portion annual Scale Rally usual Saturday evening social took placea large bonfire food beverages available fliers families camped Municipal Airport Sunday dawned cool completely over cast intermittent persistent drizzle Flying limited brave souls just wanted fly time spite inclement weather five registrants Sunday morning making grand total 149again largest ever would have registered two full TItn1jq b#wS Save tII8to~001 St Is. @ Tlnlef S pointS afl 150 Model Aviation RC VIDEO. GAZINE PES. Continued page 152 FAI RUBBER Sizes 1/4 3116 1/8 3/32 1/16 042 thick pound box Price $1300 FREE 4 oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits incH Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig ft KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAl Model Supply Ignition Engine Parts Only Over 450 Items Send $200 current catalog PO sox 3557 TORRANCE CA 00510
Edition: Model Aviation - 1985/12
Page Numbers: 50, 51, 142, 144, 146, 148, 150
Electrics Bob Kopski ELECTRIC ACTIVITIES summer distinctly different summers past Folks around part East have opportunity visit par ticipate several organized Electric events year thats different KRC Electric Fly no longer game town Lets take brief look two such meets just past SAM 76 Electric event two weeks since annual SAM 76 Old-Timer meet Hatfield PA year group ran first-ever Electric event along regular O-T gas categories July 14 very hot very windy lat ter did tend think reduce total amount flyingthere several Electric gas planes brought out cars day Electric event drew four entries onto field four battled out among themselvesand against persuasive steady wind no crashes 50 Model Aviation Herb Dirks flew Leisure-powered Cabin Playboy 1985 SAM 76 OldTimer meet CD allowed hand-launch es because steady high wind Herb maxed flight took third Electric event Part large electric inventory Holleys Silent Flight Bethel CT Larger inventory enthusiasm Electric shared Dwight Mary Ann Holley also have RC Sailplane kitsand very model Dwight used capture 1982 World Champion title Bob praises Etude kit sitting table everyone seemed enjoy low-key fun typical particular O-T affair end no losers win ners went home prizes provided John Pond Plans Service Leisure Elec tronics Sonictronics SAM 76 Electric event simple rules CD Contest Director established 12-minute max conditions everyone could fly out charge two attempts four entries two made consecutive maxes two went again Results mazes still tie first place CD decreed unlim ited flyoff point yours truly conContinued page 142 Somewhere photo Sigrid Rich ters Alex Richters Klemm L-25d seen South Shore Electric fly Weighs 51 lb uses 20950 mAh cells Unger 18 motor also uses 1612 Ah cells Char lie Sylvias Electric fleet shown behind Bud Chappel Sport Scale China Clipper fame built Ford Trimotor four beautiful models brought South Shore Electric Fly uses 18 800-mAh cells power three Mabuchi 05-size motors Its 5/ lb flies 680 sq wing area December 1985 51 Brian Bailies Cabin Playboy used geared Astro cobalt 15 swinging 3-bladed Robbe folding prop 4-cell pack lithium batteries shown taped bottom p lane Pack provides nominal 5 volts 12 amps 20-30 minutes flight time Super battery performance accompanied super battery price too TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals R/O Club Toledo Ohio entire length tape used keep epoxy oozing Out through breaks next step involves cutting fiberglass cloth bridge cracks about two ches either side applying inside fuselage epoxy What epoxy Use epoxy working life least 30 minutes cloth can well-satured smoothed out thor oughly over cracks use fingers finicky builders can use brush epoxy has cured tape outside removed point outside fuselage wont look pretty because cracks will still have uneven surface next step will take care Mix up batch filled epoxy use Sears Filled Epoxy Cement Number 9 80605 tough brittle sands well leaves paintable surface Apply area repair epoxy barely higher un damaged area put pieces mask ing tape over top epoxy help conform surface keep running out area cures epoxy cures remove masking tape low spots enough epoxy applied will necessary just enough used small amount hand-sanding will bring repaired area down perfect match adjacent surfaces other hand too much epoxy applied use sanding block bring Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $4 00 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March repaired area down close other surface finish job light hand-sanding Looks good doesnt couple coats primer sanded between coats will make look better Finish painting should make repaired area nearly indistinguishable way see contest red white black Tiporare challenge tell repaired follow techniques described above can issue challenge like next repair job too Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32S48 RC Electrics/Kopski Continued page 51 ceded Brian Baffle Robbinsville NJ grounds simply could keep up lithium-powered Play boy Yeslithium Ni-Cd Brian has good fortune have ready supply custom-provided oneshot lithium cells energy source has significantly higher energy density nickel-cadmium systems saw no point stacking up 16 1 2-Ah sourced five-lb Cub against him Cub An O-T Yep Peerless offered six-foot Cub 1937 So settled second place fact plenty fun way Im delighted SAM COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED 76 gave Electric try did matter out-technologied O-T Electric event success Well entries did Tex aco event Electric en tries first KRC Elec tric Fly Electrics made up about 15-20% planes flew Initial reaction SAM 76 gonna again next year success betcha buddy initial try Electric O-T drew con siderable interest liquid-fuel crowd feel sure participation will double next year O-T readers others well take example set up Electric event area Keep first simple forget complex rulesand keep fun Thats what hobbys personal Thanks go out SAM 76 congratulations nice job Seuth Shere RC Club Electric Fly Sun day July 21 another hot day calmat least Bridgewater MA site South Shore RC Club fly ing site CD Charlie Sylvia ran clubs First Annual Electric Fly meet 716-mile round trip very much success firstever Electric activity meet patterned after KRC Electric Fly low-key affair awards third Continued page 144 MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/2 inches tall large 10 oz capacity its real attention getter definite collectors piece years come Only Plus $200 postage $695 o handling per ordet CA residents add sales tax REPLACEMENT PARTS FOR Kraft Engines Testori McCoy TaIpen 40 RJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available B JIEROKEE RARE THE REALLY BIG LITTLE AIRPLANE Past AssemblyDesigned intermediate smelt sine 53 Span proportional radios Hardwood Spars Steerable Nose GearVK MODEL Radio MultI-ChiinitelAIRCRAFT CO Symmetrical RoiItap Stab Airfoil 18% Symmetrical 5868 Transit Rd Recommended Engines 2440DoPow NY 14043 Formed Plastic Cowl Wiadabield Includes Wira Parse Nylon Hardware 684-5555 Pull Span Tapered Ailerons Rudder 142 Model Aviation RIL Industries ox 5654 dena CA 91107 Phone 818 359-0016 MULTIPLEX DEALER INQUIRIES INVITED 2001 FM Narrowband RCM L V1ZZZZExcIusive MEMORY SOFT MODULE 14 Ch ROYAL mc! FIight Tested Since 1979 7725 E REDFIELD RD SUITE 105 SCOTTSDALE AIRPARKO SCOTTSDALE ARIZONA 85260 0 PHONE 602 483-9577 place three categories no tooth-and-nail regimen South Shore group club members judge Best Plane Most Aerobatic Longest Flight latter struc tured man-on-man fly Aerobatic judge other AMA District VP Don Krafft addition some surprise prizes farthest traveled largest plane etc 10 participants flew total 22 Electrics sorts day long Some positively beautiful later col umns will present some best photos final results become available again no serious mishaps everyone seemed have great time South Shore group has excellent flying site grounds mediumsecurity penitentiary plenty room around some crops bound ing side spectator area separated pit area wellseparated strip grass well-groomed Electric ROGs rise off-ground easily done Ive spoken CD Charlie since meet tells intends again next year Keep tuned col umn announcement plan attending Im much driv ing such distances one-day meet great time want thank Charlie et al splendid first-time Electric meet Electric supplies trip Bridgewater MA would have happened gracious invitation Dwight Mary Ann Holley Bethel CT stop over way Bethel almost exactly halfway visit delightful indeed Dwight 1982 RC Soaring World Champion took real interest Electric after visiting 1984 KRC Electric Fly participant time Dwight really participant nowhes caught silent flight powered un powered instituted Holleys Silent Flight purpose supplying quiet need absolutely amazed Electric inventory Dwight has amassed just few months Kits motors accesso ries around world Batteries sizes including new 950 mAh size Ill report later column much besides Ive very active Electric 13 years didnt know some stuff existed en courage check out ad issue get copy catalog Youll find wealth suppliesall best isat attractive prices youll find friendly energetic knowledgeable helpful Dwight Holley ready help NowfinallyI have good solid answer letters get lamenting distinct lack Electric supplies knowledge local hobby shops re questing get information Write Dwight Charger time switchesagain Wouldnt ya know just finish some discussion charger time switches last col umn October 1985 proclaiming reli able trouble-free areand now hear theres rash sticky timers out lately Good griefsmoked batteries suggest reread last months column check out timer new charger number dry runs bench Both major Electric manufactur ers country use quality timers major supplier ordinarily work just great So may have exercise warranty dont also shout Electric providersthey try hard good job Its just sometimes have problems too Maybe timer gears made Monday someone tough weekend Anyway please assure yourself costly batteries jeopar dy watch new charger timer before trust its own Basic Electricity last installment seemingly never-ending short course discussed multimetersin particular voltmeter part saw basic Continued page 146 RA MFG OF NI-STARTER L NI STARTER revolutronary concep model engines used boats cars airplanes NI STARTERITMI uses HeadlockITMI adapter locks onto glow plugs stars yosr engine Fits yoar pocket comes CItO charger has LED lights op charging Rechargeable hundreds ot times gives over 50 consecutive starts recharging Available charger Send ad along prepayment receive free shipping handling $2495 charger NI-STARTER$2495 charger Itt OV 220V t 2V taut chargerl NI-STARTER$1 595 charger Chargers$1 295 charger tOV 22tV 12V fast churgerl PLEASE SPECIFY WHICH CHARGER WHEN ORDERING 12421 RANSOM DRIVE GLENN DALE MD 20769301464-2260 144 Model Aviation r ATTENTION ERS EPOXY GLASS COWLS FOR NOSES PICA 50 MOROAN BALSA USA PLATT CONCEPT FLEET HOSTETLER RCM TCRAFr SHEBER PIUS CALE SUPEe CUS FOIcKEe 07 BOEING Pt2 P25 F4B2 PHBH SPARROW HAWK GEE BEE MOO Y MACBRIENS TUReULENT CHeISTEN EAOLE BRISIOHELLAS STARDUSTES II E J3Bt BABY FLYRAeY S OTHE RS WHEEL PANTS FOR CITAeeIA STAROUSTER II PIUS SKYeOLT LieceTy SPORT CHRISTEN EAOLE PeE HAWK MULLIGAN & OTHERS LARGE SCALE PLANS AVAILABLE Please send $100 tar complete list supply Modelers fiberglass parts plans Write call us T & D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN CITY Ml 45535 PHONE 313 421-6358 BRAZED S HEAT-TREATED WIRE GEARS & CABANES PHONE 313 261-9064 DGA DESIGNS Body Pilot Kit sLightest Pilot available eLifeilke vinyl la tex rubber parts 0 Easy assemble finish eBuild either barnstormer sportsman pilot sKit contains pilot head hands boots helmet cap goggles full templates easy instructions eFuily positionable & moveable eSome simple sewing required WeightPrice 1/6 Scale2 oz$ 795 1/4 Scale4 oz$ 995 1/3 Scale6 oz$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4Scale 1Soz 1/3Scale 225 oz Price 595 795 $1 495 Lightest bust pilot available oLifelike vinyl latex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 fer current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks tor check clearSorry-No COD s hI1wu ml 1LCj1~ meter movementa very sensitive device itselfis combined selection external resistors series make dial read several voltage ranges switch-selectable resistors known multipliers effect scale meter face different fullrange values voltage Using 25-volt scale meter well-suited read terminal voltage single Ni-Cd flashlight cell Selecting 50-volt range meter well-suited check charg ing voltage new 20-cell aerobatic motor battery just installed Such idea behind multimetermany useful meter scales box However addition multime ters include several functions Typically offer current ammeter resis tance ohmmeter functions addition voltage function already discussed Just several voltage ranges offered also have several current resis tance ranges Some multimeters use combination switches select func tions scales some use array different test-probe jacks accomplish same thing latter case just plug test leads appropriatelymarked jacks Current ranges scaled vari ous range values withyou guessed resistors theres big differ ence between multipliers used scale voltage ranges shunts used scale current ranges Youll recall multipliers very large resistance valuemany thousands millions ohms shunts typically low values resistance hundreds ohms downward fractions ohms does work Youll recall earlier installments Basic Electricity typical basic meter movement found within multimeters requires VERY little current VERY little voltage deflect full scale meter movement verylow-voltage meter and/or very-lowcurrent meter its owndepending choose view Thus order measure motor current example AMPERES taken motor must SHUNTED away meter movement known precise way remaining MICROAMPERES flow through movement accurate known frac tion total example motor current may TENS OF THOU SANDS times larger current moves meter needle Thus lowvalue shunt resistors connected direct ly across meter movement terminals parallel connection some circuit current flows through bothdepending relative values resistance Since electricity follows path least resistance current flows through shunt resistor relatively high resistance meter movement passes small current another way view opera146 Model Aviation tion current metersometimes simpler understand having useful meaning other aspects Electric modeling Lets recall again basic meter movement requires very little voltage applied its terminals move full scale typical internal resistance such movements can thousands ohms Remember voltmeters used measure voltage ACROSS something such battery circuit component Keeping mind suppose VERY SMALL resistorsay about 10 milliohms 10 one-thousandths ohm readily represented short piece hookup wire Yes wire has resistance Say now install wire resistor series motor cir cuitsorta like part actual wiring itselfso motor current flows through Lets say example motor draws 10 amps earlier installments miniseries know voltage drop across special low-value resistor/wire caused flowing motor current would VIxR could also written V 10 amps x 10/1000 ohms same V 100/1000 1/10 olt shunt resistor would therefore present voltage its terminals 01 volt 01 volt meter movement con nected across resistor would deflect full scale effect wire shunt 'component' purpose 'sam ple current flowing tiny resulting voltage drop can measured low-voltage voltmeternamely basic meter movement itself meter scale marked 0 10 amps wed have real working 10-amp meter 10-amp range multimeter example numbers used just thatex amples chosen purposes illustration representative ac tual conditions real applications meter movement having couple thousand ohms resistance its own has no significant effect value resistance very-small-value shunt true such cases given example However smaller current-meter rangessay milliam pere areathe value shunt resistor becomes closer value meter movement resistance affects other As special example shunt resistor exactly equal meter movement resistance meter scale value would double since ap plied circuit would divide equally between movement resistance external shunt insight offered above will prove Continued page 148 ProTechTor NFO- EARS BERGERON ENTERPRISES 443 ROBERTA FULLERTON CA 92632 MODEL PRODUCTS 07444 CORPORAT ON PU ha 314 Pmpiu Plains HEAD Copyright 1977 MPG P R 0 F E S S I_____ 0 N L LOCK ghs ese ed DONT GET KLIPPED GET U iSame eau two inga4 NO FORCE o/1L4atLon SL~ Lody 404 tong c04404i0n 4L LL4 3 48 inch ILad -tanda4d glow plug4 cluding BRIDI £NI/A 9LO-DVIL t OS 4 Stto/cL plu6 FOX FIR& BALL TEO-D&VtL 4L0-BLL 2oZ OPS ROSSI 2 SLr $695 IfI veAhI writ 4erce odd SOC useful should want add rangesor capabilityof instru ment such example concerns fact multimeters offer built-in 10 amp range Electric power systems operate currents greater 10 amps Another example concerns use common 20-volt range digital multimeters what really need 40-volt range Later well see deal other special cases using nitty gritty information preceding discussion just What Im doing trying hammer home fact current meters cluding multimeters current range always connected SERIES circuit youre measuring current flow very important distinction voltmeter always con nected ACROSS parallel component voltage being measured Think current meter water-flow meter current water must flow THROUGH measured Since cur rent meters have VERY LOW internal resistance connecting across charged battery example would stantly damage meter activate protective device meter might contain Finally since obvious current meters cause in-circuit drop least some small voltage would prob ably notice slight change motor rpm meter circuit current-meter voltage drop called 'burden~ insertion drop' usually between 01 03 volts full-scale meter deflection similar situation condition voltmeters Voltmeters require small current operation cur rent stolen circuit being measured effect called loading required current normally very smalla battery wouldnt notice wanted measure voltage across component itself has very little current flowing through rob bing could very significant Fortu nately latter condition does occur Electric power circuits because circuit currents high voltmeter effect goes unnoticed effects would very noticeable such circuits receiver other lowpower high-resistance electronic assem blies often must accounted Thus pure sense measure some thing change hope now recognize significance wiring similar losses Electric model power systems Current flowing through wiring connectors fuses switches etc causes voltage lossand consequently motor power loss Later well see evaluate such losses minimize See insight multimeters work can give appreciation things happen power installationsas promised Next month Basic Electricity con tinues such discussions regarding actual use voltage current functions multimeters some insight operation ohmmeter ranges Please forward questions include SASE please author Bob Kopski 25 West End Dr Lans dale PA 19446 RC Old-Timers/Mathews Continued page 53 reproductions same engines has little surge interest letters also make painfully obvious writers have strong interest using Bill Schmidts igni tion system totally lack capability building circuit drawings Joe Klaus has come rescue Kustom Kraftsmanship operation will soon make available completely assem bled potted circuit board unit reasonable cost Now abso lutely reason either buy repro engine ranging John Morrells little Atom MG Products Forster 99 pick up ignition timer parts old engine youve lying around years Micro Model Engineering Kustom Kraftsmanships address PO Box 2699 Laguna Hills CA 92654 Telephone 714/830-5162 Micro Model Engineerings address 1301 W Lafayette St Sturgis MI 49091 Telephone 616/651-5431 Flash Ohlsson engines dominate Colusa CA contest Contestants flying models powered Ohlsson 60 ignition engines won three firsts second Only 1AA Texaco big Texaco events won other engines Ohlsson sec ond big Texaco antique brute power name game Ohlsson 60-pow ered model outdid challenges cluding several Schnuerle glow-powered entries spite longer allowed motor runs glow brutes due heavier models about Caveat emptor Thats Latin term mean ing buyer beware have examined several previously-mentioned reproduction engines recently part exhibit excellent work manship run well sometimes better originals did matter fact least two examples absolutely subpar both workmanship materi als Ill name since two ex amples might have exceptions rule shaft running downhill case bolts holding front housing ran off-center holes castings must have finished Continued page 150 148 Model Aviation GLOW PLUG CONNECTOR WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9875053 three swipes coarse file other popped crank pin after third run came cast spinner out-of-round naked eye could see point . buy reproductions approval clear understanding what guarantees Most manufacturers importers doing excellent work wont hesi tate assure buyer quality prod uct refusedont buy Dee B Mathews 8420 Nantucket Wichita KS 67212 RC Giant Scale/Beckman Continued page 55 years ago flying full-scale homebuilt replica Sopwith Triplane through generosity permitted STARS use own private full-scale landing strip clubs base operations has generously continued permission Carolyn Clapp widow mayor common council city Olean have graciously permitted local Municipal Airport closed full-scale aircraft during two-day Ral ly used exclusively Radio Con trol Scale event STARS Scale Rallies have existed concept must held Sunday fliers bulk model air craft participants no competi tion whatsoever no so-called landing registration fee Just come fly fact register ship display and/or fly given ticket free barbecue chicken dinner Scale ships order day size has never challengedlarge Giant Scale smaller Scale always welcome Though event has become associated Giant Scale basically trueany size welcome providing scale Saturday July 6 started off cool day moderate wind completely over cast sky seemed threaten rain moment did deter registrants Two flight lines set up hard-surfaced main runway airport used eight fliers time six fliers air almost con tinuously carefully-coordinated event flying went along hitch Three ducted-fan models flown superb Helicopter demonstration well 1984 total 124 regis trants two-day event noon Saturday 1985 Rally 118 registrants close ac tivities first day total 144 registrantsthe largest ever approximately 330 pm rains camebucket after bucket full very short time stopped completely flying resumed once again large scale rained another 10 minutes 200 chicken barbecue din ners being cooked would have wiped out As charcoal pits regained heat dinner served about half hour later usual After conclusion flying day STARS held its first model aircraft auction hesitancy some cluding thought might adding already overworked program activities Graciously Frank Anderson Mississauga Ontario former MAAC president offered auctioneer Within relatively short period time Frank everything auctioned off ap pears model aircraft auction will now standard portion annual Scale Rally usual Saturday evening social took placea large bonfire food beverages available fliers families camped Municipal Airport Sunday dawned cool completely over cast intermittent persistent drizzle Flying limited brave souls just wanted fly time spite inclement weather five registrants Sunday morning making grand total 149again largest ever would have registered two full TItn1jq b#wS Save tII8to~001 St Is. @ Tlnlef S pointS afl 150 Model Aviation RC VIDEO. GAZINE PES. Continued page 152 FAI RUBBER Sizes 1/4 3116 1/8 3/32 1/16 042 thick pound box Price $1300 FREE 4 oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits incH Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig ft KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAl Model Supply Ignition Engine Parts Only Over 450 Items Send $200 current catalog PO sox 3557 TORRANCE CA 00510
Edition: Model Aviation - 1985/12
Page Numbers: 50, 51, 142, 144, 146, 148, 150
Electrics Bob Kopski ELECTRIC ACTIVITIES summer distinctly different summers past Folks around part East have opportunity visit par ticipate several organized Electric events year thats different KRC Electric Fly no longer game town Lets take brief look two such meets just past SAM 76 Electric event two weeks since annual SAM 76 Old-Timer meet Hatfield PA year group ran first-ever Electric event along regular O-T gas categories July 14 very hot very windy lat ter did tend think reduce total amount flyingthere several Electric gas planes brought out cars day Electric event drew four entries onto field four battled out among themselvesand against persuasive steady wind no crashes 50 Model Aviation Herb Dirks flew Leisure-powered Cabin Playboy 1985 SAM 76 OldTimer meet CD allowed hand-launch es because steady high wind Herb maxed flight took third Electric event Part large electric inventory Holleys Silent Flight Bethel CT Larger inventory enthusiasm Electric shared Dwight Mary Ann Holley also have RC Sailplane kitsand very model Dwight used capture 1982 World Champion title Bob praises Etude kit sitting table everyone seemed enjoy low-key fun typical particular O-T affair end no losers win ners went home prizes provided John Pond Plans Service Leisure Elec tronics Sonictronics SAM 76 Electric event simple rules CD Contest Director established 12-minute max conditions everyone could fly out charge two attempts four entries two made consecutive maxes two went again Results mazes still tie first place CD decreed unlim ited flyoff point yours truly conContinued page 142 Somewhere photo Sigrid Rich ters Alex Richters Klemm L-25d seen South Shore Electric fly Weighs 51 lb uses 20950 mAh cells Unger 18 motor also uses 1612 Ah cells Char lie Sylvias Electric fleet shown behind Bud Chappel Sport Scale China Clipper fame built Ford Trimotor four beautiful models brought South Shore Electric Fly uses 18 800-mAh cells power three Mabuchi 05-size motors Its 5/ lb flies 680 sq wing area December 1985 51 Brian Bailies Cabin Playboy used geared Astro cobalt 15 swinging 3-bladed Robbe folding prop 4-cell pack lithium batteries shown taped bottom p lane Pack provides nominal 5 volts 12 amps 20-30 minutes flight time Super battery performance accompanied super battery price too TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals R/O Club Toledo Ohio entire length tape used keep epoxy oozing Out through breaks next step involves cutting fiberglass cloth bridge cracks about two ches either side applying inside fuselage epoxy What epoxy Use epoxy working life least 30 minutes cloth can well-satured smoothed out thor oughly over cracks use fingers finicky builders can use brush epoxy has cured tape outside removed point outside fuselage wont look pretty because cracks will still have uneven surface next step will take care Mix up batch filled epoxy use Sears Filled Epoxy Cement Number 9 80605 tough brittle sands well leaves paintable surface Apply area repair epoxy barely higher un damaged area put pieces mask ing tape over top epoxy help conform surface keep running out area cures epoxy cures remove masking tape low spots enough epoxy applied will necessary just enough used small amount hand-sanding will bring repaired area down perfect match adjacent surfaces other hand too much epoxy applied use sanding block bring Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $4 00 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March repaired area down close other surface finish job light hand-sanding Looks good doesnt couple coats primer sanded between coats will make look better Finish painting should make repaired area nearly indistinguishable way see contest red white black Tiporare challenge tell repaired follow techniques described above can issue challenge like next repair job too Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32S48 RC Electrics/Kopski Continued page 51 ceded Brian Baffle Robbinsville NJ grounds simply could keep up lithium-powered Play boy Yeslithium Ni-Cd Brian has good fortune have ready supply custom-provided oneshot lithium cells energy source has significantly higher energy density nickel-cadmium systems saw no point stacking up 16 1 2-Ah sourced five-lb Cub against him Cub An O-T Yep Peerless offered six-foot Cub 1937 So settled second place fact plenty fun way Im delighted SAM COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED 76 gave Electric try did matter out-technologied O-T Electric event success Well entries did Tex aco event Electric en tries first KRC Elec tric Fly Electrics made up about 15-20% planes flew Initial reaction SAM 76 gonna again next year success betcha buddy initial try Electric O-T drew con siderable interest liquid-fuel crowd feel sure participation will double next year O-T readers others well take example set up Electric event area Keep first simple forget complex rulesand keep fun Thats what hobbys personal Thanks go out SAM 76 congratulations nice job Seuth Shere RC Club Electric Fly Sun day July 21 another hot day calmat least Bridgewater MA site South Shore RC Club fly ing site CD Charlie Sylvia ran clubs First Annual Electric Fly meet 716-mile round trip very much success firstever Electric activity meet patterned after KRC Electric Fly low-key affair awards third Continued page 144 MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/2 inches tall large 10 oz capacity its real attention getter definite collectors piece years come Only Plus $200 postage $695 o handling per ordet CA residents add sales tax REPLACEMENT PARTS FOR Kraft Engines Testori McCoy TaIpen 40 RJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available B JIEROKEE RARE THE REALLY BIG LITTLE AIRPLANE Past AssemblyDesigned intermediate smelt sine 53 Span proportional radios Hardwood Spars Steerable Nose GearVK MODEL Radio MultI-ChiinitelAIRCRAFT CO Symmetrical RoiItap Stab Airfoil 18% Symmetrical 5868 Transit Rd Recommended Engines 2440DoPow NY 14043 Formed Plastic Cowl Wiadabield Includes Wira Parse Nylon Hardware 684-5555 Pull Span Tapered Ailerons Rudder 142 Model Aviation RIL Industries ox 5654 dena CA 91107 Phone 818 359-0016 MULTIPLEX DEALER INQUIRIES INVITED 2001 FM Narrowband RCM L V1ZZZZExcIusive MEMORY SOFT MODULE 14 Ch ROYAL mc! FIight Tested Since 1979 7725 E REDFIELD RD SUITE 105 SCOTTSDALE AIRPARKO SCOTTSDALE ARIZONA 85260 0 PHONE 602 483-9577 place three categories no tooth-and-nail regimen South Shore group club members judge Best Plane Most Aerobatic Longest Flight latter struc tured man-on-man fly Aerobatic judge other AMA District VP Don Krafft addition some surprise prizes farthest traveled largest plane etc 10 participants flew total 22 Electrics sorts day long Some positively beautiful later col umns will present some best photos final results become available again no serious mishaps everyone seemed have great time South Shore group has excellent flying site grounds mediumsecurity penitentiary plenty room around some crops bound ing side spectator area separated pit area wellseparated strip grass well-groomed Electric ROGs rise off-ground easily done Ive spoken CD Charlie since meet tells intends again next year Keep tuned col umn announcement plan attending Im much driv ing such distances one-day meet great time want thank Charlie et al splendid first-time Electric meet Electric supplies trip Bridgewater MA would have happened gracious invitation Dwight Mary Ann Holley Bethel CT stop over way Bethel almost exactly halfway visit delightful indeed Dwight 1982 RC Soaring World Champion took real interest Electric after visiting 1984 KRC Electric Fly participant time Dwight really participant nowhes caught silent flight powered un powered instituted Holleys Silent Flight purpose supplying quiet need absolutely amazed Electric inventory Dwight has amassed just few months Kits motors accesso ries around world Batteries sizes including new 950 mAh size Ill report later column much besides Ive very active Electric 13 years didnt know some stuff existed en courage check out ad issue get copy catalog Youll find wealth suppliesall best isat attractive prices youll find friendly energetic knowledgeable helpful Dwight Holley ready help NowfinallyI have good solid answer letters get lamenting distinct lack Electric supplies knowledge local hobby shops re questing get information Write Dwight Charger time switchesagain Wouldnt ya know just finish some discussion charger time switches last col umn October 1985 proclaiming reli able trouble-free areand now hear theres rash sticky timers out lately Good griefsmoked batteries suggest reread last months column check out timer new charger number dry runs bench Both major Electric manufactur ers country use quality timers major supplier ordinarily work just great So may have exercise warranty dont also shout Electric providersthey try hard good job Its just sometimes have problems too Maybe timer gears made Monday someone tough weekend Anyway please assure yourself costly batteries jeopar dy watch new charger timer before trust its own Basic Electricity last installment seemingly never-ending short course discussed multimetersin particular voltmeter part saw basic Continued page 146 RA MFG OF NI-STARTER L NI STARTER revolutronary concep model engines used boats cars airplanes NI STARTERITMI uses HeadlockITMI adapter locks onto glow plugs stars yosr engine Fits yoar pocket comes CItO charger has LED lights op charging Rechargeable hundreds ot times gives over 50 consecutive starts recharging Available charger Send ad along prepayment receive free shipping handling $2495 charger NI-STARTER$2495 charger Itt OV 220V t 2V taut chargerl NI-STARTER$1 595 charger Chargers$1 295 charger tOV 22tV 12V fast churgerl PLEASE SPECIFY WHICH CHARGER WHEN ORDERING 12421 RANSOM DRIVE GLENN DALE MD 20769301464-2260 144 Model Aviation r ATTENTION ERS EPOXY GLASS COWLS FOR NOSES PICA 50 MOROAN BALSA USA PLATT CONCEPT FLEET HOSTETLER RCM TCRAFr SHEBER PIUS CALE SUPEe CUS FOIcKEe 07 BOEING Pt2 P25 F4B2 PHBH SPARROW HAWK GEE BEE MOO Y MACBRIENS TUReULENT CHeISTEN EAOLE BRISIOHELLAS STARDUSTES II E J3Bt BABY FLYRAeY S OTHE RS WHEEL PANTS FOR CITAeeIA STAROUSTER II PIUS SKYeOLT LieceTy SPORT CHRISTEN EAOLE PeE HAWK MULLIGAN & OTHERS LARGE SCALE PLANS AVAILABLE Please send $100 tar complete list supply Modelers fiberglass parts plans Write call us T & D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN CITY Ml 45535 PHONE 313 421-6358 BRAZED S HEAT-TREATED WIRE GEARS & CABANES PHONE 313 261-9064 DGA DESIGNS Body Pilot Kit sLightest Pilot available eLifeilke vinyl la tex rubber parts 0 Easy assemble finish eBuild either barnstormer sportsman pilot sKit contains pilot head hands boots helmet cap goggles full templates easy instructions eFuily positionable & moveable eSome simple sewing required WeightPrice 1/6 Scale2 oz$ 795 1/4 Scale4 oz$ 995 1/3 Scale6 oz$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4Scale 1Soz 1/3Scale 225 oz Price 595 795 $1 495 Lightest bust pilot available oLifelike vinyl latex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 fer current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks tor check clearSorry-No COD s hI1wu ml 1LCj1~ meter movementa very sensitive device itselfis combined selection external resistors series make dial read several voltage ranges switch-selectable resistors known multipliers effect scale meter face different fullrange values voltage Using 25-volt scale meter well-suited read terminal voltage single Ni-Cd flashlight cell Selecting 50-volt range meter well-suited check charg ing voltage new 20-cell aerobatic motor battery just installed Such idea behind multimetermany useful meter scales box However addition multime ters include several functions Typically offer current ammeter resis tance ohmmeter functions addition voltage function already discussed Just several voltage ranges offered also have several current resis tance ranges Some multimeters use combination switches select func tions scales some use array different test-probe jacks accomplish same thing latter case just plug test leads appropriatelymarked jacks Current ranges scaled vari ous range values withyou guessed resistors theres big differ ence between multipliers used scale voltage ranges shunts used scale current ranges Youll recall multipliers very large resistance valuemany thousands millions ohms shunts typically low values resistance hundreds ohms downward fractions ohms does work Youll recall earlier installments Basic Electricity typical basic meter movement found within multimeters requires VERY little current VERY little voltage deflect full scale meter movement verylow-voltage meter and/or very-lowcurrent meter its owndepending choose view Thus order measure motor current example AMPERES taken motor must SHUNTED away meter movement known precise way remaining MICROAMPERES flow through movement accurate known frac tion total example motor current may TENS OF THOU SANDS times larger current moves meter needle Thus lowvalue shunt resistors connected direct ly across meter movement terminals parallel connection some circuit current flows through bothdepending relative values resistance Since electricity follows path least resistance current flows through shunt resistor relatively high resistance meter movement passes small current another way view opera146 Model Aviation tion current metersometimes simpler understand having useful meaning other aspects Electric modeling Lets recall again basic meter movement requires very little voltage applied its terminals move full scale typical internal resistance such movements can thousands ohms Remember voltmeters used measure voltage ACROSS something such battery circuit component Keeping mind suppose VERY SMALL resistorsay about 10 milliohms 10 one-thousandths ohm readily represented short piece hookup wire Yes wire has resistance Say now install wire resistor series motor cir cuitsorta like part actual wiring itselfso motor current flows through Lets say example motor draws 10 amps earlier installments miniseries know voltage drop across special low-value resistor/wire caused flowing motor current would VIxR could also written V 10 amps x 10/1000 ohms same V 100/1000 1/10 olt shunt resistor would therefore present voltage its terminals 01 volt 01 volt meter movement con nected across resistor would deflect full scale effect wire shunt 'component' purpose 'sam ple current flowing tiny resulting voltage drop can measured low-voltage voltmeternamely basic meter movement itself meter scale marked 0 10 amps wed have real working 10-amp meter 10-amp range multimeter example numbers used just thatex amples chosen purposes illustration representative ac tual conditions real applications meter movement having couple thousand ohms resistance its own has no significant effect value resistance very-small-value shunt true such cases given example However smaller current-meter rangessay milliam pere areathe value shunt resistor becomes closer value meter movement resistance affects other As special example shunt resistor exactly equal meter movement resistance meter scale value would double since ap plied circuit would divide equally between movement resistance external shunt insight offered above will prove Continued page 148 ProTechTor NFO- EARS BERGERON ENTERPRISES 443 ROBERTA FULLERTON CA 92632 MODEL PRODUCTS 07444 CORPORAT ON PU ha 314 Pmpiu Plains HEAD Copyright 1977 MPG P R 0 F E S S I_____ 0 N L LOCK ghs ese ed DONT GET KLIPPED GET U iSame eau two inga4 NO FORCE o/1L4atLon SL~ Lody 404 tong c04404i0n 4L LL4 3 48 inch ILad -tanda4d glow plug4 cluding BRIDI £NI/A 9LO-DVIL t OS 4 Stto/cL plu6 FOX FIR& BALL TEO-D&VtL 4L0-BLL 2oZ OPS ROSSI 2 SLr $695 IfI veAhI writ 4erce odd SOC useful should want add rangesor capabilityof instru ment such example concerns fact multimeters offer built-in 10 amp range Electric power systems operate currents greater 10 amps Another example concerns use common 20-volt range digital multimeters what really need 40-volt range Later well see deal other special cases using nitty gritty information preceding discussion just What Im doing trying hammer home fact current meters cluding multimeters current range always connected SERIES circuit youre measuring current flow very important distinction voltmeter always con nected ACROSS parallel component voltage being measured Think current meter water-flow meter current water must flow THROUGH measured Since cur rent meters have VERY LOW internal resistance connecting across charged battery example would stantly damage meter activate protective device meter might contain Finally since obvious current meters cause in-circuit drop least some small voltage would prob ably notice slight change motor rpm meter circuit current-meter voltage drop called 'burden~ insertion drop' usually between 01 03 volts full-scale meter deflection similar situation condition voltmeters Voltmeters require small current operation cur rent stolen circuit being measured effect called loading required current normally very smalla battery wouldnt notice wanted measure voltage across component itself has very little current flowing through rob bing could very significant Fortu nately latter condition does occur Electric power circuits because circuit currents high voltmeter effect goes unnoticed effects would very noticeable such circuits receiver other lowpower high-resistance electronic assem blies often must accounted Thus pure sense measure some thing change hope now recognize significance wiring similar losses Electric model power systems Current flowing through wiring connectors fuses switches etc causes voltage lossand consequently motor power loss Later well see evaluate such losses minimize See insight multimeters work can give appreciation things happen power installationsas promised Next month Basic Electricity con tinues such discussions regarding actual use voltage current functions multimeters some insight operation ohmmeter ranges Please forward questions include SASE please author Bob Kopski 25 West End Dr Lans dale PA 19446 RC Old-Timers/Mathews Continued page 53 reproductions same engines has little surge interest letters also make painfully obvious writers have strong interest using Bill Schmidts igni tion system totally lack capability building circuit drawings Joe Klaus has come rescue Kustom Kraftsmanship operation will soon make available completely assem bled potted circuit board unit reasonable cost Now abso lutely reason either buy repro engine ranging John Morrells little Atom MG Products Forster 99 pick up ignition timer parts old engine youve lying around years Micro Model Engineering Kustom Kraftsmanships address PO Box 2699 Laguna Hills CA 92654 Telephone 714/830-5162 Micro Model Engineerings address 1301 W Lafayette St Sturgis MI 49091 Telephone 616/651-5431 Flash Ohlsson engines dominate Colusa CA contest Contestants flying models powered Ohlsson 60 ignition engines won three firsts second Only 1AA Texaco big Texaco events won other engines Ohlsson sec ond big Texaco antique brute power name game Ohlsson 60-pow ered model outdid challenges cluding several Schnuerle glow-powered entries spite longer allowed motor runs glow brutes due heavier models about Caveat emptor Thats Latin term mean ing buyer beware have examined several previously-mentioned reproduction engines recently part exhibit excellent work manship run well sometimes better originals did matter fact least two examples absolutely subpar both workmanship materi als Ill name since two ex amples might have exceptions rule shaft running downhill case bolts holding front housing ran off-center holes castings must have finished Continued page 150 148 Model Aviation GLOW PLUG CONNECTOR WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9875053 three swipes coarse file other popped crank pin after third run came cast spinner out-of-round naked eye could see point . buy reproductions approval clear understanding what guarantees Most manufacturers importers doing excellent work wont hesi tate assure buyer quality prod uct refusedont buy Dee B Mathews 8420 Nantucket Wichita KS 67212 RC Giant Scale/Beckman Continued page 55 years ago flying full-scale homebuilt replica Sopwith Triplane through generosity permitted STARS use own private full-scale landing strip clubs base operations has generously continued permission Carolyn Clapp widow mayor common council city Olean have graciously permitted local Municipal Airport closed full-scale aircraft during two-day Ral ly used exclusively Radio Con trol Scale event STARS Scale Rallies have existed concept must held Sunday fliers bulk model air craft participants no competi tion whatsoever no so-called landing registration fee Just come fly fact register ship display and/or fly given ticket free barbecue chicken dinner Scale ships order day size has never challengedlarge Giant Scale smaller Scale always welcome Though event has become associated Giant Scale basically trueany size welcome providing scale Saturday July 6 started off cool day moderate wind completely over cast sky seemed threaten rain moment did deter registrants Two flight lines set up hard-surfaced main runway airport used eight fliers time six fliers air almost con tinuously carefully-coordinated event flying went along hitch Three ducted-fan models flown superb Helicopter demonstration well 1984 total 124 regis trants two-day event noon Saturday 1985 Rally 118 registrants close ac tivities first day total 144 registrantsthe largest ever approximately 330 pm rains camebucket after bucket full very short time stopped completely flying resumed once again large scale rained another 10 minutes 200 chicken barbecue din ners being cooked would have wiped out As charcoal pits regained heat dinner served about half hour later usual After conclusion flying day STARS held its first model aircraft auction hesitancy some cluding thought might adding already overworked program activities Graciously Frank Anderson Mississauga Ontario former MAAC president offered auctioneer Within relatively short period time Frank everything auctioned off ap pears model aircraft auction will now standard portion annual Scale Rally usual Saturday evening social took placea large bonfire food beverages available fliers families camped Municipal Airport Sunday dawned cool completely over cast intermittent persistent drizzle Flying limited brave souls just wanted fly time spite inclement weather five registrants Sunday morning making grand total 149again largest ever would have registered two full TItn1jq b#wS Save tII8to~001 St Is. @ Tlnlef S pointS afl 150 Model Aviation RC VIDEO. GAZINE PES. Continued page 152 FAI RUBBER Sizes 1/4 3116 1/8 3/32 1/16 042 thick pound box Price $1300 FREE 4 oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits incH Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig ft KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAl Model Supply Ignition Engine Parts Only Over 450 Items Send $200 current catalog PO sox 3557 TORRANCE CA 00510
Edition: Model Aviation - 1985/12
Page Numbers: 50, 51, 142, 144, 146, 148, 150
Electrics Bob Kopski ELECTRIC ACTIVITIES summer distinctly different summers past Folks around part East have opportunity visit par ticipate several organized Electric events year thats different KRC Electric Fly no longer game town Lets take brief look two such meets just past SAM 76 Electric event two weeks since annual SAM 76 Old-Timer meet Hatfield PA year group ran first-ever Electric event along regular O-T gas categories July 14 very hot very windy lat ter did tend think reduce total amount flyingthere several Electric gas planes brought out cars day Electric event drew four entries onto field four battled out among themselvesand against persuasive steady wind no crashes 50 Model Aviation Herb Dirks flew Leisure-powered Cabin Playboy 1985 SAM 76 OldTimer meet CD allowed hand-launch es because steady high wind Herb maxed flight took third Electric event Part large electric inventory Holleys Silent Flight Bethel CT Larger inventory enthusiasm Electric shared Dwight Mary Ann Holley also have RC Sailplane kitsand very model Dwight used capture 1982 World Champion title Bob praises Etude kit sitting table everyone seemed enjoy low-key fun typical particular O-T affair end no losers win ners went home prizes provided John Pond Plans Service Leisure Elec tronics Sonictronics SAM 76 Electric event simple rules CD Contest Director established 12-minute max conditions everyone could fly out charge two attempts four entries two made consecutive maxes two went again Results mazes still tie first place CD decreed unlim ited flyoff point yours truly conContinued page 142 Somewhere photo Sigrid Rich ters Alex Richters Klemm L-25d seen South Shore Electric fly Weighs 51 lb uses 20950 mAh cells Unger 18 motor also uses 1612 Ah cells Char lie Sylvias Electric fleet shown behind Bud Chappel Sport Scale China Clipper fame built Ford Trimotor four beautiful models brought South Shore Electric Fly uses 18 800-mAh cells power three Mabuchi 05-size motors Its 5/ lb flies 680 sq wing area December 1985 51 Brian Bailies Cabin Playboy used geared Astro cobalt 15 swinging 3-bladed Robbe folding prop 4-cell pack lithium batteries shown taped bottom p lane Pack provides nominal 5 volts 12 amps 20-30 minutes flight time Super battery performance accompanied super battery price too TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals R/O Club Toledo Ohio entire length tape used keep epoxy oozing Out through breaks next step involves cutting fiberglass cloth bridge cracks about two ches either side applying inside fuselage epoxy What epoxy Use epoxy working life least 30 minutes cloth can well-satured smoothed out thor oughly over cracks use fingers finicky builders can use brush epoxy has cured tape outside removed point outside fuselage wont look pretty because cracks will still have uneven surface next step will take care Mix up batch filled epoxy use Sears Filled Epoxy Cement Number 9 80605 tough brittle sands well leaves paintable surface Apply area repair epoxy barely higher un damaged area put pieces mask ing tape over top epoxy help conform surface keep running out area cures epoxy cures remove masking tape low spots enough epoxy applied will necessary just enough used small amount hand-sanding will bring repaired area down perfect match adjacent surfaces other hand too much epoxy applied use sanding block bring Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $4 00 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March repaired area down close other surface finish job light hand-sanding Looks good doesnt couple coats primer sanded between coats will make look better Finish painting should make repaired area nearly indistinguishable way see contest red white black Tiporare challenge tell repaired follow techniques described above can issue challenge like next repair job too Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32S48 RC Electrics/Kopski Continued page 51 ceded Brian Baffle Robbinsville NJ grounds simply could keep up lithium-powered Play boy Yeslithium Ni-Cd Brian has good fortune have ready supply custom-provided oneshot lithium cells energy source has significantly higher energy density nickel-cadmium systems saw no point stacking up 16 1 2-Ah sourced five-lb Cub against him Cub An O-T Yep Peerless offered six-foot Cub 1937 So settled second place fact plenty fun way Im delighted SAM COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED 76 gave Electric try did matter out-technologied O-T Electric event success Well entries did Tex aco event Electric en tries first KRC Elec tric Fly Electrics made up about 15-20% planes flew Initial reaction SAM 76 gonna again next year success betcha buddy initial try Electric O-T drew con siderable interest liquid-fuel crowd feel sure participation will double next year O-T readers others well take example set up Electric event area Keep first simple forget complex rulesand keep fun Thats what hobbys personal Thanks go out SAM 76 congratulations nice job Seuth Shere RC Club Electric Fly Sun day July 21 another hot day calmat least Bridgewater MA site South Shore RC Club fly ing site CD Charlie Sylvia ran clubs First Annual Electric Fly meet 716-mile round trip very much success firstever Electric activity meet patterned after KRC Electric Fly low-key affair awards third Continued page 144 MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/2 inches tall large 10 oz capacity its real attention getter definite collectors piece years come Only Plus $200 postage $695 o handling per ordet CA residents add sales tax REPLACEMENT PARTS FOR Kraft Engines Testori McCoy TaIpen 40 RJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available B JIEROKEE RARE THE REALLY BIG LITTLE AIRPLANE Past AssemblyDesigned intermediate smelt sine 53 Span proportional radios Hardwood Spars Steerable Nose GearVK MODEL Radio MultI-ChiinitelAIRCRAFT CO Symmetrical RoiItap Stab Airfoil 18% Symmetrical 5868 Transit Rd Recommended Engines 2440DoPow NY 14043 Formed Plastic Cowl Wiadabield Includes Wira Parse Nylon Hardware 684-5555 Pull Span Tapered Ailerons Rudder 142 Model Aviation RIL Industries ox 5654 dena CA 91107 Phone 818 359-0016 MULTIPLEX DEALER INQUIRIES INVITED 2001 FM Narrowband RCM L V1ZZZZExcIusive MEMORY SOFT MODULE 14 Ch ROYAL mc! FIight Tested Since 1979 7725 E REDFIELD RD SUITE 105 SCOTTSDALE AIRPARKO SCOTTSDALE ARIZONA 85260 0 PHONE 602 483-9577 place three categories no tooth-and-nail regimen South Shore group club members judge Best Plane Most Aerobatic Longest Flight latter struc tured man-on-man fly Aerobatic judge other AMA District VP Don Krafft addition some surprise prizes farthest traveled largest plane etc 10 participants flew total 22 Electrics sorts day long Some positively beautiful later col umns will present some best photos final results become available again no serious mishaps everyone seemed have great time South Shore group has excellent flying site grounds mediumsecurity penitentiary plenty room around some crops bound ing side spectator area separated pit area wellseparated strip grass well-groomed Electric ROGs rise off-ground easily done Ive spoken CD Charlie since meet tells intends again next year Keep tuned col umn announcement plan attending Im much driv ing such distances one-day meet great time want thank Charlie et al splendid first-time Electric meet Electric supplies trip Bridgewater MA would have happened gracious invitation Dwight Mary Ann Holley Bethel CT stop over way Bethel almost exactly halfway visit delightful indeed Dwight 1982 RC Soaring World Champion took real interest Electric after visiting 1984 KRC Electric Fly participant time Dwight really participant nowhes caught silent flight powered un powered instituted Holleys Silent Flight purpose supplying quiet need absolutely amazed Electric inventory Dwight has amassed just few months Kits motors accesso ries around world Batteries sizes including new 950 mAh size Ill report later column much besides Ive very active Electric 13 years didnt know some stuff existed en courage check out ad issue get copy catalog Youll find wealth suppliesall best isat attractive prices youll find friendly energetic knowledgeable helpful Dwight Holley ready help NowfinallyI have good solid answer letters get lamenting distinct lack Electric supplies knowledge local hobby shops re questing get information Write Dwight Charger time switchesagain Wouldnt ya know just finish some discussion charger time switches last col umn October 1985 proclaiming reli able trouble-free areand now hear theres rash sticky timers out lately Good griefsmoked batteries suggest reread last months column check out timer new charger number dry runs bench Both major Electric manufactur ers country use quality timers major supplier ordinarily work just great So may have exercise warranty dont also shout Electric providersthey try hard good job Its just sometimes have problems too Maybe timer gears made Monday someone tough weekend Anyway please assure yourself costly batteries jeopar dy watch new charger timer before trust its own Basic Electricity last installment seemingly never-ending short course discussed multimetersin particular voltmeter part saw basic Continued page 146 RA MFG OF NI-STARTER L NI STARTER revolutronary concep model engines used boats cars airplanes NI STARTERITMI uses HeadlockITMI adapter locks onto glow plugs stars yosr engine Fits yoar pocket comes CItO charger has LED lights op charging Rechargeable hundreds ot times gives over 50 consecutive starts recharging Available charger Send ad along prepayment receive free shipping handling $2495 charger NI-STARTER$2495 charger Itt OV 220V t 2V taut chargerl NI-STARTER$1 595 charger Chargers$1 295 charger tOV 22tV 12V fast churgerl PLEASE SPECIFY WHICH CHARGER WHEN ORDERING 12421 RANSOM DRIVE GLENN DALE MD 20769301464-2260 144 Model Aviation r ATTENTION ERS EPOXY GLASS COWLS FOR NOSES PICA 50 MOROAN BALSA USA PLATT CONCEPT FLEET HOSTETLER RCM TCRAFr SHEBER PIUS CALE SUPEe CUS FOIcKEe 07 BOEING Pt2 P25 F4B2 PHBH SPARROW HAWK GEE BEE MOO Y MACBRIENS TUReULENT CHeISTEN EAOLE BRISIOHELLAS STARDUSTES II E J3Bt BABY FLYRAeY S OTHE RS WHEEL PANTS FOR CITAeeIA STAROUSTER II PIUS SKYeOLT LieceTy SPORT CHRISTEN EAOLE PeE HAWK MULLIGAN & OTHERS LARGE SCALE PLANS AVAILABLE Please send $100 tar complete list supply Modelers fiberglass parts plans Write call us T & D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN CITY Ml 45535 PHONE 313 421-6358 BRAZED S HEAT-TREATED WIRE GEARS & CABANES PHONE 313 261-9064 DGA DESIGNS Body Pilot Kit sLightest Pilot available eLifeilke vinyl la tex rubber parts 0 Easy assemble finish eBuild either barnstormer sportsman pilot sKit contains pilot head hands boots helmet cap goggles full templates easy instructions eFuily positionable & moveable eSome simple sewing required WeightPrice 1/6 Scale2 oz$ 795 1/4 Scale4 oz$ 995 1/3 Scale6 oz$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4Scale 1Soz 1/3Scale 225 oz Price 595 795 $1 495 Lightest bust pilot available oLifelike vinyl latex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 fer current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks tor check clearSorry-No COD s hI1wu ml 1LCj1~ meter movementa very sensitive device itselfis combined selection external resistors series make dial read several voltage ranges switch-selectable resistors known multipliers effect scale meter face different fullrange values voltage Using 25-volt scale meter well-suited read terminal voltage single Ni-Cd flashlight cell Selecting 50-volt range meter well-suited check charg ing voltage new 20-cell aerobatic motor battery just installed Such idea behind multimetermany useful meter scales box However addition multime ters include several functions Typically offer current ammeter resis tance ohmmeter functions addition voltage function already discussed Just several voltage ranges offered also have several current resis tance ranges Some multimeters use combination switches select func tions scales some use array different test-probe jacks accomplish same thing latter case just plug test leads appropriatelymarked jacks Current ranges scaled vari ous range values withyou guessed resistors theres big differ ence between multipliers used scale voltage ranges shunts used scale current ranges Youll recall multipliers very large resistance valuemany thousands millions ohms shunts typically low values resistance hundreds ohms downward fractions ohms does work Youll recall earlier installments Basic Electricity typical basic meter movement found within multimeters requires VERY little current VERY little voltage deflect full scale meter movement verylow-voltage meter and/or very-lowcurrent meter its owndepending choose view Thus order measure motor current example AMPERES taken motor must SHUNTED away meter movement known precise way remaining MICROAMPERES flow through movement accurate known frac tion total example motor current may TENS OF THOU SANDS times larger current moves meter needle Thus lowvalue shunt resistors connected direct ly across meter movement terminals parallel connection some circuit current flows through bothdepending relative values resistance Since electricity follows path least resistance current flows through shunt resistor relatively high resistance meter movement passes small current another way view opera146 Model Aviation tion current metersometimes simpler understand having useful meaning other aspects Electric modeling Lets recall again basic meter movement requires very little voltage applied its terminals move full scale typical internal resistance such movements can thousands ohms Remember voltmeters used measure voltage ACROSS something such battery circuit component Keeping mind suppose VERY SMALL resistorsay about 10 milliohms 10 one-thousandths ohm readily represented short piece hookup wire Yes wire has resistance Say now install wire resistor series motor cir cuitsorta like part actual wiring itselfso motor current flows through Lets say example motor draws 10 amps earlier installments miniseries know voltage drop across special low-value resistor/wire caused flowing motor current would VIxR could also written V 10 amps x 10/1000 ohms same V 100/1000 1/10 olt shunt resistor would therefore present voltage its terminals 01 volt 01 volt meter movement con nected across resistor would deflect full scale effect wire shunt 'component' purpose 'sam ple current flowing tiny resulting voltage drop can measured low-voltage voltmeternamely basic meter movement itself meter scale marked 0 10 amps wed have real working 10-amp meter 10-amp range multimeter example numbers used just thatex amples chosen purposes illustration representative ac tual conditions real applications meter movement having couple thousand ohms resistance its own has no significant effect value resistance very-small-value shunt true such cases given example However smaller current-meter rangessay milliam pere areathe value shunt resistor becomes closer value meter movement resistance affects other As special example shunt resistor exactly equal meter movement resistance meter scale value would double since ap plied circuit would divide equally between movement resistance external shunt insight offered above will prove Continued page 148 ProTechTor NFO- EARS BERGERON ENTERPRISES 443 ROBERTA FULLERTON CA 92632 MODEL PRODUCTS 07444 CORPORAT ON PU ha 314 Pmpiu Plains HEAD Copyright 1977 MPG P R 0 F E S S I_____ 0 N L LOCK ghs ese ed DONT GET KLIPPED GET U iSame eau two inga4 NO FORCE o/1L4atLon SL~ Lody 404 tong c04404i0n 4L LL4 3 48 inch ILad -tanda4d glow plug4 cluding BRIDI £NI/A 9LO-DVIL t OS 4 Stto/cL plu6 FOX FIR& BALL TEO-D&VtL 4L0-BLL 2oZ OPS ROSSI 2 SLr $695 IfI veAhI writ 4erce odd SOC useful should want add rangesor capabilityof instru ment such example concerns fact multimeters offer built-in 10 amp range Electric power systems operate currents greater 10 amps Another example concerns use common 20-volt range digital multimeters what really need 40-volt range Later well see deal other special cases using nitty gritty information preceding discussion just What Im doing trying hammer home fact current meters cluding multimeters current range always connected SERIES circuit youre measuring current flow very important distinction voltmeter always con nected ACROSS parallel component voltage being measured Think current meter water-flow meter current water must flow THROUGH measured Since cur rent meters have VERY LOW internal resistance connecting across charged battery example would stantly damage meter activate protective device meter might contain Finally since obvious current meters cause in-circuit drop least some small voltage would prob ably notice slight change motor rpm meter circuit current-meter voltage drop called 'burden~ insertion drop' usually between 01 03 volts full-scale meter deflection similar situation condition voltmeters Voltmeters require small current operation cur rent stolen circuit being measured effect called loading required current normally very smalla battery wouldnt notice wanted measure voltage across component itself has very little current flowing through rob bing could very significant Fortu nately latter condition does occur Electric power circuits because circuit currents high voltmeter effect goes unnoticed effects would very noticeable such circuits receiver other lowpower high-resistance electronic assem blies often must accounted Thus pure sense measure some thing change hope now recognize significance wiring similar losses Electric model power systems Current flowing through wiring connectors fuses switches etc causes voltage lossand consequently motor power loss Later well see evaluate such losses minimize See insight multimeters work can give appreciation things happen power installationsas promised Next month Basic Electricity con tinues such discussions regarding actual use voltage current functions multimeters some insight operation ohmmeter ranges Please forward questions include SASE please author Bob Kopski 25 West End Dr Lans dale PA 19446 RC Old-Timers/Mathews Continued page 53 reproductions same engines has little surge interest letters also make painfully obvious writers have strong interest using Bill Schmidts igni tion system totally lack capability building circuit drawings Joe Klaus has come rescue Kustom Kraftsmanship operation will soon make available completely assem bled potted circuit board unit reasonable cost Now abso lutely reason either buy repro engine ranging John Morrells little Atom MG Products Forster 99 pick up ignition timer parts old engine youve lying around years Micro Model Engineering Kustom Kraftsmanships address PO Box 2699 Laguna Hills CA 92654 Telephone 714/830-5162 Micro Model Engineerings address 1301 W Lafayette St Sturgis MI 49091 Telephone 616/651-5431 Flash Ohlsson engines dominate Colusa CA contest Contestants flying models powered Ohlsson 60 ignition engines won three firsts second Only 1AA Texaco big Texaco events won other engines Ohlsson sec ond big Texaco antique brute power name game Ohlsson 60-pow ered model outdid challenges cluding several Schnuerle glow-powered entries spite longer allowed motor runs glow brutes due heavier models about Caveat emptor Thats Latin term mean ing buyer beware have examined several previously-mentioned reproduction engines recently part exhibit excellent work manship run well sometimes better originals did matter fact least two examples absolutely subpar both workmanship materi als Ill name since two ex amples might have exceptions rule shaft running downhill case bolts holding front housing ran off-center holes castings must have finished Continued page 150 148 Model Aviation GLOW PLUG CONNECTOR WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9875053 three swipes coarse file other popped crank pin after third run came cast spinner out-of-round naked eye could see point . buy reproductions approval clear understanding what guarantees Most manufacturers importers doing excellent work wont hesi tate assure buyer quality prod uct refusedont buy Dee B Mathews 8420 Nantucket Wichita KS 67212 RC Giant Scale/Beckman Continued page 55 years ago flying full-scale homebuilt replica Sopwith Triplane through generosity permitted STARS use own private full-scale landing strip clubs base operations has generously continued permission Carolyn Clapp widow mayor common council city Olean have graciously permitted local Municipal Airport closed full-scale aircraft during two-day Ral ly used exclusively Radio Con trol Scale event STARS Scale Rallies have existed concept must held Sunday fliers bulk model air craft participants no competi tion whatsoever no so-called landing registration fee Just come fly fact register ship display and/or fly given ticket free barbecue chicken dinner Scale ships order day size has never challengedlarge Giant Scale smaller Scale always welcome Though event has become associated Giant Scale basically trueany size welcome providing scale Saturday July 6 started off cool day moderate wind completely over cast sky seemed threaten rain moment did deter registrants Two flight lines set up hard-surfaced main runway airport used eight fliers time six fliers air almost con tinuously carefully-coordinated event flying went along hitch Three ducted-fan models flown superb Helicopter demonstration well 1984 total 124 regis trants two-day event noon Saturday 1985 Rally 118 registrants close ac tivities first day total 144 registrantsthe largest ever approximately 330 pm rains camebucket after bucket full very short time stopped completely flying resumed once again large scale rained another 10 minutes 200 chicken barbecue din ners being cooked would have wiped out As charcoal pits regained heat dinner served about half hour later usual After conclusion flying day STARS held its first model aircraft auction hesitancy some cluding thought might adding already overworked program activities Graciously Frank Anderson Mississauga Ontario former MAAC president offered auctioneer Within relatively short period time Frank everything auctioned off ap pears model aircraft auction will now standard portion annual Scale Rally usual Saturday evening social took placea large bonfire food beverages available fliers families camped Municipal Airport Sunday dawned cool completely over cast intermittent persistent drizzle Flying limited brave souls just wanted fly time spite inclement weather five registrants Sunday morning making grand total 149again largest ever would have registered two full TItn1jq b#wS Save tII8to~001 St Is. @ Tlnlef S pointS afl 150 Model Aviation RC VIDEO. GAZINE PES. Continued page 152 FAI RUBBER Sizes 1/4 3116 1/8 3/32 1/16 042 thick pound box Price $1300 FREE 4 oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits incH Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig ft KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAl Model Supply Ignition Engine Parts Only Over 450 Items Send $200 current catalog PO sox 3557 TORRANCE CA 00510
Edition: Model Aviation - 1985/12
Page Numbers: 50, 51, 142, 144, 146, 148, 150
Electrics Bob Kopski ELECTRIC ACTIVITIES summer distinctly different summers past Folks around part East have opportunity visit par ticipate several organized Electric events year thats different KRC Electric Fly no longer game town Lets take brief look two such meets just past SAM 76 Electric event two weeks since annual SAM 76 Old-Timer meet Hatfield PA year group ran first-ever Electric event along regular O-T gas categories July 14 very hot very windy lat ter did tend think reduce total amount flyingthere several Electric gas planes brought out cars day Electric event drew four entries onto field four battled out among themselvesand against persuasive steady wind no crashes 50 Model Aviation Herb Dirks flew Leisure-powered Cabin Playboy 1985 SAM 76 OldTimer meet CD allowed hand-launch es because steady high wind Herb maxed flight took third Electric event Part large electric inventory Holleys Silent Flight Bethel CT Larger inventory enthusiasm Electric shared Dwight Mary Ann Holley also have RC Sailplane kitsand very model Dwight used capture 1982 World Champion title Bob praises Etude kit sitting table everyone seemed enjoy low-key fun typical particular O-T affair end no losers win ners went home prizes provided John Pond Plans Service Leisure Elec tronics Sonictronics SAM 76 Electric event simple rules CD Contest Director established 12-minute max conditions everyone could fly out charge two attempts four entries two made consecutive maxes two went again Results mazes still tie first place CD decreed unlim ited flyoff point yours truly conContinued page 142 Somewhere photo Sigrid Rich ters Alex Richters Klemm L-25d seen South Shore Electric fly Weighs 51 lb uses 20950 mAh cells Unger 18 motor also uses 1612 Ah cells Char lie Sylvias Electric fleet shown behind Bud Chappel Sport Scale China Clipper fame built Ford Trimotor four beautiful models brought South Shore Electric Fly uses 18 800-mAh cells power three Mabuchi 05-size motors Its 5/ lb flies 680 sq wing area December 1985 51 Brian Bailies Cabin Playboy used geared Astro cobalt 15 swinging 3-bladed Robbe folding prop 4-cell pack lithium batteries shown taped bottom p lane Pack provides nominal 5 volts 12 amps 20-30 minutes flight time Super battery performance accompanied super battery price too TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals R/O Club Toledo Ohio entire length tape used keep epoxy oozing Out through breaks next step involves cutting fiberglass cloth bridge cracks about two ches either side applying inside fuselage epoxy What epoxy Use epoxy working life least 30 minutes cloth can well-satured smoothed out thor oughly over cracks use fingers finicky builders can use brush epoxy has cured tape outside removed point outside fuselage wont look pretty because cracks will still have uneven surface next step will take care Mix up batch filled epoxy use Sears Filled Epoxy Cement Number 9 80605 tough brittle sands well leaves paintable surface Apply area repair epoxy barely higher un damaged area put pieces mask ing tape over top epoxy help conform surface keep running out area cures epoxy cures remove masking tape low spots enough epoxy applied will necessary just enough used small amount hand-sanding will bring repaired area down perfect match adjacent surfaces other hand too much epoxy applied use sanding block bring Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $4 00 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March repaired area down close other surface finish job light hand-sanding Looks good doesnt couple coats primer sanded between coats will make look better Finish painting should make repaired area nearly indistinguishable way see contest red white black Tiporare challenge tell repaired follow techniques described above can issue challenge like next repair job too Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32S48 RC Electrics/Kopski Continued page 51 ceded Brian Baffle Robbinsville NJ grounds simply could keep up lithium-powered Play boy Yeslithium Ni-Cd Brian has good fortune have ready supply custom-provided oneshot lithium cells energy source has significantly higher energy density nickel-cadmium systems saw no point stacking up 16 1 2-Ah sourced five-lb Cub against him Cub An O-T Yep Peerless offered six-foot Cub 1937 So settled second place fact plenty fun way Im delighted SAM COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED 76 gave Electric try did matter out-technologied O-T Electric event success Well entries did Tex aco event Electric en tries first KRC Elec tric Fly Electrics made up about 15-20% planes flew Initial reaction SAM 76 gonna again next year success betcha buddy initial try Electric O-T drew con siderable interest liquid-fuel crowd feel sure participation will double next year O-T readers others well take example set up Electric event area Keep first simple forget complex rulesand keep fun Thats what hobbys personal Thanks go out SAM 76 congratulations nice job Seuth Shere RC Club Electric Fly Sun day July 21 another hot day calmat least Bridgewater MA site South Shore RC Club fly ing site CD Charlie Sylvia ran clubs First Annual Electric Fly meet 716-mile round trip very much success firstever Electric activity meet patterned after KRC Electric Fly low-key affair awards third Continued page 144 MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/2 inches tall large 10 oz capacity its real attention getter definite collectors piece years come Only Plus $200 postage $695 o handling per ordet CA residents add sales tax REPLACEMENT PARTS FOR Kraft Engines Testori McCoy TaIpen 40 RJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available B JIEROKEE RARE THE REALLY BIG LITTLE AIRPLANE Past AssemblyDesigned intermediate smelt sine 53 Span proportional radios Hardwood Spars Steerable Nose GearVK MODEL Radio MultI-ChiinitelAIRCRAFT CO Symmetrical RoiItap Stab Airfoil 18% Symmetrical 5868 Transit Rd Recommended Engines 2440DoPow NY 14043 Formed Plastic Cowl Wiadabield Includes Wira Parse Nylon Hardware 684-5555 Pull Span Tapered Ailerons Rudder 142 Model Aviation RIL Industries ox 5654 dena CA 91107 Phone 818 359-0016 MULTIPLEX DEALER INQUIRIES INVITED 2001 FM Narrowband RCM L V1ZZZZExcIusive MEMORY SOFT MODULE 14 Ch ROYAL mc! FIight Tested Since 1979 7725 E REDFIELD RD SUITE 105 SCOTTSDALE AIRPARKO SCOTTSDALE ARIZONA 85260 0 PHONE 602 483-9577 place three categories no tooth-and-nail regimen South Shore group club members judge Best Plane Most Aerobatic Longest Flight latter struc tured man-on-man fly Aerobatic judge other AMA District VP Don Krafft addition some surprise prizes farthest traveled largest plane etc 10 participants flew total 22 Electrics sorts day long Some positively beautiful later col umns will present some best photos final results become available again no serious mishaps everyone seemed have great time South Shore group has excellent flying site grounds mediumsecurity penitentiary plenty room around some crops bound ing side spectator area separated pit area wellseparated strip grass well-groomed Electric ROGs rise off-ground easily done Ive spoken CD Charlie since meet tells intends again next year Keep tuned col umn announcement plan attending Im much driv ing such distances one-day meet great time want thank Charlie et al splendid first-time Electric meet Electric supplies trip Bridgewater MA would have happened gracious invitation Dwight Mary Ann Holley Bethel CT stop over way Bethel almost exactly halfway visit delightful indeed Dwight 1982 RC Soaring World Champion took real interest Electric after visiting 1984 KRC Electric Fly participant time Dwight really participant nowhes caught silent flight powered un powered instituted Holleys Silent Flight purpose supplying quiet need absolutely amazed Electric inventory Dwight has amassed just few months Kits motors accesso ries around world Batteries sizes including new 950 mAh size Ill report later column much besides Ive very active Electric 13 years didnt know some stuff existed en courage check out ad issue get copy catalog Youll find wealth suppliesall best isat attractive prices youll find friendly energetic knowledgeable helpful Dwight Holley ready help NowfinallyI have good solid answer letters get lamenting distinct lack Electric supplies knowledge local hobby shops re questing get information Write Dwight Charger time switchesagain Wouldnt ya know just finish some discussion charger time switches last col umn October 1985 proclaiming reli able trouble-free areand now hear theres rash sticky timers out lately Good griefsmoked batteries suggest reread last months column check out timer new charger number dry runs bench Both major Electric manufactur ers country use quality timers major supplier ordinarily work just great So may have exercise warranty dont also shout Electric providersthey try hard good job Its just sometimes have problems too Maybe timer gears made Monday someone tough weekend Anyway please assure yourself costly batteries jeopar dy watch new charger timer before trust its own Basic Electricity last installment seemingly never-ending short course discussed multimetersin particular voltmeter part saw basic Continued page 146 RA MFG OF NI-STARTER L NI STARTER revolutronary concep model engines used boats cars airplanes NI STARTERITMI uses HeadlockITMI adapter locks onto glow plugs stars yosr engine Fits yoar pocket comes CItO charger has LED lights op charging Rechargeable hundreds ot times gives over 50 consecutive starts recharging Available charger Send ad along prepayment receive free shipping handling $2495 charger NI-STARTER$2495 charger Itt OV 220V t 2V taut chargerl NI-STARTER$1 595 charger Chargers$1 295 charger tOV 22tV 12V fast churgerl PLEASE SPECIFY WHICH CHARGER WHEN ORDERING 12421 RANSOM DRIVE GLENN DALE MD 20769301464-2260 144 Model Aviation r ATTENTION ERS EPOXY GLASS COWLS FOR NOSES PICA 50 MOROAN BALSA USA PLATT CONCEPT FLEET HOSTETLER RCM TCRAFr SHEBER PIUS CALE SUPEe CUS FOIcKEe 07 BOEING Pt2 P25 F4B2 PHBH SPARROW HAWK GEE BEE MOO Y MACBRIENS TUReULENT CHeISTEN EAOLE BRISIOHELLAS STARDUSTES II E J3Bt BABY FLYRAeY S OTHE RS WHEEL PANTS FOR CITAeeIA STAROUSTER II PIUS SKYeOLT LieceTy SPORT CHRISTEN EAOLE PeE HAWK MULLIGAN & OTHERS LARGE SCALE PLANS AVAILABLE Please send $100 tar complete list supply Modelers fiberglass parts plans Write call us T & D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN CITY Ml 45535 PHONE 313 421-6358 BRAZED S HEAT-TREATED WIRE GEARS & CABANES PHONE 313 261-9064 DGA DESIGNS Body Pilot Kit sLightest Pilot available eLifeilke vinyl la tex rubber parts 0 Easy assemble finish eBuild either barnstormer sportsman pilot sKit contains pilot head hands boots helmet cap goggles full templates easy instructions eFuily positionable & moveable eSome simple sewing required WeightPrice 1/6 Scale2 oz$ 795 1/4 Scale4 oz$ 995 1/3 Scale6 oz$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4Scale 1Soz 1/3Scale 225 oz Price 595 795 $1 495 Lightest bust pilot available oLifelike vinyl latex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 fer current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks tor check clearSorry-No COD s hI1wu ml 1LCj1~ meter movementa very sensitive device itselfis combined selection external resistors series make dial read several voltage ranges switch-selectable resistors known multipliers effect scale meter face different fullrange values voltage Using 25-volt scale meter well-suited read terminal voltage single Ni-Cd flashlight cell Selecting 50-volt range meter well-suited check charg ing voltage new 20-cell aerobatic motor battery just installed Such idea behind multimetermany useful meter scales box However addition multime ters include several functions Typically offer current ammeter resis tance ohmmeter functions addition voltage function already discussed Just several voltage ranges offered also have several current resis tance ranges Some multimeters use combination switches select func tions scales some use array different test-probe jacks accomplish same thing latter case just plug test leads appropriatelymarked jacks Current ranges scaled vari ous range values withyou guessed resistors theres big differ ence between multipliers used scale voltage ranges shunts used scale current ranges Youll recall multipliers very large resistance valuemany thousands millions ohms shunts typically low values resistance hundreds ohms downward fractions ohms does work Youll recall earlier installments Basic Electricity typical basic meter movement found within multimeters requires VERY little current VERY little voltage deflect full scale meter movement verylow-voltage meter and/or very-lowcurrent meter its owndepending choose view Thus order measure motor current example AMPERES taken motor must SHUNTED away meter movement known precise way remaining MICROAMPERES flow through movement accurate known frac tion total example motor current may TENS OF THOU SANDS times larger current moves meter needle Thus lowvalue shunt resistors connected direct ly across meter movement terminals parallel connection some circuit current flows through bothdepending relative values resistance Since electricity follows path least resistance current flows through shunt resistor relatively high resistance meter movement passes small current another way view opera146 Model Aviation tion current metersometimes simpler understand having useful meaning other aspects Electric modeling Lets recall again basic meter movement requires very little voltage applied its terminals move full scale typical internal resistance such movements can thousands ohms Remember voltmeters used measure voltage ACROSS something such battery circuit component Keeping mind suppose VERY SMALL resistorsay about 10 milliohms 10 one-thousandths ohm readily represented short piece hookup wire Yes wire has resistance Say now install wire resistor series motor cir cuitsorta like part actual wiring itselfso motor current flows through Lets say example motor draws 10 amps earlier installments miniseries know voltage drop across special low-value resistor/wire caused flowing motor current would VIxR could also written V 10 amps x 10/1000 ohms same V 100/1000 1/10 olt shunt resistor would therefore present voltage its terminals 01 volt 01 volt meter movement con nected across resistor would deflect full scale effect wire shunt 'component' purpose 'sam ple current flowing tiny resulting voltage drop can measured low-voltage voltmeternamely basic meter movement itself meter scale marked 0 10 amps wed have real working 10-amp meter 10-amp range multimeter example numbers used just thatex amples chosen purposes illustration representative ac tual conditions real applications meter movement having couple thousand ohms resistance its own has no significant effect value resistance very-small-value shunt true such cases given example However smaller current-meter rangessay milliam pere areathe value shunt resistor becomes closer value meter movement resistance affects other As special example shunt resistor exactly equal meter movement resistance meter scale value would double since ap plied circuit would divide equally between movement resistance external shunt insight offered above will prove Continued page 148 ProTechTor NFO- EARS BERGERON ENTERPRISES 443 ROBERTA FULLERTON CA 92632 MODEL PRODUCTS 07444 CORPORAT ON PU ha 314 Pmpiu Plains HEAD Copyright 1977 MPG P R 0 F E S S I_____ 0 N L LOCK ghs ese ed DONT GET KLIPPED GET U iSame eau two inga4 NO FORCE o/1L4atLon SL~ Lody 404 tong c04404i0n 4L LL4 3 48 inch ILad -tanda4d glow plug4 cluding BRIDI £NI/A 9LO-DVIL t OS 4 Stto/cL plu6 FOX FIR& BALL TEO-D&VtL 4L0-BLL 2oZ OPS ROSSI 2 SLr $695 IfI veAhI writ 4erce odd SOC useful should want add rangesor capabilityof instru ment such example concerns fact multimeters offer built-in 10 amp range Electric power systems operate currents greater 10 amps Another example concerns use common 20-volt range digital multimeters what really need 40-volt range Later well see deal other special cases using nitty gritty information preceding discussion just What Im doing trying hammer home fact current meters cluding multimeters current range always connected SERIES circuit youre measuring current flow very important distinction voltmeter always con nected ACROSS parallel component voltage being measured Think current meter water-flow meter current water must flow THROUGH measured Since cur rent meters have VERY LOW internal resistance connecting across charged battery example would stantly damage meter activate protective device meter might contain Finally since obvious current meters cause in-circuit drop least some small voltage would prob ably notice slight change motor rpm meter circuit current-meter voltage drop called 'burden~ insertion drop' usually between 01 03 volts full-scale meter deflection similar situation condition voltmeters Voltmeters require small current operation cur rent stolen circuit being measured effect called loading required current normally very smalla battery wouldnt notice wanted measure voltage across component itself has very little current flowing through rob bing could very significant Fortu nately latter condition does occur Electric power circuits because circuit currents high voltmeter effect goes unnoticed effects would very noticeable such circuits receiver other lowpower high-resistance electronic assem blies often must accounted Thus pure sense measure some thing change hope now recognize significance wiring similar losses Electric model power systems Current flowing through wiring connectors fuses switches etc causes voltage lossand consequently motor power loss Later well see evaluate such losses minimize See insight multimeters work can give appreciation things happen power installationsas promised Next month Basic Electricity con tinues such discussions regarding actual use voltage current functions multimeters some insight operation ohmmeter ranges Please forward questions include SASE please author Bob Kopski 25 West End Dr Lans dale PA 19446 RC Old-Timers/Mathews Continued page 53 reproductions same engines has little surge interest letters also make painfully obvious writers have strong interest using Bill Schmidts igni tion system totally lack capability building circuit drawings Joe Klaus has come rescue Kustom Kraftsmanship operation will soon make available completely assem bled potted circuit board unit reasonable cost Now abso lutely reason either buy repro engine ranging John Morrells little Atom MG Products Forster 99 pick up ignition timer parts old engine youve lying around years Micro Model Engineering Kustom Kraftsmanships address PO Box 2699 Laguna Hills CA 92654 Telephone 714/830-5162 Micro Model Engineerings address 1301 W Lafayette St Sturgis MI 49091 Telephone 616/651-5431 Flash Ohlsson engines dominate Colusa CA contest Contestants flying models powered Ohlsson 60 ignition engines won three firsts second Only 1AA Texaco big Texaco events won other engines Ohlsson sec ond big Texaco antique brute power name game Ohlsson 60-pow ered model outdid challenges cluding several Schnuerle glow-powered entries spite longer allowed motor runs glow brutes due heavier models about Caveat emptor Thats Latin term mean ing buyer beware have examined several previously-mentioned reproduction engines recently part exhibit excellent work manship run well sometimes better originals did matter fact least two examples absolutely subpar both workmanship materi als Ill name since two ex amples might have exceptions rule shaft running downhill case bolts holding front housing ran off-center holes castings must have finished Continued page 150 148 Model Aviation GLOW PLUG CONNECTOR WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9875053 three swipes coarse file other popped crank pin after third run came cast spinner out-of-round naked eye could see point . buy reproductions approval clear understanding what guarantees Most manufacturers importers doing excellent work wont hesi tate assure buyer quality prod uct refusedont buy Dee B Mathews 8420 Nantucket Wichita KS 67212 RC Giant Scale/Beckman Continued page 55 years ago flying full-scale homebuilt replica Sopwith Triplane through generosity permitted STARS use own private full-scale landing strip clubs base operations has generously continued permission Carolyn Clapp widow mayor common council city Olean have graciously permitted local Municipal Airport closed full-scale aircraft during two-day Ral ly used exclusively Radio Con trol Scale event STARS Scale Rallies have existed concept must held Sunday fliers bulk model air craft participants no competi tion whatsoever no so-called landing registration fee Just come fly fact register ship display and/or fly given ticket free barbecue chicken dinner Scale ships order day size has never challengedlarge Giant Scale smaller Scale always welcome Though event has become associated Giant Scale basically trueany size welcome providing scale Saturday July 6 started off cool day moderate wind completely over cast sky seemed threaten rain moment did deter registrants Two flight lines set up hard-surfaced main runway airport used eight fliers time six fliers air almost con tinuously carefully-coordinated event flying went along hitch Three ducted-fan models flown superb Helicopter demonstration well 1984 total 124 regis trants two-day event noon Saturday 1985 Rally 118 registrants close ac tivities first day total 144 registrantsthe largest ever approximately 330 pm rains camebucket after bucket full very short time stopped completely flying resumed once again large scale rained another 10 minutes 200 chicken barbecue din ners being cooked would have wiped out As charcoal pits regained heat dinner served about half hour later usual After conclusion flying day STARS held its first model aircraft auction hesitancy some cluding thought might adding already overworked program activities Graciously Frank Anderson Mississauga Ontario former MAAC president offered auctioneer Within relatively short period time Frank everything auctioned off ap pears model aircraft auction will now standard portion annual Scale Rally usual Saturday evening social took placea large bonfire food beverages available fliers families camped Municipal Airport Sunday dawned cool completely over cast intermittent persistent drizzle Flying limited brave souls just wanted fly time spite inclement weather five registrants Sunday morning making grand total 149again largest ever would have registered two full TItn1jq b#wS Save tII8to~001 St Is. @ Tlnlef S pointS afl 150 Model Aviation RC VIDEO. GAZINE PES. Continued page 152 FAI RUBBER Sizes 1/4 3116 1/8 3/32 1/16 042 thick pound box Price $1300 FREE 4 oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits incH Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig ft KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAl Model Supply Ignition Engine Parts Only Over 450 Items Send $200 current catalog PO sox 3557 TORRANCE CA 00510
Edition: Model Aviation - 1985/12
Page Numbers: 50, 51, 142, 144, 146, 148, 150
Electrics Bob Kopski ELECTRIC ACTIVITIES summer distinctly different summers past Folks around part East have opportunity visit par ticipate several organized Electric events year thats different KRC Electric Fly no longer game town Lets take brief look two such meets just past SAM 76 Electric event two weeks since annual SAM 76 Old-Timer meet Hatfield PA year group ran first-ever Electric event along regular O-T gas categories July 14 very hot very windy lat ter did tend think reduce total amount flyingthere several Electric gas planes brought out cars day Electric event drew four entries onto field four battled out among themselvesand against persuasive steady wind no crashes 50 Model Aviation Herb Dirks flew Leisure-powered Cabin Playboy 1985 SAM 76 OldTimer meet CD allowed hand-launch es because steady high wind Herb maxed flight took third Electric event Part large electric inventory Holleys Silent Flight Bethel CT Larger inventory enthusiasm Electric shared Dwight Mary Ann Holley also have RC Sailplane kitsand very model Dwight used capture 1982 World Champion title Bob praises Etude kit sitting table everyone seemed enjoy low-key fun typical particular O-T affair end no losers win ners went home prizes provided John Pond Plans Service Leisure Elec tronics Sonictronics SAM 76 Electric event simple rules CD Contest Director established 12-minute max conditions everyone could fly out charge two attempts four entries two made consecutive maxes two went again Results mazes still tie first place CD decreed unlim ited flyoff point yours truly conContinued page 142 Somewhere photo Sigrid Rich ters Alex Richters Klemm L-25d seen South Shore Electric fly Weighs 51 lb uses 20950 mAh cells Unger 18 motor also uses 1612 Ah cells Char lie Sylvias Electric fleet shown behind Bud Chappel Sport Scale China Clipper fame built Ford Trimotor four beautiful models brought South Shore Electric Fly uses 18 800-mAh cells power three Mabuchi 05-size motors Its 5/ lb flies 680 sq wing area December 1985 51 Brian Bailies Cabin Playboy used geared Astro cobalt 15 swinging 3-bladed Robbe folding prop 4-cell pack lithium batteries shown taped bottom p lane Pack provides nominal 5 volts 12 amps 20-30 minutes flight time Super battery performance accompanied super battery price too TOLEDO THIRTY-SECOND ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 11 12 & 13 1986 presented Weak Signals R/O Club Toledo Ohio entire length tape used keep epoxy oozing Out through breaks next step involves cutting fiberglass cloth bridge cracks about two ches either side applying inside fuselage epoxy What epoxy Use epoxy working life least 30 minutes cloth can well-satured smoothed out thor oughly over cracks use fingers finicky builders can use brush epoxy has cured tape outside removed point outside fuselage wont look pretty because cracks will still have uneven surface next step will take care Mix up batch filled epoxy use Sears Filled Epoxy Cement Number 9 80605 tough brittle sands well leaves paintable surface Apply area repair epoxy barely higher un damaged area put pieces mask ing tape over top epoxy help conform surface keep running out area cures epoxy cures remove masking tape low spots enough epoxy applied will necessary just enough used small amount hand-sanding will bring repaired area down perfect match adjacent surfaces other hand too much epoxy applied use sanding block bring Exposition information available contacting Wayne Yeager co-director ticket address shown below ADVANCE TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon instead stamps Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $4 00 per day adults $100 per day children 12 under Ticket sales final non-refundable tickets along program will returned near mid-March repaired area down close other surface finish job light hand-sanding Looks good doesnt couple coats primer sanded between coats will make look better Finish painting should make repaired area nearly indistinguishable way see contest red white black Tiporare challenge tell repaired follow techniques described above can issue challenge like next repair job too Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32S48 RC Electrics/Kopski Continued page 51 ceded Brian Baffle Robbinsville NJ grounds simply could keep up lithium-powered Play boy Yeslithium Ni-Cd Brian has good fortune have ready supply custom-provided oneshot lithium cells energy source has significantly higher energy density nickel-cadmium systems saw no point stacking up 16 1 2-Ah sourced five-lb Cub against him Cub An O-T Yep Peerless offered six-foot Cub 1937 So settled second place fact plenty fun way Im delighted SAM COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED 76 gave Electric try did matter out-technologied O-T Electric event success Well entries did Tex aco event Electric en tries first KRC Elec tric Fly Electrics made up about 15-20% planes flew Initial reaction SAM 76 gonna again next year success betcha buddy initial try Electric O-T drew con siderable interest liquid-fuel crowd feel sure participation will double next year O-T readers others well take example set up Electric event area Keep first simple forget complex rulesand keep fun Thats what hobbys personal Thanks go out SAM 76 congratulations nice job Seuth Shere RC Club Electric Fly Sun day July 21 another hot day calmat least Bridgewater MA site South Shore RC Club fly ing site CD Charlie Sylvia ran clubs First Annual Electric Fly meet 716-mile round trip very much success firstever Electric activity meet patterned after KRC Electric Fly low-key affair awards third Continued page 144 MODEL MOTOR MUGTM high quality totally glazed ceramic engine mug must modeler Standing 51/2 inches tall large 10 oz capacity its real attention getter definite collectors piece years come Only Plus $200 postage $695 o handling per ordet CA residents add sales tax REPLACEMENT PARTS FOR Kraft Engines Testori McCoy TaIpen 40 RJL ENGINES Call Only Factory Source RJL INDUSTRIES Free Parts Catalog Available B JIEROKEE RARE THE REALLY BIG LITTLE AIRPLANE Past AssemblyDesigned intermediate smelt sine 53 Span proportional radios Hardwood Spars Steerable Nose GearVK MODEL Radio MultI-ChiinitelAIRCRAFT CO Symmetrical RoiItap Stab Airfoil 18% Symmetrical 5868 Transit Rd Recommended Engines 2440DoPow NY 14043 Formed Plastic Cowl Wiadabield Includes Wira Parse Nylon Hardware 684-5555 Pull Span Tapered Ailerons Rudder 142 Model Aviation RIL Industries ox 5654 dena CA 91107 Phone 818 359-0016 MULTIPLEX DEALER INQUIRIES INVITED 2001 FM Narrowband RCM L V1ZZZZExcIusive MEMORY SOFT MODULE 14 Ch ROYAL mc! FIight Tested Since 1979 7725 E REDFIELD RD SUITE 105 SCOTTSDALE AIRPARKO SCOTTSDALE ARIZONA 85260 0 PHONE 602 483-9577 place three categories no tooth-and-nail regimen South Shore group club members judge Best Plane Most Aerobatic Longest Flight latter struc tured man-on-man fly Aerobatic judge other AMA District VP Don Krafft addition some surprise prizes farthest traveled largest plane etc 10 participants flew total 22 Electrics sorts day long Some positively beautiful later col umns will present some best photos final results become available again no serious mishaps everyone seemed have great time South Shore group has excellent flying site grounds mediumsecurity penitentiary plenty room around some crops bound ing side spectator area separated pit area wellseparated strip grass well-groomed Electric ROGs rise off-ground easily done Ive spoken CD Charlie since meet tells intends again next year Keep tuned col umn announcement plan attending Im much driv ing such distances one-day meet great time want thank Charlie et al splendid first-time Electric meet Electric supplies trip Bridgewater MA would have happened gracious invitation Dwight Mary Ann Holley Bethel CT stop over way Bethel almost exactly halfway visit delightful indeed Dwight 1982 RC Soaring World Champion took real interest Electric after visiting 1984 KRC Electric Fly participant time Dwight really participant nowhes caught silent flight powered un powered instituted Holleys Silent Flight purpose supplying quiet need absolutely amazed Electric inventory Dwight has amassed just few months Kits motors accesso ries around world Batteries sizes including new 950 mAh size Ill report later column much besides Ive very active Electric 13 years didnt know some stuff existed en courage check out ad issue get copy catalog Youll find wealth suppliesall best isat attractive prices youll find friendly energetic knowledgeable helpful Dwight Holley ready help NowfinallyI have good solid answer letters get lamenting distinct lack Electric supplies knowledge local hobby shops re questing get information Write Dwight Charger time switchesagain Wouldnt ya know just finish some discussion charger time switches last col umn October 1985 proclaiming reli able trouble-free areand now hear theres rash sticky timers out lately Good griefsmoked batteries suggest reread last months column check out timer new charger number dry runs bench Both major Electric manufactur ers country use quality timers major supplier ordinarily work just great So may have exercise warranty dont also shout Electric providersthey try hard good job Its just sometimes have problems too Maybe timer gears made Monday someone tough weekend Anyway please assure yourself costly batteries jeopar dy watch new charger timer before trust its own Basic Electricity last installment seemingly never-ending short course discussed multimetersin particular voltmeter part saw basic Continued page 146 RA MFG OF NI-STARTER L NI STARTER revolutronary concep model engines used boats cars airplanes NI STARTERITMI uses HeadlockITMI adapter locks onto glow plugs stars yosr engine Fits yoar pocket comes CItO charger has LED lights op charging Rechargeable hundreds ot times gives over 50 consecutive starts recharging Available charger Send ad along prepayment receive free shipping handling $2495 charger NI-STARTER$2495 charger Itt OV 220V t 2V taut chargerl NI-STARTER$1 595 charger Chargers$1 295 charger tOV 22tV 12V fast churgerl PLEASE SPECIFY WHICH CHARGER WHEN ORDERING 12421 RANSOM DRIVE GLENN DALE MD 20769301464-2260 144 Model Aviation r ATTENTION ERS EPOXY GLASS COWLS FOR NOSES PICA 50 MOROAN BALSA USA PLATT CONCEPT FLEET HOSTETLER RCM TCRAFr SHEBER PIUS CALE SUPEe CUS FOIcKEe 07 BOEING Pt2 P25 F4B2 PHBH SPARROW HAWK GEE BEE MOO Y MACBRIENS TUReULENT CHeISTEN EAOLE BRISIOHELLAS STARDUSTES II E J3Bt BABY FLYRAeY S OTHE RS WHEEL PANTS FOR CITAeeIA STAROUSTER II PIUS SKYeOLT LieceTy SPORT CHRISTEN EAOLE PeE HAWK MULLIGAN & OTHERS LARGE SCALE PLANS AVAILABLE Please send $100 tar complete list supply Modelers fiberglass parts plans Write call us T & D FIBERGLASS SPECIALTIES 30925 BLOCK GARDEN CITY Ml 45535 PHONE 313 421-6358 BRAZED S HEAT-TREATED WIRE GEARS & CABANES PHONE 313 261-9064 DGA DESIGNS Body Pilot Kit sLightest Pilot available eLifeilke vinyl la tex rubber parts 0 Easy assemble finish eBuild either barnstormer sportsman pilot sKit contains pilot head hands boots helmet cap goggles full templates easy instructions eFuily positionable & moveable eSome simple sewing required WeightPrice 1/6 Scale2 oz$ 795 1/4 Scale4 oz$ 995 1/3 Scale6 oz$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4Scale 1Soz 1/3Scale 225 oz Price 595 795 $1 495 Lightest bust pilot available oLifelike vinyl latex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 fer current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks tor check clearSorry-No COD s hI1wu ml 1LCj1~ meter movementa very sensitive device itselfis combined selection external resistors series make dial read several voltage ranges switch-selectable resistors known multipliers effect scale meter face different fullrange values voltage Using 25-volt scale meter well-suited read terminal voltage single Ni-Cd flashlight cell Selecting 50-volt range meter well-suited check charg ing voltage new 20-cell aerobatic motor battery just installed Such idea behind multimetermany useful meter scales box However addition multime ters include several functions Typically offer current ammeter resis tance ohmmeter functions addition voltage function already discussed Just several voltage ranges offered also have several current resis tance ranges Some multimeters use combination switches select func tions scales some use array different test-probe jacks accomplish same thing latter case just plug test leads appropriatelymarked jacks Current ranges scaled vari ous range values withyou guessed resistors theres big differ ence between multipliers used scale voltage ranges shunts used scale current ranges Youll recall multipliers very large resistance valuemany thousands millions ohms shunts typically low values resistance hundreds ohms downward fractions ohms does work Youll recall earlier installments Basic Electricity typical basic meter movement found within multimeters requires VERY little current VERY little voltage deflect full scale meter movement verylow-voltage meter and/or very-lowcurrent meter its owndepending choose view Thus order measure motor current example AMPERES taken motor must SHUNTED away meter movement known precise way remaining MICROAMPERES flow through movement accurate known frac tion total example motor current may TENS OF THOU SANDS times larger current moves meter needle Thus lowvalue shunt resistors connected direct ly across meter movement terminals parallel connection some circuit current flows through bothdepending relative values resistance Since electricity follows path least resistance current flows through shunt resistor relatively high resistance meter movement passes small current another way view opera146 Model Aviation tion current metersometimes simpler understand having useful meaning other aspects Electric modeling Lets recall again basic meter movement requires very little voltage applied its terminals move full scale typical internal resistance such movements can thousands ohms Remember voltmeters used measure voltage ACROSS something such battery circuit component Keeping mind suppose VERY SMALL resistorsay about 10 milliohms 10 one-thousandths ohm readily represented short piece hookup wire Yes wire has resistance Say now install wire resistor series motor cir cuitsorta like part actual wiring itselfso motor current flows through Lets say example motor draws 10 amps earlier installments miniseries know voltage drop across special low-value resistor/wire caused flowing motor current would VIxR could also written V 10 amps x 10/1000 ohms same V 100/1000 1/10 olt shunt resistor would therefore present voltage its terminals 01 volt 01 volt meter movement con nected across resistor would deflect full scale effect wire shunt 'component' purpose 'sam ple current flowing tiny resulting voltage drop can measured low-voltage voltmeternamely basic meter movement itself meter scale marked 0 10 amps wed have real working 10-amp meter 10-amp range multimeter example numbers used just thatex amples chosen purposes illustration representative ac tual conditions real applications meter movement having couple thousand ohms resistance its own has no significant effect value resistance very-small-value shunt true such cases given example However smaller current-meter rangessay milliam pere areathe value shunt resistor becomes closer value meter movement resistance affects other As special example shunt resistor exactly equal meter movement resistance meter scale value would double since ap plied circuit would divide equally between movement resistance external shunt insight offered above will prove Continued page 148 ProTechTor NFO- EARS BERGERON ENTERPRISES 443 ROBERTA FULLERTON CA 92632 MODEL PRODUCTS 07444 CORPORAT ON PU ha 314 Pmpiu Plains HEAD Copyright 1977 MPG P R 0 F E S S I_____ 0 N L LOCK ghs ese ed DONT GET KLIPPED GET U iSame eau two inga4 NO FORCE o/1L4atLon SL~ Lody 404 tong c04404i0n 4L LL4 3 48 inch ILad -tanda4d glow plug4 cluding BRIDI £NI/A 9LO-DVIL t OS 4 Stto/cL plu6 FOX FIR& BALL TEO-D&VtL 4L0-BLL 2oZ OPS ROSSI 2 SLr $695 IfI veAhI writ 4erce odd SOC useful should want add rangesor capabilityof instru ment such example concerns fact multimeters offer built-in 10 amp range Electric power systems operate currents greater 10 amps Another example concerns use common 20-volt range digital multimeters what really need 40-volt range Later well see deal other special cases using nitty gritty information preceding discussion just What Im doing trying hammer home fact current meters cluding multimeters current range always connected SERIES circuit youre measuring current flow very important distinction voltmeter always con nected ACROSS parallel component voltage being measured Think current meter water-flow meter current water must flow THROUGH measured Since cur rent meters have VERY LOW internal resistance connecting across charged battery example would stantly damage meter activate protective device meter might contain Finally since obvious current meters cause in-circuit drop least some small voltage would prob ably notice slight change motor rpm meter circuit current-meter voltage drop called 'burden~ insertion drop' usually between 01 03 volts full-scale meter deflection similar situation condition voltmeters Voltmeters require small current operation cur rent stolen circuit being measured effect called loading required current normally very smalla battery wouldnt notice wanted measure voltage across component itself has very little current flowing through rob bing could very significant Fortu nately latter condition does occur Electric power circuits because circuit currents high voltmeter effect goes unnoticed effects would very noticeable such circuits receiver other lowpower high-resistance electronic assem blies often must accounted Thus pure sense measure some thing change hope now recognize significance wiring similar losses Electric model power systems Current flowing through wiring connectors fuses switches etc causes voltage lossand consequently motor power loss Later well see evaluate such losses minimize See insight multimeters work can give appreciation things happen power installationsas promised Next month Basic Electricity con tinues such discussions regarding actual use voltage current functions multimeters some insight operation ohmmeter ranges Please forward questions include SASE please author Bob Kopski 25 West End Dr Lans dale PA 19446 RC Old-Timers/Mathews Continued page 53 reproductions same engines has little surge interest letters also make painfully obvious writers have strong interest using Bill Schmidts igni tion system totally lack capability building circuit drawings Joe Klaus has come rescue Kustom Kraftsmanship operation will soon make available completely assem bled potted circuit board unit reasonable cost Now abso lutely reason either buy repro engine ranging John Morrells little Atom MG Products Forster 99 pick up ignition timer parts old engine youve lying around years Micro Model Engineering Kustom Kraftsmanships address PO Box 2699 Laguna Hills CA 92654 Telephone 714/830-5162 Micro Model Engineerings address 1301 W Lafayette St Sturgis MI 49091 Telephone 616/651-5431 Flash Ohlsson engines dominate Colusa CA contest Contestants flying models powered Ohlsson 60 ignition engines won three firsts second Only 1AA Texaco big Texaco events won other engines Ohlsson sec ond big Texaco antique brute power name game Ohlsson 60-pow ered model outdid challenges cluding several Schnuerle glow-powered entries spite longer allowed motor runs glow brutes due heavier models about Caveat emptor Thats Latin term mean ing buyer beware have examined several previously-mentioned reproduction engines recently part exhibit excellent work manship run well sometimes better originals did matter fact least two examples absolutely subpar both workmanship materi als Ill name since two ex amples might have exceptions rule shaft running downhill case bolts holding front housing ran off-center holes castings must have finished Continued page 150 148 Model Aviation GLOW PLUG CONNECTOR WEVE GOT YOUR STANDARD MUFFLERS SPORT SCALE II MUFFLERS SPORT SCALE MUFFLERS PITTS STYLE MUFFLERS TUNED PIPE ADAPTERS HELICOPTER MUFFLERS BOAT EXHAUST EXTENSIONS ACCESSORIES EXHAUST SYSTEMS SLIM LINE MUFFLERS PO BOX 3295 SCOTTSDALEAZ 85257 602 9875053 three swipes coarse file other popped crank pin after third run came cast spinner out-of-round naked eye could see point . buy reproductions approval clear understanding what guarantees Most manufacturers importers doing excellent work wont hesi tate assure buyer quality prod uct refusedont buy Dee B Mathews 8420 Nantucket Wichita KS 67212 RC Giant Scale/Beckman Continued page 55 years ago flying full-scale homebuilt replica Sopwith Triplane through generosity permitted STARS use own private full-scale landing strip clubs base operations has generously continued permission Carolyn Clapp widow mayor common council city Olean have graciously permitted local Municipal Airport closed full-scale aircraft during two-day Ral ly used exclusively Radio Con trol Scale event STARS Scale Rallies have existed concept must held Sunday fliers bulk model air craft participants no competi tion whatsoever no so-called landing registration fee Just come fly fact register ship display and/or fly given ticket free barbecue chicken dinner Scale ships order day size has never challengedlarge Giant Scale smaller Scale always welcome Though event has become associated Giant Scale basically trueany size welcome providing scale Saturday July 6 started off cool day moderate wind completely over cast sky seemed threaten rain moment did deter registrants Two flight lines set up hard-surfaced main runway airport used eight fliers time six fliers air almost con tinuously carefully-coordinated event flying went along hitch Three ducted-fan models flown superb Helicopter demonstration well 1984 total 124 regis trants two-day event noon Saturday 1985 Rally 118 registrants close ac tivities first day total 144 registrantsthe largest ever approximately 330 pm rains camebucket after bucket full very short time stopped completely flying resumed once again large scale rained another 10 minutes 200 chicken barbecue din ners being cooked would have wiped out As charcoal pits regained heat dinner served about half hour later usual After conclusion flying day STARS held its first model aircraft auction hesitancy some cluding thought might adding already overworked program activities Graciously Frank Anderson Mississauga Ontario former MAAC president offered auctioneer Within relatively short period time Frank everything auctioned off ap pears model aircraft auction will now standard portion annual Scale Rally usual Saturday evening social took placea large bonfire food beverages available fliers families camped Municipal Airport Sunday dawned cool completely over cast intermittent persistent drizzle Flying limited brave souls just wanted fly time spite inclement weather five registrants Sunday morning making grand total 149again largest ever would have registered two full TItn1jq b#wS Save tII8to~001 St Is. @ Tlnlef S pointS afl 150 Model Aviation RC VIDEO. GAZINE PES. Continued page 152 FAI RUBBER Sizes 1/4 3116 1/8 3/32 1/16 042 thick pound box Price $1300 FREE 4 oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits incH Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig ft KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAl Model Supply Ignition Engine Parts Only Over 450 Items Send $200 current catalog PO sox 3557 TORRANCE CA 00510