Radio Control: Electrics

THE SECOND ANNUAL Dallas Electric Air craft Fliers DEAF Electric Fun-Fly scheduled Saturday October 1 1988 Flying times 900 am 500 pm Enatfield Col lege Mesquite TX complete information contact Frank Korman 5834 Goodwin Dallas TX 75206 telephone 214 821-0390 Last years meet attracted 13 participants 50 aircraft Id expect bigger turnoi4 year Cause Electric growing ra pidly grnwth includes both numbers f meets numbers meets exemplify what just said above last week end saw First Annual Lehigh Valley PA RC Club Electric Fun-Fly go down history amazing success Ill have details fu ture now some preliminaries Saturday saw largest participation beautiful weather very impressive field Dur ing afternoon lineup counted 41 planes know several around cars over-20 attendance came several surrounding states everyone great time fun-fly format few simple fun opportunities scattered throughout both days such loops minute event taxi event timed events etc done shutting down field werent participating could continue flying Sunday brought comparably nice weather Fathers Day lower attendance folks LVRC did great job very positive reaction first-time meet will surely result another next year interesting little story about pect meet turned out partici pants experiencing considerable difficulty getting planes take off appearanc es great field large flat closely cut experienced same difficulty wound up hand-launching four-year-old plane has made hundreds flights has never NOT got ten off ground Well turns out LVRC invested high-quality grass seed nottoo-old field dam stuff just seems grab hang onto wheels goes rule thumb power needed ROG next column will have some photos details meet dont have pix out developing yet way next col umn will December issue since Novem Yet another Amptique derivative pictured herein time its Freaktique Vernon Woody Wood Doylestown PA YES thing started Out life Amptique kit Woody brought imagination creativity bench Out came Freaky creation powered direct-drive Astro 15 cobalt using dozen 900-mAb cells really goes Ive flown it delight Appearance overhead 50 Model Aviation Radio Conoi S Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Vernon Woody Wood Doyiestown PA let imagination run riot building Amp tiquel Its Freaktiquel Motivation Astro cobalt 15 direct drive dozen 900-mAh cells Jomar speed control Flight characteristics amazingly good See column ber annual Nats coverage issue inside scoop John Hickeys Astro Challenger business end Top shows neat stallation K&W folding prop modified prop slots opened up Goldberg spinner Switching arrangement right behind cobalt 05 L Note airscoops side fu selage keep seven 1 200-mAh cells cool Two-step switch assembly R driven miniservo Scheme allows soft start reduced load switch contacts Large wire coil nichrome-wire resistor very low resistancel used start circuit info column awesome fact appearance ground awesome Nice work Woody OK readerslets get Amptique nifty kit pmduces nifty plane just begs personalized embellished Lets see what can come up Send photos descriptions Amptique derivatives Ill best get em column Maybe get enough can have some kind reader vote best worst just bought another Amptique kit myself aint sayin what Im doing just yet Challenger mini-sequence introduced column two issues ago month offers some about plane just caine up mini-sequence name means more-than-one columns coverage particular item topic Past examples have included Ca liph Amptique competition rules larger power systems etc Three photos month show some interesting installation detail John Hickeys Astro Chal lenger John Hatfield PA chose control 05 geared cobalt servo-driven switeh no ordinary switching arrangement attempt minimize very severe startup current surges John arranged two Astro microswitches close sequence drive servo Continued page 154 Under hood Fred Ewings family wag Part resting atop battery battery connectorladaptor described column Note cramped quarters charger leads must go Car battery type side termi nals Old-style type top-mounted ter minals easier Electric fliers use Best Europes leading manufacturer Pilots supply fully positional figures National Scale Champs dress pilots known apparel Accessories include Helmets Goggles Sun Glasses Bobble Hats Baseball Caps Floppy Hats Bone Domes Oxygen Masks Maewests popular types WW WW II sports one-piece suit stripes colors NATO one-piece suit map pockets olive green glider pilots turtle neck sweaters floppy hat sun glasses Standard pilot tan pants simulated leather jacket fur collar baseball cap sun glasses pilots lightest ever come painted dressed ready fly 1/4 Scale Phis$5OOpostagand handling % Scale airmail Have fun 1/4 Scale parachutist ram chute rip-stop nylon ready servos Takes standard flight pack makes Plus *10 Easy Ordering. fast deliveryPostage Handling send phone VISA MasterCard Number AH DESIGNS BI OLD WORKSHOPSTeL FFORDDDERWEN CL WYD UK 2YR0745-53987 B&P Associates Gives Total Fligbt Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field October 1988 51 1 Scale 1 Scale PRICE REDUCTION SALE five models speed controls employ latest MOSFET/HEXFET technology feature fail safe finer shuts down motor event transmitter receiver receiver battery failure CompleteAssembled ModelParts Kitand TestedPCBMOSFETS EKE-24C$1950$2550$ 350$1250 EKE-7R$2500$3100$ 350$1800 EKE-7RM$2600$3200$ 350$1800 EKE-24U$2800$3800$ 800$1200 EKE-FR$4000$5000$1000$2400 EKE-FB$3500$4500$1000$1500 EKE-24U FB Upgrade Kit withorder$ 500 RBV-4$1595$1995$ 500 EKE-24C isa forward Only throttle uses ito 24 cells size 1x3x75 EKE-7R isa full forward half reverse handles 4107 cells size 1X45X75 EKE-7RM mini version 01 7R size 14X27x6 EKE-24U micro version 01 EKE-24C smaller existing micros EKE-FR full forward full reverse handles 4 7 cells size 14x2x6 EKE-FB full forward brake handles 4 14 cells size 14x2x6 speed controls tully proportional both directions RBV-4 board receiver volt meter uses 10 leds three colors non-warranty repairs normally $1500 repair fee Please send $200 postage handling per order Also send SASE information assembled speed controls carry full 90 day warranty Enclosures heat sinks also available Mail ELDENOKEN ELECTRONICS INC PO Box 1853 Arvada Colorado 80001 today 303 431-1328 Vi Mutucard acceptad ris 4 thumbing through old model maga zines recently came across following Air Trails November 1943 Allison engine has 720 parts compared 2300 Merlin Isnt mind-boggling RC Giant Scale/de Vries Continued page 49 well retracts worked bird very stable Making pass down club field run way heard sharp crack ominous sound unbalanced engine Curtiss wouldnt answer controls assumed 150 nose-down attitude nothing Bob could watch Giant P-40 powder itself Post-mortems deter mined part multibladed flight prop given way resulting major vibration rendered servos powerless offending blade parted well outboard propeller hub lest conclude glue joint failed Brian OMearas propeller problems bit different cowl Thunderbolt came adrift slipped forward prop Pieces seen leaving model turned out hunks razor-backed Jugs windshield canopy surmised sliced off propeller fragments Skillful pilot OMeara did have some control over bird wasnt totally destroyed crash sound engine made indicated least part propeller still attached drive shaft both instances however results similar pair Giant Scale models de stroyed disintegrating propellers moral check props cowlings before flight Its cheap insurance have replace 10-buck prop Its less ex pensive check replace overstressed ag ing cowling mounting pads bolts Gosma have skip next months colnnm cause annual coverage Nats See again December issue advances setting first switch close activates motorbattery circuit some on-purpose resistance series lhis fractional-ohm resistor loosely wound coil nichrome wire seen photos happens motor gets soft start because smail additional resis tance limits otherwise very large current surge Shortly after closure second microswitch closes servo motion continues effectively bypasses resistor thus applying full battery voltage motor Similarly two switches open reverse der during shutdown now resistor con nected series braking switch contacts stop-current surge comparably minimized two-switch action happens quickiy transmitters throttle stick ad vanced retarded Im sure results Join Ole nAL ~~0 IMAA 1ff "nC/ ggO Far Membership Information ---Contact Robert A. Blaney o Secretary IMAA 14 Parkview Road Long Valley NJ USA 07953 -4 154 Model Aviation L OPS 18 xi engine quarter scale Contact us free engine test results 5~sPwPIeof CoI%*eta% 9m64 9uec $75-$l0Owhich good O&RRC Electrics/Kopski Continued page 51 r RIC WONDER JUICE NOW IN 2 FLA VORS W4Y% JOURNAL OF JOuRnAL Oi THE AIRPLANE 1920 1940TIlE EARLY AEROPLANE Leo Opdycke Editor Kenn Rust Editor WW1 AERO 1900-1919 SKYWAYS 19201940 two Journals contain information current projects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 e~*pted INC 15 Crescent Road Poughkecpsie NY 12601 USA 914 473-3679 RYAN i EASY FLYISG SPORT SCALE 1/5 AEIIONCA L1bBtl4 IS SPAN 2 OR 4 CYCLE 60 80 ENGIS FEATUR IS MAY 87 SCALE H/C M 1/6 RYAN HI MAILPIAllE 72 IN SPAN 2OR4CYCLE6O-8OENCnJS FATR OF Tl SPISIT OF ST LOUIS 1/4 AERONCA L3 105 IS SPAN 2OR4CYCLE90-15ENGINES USAAF WII C5SHOPPERt 1/4 DRUflE TURBULENT 65 IS 2 OR 4 CYCLE 60 80 CflES Tl MORT FAMOUS OF HOUILTS ROLLS PIAN SF15 SHPflIG Tfl & n&au $2500 - NYS ADD TAX Lnaitl.[ASS CflS NE~ FOR AERONCA L16B & L3--FR0M FISERGIASS MASTER AERO PlANS N PARTS PO BOX 939 N NY 14760 1 7I 372 UAtITY IANS HISTORIC AIRCRAFr greatly lessened abuse switch contacts John kind guy likes things very well has just what stop-current surge men tioned above realize some may permanent-magnet motor like ones use Electrics will rotated some external means develop voltage its terminals other words acts generator motors normally just thatmotors means apply voltage run suddeniy remove applied voltage turn off switch motors tend continue rotating generate voltage same voltage value exists just after opening switch applied switch closed because rotational inertia keeps armature spinning Braking motor makes use character istic applying short circuit very small re sistance motor terminals immediately after switching off battery voltage puts electrical load now free-spinning motorturned-generator causes rapidly slow down stop other words load gen erator since no external mechanical drive keep turning stops Now happens kinetic energy associ ated spinning armature moment power switch opena can rather large energy has go somewhere brake appliedand does takes form large current subsequently large power dissi pation flowing through armature windings wiring external resistor switch con tacts etc course action oniy lasts short time armature rapidly slows stops Thus normally closed motor con trol switch contacts close brake spinning mo tor may very well experience about same surge current normaily open contacts close start motor first place YeahI know Just read agaln couple times will make sense Now please dont anyone write ask can recharge motor battery using freewheel ing prop during glide time generate needed power answer will No reason answer attempting charge battery such little windmill gross mismatch task tool Its sorta like trying drive railroad spike tack hammer effect prop-cum-generator would have deliver several amps whatever battery voltage translates wattsand just isnt enough wind little mill job get real feeling try spinning prop rapidly finger brake Now imagine slipstream around gliding plane trying substan tial task charging battery OK Charger connections auto battery can particularly testy some newer car bat teries having side-mounted connections seems ever since configuration introduced cars people have nothing trouble con necting using battery jumper cables emergency jump-starting Personally Id have fired klutz came up idea first place Nevertheless sad dled inconvenienceespecially Electric modeler depends car battery source fuel charger Enter now famillar name Fred Spor tique Ewing discovery adaptors de signed fit inconvenient side-mounted battery terminals Freddy found accessories local auto parts chain store installed could easily clip 156 Model Aviation COVERITE 420 Babylon Rd Horsham PA 19044 NEW FORMULA FOR FILM chargers leads photo shows such adaptor turns out kind adaptor market descriptive name used part side-terminal charging clamp suggest shop around auto parts stores see what suitable use car word caution however Ive noticed often side-mounted terminals lo cated such make access rather difficult cramped quarters Please VERY CAREFUL inadvertently short hot battery terminal auto metalwork working Most cars have negative ground hot pos itive line short youll really get demonstration much energy lurking fully charged auto battery Gas flying friends often subject some fun-poking Electric activity lo cal field steadily increases fact occasions exceeds wet power stuff flight line Most Electric fliers pretty friendly folks Gas guys arent times seems some justification must rendered noise goes along wet systems seems reason allow Gas guys around exhaust keeps mosquitoes down Now Im thoroughly con vinced must SOME reason Gas right Right Right me guys Just case may wondering too flew wet yearslike 25 RC flew EF Gas no muf flers before now Ive reached point life noise times really does bother flight line Personally can under stand neighborhoods may feel about lit tle airplanes buzzing around Now realize Electric Rubber HLG Towline whatever everyone has anyone Out ever heard field being lost due quiet Think about Id feel whole lot better about future modeldom mufflers worked whole lot better What has set off topic just retired 10-year-old lawn mower new came genuinely welcome surprise Its MUCH quieter can done model engines Unnecessary loss flying fields no help hobby large may facing real possibility might well consider very viable alternative Elec tric affords No longer can say Electric isnt good enough DO NOT let anyone convince Granted may preference does flying fall list things dont like Recognizing fellow Gas-flying hobbyists likely reading column Ill leave Electric fliers share thoughts above new Sanyo extra cells mentioned long ago December 87 column have fi nally found way hobby Ive read several reports application now have some 1700-mAli cells size weight 1 200s have yet chance try em out can say ever preliminary reports have seen seem suggest cells best suited applications involving very-highest currents rather full value best re alized low-current applications Ill have info future So ends first column sixth year Please forward comment question YALE HOBBY MFGU CO INC YALE REPLACEMENT MAIN SHAFTS YALE FLYBARS GMP Kalt Schluter Miniature Aircraft helicopters YALE CANOPtES orm Plastic White 3elcoat Finish Fiberglass Replacements GMP Kalt Schkiter end Miniature Aircraft helicopters HEAT SHRINK COVERING Men Tail blades Available black white red blue yellow Yaleweight Kit Two Pound Yaleweight Kit Mixing Arms Cobra/Competitor Training Gear -28 Size Helicopter Training Gear -40/60 size Helicopter Reinforcement Brackets Quilted Blade Covers YALE ACCESSORIES Allen Driver -3 mm Allen Driver -25mm Allen Driver -2 mm Allen briver 15 mm Flyber Weights Starter Extension Quilted Blade Covers Slide Stays available hellcopters guaranteed ROUND OFF IfThU4PIN does return 250 forPREWEIGHTED return shipment break4yArMAIN BLADES tip please send *500 Features Yaleweight installed returnholders attached white heatahrink included Modeler must cover balance TRU-SPIN CUSTOM-BUILT BLADES Features Weighted heat shrink color covering choice balanced ready bolt Heat Shrink colors white black red blue yellow Allow week delivery time Orders must prepaid paid credit card * Standard Tru-Spin Main Tail blades come white heat shrink covering Add *300 slot blades Yaleweight * Tru-Spin Rotor Blades superior quality lower prices Replacement blades available GMP Schiuter Kait Miniature Aircraft helicopters * Our blades come money-beck guarantee replacement item against manufacturing defects Send Price List INSTANT SHIPMENT HOT LINE 407 4668883 Shipping/COD charges extra MasterCard VISA accepted No COD orders shipped outside USA Custom-built blades special orders must prepaid paid credit card certified check Dealer Inquiries Invited Yale product dIstributors Ace R/C Inc Greet Planes Model DIet Horizon Model Distributors ABC Imports eels UK Distributor WQBY MANUFACTURING CO INC 3696 Selvltz Rd Ft PIerce FlorIda 341 40734669983 tntgpOCIsuso1 ttM Out t4~9 6 gqiOO9O o 3tf 0 #October 1988 157 PS Im SIXTEENTh year flying Elec tric have nagging question grows continuously scope Electric grows matur ity What Earth air OHFIVE Doesnt sound like something ET would say Really folks Getting rid such nonsensical nomenclature LONG LONG overdue alternatives Please see column April 1987 issue MA RC Pylon Racing/Hager Continued page 54 registration given two cards numbered contestant number both with b cards placed under respective model contestant judges viewed aircraft getting no closer standing over rated no 30 seconds took less time Periodically judges would caucus add scores average nearest Ao-point have change might recommend would disregarding high low score averaging remaining four scores thereby eliminating controversy about judging own aircraft procedure went very well quick minimum gripes Try sometime procedure went very well quick minimum gripes Try sometime may like race Dave Shadel started off zero Round 1 result aileron servo failure detected before flew Now theres good plug checking controls before flight great air racers set personal best times including yours truly round two 10924 time turned Out Fast Time day end Saturdays fly ing two people perfect scores Larry Laulom Gary Hover Close behind ever group three point down several wbo two points down Sunday started off Round 6 Times wereagain extremely fast several 1 lOs llls being posted Round 7 Bob Smith set new fast time contest 10908 Round 8 saw little change final results Following years race once again annual Calcutta pitting 13 fastest pilots against other treated two fi nal rounds since everyone double-cut firstexcept Lee VonderHey planted borrowed racer around turn three finalfinal round saw Bob Smith Dave Shadel wingslapping other allowing eventual win ner Bob Dible scoot home flag Bob Dible bought Bob Smith way $70 very interesting Thanks great planning CD Jim Sneed key workers like starter Wayne Scuri event went extremely well Looking forward next year race results listed points/best time 1 Gary Hover 32/1 0924flyofO 2 Larry Laulom 32/1 1089flyoft 3 Mike Hen sel 30/111 61flyoff 4 Ron Mendel 30/ 11809flyoff 5 Gary Long 28/11588 flyoft 6 Ed Hotelling 28/114 12flyoff 7 Dave Shadel 27/11067 8 Lyle Larson 27/ 11159 9 Scott Manning 27/11291 10 Mark Lattimore 27/11711 11 Chuck Brown 27/12332 12 Bob Smith 26/10908fast time Best finish went Lyle Larson Calcutta winner Bob Dible received $67250 winners share Send stuff like contest reports helpful hints pho tos ideas Ill best get print Model Aviation Please note Ive got new address RC Helicopters/Jolly Continued page 55 cured fuselage shell places possible along its length next step mark position Hirobos tail rotor clamp resultant tail ro tor center Secure tail tube inside fuselage cut tube appropriate length usually use several formers help secure tube Now fabricate stub shaft-guide tube will reach between front end drive tube mounted fuselage through plywood wood blocks terminate just behind drive shaft coupler tail-drive gear have approximate length solder -in length %2-in tube over joinlng end stub tube can coupled drive tube makes easy removal mechan ics Now comes tricky part now have figure approximate length speedom eter cable have found best tool cutting Stainless Steel #11 Blades L-u Carbon Steel -$895 per 100 Stainless $1485 per 100 Delivered Check MO Visa MC Satisfaction Guaranteed Berkeley Trading Co PO Box 26 Berkeley Springs WV 25411 304 258-2773 A monthly publication covering international PC Soaring Scene US Sl7yr 24/yr lstClassJ In Canada/Mexico $22/yr US funds Asia & Pacific $28/yr US funds Europeand UK $28/yr USfunds Surface Mall Foreign S 18/yr US funds RC SOARING DIGEST PO Box 1079 Poyson AZ 85547 old timer perfectly proportioned modeung Curtiss Robin 049 EngIne -Channel A/C 41 Wingapan Eleotlic Power Optional 503 Very few lull scale eicaft ideally suited model flight appealing old curtiss Robin hors spruce linen age beautifully proporhosed fo ubbe electrIc glow engines Easy end fun build trainerlihe performance Flyline Models catalog flOe P0005 l03 273-0603 FLYLINE MODELS INC 7 PO Boa 2136 Fairfax Virginia 22031 USA 158 Model Aviation SASE please author address given very top column

THE SECOND ANNUAL Dallas Electric Air craft Fliers DEAF Electric Fun-Fly scheduled Saturday October 1 1988 Flying times 900 am 500 pm Enatfield Col lege Mesquite TX complete information contact Frank Korman 5834 Goodwin Dallas TX 75206 telephone 214 821-0390 Last years meet attracted 13 participants 50 aircraft Id expect bigger turnoi4 year Cause Electric growing ra pidly grnwth includes both numbers f meets numbers meets exemplify what just said above last week end saw First Annual Lehigh Valley PA RC Club Electric Fun-Fly go down history amazing success Ill have details fu ture now some preliminaries Saturday saw largest participation beautiful weather very impressive field Dur ing afternoon lineup counted 41 planes know several around cars over-20 attendance came several surrounding states everyone great time fun-fly format few simple fun opportunities scattered throughout both days such loops minute event taxi event timed events etc done shutting down field werent participating could continue flying Sunday brought comparably nice weather Fathers Day lower attendance folks LVRC did great job very positive reaction first-time meet will surely result another next year interesting little story about pect meet turned out partici pants experiencing considerable difficulty getting planes take off appearanc es great field large flat closely cut experienced same difficulty wound up hand-launching four-year-old plane has made hundreds flights has never NOT got ten off ground Well turns out LVRC invested high-quality grass seed nottoo-old field dam stuff just seems grab hang onto wheels goes rule thumb power needed ROG next column will have some photos details meet dont have pix out developing yet way next col umn will December issue since Novem Yet another Amptique derivative pictured herein time its Freaktique Vernon Woody Wood Doylestown PA YES thing started Out life Amptique kit Woody brought imagination creativity bench Out came Freaky creation powered direct-drive Astro 15 cobalt using dozen 900-mAb cells really goes Ive flown it delight Appearance overhead 50 Model Aviation Radio Conoi S Electncs Bob Kopski 25 West End Dr Lansdale PA 19446 Vernon Woody Wood Doyiestown PA let imagination run riot building Amp tiquel Its Freaktiquel Motivation Astro cobalt 15 direct drive dozen 900-mAh cells Jomar speed control Flight characteristics amazingly good See column ber annual Nats coverage issue inside scoop John Hickeys Astro Challenger business end Top shows neat stallation K&W folding prop modified prop slots opened up Goldberg spinner Switching arrangement right behind cobalt 05 L Note airscoops side fu selage keep seven 1 200-mAh cells cool Two-step switch assembly R driven miniservo Scheme allows soft start reduced load switch contacts Large wire coil nichrome-wire resistor very low resistancel used start circuit info column awesome fact appearance ground awesome Nice work Woody OK readerslets get Amptique nifty kit pmduces nifty plane just begs personalized embellished Lets see what can come up Send photos descriptions Amptique derivatives Ill best get em column Maybe get enough can have some kind reader vote best worst just bought another Amptique kit myself aint sayin what Im doing just yet Challenger mini-sequence introduced column two issues ago month offers some about plane just caine up mini-sequence name means more-than-one columns coverage particular item topic Past examples have included Ca liph Amptique competition rules larger power systems etc Three photos month show some interesting installation detail John Hickeys Astro Chal lenger John Hatfield PA chose control 05 geared cobalt servo-driven switeh no ordinary switching arrangement attempt minimize very severe startup current surges John arranged two Astro microswitches close sequence drive servo Continued page 154 Under hood Fred Ewings family wag Part resting atop battery battery connectorladaptor described column Note cramped quarters charger leads must go Car battery type side termi nals Old-style type top-mounted ter minals easier Electric fliers use Best Europes leading manufacturer Pilots supply fully positional figures National Scale Champs dress pilots known apparel Accessories include Helmets Goggles Sun Glasses Bobble Hats Baseball Caps Floppy Hats Bone Domes Oxygen Masks Maewests popular types WW WW II sports one-piece suit stripes colors NATO one-piece suit map pockets olive green glider pilots turtle neck sweaters floppy hat sun glasses Standard pilot tan pants simulated leather jacket fur collar baseball cap sun glasses pilots lightest ever come painted dressed ready fly 1/4 Scale Phis$5OOpostagand handling % Scale airmail Have fun 1/4 Scale parachutist ram chute rip-stop nylon ready servos Takes standard flight pack makes Plus *10 Easy Ordering. fast deliveryPostage Handling send phone VISA MasterCard Number AH DESIGNS BI OLD WORKSHOPSTeL FFORDDDERWEN CL WYD UK 2YR0745-53987 B&P Associates Gives Total Fligbt Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field October 1988 51 1 Scale 1 Scale PRICE REDUCTION SALE five models speed controls employ latest MOSFET/HEXFET technology feature fail safe finer shuts down motor event transmitter receiver receiver battery failure CompleteAssembled ModelParts Kitand TestedPCBMOSFETS EKE-24C$1950$2550$ 350$1250 EKE-7R$2500$3100$ 350$1800 EKE-7RM$2600$3200$ 350$1800 EKE-24U$2800$3800$ 800$1200 EKE-FR$4000$5000$1000$2400 EKE-FB$3500$4500$1000$1500 EKE-24U FB Upgrade Kit withorder$ 500 RBV-4$1595$1995$ 500 EKE-24C isa forward Only throttle uses ito 24 cells size 1x3x75 EKE-7R isa full forward half reverse handles 4107 cells size 1X45X75 EKE-7RM mini version 01 7R size 14X27x6 EKE-24U micro version 01 EKE-24C smaller existing micros EKE-FR full forward full reverse handles 4 7 cells size 14x2x6 EKE-FB full forward brake handles 4 14 cells size 14x2x6 speed controls tully proportional both directions RBV-4 board receiver volt meter uses 10 leds three colors non-warranty repairs normally $1500 repair fee Please send $200 postage handling per order Also send SASE information assembled speed controls carry full 90 day warranty Enclosures heat sinks also available Mail ELDENOKEN ELECTRONICS INC PO Box 1853 Arvada Colorado 80001 today 303 431-1328 Vi Mutucard acceptad ris 4 thumbing through old model maga zines recently came across following Air Trails November 1943 Allison engine has 720 parts compared 2300 Merlin Isnt mind-boggling RC Giant Scale/de Vries Continued page 49 well retracts worked bird very stable Making pass down club field run way heard sharp crack ominous sound unbalanced engine Curtiss wouldnt answer controls assumed 150 nose-down attitude nothing Bob could watch Giant P-40 powder itself Post-mortems deter mined part multibladed flight prop given way resulting major vibration rendered servos powerless offending blade parted well outboard propeller hub lest conclude glue joint failed Brian OMearas propeller problems bit different cowl Thunderbolt came adrift slipped forward prop Pieces seen leaving model turned out hunks razor-backed Jugs windshield canopy surmised sliced off propeller fragments Skillful pilot OMeara did have some control over bird wasnt totally destroyed crash sound engine made indicated least part propeller still attached drive shaft both instances however results similar pair Giant Scale models de stroyed disintegrating propellers moral check props cowlings before flight Its cheap insurance have replace 10-buck prop Its less ex pensive check replace overstressed ag ing cowling mounting pads bolts Gosma have skip next months colnnm cause annual coverage Nats See again December issue advances setting first switch close activates motorbattery circuit some on-purpose resistance series lhis fractional-ohm resistor loosely wound coil nichrome wire seen photos happens motor gets soft start because smail additional resis tance limits otherwise very large current surge Shortly after closure second microswitch closes servo motion continues effectively bypasses resistor thus applying full battery voltage motor Similarly two switches open reverse der during shutdown now resistor con nected series braking switch contacts stop-current surge comparably minimized two-switch action happens quickiy transmitters throttle stick ad vanced retarded Im sure results Join Ole nAL ~~0 IMAA 1ff "nC/ ggO Far Membership Information ---Contact Robert A. Blaney o Secretary IMAA 14 Parkview Road Long Valley NJ USA 07953 -4 154 Model Aviation L OPS 18 xi engine quarter scale Contact us free engine test results 5~sPwPIeof CoI%*eta% 9m64 9uec $75-$l0Owhich good O&RRC Electrics/Kopski Continued page 51 r RIC WONDER JUICE NOW IN 2 FLA VORS W4Y% JOURNAL OF JOuRnAL Oi THE AIRPLANE 1920 1940TIlE EARLY AEROPLANE Leo Opdycke Editor Kenn Rust Editor WW1 AERO 1900-1919 SKYWAYS 19201940 two Journals contain information current projects orical research news museums airshows shop notes technical drawings data information paint color photographs aeroplanes engines parts sale scale modelling material PLUS wants disposals news current publications kinds PLUS more. Sample copies $4 Published WORLD WAR 1 e~*pted INC 15 Crescent Road Poughkecpsie NY 12601 USA 914 473-3679 RYAN i EASY FLYISG SPORT SCALE 1/5 AEIIONCA L1bBtl4 IS SPAN 2 OR 4 CYCLE 60 80 ENGIS FEATUR IS MAY 87 SCALE H/C M 1/6 RYAN HI MAILPIAllE 72 IN SPAN 2OR4CYCLE6O-8OENCnJS FATR OF Tl SPISIT OF ST LOUIS 1/4 AERONCA L3 105 IS SPAN 2OR4CYCLE90-15ENGINES USAAF WII C5SHOPPERt 1/4 DRUflE TURBULENT 65 IS 2 OR 4 CYCLE 60 80 CflES Tl MORT FAMOUS OF HOUILTS ROLLS PIAN SF15 SHPflIG Tfl & n&au $2500 - NYS ADD TAX Lnaitl.[ASS CflS NE~ FOR AERONCA L16B & L3--FR0M FISERGIASS MASTER AERO PlANS N PARTS PO BOX 939 N NY 14760 1 7I 372 UAtITY IANS HISTORIC AIRCRAFr greatly lessened abuse switch contacts John kind guy likes things very well has just what stop-current surge men tioned above realize some may permanent-magnet motor like ones use Electrics will rotated some external means develop voltage its terminals other words acts generator motors normally just thatmotors means apply voltage run suddeniy remove applied voltage turn off switch motors tend continue rotating generate voltage same voltage value exists just after opening switch applied switch closed because rotational inertia keeps armature spinning Braking motor makes use character istic applying short circuit very small re sistance motor terminals immediately after switching off battery voltage puts electrical load now free-spinning motorturned-generator causes rapidly slow down stop other words load gen erator since no external mechanical drive keep turning stops Now happens kinetic energy associ ated spinning armature moment power switch opena can rather large energy has go somewhere brake appliedand does takes form large current subsequently large power dissi pation flowing through armature windings wiring external resistor switch con tacts etc course action oniy lasts short time armature rapidly slows stops Thus normally closed motor con trol switch contacts close brake spinning mo tor may very well experience about same surge current normaily open contacts close start motor first place YeahI know Just read agaln couple times will make sense Now please dont anyone write ask can recharge motor battery using freewheel ing prop during glide time generate needed power answer will No reason answer attempting charge battery such little windmill gross mismatch task tool Its sorta like trying drive railroad spike tack hammer effect prop-cum-generator would have deliver several amps whatever battery voltage translates wattsand just isnt enough wind little mill job get real feeling try spinning prop rapidly finger brake Now imagine slipstream around gliding plane trying substan tial task charging battery OK Charger connections auto battery can particularly testy some newer car bat teries having side-mounted connections seems ever since configuration introduced cars people have nothing trouble con necting using battery jumper cables emergency jump-starting Personally Id have fired klutz came up idea first place Nevertheless sad dled inconvenienceespecially Electric modeler depends car battery source fuel charger Enter now famillar name Fred Spor tique Ewing discovery adaptors de signed fit inconvenient side-mounted battery terminals Freddy found accessories local auto parts chain store installed could easily clip 156 Model Aviation COVERITE 420 Babylon Rd Horsham PA 19044 NEW FORMULA FOR FILM chargers leads photo shows such adaptor turns out kind adaptor market descriptive name used part side-terminal charging clamp suggest shop around auto parts stores see what suitable use car word caution however Ive noticed often side-mounted terminals lo cated such make access rather difficult cramped quarters Please VERY CAREFUL inadvertently short hot battery terminal auto metalwork working Most cars have negative ground hot pos itive line short youll really get demonstration much energy lurking fully charged auto battery Gas flying friends often subject some fun-poking Electric activity lo cal field steadily increases fact occasions exceeds wet power stuff flight line Most Electric fliers pretty friendly folks Gas guys arent times seems some justification must rendered noise goes along wet systems seems reason allow Gas guys around exhaust keeps mosquitoes down Now Im thoroughly con vinced must SOME reason Gas right Right Right me guys Just case may wondering too flew wet yearslike 25 RC flew EF Gas no muf flers before now Ive reached point life noise times really does bother flight line Personally can under stand neighborhoods may feel about lit tle airplanes buzzing around Now realize Electric Rubber HLG Towline whatever everyone has anyone Out ever heard field being lost due quiet Think about Id feel whole lot better about future modeldom mufflers worked whole lot better What has set off topic just retired 10-year-old lawn mower new came genuinely welcome surprise Its MUCH quieter can done model engines Unnecessary loss flying fields no help hobby large may facing real possibility might well consider very viable alternative Elec tric affords No longer can say Electric isnt good enough DO NOT let anyone convince Granted may preference does flying fall list things dont like Recognizing fellow Gas-flying hobbyists likely reading column Ill leave Electric fliers share thoughts above new Sanyo extra cells mentioned long ago December 87 column have fi nally found way hobby Ive read several reports application now have some 1700-mAli cells size weight 1 200s have yet chance try em out can say ever preliminary reports have seen seem suggest cells best suited applications involving very-highest currents rather full value best re alized low-current applications Ill have info future So ends first column sixth year Please forward comment question YALE HOBBY MFGU CO INC YALE REPLACEMENT MAIN SHAFTS YALE FLYBARS GMP Kalt Schluter Miniature Aircraft helicopters YALE CANOPtES orm Plastic White 3elcoat Finish Fiberglass Replacements GMP Kalt Schkiter end Miniature Aircraft helicopters HEAT SHRINK COVERING Men Tail blades Available black white red blue yellow Yaleweight Kit Two Pound Yaleweight Kit Mixing Arms Cobra/Competitor Training Gear -28 Size Helicopter Training Gear -40/60 size Helicopter Reinforcement Brackets Quilted Blade Covers YALE ACCESSORIES Allen Driver -3 mm Allen Driver -25mm Allen Driver -2 mm Allen briver 15 mm Flyber Weights Starter Extension Quilted Blade Covers Slide Stays available hellcopters guaranteed ROUND OFF IfThU4PIN does return 250 forPREWEIGHTED return shipment break4yArMAIN BLADES tip please send *500 Features Yaleweight installed returnholders attached white heatahrink included Modeler must cover balance TRU-SPIN CUSTOM-BUILT BLADES Features Weighted heat shrink color covering choice balanced ready bolt Heat Shrink colors white black red blue yellow Allow week delivery time Orders must prepaid paid credit card * Standard Tru-Spin Main Tail blades come white heat shrink covering Add *300 slot blades Yaleweight * Tru-Spin Rotor Blades superior quality lower prices Replacement blades available GMP Schiuter Kait Miniature Aircraft helicopters * Our blades come money-beck guarantee replacement item against manufacturing defects Send Price List INSTANT SHIPMENT HOT LINE 407 4668883 Shipping/COD charges extra MasterCard VISA accepted No COD orders shipped outside USA Custom-built blades special orders must prepaid paid credit card certified check Dealer Inquiries Invited Yale product dIstributors Ace R/C Inc Greet Planes Model DIet Horizon Model Distributors ABC Imports eels UK Distributor WQBY MANUFACTURING CO INC 3696 Selvltz Rd Ft PIerce FlorIda 341 40734669983 tntgpOCIsuso1 ttM Out t4~9 6 gqiOO9O o 3tf 0 #October 1988 157 PS Im SIXTEENTh year flying Elec tric have nagging question grows continuously scope Electric grows matur ity What Earth air OHFIVE Doesnt sound like something ET would say Really folks Getting rid such nonsensical nomenclature LONG LONG overdue alternatives Please see column April 1987 issue MA RC Pylon Racing/Hager Continued page 54 registration given two cards numbered contestant number both with b cards placed under respective model contestant judges viewed aircraft getting no closer standing over rated no 30 seconds took less time Periodically judges would caucus add scores average nearest Ao-point have change might recommend would disregarding high low score averaging remaining four scores thereby eliminating controversy about judging own aircraft procedure went very well quick minimum gripes Try sometime procedure went very well quick minimum gripes Try sometime may like race Dave Shadel started off zero Round 1 result aileron servo failure detected before flew Now theres good plug checking controls before flight great air racers set personal best times including yours truly round two 10924 time turned Out Fast Time day end Saturdays fly ing two people perfect scores Larry Laulom Gary Hover Close behind ever group three point down several wbo two points down Sunday started off Round 6 Times wereagain extremely fast several 1 lOs llls being posted Round 7 Bob Smith set new fast time contest 10908 Round 8 saw little change final results Following years race once again annual Calcutta pitting 13 fastest pilots against other treated two fi nal rounds since everyone double-cut firstexcept Lee VonderHey planted borrowed racer around turn three finalfinal round saw Bob Smith Dave Shadel wingslapping other allowing eventual win ner Bob Dible scoot home flag Bob Dible bought Bob Smith way $70 very interesting Thanks great planning CD Jim Sneed key workers like starter Wayne Scuri event went extremely well Looking forward next year race results listed points/best time 1 Gary Hover 32/1 0924flyofO 2 Larry Laulom 32/1 1089flyoft 3 Mike Hen sel 30/111 61flyoff 4 Ron Mendel 30/ 11809flyoff 5 Gary Long 28/11588 flyoft 6 Ed Hotelling 28/114 12flyoff 7 Dave Shadel 27/11067 8 Lyle Larson 27/ 11159 9 Scott Manning 27/11291 10 Mark Lattimore 27/11711 11 Chuck Brown 27/12332 12 Bob Smith 26/10908fast time Best finish went Lyle Larson Calcutta winner Bob Dible received $67250 winners share Send stuff like contest reports helpful hints pho tos ideas Ill best get print Model Aviation Please note Ive got new address RC Helicopters/Jolly Continued page 55 cured fuselage shell places possible along its length next step mark position Hirobos tail rotor clamp resultant tail ro tor center Secure tail tube inside fuselage cut tube appropriate length usually use several formers help secure tube Now fabricate stub shaft-guide tube will reach between front end drive tube mounted fuselage through plywood wood blocks terminate just behind drive shaft coupler tail-drive gear have approximate length solder -in length %2-in tube over joinlng end stub tube can coupled drive tube makes easy removal mechan ics Now comes tricky part now have figure approximate length speedom eter cable have found best tool cutting Stainless Steel #11 Blades L-u Carbon Steel -$895 per 100 Stainless $1485 per 100 Delivered Check MO Visa MC Satisfaction Guaranteed Berkeley Trading Co PO Box 26 Berkeley Springs WV 25411 304 258-2773 A monthly publication covering international PC Soaring Scene US Sl7yr 24/yr lstClassJ In Canada/Mexico $22/yr US funds Asia & Pacific $28/yr US funds Europeand UK $28/yr USfunds Surface Mall Foreign S 18/yr US funds RC SOARING DIGEST PO Box 1079 Poyson AZ 85547 old timer perfectly proportioned modeung Curtiss Robin 049 EngIne -Channel A/C 41 Wingapan Eleotlic Power Optional 503 Very few lull scale eicaft ideally suited model flight appealing old curtiss Robin hors spruce linen age beautifully proporhosed fo ubbe electrIc glow engines Easy end fun build trainerlihe performance Flyline Models catalog flOe P0005 l03 273-0603 FLYLINE MODELS INC 7 PO Boa 2136 Fairfax Virginia 22031 USA 158 Model Aviation SASE please author address given very top column