All about Electrics

uhF 1111111 Part mans present fleet Electrics includes Radio Control Free Flightwith subdivisions Soaring Scale Aerobatics Old-Timers everyday sport flying authors earlier Electrics now owned flown others Keystone AC Club AEROMODELING wondrous hobby sport Take look through pages magazine consider large variety specialized modeling interests Too often lose sight forms model building flying can take Free Flight Radio Control Control Line indoor outdoor flying rubber power CO-2 gas en gines hand launching towline dura tion aerobatics Scale Helicopters Com bat Old-Timers Pylon Racing on varieties combinations make up wonderful matrix modeling fun Some specialities have around long timeHand-Launched Glider Free Flight Gas instance Others relatively new RC Helicopters Giant Scale Some model power sources well-established like rubber gas newest model power source electric difficult say old electric Im sure some unknown pioneering modeler dabbling power source long ago practical pur poses however think its reasonably safe say electric power US about decade old because early Seventies Boucher brothers offered workable production electric power systems modeling use about same time fantastic toy Mattel Super Star marketed electricpowered wonder could flown either Free Flight tether incredible performer did use tether found out convinced no question mind electric-powered model aircraft impres sive capability now capability popularity will grow come significant part modeling fu ture some electric power may become future all-too-familiar loss fields due noise continues others electric power can source renewed fun exciting complement alterna tive present interests have seen people get hobby first time because electric power other end scale some older folks have long retired hobby now tracted back ease convenience Electrics Now know electric power has around awhile its viable capable model power source its fun part hobby whats stopping giving try its what Electrics please continue reading series intended introduce basics electric-powered flight will sume reader has either no prior Electric experience worse disap pointing specific goal help assure interested trying Electrics will enjoy immediate success examples applications dis cussed will based electric-powered RC aircraft information applicable both Free Flight Control Line As appears now will probably several-part series culminating construc tion project RC model presented will multi-purpose design can built sport stunt soaring capa ble utilizing wide variety motor battery combinations design known SpectraSport Stunt Soar proven has flown members Keystone RC Club Hatfield PA host club annual Electric Fly will policy writer pre sent experience-guided information techniques As writing am begin ning eleventh year electric-powered flying have shared years numerous local Electric fliers As 76 Model Aviation An original Aerobatics design named Euphoria II Motor Astro 10 12 12 Ah cells overworked swinging 8-6 nylon prop Replacement motor brushes required 75 flights Flexible nylon props RC-actuated prop stops stop prop horizontal position recommended motor shafts bend easily stiff props hit ground design uses flaperons full-span over 20% wing chord Right Prop-stop visible close-up Other controls flaperons elevator motor on-oft Has semi-symmetrical airfoil weighs 60 oz Nothing local field can out-roll Avoid spinners author says let motor have ample cooling air wide range power systems including battery packs motor mounts wiring harnesses Motors range tiny VL-101 black prop titan Keller 50/24 black rings latter capable over rop drive can direct geared Right Whisper V design has 82-in wing direct-drive Astro 15 system 8-in prop retractable prop stop 58 oz planes climb aggresive Left Fun-Scale J-3 Cub real crowd pleaser Has 72-in span weighs 4 lb 6 oz belt-drive reducer Astro 15 turning 12-8 wood prop Electronic throttle gives fully-variable motor speed control Cub can loops 31/2-in balloon wheels tail wheel steering does realistic taxiing takeoffs touch-and-goes Right Spectra complete series wings L-R Stunt Sport Soar Interchangeable motors shown L-R Mabuchi RS-5505-6530 Astro 05 Leisure LT-50 Astro 075XL Plane can accommodate motor packs six eiqht cells result have access huge Electric expe rience can share great deal what what Like other parts modeling hobby electric power experiencing dra matic changes progress variety capability available products As result despite extensive experience regard simply am able often difficult impossible have first- buy try everything Further hand familiarity everything be- series will attempt function comes available Thus possible product review particular product interest some reader may new out ordinary Characteristics ot electric power Lets get cannot offer specific comment Please bear started considering some properties September 1983 77 Left Replica Buzzard Bombshell uncovered point will use 02 power lightweight three-channel radio replica So Long FF powered VL-1O1 motor Natch FF has dethermalizer name/address wing Right Another Electric Free Flightthis Strato Streak Old-Timer Astro 02 power weighs 61/4 OZ four 100 mAh cells Just light DT fuse flip switch prop launch First 1978 SAM Champs characteristics electric-powered flightthe advantages disadvantages power formwhat electric power is minus side Electric will never work have I Nobody flies around have scientist electrician make work Great gushing downdraft Fear unfamiliarwhat tragic way get started series will tear pieces New uncommon yes difficult no Anyone can build plane put radio can make Electrics work Once upon time just six years ago club called KRC oddball loner flying Electrics Now same group has about 13 active Electric fliers Two no prior RC experience 2 Electric too heavy Itll never fly True Electric heavy comparative sense false Electric can fly extremely well indeed typical 05-sized electric motor battery wiring weighs about 16-18 oz comparable glow engine tank muffler etc may weigh 4-5 oz An appropriate-sized sport plane radio may weigh additional 18-20 oz clear glow version weighs bit half Electric What re duces Electric too heavy fly glow job lighter could fly better depending what means pilot series will suggest ways keep weight minimum 3 Electric doesnt have enough power what OK admit have seen electric 05 keep up well-tuned Tee Dee 049 drinking 40% nitro Also admit personally have yet seen electric-powered model climb nearly verti cally out sight though Im told can done Its also often very difficult Electric model aircraft taxi ground handle well grass field need kind performance may find Electrics inadequate have seen Electric Free Flights max out time after time have seen electric-motor-boosted Sailplanes fly nearly even-up conventional Sailplanes latter half wing loading sky up sky up sky down sky down have seen electricpowered aerobatics planes consecutive inside outside loops vertical eights spins knife-edge flight snaps continuous rolls etc have seen Electrics win half events typically gasdominated club fun fly Mostly what Ive seen Electrics providing people hours sport-flying fun Thats spelled F-U-N 4 Electrics have too short flight will have great deal say about later issue has caused confusion disappointment other Electricrelated flight parameter blame some over-enthusiastic advertising has proven far damaging helpful Electric cause As extreme example insufficient power duration have seen some ARF Electrics flight time close zeroshort sustained level flight followed powered sink Thats genuine plastic proof Electric no good other hand have several thou sand good Electric flights yes OOOs logged over past several years wide variety aircraft types logged mean specific written records plane date flight time etc Some flying ARFs fly Based rather extensive data can generally tell what expect given setup plan use information great detail later series Left decade old now discontinued Mattel Super Star spectacular FF Electric performer two 100 mAh cells gear drive 7-in prop Ship weighs 51/2 ox puts out over 2 oz static thrust should have dethermalizer Kopaki says Performance convinced him Electrics potential Right Aerobatic Persuader model has 36-in wing NACA 2410 section Flying weight 33 oz Astro 05 Cobalt 7-6 nylon prop six 12 Ah cells Three-channel controls elevator aileron motor on-off Readily does consecutive outside loops Note stopwatch transmitter flight timed recorded Keep tuned series Bob Kopski will discussing hows whys Electrics 78 Model Aviation meantime offer following 28th year RC Five years ago sold gas stuff because found flying Electrics enjoying gas less Since Ive done flying ever before True can always double fuel tank size keep gas engine running longer theres no equivalent trick easily done Electrics However done right theres nothing inadequate unsatisfying about todays Electric flight times 5 Electric hard understand What I have no help Read ModelAviation will very best answer Now some advantages oppor tunities electric power offers 1 Electric challenging new kind modeling fun mentioned earlier Fun what hobby about modelers renowned taking up challenge 2 Electric power applicable over very broad range model flying categories Offhand cant think gas-powered category could have Electric equivalent Thus no matter what favor ite modeling specialty its gas-powered electric-powered version probably pos sible 3 Electric can create new categories example Sailplane enthusiasts generally purists want nothing onboard power dont blame last thing glider guiders would want glow engine stuck somewhere graceful birds times hauling winch out untangling snarled hi-start unappealing Heres clean compromise possible sleekly-cowled quietly-geared electric motor turning large fan having folding blades blend graceful fuse lage contours way go new category Nope Its called F3E Elec troflight its FAI section AMA rule book honest thought new think its un derstatement say F3E does yet have good foothold US sense new Assuming event may become World Championship challenging opportunity com petitive typesbut beyond scope series 4 Electric very convenient Often find time opportunity avail able flight two times will dark hour cleaning greasies off favorite neighbor irritator just isnt worth bother No bother Electric Just toss car charging along way nearest field fly dont need field box youre quietly recharging can talk very loud voice over flight line roar buddies Now take another flight pack everyone Continued page 80 PEPPERMINT PATTIE-60 Degedb Wa N Om k 1164F BRED ASS FUSE AGE w firewall taIlAeSf& wing fillets FLITEGLAS MODELSSee deale 0 Order direct WINGASTABILIZER FOAM C ply Sling AILERONS ELEVATOR B RU rough Sanded ShapeMASTER KIT BASIC HARDWARE hingeS aileron connectorS SloOlO BAR/RICH SALES CO 2 FAIRWAY lofAun rods CISSiSeS thtnaded fodSHANNIBAL MO O340f 314 22f-8803 WINGSPAN-BB AREABSS Sgifl ENGINE- BO WEIGHT 7510 AlES FLY THE BEST September 1983 79 N FULL LINE METAL SPECIALISTS J-5s DEEP SEA CRUISER Great sport boat just fun boating J-5s DEEP SEA CRUISER tos running 1 2 foot Speeds up 25-30 mph 7 48 LOA x 181/2 beam x 11 deep Easy build mahogany plywood soft wood construction Designed ~or hobby Ouadra TML 35 gasoline engine Kit includes fulisize plan instructions FULL-SIZE PLANS NOW PRODUCED IN THE US Mciic Inociporated 322 So Gallatin Rd son TN 371 615 8686811 Mon thin Sat gm 500 pm ATTENTION QUARTER & GIANT SCALE MQDELERS LLiT-SAP need iti LLiT-SAP multiple wvo LONG LEAD INTERFERENCE TRAP & SERVO ALTERNATE POWER adap tar Specify radio ordering $2995 postage paid send large SSAE for ilterature eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK SIZES else tearing up paper towels swabbing gobs icky goo off drippy gassers last drop usually will fall living room rug 5 Electric quiet Theres no argument Its very sad true modeling groups finding harder harder keep fields several rea sons often its because noise People dont like noise often choose make neighborhood cause-celebre Electric can savior regard have interesting personal experience Prior mid-1960s no club used mufflers day casual complaint harsh words petition etc etc Fortunately saved field adopting mandatory muffler rule backed up sound level meter etc After extended period flying mufflers occasion visit another field mufflers used personally found higher noise level very irritating become accustomed muffled engines recently Electrics field part day gas job brought out find lost peace noise very discomforting know number dedicated Sailplane enthusiasts similar stories tell What Im saying no way wish deny fellow fliers pleasure can relate effects implications noise person 6 Electric makes better model builder As described above electricpower installation heavier com parable glow have learned ways build stronger lighter structures help accommodate extra ounces 1 will dis cuss continue series Some ideas may help make better gas jobs 7 Electric makes better model flier Since relatively speaking realities higher weight lower power Electrics cannot always horse' plane off ground through maneuver have flying less guiding power plant wing wonderful thing have gotten never knew really fly because its easy fix everything throttle Ive seen good experi enced pilots first Electricpulling back hard elevator stick have plane tumble ground What got simple stall familiar power reserve pull through take same plane ease little up Presto wing does its thing lift plane goes up smoothly steadily 8 Electrics can open up new flying fields point goes beyond earlier discussion keeping have Ive personal experience lunchtime flying property employer Other some lunchtime strollers no knew did attract signi ficant attention because no heard flying So much nooners Continued page 167 80 Model Aviation KIT & DRIVE TRAIN $14950 3-5 ENTRPRISUS KIT DRIVE TRAIN & ENGiNE $26950 258 Schuman Dr Newmarket Alabama 35781 Phone 1-205-e522586 PO Des C2 Belmont Ontario NOt 180 Phone 1519-644-0375 S 1795 REPAIR SERVICE FOR HOBBY LOBBY EK LOGiCTROL FUTABA T HOBBY SHACK ROYAL LINE SALESI RADIO SYSTEMS FUTABA ROYAL ACCESSORIES FOR MOST RADIOSI QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE I OR CUSTOM 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG contact use positive-point contact engaged first thumb tilted back touch rear head engine making contact eliminates need use two fingers starting either Slow Rat Scale Race engines twofinger approach seems work better Rat Racers prevent inadvertent grounding out male plug merely pulled slot switch can turned off required knee support band used hold battery firmly arm people also using long length elastic bandage wrapped around tied securely however knee leg-support bandage seems preferred item addition will note leg-support bandage slipped un derneath voltage regulator holds little white arm correct voltage posi tion whatever type plug being used engine As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Electrics/Kopski Continued page 80 9 You can run motor house midnight probably survive incident long enough again again big help getting new ship ready Saturday Sunday morning flying session 10 Electric absolutely clean Consider flying flO-powered Pattern ship new suit note feelings Now men tally convert picture Electric same suit See No problem Electrons Continued page 168 Winning kleas FOURMOST RETRACTABLE OW HOOK RELEASE Price Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight THER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Geples Hinges Gaplm Hinge Slotter Strut Fairinp Cockpit Coammg nd SASE Complete Information FURST 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 * *SAILPLANE**PAW DIESELS hi-starts/winches/accessoriesEnglands Finest complete line/best prices/top quality049 29 New low low prices envelope catalog/information toSend $100 list RLF PRODUCTSEric Clutton 3816 DeSoto Ave R3 Box 178-Y PeoIijN 47464 IZLIFort Myers Florida 33905 product review product review product review rhis item precision tool designed dispense arefully-confrolled amounts low-viscosity fluids uch oils solvents anerobics Cyanoacrylate adhesives molded high-density polyethylene Ind features replaceable tip Refillable has apacity 6cc will dispense either metered dots r thin lines its contents also provides stable forage moisture-sensitive materials Look lobby craft dealers roduct review product review product review 4 Harold models cire exttiortFnarli orrJnciry September 1983 167 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 PRICE Dispens-If pencil dispensing low-viscosity fluids i $295 Hobby Factory Inc PO Box 321 Kutztown PA 19530 Advanced design features never before seen R/C Helicopter Tnple ball bearings main tail rotorhubsLight weight metal construction AutorotationLow cost parts Controls designed inverted flightA11 versions fully aerobatic AMA/FAI patterns Oual ball bearing tail pitch controlSpiral hypoid gears main tail drives EASTERN US HELICENTER EAST 412/342-5500 ozone dont leave stains 11 Multi-motor aircraft very easy Electrics because electric motors usually well-matched performance charac teristics powered same bat tery several motors will run run down same rate No chance losing side really great Scale Some local fliers have several twins quads operational 12 Electric motors can fully con trolled flight can done onoff fashion power steps in-between fully-variable speed control zero maximum Try gas 13 Electric power virtually vibrationfree often allows simple radio stallation less foam packing shock mounting needed stallations nearly rigid receivers servos etc squeezed tightly go along 14 Electric simply perfect Wrong Like everything else life Electrics have both limitations capability require ments proper handling Example just conscientious modeler should careful allow gas engine overheat also should such modeler pay close atten tion battery heat series will attempt thorough honest realistic include everything didnt know needed know about Electrics realize some writing above makes redundant points purpose fill pages same words rather express range thoughts sev eral ways give reader variety viewpoint perspective next installment series will get electric power systemsmotors batteries some other Electric goodies Later well get installations suitable planes Till just ponder possibilities Any questions related part series may directed SASE author Bob Kopski 25 West End Dr Lans dale PA 19446 Please resist temptation jump ahead have yet write series Im unable handle letters require books worth writing answer properly Otherwise will attempt respond expedient fashion Dove 650/Powell Continued page 88 assure sides parallel CyA-glue sq tail post side fuselage flat building board draw two paral lel lines slightly longer fuselage separated width fuselage Draw third parallel line centered exactly between first two Line up pin front part fuselage board top down exactly between lines Make sure its pinned securely rigidly Adjust pin glue sides together tail post such tail end centered exactly centerline Pin F-3 F-4 F-5 F-6 place glue CyA sizes formers shown plan nominal should cut actual sizes needed rest fuselage relatively straightforward Glue /2 ply tank compartment floor place over engine mounts install blind nut tank hold-down Drill engine mount holes install blind mounting nuts Add nose filler blocks A-in top block insert building motor spinner no cylinder mounted A2-in brass shims shown plan Tack-glue top block bottom block cowl assembly place carve fuselage shape piece cowl removed completed including tie-downs after top bottom blocks removed hollowed carved hollowed top bottom blocks should weigh about 1/4-I oz total Reinforce inside nose cowl fiberglass cloth polyester resin Fuel-proof entire engine com partment several heavy coats resin stab-elevator assembly original model constructed foam cores shown Lightening holes foam shown plan may cut reduce weight built-up assembly will work well key strength rigidity light ness center joint stab should reinforced glass cloth completed assembly should weigh 1-20 oz fin rudder assembly can made very lightweight V4 /6 sheet weight shouldnt exceed oz Assembly advise reweigh com ponent parts before assembly sure within stated tolerances particularly tail section anything too heavy build over last chance correct weight problem first step install wing fuselage Draw cross section wing root proper location fuselage sides cut out sections Next re move part fuselage sides bot tom doublers TE allow installation wing through bottom use jig align wing fuse lage follows Take piece building board about 60 inches square lay flat surface ie table floor Draw straight line down center board fuselage will centered line Determine TE wing would intersect line point draw line across board perpendicular first line TE will lined up along line Pin fuselage top-down centered fuselage line Place wing fuselage line up TE TE line Next line up centers LE TE wing line drawn fuselage Also vertical sides fuse lage must perpendicular wing Once have wing aligned fuselage three directions pin ned place tack-glue CyA Proper 168 Model Aviation O New Expandable concept RIC Helicopters Competitor will fly 45050 or60 size engines o model can take novice flying winning AMA expert class

uhF 1111111 Part mans present fleet Electrics includes Radio Control Free Flightwith subdivisions Soaring Scale Aerobatics Old-Timers everyday sport flying authors earlier Electrics now owned flown others Keystone AC Club AEROMODELING wondrous hobby sport Take look through pages magazine consider large variety specialized modeling interests Too often lose sight forms model building flying can take Free Flight Radio Control Control Line indoor outdoor flying rubber power CO-2 gas en gines hand launching towline dura tion aerobatics Scale Helicopters Com bat Old-Timers Pylon Racing on varieties combinations make up wonderful matrix modeling fun Some specialities have around long timeHand-Launched Glider Free Flight Gas instance Others relatively new RC Helicopters Giant Scale Some model power sources well-established like rubber gas newest model power source electric difficult say old electric Im sure some unknown pioneering modeler dabbling power source long ago practical pur poses however think its reasonably safe say electric power US about decade old because early Seventies Boucher brothers offered workable production electric power systems modeling use about same time fantastic toy Mattel Super Star marketed electricpowered wonder could flown either Free Flight tether incredible performer did use tether found out convinced no question mind electric-powered model aircraft impres sive capability now capability popularity will grow come significant part modeling fu ture some electric power may become future all-too-familiar loss fields due noise continues others electric power can source renewed fun exciting complement alterna tive present interests have seen people get hobby first time because electric power other end scale some older folks have long retired hobby now tracted back ease convenience Electrics Now know electric power has around awhile its viable capable model power source its fun part hobby whats stopping giving try its what Electrics please continue reading series intended introduce basics electric-powered flight will sume reader has either no prior Electric experience worse disap pointing specific goal help assure interested trying Electrics will enjoy immediate success examples applications dis cussed will based electric-powered RC aircraft information applicable both Free Flight Control Line As appears now will probably several-part series culminating construc tion project RC model presented will multi-purpose design can built sport stunt soaring capa ble utilizing wide variety motor battery combinations design known SpectraSport Stunt Soar proven has flown members Keystone RC Club Hatfield PA host club annual Electric Fly will policy writer pre sent experience-guided information techniques As writing am begin ning eleventh year electric-powered flying have shared years numerous local Electric fliers As 76 Model Aviation An original Aerobatics design named Euphoria II Motor Astro 10 12 12 Ah cells overworked swinging 8-6 nylon prop Replacement motor brushes required 75 flights Flexible nylon props RC-actuated prop stops stop prop horizontal position recommended motor shafts bend easily stiff props hit ground design uses flaperons full-span over 20% wing chord Right Prop-stop visible close-up Other controls flaperons elevator motor on-oft Has semi-symmetrical airfoil weighs 60 oz Nothing local field can out-roll Avoid spinners author says let motor have ample cooling air wide range power systems including battery packs motor mounts wiring harnesses Motors range tiny VL-101 black prop titan Keller 50/24 black rings latter capable over rop drive can direct geared Right Whisper V design has 82-in wing direct-drive Astro 15 system 8-in prop retractable prop stop 58 oz planes climb aggresive Left Fun-Scale J-3 Cub real crowd pleaser Has 72-in span weighs 4 lb 6 oz belt-drive reducer Astro 15 turning 12-8 wood prop Electronic throttle gives fully-variable motor speed control Cub can loops 31/2-in balloon wheels tail wheel steering does realistic taxiing takeoffs touch-and-goes Right Spectra complete series wings L-R Stunt Sport Soar Interchangeable motors shown L-R Mabuchi RS-5505-6530 Astro 05 Leisure LT-50 Astro 075XL Plane can accommodate motor packs six eiqht cells result have access huge Electric expe rience can share great deal what what Like other parts modeling hobby electric power experiencing dra matic changes progress variety capability available products As result despite extensive experience regard simply am able often difficult impossible have first- buy try everything Further hand familiarity everything be- series will attempt function comes available Thus possible product review particular product interest some reader may new out ordinary Characteristics ot electric power Lets get cannot offer specific comment Please bear started considering some properties September 1983 77 Left Replica Buzzard Bombshell uncovered point will use 02 power lightweight three-channel radio replica So Long FF powered VL-1O1 motor Natch FF has dethermalizer name/address wing Right Another Electric Free Flightthis Strato Streak Old-Timer Astro 02 power weighs 61/4 OZ four 100 mAh cells Just light DT fuse flip switch prop launch First 1978 SAM Champs characteristics electric-powered flightthe advantages disadvantages power formwhat electric power is minus side Electric will never work have I Nobody flies around have scientist electrician make work Great gushing downdraft Fear unfamiliarwhat tragic way get started series will tear pieces New uncommon yes difficult no Anyone can build plane put radio can make Electrics work Once upon time just six years ago club called KRC oddball loner flying Electrics Now same group has about 13 active Electric fliers Two no prior RC experience 2 Electric too heavy Itll never fly True Electric heavy comparative sense false Electric can fly extremely well indeed typical 05-sized electric motor battery wiring weighs about 16-18 oz comparable glow engine tank muffler etc may weigh 4-5 oz An appropriate-sized sport plane radio may weigh additional 18-20 oz clear glow version weighs bit half Electric What re duces Electric too heavy fly glow job lighter could fly better depending what means pilot series will suggest ways keep weight minimum 3 Electric doesnt have enough power what OK admit have seen electric 05 keep up well-tuned Tee Dee 049 drinking 40% nitro Also admit personally have yet seen electric-powered model climb nearly verti cally out sight though Im told can done Its also often very difficult Electric model aircraft taxi ground handle well grass field need kind performance may find Electrics inadequate have seen Electric Free Flights max out time after time have seen electric-motor-boosted Sailplanes fly nearly even-up conventional Sailplanes latter half wing loading sky up sky up sky down sky down have seen electricpowered aerobatics planes consecutive inside outside loops vertical eights spins knife-edge flight snaps continuous rolls etc have seen Electrics win half events typically gasdominated club fun fly Mostly what Ive seen Electrics providing people hours sport-flying fun Thats spelled F-U-N 4 Electrics have too short flight will have great deal say about later issue has caused confusion disappointment other Electricrelated flight parameter blame some over-enthusiastic advertising has proven far damaging helpful Electric cause As extreme example insufficient power duration have seen some ARF Electrics flight time close zeroshort sustained level flight followed powered sink Thats genuine plastic proof Electric no good other hand have several thou sand good Electric flights yes OOOs logged over past several years wide variety aircraft types logged mean specific written records plane date flight time etc Some flying ARFs fly Based rather extensive data can generally tell what expect given setup plan use information great detail later series Left decade old now discontinued Mattel Super Star spectacular FF Electric performer two 100 mAh cells gear drive 7-in prop Ship weighs 51/2 ox puts out over 2 oz static thrust should have dethermalizer Kopaki says Performance convinced him Electrics potential Right Aerobatic Persuader model has 36-in wing NACA 2410 section Flying weight 33 oz Astro 05 Cobalt 7-6 nylon prop six 12 Ah cells Three-channel controls elevator aileron motor on-off Readily does consecutive outside loops Note stopwatch transmitter flight timed recorded Keep tuned series Bob Kopski will discussing hows whys Electrics 78 Model Aviation meantime offer following 28th year RC Five years ago sold gas stuff because found flying Electrics enjoying gas less Since Ive done flying ever before True can always double fuel tank size keep gas engine running longer theres no equivalent trick easily done Electrics However done right theres nothing inadequate unsatisfying about todays Electric flight times 5 Electric hard understand What I have no help Read ModelAviation will very best answer Now some advantages oppor tunities electric power offers 1 Electric challenging new kind modeling fun mentioned earlier Fun what hobby about modelers renowned taking up challenge 2 Electric power applicable over very broad range model flying categories Offhand cant think gas-powered category could have Electric equivalent Thus no matter what favor ite modeling specialty its gas-powered electric-powered version probably pos sible 3 Electric can create new categories example Sailplane enthusiasts generally purists want nothing onboard power dont blame last thing glider guiders would want glow engine stuck somewhere graceful birds times hauling winch out untangling snarled hi-start unappealing Heres clean compromise possible sleekly-cowled quietly-geared electric motor turning large fan having folding blades blend graceful fuse lage contours way go new category Nope Its called F3E Elec troflight its FAI section AMA rule book honest thought new think its un derstatement say F3E does yet have good foothold US sense new Assuming event may become World Championship challenging opportunity com petitive typesbut beyond scope series 4 Electric very convenient Often find time opportunity avail able flight two times will dark hour cleaning greasies off favorite neighbor irritator just isnt worth bother No bother Electric Just toss car charging along way nearest field fly dont need field box youre quietly recharging can talk very loud voice over flight line roar buddies Now take another flight pack everyone Continued page 80 PEPPERMINT PATTIE-60 Degedb Wa N Om k 1164F BRED ASS FUSE AGE w firewall taIlAeSf& wing fillets FLITEGLAS MODELSSee deale 0 Order direct WINGASTABILIZER FOAM C ply Sling AILERONS ELEVATOR B RU rough Sanded ShapeMASTER KIT BASIC HARDWARE hingeS aileron connectorS SloOlO BAR/RICH SALES CO 2 FAIRWAY lofAun rods CISSiSeS thtnaded fodSHANNIBAL MO O340f 314 22f-8803 WINGSPAN-BB AREABSS Sgifl ENGINE- BO WEIGHT 7510 AlES FLY THE BEST September 1983 79 N FULL LINE METAL SPECIALISTS J-5s DEEP SEA CRUISER Great sport boat just fun boating J-5s DEEP SEA CRUISER tos running 1 2 foot Speeds up 25-30 mph 7 48 LOA x 181/2 beam x 11 deep Easy build mahogany plywood soft wood construction Designed ~or hobby Ouadra TML 35 gasoline engine Kit includes fulisize plan instructions FULL-SIZE PLANS NOW PRODUCED IN THE US Mciic Inociporated 322 So Gallatin Rd son TN 371 615 8686811 Mon thin Sat gm 500 pm ATTENTION QUARTER & GIANT SCALE MQDELERS LLiT-SAP need iti LLiT-SAP multiple wvo LONG LEAD INTERFERENCE TRAP & SERVO ALTERNATE POWER adap tar Specify radio ordering $2995 postage paid send large SSAE for ilterature eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK SIZES else tearing up paper towels swabbing gobs icky goo off drippy gassers last drop usually will fall living room rug 5 Electric quiet Theres no argument Its very sad true modeling groups finding harder harder keep fields several rea sons often its because noise People dont like noise often choose make neighborhood cause-celebre Electric can savior regard have interesting personal experience Prior mid-1960s no club used mufflers day casual complaint harsh words petition etc etc Fortunately saved field adopting mandatory muffler rule backed up sound level meter etc After extended period flying mufflers occasion visit another field mufflers used personally found higher noise level very irritating become accustomed muffled engines recently Electrics field part day gas job brought out find lost peace noise very discomforting know number dedicated Sailplane enthusiasts similar stories tell What Im saying no way wish deny fellow fliers pleasure can relate effects implications noise person 6 Electric makes better model builder As described above electricpower installation heavier com parable glow have learned ways build stronger lighter structures help accommodate extra ounces 1 will dis cuss continue series Some ideas may help make better gas jobs 7 Electric makes better model flier Since relatively speaking realities higher weight lower power Electrics cannot always horse' plane off ground through maneuver have flying less guiding power plant wing wonderful thing have gotten never knew really fly because its easy fix everything throttle Ive seen good experi enced pilots first Electricpulling back hard elevator stick have plane tumble ground What got simple stall familiar power reserve pull through take same plane ease little up Presto wing does its thing lift plane goes up smoothly steadily 8 Electrics can open up new flying fields point goes beyond earlier discussion keeping have Ive personal experience lunchtime flying property employer Other some lunchtime strollers no knew did attract signi ficant attention because no heard flying So much nooners Continued page 167 80 Model Aviation KIT & DRIVE TRAIN $14950 3-5 ENTRPRISUS KIT DRIVE TRAIN & ENGiNE $26950 258 Schuman Dr Newmarket Alabama 35781 Phone 1-205-e522586 PO Des C2 Belmont Ontario NOt 180 Phone 1519-644-0375 S 1795 REPAIR SERVICE FOR HOBBY LOBBY EK LOGiCTROL FUTABA T HOBBY SHACK ROYAL LINE SALESI RADIO SYSTEMS FUTABA ROYAL ACCESSORIES FOR MOST RADIOSI QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE I OR CUSTOM 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG contact use positive-point contact engaged first thumb tilted back touch rear head engine making contact eliminates need use two fingers starting either Slow Rat Scale Race engines twofinger approach seems work better Rat Racers prevent inadvertent grounding out male plug merely pulled slot switch can turned off required knee support band used hold battery firmly arm people also using long length elastic bandage wrapped around tied securely however knee leg-support bandage seems preferred item addition will note leg-support bandage slipped un derneath voltage regulator holds little white arm correct voltage posi tion whatever type plug being used engine As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Electrics/Kopski Continued page 80 9 You can run motor house midnight probably survive incident long enough again again big help getting new ship ready Saturday Sunday morning flying session 10 Electric absolutely clean Consider flying flO-powered Pattern ship new suit note feelings Now men tally convert picture Electric same suit See No problem Electrons Continued page 168 Winning kleas FOURMOST RETRACTABLE OW HOOK RELEASE Price Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight THER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Geples Hinges Gaplm Hinge Slotter Strut Fairinp Cockpit Coammg nd SASE Complete Information FURST 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 * *SAILPLANE**PAW DIESELS hi-starts/winches/accessoriesEnglands Finest complete line/best prices/top quality049 29 New low low prices envelope catalog/information toSend $100 list RLF PRODUCTSEric Clutton 3816 DeSoto Ave R3 Box 178-Y PeoIijN 47464 IZLIFort Myers Florida 33905 product review product review product review rhis item precision tool designed dispense arefully-confrolled amounts low-viscosity fluids uch oils solvents anerobics Cyanoacrylate adhesives molded high-density polyethylene Ind features replaceable tip Refillable has apacity 6cc will dispense either metered dots r thin lines its contents also provides stable forage moisture-sensitive materials Look lobby craft dealers roduct review product review product review 4 Harold models cire exttiortFnarli orrJnciry September 1983 167 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 PRICE Dispens-If pencil dispensing low-viscosity fluids i $295 Hobby Factory Inc PO Box 321 Kutztown PA 19530 Advanced design features never before seen R/C Helicopter Tnple ball bearings main tail rotorhubsLight weight metal construction AutorotationLow cost parts Controls designed inverted flightA11 versions fully aerobatic AMA/FAI patterns Oual ball bearing tail pitch controlSpiral hypoid gears main tail drives EASTERN US HELICENTER EAST 412/342-5500 ozone dont leave stains 11 Multi-motor aircraft very easy Electrics because electric motors usually well-matched performance charac teristics powered same bat tery several motors will run run down same rate No chance losing side really great Scale Some local fliers have several twins quads operational 12 Electric motors can fully con trolled flight can done onoff fashion power steps in-between fully-variable speed control zero maximum Try gas 13 Electric power virtually vibrationfree often allows simple radio stallation less foam packing shock mounting needed stallations nearly rigid receivers servos etc squeezed tightly go along 14 Electric simply perfect Wrong Like everything else life Electrics have both limitations capability require ments proper handling Example just conscientious modeler should careful allow gas engine overheat also should such modeler pay close atten tion battery heat series will attempt thorough honest realistic include everything didnt know needed know about Electrics realize some writing above makes redundant points purpose fill pages same words rather express range thoughts sev eral ways give reader variety viewpoint perspective next installment series will get electric power systemsmotors batteries some other Electric goodies Later well get installations suitable planes Till just ponder possibilities Any questions related part series may directed SASE author Bob Kopski 25 West End Dr Lans dale PA 19446 Please resist temptation jump ahead have yet write series Im unable handle letters require books worth writing answer properly Otherwise will attempt respond expedient fashion Dove 650/Powell Continued page 88 assure sides parallel CyA-glue sq tail post side fuselage flat building board draw two paral lel lines slightly longer fuselage separated width fuselage Draw third parallel line centered exactly between first two Line up pin front part fuselage board top down exactly between lines Make sure its pinned securely rigidly Adjust pin glue sides together tail post such tail end centered exactly centerline Pin F-3 F-4 F-5 F-6 place glue CyA sizes formers shown plan nominal should cut actual sizes needed rest fuselage relatively straightforward Glue /2 ply tank compartment floor place over engine mounts install blind nut tank hold-down Drill engine mount holes install blind mounting nuts Add nose filler blocks A-in top block insert building motor spinner no cylinder mounted A2-in brass shims shown plan Tack-glue top block bottom block cowl assembly place carve fuselage shape piece cowl removed completed including tie-downs after top bottom blocks removed hollowed carved hollowed top bottom blocks should weigh about 1/4-I oz total Reinforce inside nose cowl fiberglass cloth polyester resin Fuel-proof entire engine com partment several heavy coats resin stab-elevator assembly original model constructed foam cores shown Lightening holes foam shown plan may cut reduce weight built-up assembly will work well key strength rigidity light ness center joint stab should reinforced glass cloth completed assembly should weigh 1-20 oz fin rudder assembly can made very lightweight V4 /6 sheet weight shouldnt exceed oz Assembly advise reweigh com ponent parts before assembly sure within stated tolerances particularly tail section anything too heavy build over last chance correct weight problem first step install wing fuselage Draw cross section wing root proper location fuselage sides cut out sections Next re move part fuselage sides bot tom doublers TE allow installation wing through bottom use jig align wing fuse lage follows Take piece building board about 60 inches square lay flat surface ie table floor Draw straight line down center board fuselage will centered line Determine TE wing would intersect line point draw line across board perpendicular first line TE will lined up along line Pin fuselage top-down centered fuselage line Place wing fuselage line up TE TE line Next line up centers LE TE wing line drawn fuselage Also vertical sides fuse lage must perpendicular wing Once have wing aligned fuselage three directions pin ned place tack-glue CyA Proper 168 Model Aviation O New Expandable concept RIC Helicopters Competitor will fly 45050 or60 size engines o model can take novice flying winning AMA expert class

uhF 1111111 Part mans present fleet Electrics includes Radio Control Free Flightwith subdivisions Soaring Scale Aerobatics Old-Timers everyday sport flying authors earlier Electrics now owned flown others Keystone AC Club AEROMODELING wondrous hobby sport Take look through pages magazine consider large variety specialized modeling interests Too often lose sight forms model building flying can take Free Flight Radio Control Control Line indoor outdoor flying rubber power CO-2 gas en gines hand launching towline dura tion aerobatics Scale Helicopters Com bat Old-Timers Pylon Racing on varieties combinations make up wonderful matrix modeling fun Some specialities have around long timeHand-Launched Glider Free Flight Gas instance Others relatively new RC Helicopters Giant Scale Some model power sources well-established like rubber gas newest model power source electric difficult say old electric Im sure some unknown pioneering modeler dabbling power source long ago practical pur poses however think its reasonably safe say electric power US about decade old because early Seventies Boucher brothers offered workable production electric power systems modeling use about same time fantastic toy Mattel Super Star marketed electricpowered wonder could flown either Free Flight tether incredible performer did use tether found out convinced no question mind electric-powered model aircraft impres sive capability now capability popularity will grow come significant part modeling fu ture some electric power may become future all-too-familiar loss fields due noise continues others electric power can source renewed fun exciting complement alterna tive present interests have seen people get hobby first time because electric power other end scale some older folks have long retired hobby now tracted back ease convenience Electrics Now know electric power has around awhile its viable capable model power source its fun part hobby whats stopping giving try its what Electrics please continue reading series intended introduce basics electric-powered flight will sume reader has either no prior Electric experience worse disap pointing specific goal help assure interested trying Electrics will enjoy immediate success examples applications dis cussed will based electric-powered RC aircraft information applicable both Free Flight Control Line As appears now will probably several-part series culminating construc tion project RC model presented will multi-purpose design can built sport stunt soaring capa ble utilizing wide variety motor battery combinations design known SpectraSport Stunt Soar proven has flown members Keystone RC Club Hatfield PA host club annual Electric Fly will policy writer pre sent experience-guided information techniques As writing am begin ning eleventh year electric-powered flying have shared years numerous local Electric fliers As 76 Model Aviation An original Aerobatics design named Euphoria II Motor Astro 10 12 12 Ah cells overworked swinging 8-6 nylon prop Replacement motor brushes required 75 flights Flexible nylon props RC-actuated prop stops stop prop horizontal position recommended motor shafts bend easily stiff props hit ground design uses flaperons full-span over 20% wing chord Right Prop-stop visible close-up Other controls flaperons elevator motor on-oft Has semi-symmetrical airfoil weighs 60 oz Nothing local field can out-roll Avoid spinners author says let motor have ample cooling air wide range power systems including battery packs motor mounts wiring harnesses Motors range tiny VL-101 black prop titan Keller 50/24 black rings latter capable over rop drive can direct geared Right Whisper V design has 82-in wing direct-drive Astro 15 system 8-in prop retractable prop stop 58 oz planes climb aggresive Left Fun-Scale J-3 Cub real crowd pleaser Has 72-in span weighs 4 lb 6 oz belt-drive reducer Astro 15 turning 12-8 wood prop Electronic throttle gives fully-variable motor speed control Cub can loops 31/2-in balloon wheels tail wheel steering does realistic taxiing takeoffs touch-and-goes Right Spectra complete series wings L-R Stunt Sport Soar Interchangeable motors shown L-R Mabuchi RS-5505-6530 Astro 05 Leisure LT-50 Astro 075XL Plane can accommodate motor packs six eiqht cells result have access huge Electric expe rience can share great deal what what Like other parts modeling hobby electric power experiencing dra matic changes progress variety capability available products As result despite extensive experience regard simply am able often difficult impossible have first- buy try everything Further hand familiarity everything be- series will attempt function comes available Thus possible product review particular product interest some reader may new out ordinary Characteristics ot electric power Lets get cannot offer specific comment Please bear started considering some properties September 1983 77 Left Replica Buzzard Bombshell uncovered point will use 02 power lightweight three-channel radio replica So Long FF powered VL-1O1 motor Natch FF has dethermalizer name/address wing Right Another Electric Free Flightthis Strato Streak Old-Timer Astro 02 power weighs 61/4 OZ four 100 mAh cells Just light DT fuse flip switch prop launch First 1978 SAM Champs characteristics electric-powered flightthe advantages disadvantages power formwhat electric power is minus side Electric will never work have I Nobody flies around have scientist electrician make work Great gushing downdraft Fear unfamiliarwhat tragic way get started series will tear pieces New uncommon yes difficult no Anyone can build plane put radio can make Electrics work Once upon time just six years ago club called KRC oddball loner flying Electrics Now same group has about 13 active Electric fliers Two no prior RC experience 2 Electric too heavy Itll never fly True Electric heavy comparative sense false Electric can fly extremely well indeed typical 05-sized electric motor battery wiring weighs about 16-18 oz comparable glow engine tank muffler etc may weigh 4-5 oz An appropriate-sized sport plane radio may weigh additional 18-20 oz clear glow version weighs bit half Electric What re duces Electric too heavy fly glow job lighter could fly better depending what means pilot series will suggest ways keep weight minimum 3 Electric doesnt have enough power what OK admit have seen electric 05 keep up well-tuned Tee Dee 049 drinking 40% nitro Also admit personally have yet seen electric-powered model climb nearly verti cally out sight though Im told can done Its also often very difficult Electric model aircraft taxi ground handle well grass field need kind performance may find Electrics inadequate have seen Electric Free Flights max out time after time have seen electric-motor-boosted Sailplanes fly nearly even-up conventional Sailplanes latter half wing loading sky up sky up sky down sky down have seen electricpowered aerobatics planes consecutive inside outside loops vertical eights spins knife-edge flight snaps continuous rolls etc have seen Electrics win half events typically gasdominated club fun fly Mostly what Ive seen Electrics providing people hours sport-flying fun Thats spelled F-U-N 4 Electrics have too short flight will have great deal say about later issue has caused confusion disappointment other Electricrelated flight parameter blame some over-enthusiastic advertising has proven far damaging helpful Electric cause As extreme example insufficient power duration have seen some ARF Electrics flight time close zeroshort sustained level flight followed powered sink Thats genuine plastic proof Electric no good other hand have several thou sand good Electric flights yes OOOs logged over past several years wide variety aircraft types logged mean specific written records plane date flight time etc Some flying ARFs fly Based rather extensive data can generally tell what expect given setup plan use information great detail later series Left decade old now discontinued Mattel Super Star spectacular FF Electric performer two 100 mAh cells gear drive 7-in prop Ship weighs 51/2 ox puts out over 2 oz static thrust should have dethermalizer Kopaki says Performance convinced him Electrics potential Right Aerobatic Persuader model has 36-in wing NACA 2410 section Flying weight 33 oz Astro 05 Cobalt 7-6 nylon prop six 12 Ah cells Three-channel controls elevator aileron motor on-off Readily does consecutive outside loops Note stopwatch transmitter flight timed recorded Keep tuned series Bob Kopski will discussing hows whys Electrics 78 Model Aviation meantime offer following 28th year RC Five years ago sold gas stuff because found flying Electrics enjoying gas less Since Ive done flying ever before True can always double fuel tank size keep gas engine running longer theres no equivalent trick easily done Electrics However done right theres nothing inadequate unsatisfying about todays Electric flight times 5 Electric hard understand What I have no help Read ModelAviation will very best answer Now some advantages oppor tunities electric power offers 1 Electric challenging new kind modeling fun mentioned earlier Fun what hobby about modelers renowned taking up challenge 2 Electric power applicable over very broad range model flying categories Offhand cant think gas-powered category could have Electric equivalent Thus no matter what favor ite modeling specialty its gas-powered electric-powered version probably pos sible 3 Electric can create new categories example Sailplane enthusiasts generally purists want nothing onboard power dont blame last thing glider guiders would want glow engine stuck somewhere graceful birds times hauling winch out untangling snarled hi-start unappealing Heres clean compromise possible sleekly-cowled quietly-geared electric motor turning large fan having folding blades blend graceful fuse lage contours way go new category Nope Its called F3E Elec troflight its FAI section AMA rule book honest thought new think its un derstatement say F3E does yet have good foothold US sense new Assuming event may become World Championship challenging opportunity com petitive typesbut beyond scope series 4 Electric very convenient Often find time opportunity avail able flight two times will dark hour cleaning greasies off favorite neighbor irritator just isnt worth bother No bother Electric Just toss car charging along way nearest field fly dont need field box youre quietly recharging can talk very loud voice over flight line roar buddies Now take another flight pack everyone Continued page 80 PEPPERMINT PATTIE-60 Degedb Wa N Om k 1164F BRED ASS FUSE AGE w firewall taIlAeSf& wing fillets FLITEGLAS MODELSSee deale 0 Order direct WINGASTABILIZER FOAM C ply Sling AILERONS ELEVATOR B RU rough Sanded ShapeMASTER KIT BASIC HARDWARE hingeS aileron connectorS SloOlO BAR/RICH SALES CO 2 FAIRWAY lofAun rods CISSiSeS thtnaded fodSHANNIBAL MO O340f 314 22f-8803 WINGSPAN-BB AREABSS Sgifl ENGINE- BO WEIGHT 7510 AlES FLY THE BEST September 1983 79 N FULL LINE METAL SPECIALISTS J-5s DEEP SEA CRUISER Great sport boat just fun boating J-5s DEEP SEA CRUISER tos running 1 2 foot Speeds up 25-30 mph 7 48 LOA x 181/2 beam x 11 deep Easy build mahogany plywood soft wood construction Designed ~or hobby Ouadra TML 35 gasoline engine Kit includes fulisize plan instructions FULL-SIZE PLANS NOW PRODUCED IN THE US Mciic Inociporated 322 So Gallatin Rd son TN 371 615 8686811 Mon thin Sat gm 500 pm ATTENTION QUARTER & GIANT SCALE MQDELERS LLiT-SAP need iti LLiT-SAP multiple wvo LONG LEAD INTERFERENCE TRAP & SERVO ALTERNATE POWER adap tar Specify radio ordering $2995 postage paid send large SSAE for ilterature eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK SIZES else tearing up paper towels swabbing gobs icky goo off drippy gassers last drop usually will fall living room rug 5 Electric quiet Theres no argument Its very sad true modeling groups finding harder harder keep fields several rea sons often its because noise People dont like noise often choose make neighborhood cause-celebre Electric can savior regard have interesting personal experience Prior mid-1960s no club used mufflers day casual complaint harsh words petition etc etc Fortunately saved field adopting mandatory muffler rule backed up sound level meter etc After extended period flying mufflers occasion visit another field mufflers used personally found higher noise level very irritating become accustomed muffled engines recently Electrics field part day gas job brought out find lost peace noise very discomforting know number dedicated Sailplane enthusiasts similar stories tell What Im saying no way wish deny fellow fliers pleasure can relate effects implications noise person 6 Electric makes better model builder As described above electricpower installation heavier com parable glow have learned ways build stronger lighter structures help accommodate extra ounces 1 will dis cuss continue series Some ideas may help make better gas jobs 7 Electric makes better model flier Since relatively speaking realities higher weight lower power Electrics cannot always horse' plane off ground through maneuver have flying less guiding power plant wing wonderful thing have gotten never knew really fly because its easy fix everything throttle Ive seen good experi enced pilots first Electricpulling back hard elevator stick have plane tumble ground What got simple stall familiar power reserve pull through take same plane ease little up Presto wing does its thing lift plane goes up smoothly steadily 8 Electrics can open up new flying fields point goes beyond earlier discussion keeping have Ive personal experience lunchtime flying property employer Other some lunchtime strollers no knew did attract signi ficant attention because no heard flying So much nooners Continued page 167 80 Model Aviation KIT & DRIVE TRAIN $14950 3-5 ENTRPRISUS KIT DRIVE TRAIN & ENGiNE $26950 258 Schuman Dr Newmarket Alabama 35781 Phone 1-205-e522586 PO Des C2 Belmont Ontario NOt 180 Phone 1519-644-0375 S 1795 REPAIR SERVICE FOR HOBBY LOBBY EK LOGiCTROL FUTABA T HOBBY SHACK ROYAL LINE SALESI RADIO SYSTEMS FUTABA ROYAL ACCESSORIES FOR MOST RADIOSI QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE I OR CUSTOM 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG contact use positive-point contact engaged first thumb tilted back touch rear head engine making contact eliminates need use two fingers starting either Slow Rat Scale Race engines twofinger approach seems work better Rat Racers prevent inadvertent grounding out male plug merely pulled slot switch can turned off required knee support band used hold battery firmly arm people also using long length elastic bandage wrapped around tied securely however knee leg-support bandage seems preferred item addition will note leg-support bandage slipped un derneath voltage regulator holds little white arm correct voltage posi tion whatever type plug being used engine As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Electrics/Kopski Continued page 80 9 You can run motor house midnight probably survive incident long enough again again big help getting new ship ready Saturday Sunday morning flying session 10 Electric absolutely clean Consider flying flO-powered Pattern ship new suit note feelings Now men tally convert picture Electric same suit See No problem Electrons Continued page 168 Winning kleas FOURMOST RETRACTABLE OW HOOK RELEASE Price Simplest reliable device available After line released hook retracts body unit leaving SMOOTH surface bottom aircraft No special attachments required N eight THER FOURMOST PRODUCTS 0491051 AIRFLO ENGINE MOUNT REDUCES DRAG VIBRATION FREE PRICE $300 Fuel Fitting Sets Fuel Shut Off Fuel Manifold Geples Hinges Gaplm Hinge Slotter Strut Fairinp Cockpit Coammg nd SASE Complete Information FURST 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 * *SAILPLANE**PAW DIESELS hi-starts/winches/accessoriesEnglands Finest complete line/best prices/top quality049 29 New low low prices envelope catalog/information toSend $100 list RLF PRODUCTSEric Clutton 3816 DeSoto Ave R3 Box 178-Y PeoIijN 47464 IZLIFort Myers Florida 33905 product review product review product review rhis item precision tool designed dispense arefully-confrolled amounts low-viscosity fluids uch oils solvents anerobics Cyanoacrylate adhesives molded high-density polyethylene Ind features replaceable tip Refillable has apacity 6cc will dispense either metered dots r thin lines its contents also provides stable forage moisture-sensitive materials Look lobby craft dealers roduct review product review product review 4 Harold models cire exttiortFnarli orrJnciry September 1983 167 40 AIRFLO ENGINE MOUNT IDEAL FOR QUICKY 500 PRICE Dispens-If pencil dispensing low-viscosity fluids i $295 Hobby Factory Inc PO Box 321 Kutztown PA 19530 Advanced design features never before seen R/C Helicopter Tnple ball bearings main tail rotorhubsLight weight metal construction AutorotationLow cost parts Controls designed inverted flightA11 versions fully aerobatic AMA/FAI patterns Oual ball bearing tail pitch controlSpiral hypoid gears main tail drives EASTERN US HELICENTER EAST 412/342-5500 ozone dont leave stains 11 Multi-motor aircraft very easy Electrics because electric motors usually well-matched performance charac teristics powered same bat tery several motors will run run down same rate No chance losing side really great Scale Some local fliers have several twins quads operational 12 Electric motors can fully con trolled flight can done onoff fashion power steps in-between fully-variable speed control zero maximum Try gas 13 Electric power virtually vibrationfree often allows simple radio stallation less foam packing shock mounting needed stallations nearly rigid receivers servos etc squeezed tightly go along 14 Electric simply perfect Wrong Like everything else life Electrics have both limitations capability require ments proper handling Example just conscientious modeler should careful allow gas engine overheat also should such modeler pay close atten tion battery heat series will attempt thorough honest realistic include everything didnt know needed know about Electrics realize some writing above makes redundant points purpose fill pages same words rather express range thoughts sev eral ways give reader variety viewpoint perspective next installment series will get electric power systemsmotors batteries some other Electric goodies Later well get installations suitable planes Till just ponder possibilities Any questions related part series may directed SASE author Bob Kopski 25 West End Dr Lans dale PA 19446 Please resist temptation jump ahead have yet write series Im unable handle letters require books worth writing answer properly Otherwise will attempt respond expedient fashion Dove 650/Powell Continued page 88 assure sides parallel CyA-glue sq tail post side fuselage flat building board draw two paral lel lines slightly longer fuselage separated width fuselage Draw third parallel line centered exactly between first two Line up pin front part fuselage board top down exactly between lines Make sure its pinned securely rigidly Adjust pin glue sides together tail post such tail end centered exactly centerline Pin F-3 F-4 F-5 F-6 place glue CyA sizes formers shown plan nominal should cut actual sizes needed rest fuselage relatively straightforward Glue /2 ply tank compartment floor place over engine mounts install blind nut tank hold-down Drill engine mount holes install blind mounting nuts Add nose filler blocks A-in top block insert building motor spinner no cylinder mounted A2-in brass shims shown plan Tack-glue top block bottom block cowl assembly place carve fuselage shape piece cowl removed completed including tie-downs after top bottom blocks removed hollowed carved hollowed top bottom blocks should weigh about 1/4-I oz total Reinforce inside nose cowl fiberglass cloth polyester resin Fuel-proof entire engine com partment several heavy coats resin stab-elevator assembly original model constructed foam cores shown Lightening holes foam shown plan may cut reduce weight built-up assembly will work well key strength rigidity light ness center joint stab should reinforced glass cloth completed assembly should weigh 1-20 oz fin rudder assembly can made very lightweight V4 /6 sheet weight shouldnt exceed oz Assembly advise reweigh com ponent parts before assembly sure within stated tolerances particularly tail section anything too heavy build over last chance correct weight problem first step install wing fuselage Draw cross section wing root proper location fuselage sides cut out sections Next re move part fuselage sides bot tom doublers TE allow installation wing through bottom use jig align wing fuse lage follows Take piece building board about 60 inches square lay flat surface ie table floor Draw straight line down center board fuselage will centered line Determine TE wing would intersect line point draw line across board perpendicular first line TE will lined up along line Pin fuselage top-down centered fuselage line Place wing fuselage line up TE TE line Next line up centers LE TE wing line drawn fuselage Also vertical sides fuse lage must perpendicular wing Once have wing aligned fuselage three directions pin ned place tack-glue CyA Proper 168 Model Aviation O New Expandable concept RIC Helicopters Competitor will fly 45050 or60 size engines o model can take novice flying winning AMA expert class