Couirol Scale Bob & Dolly Wischer 36 Model Aviation Weldon Smiths Bell RP-63G Kingcobrs 3 years making photo above little nameplate bythe nose wheel says airplane alive target Flown bya live pilot Fired atwith live ammunition explanation article Photo below shows engine room Super tigre 60 makes gobut note goodies displayed custom muffler exhausting through 24 scale stacks long extension shaftto front-mounted belt reduction-drive 4-bladed cooling fan air comes through wing root air inlets rear-mounted air tank reservoir airoperated wheel brakes Photo left shows interior superdetailed cockpit functional cranks doors raise lowerthe sidewindows Weldon flewone real ones 1 g44 example fabulous masterpieces appear Toledo FLYING TECHNIQUE Wisconsin winters usually shorten flying season six seven months long idle period frigid months gives us plenty time model building also results some loss proficiency during first flights spring Using trainer-type plane helps re-establish confidence early going rather risk newly-finished Scale model dwrn ml IfliS uresi LOKOS LI-lAm UUSrter caie ni sngines spans 80-in weighs 21 lb jim Funduks latest mind-boggler Precision Scale Vought F4U Corsair has air-operated folding wings inline-twin made two Dooling 619 on-board starter real centerof attention Toledo trainer may introduce false sense assurance however Its forgiving nature may permit us forget devastating result high angle attack flying Scale model higher wing loading especially during periods reduced speed such climbing gliding light trainer larger-than-necessary engine may lead us believe altitude can acquired touch UP elevator surpris ing number pilots both fuilsize modelers have mistaken notion throttle speed control elevator controls altitude transmitter controls moved mechanically regard facts flight First step learningorunlearning process stop flying wide-open throttle Follow practice full-size planes using throttle position gives comfortable cruise speed set elevator trim control permit level flight wings angle attack speed will produce lift equal models weight Changing throttle position results climb descent important observation notice speed does change model climbs descends Without changing throttle position move elevator trim control UP elevator speed will reduced DOWN trim will increase speed observations air determine throttle altitude control elevator speed control Using two controls opposite manner can lead stalls spins crashes temptation pull nose up elevator stretching glide must resisted must agreed judging models attitude during glide distance pilot matter experience Because flying slowly its size doesnt change rapidly approaches head-on model appears losing altitude too rapidly touch throttle will slow descent gathering speed Adding too much throttle can cause model overshoot landing added DOWN elevator trim will result speed increase much same effect indication model about stall watch loss ofdirec Continued page 116 August1981 37 George Rose flew Curtiss Hawk p-BE last years Scale World Vito Tomeos HawKer ea 1-ury rD vii mu i n span Champs Ottawait took Best Show 1st Precision Scale won 1st Military Stand-off Scale Toledo year flown Toledo year truly magnificent model the 1980 Nats Note scale 5-bladed prop MIDWEST PRODUCTS COMPANY INC 4005 IndIana St Hobart IndIana 46342 219942-1134 send 1Ofl catalon KIORITZ ENiINES BY GIBBS HOBBY & RESEAI Original Developer Factory Trained Authorized Master Service Dealer Year Limited LnlJ Pre-Onhied Props Avail Ask About Custom- Built KIORITZ Engines Deep Fins Optimum Cooling 21/4 Flywheel Small Magneto 1 5/am Six Bolt Aluminum Hub Carb Needles &Throttle Accessible Engine Running IDon Godfrey 722-1765 Points Sealed Rear Housing $19995 pay shIp pre-pald orders Mufflers Now Availablel DEALERS WELCOME SPECIFICATIONS 242 Co 397ccWalbro Potnp CabSaii Reanogs Crank 32HP t 8000 ~3 Ring PistonCaged Rollers Rod Piston Pin Weight 64 lb GIBBS HOBBY & RESEARCH 6195 Hillfield St NW N CANTON OHIO 44720 Phone 216 499-8854 after 600 PM STOP-A-PROP BRAKES GEE BEE Z T-SHIRTA-ATDBrakeKltno 1O1$275 Attractive Black OnFAI CABBrake Kit no 102 $325 Yellow Poly/CottonB ke Kit no 103 Se Sizes SML1 ea size $8503 FAI size $850 Thsnd$1 PostAdaptor Kit$150 force coefficients themselves related other parameters may vary scale such Reynolds number Mach number disregard variations also disregard effect altitude air density can relate models ratio Ww full-size airplanes ratio NW through formula VS quation 4 Ww models wing loading can related full-size airplane directly through use formula information concerning ratio maneuver force weight ratio see Eq 3 w WV2 LW EquationS Sv2 NS Noting now S N2s just due static scaiing model weight full-size weight realted other via formula wN3 WEquation 6 Eq 5 presented graphically Fig 3 Eq 6 Fig 4 Equations 3 and6 relate speed weight model speed weight full-size airplane true dynamic scaie modeL will now consider final force ratio namely thrust/weight simplest ratios because must require models thrust/weight equal full-size airplanes thrust/weight leads simple formula wW combined Eq 6 models thrust full-size airplanes thrust related through equation 1 N3 T next series three articles laws dynamic scale will compared flyable K/C model constraints determine general relationships between two get feel types airplanes suitable candidates true dynamic scale models RC Scale/Wischers Continued page 37 tonal control nose begins wander side model may near stall point nose should lowered Sudden application throttle stall point avoided can precipitate fatal snap roll due engine torque Lowering nose will add bit speed after small increase throttle can used regain height lost due close appraoach stall Opening throttle first will merely reduce rate descent little effect impending stall predictable approach path best obtained using DOWN elevator trim keep speed well above stalling Large amounts UP elevator must reserved instant needed landing flare Too early will kill off speed required reach ground safely landing under windy conditions little additional speed recommended keep glide path being upset due turbulence can also predicted wind speed will constant way down surface Expect lessening wind caused friction earth obstructions Keep little extra speed avoid situation bottom drops out suddenlyjust model about flare its landing classic example Scale model accident snap roll takeoff Best insurance against often-fatal mishap control angle attack using bit DOWN elevator trim let model gather adequate speed before lifting off just touch UP elevator prepared release elevator instant nodel breaks surface lifts off too early two ingredients snap roll present low airspeed UP elevator As landing experience needed judging airspeed keep takeoff straight line prefer stand behind model point easy judge speed nosewheel model predictable takeoff run permits pilot stand side better observation acceleration third element surprise snap roll takeoff tail heaviness Check center gravity location carefully follow example other Scale modelers use much weight necessary place center proper location An error nose-heavy side preferred Planies Toledo As past years centers attention Toledo exhibit Jim Funduk year F4U Corsair threeyear project air-operated folding wings attracted constant interest plane numer ous other features some hidden Jim com bined two Dooling 61 engines connected in-line using Webra carburetor basic fuselage fiberglass 006-in aluminum cover Rudder elevator silk covered Trim tabs flaps operational hatches wings opened expose machine guns Best-of-show first place Precision Scale awards won George Rose well known Curtiss Hawk P-6E same plane has doing well contest circuit including second place recent World Championship Ottawa Georges first attendance Toledo prototype Hawk located Daytons Air Force Museum five-year-old model looks better ever refreshing see well-flown model winner Toledo Expo non-flying types radio installed have too often taken top prizes Second place Precision Scale won Weldon Smiths Bell RP-63GKingcobra target plane Now retired airline captain Weldon flown prototype ferry pilot 1944 Buffalo NY factory Texas Several hun dred target planes built guns omitted ton armor added protect against fire gunners simulated attacks air combat Thats right live ammunition fired plane live pilot visitor show Art Johnson pilots fly missions Art will remembered modeler flies P-38 P-40 P-82 Nats other events Weldon Art introduced spent happy half-hour listening stories about plane Art told RP-63G could withstand 30 caliber fire tried rifle denting surface finding soft spot penetrating through windshield remembers bullets finding way inside including cockpit well some rattled around inside air intakes wing root plane lights would flash target hit Getting back Weldons model plane quite large 84-in wingspan has Supertigre 60 engine mounted scale location mid ship 24 functional exhaust pipes leading its mufflers long shaft scale location extends nose 25-to-i reduction lowers prop speed Weldon now has Rossi 90 ready installation 60 proves insufficient Continued page 120 116 Model Aviation Finish international orange butyrate dope flattener added over silkspan complete fuselage top cockpit removeable access engine drive train Weldon has made electric retract mechanisms operational sprung landing gear legs reservoir supplies air bladder wheel brakes cockpit well detailed including operating hand cranks lowering side windows Unquestionably fine example Precision Scale Giant Scale class 18 lb Vito Tomeos scratch-built 1/6-scale Hawker Sea Fury first place winner Military Stand-off class seen 18 lb 77-in span model flight last years Nats Dennis Bryll placed second P-47 Thunderbolt Third place Stand-off winner anotherfamiliar plane having won first place 77 80 Nats P-6 1 Black Widow Roger Brennom 195 lb plane scratch-built Wylam drawings foam balsa construction Hobbypoxy finish Three hand-made nonretractable gear legs have two springs Roger has recently installed new OS 60 engines seems well-tried flying planes making appearance Toledo Non military Stand-off Scale Starduster Too Terry Williams awarded first place Team Selection proposal has made select three Scale Teams Seguin Nats F4C Radio Control F4B Control-line Stand-off Radio Control though nation making bid 1982 World Champ ionship has USSR have elected omit Stand-off RC being proposed basis another nation may make attractive bid 1982 would include Stand off RC preparations must made send team eventuality Therefore modelers wish have entries considered three classes must have FAI stamp AMA licenses must pay FAI entry fee addition Nats entry fee must enter model complies FAI rules should noted FAI designation event Stand-off RC Scale US called RC Sport Scale no other nation makes successful bid 1982 World Championship FAI plenary session December USSR bid accepted refunds FAI program entry fee will made AMA headquarters upon appli cation Sport Scale RC Nats contestants serious effort being made least other nation outbid USSR Stand-off RC can included present far popular Scale event nations except USSR certainly deserves World Cham pionship status Bob andDolly Wischer Rt 1 S-22lLapham Peak Roa4 Delafiel4 WI 53018 RC Aerobatics/Van Putte Continued page 41 7Z transmitter because great sticks convenient trim pot locations So made compromise bought Ace Silver Seven encoder kit replace Kraft encoder As usual Fred Marks has done fine job Ace developing kit instructions assembly adjustment troubleshooting Ace suggests experienced kit build ers attempt retrofit encoder another transmitter However Ive experience assembling Ace Royal servo kits trouble shooting servo problems building Royal re ceiver installing dual rate switches KP-7Z transmitter Consequently lam optimis tic half-vast experience will carry through job course intend thing instructions say thoroughly read what George Myers wrote column Silver Seven transmitter August 1980 is6ue Model Aviation things work out well youll hear about what great job did dont work out Ill probably forget mention Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Giant Scale/Beckman Continued page 43 indicates commercial props 18-10 size will deliver 20 25 lb thrust 8000 rpm Its no wonder prop pulls Wendells Skybolt good authority whole subject propellers has become fascinating hadnt really put much thought started engine project quickly became apparent testing props much engines variables involved impossible really cover everything properly space well have available going through tremendous learning process ourselves just hope will able pass along Plan reviews month reviewing two plans available Taylorcraft Ltd have around about two years first saw prototypes Bill Wendts Fokker DVIII Ken Runestrands L-4B Morgan Hill 1979 first Giant Scale Fly-in literaly overwhelmed new impressions information two birds stood out Bills DVIII built scale sounds odd US modelers 1 ft 1 meter alittlelessthan one-third scale Bill worked European drawings metric dimensions easier converting exact one-third scale plans three sheets approxi mately 3 ft 6 ft clear easily read contain fair amount detail dont have much detail control surface hinging control hook-up however dont have experience area youll need some help obvious aircraft designed big bangers mind Materials construc tion techniques rugged Basic structures spruce plywood some balsa mostly weight critical wing employs beautiful set box spars built up -in square spruce 1/32-in ply wing separates center both wing locking strut attachment systems ingenious simple effective plans show Quadra original flew nicely cowl will accept almost currently available engines building Bills plans change would make use foam-core board some ribs formers rudder elevator cores already know Im hooked foam-core L-4B Grasshopper ubiquitous Piper Cub uniform Painted olive drab cabin windows extended behind wing used throughout WW II liaison observation aircraft Kens plans unusual can used modify existing kit Nosen Balsa USA manner builder selects cuts materials work kit sure make material changes indicated Kens plans Continued page 122 120 Model Aviation job heresonethatwill 37 Cu engine develops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitta straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty OMPLETE MODIFIED 37 ENGINE Lnul I. r.at ramoivgq Senu .ct MO COD UPS Add $400 shipping & Ia SCALE DOCUIVIENTATION SCALE DRAWHOTOS eOCKLETS IP REPLA-TECH 191 INTERNATIONAL CATALOGS $200 4SEOO MC KENZIE HWY VIDA OREGON 974B9
Edition: Model Aviation - 1981/08
Page Numbers: 36, 37, 116, 120
Couirol Scale Bob & Dolly Wischer 36 Model Aviation Weldon Smiths Bell RP-63G Kingcobrs 3 years making photo above little nameplate bythe nose wheel says airplane alive target Flown bya live pilot Fired atwith live ammunition explanation article Photo below shows engine room Super tigre 60 makes gobut note goodies displayed custom muffler exhausting through 24 scale stacks long extension shaftto front-mounted belt reduction-drive 4-bladed cooling fan air comes through wing root air inlets rear-mounted air tank reservoir airoperated wheel brakes Photo left shows interior superdetailed cockpit functional cranks doors raise lowerthe sidewindows Weldon flewone real ones 1 g44 example fabulous masterpieces appear Toledo FLYING TECHNIQUE Wisconsin winters usually shorten flying season six seven months long idle period frigid months gives us plenty time model building also results some loss proficiency during first flights spring Using trainer-type plane helps re-establish confidence early going rather risk newly-finished Scale model dwrn ml IfliS uresi LOKOS LI-lAm UUSrter caie ni sngines spans 80-in weighs 21 lb jim Funduks latest mind-boggler Precision Scale Vought F4U Corsair has air-operated folding wings inline-twin made two Dooling 619 on-board starter real centerof attention Toledo trainer may introduce false sense assurance however Its forgiving nature may permit us forget devastating result high angle attack flying Scale model higher wing loading especially during periods reduced speed such climbing gliding light trainer larger-than-necessary engine may lead us believe altitude can acquired touch UP elevator surpris ing number pilots both fuilsize modelers have mistaken notion throttle speed control elevator controls altitude transmitter controls moved mechanically regard facts flight First step learningorunlearning process stop flying wide-open throttle Follow practice full-size planes using throttle position gives comfortable cruise speed set elevator trim control permit level flight wings angle attack speed will produce lift equal models weight Changing throttle position results climb descent important observation notice speed does change model climbs descends Without changing throttle position move elevator trim control UP elevator speed will reduced DOWN trim will increase speed observations air determine throttle altitude control elevator speed control Using two controls opposite manner can lead stalls spins crashes temptation pull nose up elevator stretching glide must resisted must agreed judging models attitude during glide distance pilot matter experience Because flying slowly its size doesnt change rapidly approaches head-on model appears losing altitude too rapidly touch throttle will slow descent gathering speed Adding too much throttle can cause model overshoot landing added DOWN elevator trim will result speed increase much same effect indication model about stall watch loss ofdirec Continued page 116 August1981 37 George Rose flew Curtiss Hawk p-BE last years Scale World Vito Tomeos HawKer ea 1-ury rD vii mu i n span Champs Ottawait took Best Show 1st Precision Scale won 1st Military Stand-off Scale Toledo year flown Toledo year truly magnificent model the 1980 Nats Note scale 5-bladed prop MIDWEST PRODUCTS COMPANY INC 4005 IndIana St Hobart IndIana 46342 219942-1134 send 1Ofl catalon KIORITZ ENiINES BY GIBBS HOBBY & RESEAI Original Developer Factory Trained Authorized Master Service Dealer Year Limited LnlJ Pre-Onhied Props Avail Ask About Custom- Built KIORITZ Engines Deep Fins Optimum Cooling 21/4 Flywheel Small Magneto 1 5/am Six Bolt Aluminum Hub Carb Needles &Throttle Accessible Engine Running IDon Godfrey 722-1765 Points Sealed Rear Housing $19995 pay shIp pre-pald orders Mufflers Now Availablel DEALERS WELCOME SPECIFICATIONS 242 Co 397ccWalbro Potnp CabSaii Reanogs Crank 32HP t 8000 ~3 Ring PistonCaged Rollers Rod Piston Pin Weight 64 lb GIBBS HOBBY & RESEARCH 6195 Hillfield St NW N CANTON OHIO 44720 Phone 216 499-8854 after 600 PM STOP-A-PROP BRAKES GEE BEE Z T-SHIRTA-ATDBrakeKltno 1O1$275 Attractive Black OnFAI CABBrake Kit no 102 $325 Yellow Poly/CottonB ke Kit no 103 Se Sizes SML1 ea size $8503 FAI size $850 Thsnd$1 PostAdaptor Kit$150 force coefficients themselves related other parameters may vary scale such Reynolds number Mach number disregard variations also disregard effect altitude air density can relate models ratio Ww full-size airplanes ratio NW through formula VS quation 4 Ww models wing loading can related full-size airplane directly through use formula information concerning ratio maneuver force weight ratio see Eq 3 w WV2 LW EquationS Sv2 NS Noting now S N2s just due static scaiing model weight full-size weight realted other via formula wN3 WEquation 6 Eq 5 presented graphically Fig 3 Eq 6 Fig 4 Equations 3 and6 relate speed weight model speed weight full-size airplane true dynamic scaie modeL will now consider final force ratio namely thrust/weight simplest ratios because must require models thrust/weight equal full-size airplanes thrust/weight leads simple formula wW combined Eq 6 models thrust full-size airplanes thrust related through equation 1 N3 T next series three articles laws dynamic scale will compared flyable K/C model constraints determine general relationships between two get feel types airplanes suitable candidates true dynamic scale models RC Scale/Wischers Continued page 37 tonal control nose begins wander side model may near stall point nose should lowered Sudden application throttle stall point avoided can precipitate fatal snap roll due engine torque Lowering nose will add bit speed after small increase throttle can used regain height lost due close appraoach stall Opening throttle first will merely reduce rate descent little effect impending stall predictable approach path best obtained using DOWN elevator trim keep speed well above stalling Large amounts UP elevator must reserved instant needed landing flare Too early will kill off speed required reach ground safely landing under windy conditions little additional speed recommended keep glide path being upset due turbulence can also predicted wind speed will constant way down surface Expect lessening wind caused friction earth obstructions Keep little extra speed avoid situation bottom drops out suddenlyjust model about flare its landing classic example Scale model accident snap roll takeoff Best insurance against often-fatal mishap control angle attack using bit DOWN elevator trim let model gather adequate speed before lifting off just touch UP elevator prepared release elevator instant nodel breaks surface lifts off too early two ingredients snap roll present low airspeed UP elevator As landing experience needed judging airspeed keep takeoff straight line prefer stand behind model point easy judge speed nosewheel model predictable takeoff run permits pilot stand side better observation acceleration third element surprise snap roll takeoff tail heaviness Check center gravity location carefully follow example other Scale modelers use much weight necessary place center proper location An error nose-heavy side preferred Planies Toledo As past years centers attention Toledo exhibit Jim Funduk year F4U Corsair threeyear project air-operated folding wings attracted constant interest plane numer ous other features some hidden Jim com bined two Dooling 61 engines connected in-line using Webra carburetor basic fuselage fiberglass 006-in aluminum cover Rudder elevator silk covered Trim tabs flaps operational hatches wings opened expose machine guns Best-of-show first place Precision Scale awards won George Rose well known Curtiss Hawk P-6E same plane has doing well contest circuit including second place recent World Championship Ottawa Georges first attendance Toledo prototype Hawk located Daytons Air Force Museum five-year-old model looks better ever refreshing see well-flown model winner Toledo Expo non-flying types radio installed have too often taken top prizes Second place Precision Scale won Weldon Smiths Bell RP-63GKingcobra target plane Now retired airline captain Weldon flown prototype ferry pilot 1944 Buffalo NY factory Texas Several hun dred target planes built guns omitted ton armor added protect against fire gunners simulated attacks air combat Thats right live ammunition fired plane live pilot visitor show Art Johnson pilots fly missions Art will remembered modeler flies P-38 P-40 P-82 Nats other events Weldon Art introduced spent happy half-hour listening stories about plane Art told RP-63G could withstand 30 caliber fire tried rifle denting surface finding soft spot penetrating through windshield remembers bullets finding way inside including cockpit well some rattled around inside air intakes wing root plane lights would flash target hit Getting back Weldons model plane quite large 84-in wingspan has Supertigre 60 engine mounted scale location mid ship 24 functional exhaust pipes leading its mufflers long shaft scale location extends nose 25-to-i reduction lowers prop speed Weldon now has Rossi 90 ready installation 60 proves insufficient Continued page 120 116 Model Aviation Finish international orange butyrate dope flattener added over silkspan complete fuselage top cockpit removeable access engine drive train Weldon has made electric retract mechanisms operational sprung landing gear legs reservoir supplies air bladder wheel brakes cockpit well detailed including operating hand cranks lowering side windows Unquestionably fine example Precision Scale Giant Scale class 18 lb Vito Tomeos scratch-built 1/6-scale Hawker Sea Fury first place winner Military Stand-off class seen 18 lb 77-in span model flight last years Nats Dennis Bryll placed second P-47 Thunderbolt Third place Stand-off winner anotherfamiliar plane having won first place 77 80 Nats P-6 1 Black Widow Roger Brennom 195 lb plane scratch-built Wylam drawings foam balsa construction Hobbypoxy finish Three hand-made nonretractable gear legs have two springs Roger has recently installed new OS 60 engines seems well-tried flying planes making appearance Toledo Non military Stand-off Scale Starduster Too Terry Williams awarded first place Team Selection proposal has made select three Scale Teams Seguin Nats F4C Radio Control F4B Control-line Stand-off Radio Control though nation making bid 1982 World Champ ionship has USSR have elected omit Stand-off RC being proposed basis another nation may make attractive bid 1982 would include Stand off RC preparations must made send team eventuality Therefore modelers wish have entries considered three classes must have FAI stamp AMA licenses must pay FAI entry fee addition Nats entry fee must enter model complies FAI rules should noted FAI designation event Stand-off RC Scale US called RC Sport Scale no other nation makes successful bid 1982 World Championship FAI plenary session December USSR bid accepted refunds FAI program entry fee will made AMA headquarters upon appli cation Sport Scale RC Nats contestants serious effort being made least other nation outbid USSR Stand-off RC can included present far popular Scale event nations except USSR certainly deserves World Cham pionship status Bob andDolly Wischer Rt 1 S-22lLapham Peak Roa4 Delafiel4 WI 53018 RC Aerobatics/Van Putte Continued page 41 7Z transmitter because great sticks convenient trim pot locations So made compromise bought Ace Silver Seven encoder kit replace Kraft encoder As usual Fred Marks has done fine job Ace developing kit instructions assembly adjustment troubleshooting Ace suggests experienced kit build ers attempt retrofit encoder another transmitter However Ive experience assembling Ace Royal servo kits trouble shooting servo problems building Royal re ceiver installing dual rate switches KP-7Z transmitter Consequently lam optimis tic half-vast experience will carry through job course intend thing instructions say thoroughly read what George Myers wrote column Silver Seven transmitter August 1980 is6ue Model Aviation things work out well youll hear about what great job did dont work out Ill probably forget mention Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Giant Scale/Beckman Continued page 43 indicates commercial props 18-10 size will deliver 20 25 lb thrust 8000 rpm Its no wonder prop pulls Wendells Skybolt good authority whole subject propellers has become fascinating hadnt really put much thought started engine project quickly became apparent testing props much engines variables involved impossible really cover everything properly space well have available going through tremendous learning process ourselves just hope will able pass along Plan reviews month reviewing two plans available Taylorcraft Ltd have around about two years first saw prototypes Bill Wendts Fokker DVIII Ken Runestrands L-4B Morgan Hill 1979 first Giant Scale Fly-in literaly overwhelmed new impressions information two birds stood out Bills DVIII built scale sounds odd US modelers 1 ft 1 meter alittlelessthan one-third scale Bill worked European drawings metric dimensions easier converting exact one-third scale plans three sheets approxi mately 3 ft 6 ft clear easily read contain fair amount detail dont have much detail control surface hinging control hook-up however dont have experience area youll need some help obvious aircraft designed big bangers mind Materials construc tion techniques rugged Basic structures spruce plywood some balsa mostly weight critical wing employs beautiful set box spars built up -in square spruce 1/32-in ply wing separates center both wing locking strut attachment systems ingenious simple effective plans show Quadra original flew nicely cowl will accept almost currently available engines building Bills plans change would make use foam-core board some ribs formers rudder elevator cores already know Im hooked foam-core L-4B Grasshopper ubiquitous Piper Cub uniform Painted olive drab cabin windows extended behind wing used throughout WW II liaison observation aircraft Kens plans unusual can used modify existing kit Nosen Balsa USA manner builder selects cuts materials work kit sure make material changes indicated Kens plans Continued page 122 120 Model Aviation job heresonethatwill 37 Cu engine develops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitta straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty OMPLETE MODIFIED 37 ENGINE Lnul I. r.at ramoivgq Senu .ct MO COD UPS Add $400 shipping & Ia SCALE DOCUIVIENTATION SCALE DRAWHOTOS eOCKLETS IP REPLA-TECH 191 INTERNATIONAL CATALOGS $200 4SEOO MC KENZIE HWY VIDA OREGON 974B9
Edition: Model Aviation - 1981/08
Page Numbers: 36, 37, 116, 120
Couirol Scale Bob & Dolly Wischer 36 Model Aviation Weldon Smiths Bell RP-63G Kingcobrs 3 years making photo above little nameplate bythe nose wheel says airplane alive target Flown bya live pilot Fired atwith live ammunition explanation article Photo below shows engine room Super tigre 60 makes gobut note goodies displayed custom muffler exhausting through 24 scale stacks long extension shaftto front-mounted belt reduction-drive 4-bladed cooling fan air comes through wing root air inlets rear-mounted air tank reservoir airoperated wheel brakes Photo left shows interior superdetailed cockpit functional cranks doors raise lowerthe sidewindows Weldon flewone real ones 1 g44 example fabulous masterpieces appear Toledo FLYING TECHNIQUE Wisconsin winters usually shorten flying season six seven months long idle period frigid months gives us plenty time model building also results some loss proficiency during first flights spring Using trainer-type plane helps re-establish confidence early going rather risk newly-finished Scale model dwrn ml IfliS uresi LOKOS LI-lAm UUSrter caie ni sngines spans 80-in weighs 21 lb jim Funduks latest mind-boggler Precision Scale Vought F4U Corsair has air-operated folding wings inline-twin made two Dooling 619 on-board starter real centerof attention Toledo trainer may introduce false sense assurance however Its forgiving nature may permit us forget devastating result high angle attack flying Scale model higher wing loading especially during periods reduced speed such climbing gliding light trainer larger-than-necessary engine may lead us believe altitude can acquired touch UP elevator surpris ing number pilots both fuilsize modelers have mistaken notion throttle speed control elevator controls altitude transmitter controls moved mechanically regard facts flight First step learningorunlearning process stop flying wide-open throttle Follow practice full-size planes using throttle position gives comfortable cruise speed set elevator trim control permit level flight wings angle attack speed will produce lift equal models weight Changing throttle position results climb descent important observation notice speed does change model climbs descends Without changing throttle position move elevator trim control UP elevator speed will reduced DOWN trim will increase speed observations air determine throttle altitude control elevator speed control Using two controls opposite manner can lead stalls spins crashes temptation pull nose up elevator stretching glide must resisted must agreed judging models attitude during glide distance pilot matter experience Because flying slowly its size doesnt change rapidly approaches head-on model appears losing altitude too rapidly touch throttle will slow descent gathering speed Adding too much throttle can cause model overshoot landing added DOWN elevator trim will result speed increase much same effect indication model about stall watch loss ofdirec Continued page 116 August1981 37 George Rose flew Curtiss Hawk p-BE last years Scale World Vito Tomeos HawKer ea 1-ury rD vii mu i n span Champs Ottawait took Best Show 1st Precision Scale won 1st Military Stand-off Scale Toledo year flown Toledo year truly magnificent model the 1980 Nats Note scale 5-bladed prop MIDWEST PRODUCTS COMPANY INC 4005 IndIana St Hobart IndIana 46342 219942-1134 send 1Ofl catalon KIORITZ ENiINES BY GIBBS HOBBY & RESEAI Original Developer Factory Trained Authorized Master Service Dealer Year Limited LnlJ Pre-Onhied Props Avail Ask About Custom- Built KIORITZ Engines Deep Fins Optimum Cooling 21/4 Flywheel Small Magneto 1 5/am Six Bolt Aluminum Hub Carb Needles &Throttle Accessible Engine Running IDon Godfrey 722-1765 Points Sealed Rear Housing $19995 pay shIp pre-pald orders Mufflers Now Availablel DEALERS WELCOME SPECIFICATIONS 242 Co 397ccWalbro Potnp CabSaii Reanogs Crank 32HP t 8000 ~3 Ring PistonCaged Rollers Rod Piston Pin Weight 64 lb GIBBS HOBBY & RESEARCH 6195 Hillfield St NW N CANTON OHIO 44720 Phone 216 499-8854 after 600 PM STOP-A-PROP BRAKES GEE BEE Z T-SHIRTA-ATDBrakeKltno 1O1$275 Attractive Black OnFAI CABBrake Kit no 102 $325 Yellow Poly/CottonB ke Kit no 103 Se Sizes SML1 ea size $8503 FAI size $850 Thsnd$1 PostAdaptor Kit$150 force coefficients themselves related other parameters may vary scale such Reynolds number Mach number disregard variations also disregard effect altitude air density can relate models ratio Ww full-size airplanes ratio NW through formula VS quation 4 Ww models wing loading can related full-size airplane directly through use formula information concerning ratio maneuver force weight ratio see Eq 3 w WV2 LW EquationS Sv2 NS Noting now S N2s just due static scaiing model weight full-size weight realted other via formula wN3 WEquation 6 Eq 5 presented graphically Fig 3 Eq 6 Fig 4 Equations 3 and6 relate speed weight model speed weight full-size airplane true dynamic scaie modeL will now consider final force ratio namely thrust/weight simplest ratios because must require models thrust/weight equal full-size airplanes thrust/weight leads simple formula wW combined Eq 6 models thrust full-size airplanes thrust related through equation 1 N3 T next series three articles laws dynamic scale will compared flyable K/C model constraints determine general relationships between two get feel types airplanes suitable candidates true dynamic scale models RC Scale/Wischers Continued page 37 tonal control nose begins wander side model may near stall point nose should lowered Sudden application throttle stall point avoided can precipitate fatal snap roll due engine torque Lowering nose will add bit speed after small increase throttle can used regain height lost due close appraoach stall Opening throttle first will merely reduce rate descent little effect impending stall predictable approach path best obtained using DOWN elevator trim keep speed well above stalling Large amounts UP elevator must reserved instant needed landing flare Too early will kill off speed required reach ground safely landing under windy conditions little additional speed recommended keep glide path being upset due turbulence can also predicted wind speed will constant way down surface Expect lessening wind caused friction earth obstructions Keep little extra speed avoid situation bottom drops out suddenlyjust model about flare its landing classic example Scale model accident snap roll takeoff Best insurance against often-fatal mishap control angle attack using bit DOWN elevator trim let model gather adequate speed before lifting off just touch UP elevator prepared release elevator instant nodel breaks surface lifts off too early two ingredients snap roll present low airspeed UP elevator As landing experience needed judging airspeed keep takeoff straight line prefer stand behind model point easy judge speed nosewheel model predictable takeoff run permits pilot stand side better observation acceleration third element surprise snap roll takeoff tail heaviness Check center gravity location carefully follow example other Scale modelers use much weight necessary place center proper location An error nose-heavy side preferred Planies Toledo As past years centers attention Toledo exhibit Jim Funduk year F4U Corsair threeyear project air-operated folding wings attracted constant interest plane numer ous other features some hidden Jim com bined two Dooling 61 engines connected in-line using Webra carburetor basic fuselage fiberglass 006-in aluminum cover Rudder elevator silk covered Trim tabs flaps operational hatches wings opened expose machine guns Best-of-show first place Precision Scale awards won George Rose well known Curtiss Hawk P-6E same plane has doing well contest circuit including second place recent World Championship Ottawa Georges first attendance Toledo prototype Hawk located Daytons Air Force Museum five-year-old model looks better ever refreshing see well-flown model winner Toledo Expo non-flying types radio installed have too often taken top prizes Second place Precision Scale won Weldon Smiths Bell RP-63GKingcobra target plane Now retired airline captain Weldon flown prototype ferry pilot 1944 Buffalo NY factory Texas Several hun dred target planes built guns omitted ton armor added protect against fire gunners simulated attacks air combat Thats right live ammunition fired plane live pilot visitor show Art Johnson pilots fly missions Art will remembered modeler flies P-38 P-40 P-82 Nats other events Weldon Art introduced spent happy half-hour listening stories about plane Art told RP-63G could withstand 30 caliber fire tried rifle denting surface finding soft spot penetrating through windshield remembers bullets finding way inside including cockpit well some rattled around inside air intakes wing root plane lights would flash target hit Getting back Weldons model plane quite large 84-in wingspan has Supertigre 60 engine mounted scale location mid ship 24 functional exhaust pipes leading its mufflers long shaft scale location extends nose 25-to-i reduction lowers prop speed Weldon now has Rossi 90 ready installation 60 proves insufficient Continued page 120 116 Model Aviation Finish international orange butyrate dope flattener added over silkspan complete fuselage top cockpit removeable access engine drive train Weldon has made electric retract mechanisms operational sprung landing gear legs reservoir supplies air bladder wheel brakes cockpit well detailed including operating hand cranks lowering side windows Unquestionably fine example Precision Scale Giant Scale class 18 lb Vito Tomeos scratch-built 1/6-scale Hawker Sea Fury first place winner Military Stand-off class seen 18 lb 77-in span model flight last years Nats Dennis Bryll placed second P-47 Thunderbolt Third place Stand-off winner anotherfamiliar plane having won first place 77 80 Nats P-6 1 Black Widow Roger Brennom 195 lb plane scratch-built Wylam drawings foam balsa construction Hobbypoxy finish Three hand-made nonretractable gear legs have two springs Roger has recently installed new OS 60 engines seems well-tried flying planes making appearance Toledo Non military Stand-off Scale Starduster Too Terry Williams awarded first place Team Selection proposal has made select three Scale Teams Seguin Nats F4C Radio Control F4B Control-line Stand-off Radio Control though nation making bid 1982 World Champ ionship has USSR have elected omit Stand-off RC being proposed basis another nation may make attractive bid 1982 would include Stand off RC preparations must made send team eventuality Therefore modelers wish have entries considered three classes must have FAI stamp AMA licenses must pay FAI entry fee addition Nats entry fee must enter model complies FAI rules should noted FAI designation event Stand-off RC Scale US called RC Sport Scale no other nation makes successful bid 1982 World Championship FAI plenary session December USSR bid accepted refunds FAI program entry fee will made AMA headquarters upon appli cation Sport Scale RC Nats contestants serious effort being made least other nation outbid USSR Stand-off RC can included present far popular Scale event nations except USSR certainly deserves World Cham pionship status Bob andDolly Wischer Rt 1 S-22lLapham Peak Roa4 Delafiel4 WI 53018 RC Aerobatics/Van Putte Continued page 41 7Z transmitter because great sticks convenient trim pot locations So made compromise bought Ace Silver Seven encoder kit replace Kraft encoder As usual Fred Marks has done fine job Ace developing kit instructions assembly adjustment troubleshooting Ace suggests experienced kit build ers attempt retrofit encoder another transmitter However Ive experience assembling Ace Royal servo kits trouble shooting servo problems building Royal re ceiver installing dual rate switches KP-7Z transmitter Consequently lam optimis tic half-vast experience will carry through job course intend thing instructions say thoroughly read what George Myers wrote column Silver Seven transmitter August 1980 is6ue Model Aviation things work out well youll hear about what great job did dont work out Ill probably forget mention Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Giant Scale/Beckman Continued page 43 indicates commercial props 18-10 size will deliver 20 25 lb thrust 8000 rpm Its no wonder prop pulls Wendells Skybolt good authority whole subject propellers has become fascinating hadnt really put much thought started engine project quickly became apparent testing props much engines variables involved impossible really cover everything properly space well have available going through tremendous learning process ourselves just hope will able pass along Plan reviews month reviewing two plans available Taylorcraft Ltd have around about two years first saw prototypes Bill Wendts Fokker DVIII Ken Runestrands L-4B Morgan Hill 1979 first Giant Scale Fly-in literaly overwhelmed new impressions information two birds stood out Bills DVIII built scale sounds odd US modelers 1 ft 1 meter alittlelessthan one-third scale Bill worked European drawings metric dimensions easier converting exact one-third scale plans three sheets approxi mately 3 ft 6 ft clear easily read contain fair amount detail dont have much detail control surface hinging control hook-up however dont have experience area youll need some help obvious aircraft designed big bangers mind Materials construc tion techniques rugged Basic structures spruce plywood some balsa mostly weight critical wing employs beautiful set box spars built up -in square spruce 1/32-in ply wing separates center both wing locking strut attachment systems ingenious simple effective plans show Quadra original flew nicely cowl will accept almost currently available engines building Bills plans change would make use foam-core board some ribs formers rudder elevator cores already know Im hooked foam-core L-4B Grasshopper ubiquitous Piper Cub uniform Painted olive drab cabin windows extended behind wing used throughout WW II liaison observation aircraft Kens plans unusual can used modify existing kit Nosen Balsa USA manner builder selects cuts materials work kit sure make material changes indicated Kens plans Continued page 122 120 Model Aviation job heresonethatwill 37 Cu engine develops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitta straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty OMPLETE MODIFIED 37 ENGINE Lnul I. r.at ramoivgq Senu .ct MO COD UPS Add $400 shipping & Ia SCALE DOCUIVIENTATION SCALE DRAWHOTOS eOCKLETS IP REPLA-TECH 191 INTERNATIONAL CATALOGS $200 4SEOO MC KENZIE HWY VIDA OREGON 974B9
Edition: Model Aviation - 1981/08
Page Numbers: 36, 37, 116, 120
Couirol Scale Bob & Dolly Wischer 36 Model Aviation Weldon Smiths Bell RP-63G Kingcobrs 3 years making photo above little nameplate bythe nose wheel says airplane alive target Flown bya live pilot Fired atwith live ammunition explanation article Photo below shows engine room Super tigre 60 makes gobut note goodies displayed custom muffler exhausting through 24 scale stacks long extension shaftto front-mounted belt reduction-drive 4-bladed cooling fan air comes through wing root air inlets rear-mounted air tank reservoir airoperated wheel brakes Photo left shows interior superdetailed cockpit functional cranks doors raise lowerthe sidewindows Weldon flewone real ones 1 g44 example fabulous masterpieces appear Toledo FLYING TECHNIQUE Wisconsin winters usually shorten flying season six seven months long idle period frigid months gives us plenty time model building also results some loss proficiency during first flights spring Using trainer-type plane helps re-establish confidence early going rather risk newly-finished Scale model dwrn ml IfliS uresi LOKOS LI-lAm UUSrter caie ni sngines spans 80-in weighs 21 lb jim Funduks latest mind-boggler Precision Scale Vought F4U Corsair has air-operated folding wings inline-twin made two Dooling 619 on-board starter real centerof attention Toledo trainer may introduce false sense assurance however Its forgiving nature may permit us forget devastating result high angle attack flying Scale model higher wing loading especially during periods reduced speed such climbing gliding light trainer larger-than-necessary engine may lead us believe altitude can acquired touch UP elevator surpris ing number pilots both fuilsize modelers have mistaken notion throttle speed control elevator controls altitude transmitter controls moved mechanically regard facts flight First step learningorunlearning process stop flying wide-open throttle Follow practice full-size planes using throttle position gives comfortable cruise speed set elevator trim control permit level flight wings angle attack speed will produce lift equal models weight Changing throttle position results climb descent important observation notice speed does change model climbs descends Without changing throttle position move elevator trim control UP elevator speed will reduced DOWN trim will increase speed observations air determine throttle altitude control elevator speed control Using two controls opposite manner can lead stalls spins crashes temptation pull nose up elevator stretching glide must resisted must agreed judging models attitude during glide distance pilot matter experience Because flying slowly its size doesnt change rapidly approaches head-on model appears losing altitude too rapidly touch throttle will slow descent gathering speed Adding too much throttle can cause model overshoot landing added DOWN elevator trim will result speed increase much same effect indication model about stall watch loss ofdirec Continued page 116 August1981 37 George Rose flew Curtiss Hawk p-BE last years Scale World Vito Tomeos HawKer ea 1-ury rD vii mu i n span Champs Ottawait took Best Show 1st Precision Scale won 1st Military Stand-off Scale Toledo year flown Toledo year truly magnificent model the 1980 Nats Note scale 5-bladed prop MIDWEST PRODUCTS COMPANY INC 4005 IndIana St Hobart IndIana 46342 219942-1134 send 1Ofl catalon KIORITZ ENiINES BY GIBBS HOBBY & RESEAI Original Developer Factory Trained Authorized Master Service Dealer Year Limited LnlJ Pre-Onhied Props Avail Ask About Custom- Built KIORITZ Engines Deep Fins Optimum Cooling 21/4 Flywheel Small Magneto 1 5/am Six Bolt Aluminum Hub Carb Needles &Throttle Accessible Engine Running IDon Godfrey 722-1765 Points Sealed Rear Housing $19995 pay shIp pre-pald orders Mufflers Now Availablel DEALERS WELCOME SPECIFICATIONS 242 Co 397ccWalbro Potnp CabSaii Reanogs Crank 32HP t 8000 ~3 Ring PistonCaged Rollers Rod Piston Pin Weight 64 lb GIBBS HOBBY & RESEARCH 6195 Hillfield St NW N CANTON OHIO 44720 Phone 216 499-8854 after 600 PM STOP-A-PROP BRAKES GEE BEE Z T-SHIRTA-ATDBrakeKltno 1O1$275 Attractive Black OnFAI CABBrake Kit no 102 $325 Yellow Poly/CottonB ke Kit no 103 Se Sizes SML1 ea size $8503 FAI size $850 Thsnd$1 PostAdaptor Kit$150 force coefficients themselves related other parameters may vary scale such Reynolds number Mach number disregard variations also disregard effect altitude air density can relate models ratio Ww full-size airplanes ratio NW through formula VS quation 4 Ww models wing loading can related full-size airplane directly through use formula information concerning ratio maneuver force weight ratio see Eq 3 w WV2 LW EquationS Sv2 NS Noting now S N2s just due static scaiing model weight full-size weight realted other via formula wN3 WEquation 6 Eq 5 presented graphically Fig 3 Eq 6 Fig 4 Equations 3 and6 relate speed weight model speed weight full-size airplane true dynamic scaie modeL will now consider final force ratio namely thrust/weight simplest ratios because must require models thrust/weight equal full-size airplanes thrust/weight leads simple formula wW combined Eq 6 models thrust full-size airplanes thrust related through equation 1 N3 T next series three articles laws dynamic scale will compared flyable K/C model constraints determine general relationships between two get feel types airplanes suitable candidates true dynamic scale models RC Scale/Wischers Continued page 37 tonal control nose begins wander side model may near stall point nose should lowered Sudden application throttle stall point avoided can precipitate fatal snap roll due engine torque Lowering nose will add bit speed after small increase throttle can used regain height lost due close appraoach stall Opening throttle first will merely reduce rate descent little effect impending stall predictable approach path best obtained using DOWN elevator trim keep speed well above stalling Large amounts UP elevator must reserved instant needed landing flare Too early will kill off speed required reach ground safely landing under windy conditions little additional speed recommended keep glide path being upset due turbulence can also predicted wind speed will constant way down surface Expect lessening wind caused friction earth obstructions Keep little extra speed avoid situation bottom drops out suddenlyjust model about flare its landing classic example Scale model accident snap roll takeoff Best insurance against often-fatal mishap control angle attack using bit DOWN elevator trim let model gather adequate speed before lifting off just touch UP elevator prepared release elevator instant nodel breaks surface lifts off too early two ingredients snap roll present low airspeed UP elevator As landing experience needed judging airspeed keep takeoff straight line prefer stand behind model point easy judge speed nosewheel model predictable takeoff run permits pilot stand side better observation acceleration third element surprise snap roll takeoff tail heaviness Check center gravity location carefully follow example other Scale modelers use much weight necessary place center proper location An error nose-heavy side preferred Planies Toledo As past years centers attention Toledo exhibit Jim Funduk year F4U Corsair threeyear project air-operated folding wings attracted constant interest plane numer ous other features some hidden Jim com bined two Dooling 61 engines connected in-line using Webra carburetor basic fuselage fiberglass 006-in aluminum cover Rudder elevator silk covered Trim tabs flaps operational hatches wings opened expose machine guns Best-of-show first place Precision Scale awards won George Rose well known Curtiss Hawk P-6E same plane has doing well contest circuit including second place recent World Championship Ottawa Georges first attendance Toledo prototype Hawk located Daytons Air Force Museum five-year-old model looks better ever refreshing see well-flown model winner Toledo Expo non-flying types radio installed have too often taken top prizes Second place Precision Scale won Weldon Smiths Bell RP-63GKingcobra target plane Now retired airline captain Weldon flown prototype ferry pilot 1944 Buffalo NY factory Texas Several hun dred target planes built guns omitted ton armor added protect against fire gunners simulated attacks air combat Thats right live ammunition fired plane live pilot visitor show Art Johnson pilots fly missions Art will remembered modeler flies P-38 P-40 P-82 Nats other events Weldon Art introduced spent happy half-hour listening stories about plane Art told RP-63G could withstand 30 caliber fire tried rifle denting surface finding soft spot penetrating through windshield remembers bullets finding way inside including cockpit well some rattled around inside air intakes wing root plane lights would flash target hit Getting back Weldons model plane quite large 84-in wingspan has Supertigre 60 engine mounted scale location mid ship 24 functional exhaust pipes leading its mufflers long shaft scale location extends nose 25-to-i reduction lowers prop speed Weldon now has Rossi 90 ready installation 60 proves insufficient Continued page 120 116 Model Aviation Finish international orange butyrate dope flattener added over silkspan complete fuselage top cockpit removeable access engine drive train Weldon has made electric retract mechanisms operational sprung landing gear legs reservoir supplies air bladder wheel brakes cockpit well detailed including operating hand cranks lowering side windows Unquestionably fine example Precision Scale Giant Scale class 18 lb Vito Tomeos scratch-built 1/6-scale Hawker Sea Fury first place winner Military Stand-off class seen 18 lb 77-in span model flight last years Nats Dennis Bryll placed second P-47 Thunderbolt Third place Stand-off winner anotherfamiliar plane having won first place 77 80 Nats P-6 1 Black Widow Roger Brennom 195 lb plane scratch-built Wylam drawings foam balsa construction Hobbypoxy finish Three hand-made nonretractable gear legs have two springs Roger has recently installed new OS 60 engines seems well-tried flying planes making appearance Toledo Non military Stand-off Scale Starduster Too Terry Williams awarded first place Team Selection proposal has made select three Scale Teams Seguin Nats F4C Radio Control F4B Control-line Stand-off Radio Control though nation making bid 1982 World Champ ionship has USSR have elected omit Stand-off RC being proposed basis another nation may make attractive bid 1982 would include Stand off RC preparations must made send team eventuality Therefore modelers wish have entries considered three classes must have FAI stamp AMA licenses must pay FAI entry fee addition Nats entry fee must enter model complies FAI rules should noted FAI designation event Stand-off RC Scale US called RC Sport Scale no other nation makes successful bid 1982 World Championship FAI plenary session December USSR bid accepted refunds FAI program entry fee will made AMA headquarters upon appli cation Sport Scale RC Nats contestants serious effort being made least other nation outbid USSR Stand-off RC can included present far popular Scale event nations except USSR certainly deserves World Cham pionship status Bob andDolly Wischer Rt 1 S-22lLapham Peak Roa4 Delafiel4 WI 53018 RC Aerobatics/Van Putte Continued page 41 7Z transmitter because great sticks convenient trim pot locations So made compromise bought Ace Silver Seven encoder kit replace Kraft encoder As usual Fred Marks has done fine job Ace developing kit instructions assembly adjustment troubleshooting Ace suggests experienced kit build ers attempt retrofit encoder another transmitter However Ive experience assembling Ace Royal servo kits trouble shooting servo problems building Royal re ceiver installing dual rate switches KP-7Z transmitter Consequently lam optimis tic half-vast experience will carry through job course intend thing instructions say thoroughly read what George Myers wrote column Silver Seven transmitter August 1980 is6ue Model Aviation things work out well youll hear about what great job did dont work out Ill probably forget mention Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Giant Scale/Beckman Continued page 43 indicates commercial props 18-10 size will deliver 20 25 lb thrust 8000 rpm Its no wonder prop pulls Wendells Skybolt good authority whole subject propellers has become fascinating hadnt really put much thought started engine project quickly became apparent testing props much engines variables involved impossible really cover everything properly space well have available going through tremendous learning process ourselves just hope will able pass along Plan reviews month reviewing two plans available Taylorcraft Ltd have around about two years first saw prototypes Bill Wendts Fokker DVIII Ken Runestrands L-4B Morgan Hill 1979 first Giant Scale Fly-in literaly overwhelmed new impressions information two birds stood out Bills DVIII built scale sounds odd US modelers 1 ft 1 meter alittlelessthan one-third scale Bill worked European drawings metric dimensions easier converting exact one-third scale plans three sheets approxi mately 3 ft 6 ft clear easily read contain fair amount detail dont have much detail control surface hinging control hook-up however dont have experience area youll need some help obvious aircraft designed big bangers mind Materials construc tion techniques rugged Basic structures spruce plywood some balsa mostly weight critical wing employs beautiful set box spars built up -in square spruce 1/32-in ply wing separates center both wing locking strut attachment systems ingenious simple effective plans show Quadra original flew nicely cowl will accept almost currently available engines building Bills plans change would make use foam-core board some ribs formers rudder elevator cores already know Im hooked foam-core L-4B Grasshopper ubiquitous Piper Cub uniform Painted olive drab cabin windows extended behind wing used throughout WW II liaison observation aircraft Kens plans unusual can used modify existing kit Nosen Balsa USA manner builder selects cuts materials work kit sure make material changes indicated Kens plans Continued page 122 120 Model Aviation job heresonethatwill 37 Cu engine develops almost 4 hp yet weighs pound over Quadra has power pull Byron Pitta straight upwithout prop reduction also takes no space Quadrait will fit entirely inside cowl Nosen D unexposed stripped chain-saw motor engine manufactured USA miniature aircraft use Comes complete ready run year 100% warranty OMPLETE MODIFIED 37 ENGINE Lnul I. r.at ramoivgq Senu .ct MO COD UPS Add $400 shipping & Ia SCALE DOCUIVIENTATION SCALE DRAWHOTOS eOCKLETS IP REPLA-TECH 191 INTERNATIONAL CATALOGS $200 4SEOO MC KENZIE HWY VIDA OREGON 974B9