Radio Control Sca1e Bob8eDollyWiSCher PRACTICE PLANES scale mod elers use training pattern planes practice flying Precision Scale plane may take 2000 hours build over period five years too valuable risk day weekend sport flying have used scale planes kind flying inevitably begin show scuffs nicks hangar rash means repairs often easily disguised important use practice plane has flight characteristics similar scale model necessarily identi cal switch scale job will hold no great surprises low-wing scale plane sport counterpart could popular pattern planes Like scale modelers find lack scale realism pat tern ships slightly offensive therefore modify its appearance suit tastes Possibly changes drastic enough pattern plane would no longer competitive flown pattern contest purpose building plane What need some thing will fly reasonably similar manner scale plane enough scale-like appeal satisfy scale egos purpose recently designed built practice plane borrows its shape combination European types Piel Beryl Frati Falco well American Mooney Mite see insist model some thing find hard believe scale trike retract-geared ship can shoot spot landings repeatedly shrug off occasional scuffed wing tip bothering patch biplane types hard beat practice plane built kit such Lou Andrews Aeromaster famous plane has often modified give satisfac tory scale appearance will easily absorb abuse frequent flights effort involved construction little compared scale model can considered nearly expendable practice-type planes may able much air scale planes acrobatic capabilities definite asset confidence building Knowing handle plane unusual attitudes goes long way toward saving super-scale plane has upset unexpected gust has snap-rolled incipient spin due its having built over-weight benefits frequent prac tice sessions cannot over-emphasized uncommon full-scale pilots take some acrobatic training will prepared take proper action planes unexpected due weather wake turbulence first rented parachutes almost 40 years ago practice self-taught aerobatics Taylorcraft presumed reason Actually did enjoyment chutes useless nonsense T-Craft doors hinged front couldnt opened against strong slip-stream Because Precision Scale planes make 20 30 flights year some times derisively called closet queens~ something kept hidden except occasional flights until contest comes along use term lose inter est flight becomes evident Continued page 101 December 1978 25 Eight-foot Curtiss Jenny Nosen kit built Allan Goldberg Silk-and-Aerogloss-covered ship weighs 12 lbs including 3 lbs lead nose flown Ross Twin 60 glow heat using two ni cad batteries low throttle beautiful project Photo Goldberg Bill Seidler flies 69-in Travel Air D40 Webra 90 16-4-1/2 prop Ten-lb scratchbuilt ship Super Coverite covered 3 coats clear nitrate Hobbypoxy Seidler photo Gee Bee H-1/R-Z Henry tlatffce parlcefl near mactory wnere uee Bees produced 56-in model stable flier B lbs Enya 60 yields 98 mph 12-6 prop Photo Heffice rirs uaiias pofl Scale meet went Ernie Harwood shown tuning engine Avro Tutor Highest static flight scores Randolph pic elevator just enough throttle remain airborne still answer ailerons good 20 will enhance vertical per formance other worth trouble See later Im going flitting RC Scale Wischers continued page 25 didnt crash takeoff surest way us convince other modelers try hands scale prevent ac cidents being well practiced other planes before attempting flights scale models often heard excuse scale planes hard fly easily damaged crashed no longer valid Scale Wheels avid scale buffs have making own tires complete side-wall lettering number years first saw Toledo DeHavilland Hornet built Dario Bris ighella displayed machined mold ing dies used form tires silicone rubber Woodvale World Champion ships first-place winning Fournier Mick Reeves also hand-made tire its single landing wheel complete legible lettering side walls Mick used silicone rubber rather thick section support weight lettering scale size quite small therefore difficult engrave mold ing die example exten sive effort required world class model effect rule states FAI contest entrant must make declaration items used plane made builder planes wheels tires appear list parts quite often parts purchased FAI Precision Scale possible detail made builder Robart now producing Universal Scale Wheels lettering side walls Hubs molded high strength Lexan Tires low rebound thermoplas tic rubber Continental Deutsches Fabrikat 690 side wingfoot insignia Goodyear Weather 32 X 8 Airplane other side using wheels have found necessary maximum realism remove gloss tire material happens naturally age user may wish hasten process buffing fine sandpaper rubbing very gently cloth moistened dope thinner Robart now furnishes instructions three alternative methods inflating tires withstand load heavier scale models include use dry ice Alka Seltzer pressurizing agents Also described old method refrigerat ing wheel cause contraction air sealing screws loosened screws rapidly tightened trapped air expands room temperature pressurize tire hub discs furnished Robart can modified closely resemble pro totype wheels reworking center disc can removed drill ing filing leave rim new disc plywood styrene plastic epoxied back give depth hub disc Small bits tubing hex screw heads epoxied place ideal use new Hobbypoxy Thixotropic Epoxy Glue stays put applied does run discs painted dull aluminum Floquil resemble wheel castings prototype appearance improvement worthwhile Sport Scale plane detail can seen distance problem have Robart tires flat spot occurs tires model stands position prolonged period solved mak ing balsa stand support plane axles remove load tires flat spot difficult remove model will bounce unrealistically taxiing flats persist Pressurizing helps round out flattened tire Another method suggested Mike Gretz stuff Robart tires firm poly foam preference frequent inflation have also used two sets wheels dis play other flying display tires stuffed balsa discs cut seg ments easy assembly would suitable flying very hard would absorb no landing shock Flap Effectiveness use flaps pro totype airplanes has become common almost model modern plane will likely use seems no agreement between modelers ef fect takeoff landing expe rience no surprise between similar planes effect flaps hard predict until plane flown plane complete disappointment seem have no effect whatever another plane definitely slowed flaps applied Very likely good explanation variation lack aerodynamic knowledge ob scures reason increase lift drag flaps lowered model flying near cruising speed crease lift will cause momentary climb ballooning same time ad ditional drag will slow plane cause steepening glide angle steeper angle modeler attempting spot landing advantage makes point touch-down predictable some planes additional effect increase stability flaps lowered plane seems find groove undisturbed wind conditions Having slowed drag controls become less effective small stick movements have less effect glide path Most advantages flaps fullscale planes small consequence model especially true flaps used takeoff no good reason increase drag models require increase lift except four-engine 120-pound monsters marginal power have seen recently addition flaps actu ating mechanism servo adds large amount weight model could very well nullify benefits derived use trim change flaps lowered could source problems time least appreciated especially true contest judges ask December 1978 101 AM Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST R/C BASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Mode4 Co Inc US ftte 1& North St Topsfjeld Mass 01983 887-8541 Support AMA Price $3995 kit per dollar bar em m ATTENTION COLD WEATHER Ageo qI o SRRSPosSl SOhood og Addoddtooo 51 5 o codJ _____ MITT FOR YOUR HANDS AND YOUR BEDT FRIEND YOUR I THE ORIGINAL FUR LINED CORDUORY PROTECTOR RADIOIITHASACLEARFLADTICAINOOA FOR COMPLETE VIEW OF CONTROLS ADJUSTARLE TAR SO ALL RADIOS WILL FIT DOUARE CONSTRUCTION FOR TROURLE FREE CONTROL -IANDLING YOU WILL BE THE ELVY OF ALL YOUR FROST BITTEN FRIENDS L Deod check o 00evOR 0 M 255 Woppo RoodMS B ow woweeks low level fly-by flap demonstration have yet seen model using Fowler flaps employed modern jet airliners increase wing area well effective change angle incidence model using such flaps would likely quite large flaps could effective FAI Scale Meeting Woodvale Scale World Championships meeting ClAM Scale Subcommittee called chairman Helmut Zeigler discuss following items I No downgrading realism flight would occur because visible re ceiver antenna unless spoiled planes appearance drastically 2 A plane damaged during flight could repaired group rather builder alone violating builder model rule cause reasoned plane already static judged 3 Electric starters carried plane actuated radio signal would awarded points engine starting ground unless starter constructed contestant Restarting engine air would eligible receiving score normally done prototype such Fournier Ryson powered gliders final decision ground starts would rest judges contest 4 The rule require ten-second straight flight will amended starting point maneuver need over landing circle avoids problem very fast plane going out sight ten sec onds 5 The judges should have right require contestant demonstrate retracting landing gear air full view operation dif ficult see plane distance after takeoff judges should aware cycle time time lag between retracting gear legs 6 In calling maneuvers landing need called separately unless emergency such occurs engine dies 7 The question definition biplane scoring under new complexity bonus system would left judges stub wing very small wing sesquiplane would make plane biplane true sense Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 24 48 all C2 100 pf disc occasion ally lost track middle multi-step instruction neglected steps Consequently care needs taken ended up marking off individual components installed As almost kit Ive ever sembled parts missing absence transistor two resistors aggravating since anxious try out new toy However Royal quickly sent missing parts formed Pro Tach works perfectly coin phrase flew right off drawing board Calibration five-minute job short other minor changes instructions better quality control parts packaging improvement Royal Pro Tach can think re duce $5995 price tag modelers can afford once get letter fellow modeler makes envious such case letter Bill Kaiser San Francisco Bill has imag ination versatility us wish Bills letter end article Sept 78 issue Model viat ion mentioned 6-foot canard have 6-foot aerobatic canard using Ridge Runner wings have flying year now also referred having 6-foot wings until someone mentioned should name glider Two Yard Canard fly glider off slope horizontal stabilizer front 24 wide elevator flap being 1 wide front stabilizer rubber-band tached has never badly damaged am always looking something teresting different fly off slope have successful hang-glider Regallo wing made aluminum tubing dacron has standard fuselage under rudder elevator control bar attached top fuselage regular wing position keel rear Regallo wing fastened top strengthened vertical fin have radio controlled blimp 9-feet long has electric motor Ra dio Shop special rear 6-foot fuselage hangs under blimp electric motor swivels up down left right blimp will turn practically around itself goes 102 Model Aviation walking speed electric motor runs about 45 minutes 550-MAH battery pack Receiver two servos run off 450-MAH battery electric motor operates transmitter stick moved up down also have threewheeled land sailer winch jib sails wrote Bill requesting additional details pictures fascinating vari ety models hope share antic ipation reading seeing him Several people pointed out manda tory zero engine failure after takeoff announced really deleted published list mandatory zeros alleged September issue mandatory zero Engine running throughout maneuvers except Spin Approach Landing covers situation engine failure during takeoff Apparently people know 1978 Nats radio control aerobatics events planned run Na tional Society Radio Controlled Aero batics NSRCA people can take credit best run RC aerobatics Nats history Thats just opinion either seasoned Nats competitors delighted improved flight line efficiency especially rapid tabulation posting results permitted competitor see results score board within minutes completion flight NSRCA has come long way improving aerobatic competition have long way go advan tage pattern competitors NSRCA members hope non-members will send membership dues hardworking Mrs Sally Brown NSRCA Secretary/Treasurer 8534 Huddleston Dr Cincinnati OH 45236 sure list address AMA number Also enclose check $6 1978 Dues 1979 will $10 live Alabama Arkansas Florida Georgia Louisiana Mississippi Tennessee NSRCA member may interested hear just appointed NSRCA Vice President District 3 includes states Dick McGraw former VP forced give up job business health reasons Please let hear does commercial go Something like name like Fritzers its got good Well name like Hobby poxy thixatropic epoxy glue its got goodand Hobbypoxys new mula 3 glue thick resists running vertical surfaces made perfect installing firewall new Phoenix 8 fuselage Aero Composites Phoenix 8 fuselage epoxy/glass epoxy glues recommended rather polyester glues Since have never happy mixing different powders glues o make paste thick enough form decent
Edition: Model Aviation - 1978/12
Page Numbers: 25, 101, 102
Radio Control Sca1e Bob8eDollyWiSCher PRACTICE PLANES scale mod elers use training pattern planes practice flying Precision Scale plane may take 2000 hours build over period five years too valuable risk day weekend sport flying have used scale planes kind flying inevitably begin show scuffs nicks hangar rash means repairs often easily disguised important use practice plane has flight characteristics similar scale model necessarily identi cal switch scale job will hold no great surprises low-wing scale plane sport counterpart could popular pattern planes Like scale modelers find lack scale realism pat tern ships slightly offensive therefore modify its appearance suit tastes Possibly changes drastic enough pattern plane would no longer competitive flown pattern contest purpose building plane What need some thing will fly reasonably similar manner scale plane enough scale-like appeal satisfy scale egos purpose recently designed built practice plane borrows its shape combination European types Piel Beryl Frati Falco well American Mooney Mite see insist model some thing find hard believe scale trike retract-geared ship can shoot spot landings repeatedly shrug off occasional scuffed wing tip bothering patch biplane types hard beat practice plane built kit such Lou Andrews Aeromaster famous plane has often modified give satisfac tory scale appearance will easily absorb abuse frequent flights effort involved construction little compared scale model can considered nearly expendable practice-type planes may able much air scale planes acrobatic capabilities definite asset confidence building Knowing handle plane unusual attitudes goes long way toward saving super-scale plane has upset unexpected gust has snap-rolled incipient spin due its having built over-weight benefits frequent prac tice sessions cannot over-emphasized uncommon full-scale pilots take some acrobatic training will prepared take proper action planes unexpected due weather wake turbulence first rented parachutes almost 40 years ago practice self-taught aerobatics Taylorcraft presumed reason Actually did enjoyment chutes useless nonsense T-Craft doors hinged front couldnt opened against strong slip-stream Because Precision Scale planes make 20 30 flights year some times derisively called closet queens~ something kept hidden except occasional flights until contest comes along use term lose inter est flight becomes evident Continued page 101 December 1978 25 Eight-foot Curtiss Jenny Nosen kit built Allan Goldberg Silk-and-Aerogloss-covered ship weighs 12 lbs including 3 lbs lead nose flown Ross Twin 60 glow heat using two ni cad batteries low throttle beautiful project Photo Goldberg Bill Seidler flies 69-in Travel Air D40 Webra 90 16-4-1/2 prop Ten-lb scratchbuilt ship Super Coverite covered 3 coats clear nitrate Hobbypoxy Seidler photo Gee Bee H-1/R-Z Henry tlatffce parlcefl near mactory wnere uee Bees produced 56-in model stable flier B lbs Enya 60 yields 98 mph 12-6 prop Photo Heffice rirs uaiias pofl Scale meet went Ernie Harwood shown tuning engine Avro Tutor Highest static flight scores Randolph pic elevator just enough throttle remain airborne still answer ailerons good 20 will enhance vertical per formance other worth trouble See later Im going flitting RC Scale Wischers continued page 25 didnt crash takeoff surest way us convince other modelers try hands scale prevent ac cidents being well practiced other planes before attempting flights scale models often heard excuse scale planes hard fly easily damaged crashed no longer valid Scale Wheels avid scale buffs have making own tires complete side-wall lettering number years first saw Toledo DeHavilland Hornet built Dario Bris ighella displayed machined mold ing dies used form tires silicone rubber Woodvale World Champion ships first-place winning Fournier Mick Reeves also hand-made tire its single landing wheel complete legible lettering side walls Mick used silicone rubber rather thick section support weight lettering scale size quite small therefore difficult engrave mold ing die example exten sive effort required world class model effect rule states FAI contest entrant must make declaration items used plane made builder planes wheels tires appear list parts quite often parts purchased FAI Precision Scale possible detail made builder Robart now producing Universal Scale Wheels lettering side walls Hubs molded high strength Lexan Tires low rebound thermoplas tic rubber Continental Deutsches Fabrikat 690 side wingfoot insignia Goodyear Weather 32 X 8 Airplane other side using wheels have found necessary maximum realism remove gloss tire material happens naturally age user may wish hasten process buffing fine sandpaper rubbing very gently cloth moistened dope thinner Robart now furnishes instructions three alternative methods inflating tires withstand load heavier scale models include use dry ice Alka Seltzer pressurizing agents Also described old method refrigerat ing wheel cause contraction air sealing screws loosened screws rapidly tightened trapped air expands room temperature pressurize tire hub discs furnished Robart can modified closely resemble pro totype wheels reworking center disc can removed drill ing filing leave rim new disc plywood styrene plastic epoxied back give depth hub disc Small bits tubing hex screw heads epoxied place ideal use new Hobbypoxy Thixotropic Epoxy Glue stays put applied does run discs painted dull aluminum Floquil resemble wheel castings prototype appearance improvement worthwhile Sport Scale plane detail can seen distance problem have Robart tires flat spot occurs tires model stands position prolonged period solved mak ing balsa stand support plane axles remove load tires flat spot difficult remove model will bounce unrealistically taxiing flats persist Pressurizing helps round out flattened tire Another method suggested Mike Gretz stuff Robart tires firm poly foam preference frequent inflation have also used two sets wheels dis play other flying display tires stuffed balsa discs cut seg ments easy assembly would suitable flying very hard would absorb no landing shock Flap Effectiveness use flaps pro totype airplanes has become common almost model modern plane will likely use seems no agreement between modelers ef fect takeoff landing expe rience no surprise between similar planes effect flaps hard predict until plane flown plane complete disappointment seem have no effect whatever another plane definitely slowed flaps applied Very likely good explanation variation lack aerodynamic knowledge ob scures reason increase lift drag flaps lowered model flying near cruising speed crease lift will cause momentary climb ballooning same time ad ditional drag will slow plane cause steepening glide angle steeper angle modeler attempting spot landing advantage makes point touch-down predictable some planes additional effect increase stability flaps lowered plane seems find groove undisturbed wind conditions Having slowed drag controls become less effective small stick movements have less effect glide path Most advantages flaps fullscale planes small consequence model especially true flaps used takeoff no good reason increase drag models require increase lift except four-engine 120-pound monsters marginal power have seen recently addition flaps actu ating mechanism servo adds large amount weight model could very well nullify benefits derived use trim change flaps lowered could source problems time least appreciated especially true contest judges ask December 1978 101 AM Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST R/C BASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Mode4 Co Inc US ftte 1& North St Topsfjeld Mass 01983 887-8541 Support AMA Price $3995 kit per dollar bar em m ATTENTION COLD WEATHER Ageo qI o SRRSPosSl SOhood og Addoddtooo 51 5 o codJ _____ MITT FOR YOUR HANDS AND YOUR BEDT FRIEND YOUR I THE ORIGINAL FUR LINED CORDUORY PROTECTOR RADIOIITHASACLEARFLADTICAINOOA FOR COMPLETE VIEW OF CONTROLS ADJUSTARLE TAR SO ALL RADIOS WILL FIT DOUARE CONSTRUCTION FOR TROURLE FREE CONTROL -IANDLING YOU WILL BE THE ELVY OF ALL YOUR FROST BITTEN FRIENDS L Deod check o 00evOR 0 M 255 Woppo RoodMS B ow woweeks low level fly-by flap demonstration have yet seen model using Fowler flaps employed modern jet airliners increase wing area well effective change angle incidence model using such flaps would likely quite large flaps could effective FAI Scale Meeting Woodvale Scale World Championships meeting ClAM Scale Subcommittee called chairman Helmut Zeigler discuss following items I No downgrading realism flight would occur because visible re ceiver antenna unless spoiled planes appearance drastically 2 A plane damaged during flight could repaired group rather builder alone violating builder model rule cause reasoned plane already static judged 3 Electric starters carried plane actuated radio signal would awarded points engine starting ground unless starter constructed contestant Restarting engine air would eligible receiving score normally done prototype such Fournier Ryson powered gliders final decision ground starts would rest judges contest 4 The rule require ten-second straight flight will amended starting point maneuver need over landing circle avoids problem very fast plane going out sight ten sec onds 5 The judges should have right require contestant demonstrate retracting landing gear air full view operation dif ficult see plane distance after takeoff judges should aware cycle time time lag between retracting gear legs 6 In calling maneuvers landing need called separately unless emergency such occurs engine dies 7 The question definition biplane scoring under new complexity bonus system would left judges stub wing very small wing sesquiplane would make plane biplane true sense Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 24 48 all C2 100 pf disc occasion ally lost track middle multi-step instruction neglected steps Consequently care needs taken ended up marking off individual components installed As almost kit Ive ever sembled parts missing absence transistor two resistors aggravating since anxious try out new toy However Royal quickly sent missing parts formed Pro Tach works perfectly coin phrase flew right off drawing board Calibration five-minute job short other minor changes instructions better quality control parts packaging improvement Royal Pro Tach can think re duce $5995 price tag modelers can afford once get letter fellow modeler makes envious such case letter Bill Kaiser San Francisco Bill has imag ination versatility us wish Bills letter end article Sept 78 issue Model viat ion mentioned 6-foot canard have 6-foot aerobatic canard using Ridge Runner wings have flying year now also referred having 6-foot wings until someone mentioned should name glider Two Yard Canard fly glider off slope horizontal stabilizer front 24 wide elevator flap being 1 wide front stabilizer rubber-band tached has never badly damaged am always looking something teresting different fly off slope have successful hang-glider Regallo wing made aluminum tubing dacron has standard fuselage under rudder elevator control bar attached top fuselage regular wing position keel rear Regallo wing fastened top strengthened vertical fin have radio controlled blimp 9-feet long has electric motor Ra dio Shop special rear 6-foot fuselage hangs under blimp electric motor swivels up down left right blimp will turn practically around itself goes 102 Model Aviation walking speed electric motor runs about 45 minutes 550-MAH battery pack Receiver two servos run off 450-MAH battery electric motor operates transmitter stick moved up down also have threewheeled land sailer winch jib sails wrote Bill requesting additional details pictures fascinating vari ety models hope share antic ipation reading seeing him Several people pointed out manda tory zero engine failure after takeoff announced really deleted published list mandatory zeros alleged September issue mandatory zero Engine running throughout maneuvers except Spin Approach Landing covers situation engine failure during takeoff Apparently people know 1978 Nats radio control aerobatics events planned run Na tional Society Radio Controlled Aero batics NSRCA people can take credit best run RC aerobatics Nats history Thats just opinion either seasoned Nats competitors delighted improved flight line efficiency especially rapid tabulation posting results permitted competitor see results score board within minutes completion flight NSRCA has come long way improving aerobatic competition have long way go advan tage pattern competitors NSRCA members hope non-members will send membership dues hardworking Mrs Sally Brown NSRCA Secretary/Treasurer 8534 Huddleston Dr Cincinnati OH 45236 sure list address AMA number Also enclose check $6 1978 Dues 1979 will $10 live Alabama Arkansas Florida Georgia Louisiana Mississippi Tennessee NSRCA member may interested hear just appointed NSRCA Vice President District 3 includes states Dick McGraw former VP forced give up job business health reasons Please let hear does commercial go Something like name like Fritzers its got good Well name like Hobby poxy thixatropic epoxy glue its got goodand Hobbypoxys new mula 3 glue thick resists running vertical surfaces made perfect installing firewall new Phoenix 8 fuselage Aero Composites Phoenix 8 fuselage epoxy/glass epoxy glues recommended rather polyester glues Since have never happy mixing different powders glues o make paste thick enough form decent
Edition: Model Aviation - 1978/12
Page Numbers: 25, 101, 102
Radio Control Sca1e Bob8eDollyWiSCher PRACTICE PLANES scale mod elers use training pattern planes practice flying Precision Scale plane may take 2000 hours build over period five years too valuable risk day weekend sport flying have used scale planes kind flying inevitably begin show scuffs nicks hangar rash means repairs often easily disguised important use practice plane has flight characteristics similar scale model necessarily identi cal switch scale job will hold no great surprises low-wing scale plane sport counterpart could popular pattern planes Like scale modelers find lack scale realism pat tern ships slightly offensive therefore modify its appearance suit tastes Possibly changes drastic enough pattern plane would no longer competitive flown pattern contest purpose building plane What need some thing will fly reasonably similar manner scale plane enough scale-like appeal satisfy scale egos purpose recently designed built practice plane borrows its shape combination European types Piel Beryl Frati Falco well American Mooney Mite see insist model some thing find hard believe scale trike retract-geared ship can shoot spot landings repeatedly shrug off occasional scuffed wing tip bothering patch biplane types hard beat practice plane built kit such Lou Andrews Aeromaster famous plane has often modified give satisfac tory scale appearance will easily absorb abuse frequent flights effort involved construction little compared scale model can considered nearly expendable practice-type planes may able much air scale planes acrobatic capabilities definite asset confidence building Knowing handle plane unusual attitudes goes long way toward saving super-scale plane has upset unexpected gust has snap-rolled incipient spin due its having built over-weight benefits frequent prac tice sessions cannot over-emphasized uncommon full-scale pilots take some acrobatic training will prepared take proper action planes unexpected due weather wake turbulence first rented parachutes almost 40 years ago practice self-taught aerobatics Taylorcraft presumed reason Actually did enjoyment chutes useless nonsense T-Craft doors hinged front couldnt opened against strong slip-stream Because Precision Scale planes make 20 30 flights year some times derisively called closet queens~ something kept hidden except occasional flights until contest comes along use term lose inter est flight becomes evident Continued page 101 December 1978 25 Eight-foot Curtiss Jenny Nosen kit built Allan Goldberg Silk-and-Aerogloss-covered ship weighs 12 lbs including 3 lbs lead nose flown Ross Twin 60 glow heat using two ni cad batteries low throttle beautiful project Photo Goldberg Bill Seidler flies 69-in Travel Air D40 Webra 90 16-4-1/2 prop Ten-lb scratchbuilt ship Super Coverite covered 3 coats clear nitrate Hobbypoxy Seidler photo Gee Bee H-1/R-Z Henry tlatffce parlcefl near mactory wnere uee Bees produced 56-in model stable flier B lbs Enya 60 yields 98 mph 12-6 prop Photo Heffice rirs uaiias pofl Scale meet went Ernie Harwood shown tuning engine Avro Tutor Highest static flight scores Randolph pic elevator just enough throttle remain airborne still answer ailerons good 20 will enhance vertical per formance other worth trouble See later Im going flitting RC Scale Wischers continued page 25 didnt crash takeoff surest way us convince other modelers try hands scale prevent ac cidents being well practiced other planes before attempting flights scale models often heard excuse scale planes hard fly easily damaged crashed no longer valid Scale Wheels avid scale buffs have making own tires complete side-wall lettering number years first saw Toledo DeHavilland Hornet built Dario Bris ighella displayed machined mold ing dies used form tires silicone rubber Woodvale World Champion ships first-place winning Fournier Mick Reeves also hand-made tire its single landing wheel complete legible lettering side walls Mick used silicone rubber rather thick section support weight lettering scale size quite small therefore difficult engrave mold ing die example exten sive effort required world class model effect rule states FAI contest entrant must make declaration items used plane made builder planes wheels tires appear list parts quite often parts purchased FAI Precision Scale possible detail made builder Robart now producing Universal Scale Wheels lettering side walls Hubs molded high strength Lexan Tires low rebound thermoplas tic rubber Continental Deutsches Fabrikat 690 side wingfoot insignia Goodyear Weather 32 X 8 Airplane other side using wheels have found necessary maximum realism remove gloss tire material happens naturally age user may wish hasten process buffing fine sandpaper rubbing very gently cloth moistened dope thinner Robart now furnishes instructions three alternative methods inflating tires withstand load heavier scale models include use dry ice Alka Seltzer pressurizing agents Also described old method refrigerat ing wheel cause contraction air sealing screws loosened screws rapidly tightened trapped air expands room temperature pressurize tire hub discs furnished Robart can modified closely resemble pro totype wheels reworking center disc can removed drill ing filing leave rim new disc plywood styrene plastic epoxied back give depth hub disc Small bits tubing hex screw heads epoxied place ideal use new Hobbypoxy Thixotropic Epoxy Glue stays put applied does run discs painted dull aluminum Floquil resemble wheel castings prototype appearance improvement worthwhile Sport Scale plane detail can seen distance problem have Robart tires flat spot occurs tires model stands position prolonged period solved mak ing balsa stand support plane axles remove load tires flat spot difficult remove model will bounce unrealistically taxiing flats persist Pressurizing helps round out flattened tire Another method suggested Mike Gretz stuff Robart tires firm poly foam preference frequent inflation have also used two sets wheels dis play other flying display tires stuffed balsa discs cut seg ments easy assembly would suitable flying very hard would absorb no landing shock Flap Effectiveness use flaps pro totype airplanes has become common almost model modern plane will likely use seems no agreement between modelers ef fect takeoff landing expe rience no surprise between similar planes effect flaps hard predict until plane flown plane complete disappointment seem have no effect whatever another plane definitely slowed flaps applied Very likely good explanation variation lack aerodynamic knowledge ob scures reason increase lift drag flaps lowered model flying near cruising speed crease lift will cause momentary climb ballooning same time ad ditional drag will slow plane cause steepening glide angle steeper angle modeler attempting spot landing advantage makes point touch-down predictable some planes additional effect increase stability flaps lowered plane seems find groove undisturbed wind conditions Having slowed drag controls become less effective small stick movements have less effect glide path Most advantages flaps fullscale planes small consequence model especially true flaps used takeoff no good reason increase drag models require increase lift except four-engine 120-pound monsters marginal power have seen recently addition flaps actu ating mechanism servo adds large amount weight model could very well nullify benefits derived use trim change flaps lowered could source problems time least appreciated especially true contest judges ask December 1978 101 AM Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST R/C BASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Mode4 Co Inc US ftte 1& North St Topsfjeld Mass 01983 887-8541 Support AMA Price $3995 kit per dollar bar em m ATTENTION COLD WEATHER Ageo qI o SRRSPosSl SOhood og Addoddtooo 51 5 o codJ _____ MITT FOR YOUR HANDS AND YOUR BEDT FRIEND YOUR I THE ORIGINAL FUR LINED CORDUORY PROTECTOR RADIOIITHASACLEARFLADTICAINOOA FOR COMPLETE VIEW OF CONTROLS ADJUSTARLE TAR SO ALL RADIOS WILL FIT DOUARE CONSTRUCTION FOR TROURLE FREE CONTROL -IANDLING YOU WILL BE THE ELVY OF ALL YOUR FROST BITTEN FRIENDS L Deod check o 00evOR 0 M 255 Woppo RoodMS B ow woweeks low level fly-by flap demonstration have yet seen model using Fowler flaps employed modern jet airliners increase wing area well effective change angle incidence model using such flaps would likely quite large flaps could effective FAI Scale Meeting Woodvale Scale World Championships meeting ClAM Scale Subcommittee called chairman Helmut Zeigler discuss following items I No downgrading realism flight would occur because visible re ceiver antenna unless spoiled planes appearance drastically 2 A plane damaged during flight could repaired group rather builder alone violating builder model rule cause reasoned plane already static judged 3 Electric starters carried plane actuated radio signal would awarded points engine starting ground unless starter constructed contestant Restarting engine air would eligible receiving score normally done prototype such Fournier Ryson powered gliders final decision ground starts would rest judges contest 4 The rule require ten-second straight flight will amended starting point maneuver need over landing circle avoids problem very fast plane going out sight ten sec onds 5 The judges should have right require contestant demonstrate retracting landing gear air full view operation dif ficult see plane distance after takeoff judges should aware cycle time time lag between retracting gear legs 6 In calling maneuvers landing need called separately unless emergency such occurs engine dies 7 The question definition biplane scoring under new complexity bonus system would left judges stub wing very small wing sesquiplane would make plane biplane true sense Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 24 48 all C2 100 pf disc occasion ally lost track middle multi-step instruction neglected steps Consequently care needs taken ended up marking off individual components installed As almost kit Ive ever sembled parts missing absence transistor two resistors aggravating since anxious try out new toy However Royal quickly sent missing parts formed Pro Tach works perfectly coin phrase flew right off drawing board Calibration five-minute job short other minor changes instructions better quality control parts packaging improvement Royal Pro Tach can think re duce $5995 price tag modelers can afford once get letter fellow modeler makes envious such case letter Bill Kaiser San Francisco Bill has imag ination versatility us wish Bills letter end article Sept 78 issue Model viat ion mentioned 6-foot canard have 6-foot aerobatic canard using Ridge Runner wings have flying year now also referred having 6-foot wings until someone mentioned should name glider Two Yard Canard fly glider off slope horizontal stabilizer front 24 wide elevator flap being 1 wide front stabilizer rubber-band tached has never badly damaged am always looking something teresting different fly off slope have successful hang-glider Regallo wing made aluminum tubing dacron has standard fuselage under rudder elevator control bar attached top fuselage regular wing position keel rear Regallo wing fastened top strengthened vertical fin have radio controlled blimp 9-feet long has electric motor Ra dio Shop special rear 6-foot fuselage hangs under blimp electric motor swivels up down left right blimp will turn practically around itself goes 102 Model Aviation walking speed electric motor runs about 45 minutes 550-MAH battery pack Receiver two servos run off 450-MAH battery electric motor operates transmitter stick moved up down also have threewheeled land sailer winch jib sails wrote Bill requesting additional details pictures fascinating vari ety models hope share antic ipation reading seeing him Several people pointed out manda tory zero engine failure after takeoff announced really deleted published list mandatory zeros alleged September issue mandatory zero Engine running throughout maneuvers except Spin Approach Landing covers situation engine failure during takeoff Apparently people know 1978 Nats radio control aerobatics events planned run Na tional Society Radio Controlled Aero batics NSRCA people can take credit best run RC aerobatics Nats history Thats just opinion either seasoned Nats competitors delighted improved flight line efficiency especially rapid tabulation posting results permitted competitor see results score board within minutes completion flight NSRCA has come long way improving aerobatic competition have long way go advan tage pattern competitors NSRCA members hope non-members will send membership dues hardworking Mrs Sally Brown NSRCA Secretary/Treasurer 8534 Huddleston Dr Cincinnati OH 45236 sure list address AMA number Also enclose check $6 1978 Dues 1979 will $10 live Alabama Arkansas Florida Georgia Louisiana Mississippi Tennessee NSRCA member may interested hear just appointed NSRCA Vice President District 3 includes states Dick McGraw former VP forced give up job business health reasons Please let hear does commercial go Something like name like Fritzers its got good Well name like Hobby poxy thixatropic epoxy glue its got goodand Hobbypoxys new mula 3 glue thick resists running vertical surfaces made perfect installing firewall new Phoenix 8 fuselage Aero Composites Phoenix 8 fuselage epoxy/glass epoxy glues recommended rather polyester glues Since have never happy mixing different powders glues o make paste thick enough form decent