ORBITER name Hand-Launch Glider kit Dodgson Designs quite de parture Boh Dodgson two reasons First designed Bob Erie Jackson Portland second its built-up wood con struction instead Bobs normal fiberglass-andfoam technology H-L Gliders gaining more adher ents because theyre great way getting few flights during lunch Also can learn thermal planes up 15 ft thermal ing 150 ft seems like piece cake Eric flew Orbiter Nats H-L event finished fifth behind some pretty heavy competi tion likes Wurts Martin Jolly Har ris ship has 59-in span 432 sq area Selig 4061 airfoil weighs 17 18 oz miniradio three servos Whats unusu al Hand-Launcher features ailerons roll control flaps optional report Bobs Second Wind bian nual newsletter After flying season flapped version Orbiter Eric has some sights using flaps really light lift cant quite climb out marginal thermal Eric cracks little positive flap about %2 root trailing edge allows him turn tighter fly slower climb faster positive flap elevator compensation also gives him effect slight Up elevator maxes Nats Eric reflexed flaps thermaled plane inverted about half max Eric says hasnt found reflexing TE increases launch height usually launches neutral flap really light air sometimes launches %2 positive flap going back neutral just before tops out Orbiter kit $65 plus shipping Its best send two stamps Bob complete catalog mailing info Second Wind newsletter published twice year $1 per copy cash OK contains tidbits interest espe cially Dodgson Designs kit fansof number steadily growing Thermal contest fliers have found Bobs Lovesong tough ship beat address 21230 Damson Road Bo thell WA 98021 modeler steps up October 1989 col umn pumped Oly II pilots consider mov ing up Sagitta gitta fliers advanc ing aileron ships Going more ca pable planes think biggest kicks can experience fantastic hobby column used analogy full-size Soar mg ie transition trainers up 15Meter Unlimited racing ships pitch prompted Bill Anderson Laguna Niguel CA write Ive never written before enjoy col umn MA very much Ive Sailplanes 25 years have fun enjoy ment still reason letter column about full-size Sailplanes think must have gotten Schweizers mixed up Although some 2-22s around its 233 main trainer new glider pilots 1-35 built Standard Class com petition ship intermediate type happen know little about Schweizers because own SGS l-26E serial number 518 Al though Ive full-size soaring year know 1-35 ship can jump trainer 1-26 considered intermediate 1-35 might interested know rea son got full-size soaring because ing some research Scale RC project Steve Moskals 1-26 construction article February 1988 issue Model Avia tion took ride signed up lessons soloed about 15 hours began looking own 1-26E located purchased good Mo desto CA 1-26 Well its favorite ships long time Steves construction article appeared MA just start building seeing full-size ship knew would just matter time until got flew Its great ship Quick responsive thermals best joy fly thrill minute model flies just like big fly off slope Harley Michaclis newest designs span spectrum technology Experimental Roto 1 L uses pivoting wings roll longitudinal el evator control Wing also has camber-changing flaps Stabilizer fixed position Hed like other modelers try scheme infor mation column Easy Eagle R Two-Meter trainer kitted Ace RIC Inc Control surface hinging via Harleys rubber hinges Dodgson Designs newest kit Eric Jackson-designed Orbiter Hand-Launch Sailplane Flat wing tells uses aileronsunusual ship size Flaps optional Eric R did very well 89 Nats Kit sells $65 plus shipping Its wood built up 52 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 agree about progressing models higher performance Its lot fun challenging Im enclosing two pics model other full-size 1-26 kind letter love get nec essarily bits pointing out slips because Bills experience shows closely modeling full-size soaring can come together Its either/or situation Id bet model Sailplane fliers all-around aviation nuts would jump chance try full-size too could would interesting hear fliers both Harley Michaelis retired insurance agent Walla Walla WAbut should have aero engineer because hes mechanical ge nius Harleys Roto experimental ship designed test wing system incorporates twist wings roll pitch control plus flaps Think about minute wings rotate opposite directions aileron roll action ro tate together elevator pitch control top full-span flaps can used camber-changing time Harley showed Roto 1 Richland Fun-Fly Roll pitch work off two servos transmitter elevon mixing capability third servo all-mechanical flap system dont ask explain worksall know does Harley flight testing Roto 1 would like few experienced Sailplane fliers join forces him continuing development program would involve building test flying Roto experimental planes reporting results back Harley Obviously program isnt faint heart Only first-class scratchbuilders lots time skill need apply Harley has made up information packet contains discussion sheets drawings vari ous linkages scale drawings Roto etc readers interested receiving packet Harley would like send him $3 cover postage copying costs self-addressed 9 x 12-in envelope address 26 South Roose velt Walla Walla WA 99362 Harley also sent better picture Easy Ea gle trainer described September col umn very practical-looking Two-Meter kit features flaps new Selig 7032 air foil Harley course uses rubber Harleys Hinges Easy Eagle work great Both kit hinges manufactured Ace R/C Inc available local hobby shop Soaring handicaps Most people familiar Continued page 157 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Attractive case included ...~Wraparound frame fits comfortably over mast prescription glasses Blocks harmful ultraviolet radiation Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available in Clear shop work 81325 Amber overcast days & late afternoons S1495 Gray S1495 & Mirror Si 995 sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved bim serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer ____________Pikes Peak RC Club Prices include shipping handling E9Jpiii See hobby dealer first inininin doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 SCALE RADIO CONTROL 0 VINTAGE sizes2hz 3/431/i 133/4 11443/i 1A5 1/61/a WHE CONTROL-UNE SMOOTH CONTOUR 3/4234 1314 114334 11/24/z 214514 VISA/MC ELS FREE-FUGHT 00 GOLDEN AGE sizes214 31/a 1334 11443/a 11/25 17/a6/z NEW BALLOON 2hz4hz 314514 3 34 January 1990 53 Bill Anderson wanted some Scale re search -scale Schweizer 1-26B model building AboveMA Febru ary 88Plan No 578 went air port got ride full-scale Sailplane loved much went get pilots license bought used 1-26E Below SUCKER-KIT55995 tiVHS Show & Tell Video $3995 Add $400 shipping & handling MI residents add 40/0 sales tax 0 C c 5Send 3100 SASE Icr producl lid samples real weed veneer skins Product List Includes Gapless Arrow Shall Hinges carbon Tow Mylar Sheet E -Tech items er Inquires Welcome C SEND CHECK OR MONEY RDER TO J'5 -sPO Box 866 0 Lapeer Ml 48446 313 664-3330 imposits Aircraft Eng & SupplyFAX 664-9780 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog theac other kite accessories ~ ~DEPT MA PAWNEE ST SAN MARCOS CA 9 words optically coupled speed controls must designed way scratch Sorry Please re fer December 1989 column discus sion about installing RF chokes Other reader reaction has taken two sides writing no problems nonoptically coupled controls noth ing problems guess someone has installation noise-free despite hardwired optically coupled speed control its very hard understand optical isolation would ever needed contrary fashion motor noise problems quite aware unpleasant sometimes downright nasty situation can Remember different power systems speed controls radios can act react completely differently fact Ive seen two receivers same manufacture type function differently respect motor noise So fortunate have no such problems please dont conclude gen eral no such problems did youd dead wrongand could happen very next system since should reading some what just prior holidays please accept sincere wishes very happy holiday season great Electric New Year RC Soaring/Blakeslee Continued page 53 handicapping systems used bowling golf hadnt heard being used Soaring until read about Diablo Valley Soar ing Societys new system club contests fine newsletter Thermal Tales Co-editor Pete Thompson explains works executive committee decided needed some way fledglings less experienced fliers feel less intimidated better per forming pilots whole idea course encourage participation have fun club contests Accordingly club has adopted handicap system club contests lieu class system have employed date Objectives 1 Permit members varying skill lev els variable performance capabilities com pete together relatively equal chance winning 2 Provide vehicle assigning members teams desired 3 system should responsive individuals current performance System 1 Normalized score actual raw score di vided perfect score times 1000 2 Fliers average mean last four normalized scores 3 Handicap computed 70% differ ence between fliers average 950 4 Handicap added pilots normalized score determine final score 5 Annual championship determined adding nine best final scores during year Other miscellaneous facets DNF did finish day will included fourmonth rolling average although would part season total Popoffs should allowed everyone handicap over some number like 100 150 Fledglings may turn trans mitters over experienced fliers get out trouble long returned pi lots safe control recovered Handicaps calculated first Diablo Val ley contest under new format ranged low 6 Bob McGowan up high 257 As turned out Bob off day raw score 748 So final score 754 other hand Don Anthony hot day scoring 954 scratch would have won him contest handicaps adding 168 handicap gave him final score 1122 points big winning margin Pete says go ing evaluate system worked 89 maybe reset some parameters 1990 Any other clubs want give try Sportsman Multi-Task news Feedback just starting come SMT activities As probably know 1990 will SMT develop mental year encouraging clubs add some type Distance Speed task traditional Thermal Duration contests lots ways Speed Distance tasks can run below make things equal less intimidating Sportsman fliers SMT Committee recommends 75-oz limit planes Id like print couple recently received items just give flavor whats happen ing first letter Ray Hayes Secre tary LSF After reading October column couldnt resist sending attached article Ray sent copy Dan Pruss Soaring column February 1980 issue Model AviationBE putting SMT contest today Id use --maicnea rerormance system TOP PERFORMANCE K&B tNGINES AirplaneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POXY RtSIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS January 1990 157 NATIONAL CHAMPION ** THE PIXY HAS DONE IT AGAIN IT WON THE US NATIONALS IN 1989 JUST AS IT DID IN 1985 ESTABLISHING THE PIXY AS THE TOP 2-METER COMPETITION GLIDER TODAY DAVE BANKS IS THE WINNING PILOT FOUR OTHER PIXYS TROPHIEDI 4 MATS WINNERS DAVE BANKS PIXY * laad*lrnpoloeawswoatdsg * * U-AammI Newelettor SECOND WID Ia Now Available SI par year * 21230 Damson Road Bothell WA 98021 206-778-8067 Put Fun Back Fun Fly Get ROUN TUIT Today Its round sflat flies 30 Flying DISC STOL SUPERIOR Small Field FLY Aircraft STABLE PREDICTABLE EtAGILE $43plus *4 shipping TX Res add 7% sales tax VISA Foam ft Lite Ply Construction ELE VON Mixer Included 25- 4B cid 3-3Slbs Accurate QUALITY Materials Wing span 64 semi-symmetrical Wing area 736 sq Length 45 Weight 41/2 5 lbs Engine 35 40 TS 4 channel radio reauired SCEPTER Fast Highly Aerobatic Sport Plane Wing span 60 semi-symmetrical Wing area 540 sq Length 42 1/2u Weight 5-5 /2 lbs Engine 45-60 TS 4 channel radio required Certified Checks money orders Michigan Residents add 4% sales tax Personal checks Allow 2 weeks clear COD add $300 ign Add $1500 MODELS INC 285 FIRST ST PO BOX 130 FREELAND MI 48623 517 695-5385 Man turer Hi Performaftbtati andraft CULPEPPEE C MODELS INC 2526 Washington DubuqueIA 52001 3191583-4530 SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dealer/Diatrlbutor Inquirm. Invited Pier di Re dents Add 6% Sales Tan original format described Dan single change very efficient contes tants enjoyed emphasis Distance best part about current interest SMT taking positive step using organizersupplied winches rather trying change current F3B rules Proving theres nothing new under sun 1979 Ray Fort Wayne LOFT gang put sizeable F3B-type contest incorporated ideas talking about now Ray didnt have restrictions planes must remembered still early years RC Soaring An interesting sidelight about contest famous Airtronics Sagitta introduced Lee Renaud given prototype Sagitta kits nine top pilots condition fly LOFT contest nine Dwight Holley went win World Championship 1981 Gobbler 1979 Sagitta considered pretty hot F3B ship Remember 1977 Skip Miller won first Soaring World Championships Airtronics Aquila Today fully sheeted straight wings addition ailerons Sa gitta would make fine SMT plane highlights Ray ran contest e round consisted Speed Distance task Duration Distance task putting emphasis Distance Three organizer-supplied winches used No working times used e No man-on-man scoring used flight scored against best flight task Speed flown rotation time Distance flown two time using four-minute flight time Dura tion flown three time using F3B Six-Minute Precision So Ray said format would still good way hold SMT contest Manpower flagger requirements Distance reduced because two planes flown time next news quickly grabbed attention SOAR club Chicago newsletter ed ited Tom Kallevang August Jim McCar thy held SOAR Sportsman F3B contest novel twists Speed run minimum cap 30 seeFIBERGLASS PARTS Carry over 300 cowls 70 wheel pants made epoxy glass lightweight brittle zero pnholes Send SASE $100 latest cataloa onds did exactly 30 seconds got 1000 points did under 30 seconds still got 1000 points Times over 30 seconds normalized 30-second cap lowest time happened over 30 seconds didnt happen contest e Distance run three set target levels six eight 10 laps per round first round target six laps made six laps scored 1000 points target next round eight laps didnt get six laps target stayed six laps etc Duration per F3B rules working time flown man-on-man love see kind stuff shows guys putting ol gray matter work inking up new original ways run Speed Distance tasks Ive heard max imum caps speed task like 35 40 sec onds admit never thought mini mum cap idea Also increasing target laps Distance very imaginative ideas good because keep Sportsman pilots thick contest Lets hear about club running SMT contests Understanding Ni-Cds following article Brian Chan appeared South Bay SS newslet ter under heading Low-Tech Stuff Everything wanted know about Ni-Cds afraid ask John Dvorak edits excel lent Silent Flyer newsletter has tradition printing informative original articles think timely review Ni-Cd batter ies because us colder climes can use slack time make sure packs top shape Brian known Dr Chan friends because skill stitching up sick ships Most RC modelers use Ni-Cd batteries radios yet few seem understand well rest equipment article about workings Ni-Cds digging too deeply technical explanations goal help prevent premature battery failure keep explanations simple well discuss 500-600 milliamp-hour cells come RC systems Fast-charging RC car Elec tric flight power packs require different treatment 158 Model Aviation ! DOUBLE VISION! THE iWO IN ONE TRAINER STABLE HIGH WING PLANE AND AEROBATIC LOW WING ALL IN THE SAME KIT CI areor scralcfl Oulloer SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set todayl See Dealer Cataloger Order lIf dont carry Sgaare tst Tasla call pay far call well pay far shipping us sad Canadal C 00 Eatra r & D FIBERGLASS SPECIAL 38624 Mt Kisco Sterling Hgts MI 48310 Call Us 313 978-2512 *New Owners * Steve & Km Durecki z PRACTICAL SIZED GIANT SCALE MODEL PLANS F bergiass Cowlings Canapes Ava ab e F-i5 Span 77 DC-31 1/2 1140Span$4200 F4U CORSAIR2 1/4 193Span$3000 A6M5 ZERO2 1/2 191Span$3000 Plans RK-20 CURTIS P402 1/2 194Span$3000 K-740 Ducted Fans AT-6 TEXAN24 1101Span$3000 ntom 35 Span SIO00 F8F BEARCAT2 112 186Span$3000 gen 32 Span $1000 FOKKER DR-i27 163Tripe$2700 5 36 Span $1000 ___________________________________________Catalog Plans Accessories Supplies n Canopy $1500 Order FromCredited First Order $25 More_______________________ Nick Ziroli29 Edgar Dr Smithiown NY 11787 USA516-234-5038 1 long should batteries charge lot Room temperature efficient remains state discharge damage can normal 50-60 milliamp chargers charging charging temperature although 50 -90 F quite caused cell reversal should 14-16 hours no matter little bat- acceptable Charging extreme temperature can 8 What about accidental reverse charging tery has used previous discharge cause damage Discharge rates reason- inadvertent complete discharging Complete ensures cells fully charged able 0 120F efficient dis- discharging under load will probably cause time entails no risk damage due charge temperature about 90 freezing cells reverse polarity will reverse overcharge able hand point Ni-Cds lose about 10-15% capac- charging low rates may cause perma end period charge few hours ity nent damage Charge battery 24 hours dis longer rather stoping early 100-hour over- 5 much discharge time can expect charge through controlled discharger battery charge C/10 rateC being amp-hour freshly charged batteries Most transmitters cycler recharge 15 hours again dis rating will cause damage battery use about 150 milliamps gives about three charge through discharger Time final dis has left completely discharge 24-hour hours switched-on time although new com- charge ascertain damage has caused charge advisable time charge puter transmitters might have higher current have occasion accidentally left night before want use model Ni-Cds draw Flight pack durations vary enormously ac- transmitter on occasion batslowly lose charge its best charge un- cording use receiver itself draws 10 tery fully recovered til intend fly to 20 milliamps servo motors draw con- 9 deal memory after re 2 long batteries keep charge siderably series experiments pro- peated partial discharging soand should top off charge model duced following results should called memory effect does happen prac stored winter Sintered cylindrical cells treated very general guide tice Yes surprised too learned pencells will self-discharge room tempera- Two-channel Thermal Sailplane intermit- manufacturers say unable pro ture about 20% per month completely dis- tent stick usel00 mA average current draw duce effect except carefully controlled lab charged four five months prob- five-hour expected battery time tests conclude must effect ob lem can stored state charge al- Four-channel Thermal Sailplane served before battery-manufacturing technology indefinitely significant loss life servo continuously used three servos intermittent reached todays standards Topping-off unnecessaryperhaps waste- use150-200 mA average current draw 25- 10 What does mean crystals form ful Just charge completely discharged packs 3-hour expected battery time cells usually quite harmless 24 hours before use F3B-type Sailplane six servos continu- caused minute porosity sealing ring 3 Should fast charging trickle charging ous use270-330 mA average current draw 1 s- Electrolyte reacts carbon dioxide air used No Stick standard C/l0 rate 50 2-hour expected battery time forms crystals potassium carbonate Wipe 60 milliamp charge Trickle charging may re- 6 What life expectancy battery crystals off dry cloth smear little duce useful capacity cells particularly Most Ni-Cds will last 800 000 complete cy- silicone grease prevent further growth used continuously Fast charging well des cells partially discharged Crystals may also form around safety risking reduction battery life capacity cycle life expectancy substantially in- vent cells have abused gross overwhen properly controlled inefficient Man- creased After periods mentioned cells charge overdischarge causing valve ufacturers usually recommend charging useless capacities reduced open lose little electrolyte com 70% 80% capacity must fast charge 7 Does stalled servo ruin battery monly called venting situation usually properly carefullystudy manufac- stalled servo draws about 400 mA there- doesnt happen unless cells have fast turers instructions fore discharging battery very quickly charged accidentally short-circuited Should 4 What effect does temperature have Quite itself does cause damage battery suspect has happened check loss OUT OF THE ASHES .. THE WINNERS CIRCLE PHOENIX SPAN 132 AREA 1047 SQ IN WEIGHT 7276 OZ AJFlFOIL 84061 WiNGLOAD 10 OZISQ FT ASPECT RATIO 1671 ______________________ COMPETITION PRODUCTS -1-921 BIRDIE WAY APOLLO BEACH FL 33872 ____________FOR ADDONAL INFORMAllON SEND LBASE813 845 5171 January 1990159 td Co aiIn*t nmn~ Only certihed checks money orders accepted Minimum order S 1200 ihme packages old Pomerpoles $350 per package tisO shipping handling CT residents add 75% sales las Prices sobiect chasge notice DEALER IF4OUtAIES INVITED tother intormalion dealer onces send SASE Rosiness Card SERMOS RIC SNAP CONNECTORSInc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 Smal stanwed aett-sddrcind cowiope tar pncusa individual cfsnisicns Add 5300 fir COD Parrish Aircraft & Scale Models 1125 SW 4*bTefhntstloe1 333tT 305 581 4477 SAVE YOUR FIELD SNUF-LER muffler Ia low cost easy install lightweight sound reducing muffler no performance penalty answer AMA muffler rule suggestions saving flying fields Meets AMA muffler rule suggestions SNUF-FLERTM 3 10 decibels quieter stock muffler MUFFLER No power loss wIth possible 300-500 RPM increase patented Improves engine idle s better fuel economy Easily attached 25-108 stock mufflers Heat corrosion resistant Black E coat finish No special adapters required Weighs 35 025 Fits ASP BRAT ENYA FOX HP IRVINE K & B 05 MAX ROYAL VS SUPER TIGRE mufflers II available hobby shop ORDER DIRECT immediate shipment Check MO Visa MC. CODSEND 2Sf STAMP accepted Add$250 tsr UPS $200 COD and6% salestasFOR ADDITIONAL INFO Lfor Cald reodentAND JTEC CATALOG capacity discharger 11 aviv need cycle battery Yes Repeated charge discharge cycles low current levels such experience RC tend form active materials cells large crystals thus lessening active surface area Although does affect capacity battery does tend reduce discharge voltage can adversely affect operation equipment course time Perform ning few controlled cycles higher charge discharge rate reduces crystals effectively re vitalizing battery Discharging 11 volts per cell considered full discharge battery cycler available few dis charges through controlled discharger de scribed below time followed 24-hour charge radios 50 mA charger pro vide acceptable quite efficient alter native cycling should performed once twice year depending much use equipment 12 What happens cell goes down cases unless battery has severely mistreated will have caused inadequate charging ie trying recharge amount battery has dis charged Because charging about 70% ef ficient takes 14 15 hours put back 500 mA safer regard cells being fully discharged time used individual cells battery slightly different capacities weakest cell ie. lowest fully recharged time will start lag behind others capac ity Eventually lag will cause cell dis charge completely partway through discharge cycle entire battery pack results will obviously disastrous happens flight Normally condition one-cell discharge will cause cell reverse its polarity thus lowering batterys voltage over two volts unless left state long period se vere permanent damage should result partic ularly pencells Recharge check bat tery described above remember fully charge time future 13 can check capacity bat tery cvcler Build controlled dis charger can made quite simply requir ing few resistors spare charger plugs voltmeter stopwatch circuit de scribed below discharges about 230-240 milli amps uses cheap resistors can built about hour operate instructions receiver transmitter instructions brackets [I After charging battery least 15 hours connect voltmeter points B [A C] discharger connect dis Rx Jack resistors 820 5% Unit de signed discharge ONE pack time Av erage current drain about 240 mA charger plug appropriate battery volt meter should read 5-6 volts [10-12 volts] will drop about 475 [95] volts over next 90 minutes As endpoint reached will drop about 45 [901 volts over 10minute period drop 44 [88] volts over five minutes final useful voltage Disconnect battery make note total time discharge Around 120 minutes indicates good battery Much less indicates low capacity low capacity suspected recharge battery 15 hours repeat discharge During discharge check voltage 10 minutes until voltage drop begins ac celerate watch closely making sure disconnect 44 [88] volts Keep record discharge times comparison future checks possible equip yourself battery cycler like Ace RIC Inc Digipace BB cycler much preferred over manual discharger because does everything described above automatically recharges both packs discharge cycle completed cost crashed model much price cycler RC Pylon Racing/Hager Continued page 55 RPM Header only16000-16100 pipe 15200 Comments Picco Q500 engine uses upper-end parts piston cylinder liner conrod wrist pin same catalog numbers shown rear-intake marine/FAI/Formula version liner has approximately 1800 ex haust duration puts piped sleeve category above results show Rossi gets very little boost pipe Picco gets plenty Rumor has Webra engines also run much better pipe havent tested yet Anybody got theyd like loan testing other hand stock Picco pipe ap pears long enough help en gine actually detune hold back Somewhere between stock MACS pipe length stock Picco pipe length predict 160 Model Aviation plane desogned meet QSPRA Fonnula 120 nales 1/4 scalemodel accepts 60120 ci engines Features Epoxy glass fuselage foam wing contnaction Dursi landing gear scale landing gear add $1500 erharK wS MINI-JET SERIES planes feature balsa constmction Designed intermediate flyer mind will accept 25 32 size engine uses rear exhaust engine exceptional perfomance Get thrill jet hassles ducted fan $5 AACI Win5 Spain Laigmud -0 nisjn ins osity fly Wim sina 720 sq si Bns 454 cycle ir40 2 cycle also amitable fcx tarp electric mum Plans Cowling andAmg Ribs also sold Full kit $8500 Please add $400 shipping turn printer mote airfoil plotter FOILED AGAIN! OT AIRFOILS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 ZZ o,,ooJOMdofrf US$50 Rqo OMPC 7AT,p,rbie-C, opo0O po0 pro 0lS5ro~7 dop pwlI 525 354okUIUm S,fr ko,.oyod,w CYGNET Software 24843 Del Prado #141b Dana Point CA 92629
Edition: Model Aviation - 1990/01
Page Numbers: 52, 53, 157, 158, 159, 160
ORBITER name Hand-Launch Glider kit Dodgson Designs quite de parture Boh Dodgson two reasons First designed Bob Erie Jackson Portland second its built-up wood con struction instead Bobs normal fiberglass-andfoam technology H-L Gliders gaining more adher ents because theyre great way getting few flights during lunch Also can learn thermal planes up 15 ft thermal ing 150 ft seems like piece cake Eric flew Orbiter Nats H-L event finished fifth behind some pretty heavy competi tion likes Wurts Martin Jolly Har ris ship has 59-in span 432 sq area Selig 4061 airfoil weighs 17 18 oz miniradio three servos Whats unusu al Hand-Launcher features ailerons roll control flaps optional report Bobs Second Wind bian nual newsletter After flying season flapped version Orbiter Eric has some sights using flaps really light lift cant quite climb out marginal thermal Eric cracks little positive flap about %2 root trailing edge allows him turn tighter fly slower climb faster positive flap elevator compensation also gives him effect slight Up elevator maxes Nats Eric reflexed flaps thermaled plane inverted about half max Eric says hasnt found reflexing TE increases launch height usually launches neutral flap really light air sometimes launches %2 positive flap going back neutral just before tops out Orbiter kit $65 plus shipping Its best send two stamps Bob complete catalog mailing info Second Wind newsletter published twice year $1 per copy cash OK contains tidbits interest espe cially Dodgson Designs kit fansof number steadily growing Thermal contest fliers have found Bobs Lovesong tough ship beat address 21230 Damson Road Bo thell WA 98021 modeler steps up October 1989 col umn pumped Oly II pilots consider mov ing up Sagitta gitta fliers advanc ing aileron ships Going more ca pable planes think biggest kicks can experience fantastic hobby column used analogy full-size Soar mg ie transition trainers up 15Meter Unlimited racing ships pitch prompted Bill Anderson Laguna Niguel CA write Ive never written before enjoy col umn MA very much Ive Sailplanes 25 years have fun enjoy ment still reason letter column about full-size Sailplanes think must have gotten Schweizers mixed up Although some 2-22s around its 233 main trainer new glider pilots 1-35 built Standard Class com petition ship intermediate type happen know little about Schweizers because own SGS l-26E serial number 518 Al though Ive full-size soaring year know 1-35 ship can jump trainer 1-26 considered intermediate 1-35 might interested know rea son got full-size soaring because ing some research Scale RC project Steve Moskals 1-26 construction article February 1988 issue Model Avia tion took ride signed up lessons soloed about 15 hours began looking own 1-26E located purchased good Mo desto CA 1-26 Well its favorite ships long time Steves construction article appeared MA just start building seeing full-size ship knew would just matter time until got flew Its great ship Quick responsive thermals best joy fly thrill minute model flies just like big fly off slope Harley Michaclis newest designs span spectrum technology Experimental Roto 1 L uses pivoting wings roll longitudinal el evator control Wing also has camber-changing flaps Stabilizer fixed position Hed like other modelers try scheme infor mation column Easy Eagle R Two-Meter trainer kitted Ace RIC Inc Control surface hinging via Harleys rubber hinges Dodgson Designs newest kit Eric Jackson-designed Orbiter Hand-Launch Sailplane Flat wing tells uses aileronsunusual ship size Flaps optional Eric R did very well 89 Nats Kit sells $65 plus shipping Its wood built up 52 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 agree about progressing models higher performance Its lot fun challenging Im enclosing two pics model other full-size 1-26 kind letter love get nec essarily bits pointing out slips because Bills experience shows closely modeling full-size soaring can come together Its either/or situation Id bet model Sailplane fliers all-around aviation nuts would jump chance try full-size too could would interesting hear fliers both Harley Michaelis retired insurance agent Walla Walla WAbut should have aero engineer because hes mechanical ge nius Harleys Roto experimental ship designed test wing system incorporates twist wings roll pitch control plus flaps Think about minute wings rotate opposite directions aileron roll action ro tate together elevator pitch control top full-span flaps can used camber-changing time Harley showed Roto 1 Richland Fun-Fly Roll pitch work off two servos transmitter elevon mixing capability third servo all-mechanical flap system dont ask explain worksall know does Harley flight testing Roto 1 would like few experienced Sailplane fliers join forces him continuing development program would involve building test flying Roto experimental planes reporting results back Harley Obviously program isnt faint heart Only first-class scratchbuilders lots time skill need apply Harley has made up information packet contains discussion sheets drawings vari ous linkages scale drawings Roto etc readers interested receiving packet Harley would like send him $3 cover postage copying costs self-addressed 9 x 12-in envelope address 26 South Roose velt Walla Walla WA 99362 Harley also sent better picture Easy Ea gle trainer described September col umn very practical-looking Two-Meter kit features flaps new Selig 7032 air foil Harley course uses rubber Harleys Hinges Easy Eagle work great Both kit hinges manufactured Ace R/C Inc available local hobby shop Soaring handicaps Most people familiar Continued page 157 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Attractive case included ...~Wraparound frame fits comfortably over mast prescription glasses Blocks harmful ultraviolet radiation Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available in Clear shop work 81325 Amber overcast days & late afternoons S1495 Gray S1495 & Mirror Si 995 sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved bim serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer ____________Pikes Peak RC Club Prices include shipping handling E9Jpiii See hobby dealer first inininin doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 SCALE RADIO CONTROL 0 VINTAGE sizes2hz 3/431/i 133/4 11443/i 1A5 1/61/a WHE CONTROL-UNE SMOOTH CONTOUR 3/4234 1314 114334 11/24/z 214514 VISA/MC ELS FREE-FUGHT 00 GOLDEN AGE sizes214 31/a 1334 11443/a 11/25 17/a6/z NEW BALLOON 2hz4hz 314514 3 34 January 1990 53 Bill Anderson wanted some Scale re search -scale Schweizer 1-26B model building AboveMA Febru ary 88Plan No 578 went air port got ride full-scale Sailplane loved much went get pilots license bought used 1-26E Below SUCKER-KIT55995 tiVHS Show & Tell Video $3995 Add $400 shipping & handling MI residents add 40/0 sales tax 0 C c 5Send 3100 SASE Icr producl lid samples real weed veneer skins Product List Includes Gapless Arrow Shall Hinges carbon Tow Mylar Sheet E -Tech items er Inquires Welcome C SEND CHECK OR MONEY RDER TO J'5 -sPO Box 866 0 Lapeer Ml 48446 313 664-3330 imposits Aircraft Eng & SupplyFAX 664-9780 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog theac other kite accessories ~ ~DEPT MA PAWNEE ST SAN MARCOS CA 9 words optically coupled speed controls must designed way scratch Sorry Please re fer December 1989 column discus sion about installing RF chokes Other reader reaction has taken two sides writing no problems nonoptically coupled controls noth ing problems guess someone has installation noise-free despite hardwired optically coupled speed control its very hard understand optical isolation would ever needed contrary fashion motor noise problems quite aware unpleasant sometimes downright nasty situation can Remember different power systems speed controls radios can act react completely differently fact Ive seen two receivers same manufacture type function differently respect motor noise So fortunate have no such problems please dont conclude gen eral no such problems did youd dead wrongand could happen very next system since should reading some what just prior holidays please accept sincere wishes very happy holiday season great Electric New Year RC Soaring/Blakeslee Continued page 53 handicapping systems used bowling golf hadnt heard being used Soaring until read about Diablo Valley Soar ing Societys new system club contests fine newsletter Thermal Tales Co-editor Pete Thompson explains works executive committee decided needed some way fledglings less experienced fliers feel less intimidated better per forming pilots whole idea course encourage participation have fun club contests Accordingly club has adopted handicap system club contests lieu class system have employed date Objectives 1 Permit members varying skill lev els variable performance capabilities com pete together relatively equal chance winning 2 Provide vehicle assigning members teams desired 3 system should responsive individuals current performance System 1 Normalized score actual raw score di vided perfect score times 1000 2 Fliers average mean last four normalized scores 3 Handicap computed 70% differ ence between fliers average 950 4 Handicap added pilots normalized score determine final score 5 Annual championship determined adding nine best final scores during year Other miscellaneous facets DNF did finish day will included fourmonth rolling average although would part season total Popoffs should allowed everyone handicap over some number like 100 150 Fledglings may turn trans mitters over experienced fliers get out trouble long returned pi lots safe control recovered Handicaps calculated first Diablo Val ley contest under new format ranged low 6 Bob McGowan up high 257 As turned out Bob off day raw score 748 So final score 754 other hand Don Anthony hot day scoring 954 scratch would have won him contest handicaps adding 168 handicap gave him final score 1122 points big winning margin Pete says go ing evaluate system worked 89 maybe reset some parameters 1990 Any other clubs want give try Sportsman Multi-Task news Feedback just starting come SMT activities As probably know 1990 will SMT develop mental year encouraging clubs add some type Distance Speed task traditional Thermal Duration contests lots ways Speed Distance tasks can run below make things equal less intimidating Sportsman fliers SMT Committee recommends 75-oz limit planes Id like print couple recently received items just give flavor whats happen ing first letter Ray Hayes Secre tary LSF After reading October column couldnt resist sending attached article Ray sent copy Dan Pruss Soaring column February 1980 issue Model AviationBE putting SMT contest today Id use --maicnea rerormance system TOP PERFORMANCE K&B tNGINES AirplaneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POXY RtSIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS January 1990 157 NATIONAL CHAMPION ** THE PIXY HAS DONE IT AGAIN IT WON THE US NATIONALS IN 1989 JUST AS IT DID IN 1985 ESTABLISHING THE PIXY AS THE TOP 2-METER COMPETITION GLIDER TODAY DAVE BANKS IS THE WINNING PILOT FOUR OTHER PIXYS TROPHIEDI 4 MATS WINNERS DAVE BANKS PIXY * laad*lrnpoloeawswoatdsg * * U-AammI Newelettor SECOND WID Ia Now Available SI par year * 21230 Damson Road Bothell WA 98021 206-778-8067 Put Fun Back Fun Fly Get ROUN TUIT Today Its round sflat flies 30 Flying DISC STOL SUPERIOR Small Field FLY Aircraft STABLE PREDICTABLE EtAGILE $43plus *4 shipping TX Res add 7% sales tax VISA Foam ft Lite Ply Construction ELE VON Mixer Included 25- 4B cid 3-3Slbs Accurate QUALITY Materials Wing span 64 semi-symmetrical Wing area 736 sq Length 45 Weight 41/2 5 lbs Engine 35 40 TS 4 channel radio reauired SCEPTER Fast Highly Aerobatic Sport Plane Wing span 60 semi-symmetrical Wing area 540 sq Length 42 1/2u Weight 5-5 /2 lbs Engine 45-60 TS 4 channel radio required Certified Checks money orders Michigan Residents add 4% sales tax Personal checks Allow 2 weeks clear COD add $300 ign Add $1500 MODELS INC 285 FIRST ST PO BOX 130 FREELAND MI 48623 517 695-5385 Man turer Hi Performaftbtati andraft CULPEPPEE C MODELS INC 2526 Washington DubuqueIA 52001 3191583-4530 SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dealer/Diatrlbutor Inquirm. Invited Pier di Re dents Add 6% Sales Tan original format described Dan single change very efficient contes tants enjoyed emphasis Distance best part about current interest SMT taking positive step using organizersupplied winches rather trying change current F3B rules Proving theres nothing new under sun 1979 Ray Fort Wayne LOFT gang put sizeable F3B-type contest incorporated ideas talking about now Ray didnt have restrictions planes must remembered still early years RC Soaring An interesting sidelight about contest famous Airtronics Sagitta introduced Lee Renaud given prototype Sagitta kits nine top pilots condition fly LOFT contest nine Dwight Holley went win World Championship 1981 Gobbler 1979 Sagitta considered pretty hot F3B ship Remember 1977 Skip Miller won first Soaring World Championships Airtronics Aquila Today fully sheeted straight wings addition ailerons Sa gitta would make fine SMT plane highlights Ray ran contest e round consisted Speed Distance task Duration Distance task putting emphasis Distance Three organizer-supplied winches used No working times used e No man-on-man scoring used flight scored against best flight task Speed flown rotation time Distance flown two time using four-minute flight time Dura tion flown three time using F3B Six-Minute Precision So Ray said format would still good way hold SMT contest Manpower flagger requirements Distance reduced because two planes flown time next news quickly grabbed attention SOAR club Chicago newsletter ed ited Tom Kallevang August Jim McCar thy held SOAR Sportsman F3B contest novel twists Speed run minimum cap 30 seeFIBERGLASS PARTS Carry over 300 cowls 70 wheel pants made epoxy glass lightweight brittle zero pnholes Send SASE $100 latest cataloa onds did exactly 30 seconds got 1000 points did under 30 seconds still got 1000 points Times over 30 seconds normalized 30-second cap lowest time happened over 30 seconds didnt happen contest e Distance run three set target levels six eight 10 laps per round first round target six laps made six laps scored 1000 points target next round eight laps didnt get six laps target stayed six laps etc Duration per F3B rules working time flown man-on-man love see kind stuff shows guys putting ol gray matter work inking up new original ways run Speed Distance tasks Ive heard max imum caps speed task like 35 40 sec onds admit never thought mini mum cap idea Also increasing target laps Distance very imaginative ideas good because keep Sportsman pilots thick contest Lets hear about club running SMT contests Understanding Ni-Cds following article Brian Chan appeared South Bay SS newslet ter under heading Low-Tech Stuff Everything wanted know about Ni-Cds afraid ask John Dvorak edits excel lent Silent Flyer newsletter has tradition printing informative original articles think timely review Ni-Cd batter ies because us colder climes can use slack time make sure packs top shape Brian known Dr Chan friends because skill stitching up sick ships Most RC modelers use Ni-Cd batteries radios yet few seem understand well rest equipment article about workings Ni-Cds digging too deeply technical explanations goal help prevent premature battery failure keep explanations simple well discuss 500-600 milliamp-hour cells come RC systems Fast-charging RC car Elec tric flight power packs require different treatment 158 Model Aviation ! DOUBLE VISION! THE iWO IN ONE TRAINER STABLE HIGH WING PLANE AND AEROBATIC LOW WING ALL IN THE SAME KIT CI areor scralcfl Oulloer SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set todayl See Dealer Cataloger Order lIf dont carry Sgaare tst Tasla call pay far call well pay far shipping us sad Canadal C 00 Eatra r & D FIBERGLASS SPECIAL 38624 Mt Kisco Sterling Hgts MI 48310 Call Us 313 978-2512 *New Owners * Steve & Km Durecki z PRACTICAL SIZED GIANT SCALE MODEL PLANS F bergiass Cowlings Canapes Ava ab e F-i5 Span 77 DC-31 1/2 1140Span$4200 F4U CORSAIR2 1/4 193Span$3000 A6M5 ZERO2 1/2 191Span$3000 Plans RK-20 CURTIS P402 1/2 194Span$3000 K-740 Ducted Fans AT-6 TEXAN24 1101Span$3000 ntom 35 Span SIO00 F8F BEARCAT2 112 186Span$3000 gen 32 Span $1000 FOKKER DR-i27 163Tripe$2700 5 36 Span $1000 ___________________________________________Catalog Plans Accessories Supplies n Canopy $1500 Order FromCredited First Order $25 More_______________________ Nick Ziroli29 Edgar Dr Smithiown NY 11787 USA516-234-5038 1 long should batteries charge lot Room temperature efficient remains state discharge damage can normal 50-60 milliamp chargers charging charging temperature although 50 -90 F quite caused cell reversal should 14-16 hours no matter little bat- acceptable Charging extreme temperature can 8 What about accidental reverse charging tery has used previous discharge cause damage Discharge rates reason- inadvertent complete discharging Complete ensures cells fully charged able 0 120F efficient dis- discharging under load will probably cause time entails no risk damage due charge temperature about 90 freezing cells reverse polarity will reverse overcharge able hand point Ni-Cds lose about 10-15% capac- charging low rates may cause perma end period charge few hours ity nent damage Charge battery 24 hours dis longer rather stoping early 100-hour over- 5 much discharge time can expect charge through controlled discharger battery charge C/10 rateC being amp-hour freshly charged batteries Most transmitters cycler recharge 15 hours again dis rating will cause damage battery use about 150 milliamps gives about three charge through discharger Time final dis has left completely discharge 24-hour hours switched-on time although new com- charge ascertain damage has caused charge advisable time charge puter transmitters might have higher current have occasion accidentally left night before want use model Ni-Cds draw Flight pack durations vary enormously ac- transmitter on occasion batslowly lose charge its best charge un- cording use receiver itself draws 10 tery fully recovered til intend fly to 20 milliamps servo motors draw con- 9 deal memory after re 2 long batteries keep charge siderably series experiments pro- peated partial discharging soand should top off charge model duced following results should called memory effect does happen prac stored winter Sintered cylindrical cells treated very general guide tice Yes surprised too learned pencells will self-discharge room tempera- Two-channel Thermal Sailplane intermit- manufacturers say unable pro ture about 20% per month completely dis- tent stick usel00 mA average current draw duce effect except carefully controlled lab charged four five months prob- five-hour expected battery time tests conclude must effect ob lem can stored state charge al- Four-channel Thermal Sailplane served before battery-manufacturing technology indefinitely significant loss life servo continuously used three servos intermittent reached todays standards Topping-off unnecessaryperhaps waste- use150-200 mA average current draw 25- 10 What does mean crystals form ful Just charge completely discharged packs 3-hour expected battery time cells usually quite harmless 24 hours before use F3B-type Sailplane six servos continu- caused minute porosity sealing ring 3 Should fast charging trickle charging ous use270-330 mA average current draw 1 s- Electrolyte reacts carbon dioxide air used No Stick standard C/l0 rate 50 2-hour expected battery time forms crystals potassium carbonate Wipe 60 milliamp charge Trickle charging may re- 6 What life expectancy battery crystals off dry cloth smear little duce useful capacity cells particularly Most Ni-Cds will last 800 000 complete cy- silicone grease prevent further growth used continuously Fast charging well des cells partially discharged Crystals may also form around safety risking reduction battery life capacity cycle life expectancy substantially in- vent cells have abused gross overwhen properly controlled inefficient Man- creased After periods mentioned cells charge overdischarge causing valve ufacturers usually recommend charging useless capacities reduced open lose little electrolyte com 70% 80% capacity must fast charge 7 Does stalled servo ruin battery monly called venting situation usually properly carefullystudy manufac- stalled servo draws about 400 mA there- doesnt happen unless cells have fast turers instructions fore discharging battery very quickly charged accidentally short-circuited Should 4 What effect does temperature have Quite itself does cause damage battery suspect has happened check loss OUT OF THE ASHES .. THE WINNERS CIRCLE PHOENIX SPAN 132 AREA 1047 SQ IN WEIGHT 7276 OZ AJFlFOIL 84061 WiNGLOAD 10 OZISQ FT ASPECT RATIO 1671 ______________________ COMPETITION PRODUCTS -1-921 BIRDIE WAY APOLLO BEACH FL 33872 ____________FOR ADDONAL INFORMAllON SEND LBASE813 845 5171 January 1990159 td Co aiIn*t nmn~ Only certihed checks money orders accepted Minimum order S 1200 ihme packages old Pomerpoles $350 per package tisO shipping handling CT residents add 75% sales las Prices sobiect chasge notice DEALER IF4OUtAIES INVITED tother intormalion dealer onces send SASE Rosiness Card SERMOS RIC SNAP CONNECTORSInc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 Smal stanwed aett-sddrcind cowiope tar pncusa individual cfsnisicns Add 5300 fir COD Parrish Aircraft & Scale Models 1125 SW 4*bTefhntstloe1 333tT 305 581 4477 SAVE YOUR FIELD SNUF-LER muffler Ia low cost easy install lightweight sound reducing muffler no performance penalty answer AMA muffler rule suggestions saving flying fields Meets AMA muffler rule suggestions SNUF-FLERTM 3 10 decibels quieter stock muffler MUFFLER No power loss wIth possible 300-500 RPM increase patented Improves engine idle s better fuel economy Easily attached 25-108 stock mufflers Heat corrosion resistant Black E coat finish No special adapters required Weighs 35 025 Fits ASP BRAT ENYA FOX HP IRVINE K & B 05 MAX ROYAL VS SUPER TIGRE mufflers II available hobby shop ORDER DIRECT immediate shipment Check MO Visa MC. CODSEND 2Sf STAMP accepted Add$250 tsr UPS $200 COD and6% salestasFOR ADDITIONAL INFO Lfor Cald reodentAND JTEC CATALOG capacity discharger 11 aviv need cycle battery Yes Repeated charge discharge cycles low current levels such experience RC tend form active materials cells large crystals thus lessening active surface area Although does affect capacity battery does tend reduce discharge voltage can adversely affect operation equipment course time Perform ning few controlled cycles higher charge discharge rate reduces crystals effectively re vitalizing battery Discharging 11 volts per cell considered full discharge battery cycler available few dis charges through controlled discharger de scribed below time followed 24-hour charge radios 50 mA charger pro vide acceptable quite efficient alter native cycling should performed once twice year depending much use equipment 12 What happens cell goes down cases unless battery has severely mistreated will have caused inadequate charging ie trying recharge amount battery has dis charged Because charging about 70% ef ficient takes 14 15 hours put back 500 mA safer regard cells being fully discharged time used individual cells battery slightly different capacities weakest cell ie. lowest fully recharged time will start lag behind others capac ity Eventually lag will cause cell dis charge completely partway through discharge cycle entire battery pack results will obviously disastrous happens flight Normally condition one-cell discharge will cause cell reverse its polarity thus lowering batterys voltage over two volts unless left state long period se vere permanent damage should result partic ularly pencells Recharge check bat tery described above remember fully charge time future 13 can check capacity bat tery cvcler Build controlled dis charger can made quite simply requir ing few resistors spare charger plugs voltmeter stopwatch circuit de scribed below discharges about 230-240 milli amps uses cheap resistors can built about hour operate instructions receiver transmitter instructions brackets [I After charging battery least 15 hours connect voltmeter points B [A C] discharger connect dis Rx Jack resistors 820 5% Unit de signed discharge ONE pack time Av erage current drain about 240 mA charger plug appropriate battery volt meter should read 5-6 volts [10-12 volts] will drop about 475 [95] volts over next 90 minutes As endpoint reached will drop about 45 [901 volts over 10minute period drop 44 [88] volts over five minutes final useful voltage Disconnect battery make note total time discharge Around 120 minutes indicates good battery Much less indicates low capacity low capacity suspected recharge battery 15 hours repeat discharge During discharge check voltage 10 minutes until voltage drop begins ac celerate watch closely making sure disconnect 44 [88] volts Keep record discharge times comparison future checks possible equip yourself battery cycler like Ace RIC Inc Digipace BB cycler much preferred over manual discharger because does everything described above automatically recharges both packs discharge cycle completed cost crashed model much price cycler RC Pylon Racing/Hager Continued page 55 RPM Header only16000-16100 pipe 15200 Comments Picco Q500 engine uses upper-end parts piston cylinder liner conrod wrist pin same catalog numbers shown rear-intake marine/FAI/Formula version liner has approximately 1800 ex haust duration puts piped sleeve category above results show Rossi gets very little boost pipe Picco gets plenty Rumor has Webra engines also run much better pipe havent tested yet Anybody got theyd like loan testing other hand stock Picco pipe ap pears long enough help en gine actually detune hold back Somewhere between stock MACS pipe length stock Picco pipe length predict 160 Model Aviation plane desogned meet QSPRA Fonnula 120 nales 1/4 scalemodel accepts 60120 ci engines Features Epoxy glass fuselage foam wing contnaction Dursi landing gear scale landing gear add $1500 erharK wS MINI-JET SERIES planes feature balsa constmction Designed intermediate flyer mind will accept 25 32 size engine uses rear exhaust engine exceptional perfomance Get thrill jet hassles ducted fan $5 AACI Win5 Spain Laigmud -0 nisjn ins osity fly Wim sina 720 sq si Bns 454 cycle ir40 2 cycle also amitable fcx tarp electric mum Plans Cowling andAmg Ribs also sold Full kit $8500 Please add $400 shipping turn printer mote airfoil plotter FOILED AGAIN! OT AIRFOILS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 ZZ o,,ooJOMdofrf US$50 Rqo OMPC 7AT,p,rbie-C, opo0O po0 pro 0lS5ro~7 dop pwlI 525 354okUIUm S,fr ko,.oyod,w CYGNET Software 24843 Del Prado #141b Dana Point CA 92629
Edition: Model Aviation - 1990/01
Page Numbers: 52, 53, 157, 158, 159, 160
ORBITER name Hand-Launch Glider kit Dodgson Designs quite de parture Boh Dodgson two reasons First designed Bob Erie Jackson Portland second its built-up wood con struction instead Bobs normal fiberglass-andfoam technology H-L Gliders gaining more adher ents because theyre great way getting few flights during lunch Also can learn thermal planes up 15 ft thermal ing 150 ft seems like piece cake Eric flew Orbiter Nats H-L event finished fifth behind some pretty heavy competi tion likes Wurts Martin Jolly Har ris ship has 59-in span 432 sq area Selig 4061 airfoil weighs 17 18 oz miniradio three servos Whats unusu al Hand-Launcher features ailerons roll control flaps optional report Bobs Second Wind bian nual newsletter After flying season flapped version Orbiter Eric has some sights using flaps really light lift cant quite climb out marginal thermal Eric cracks little positive flap about %2 root trailing edge allows him turn tighter fly slower climb faster positive flap elevator compensation also gives him effect slight Up elevator maxes Nats Eric reflexed flaps thermaled plane inverted about half max Eric says hasnt found reflexing TE increases launch height usually launches neutral flap really light air sometimes launches %2 positive flap going back neutral just before tops out Orbiter kit $65 plus shipping Its best send two stamps Bob complete catalog mailing info Second Wind newsletter published twice year $1 per copy cash OK contains tidbits interest espe cially Dodgson Designs kit fansof number steadily growing Thermal contest fliers have found Bobs Lovesong tough ship beat address 21230 Damson Road Bo thell WA 98021 modeler steps up October 1989 col umn pumped Oly II pilots consider mov ing up Sagitta gitta fliers advanc ing aileron ships Going more ca pable planes think biggest kicks can experience fantastic hobby column used analogy full-size Soar mg ie transition trainers up 15Meter Unlimited racing ships pitch prompted Bill Anderson Laguna Niguel CA write Ive never written before enjoy col umn MA very much Ive Sailplanes 25 years have fun enjoy ment still reason letter column about full-size Sailplanes think must have gotten Schweizers mixed up Although some 2-22s around its 233 main trainer new glider pilots 1-35 built Standard Class com petition ship intermediate type happen know little about Schweizers because own SGS l-26E serial number 518 Al though Ive full-size soaring year know 1-35 ship can jump trainer 1-26 considered intermediate 1-35 might interested know rea son got full-size soaring because ing some research Scale RC project Steve Moskals 1-26 construction article February 1988 issue Model Avia tion took ride signed up lessons soloed about 15 hours began looking own 1-26E located purchased good Mo desto CA 1-26 Well its favorite ships long time Steves construction article appeared MA just start building seeing full-size ship knew would just matter time until got flew Its great ship Quick responsive thermals best joy fly thrill minute model flies just like big fly off slope Harley Michaclis newest designs span spectrum technology Experimental Roto 1 L uses pivoting wings roll longitudinal el evator control Wing also has camber-changing flaps Stabilizer fixed position Hed like other modelers try scheme infor mation column Easy Eagle R Two-Meter trainer kitted Ace RIC Inc Control surface hinging via Harleys rubber hinges Dodgson Designs newest kit Eric Jackson-designed Orbiter Hand-Launch Sailplane Flat wing tells uses aileronsunusual ship size Flaps optional Eric R did very well 89 Nats Kit sells $65 plus shipping Its wood built up 52 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 agree about progressing models higher performance Its lot fun challenging Im enclosing two pics model other full-size 1-26 kind letter love get nec essarily bits pointing out slips because Bills experience shows closely modeling full-size soaring can come together Its either/or situation Id bet model Sailplane fliers all-around aviation nuts would jump chance try full-size too could would interesting hear fliers both Harley Michaelis retired insurance agent Walla Walla WAbut should have aero engineer because hes mechanical ge nius Harleys Roto experimental ship designed test wing system incorporates twist wings roll pitch control plus flaps Think about minute wings rotate opposite directions aileron roll action ro tate together elevator pitch control top full-span flaps can used camber-changing time Harley showed Roto 1 Richland Fun-Fly Roll pitch work off two servos transmitter elevon mixing capability third servo all-mechanical flap system dont ask explain worksall know does Harley flight testing Roto 1 would like few experienced Sailplane fliers join forces him continuing development program would involve building test flying Roto experimental planes reporting results back Harley Obviously program isnt faint heart Only first-class scratchbuilders lots time skill need apply Harley has made up information packet contains discussion sheets drawings vari ous linkages scale drawings Roto etc readers interested receiving packet Harley would like send him $3 cover postage copying costs self-addressed 9 x 12-in envelope address 26 South Roose velt Walla Walla WA 99362 Harley also sent better picture Easy Ea gle trainer described September col umn very practical-looking Two-Meter kit features flaps new Selig 7032 air foil Harley course uses rubber Harleys Hinges Easy Eagle work great Both kit hinges manufactured Ace R/C Inc available local hobby shop Soaring handicaps Most people familiar Continued page 157 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Attractive case included ...~Wraparound frame fits comfortably over mast prescription glasses Blocks harmful ultraviolet radiation Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available in Clear shop work 81325 Amber overcast days & late afternoons S1495 Gray S1495 & Mirror Si 995 sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved bim serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer ____________Pikes Peak RC Club Prices include shipping handling E9Jpiii See hobby dealer first inininin doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 SCALE RADIO CONTROL 0 VINTAGE sizes2hz 3/431/i 133/4 11443/i 1A5 1/61/a WHE CONTROL-UNE SMOOTH CONTOUR 3/4234 1314 114334 11/24/z 214514 VISA/MC ELS FREE-FUGHT 00 GOLDEN AGE sizes214 31/a 1334 11443/a 11/25 17/a6/z NEW BALLOON 2hz4hz 314514 3 34 January 1990 53 Bill Anderson wanted some Scale re search -scale Schweizer 1-26B model building AboveMA Febru ary 88Plan No 578 went air port got ride full-scale Sailplane loved much went get pilots license bought used 1-26E Below SUCKER-KIT55995 tiVHS Show & Tell Video $3995 Add $400 shipping & handling MI residents add 40/0 sales tax 0 C c 5Send 3100 SASE Icr producl lid samples real weed veneer skins Product List Includes Gapless Arrow Shall Hinges carbon Tow Mylar Sheet E -Tech items er Inquires Welcome C SEND CHECK OR MONEY RDER TO J'5 -sPO Box 866 0 Lapeer Ml 48446 313 664-3330 imposits Aircraft Eng & SupplyFAX 664-9780 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog theac other kite accessories ~ ~DEPT MA PAWNEE ST SAN MARCOS CA 9 words optically coupled speed controls must designed way scratch Sorry Please re fer December 1989 column discus sion about installing RF chokes Other reader reaction has taken two sides writing no problems nonoptically coupled controls noth ing problems guess someone has installation noise-free despite hardwired optically coupled speed control its very hard understand optical isolation would ever needed contrary fashion motor noise problems quite aware unpleasant sometimes downright nasty situation can Remember different power systems speed controls radios can act react completely differently fact Ive seen two receivers same manufacture type function differently respect motor noise So fortunate have no such problems please dont conclude gen eral no such problems did youd dead wrongand could happen very next system since should reading some what just prior holidays please accept sincere wishes very happy holiday season great Electric New Year RC Soaring/Blakeslee Continued page 53 handicapping systems used bowling golf hadnt heard being used Soaring until read about Diablo Valley Soar ing Societys new system club contests fine newsletter Thermal Tales Co-editor Pete Thompson explains works executive committee decided needed some way fledglings less experienced fliers feel less intimidated better per forming pilots whole idea course encourage participation have fun club contests Accordingly club has adopted handicap system club contests lieu class system have employed date Objectives 1 Permit members varying skill lev els variable performance capabilities com pete together relatively equal chance winning 2 Provide vehicle assigning members teams desired 3 system should responsive individuals current performance System 1 Normalized score actual raw score di vided perfect score times 1000 2 Fliers average mean last four normalized scores 3 Handicap computed 70% differ ence between fliers average 950 4 Handicap added pilots normalized score determine final score 5 Annual championship determined adding nine best final scores during year Other miscellaneous facets DNF did finish day will included fourmonth rolling average although would part season total Popoffs should allowed everyone handicap over some number like 100 150 Fledglings may turn trans mitters over experienced fliers get out trouble long returned pi lots safe control recovered Handicaps calculated first Diablo Val ley contest under new format ranged low 6 Bob McGowan up high 257 As turned out Bob off day raw score 748 So final score 754 other hand Don Anthony hot day scoring 954 scratch would have won him contest handicaps adding 168 handicap gave him final score 1122 points big winning margin Pete says go ing evaluate system worked 89 maybe reset some parameters 1990 Any other clubs want give try Sportsman Multi-Task news Feedback just starting come SMT activities As probably know 1990 will SMT develop mental year encouraging clubs add some type Distance Speed task traditional Thermal Duration contests lots ways Speed Distance tasks can run below make things equal less intimidating Sportsman fliers SMT Committee recommends 75-oz limit planes Id like print couple recently received items just give flavor whats happen ing first letter Ray Hayes Secre tary LSF After reading October column couldnt resist sending attached article Ray sent copy Dan Pruss Soaring column February 1980 issue Model AviationBE putting SMT contest today Id use --maicnea rerormance system TOP PERFORMANCE K&B tNGINES AirplaneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POXY RtSIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS January 1990 157 NATIONAL CHAMPION ** THE PIXY HAS DONE IT AGAIN IT WON THE US NATIONALS IN 1989 JUST AS IT DID IN 1985 ESTABLISHING THE PIXY AS THE TOP 2-METER COMPETITION GLIDER TODAY DAVE BANKS IS THE WINNING PILOT FOUR OTHER PIXYS TROPHIEDI 4 MATS WINNERS DAVE BANKS PIXY * laad*lrnpoloeawswoatdsg * * U-AammI Newelettor SECOND WID Ia Now Available SI par year * 21230 Damson Road Bothell WA 98021 206-778-8067 Put Fun Back Fun Fly Get ROUN TUIT Today Its round sflat flies 30 Flying DISC STOL SUPERIOR Small Field FLY Aircraft STABLE PREDICTABLE EtAGILE $43plus *4 shipping TX Res add 7% sales tax VISA Foam ft Lite Ply Construction ELE VON Mixer Included 25- 4B cid 3-3Slbs Accurate QUALITY Materials Wing span 64 semi-symmetrical Wing area 736 sq Length 45 Weight 41/2 5 lbs Engine 35 40 TS 4 channel radio reauired SCEPTER Fast Highly Aerobatic Sport Plane Wing span 60 semi-symmetrical Wing area 540 sq Length 42 1/2u Weight 5-5 /2 lbs Engine 45-60 TS 4 channel radio required Certified Checks money orders Michigan Residents add 4% sales tax Personal checks Allow 2 weeks clear COD add $300 ign Add $1500 MODELS INC 285 FIRST ST PO BOX 130 FREELAND MI 48623 517 695-5385 Man turer Hi Performaftbtati andraft CULPEPPEE C MODELS INC 2526 Washington DubuqueIA 52001 3191583-4530 SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dealer/Diatrlbutor Inquirm. Invited Pier di Re dents Add 6% Sales Tan original format described Dan single change very efficient contes tants enjoyed emphasis Distance best part about current interest SMT taking positive step using organizersupplied winches rather trying change current F3B rules Proving theres nothing new under sun 1979 Ray Fort Wayne LOFT gang put sizeable F3B-type contest incorporated ideas talking about now Ray didnt have restrictions planes must remembered still early years RC Soaring An interesting sidelight about contest famous Airtronics Sagitta introduced Lee Renaud given prototype Sagitta kits nine top pilots condition fly LOFT contest nine Dwight Holley went win World Championship 1981 Gobbler 1979 Sagitta considered pretty hot F3B ship Remember 1977 Skip Miller won first Soaring World Championships Airtronics Aquila Today fully sheeted straight wings addition ailerons Sa gitta would make fine SMT plane highlights Ray ran contest e round consisted Speed Distance task Duration Distance task putting emphasis Distance Three organizer-supplied winches used No working times used e No man-on-man scoring used flight scored against best flight task Speed flown rotation time Distance flown two time using four-minute flight time Dura tion flown three time using F3B Six-Minute Precision So Ray said format would still good way hold SMT contest Manpower flagger requirements Distance reduced because two planes flown time next news quickly grabbed attention SOAR club Chicago newsletter ed ited Tom Kallevang August Jim McCar thy held SOAR Sportsman F3B contest novel twists Speed run minimum cap 30 seeFIBERGLASS PARTS Carry over 300 cowls 70 wheel pants made epoxy glass lightweight brittle zero pnholes Send SASE $100 latest cataloa onds did exactly 30 seconds got 1000 points did under 30 seconds still got 1000 points Times over 30 seconds normalized 30-second cap lowest time happened over 30 seconds didnt happen contest e Distance run three set target levels six eight 10 laps per round first round target six laps made six laps scored 1000 points target next round eight laps didnt get six laps target stayed six laps etc Duration per F3B rules working time flown man-on-man love see kind stuff shows guys putting ol gray matter work inking up new original ways run Speed Distance tasks Ive heard max imum caps speed task like 35 40 sec onds admit never thought mini mum cap idea Also increasing target laps Distance very imaginative ideas good because keep Sportsman pilots thick contest Lets hear about club running SMT contests Understanding Ni-Cds following article Brian Chan appeared South Bay SS newslet ter under heading Low-Tech Stuff Everything wanted know about Ni-Cds afraid ask John Dvorak edits excel lent Silent Flyer newsletter has tradition printing informative original articles think timely review Ni-Cd batter ies because us colder climes can use slack time make sure packs top shape Brian known Dr Chan friends because skill stitching up sick ships Most RC modelers use Ni-Cd batteries radios yet few seem understand well rest equipment article about workings Ni-Cds digging too deeply technical explanations goal help prevent premature battery failure keep explanations simple well discuss 500-600 milliamp-hour cells come RC systems Fast-charging RC car Elec tric flight power packs require different treatment 158 Model Aviation ! DOUBLE VISION! THE iWO IN ONE TRAINER STABLE HIGH WING PLANE AND AEROBATIC LOW WING ALL IN THE SAME KIT CI areor scralcfl Oulloer SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set todayl See Dealer Cataloger Order lIf dont carry Sgaare tst Tasla call pay far call well pay far shipping us sad Canadal C 00 Eatra r & D FIBERGLASS SPECIAL 38624 Mt Kisco Sterling Hgts MI 48310 Call Us 313 978-2512 *New Owners * Steve & Km Durecki z PRACTICAL SIZED GIANT SCALE MODEL PLANS F bergiass Cowlings Canapes Ava ab e F-i5 Span 77 DC-31 1/2 1140Span$4200 F4U CORSAIR2 1/4 193Span$3000 A6M5 ZERO2 1/2 191Span$3000 Plans RK-20 CURTIS P402 1/2 194Span$3000 K-740 Ducted Fans AT-6 TEXAN24 1101Span$3000 ntom 35 Span SIO00 F8F BEARCAT2 112 186Span$3000 gen 32 Span $1000 FOKKER DR-i27 163Tripe$2700 5 36 Span $1000 ___________________________________________Catalog Plans Accessories Supplies n Canopy $1500 Order FromCredited First Order $25 More_______________________ Nick Ziroli29 Edgar Dr Smithiown NY 11787 USA516-234-5038 1 long should batteries charge lot Room temperature efficient remains state discharge damage can normal 50-60 milliamp chargers charging charging temperature although 50 -90 F quite caused cell reversal should 14-16 hours no matter little bat- acceptable Charging extreme temperature can 8 What about accidental reverse charging tery has used previous discharge cause damage Discharge rates reason- inadvertent complete discharging Complete ensures cells fully charged able 0 120F efficient dis- discharging under load will probably cause time entails no risk damage due charge temperature about 90 freezing cells reverse polarity will reverse overcharge able hand point Ni-Cds lose about 10-15% capac- charging low rates may cause perma end period charge few hours ity nent damage Charge battery 24 hours dis longer rather stoping early 100-hour over- 5 much discharge time can expect charge through controlled discharger battery charge C/10 rateC being amp-hour freshly charged batteries Most transmitters cycler recharge 15 hours again dis rating will cause damage battery use about 150 milliamps gives about three charge through discharger Time final dis has left completely discharge 24-hour hours switched-on time although new com- charge ascertain damage has caused charge advisable time charge puter transmitters might have higher current have occasion accidentally left night before want use model Ni-Cds draw Flight pack durations vary enormously ac- transmitter on occasion batslowly lose charge its best charge un- cording use receiver itself draws 10 tery fully recovered til intend fly to 20 milliamps servo motors draw con- 9 deal memory after re 2 long batteries keep charge siderably series experiments pro- peated partial discharging soand should top off charge model duced following results should called memory effect does happen prac stored winter Sintered cylindrical cells treated very general guide tice Yes surprised too learned pencells will self-discharge room tempera- Two-channel Thermal Sailplane intermit- manufacturers say unable pro ture about 20% per month completely dis- tent stick usel00 mA average current draw duce effect except carefully controlled lab charged four five months prob- five-hour expected battery time tests conclude must effect ob lem can stored state charge al- Four-channel Thermal Sailplane served before battery-manufacturing technology indefinitely significant loss life servo continuously used three servos intermittent reached todays standards Topping-off unnecessaryperhaps waste- use150-200 mA average current draw 25- 10 What does mean crystals form ful Just charge completely discharged packs 3-hour expected battery time cells usually quite harmless 24 hours before use F3B-type Sailplane six servos continu- caused minute porosity sealing ring 3 Should fast charging trickle charging ous use270-330 mA average current draw 1 s- Electrolyte reacts carbon dioxide air used No Stick standard C/l0 rate 50 2-hour expected battery time forms crystals potassium carbonate Wipe 60 milliamp charge Trickle charging may re- 6 What life expectancy battery crystals off dry cloth smear little duce useful capacity cells particularly Most Ni-Cds will last 800 000 complete cy- silicone grease prevent further growth used continuously Fast charging well des cells partially discharged Crystals may also form around safety risking reduction battery life capacity cycle life expectancy substantially in- vent cells have abused gross overwhen properly controlled inefficient Man- creased After periods mentioned cells charge overdischarge causing valve ufacturers usually recommend charging useless capacities reduced open lose little electrolyte com 70% 80% capacity must fast charge 7 Does stalled servo ruin battery monly called venting situation usually properly carefullystudy manufac- stalled servo draws about 400 mA there- doesnt happen unless cells have fast turers instructions fore discharging battery very quickly charged accidentally short-circuited Should 4 What effect does temperature have Quite itself does cause damage battery suspect has happened check loss OUT OF THE ASHES .. THE WINNERS CIRCLE PHOENIX SPAN 132 AREA 1047 SQ IN WEIGHT 7276 OZ AJFlFOIL 84061 WiNGLOAD 10 OZISQ FT ASPECT RATIO 1671 ______________________ COMPETITION PRODUCTS -1-921 BIRDIE WAY APOLLO BEACH FL 33872 ____________FOR ADDONAL INFORMAllON SEND LBASE813 845 5171 January 1990159 td Co aiIn*t nmn~ Only certihed checks money orders accepted Minimum order S 1200 ihme packages old Pomerpoles $350 per package tisO shipping handling CT residents add 75% sales las Prices sobiect chasge notice DEALER IF4OUtAIES INVITED tother intormalion dealer onces send SASE Rosiness Card SERMOS RIC SNAP CONNECTORSInc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 Smal stanwed aett-sddrcind cowiope tar pncusa individual cfsnisicns Add 5300 fir COD Parrish Aircraft & Scale Models 1125 SW 4*bTefhntstloe1 333tT 305 581 4477 SAVE YOUR FIELD SNUF-LER muffler Ia low cost easy install lightweight sound reducing muffler no performance penalty answer AMA muffler rule suggestions saving flying fields Meets AMA muffler rule suggestions SNUF-FLERTM 3 10 decibels quieter stock muffler MUFFLER No power loss wIth possible 300-500 RPM increase patented Improves engine idle s better fuel economy Easily attached 25-108 stock mufflers Heat corrosion resistant Black E coat finish No special adapters required Weighs 35 025 Fits ASP BRAT ENYA FOX HP IRVINE K & B 05 MAX ROYAL VS SUPER TIGRE mufflers II available hobby shop ORDER DIRECT immediate shipment Check MO Visa MC. CODSEND 2Sf STAMP accepted Add$250 tsr UPS $200 COD and6% salestasFOR ADDITIONAL INFO Lfor Cald reodentAND JTEC CATALOG capacity discharger 11 aviv need cycle battery Yes Repeated charge discharge cycles low current levels such experience RC tend form active materials cells large crystals thus lessening active surface area Although does affect capacity battery does tend reduce discharge voltage can adversely affect operation equipment course time Perform ning few controlled cycles higher charge discharge rate reduces crystals effectively re vitalizing battery Discharging 11 volts per cell considered full discharge battery cycler available few dis charges through controlled discharger de scribed below time followed 24-hour charge radios 50 mA charger pro vide acceptable quite efficient alter native cycling should performed once twice year depending much use equipment 12 What happens cell goes down cases unless battery has severely mistreated will have caused inadequate charging ie trying recharge amount battery has dis charged Because charging about 70% ef ficient takes 14 15 hours put back 500 mA safer regard cells being fully discharged time used individual cells battery slightly different capacities weakest cell ie. lowest fully recharged time will start lag behind others capac ity Eventually lag will cause cell dis charge completely partway through discharge cycle entire battery pack results will obviously disastrous happens flight Normally condition one-cell discharge will cause cell reverse its polarity thus lowering batterys voltage over two volts unless left state long period se vere permanent damage should result partic ularly pencells Recharge check bat tery described above remember fully charge time future 13 can check capacity bat tery cvcler Build controlled dis charger can made quite simply requir ing few resistors spare charger plugs voltmeter stopwatch circuit de scribed below discharges about 230-240 milli amps uses cheap resistors can built about hour operate instructions receiver transmitter instructions brackets [I After charging battery least 15 hours connect voltmeter points B [A C] discharger connect dis Rx Jack resistors 820 5% Unit de signed discharge ONE pack time Av erage current drain about 240 mA charger plug appropriate battery volt meter should read 5-6 volts [10-12 volts] will drop about 475 [95] volts over next 90 minutes As endpoint reached will drop about 45 [901 volts over 10minute period drop 44 [88] volts over five minutes final useful voltage Disconnect battery make note total time discharge Around 120 minutes indicates good battery Much less indicates low capacity low capacity suspected recharge battery 15 hours repeat discharge During discharge check voltage 10 minutes until voltage drop begins ac celerate watch closely making sure disconnect 44 [88] volts Keep record discharge times comparison future checks possible equip yourself battery cycler like Ace RIC Inc Digipace BB cycler much preferred over manual discharger because does everything described above automatically recharges both packs discharge cycle completed cost crashed model much price cycler RC Pylon Racing/Hager Continued page 55 RPM Header only16000-16100 pipe 15200 Comments Picco Q500 engine uses upper-end parts piston cylinder liner conrod wrist pin same catalog numbers shown rear-intake marine/FAI/Formula version liner has approximately 1800 ex haust duration puts piped sleeve category above results show Rossi gets very little boost pipe Picco gets plenty Rumor has Webra engines also run much better pipe havent tested yet Anybody got theyd like loan testing other hand stock Picco pipe ap pears long enough help en gine actually detune hold back Somewhere between stock MACS pipe length stock Picco pipe length predict 160 Model Aviation plane desogned meet QSPRA Fonnula 120 nales 1/4 scalemodel accepts 60120 ci engines Features Epoxy glass fuselage foam wing contnaction Dursi landing gear scale landing gear add $1500 erharK wS MINI-JET SERIES planes feature balsa constmction Designed intermediate flyer mind will accept 25 32 size engine uses rear exhaust engine exceptional perfomance Get thrill jet hassles ducted fan $5 AACI Win5 Spain Laigmud -0 nisjn ins osity fly Wim sina 720 sq si Bns 454 cycle ir40 2 cycle also amitable fcx tarp electric mum Plans Cowling andAmg Ribs also sold Full kit $8500 Please add $400 shipping turn printer mote airfoil plotter FOILED AGAIN! OT AIRFOILS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 ZZ o,,ooJOMdofrf US$50 Rqo OMPC 7AT,p,rbie-C, opo0O po0 pro 0lS5ro~7 dop pwlI 525 354okUIUm S,fr ko,.oyod,w CYGNET Software 24843 Del Prado #141b Dana Point CA 92629
Edition: Model Aviation - 1990/01
Page Numbers: 52, 53, 157, 158, 159, 160
ORBITER name Hand-Launch Glider kit Dodgson Designs quite de parture Boh Dodgson two reasons First designed Bob Erie Jackson Portland second its built-up wood con struction instead Bobs normal fiberglass-andfoam technology H-L Gliders gaining more adher ents because theyre great way getting few flights during lunch Also can learn thermal planes up 15 ft thermal ing 150 ft seems like piece cake Eric flew Orbiter Nats H-L event finished fifth behind some pretty heavy competi tion likes Wurts Martin Jolly Har ris ship has 59-in span 432 sq area Selig 4061 airfoil weighs 17 18 oz miniradio three servos Whats unusu al Hand-Launcher features ailerons roll control flaps optional report Bobs Second Wind bian nual newsletter After flying season flapped version Orbiter Eric has some sights using flaps really light lift cant quite climb out marginal thermal Eric cracks little positive flap about %2 root trailing edge allows him turn tighter fly slower climb faster positive flap elevator compensation also gives him effect slight Up elevator maxes Nats Eric reflexed flaps thermaled plane inverted about half max Eric says hasnt found reflexing TE increases launch height usually launches neutral flap really light air sometimes launches %2 positive flap going back neutral just before tops out Orbiter kit $65 plus shipping Its best send two stamps Bob complete catalog mailing info Second Wind newsletter published twice year $1 per copy cash OK contains tidbits interest espe cially Dodgson Designs kit fansof number steadily growing Thermal contest fliers have found Bobs Lovesong tough ship beat address 21230 Damson Road Bo thell WA 98021 modeler steps up October 1989 col umn pumped Oly II pilots consider mov ing up Sagitta gitta fliers advanc ing aileron ships Going more ca pable planes think biggest kicks can experience fantastic hobby column used analogy full-size Soar mg ie transition trainers up 15Meter Unlimited racing ships pitch prompted Bill Anderson Laguna Niguel CA write Ive never written before enjoy col umn MA very much Ive Sailplanes 25 years have fun enjoy ment still reason letter column about full-size Sailplanes think must have gotten Schweizers mixed up Although some 2-22s around its 233 main trainer new glider pilots 1-35 built Standard Class com petition ship intermediate type happen know little about Schweizers because own SGS l-26E serial number 518 Al though Ive full-size soaring year know 1-35 ship can jump trainer 1-26 considered intermediate 1-35 might interested know rea son got full-size soaring because ing some research Scale RC project Steve Moskals 1-26 construction article February 1988 issue Model Avia tion took ride signed up lessons soloed about 15 hours began looking own 1-26E located purchased good Mo desto CA 1-26 Well its favorite ships long time Steves construction article appeared MA just start building seeing full-size ship knew would just matter time until got flew Its great ship Quick responsive thermals best joy fly thrill minute model flies just like big fly off slope Harley Michaclis newest designs span spectrum technology Experimental Roto 1 L uses pivoting wings roll longitudinal el evator control Wing also has camber-changing flaps Stabilizer fixed position Hed like other modelers try scheme infor mation column Easy Eagle R Two-Meter trainer kitted Ace RIC Inc Control surface hinging via Harleys rubber hinges Dodgson Designs newest kit Eric Jackson-designed Orbiter Hand-Launch Sailplane Flat wing tells uses aileronsunusual ship size Flaps optional Eric R did very well 89 Nats Kit sells $65 plus shipping Its wood built up 52 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 agree about progressing models higher performance Its lot fun challenging Im enclosing two pics model other full-size 1-26 kind letter love get nec essarily bits pointing out slips because Bills experience shows closely modeling full-size soaring can come together Its either/or situation Id bet model Sailplane fliers all-around aviation nuts would jump chance try full-size too could would interesting hear fliers both Harley Michaelis retired insurance agent Walla Walla WAbut should have aero engineer because hes mechanical ge nius Harleys Roto experimental ship designed test wing system incorporates twist wings roll pitch control plus flaps Think about minute wings rotate opposite directions aileron roll action ro tate together elevator pitch control top full-span flaps can used camber-changing time Harley showed Roto 1 Richland Fun-Fly Roll pitch work off two servos transmitter elevon mixing capability third servo all-mechanical flap system dont ask explain worksall know does Harley flight testing Roto 1 would like few experienced Sailplane fliers join forces him continuing development program would involve building test flying Roto experimental planes reporting results back Harley Obviously program isnt faint heart Only first-class scratchbuilders lots time skill need apply Harley has made up information packet contains discussion sheets drawings vari ous linkages scale drawings Roto etc readers interested receiving packet Harley would like send him $3 cover postage copying costs self-addressed 9 x 12-in envelope address 26 South Roose velt Walla Walla WA 99362 Harley also sent better picture Easy Ea gle trainer described September col umn very practical-looking Two-Meter kit features flaps new Selig 7032 air foil Harley course uses rubber Harleys Hinges Easy Eagle work great Both kit hinges manufactured Ace R/C Inc available local hobby shop Soaring handicaps Most people familiar Continued page 157 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Attractive case included ...~Wraparound frame fits comfortably over mast prescription glasses Blocks harmful ultraviolet radiation Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available in Clear shop work 81325 Amber overcast days & late afternoons S1495 Gray S1495 & Mirror Si 995 sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved bim serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer ____________Pikes Peak RC Club Prices include shipping handling E9Jpiii See hobby dealer first inininin doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 SCALE RADIO CONTROL 0 VINTAGE sizes2hz 3/431/i 133/4 11443/i 1A5 1/61/a WHE CONTROL-UNE SMOOTH CONTOUR 3/4234 1314 114334 11/24/z 214514 VISA/MC ELS FREE-FUGHT 00 GOLDEN AGE sizes214 31/a 1334 11443/a 11/25 17/a6/z NEW BALLOON 2hz4hz 314514 3 34 January 1990 53 Bill Anderson wanted some Scale re search -scale Schweizer 1-26B model building AboveMA Febru ary 88Plan No 578 went air port got ride full-scale Sailplane loved much went get pilots license bought used 1-26E Below SUCKER-KIT55995 tiVHS Show & Tell Video $3995 Add $400 shipping & handling MI residents add 40/0 sales tax 0 C c 5Send 3100 SASE Icr producl lid samples real weed veneer skins Product List Includes Gapless Arrow Shall Hinges carbon Tow Mylar Sheet E -Tech items er Inquires Welcome C SEND CHECK OR MONEY RDER TO J'5 -sPO Box 866 0 Lapeer Ml 48446 313 664-3330 imposits Aircraft Eng & SupplyFAX 664-9780 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog theac other kite accessories ~ ~DEPT MA PAWNEE ST SAN MARCOS CA 9 words optically coupled speed controls must designed way scratch Sorry Please re fer December 1989 column discus sion about installing RF chokes Other reader reaction has taken two sides writing no problems nonoptically coupled controls noth ing problems guess someone has installation noise-free despite hardwired optically coupled speed control its very hard understand optical isolation would ever needed contrary fashion motor noise problems quite aware unpleasant sometimes downright nasty situation can Remember different power systems speed controls radios can act react completely differently fact Ive seen two receivers same manufacture type function differently respect motor noise So fortunate have no such problems please dont conclude gen eral no such problems did youd dead wrongand could happen very next system since should reading some what just prior holidays please accept sincere wishes very happy holiday season great Electric New Year RC Soaring/Blakeslee Continued page 53 handicapping systems used bowling golf hadnt heard being used Soaring until read about Diablo Valley Soar ing Societys new system club contests fine newsletter Thermal Tales Co-editor Pete Thompson explains works executive committee decided needed some way fledglings less experienced fliers feel less intimidated better per forming pilots whole idea course encourage participation have fun club contests Accordingly club has adopted handicap system club contests lieu class system have employed date Objectives 1 Permit members varying skill lev els variable performance capabilities com pete together relatively equal chance winning 2 Provide vehicle assigning members teams desired 3 system should responsive individuals current performance System 1 Normalized score actual raw score di vided perfect score times 1000 2 Fliers average mean last four normalized scores 3 Handicap computed 70% differ ence between fliers average 950 4 Handicap added pilots normalized score determine final score 5 Annual championship determined adding nine best final scores during year Other miscellaneous facets DNF did finish day will included fourmonth rolling average although would part season total Popoffs should allowed everyone handicap over some number like 100 150 Fledglings may turn trans mitters over experienced fliers get out trouble long returned pi lots safe control recovered Handicaps calculated first Diablo Val ley contest under new format ranged low 6 Bob McGowan up high 257 As turned out Bob off day raw score 748 So final score 754 other hand Don Anthony hot day scoring 954 scratch would have won him contest handicaps adding 168 handicap gave him final score 1122 points big winning margin Pete says go ing evaluate system worked 89 maybe reset some parameters 1990 Any other clubs want give try Sportsman Multi-Task news Feedback just starting come SMT activities As probably know 1990 will SMT develop mental year encouraging clubs add some type Distance Speed task traditional Thermal Duration contests lots ways Speed Distance tasks can run below make things equal less intimidating Sportsman fliers SMT Committee recommends 75-oz limit planes Id like print couple recently received items just give flavor whats happen ing first letter Ray Hayes Secre tary LSF After reading October column couldnt resist sending attached article Ray sent copy Dan Pruss Soaring column February 1980 issue Model AviationBE putting SMT contest today Id use --maicnea rerormance system TOP PERFORMANCE K&B tNGINES AirplaneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POXY RtSIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS January 1990 157 NATIONAL CHAMPION ** THE PIXY HAS DONE IT AGAIN IT WON THE US NATIONALS IN 1989 JUST AS IT DID IN 1985 ESTABLISHING THE PIXY AS THE TOP 2-METER COMPETITION GLIDER TODAY DAVE BANKS IS THE WINNING PILOT FOUR OTHER PIXYS TROPHIEDI 4 MATS WINNERS DAVE BANKS PIXY * laad*lrnpoloeawswoatdsg * * U-AammI Newelettor SECOND WID Ia Now Available SI par year * 21230 Damson Road Bothell WA 98021 206-778-8067 Put Fun Back Fun Fly Get ROUN TUIT Today Its round sflat flies 30 Flying DISC STOL SUPERIOR Small Field FLY Aircraft STABLE PREDICTABLE EtAGILE $43plus *4 shipping TX Res add 7% sales tax VISA Foam ft Lite Ply Construction ELE VON Mixer Included 25- 4B cid 3-3Slbs Accurate QUALITY Materials Wing span 64 semi-symmetrical Wing area 736 sq Length 45 Weight 41/2 5 lbs Engine 35 40 TS 4 channel radio reauired SCEPTER Fast Highly Aerobatic Sport Plane Wing span 60 semi-symmetrical Wing area 540 sq Length 42 1/2u Weight 5-5 /2 lbs Engine 45-60 TS 4 channel radio required Certified Checks money orders Michigan Residents add 4% sales tax Personal checks Allow 2 weeks clear COD add $300 ign Add $1500 MODELS INC 285 FIRST ST PO BOX 130 FREELAND MI 48623 517 695-5385 Man turer Hi Performaftbtati andraft CULPEPPEE C MODELS INC 2526 Washington DubuqueIA 52001 3191583-4530 SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dealer/Diatrlbutor Inquirm. Invited Pier di Re dents Add 6% Sales Tan original format described Dan single change very efficient contes tants enjoyed emphasis Distance best part about current interest SMT taking positive step using organizersupplied winches rather trying change current F3B rules Proving theres nothing new under sun 1979 Ray Fort Wayne LOFT gang put sizeable F3B-type contest incorporated ideas talking about now Ray didnt have restrictions planes must remembered still early years RC Soaring An interesting sidelight about contest famous Airtronics Sagitta introduced Lee Renaud given prototype Sagitta kits nine top pilots condition fly LOFT contest nine Dwight Holley went win World Championship 1981 Gobbler 1979 Sagitta considered pretty hot F3B ship Remember 1977 Skip Miller won first Soaring World Championships Airtronics Aquila Today fully sheeted straight wings addition ailerons Sa gitta would make fine SMT plane highlights Ray ran contest e round consisted Speed Distance task Duration Distance task putting emphasis Distance Three organizer-supplied winches used No working times used e No man-on-man scoring used flight scored against best flight task Speed flown rotation time Distance flown two time using four-minute flight time Dura tion flown three time using F3B Six-Minute Precision So Ray said format would still good way hold SMT contest Manpower flagger requirements Distance reduced because two planes flown time next news quickly grabbed attention SOAR club Chicago newsletter ed ited Tom Kallevang August Jim McCar thy held SOAR Sportsman F3B contest novel twists Speed run minimum cap 30 seeFIBERGLASS PARTS Carry over 300 cowls 70 wheel pants made epoxy glass lightweight brittle zero pnholes Send SASE $100 latest cataloa onds did exactly 30 seconds got 1000 points did under 30 seconds still got 1000 points Times over 30 seconds normalized 30-second cap lowest time happened over 30 seconds didnt happen contest e Distance run three set target levels six eight 10 laps per round first round target six laps made six laps scored 1000 points target next round eight laps didnt get six laps target stayed six laps etc Duration per F3B rules working time flown man-on-man love see kind stuff shows guys putting ol gray matter work inking up new original ways run Speed Distance tasks Ive heard max imum caps speed task like 35 40 sec onds admit never thought mini mum cap idea Also increasing target laps Distance very imaginative ideas good because keep Sportsman pilots thick contest Lets hear about club running SMT contests Understanding Ni-Cds following article Brian Chan appeared South Bay SS newslet ter under heading Low-Tech Stuff Everything wanted know about Ni-Cds afraid ask John Dvorak edits excel lent Silent Flyer newsletter has tradition printing informative original articles think timely review Ni-Cd batter ies because us colder climes can use slack time make sure packs top shape Brian known Dr Chan friends because skill stitching up sick ships Most RC modelers use Ni-Cd batteries radios yet few seem understand well rest equipment article about workings Ni-Cds digging too deeply technical explanations goal help prevent premature battery failure keep explanations simple well discuss 500-600 milliamp-hour cells come RC systems Fast-charging RC car Elec tric flight power packs require different treatment 158 Model Aviation ! DOUBLE VISION! THE iWO IN ONE TRAINER STABLE HIGH WING PLANE AND AEROBATIC LOW WING ALL IN THE SAME KIT CI areor scralcfl Oulloer SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set todayl See Dealer Cataloger Order lIf dont carry Sgaare tst Tasla call pay far call well pay far shipping us sad Canadal C 00 Eatra r & D FIBERGLASS SPECIAL 38624 Mt Kisco Sterling Hgts MI 48310 Call Us 313 978-2512 *New Owners * Steve & Km Durecki z PRACTICAL SIZED GIANT SCALE MODEL PLANS F bergiass Cowlings Canapes Ava ab e F-i5 Span 77 DC-31 1/2 1140Span$4200 F4U CORSAIR2 1/4 193Span$3000 A6M5 ZERO2 1/2 191Span$3000 Plans RK-20 CURTIS P402 1/2 194Span$3000 K-740 Ducted Fans AT-6 TEXAN24 1101Span$3000 ntom 35 Span SIO00 F8F BEARCAT2 112 186Span$3000 gen 32 Span $1000 FOKKER DR-i27 163Tripe$2700 5 36 Span $1000 ___________________________________________Catalog Plans Accessories Supplies n Canopy $1500 Order FromCredited First Order $25 More_______________________ Nick Ziroli29 Edgar Dr Smithiown NY 11787 USA516-234-5038 1 long should batteries charge lot Room temperature efficient remains state discharge damage can normal 50-60 milliamp chargers charging charging temperature although 50 -90 F quite caused cell reversal should 14-16 hours no matter little bat- acceptable Charging extreme temperature can 8 What about accidental reverse charging tery has used previous discharge cause damage Discharge rates reason- inadvertent complete discharging Complete ensures cells fully charged able 0 120F efficient dis- discharging under load will probably cause time entails no risk damage due charge temperature about 90 freezing cells reverse polarity will reverse overcharge able hand point Ni-Cds lose about 10-15% capac- charging low rates may cause perma end period charge few hours ity nent damage Charge battery 24 hours dis longer rather stoping early 100-hour over- 5 much discharge time can expect charge through controlled discharger battery charge C/10 rateC being amp-hour freshly charged batteries Most transmitters cycler recharge 15 hours again dis rating will cause damage battery use about 150 milliamps gives about three charge through discharger Time final dis has left completely discharge 24-hour hours switched-on time although new com- charge ascertain damage has caused charge advisable time charge puter transmitters might have higher current have occasion accidentally left night before want use model Ni-Cds draw Flight pack durations vary enormously ac- transmitter on occasion batslowly lose charge its best charge un- cording use receiver itself draws 10 tery fully recovered til intend fly to 20 milliamps servo motors draw con- 9 deal memory after re 2 long batteries keep charge siderably series experiments pro- peated partial discharging soand should top off charge model duced following results should called memory effect does happen prac stored winter Sintered cylindrical cells treated very general guide tice Yes surprised too learned pencells will self-discharge room tempera- Two-channel Thermal Sailplane intermit- manufacturers say unable pro ture about 20% per month completely dis- tent stick usel00 mA average current draw duce effect except carefully controlled lab charged four five months prob- five-hour expected battery time tests conclude must effect ob lem can stored state charge al- Four-channel Thermal Sailplane served before battery-manufacturing technology indefinitely significant loss life servo continuously used three servos intermittent reached todays standards Topping-off unnecessaryperhaps waste- use150-200 mA average current draw 25- 10 What does mean crystals form ful Just charge completely discharged packs 3-hour expected battery time cells usually quite harmless 24 hours before use F3B-type Sailplane six servos continu- caused minute porosity sealing ring 3 Should fast charging trickle charging ous use270-330 mA average current draw 1 s- Electrolyte reacts carbon dioxide air used No Stick standard C/l0 rate 50 2-hour expected battery time forms crystals potassium carbonate Wipe 60 milliamp charge Trickle charging may re- 6 What life expectancy battery crystals off dry cloth smear little duce useful capacity cells particularly Most Ni-Cds will last 800 000 complete cy- silicone grease prevent further growth used continuously Fast charging well des cells partially discharged Crystals may also form around safety risking reduction battery life capacity cycle life expectancy substantially in- vent cells have abused gross overwhen properly controlled inefficient Man- creased After periods mentioned cells charge overdischarge causing valve ufacturers usually recommend charging useless capacities reduced open lose little electrolyte com 70% 80% capacity must fast charge 7 Does stalled servo ruin battery monly called venting situation usually properly carefullystudy manufac- stalled servo draws about 400 mA there- doesnt happen unless cells have fast turers instructions fore discharging battery very quickly charged accidentally short-circuited Should 4 What effect does temperature have Quite itself does cause damage battery suspect has happened check loss OUT OF THE ASHES .. THE WINNERS CIRCLE PHOENIX SPAN 132 AREA 1047 SQ IN WEIGHT 7276 OZ AJFlFOIL 84061 WiNGLOAD 10 OZISQ FT ASPECT RATIO 1671 ______________________ COMPETITION PRODUCTS -1-921 BIRDIE WAY APOLLO BEACH FL 33872 ____________FOR ADDONAL INFORMAllON SEND LBASE813 845 5171 January 1990159 td Co aiIn*t nmn~ Only certihed checks money orders accepted Minimum order S 1200 ihme packages old Pomerpoles $350 per package tisO shipping handling CT residents add 75% sales las Prices sobiect chasge notice DEALER IF4OUtAIES INVITED tother intormalion dealer onces send SASE Rosiness Card SERMOS RIC SNAP CONNECTORSInc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 Smal stanwed aett-sddrcind cowiope tar pncusa individual cfsnisicns Add 5300 fir COD Parrish Aircraft & Scale Models 1125 SW 4*bTefhntstloe1 333tT 305 581 4477 SAVE YOUR FIELD SNUF-LER muffler Ia low cost easy install lightweight sound reducing muffler no performance penalty answer AMA muffler rule suggestions saving flying fields Meets AMA muffler rule suggestions SNUF-FLERTM 3 10 decibels quieter stock muffler MUFFLER No power loss wIth possible 300-500 RPM increase patented Improves engine idle s better fuel economy Easily attached 25-108 stock mufflers Heat corrosion resistant Black E coat finish No special adapters required Weighs 35 025 Fits ASP BRAT ENYA FOX HP IRVINE K & B 05 MAX ROYAL VS SUPER TIGRE mufflers II available hobby shop ORDER DIRECT immediate shipment Check MO Visa MC. CODSEND 2Sf STAMP accepted Add$250 tsr UPS $200 COD and6% salestasFOR ADDITIONAL INFO Lfor Cald reodentAND JTEC CATALOG capacity discharger 11 aviv need cycle battery Yes Repeated charge discharge cycles low current levels such experience RC tend form active materials cells large crystals thus lessening active surface area Although does affect capacity battery does tend reduce discharge voltage can adversely affect operation equipment course time Perform ning few controlled cycles higher charge discharge rate reduces crystals effectively re vitalizing battery Discharging 11 volts per cell considered full discharge battery cycler available few dis charges through controlled discharger de scribed below time followed 24-hour charge radios 50 mA charger pro vide acceptable quite efficient alter native cycling should performed once twice year depending much use equipment 12 What happens cell goes down cases unless battery has severely mistreated will have caused inadequate charging ie trying recharge amount battery has dis charged Because charging about 70% ef ficient takes 14 15 hours put back 500 mA safer regard cells being fully discharged time used individual cells battery slightly different capacities weakest cell ie. lowest fully recharged time will start lag behind others capac ity Eventually lag will cause cell dis charge completely partway through discharge cycle entire battery pack results will obviously disastrous happens flight Normally condition one-cell discharge will cause cell reverse its polarity thus lowering batterys voltage over two volts unless left state long period se vere permanent damage should result partic ularly pencells Recharge check bat tery described above remember fully charge time future 13 can check capacity bat tery cvcler Build controlled dis charger can made quite simply requir ing few resistors spare charger plugs voltmeter stopwatch circuit de scribed below discharges about 230-240 milli amps uses cheap resistors can built about hour operate instructions receiver transmitter instructions brackets [I After charging battery least 15 hours connect voltmeter points B [A C] discharger connect dis Rx Jack resistors 820 5% Unit de signed discharge ONE pack time Av erage current drain about 240 mA charger plug appropriate battery volt meter should read 5-6 volts [10-12 volts] will drop about 475 [95] volts over next 90 minutes As endpoint reached will drop about 45 [901 volts over 10minute period drop 44 [88] volts over five minutes final useful voltage Disconnect battery make note total time discharge Around 120 minutes indicates good battery Much less indicates low capacity low capacity suspected recharge battery 15 hours repeat discharge During discharge check voltage 10 minutes until voltage drop begins ac celerate watch closely making sure disconnect 44 [88] volts Keep record discharge times comparison future checks possible equip yourself battery cycler like Ace RIC Inc Digipace BB cycler much preferred over manual discharger because does everything described above automatically recharges both packs discharge cycle completed cost crashed model much price cycler RC Pylon Racing/Hager Continued page 55 RPM Header only16000-16100 pipe 15200 Comments Picco Q500 engine uses upper-end parts piston cylinder liner conrod wrist pin same catalog numbers shown rear-intake marine/FAI/Formula version liner has approximately 1800 ex haust duration puts piped sleeve category above results show Rossi gets very little boost pipe Picco gets plenty Rumor has Webra engines also run much better pipe havent tested yet Anybody got theyd like loan testing other hand stock Picco pipe ap pears long enough help en gine actually detune hold back Somewhere between stock MACS pipe length stock Picco pipe length predict 160 Model Aviation plane desogned meet QSPRA Fonnula 120 nales 1/4 scalemodel accepts 60120 ci engines Features Epoxy glass fuselage foam wing contnaction Dursi landing gear scale landing gear add $1500 erharK wS MINI-JET SERIES planes feature balsa constmction Designed intermediate flyer mind will accept 25 32 size engine uses rear exhaust engine exceptional perfomance Get thrill jet hassles ducted fan $5 AACI Win5 Spain Laigmud -0 nisjn ins osity fly Wim sina 720 sq si Bns 454 cycle ir40 2 cycle also amitable fcx tarp electric mum Plans Cowling andAmg Ribs also sold Full kit $8500 Please add $400 shipping turn printer mote airfoil plotter FOILED AGAIN! OT AIRFOILS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 ZZ o,,ooJOMdofrf US$50 Rqo OMPC 7AT,p,rbie-C, opo0O po0 pro 0lS5ro~7 dop pwlI 525 354okUIUm S,fr ko,.oyod,w CYGNET Software 24843 Del Prado #141b Dana Point CA 92629
Edition: Model Aviation - 1990/01
Page Numbers: 52, 53, 157, 158, 159, 160
ORBITER name Hand-Launch Glider kit Dodgson Designs quite de parture Boh Dodgson two reasons First designed Bob Erie Jackson Portland second its built-up wood con struction instead Bobs normal fiberglass-andfoam technology H-L Gliders gaining more adher ents because theyre great way getting few flights during lunch Also can learn thermal planes up 15 ft thermal ing 150 ft seems like piece cake Eric flew Orbiter Nats H-L event finished fifth behind some pretty heavy competi tion likes Wurts Martin Jolly Har ris ship has 59-in span 432 sq area Selig 4061 airfoil weighs 17 18 oz miniradio three servos Whats unusu al Hand-Launcher features ailerons roll control flaps optional report Bobs Second Wind bian nual newsletter After flying season flapped version Orbiter Eric has some sights using flaps really light lift cant quite climb out marginal thermal Eric cracks little positive flap about %2 root trailing edge allows him turn tighter fly slower climb faster positive flap elevator compensation also gives him effect slight Up elevator maxes Nats Eric reflexed flaps thermaled plane inverted about half max Eric says hasnt found reflexing TE increases launch height usually launches neutral flap really light air sometimes launches %2 positive flap going back neutral just before tops out Orbiter kit $65 plus shipping Its best send two stamps Bob complete catalog mailing info Second Wind newsletter published twice year $1 per copy cash OK contains tidbits interest espe cially Dodgson Designs kit fansof number steadily growing Thermal contest fliers have found Bobs Lovesong tough ship beat address 21230 Damson Road Bo thell WA 98021 modeler steps up October 1989 col umn pumped Oly II pilots consider mov ing up Sagitta gitta fliers advanc ing aileron ships Going more ca pable planes think biggest kicks can experience fantastic hobby column used analogy full-size Soar mg ie transition trainers up 15Meter Unlimited racing ships pitch prompted Bill Anderson Laguna Niguel CA write Ive never written before enjoy col umn MA very much Ive Sailplanes 25 years have fun enjoy ment still reason letter column about full-size Sailplanes think must have gotten Schweizers mixed up Although some 2-22s around its 233 main trainer new glider pilots 1-35 built Standard Class com petition ship intermediate type happen know little about Schweizers because own SGS l-26E serial number 518 Al though Ive full-size soaring year know 1-35 ship can jump trainer 1-26 considered intermediate 1-35 might interested know rea son got full-size soaring because ing some research Scale RC project Steve Moskals 1-26 construction article February 1988 issue Model Avia tion took ride signed up lessons soloed about 15 hours began looking own 1-26E located purchased good Mo desto CA 1-26 Well its favorite ships long time Steves construction article appeared MA just start building seeing full-size ship knew would just matter time until got flew Its great ship Quick responsive thermals best joy fly thrill minute model flies just like big fly off slope Harley Michaclis newest designs span spectrum technology Experimental Roto 1 L uses pivoting wings roll longitudinal el evator control Wing also has camber-changing flaps Stabilizer fixed position Hed like other modelers try scheme infor mation column Easy Eagle R Two-Meter trainer kitted Ace RIC Inc Control surface hinging via Harleys rubber hinges Dodgson Designs newest kit Eric Jackson-designed Orbiter Hand-Launch Sailplane Flat wing tells uses aileronsunusual ship size Flaps optional Eric R did very well 89 Nats Kit sells $65 plus shipping Its wood built up 52 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 agree about progressing models higher performance Its lot fun challenging Im enclosing two pics model other full-size 1-26 kind letter love get nec essarily bits pointing out slips because Bills experience shows closely modeling full-size soaring can come together Its either/or situation Id bet model Sailplane fliers all-around aviation nuts would jump chance try full-size too could would interesting hear fliers both Harley Michaelis retired insurance agent Walla Walla WAbut should have aero engineer because hes mechanical ge nius Harleys Roto experimental ship designed test wing system incorporates twist wings roll pitch control plus flaps Think about minute wings rotate opposite directions aileron roll action ro tate together elevator pitch control top full-span flaps can used camber-changing time Harley showed Roto 1 Richland Fun-Fly Roll pitch work off two servos transmitter elevon mixing capability third servo all-mechanical flap system dont ask explain worksall know does Harley flight testing Roto 1 would like few experienced Sailplane fliers join forces him continuing development program would involve building test flying Roto experimental planes reporting results back Harley Obviously program isnt faint heart Only first-class scratchbuilders lots time skill need apply Harley has made up information packet contains discussion sheets drawings vari ous linkages scale drawings Roto etc readers interested receiving packet Harley would like send him $3 cover postage copying costs self-addressed 9 x 12-in envelope address 26 South Roose velt Walla Walla WA 99362 Harley also sent better picture Easy Ea gle trainer described September col umn very practical-looking Two-Meter kit features flaps new Selig 7032 air foil Harley course uses rubber Harleys Hinges Easy Eagle work great Both kit hinges manufactured Ace R/C Inc available local hobby shop Soaring handicaps Most people familiar Continued page 157 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Attractive case included ...~Wraparound frame fits comfortably over mast prescription glasses Blocks harmful ultraviolet radiation Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available in Clear shop work 81325 Amber overcast days & late afternoons S1495 Gray S1495 & Mirror Si 995 sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved bim serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer ____________Pikes Peak RC Club Prices include shipping handling E9Jpiii See hobby dealer first inininin doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 SCALE RADIO CONTROL 0 VINTAGE sizes2hz 3/431/i 133/4 11443/i 1A5 1/61/a WHE CONTROL-UNE SMOOTH CONTOUR 3/4234 1314 114334 11/24/z 214514 VISA/MC ELS FREE-FUGHT 00 GOLDEN AGE sizes214 31/a 1334 11443/a 11/25 17/a6/z NEW BALLOON 2hz4hz 314514 3 34 January 1990 53 Bill Anderson wanted some Scale re search -scale Schweizer 1-26B model building AboveMA Febru ary 88Plan No 578 went air port got ride full-scale Sailplane loved much went get pilots license bought used 1-26E Below SUCKER-KIT55995 tiVHS Show & Tell Video $3995 Add $400 shipping & handling MI residents add 40/0 sales tax 0 C c 5Send 3100 SASE Icr producl lid samples real weed veneer skins Product List Includes Gapless Arrow Shall Hinges carbon Tow Mylar Sheet E -Tech items er Inquires Welcome C SEND CHECK OR MONEY RDER TO J'5 -sPO Box 866 0 Lapeer Ml 48446 313 664-3330 imposits Aircraft Eng & SupplyFAX 664-9780 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog theac other kite accessories ~ ~DEPT MA PAWNEE ST SAN MARCOS CA 9 words optically coupled speed controls must designed way scratch Sorry Please re fer December 1989 column discus sion about installing RF chokes Other reader reaction has taken two sides writing no problems nonoptically coupled controls noth ing problems guess someone has installation noise-free despite hardwired optically coupled speed control its very hard understand optical isolation would ever needed contrary fashion motor noise problems quite aware unpleasant sometimes downright nasty situation can Remember different power systems speed controls radios can act react completely differently fact Ive seen two receivers same manufacture type function differently respect motor noise So fortunate have no such problems please dont conclude gen eral no such problems did youd dead wrongand could happen very next system since should reading some what just prior holidays please accept sincere wishes very happy holiday season great Electric New Year RC Soaring/Blakeslee Continued page 53 handicapping systems used bowling golf hadnt heard being used Soaring until read about Diablo Valley Soar ing Societys new system club contests fine newsletter Thermal Tales Co-editor Pete Thompson explains works executive committee decided needed some way fledglings less experienced fliers feel less intimidated better per forming pilots whole idea course encourage participation have fun club contests Accordingly club has adopted handicap system club contests lieu class system have employed date Objectives 1 Permit members varying skill lev els variable performance capabilities com pete together relatively equal chance winning 2 Provide vehicle assigning members teams desired 3 system should responsive individuals current performance System 1 Normalized score actual raw score di vided perfect score times 1000 2 Fliers average mean last four normalized scores 3 Handicap computed 70% differ ence between fliers average 950 4 Handicap added pilots normalized score determine final score 5 Annual championship determined adding nine best final scores during year Other miscellaneous facets DNF did finish day will included fourmonth rolling average although would part season total Popoffs should allowed everyone handicap over some number like 100 150 Fledglings may turn trans mitters over experienced fliers get out trouble long returned pi lots safe control recovered Handicaps calculated first Diablo Val ley contest under new format ranged low 6 Bob McGowan up high 257 As turned out Bob off day raw score 748 So final score 754 other hand Don Anthony hot day scoring 954 scratch would have won him contest handicaps adding 168 handicap gave him final score 1122 points big winning margin Pete says go ing evaluate system worked 89 maybe reset some parameters 1990 Any other clubs want give try Sportsman Multi-Task news Feedback just starting come SMT activities As probably know 1990 will SMT develop mental year encouraging clubs add some type Distance Speed task traditional Thermal Duration contests lots ways Speed Distance tasks can run below make things equal less intimidating Sportsman fliers SMT Committee recommends 75-oz limit planes Id like print couple recently received items just give flavor whats happen ing first letter Ray Hayes Secre tary LSF After reading October column couldnt resist sending attached article Ray sent copy Dan Pruss Soaring column February 1980 issue Model AviationBE putting SMT contest today Id use --maicnea rerormance system TOP PERFORMANCE K&B tNGINES AirplaneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POXY RtSIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS January 1990 157 NATIONAL CHAMPION ** THE PIXY HAS DONE IT AGAIN IT WON THE US NATIONALS IN 1989 JUST AS IT DID IN 1985 ESTABLISHING THE PIXY AS THE TOP 2-METER COMPETITION GLIDER TODAY DAVE BANKS IS THE WINNING PILOT FOUR OTHER PIXYS TROPHIEDI 4 MATS WINNERS DAVE BANKS PIXY * laad*lrnpoloeawswoatdsg * * U-AammI Newelettor SECOND WID Ia Now Available SI par year * 21230 Damson Road Bothell WA 98021 206-778-8067 Put Fun Back Fun Fly Get ROUN TUIT Today Its round sflat flies 30 Flying DISC STOL SUPERIOR Small Field FLY Aircraft STABLE PREDICTABLE EtAGILE $43plus *4 shipping TX Res add 7% sales tax VISA Foam ft Lite Ply Construction ELE VON Mixer Included 25- 4B cid 3-3Slbs Accurate QUALITY Materials Wing span 64 semi-symmetrical Wing area 736 sq Length 45 Weight 41/2 5 lbs Engine 35 40 TS 4 channel radio reauired SCEPTER Fast Highly Aerobatic Sport Plane Wing span 60 semi-symmetrical Wing area 540 sq Length 42 1/2u Weight 5-5 /2 lbs Engine 45-60 TS 4 channel radio required Certified Checks money orders Michigan Residents add 4% sales tax Personal checks Allow 2 weeks clear COD add $300 ign Add $1500 MODELS INC 285 FIRST ST PO BOX 130 FREELAND MI 48623 517 695-5385 Man turer Hi Performaftbtati andraft CULPEPPEE C MODELS INC 2526 Washington DubuqueIA 52001 3191583-4530 SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dealer/Diatrlbutor Inquirm. Invited Pier di Re dents Add 6% Sales Tan original format described Dan single change very efficient contes tants enjoyed emphasis Distance best part about current interest SMT taking positive step using organizersupplied winches rather trying change current F3B rules Proving theres nothing new under sun 1979 Ray Fort Wayne LOFT gang put sizeable F3B-type contest incorporated ideas talking about now Ray didnt have restrictions planes must remembered still early years RC Soaring An interesting sidelight about contest famous Airtronics Sagitta introduced Lee Renaud given prototype Sagitta kits nine top pilots condition fly LOFT contest nine Dwight Holley went win World Championship 1981 Gobbler 1979 Sagitta considered pretty hot F3B ship Remember 1977 Skip Miller won first Soaring World Championships Airtronics Aquila Today fully sheeted straight wings addition ailerons Sa gitta would make fine SMT plane highlights Ray ran contest e round consisted Speed Distance task Duration Distance task putting emphasis Distance Three organizer-supplied winches used No working times used e No man-on-man scoring used flight scored against best flight task Speed flown rotation time Distance flown two time using four-minute flight time Dura tion flown three time using F3B Six-Minute Precision So Ray said format would still good way hold SMT contest Manpower flagger requirements Distance reduced because two planes flown time next news quickly grabbed attention SOAR club Chicago newsletter ed ited Tom Kallevang August Jim McCar thy held SOAR Sportsman F3B contest novel twists Speed run minimum cap 30 seeFIBERGLASS PARTS Carry over 300 cowls 70 wheel pants made epoxy glass lightweight brittle zero pnholes Send SASE $100 latest cataloa onds did exactly 30 seconds got 1000 points did under 30 seconds still got 1000 points Times over 30 seconds normalized 30-second cap lowest time happened over 30 seconds didnt happen contest e Distance run three set target levels six eight 10 laps per round first round target six laps made six laps scored 1000 points target next round eight laps didnt get six laps target stayed six laps etc Duration per F3B rules working time flown man-on-man love see kind stuff shows guys putting ol gray matter work inking up new original ways run Speed Distance tasks Ive heard max imum caps speed task like 35 40 sec onds admit never thought mini mum cap idea Also increasing target laps Distance very imaginative ideas good because keep Sportsman pilots thick contest Lets hear about club running SMT contests Understanding Ni-Cds following article Brian Chan appeared South Bay SS newslet ter under heading Low-Tech Stuff Everything wanted know about Ni-Cds afraid ask John Dvorak edits excel lent Silent Flyer newsletter has tradition printing informative original articles think timely review Ni-Cd batter ies because us colder climes can use slack time make sure packs top shape Brian known Dr Chan friends because skill stitching up sick ships Most RC modelers use Ni-Cd batteries radios yet few seem understand well rest equipment article about workings Ni-Cds digging too deeply technical explanations goal help prevent premature battery failure keep explanations simple well discuss 500-600 milliamp-hour cells come RC systems Fast-charging RC car Elec tric flight power packs require different treatment 158 Model Aviation ! 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THE iWO IN ONE TRAINER STABLE HIGH WING PLANE AND AEROBATIC LOW WING ALL IN THE SAME KIT CI areor scralcfl Oulloer SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set todayl See Dealer Cataloger Order lIf dont carry Sgaare tst Tasla call pay far call well pay far shipping us sad Canadal C 00 Eatra r & D FIBERGLASS SPECIAL 38624 Mt Kisco Sterling Hgts MI 48310 Call Us 313 978-2512 *New Owners * Steve & Km Durecki z PRACTICAL SIZED GIANT SCALE MODEL PLANS F bergiass Cowlings Canapes Ava ab e F-i5 Span 77 DC-31 1/2 1140Span$4200 F4U CORSAIR2 1/4 193Span$3000 A6M5 ZERO2 1/2 191Span$3000 Plans RK-20 CURTIS P402 1/2 194Span$3000 K-740 Ducted Fans AT-6 TEXAN24 1101Span$3000 ntom 35 Span SIO00 F8F BEARCAT2 112 186Span$3000 gen 32 Span $1000 FOKKER DR-i27 163Tripe$2700 5 36 Span $1000 ___________________________________________Catalog Plans Accessories Supplies n Canopy $1500 Order FromCredited First Order $25 More_______________________ Nick Ziroli29 Edgar Dr Smithiown NY 11787 USA516-234-5038 1 long should batteries charge lot Room temperature efficient remains state discharge damage can normal 50-60 milliamp chargers charging charging temperature although 50 -90 F quite caused cell reversal should 14-16 hours no matter little bat- acceptable Charging extreme temperature can 8 What about accidental reverse charging tery has used previous discharge cause damage Discharge rates reason- inadvertent complete discharging Complete ensures cells fully charged able 0 120F efficient dis- discharging under load will probably cause time entails no risk damage due charge temperature about 90 freezing cells reverse polarity will reverse overcharge able hand point Ni-Cds lose about 10-15% capac- charging low rates may cause perma end period charge few hours ity nent damage Charge battery 24 hours dis longer rather stoping early 100-hour over- 5 much discharge time can expect charge through controlled discharger battery charge C/10 rateC being amp-hour freshly charged batteries Most transmitters cycler recharge 15 hours again dis rating will cause damage battery use about 150 milliamps gives about three charge through discharger Time final dis has left completely discharge 24-hour hours switched-on time although new com- charge ascertain damage has caused charge advisable time charge puter transmitters might have higher current have occasion accidentally left night before want use model Ni-Cds draw Flight pack durations vary enormously ac- transmitter on occasion batslowly lose charge its best charge un- cording use receiver itself draws 10 tery fully recovered til intend fly to 20 milliamps servo motors draw con- 9 deal memory after re 2 long batteries keep charge siderably series experiments pro- peated partial discharging soand should top off charge model duced following results should called memory effect does happen prac stored winter Sintered cylindrical cells treated very general guide tice Yes surprised too learned pencells will self-discharge room tempera- Two-channel Thermal Sailplane intermit- manufacturers say unable pro ture about 20% per month completely dis- tent stick usel00 mA average current draw duce effect except carefully controlled lab charged four five months prob- five-hour expected battery time tests conclude must effect ob lem can stored state charge al- Four-channel Thermal Sailplane served before battery-manufacturing technology indefinitely significant loss life servo continuously used three servos intermittent reached todays standards Topping-off unnecessaryperhaps waste- use150-200 mA average current draw 25- 10 What does mean crystals form ful Just charge completely discharged packs 3-hour expected battery time cells usually quite harmless 24 hours before use F3B-type Sailplane six servos continu- caused minute porosity sealing ring 3 Should fast charging trickle charging ous use270-330 mA average current draw 1 s- Electrolyte reacts carbon dioxide air used No Stick standard C/l0 rate 50 2-hour expected battery time forms crystals potassium carbonate Wipe 60 milliamp charge Trickle charging may re- 6 What life expectancy battery crystals off dry cloth smear little duce useful capacity cells particularly Most Ni-Cds will last 800 000 complete cy- silicone grease prevent further growth used continuously Fast charging well des cells partially discharged Crystals may also form around safety risking reduction battery life capacity cycle life expectancy substantially in- vent cells have abused gross overwhen properly controlled inefficient Man- creased After periods mentioned cells charge overdischarge causing valve ufacturers usually recommend charging useless capacities reduced open lose little electrolyte com 70% 80% capacity must fast charge 7 Does stalled servo ruin battery monly called venting situation usually properly carefullystudy manufac- stalled servo draws about 400 mA there- doesnt happen unless cells have fast turers instructions fore discharging battery very quickly charged accidentally short-circuited Should 4 What effect does temperature have Quite itself does cause damage battery suspect has happened check loss OUT OF THE ASHES .. THE WINNERS CIRCLE PHOENIX SPAN 132 AREA 1047 SQ IN WEIGHT 7276 OZ AJFlFOIL 84061 WiNGLOAD 10 OZISQ FT ASPECT RATIO 1671 ______________________ COMPETITION PRODUCTS -1-921 BIRDIE WAY APOLLO BEACH FL 33872 ____________FOR ADDONAL INFORMAllON SEND LBASE813 845 5171 January 1990159 td Co aiIn*t nmn~ Only certihed checks money orders accepted Minimum order S 1200 ihme packages old Pomerpoles $350 per package tisO shipping handling CT residents add 75% sales las Prices sobiect chasge notice DEALER IF4OUtAIES INVITED tother intormalion dealer onces send SASE Rosiness Card SERMOS RIC SNAP CONNECTORSInc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 Smal stanwed aett-sddrcind cowiope tar pncusa individual cfsnisicns Add 5300 fir COD Parrish Aircraft & Scale Models 1125 SW 4*bTefhntstloe1 333tT 305 581 4477 SAVE YOUR FIELD SNUF-LER muffler Ia low cost easy install lightweight sound reducing muffler no performance penalty answer AMA muffler rule suggestions saving flying fields Meets AMA muffler rule suggestions SNUF-FLERTM 3 10 decibels quieter stock muffler MUFFLER No power loss wIth possible 300-500 RPM increase patented Improves engine idle s better fuel economy Easily attached 25-108 stock mufflers Heat corrosion resistant Black E coat finish No special adapters required Weighs 35 025 Fits ASP BRAT ENYA FOX HP IRVINE K & B 05 MAX ROYAL VS SUPER TIGRE mufflers II available hobby shop ORDER DIRECT immediate shipment Check MO Visa MC. CODSEND 2Sf STAMP accepted Add$250 tsr UPS $200 COD and6% salestasFOR ADDITIONAL INFO Lfor Cald reodentAND JTEC CATALOG capacity discharger 11 aviv need cycle battery Yes Repeated charge discharge cycles low current levels such experience RC tend form active materials cells large crystals thus lessening active surface area Although does affect capacity battery does tend reduce discharge voltage can adversely affect operation equipment course time Perform ning few controlled cycles higher charge discharge rate reduces crystals effectively re vitalizing battery Discharging 11 volts per cell considered full discharge battery cycler available few dis charges through controlled discharger de scribed below time followed 24-hour charge radios 50 mA charger pro vide acceptable quite efficient alter native cycling should performed once twice year depending much use equipment 12 What happens cell goes down cases unless battery has severely mistreated will have caused inadequate charging ie trying recharge amount battery has dis charged Because charging about 70% ef ficient takes 14 15 hours put back 500 mA safer regard cells being fully discharged time used individual cells battery slightly different capacities weakest cell ie. lowest fully recharged time will start lag behind others capac ity Eventually lag will cause cell dis charge completely partway through discharge cycle entire battery pack results will obviously disastrous happens flight Normally condition one-cell discharge will cause cell reverse its polarity thus lowering batterys voltage over two volts unless left state long period se vere permanent damage should result partic ularly pencells Recharge check bat tery described above remember fully charge time future 13 can check capacity bat tery cvcler Build controlled dis charger can made quite simply requir ing few resistors spare charger plugs voltmeter stopwatch circuit de scribed below discharges about 230-240 milli amps uses cheap resistors can built about hour operate instructions receiver transmitter instructions brackets [I After charging battery least 15 hours connect voltmeter points B [A C] discharger connect dis Rx Jack resistors 820 5% Unit de signed discharge ONE pack time Av erage current drain about 240 mA charger plug appropriate battery volt meter should read 5-6 volts [10-12 volts] will drop about 475 [95] volts over next 90 minutes As endpoint reached will drop about 45 [901 volts over 10minute period drop 44 [88] volts over five minutes final useful voltage Disconnect battery make note total time discharge Around 120 minutes indicates good battery Much less indicates low capacity low capacity suspected recharge battery 15 hours repeat discharge During discharge check voltage 10 minutes until voltage drop begins ac celerate watch closely making sure disconnect 44 [88] volts Keep record discharge times comparison future checks possible equip yourself battery cycler like Ace RIC Inc Digipace BB cycler much preferred over manual discharger because does everything described above automatically recharges both packs discharge cycle completed cost crashed model much price cycler RC Pylon Racing/Hager Continued page 55 RPM Header only16000-16100 pipe 15200 Comments Picco Q500 engine uses upper-end parts piston cylinder liner conrod wrist pin same catalog numbers shown rear-intake marine/FAI/Formula version liner has approximately 1800 ex haust duration puts piped sleeve category above results show Rossi gets very little boost pipe Picco gets plenty Rumor has Webra engines also run much better pipe havent tested yet Anybody got theyd like loan testing other hand stock Picco pipe ap pears long enough help en gine actually detune hold back Somewhere between stock MACS pipe length stock Picco pipe length predict 160 Model Aviation plane desogned meet QSPRA Fonnula 120 nales 1/4 scalemodel accepts 60120 ci engines Features Epoxy glass fuselage foam wing contnaction Dursi landing gear scale landing gear add $1500 erharK wS MINI-JET SERIES planes feature balsa constmction Designed intermediate flyer mind will accept 25 32 size engine uses rear exhaust engine exceptional perfomance Get thrill jet hassles ducted fan $5 AACI Win5 Spain Laigmud -0 nisjn ins osity fly Wim sina 720 sq si Bns 454 cycle ir40 2 cycle also amitable fcx tarp electric mum Plans Cowling andAmg Ribs also sold Full kit $8500 Please add $400 shipping turn printer mote airfoil plotter FOILED AGAIN! OT AIRFOILS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 ZZ o,,ooJOMdofrf US$50 Rqo OMPC 7AT,p,rbie-C, opo0O po0 pro 0lS5ro~7 dop pwlI 525 354okUIUm S,fr ko,.oyod,w CYGNET Software 24843 Del Prado #141b Dana Point CA 92629
Edition: Model Aviation - 1990/01
Page Numbers: 52, 53, 157, 158, 159, 160
ORBITER name Hand-Launch Glider kit Dodgson Designs quite de parture Boh Dodgson two reasons First designed Bob Erie Jackson Portland second its built-up wood con struction instead Bobs normal fiberglass-andfoam technology H-L Gliders gaining more adher ents because theyre great way getting few flights during lunch Also can learn thermal planes up 15 ft thermal ing 150 ft seems like piece cake Eric flew Orbiter Nats H-L event finished fifth behind some pretty heavy competi tion likes Wurts Martin Jolly Har ris ship has 59-in span 432 sq area Selig 4061 airfoil weighs 17 18 oz miniradio three servos Whats unusu al Hand-Launcher features ailerons roll control flaps optional report Bobs Second Wind bian nual newsletter After flying season flapped version Orbiter Eric has some sights using flaps really light lift cant quite climb out marginal thermal Eric cracks little positive flap about %2 root trailing edge allows him turn tighter fly slower climb faster positive flap elevator compensation also gives him effect slight Up elevator maxes Nats Eric reflexed flaps thermaled plane inverted about half max Eric says hasnt found reflexing TE increases launch height usually launches neutral flap really light air sometimes launches %2 positive flap going back neutral just before tops out Orbiter kit $65 plus shipping Its best send two stamps Bob complete catalog mailing info Second Wind newsletter published twice year $1 per copy cash OK contains tidbits interest espe cially Dodgson Designs kit fansof number steadily growing Thermal contest fliers have found Bobs Lovesong tough ship beat address 21230 Damson Road Bo thell WA 98021 modeler steps up October 1989 col umn pumped Oly II pilots consider mov ing up Sagitta gitta fliers advanc ing aileron ships Going more ca pable planes think biggest kicks can experience fantastic hobby column used analogy full-size Soar mg ie transition trainers up 15Meter Unlimited racing ships pitch prompted Bill Anderson Laguna Niguel CA write Ive never written before enjoy col umn MA very much Ive Sailplanes 25 years have fun enjoy ment still reason letter column about full-size Sailplanes think must have gotten Schweizers mixed up Although some 2-22s around its 233 main trainer new glider pilots 1-35 built Standard Class com petition ship intermediate type happen know little about Schweizers because own SGS l-26E serial number 518 Al though Ive full-size soaring year know 1-35 ship can jump trainer 1-26 considered intermediate 1-35 might interested know rea son got full-size soaring because ing some research Scale RC project Steve Moskals 1-26 construction article February 1988 issue Model Avia tion took ride signed up lessons soloed about 15 hours began looking own 1-26E located purchased good Mo desto CA 1-26 Well its favorite ships long time Steves construction article appeared MA just start building seeing full-size ship knew would just matter time until got flew Its great ship Quick responsive thermals best joy fly thrill minute model flies just like big fly off slope Harley Michaclis newest designs span spectrum technology Experimental Roto 1 L uses pivoting wings roll longitudinal el evator control Wing also has camber-changing flaps Stabilizer fixed position Hed like other modelers try scheme infor mation column Easy Eagle R Two-Meter trainer kitted Ace RIC Inc Control surface hinging via Harleys rubber hinges Dodgson Designs newest kit Eric Jackson-designed Orbiter Hand-Launch Sailplane Flat wing tells uses aileronsunusual ship size Flaps optional Eric R did very well 89 Nats Kit sells $65 plus shipping Its wood built up 52 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 agree about progressing models higher performance Its lot fun challenging Im enclosing two pics model other full-size 1-26 kind letter love get nec essarily bits pointing out slips because Bills experience shows closely modeling full-size soaring can come together Its either/or situation Id bet model Sailplane fliers all-around aviation nuts would jump chance try full-size too could would interesting hear fliers both Harley Michaelis retired insurance agent Walla Walla WAbut should have aero engineer because hes mechanical ge nius Harleys Roto experimental ship designed test wing system incorporates twist wings roll pitch control plus flaps Think about minute wings rotate opposite directions aileron roll action ro tate together elevator pitch control top full-span flaps can used camber-changing time Harley showed Roto 1 Richland Fun-Fly Roll pitch work off two servos transmitter elevon mixing capability third servo all-mechanical flap system dont ask explain worksall know does Harley flight testing Roto 1 would like few experienced Sailplane fliers join forces him continuing development program would involve building test flying Roto experimental planes reporting results back Harley Obviously program isnt faint heart Only first-class scratchbuilders lots time skill need apply Harley has made up information packet contains discussion sheets drawings vari ous linkages scale drawings Roto etc readers interested receiving packet Harley would like send him $3 cover postage copying costs self-addressed 9 x 12-in envelope address 26 South Roose velt Walla Walla WA 99362 Harley also sent better picture Easy Ea gle trainer described September col umn very practical-looking Two-Meter kit features flaps new Selig 7032 air foil Harley course uses rubber Harleys Hinges Easy Eagle work great Both kit hinges manufactured Ace R/C Inc available local hobby shop Soaring handicaps Most people familiar Continued page 157 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Attractive case included ...~Wraparound frame fits comfortably over mast prescription glasses Blocks harmful ultraviolet radiation Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available in Clear shop work 81325 Amber overcast days & late afternoons S1495 Gray S1495 & Mirror Si 995 sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved bim serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer ____________Pikes Peak RC Club Prices include shipping handling E9Jpiii See hobby dealer first inininin doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 ICont US Mississippi 1601 924-9640 SCALE RADIO CONTROL 0 VINTAGE sizes2hz 3/431/i 133/4 11443/i 1A5 1/61/a WHE CONTROL-UNE SMOOTH CONTOUR 3/4234 1314 114334 11/24/z 214514 VISA/MC ELS FREE-FUGHT 00 GOLDEN AGE sizes214 31/a 1334 11443/a 11/25 17/a6/z NEW BALLOON 2hz4hz 314514 3 34 January 1990 53 Bill Anderson wanted some Scale re search -scale Schweizer 1-26B model building AboveMA Febru ary 88Plan No 578 went air port got ride full-scale Sailplane loved much went get pilots license bought used 1-26E Below SUCKER-KIT55995 tiVHS Show & Tell Video $3995 Add $400 shipping & handling MI residents add 40/0 sales tax 0 C c 5Send 3100 SASE Icr producl lid samples real weed veneer skins Product List Includes Gapless Arrow Shall Hinges carbon Tow Mylar Sheet E -Tech items er Inquires Welcome C SEND CHECK OR MONEY RDER TO J'5 -sPO Box 866 0 Lapeer Ml 48446 313 664-3330 imposits Aircraft Eng & SupplyFAX 664-9780 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS Send $3 fully illustrated catalog theac other kite accessories ~ ~DEPT MA PAWNEE ST SAN MARCOS CA 9 words optically coupled speed controls must designed way scratch Sorry Please re fer December 1989 column discus sion about installing RF chokes Other reader reaction has taken two sides writing no problems nonoptically coupled controls noth ing problems guess someone has installation noise-free despite hardwired optically coupled speed control its very hard understand optical isolation would ever needed contrary fashion motor noise problems quite aware unpleasant sometimes downright nasty situation can Remember different power systems speed controls radios can act react completely differently fact Ive seen two receivers same manufacture type function differently respect motor noise So fortunate have no such problems please dont conclude gen eral no such problems did youd dead wrongand could happen very next system since should reading some what just prior holidays please accept sincere wishes very happy holiday season great Electric New Year RC Soaring/Blakeslee Continued page 53 handicapping systems used bowling golf hadnt heard being used Soaring until read about Diablo Valley Soar ing Societys new system club contests fine newsletter Thermal Tales Co-editor Pete Thompson explains works executive committee decided needed some way fledglings less experienced fliers feel less intimidated better per forming pilots whole idea course encourage participation have fun club contests Accordingly club has adopted handicap system club contests lieu class system have employed date Objectives 1 Permit members varying skill lev els variable performance capabilities com pete together relatively equal chance winning 2 Provide vehicle assigning members teams desired 3 system should responsive individuals current performance System 1 Normalized score actual raw score di vided perfect score times 1000 2 Fliers average mean last four normalized scores 3 Handicap computed 70% differ ence between fliers average 950 4 Handicap added pilots normalized score determine final score 5 Annual championship determined adding nine best final scores during year Other miscellaneous facets DNF did finish day will included fourmonth rolling average although would part season total Popoffs should allowed everyone handicap over some number like 100 150 Fledglings may turn trans mitters over experienced fliers get out trouble long returned pi lots safe control recovered Handicaps calculated first Diablo Val ley contest under new format ranged low 6 Bob McGowan up high 257 As turned out Bob off day raw score 748 So final score 754 other hand Don Anthony hot day scoring 954 scratch would have won him contest handicaps adding 168 handicap gave him final score 1122 points big winning margin Pete says go ing evaluate system worked 89 maybe reset some parameters 1990 Any other clubs want give try Sportsman Multi-Task news Feedback just starting come SMT activities As probably know 1990 will SMT develop mental year encouraging clubs add some type Distance Speed task traditional Thermal Duration contests lots ways Speed Distance tasks can run below make things equal less intimidating Sportsman fliers SMT Committee recommends 75-oz limit planes Id like print couple recently received items just give flavor whats happen ing first letter Ray Hayes Secre tary LSF After reading October column couldnt resist sending attached article Ray sent copy Dan Pruss Soaring column February 1980 issue Model AviationBE putting SMT contest today Id use --maicnea rerormance system TOP PERFORMANCE K&B tNGINES AirplaneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POXY RtSIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS January 1990 157 NATIONAL CHAMPION ** THE PIXY HAS DONE IT AGAIN IT WON THE US NATIONALS IN 1989 JUST AS IT DID IN 1985 ESTABLISHING THE PIXY AS THE TOP 2-METER COMPETITION GLIDER TODAY DAVE BANKS IS THE WINNING PILOT FOUR OTHER PIXYS TROPHIEDI 4 MATS WINNERS DAVE BANKS PIXY * laad*lrnpoloeawswoatdsg * * U-AammI Newelettor SECOND WID Ia Now Available SI par year * 21230 Damson Road Bothell WA 98021 206-778-8067 Put Fun Back Fun Fly Get ROUN TUIT Today Its round sflat flies 30 Flying DISC STOL SUPERIOR Small Field FLY Aircraft STABLE PREDICTABLE EtAGILE $43plus *4 shipping TX Res add 7% sales tax VISA Foam ft Lite Ply Construction ELE VON Mixer Included 25- 4B cid 3-3Slbs Accurate QUALITY Materials Wing span 64 semi-symmetrical Wing area 736 sq Length 45 Weight 41/2 5 lbs Engine 35 40 TS 4 channel radio reauired SCEPTER Fast Highly Aerobatic Sport Plane Wing span 60 semi-symmetrical Wing area 540 sq Length 42 1/2u Weight 5-5 /2 lbs Engine 45-60 TS 4 channel radio required Certified Checks money orders Michigan Residents add 4% sales tax Personal checks Allow 2 weeks clear COD add $300 ign Add $1500 MODELS INC 285 FIRST ST PO BOX 130 FREELAND MI 48623 517 695-5385 Man turer Hi Performaftbtati andraft CULPEPPEE C MODELS INC 2526 Washington DubuqueIA 52001 3191583-4530 SQUARE CUT Tools __ 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dealer/Diatrlbutor Inquirm. Invited Pier di Re dents Add 6% Sales Tan original format described Dan single change very efficient contes tants enjoyed emphasis Distance best part about current interest SMT taking positive step using organizersupplied winches rather trying change current F3B rules Proving theres nothing new under sun 1979 Ray Fort Wayne LOFT gang put sizeable F3B-type contest incorporated ideas talking about now Ray didnt have restrictions planes must remembered still early years RC Soaring An interesting sidelight about contest famous Airtronics Sagitta introduced Lee Renaud given prototype Sagitta kits nine top pilots condition fly LOFT contest nine Dwight Holley went win World Championship 1981 Gobbler 1979 Sagitta considered pretty hot F3B ship Remember 1977 Skip Miller won first Soaring World Championships Airtronics Aquila Today fully sheeted straight wings addition ailerons Sa gitta would make fine SMT plane highlights Ray ran contest e round consisted Speed Distance task Duration Distance task putting emphasis Distance Three organizer-supplied winches used No working times used e No man-on-man scoring used flight scored against best flight task Speed flown rotation time Distance flown two time using four-minute flight time Dura tion flown three time using F3B Six-Minute Precision So Ray said format would still good way hold SMT contest Manpower flagger requirements Distance reduced because two planes flown time next news quickly grabbed attention SOAR club Chicago newsletter ed ited Tom Kallevang August Jim McCar thy held SOAR Sportsman F3B contest novel twists Speed run minimum cap 30 seeFIBERGLASS PARTS Carry over 300 cowls 70 wheel pants made epoxy glass lightweight brittle zero pnholes Send SASE $100 latest cataloa onds did exactly 30 seconds got 1000 points did under 30 seconds still got 1000 points Times over 30 seconds normalized 30-second cap lowest time happened over 30 seconds didnt happen contest e Distance run three set target levels six eight 10 laps per round first round target six laps made six laps scored 1000 points target next round eight laps didnt get six laps target stayed six laps etc Duration per F3B rules working time flown man-on-man love see kind stuff shows guys putting ol gray matter work inking up new original ways run Speed Distance tasks Ive heard max imum caps speed task like 35 40 sec onds admit never thought mini mum cap idea Also increasing target laps Distance very imaginative ideas good because keep Sportsman pilots thick contest Lets hear about club running SMT contests Understanding Ni-Cds following article Brian Chan appeared South Bay SS newslet ter under heading Low-Tech Stuff Everything wanted know about Ni-Cds afraid ask John Dvorak edits excel lent Silent Flyer newsletter has tradition printing informative original articles think timely review Ni-Cd batter ies because us colder climes can use slack time make sure packs top shape Brian known Dr Chan friends because skill stitching up sick ships Most RC modelers use Ni-Cd batteries radios yet few seem understand well rest equipment article about workings Ni-Cds digging too deeply technical explanations goal help prevent premature battery failure keep explanations simple well discuss 500-600 milliamp-hour cells come RC systems Fast-charging RC car Elec tric flight power packs require different treatment 158 Model Aviation ! DOUBLE VISION! THE iWO IN ONE TRAINER STABLE HIGH WING PLANE AND AEROBATIC LOW WING ALL IN THE SAME KIT CI areor scralcfl Oulloer SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined nickel plated steel Order set todayl See Dealer Cataloger Order lIf dont carry Sgaare tst Tasla call pay far call well pay far shipping us sad Canadal C 00 Eatra r & D FIBERGLASS SPECIAL 38624 Mt Kisco Sterling Hgts MI 48310 Call Us 313 978-2512 *New Owners * Steve & Km Durecki z PRACTICAL SIZED GIANT SCALE MODEL PLANS F bergiass Cowlings Canapes Ava ab e F-i5 Span 77 DC-31 1/2 1140Span$4200 F4U CORSAIR2 1/4 193Span$3000 A6M5 ZERO2 1/2 191Span$3000 Plans RK-20 CURTIS P402 1/2 194Span$3000 K-740 Ducted Fans AT-6 TEXAN24 1101Span$3000 ntom 35 Span SIO00 F8F BEARCAT2 112 186Span$3000 gen 32 Span $1000 FOKKER DR-i27 163Tripe$2700 5 36 Span $1000 ___________________________________________Catalog Plans Accessories Supplies n Canopy $1500 Order FromCredited First Order $25 More_______________________ Nick Ziroli29 Edgar Dr Smithiown NY 11787 USA516-234-5038 1 long should batteries charge lot Room temperature efficient remains state discharge damage can normal 50-60 milliamp chargers charging charging temperature although 50 -90 F quite caused cell reversal should 14-16 hours no matter little bat- acceptable Charging extreme temperature can 8 What about accidental reverse charging tery has used previous discharge cause damage Discharge rates reason- inadvertent complete discharging Complete ensures cells fully charged able 0 120F efficient dis- discharging under load will probably cause time entails no risk damage due charge temperature about 90 freezing cells reverse polarity will reverse overcharge able hand point Ni-Cds lose about 10-15% capac- charging low rates may cause perma end period charge few hours ity nent damage Charge battery 24 hours dis longer rather stoping early 100-hour over- 5 much discharge time can expect charge through controlled discharger battery charge C/10 rateC being amp-hour freshly charged batteries Most transmitters cycler recharge 15 hours again dis rating will cause damage battery use about 150 milliamps gives about three charge through discharger Time final dis has left completely discharge 24-hour hours switched-on time although new com- charge ascertain damage has caused charge advisable time charge puter transmitters might have higher current have occasion accidentally left night before want use model Ni-Cds draw Flight pack durations vary enormously ac- transmitter on occasion batslowly lose charge its best charge un- cording use receiver itself draws 10 tery fully recovered til intend fly to 20 milliamps servo motors draw con- 9 deal memory after re 2 long batteries keep charge siderably series experiments pro- peated partial discharging soand should top off charge model duced following results should called memory effect does happen prac stored winter Sintered cylindrical cells treated very general guide tice Yes surprised too learned pencells will self-discharge room tempera- Two-channel Thermal Sailplane intermit- manufacturers say unable pro ture about 20% per month completely dis- tent stick usel00 mA average current draw duce effect except carefully controlled lab charged four five months prob- five-hour expected battery time tests conclude must effect ob lem can stored state charge al- Four-channel Thermal Sailplane served before battery-manufacturing technology indefinitely significant loss life servo continuously used three servos intermittent reached todays standards Topping-off unnecessaryperhaps waste- use150-200 mA average current draw 25- 10 What does mean crystals form ful Just charge completely discharged packs 3-hour expected battery time cells usually quite harmless 24 hours before use F3B-type Sailplane six servos continu- caused minute porosity sealing ring 3 Should fast charging trickle charging ous use270-330 mA average current draw 1 s- Electrolyte reacts carbon dioxide air used No Stick standard C/l0 rate 50 2-hour expected battery time forms crystals potassium carbonate Wipe 60 milliamp charge Trickle charging may re- 6 What life expectancy battery crystals off dry cloth smear little duce useful capacity cells particularly Most Ni-Cds will last 800 000 complete cy- silicone grease prevent further growth used continuously Fast charging well des cells partially discharged Crystals may also form around safety risking reduction battery life capacity cycle life expectancy substantially in- vent cells have abused gross overwhen properly controlled inefficient Man- creased After periods mentioned cells charge overdischarge causing valve ufacturers usually recommend charging useless capacities reduced open lose little electrolyte com 70% 80% capacity must fast charge 7 Does stalled servo ruin battery monly called venting situation usually properly carefullystudy manufac- stalled servo draws about 400 mA there- doesnt happen unless cells have fast turers instructions fore discharging battery very quickly charged accidentally short-circuited Should 4 What effect does temperature have Quite itself does cause damage battery suspect has happened check loss OUT OF THE ASHES .. THE WINNERS CIRCLE PHOENIX SPAN 132 AREA 1047 SQ IN WEIGHT 7276 OZ AJFlFOIL 84061 WiNGLOAD 10 OZISQ FT ASPECT RATIO 1671 ______________________ COMPETITION PRODUCTS -1-921 BIRDIE WAY APOLLO BEACH FL 33872 ____________FOR ADDONAL INFORMAllON SEND LBASE813 845 5171 January 1990159 td Co aiIn*t nmn~ Only certihed checks money orders accepted Minimum order S 1200 ihme packages old Pomerpoles $350 per package tisO shipping handling CT residents add 75% sales las Prices sobiect chasge notice DEALER IF4OUtAIES INVITED tother intormalion dealer onces send SASE Rosiness Card SERMOS RIC SNAP CONNECTORSInc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 Smal stanwed aett-sddrcind cowiope tar pncusa individual cfsnisicns Add 5300 fir COD Parrish Aircraft & Scale Models 1125 SW 4*bTefhntstloe1 333tT 305 581 4477 SAVE YOUR FIELD SNUF-LER muffler Ia low cost easy install lightweight sound reducing muffler no performance penalty answer AMA muffler rule suggestions saving flying fields Meets AMA muffler rule suggestions SNUF-FLERTM 3 10 decibels quieter stock muffler MUFFLER No power loss wIth possible 300-500 RPM increase patented Improves engine idle s better fuel economy Easily attached 25-108 stock mufflers Heat corrosion resistant Black E coat finish No special adapters required Weighs 35 025 Fits ASP BRAT ENYA FOX HP IRVINE K & B 05 MAX ROYAL VS SUPER TIGRE mufflers II available hobby shop ORDER DIRECT immediate shipment Check MO Visa MC. CODSEND 2Sf STAMP accepted Add$250 tsr UPS $200 COD and6% salestasFOR ADDITIONAL INFO Lfor Cald reodentAND JTEC CATALOG capacity discharger 11 aviv need cycle battery Yes Repeated charge discharge cycles low current levels such experience RC tend form active materials cells large crystals thus lessening active surface area Although does affect capacity battery does tend reduce discharge voltage can adversely affect operation equipment course time Perform ning few controlled cycles higher charge discharge rate reduces crystals effectively re vitalizing battery Discharging 11 volts per cell considered full discharge battery cycler available few dis charges through controlled discharger de scribed below time followed 24-hour charge radios 50 mA charger pro vide acceptable quite efficient alter native cycling should performed once twice year depending much use equipment 12 What happens cell goes down cases unless battery has severely mistreated will have caused inadequate charging ie trying recharge amount battery has dis charged Because charging about 70% ef ficient takes 14 15 hours put back 500 mA safer regard cells being fully discharged time used individual cells battery slightly different capacities weakest cell ie. lowest fully recharged time will start lag behind others capac ity Eventually lag will cause cell dis charge completely partway through discharge cycle entire battery pack results will obviously disastrous happens flight Normally condition one-cell discharge will cause cell reverse its polarity thus lowering batterys voltage over two volts unless left state long period se vere permanent damage should result partic ularly pencells Recharge check bat tery described above remember fully charge time future 13 can check capacity bat tery cvcler Build controlled dis charger can made quite simply requir ing few resistors spare charger plugs voltmeter stopwatch circuit de scribed below discharges about 230-240 milli amps uses cheap resistors can built about hour operate instructions receiver transmitter instructions brackets [I After charging battery least 15 hours connect voltmeter points B [A C] discharger connect dis Rx Jack resistors 820 5% Unit de signed discharge ONE pack time Av erage current drain about 240 mA charger plug appropriate battery volt meter should read 5-6 volts [10-12 volts] will drop about 475 [95] volts over next 90 minutes As endpoint reached will drop about 45 [901 volts over 10minute period drop 44 [88] volts over five minutes final useful voltage Disconnect battery make note total time discharge Around 120 minutes indicates good battery Much less indicates low capacity low capacity suspected recharge battery 15 hours repeat discharge During discharge check voltage 10 minutes until voltage drop begins ac celerate watch closely making sure disconnect 44 [88] volts Keep record discharge times comparison future checks possible equip yourself battery cycler like Ace RIC Inc Digipace BB cycler much preferred over manual discharger because does everything described above automatically recharges both packs discharge cycle completed cost crashed model much price cycler RC Pylon Racing/Hager Continued page 55 RPM Header only16000-16100 pipe 15200 Comments Picco Q500 engine uses upper-end parts piston cylinder liner conrod wrist pin same catalog numbers shown rear-intake marine/FAI/Formula version liner has approximately 1800 ex haust duration puts piped sleeve category above results show Rossi gets very little boost pipe Picco gets plenty Rumor has Webra engines also run much better pipe havent tested yet Anybody got theyd like loan testing other hand stock Picco pipe ap pears long enough help en gine actually detune hold back Somewhere between stock MACS pipe length stock Picco pipe length predict 160 Model Aviation plane desogned meet QSPRA Fonnula 120 nales 1/4 scalemodel accepts 60120 ci engines Features Epoxy glass fuselage foam wing contnaction Dursi landing gear scale landing gear add $1500 erharK wS MINI-JET SERIES planes feature balsa constmction Designed intermediate flyer mind will accept 25 32 size engine uses rear exhaust engine exceptional perfomance Get thrill jet hassles ducted fan $5 AACI Win5 Spain Laigmud -0 nisjn ins osity fly Wim sina 720 sq si Bns 454 cycle ir40 2 cycle also amitable fcx tarp electric mum Plans Cowling andAmg Ribs also sold Full kit $8500 Please add $400 shipping turn printer mote airfoil plotter FOILED AGAIN! OT AIRFOILS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 ZZ o,,ooJOMdofrf US$50 Rqo OMPC 7AT,p,rbie-C, opo0O po0 pro 0lS5ro~7 dop pwlI 525 354okUIUm S,fr ko,.oyod,w CYGNET Software 24843 Del Prado #141b Dana Point CA 92629