Curtiss P-40 represented classic N American fighter aircraft onset World War II Influence racing airplanes 30s gave P-40 its good looks American Volunteer Group AVG painted shark mouth its defining logo P-40 became essence fighter publics mind purpose designing model create competitive machine has good degree charisma effect top-notch Stunters available stand out anything much different rest Scale model have taken consideration some details help define P-40K philosophy create illusion scale actually having scale observer has believe what he/she looking P-40 General shapes details color scheme complete illusion wing employs sweephack leading edge forward sweep flap hinge line Most conventionai Stunters taper leading edge two inches have straight flap hinge line P-40s j small bit taper leading edge two inches flap taper produces wing right proportions w creating illusion recognizable P-40K K variant chosen because P-40 pretty sweeping dorsal fin build E version simply straighten vertical fin leading edge chose AVG paint scheme because probably mostrecognizable design used P-40s shark mouth Chinese stars flying Tiger Hells Angel artwork help create illusion scale Another nice detail exhaust stacks Windy Urtnowski supplies cast resin available directly Windy $5 set aerodynamic properties design mainstream modem Stunt talked Paul Walker two years ago Northwest Control Line Championships Impact weighed 60 ounces 700 square inches wing area seemed like good goal shoot P-40K planned around figures Using lacquer 52 Model Aviation t Johnston Stars wing American Volunteer Group AVG Shark mouth gives P-40K its identity color coat added bit extra weight P-40K does tip scales 61 ounces first contest entered 1997 Northwest Control Line Championships P-40K did better expected frontrow appearance 20 points very generously awarded Stunt judges put very smooth flight total 500 points highest personal Stunt score P-40K very well received people expressing interest building own believe appeal semiscale Stunter will always greatlook Al Rabes Mustang Bearcat Sea Fury great Al Rabe has inspiration Stunt since 16 years old extra effort creating airplane noticeably resembles its full-scale counterpart provides greater interest spectators competitors CONSTRUCTION Engine first priority determine engine install started Double Star 60 Lite weighs two ounces less SuperTigre 60 An 11-ounce engine like DS 60 light tongue muffler six- seven-pound density balsa will get center gravity CG very close plan recommendations ST 60 chosen builder may consider reducing nose moment inch installing adjustable tail weight box Shortening nose may compromise tank room sure will enough room tank requirements use about six ounces fuel pattern ST 60 Other engines available 0S/Magnum 46 53 SuperTigre 51 Stalker 61 tuned-pipe setups used experts days Consult Stunt News Precision Aerobatics Model Pilots Association publication information about multitude Stunt engines available Airframe construction type techniques straightforward conventional some tricks Ive picked up have employed P-40K small things add up create better overall Stunter fuselage uses /32 balsa sides molded front deck rear turtledeck bottom sheeting Light balsa six- seven-pound density range should chosen rest construction supports 3A2 outer skin resulting strong stiff light fuselage 1/2 square maple engine mounts bridged /2 balsa epoxied crossgrained ties nose components together dampening vibration engines like ST 60 engine chosen noted its smooth running characteristics builder may elect lighten mounts change over 1/2 x 3/ maple would necessitate narrowing firewall former widths accordingly Notice 1A6 crossgraincd balsa formers spaced two inches rear portion fuselage Think same ribs August1999 53 Diagonal ribs flaps aid torsional rigidity Plywood flap horn box allows flaps tweaked trim adjustments Wing panel under construction Wing built halves arrow shaft rods Framed-up wing tip weight box cover frame Author prefers built-up wingtips hollowed block balsa installed fuselage becomes much stiffer good support along its entire length formers weigh about /4 ounce worth installed U slot accommodate pushrod added small piece crossgrained wood top finish off former Use two-inch tube form front shell over after soaking wood ammonia allowed dry overnight next day shell ready trim set place Ive used technique before sure beats shaping hollowing blocks windscreen component shaped small block hollowed P-40K lends itself easy building cockpit area have access vacu forming canopies nor care much about doing cockpit interiors however wellexecuted cockpit clear canopy can look good model like thing think about model received 20 points Roseberg painted canopy painted canopy does hurt appearance points much rear decking installed over rear formers top sheeting locking things together two layers I/ balsa allow top rounded off appropriately technique same used leading edge wing option bottom sheeting install two layers light 1As balsa first 450 fuselage second 900 first effectively creating balsa plywood prevents bit puckering sometimes visible plain crossgrained sheeting exposed high-humidity conditions rain tail wheel mounted similar gear block used wing see below secured regular flat gear strap works very well event tail wheel assembly modified Removability adjustability Stunt model key easy trimming Wing wing construction standard D tube have shown location wing fixture holes use two arrow shafts supported Type CL Stunt Wingspan 59 inches Engine 60 two-stroke Flying Weight 61 ounces Construction Built-up Covering/finish Silkspan dope 54 Model Aviation e-up real turtledeck Note arrow shaft pushrod Diagonal ribs used elevator provide extra stiffness done flaps Rabe rudder kicked right down-elevator command given parallel stanchions build wing half separately wing halves joined inserting arrow shafts halfway wing maintain alignment After glue sets slide shafts out rest wing completed leading edge built up two layers 1/8 balsa locks leading edge sheeting place allows leading edge rounded proper radius last rib trimmed down creating sweeping curve leading edge last bay also reduces thickness tip rib making easier transition tip Note ling edge cap shaped sandwiched between trailing edge sheeting method too tough eliminates external joint dealt finishing stage wingtips may carved light block hollowed may built up preference build up just hate thought throwing good balsa away after hollowing block landing gear mounts shown built up 1/ 1/16 plywood supported vertically plywood vertical support spans both spars effectively creating landing gear box making strong light prefer method over conventional maple landing gear blocks heavy strong /I6 plywood gear cover secures 4-40 flathead screws Tail The flaps tail surfaces built up using method found Bob Whiteleys Derringer 46 simply have border square balsa geodetic A6 ribs skinned 1A6 balsa method produces lightweight flat extremely stiff surface everything want Stunt model method worked well have made standard building control surfaces Finish I used dope lacquer model recommend lacquer appears little heavy can have some compatibility problems dope recommendation use Sig dope throughout finishing process start nitrate base coats silkspan covering everything four six coats Sig Supercoat dope used wings get covering tighten up use Sig Lite-Coat low-shrink butyrate everything following Apply color scheme choice ink lines whatever elsethen spray clear rubbed out clear regular automotive rubbing compound waxed after dope time cure highest gloss possible use Gorhams silver polish Trimming Flying fuel tank wedged foam resist vibration Fuel vents permanently mounted fuselage fuel lines connect tank provides great isolation between tank vents Mount engine aluminum pads Position center gravity indicated plans about 20% CG find anything farther forward slows turn down too much demands too much control handle output pressure 60-sized Stunter can become lot work fly stiff wind Dont add work necessary Balance airplane laterally supporting tail wheel glow plug right wing should measure two ounces heavy Install enough lead tip box achieve figure leadout wires swept back inch CG handle adjusted approximately three inches line spacing controls turn rate makes exits square corners easier control helping eliminate usual bobble may wish start four-inch spacing first flights clean squares difficult start reducing spacing until squares exit flat smooth ST 60s run happy Rev-Up 13 x 6 most-excellent BY&O 13 x 5 props Rev-Up props tough find Clarence Bulls BY&O props tops 13 x 5 gives 54-second laps lots pulling power Rev-Up 13 x 6 produces 52second laps set up P-40K lightweight threeinch wheels handle sometimes poor grass fields will opt install lightweight 2-inch wheels shown plans Im sure soft three-inch wheels dont give more-consistent landings pavement adjustments safe starting points expected individual will make adjustments suit personal flying style P-40K fun Stunter hands good pilot can produce good flight scores draws lot interest naturally 60size P-40K design has spun off 40-size version being kitted RSM Distribution hope P-40K provides much enjoyment has Feel free contact can assistance Johnston 3417W ElkBugIeLn Meridian ID 83642 208 887-0803 Stunt Engines Tom Dixon Box 671166 Marietta GA 30066 Tom Lay T&L Specialties Box 6052 Torrance CA 90504 Other Addresses Windy Urtnowski 93 Elliott Place Rutherford NJ 07070 RSM Distribution 1570 E Edinger Ave Unit G Santa Ana CA 92705 PAMPA 158 Hying Cloud Isle Foster City CA 94404 August1999 55
Edition: Model Aviation - 1999/08
Page Numbers: 52, 53, 54, 55
Edition: Model Aviation - 1999/08
Page Numbers: 52, 53, 54, 55
Curtiss P-40 represented classic N American fighter aircraft onset World War II Influence racing airplanes 30s gave P-40 its good looks American Volunteer Group AVG painted shark mouth its defining logo P-40 became essence fighter publics mind purpose designing model create competitive machine has good degree charisma effect top-notch Stunters available stand out anything much different rest Scale model have taken consideration some details help define P-40K philosophy create illusion scale actually having scale observer has believe what he/she looking P-40 General shapes details color scheme complete illusion wing employs sweephack leading edge forward sweep flap hinge line Most conventionai Stunters taper leading edge two inches have straight flap hinge line P-40s j small bit taper leading edge two inches flap taper produces wing right proportions w creating illusion recognizable P-40K K variant chosen because P-40 pretty sweeping dorsal fin build E version simply straighten vertical fin leading edge chose AVG paint scheme because probably mostrecognizable design used P-40s shark mouth Chinese stars flying Tiger Hells Angel artwork help create illusion scale Another nice detail exhaust stacks Windy Urtnowski supplies cast resin available directly Windy $5 set aerodynamic properties design mainstream modem Stunt talked Paul Walker two years ago Northwest Control Line Championships Impact weighed 60 ounces 700 square inches wing area seemed like good goal shoot P-40K planned around figures Using lacquer 52 Model Aviation t Johnston Stars wing American Volunteer Group AVG Shark mouth gives P-40K its identity color coat added bit extra weight P-40K does tip scales 61 ounces first contest entered 1997 Northwest Control Line Championships P-40K did better expected frontrow appearance 20 points very generously awarded Stunt judges put very smooth flight total 500 points highest personal Stunt score P-40K very well received people expressing interest building own believe appeal semiscale Stunter will always greatlook Al Rabes Mustang Bearcat Sea Fury great Al Rabe has inspiration Stunt since 16 years old extra effort creating airplane noticeably resembles its full-scale counterpart provides greater interest spectators competitors CONSTRUCTION Engine first priority determine engine install started Double Star 60 Lite weighs two ounces less SuperTigre 60 An 11-ounce engine like DS 60 light tongue muffler six- seven-pound density balsa will get center gravity CG very close plan recommendations ST 60 chosen builder may consider reducing nose moment inch installing adjustable tail weight box Shortening nose may compromise tank room sure will enough room tank requirements use about six ounces fuel pattern ST 60 Other engines available 0S/Magnum 46 53 SuperTigre 51 Stalker 61 tuned-pipe setups used experts days Consult Stunt News Precision Aerobatics Model Pilots Association publication information about multitude Stunt engines available Airframe construction type techniques straightforward conventional some tricks Ive picked up have employed P-40K small things add up create better overall Stunter fuselage uses /32 balsa sides molded front deck rear turtledeck bottom sheeting Light balsa six- seven-pound density range should chosen rest construction supports 3A2 outer skin resulting strong stiff light fuselage 1/2 square maple engine mounts bridged /2 balsa epoxied crossgrained ties nose components together dampening vibration engines like ST 60 engine chosen noted its smooth running characteristics builder may elect lighten mounts change over 1/2 x 3/ maple would necessitate narrowing firewall former widths accordingly Notice 1A6 crossgraincd balsa formers spaced two inches rear portion fuselage Think same ribs August1999 53 Diagonal ribs flaps aid torsional rigidity Plywood flap horn box allows flaps tweaked trim adjustments Wing panel under construction Wing built halves arrow shaft rods Framed-up wing tip weight box cover frame Author prefers built-up wingtips hollowed block balsa installed fuselage becomes much stiffer good support along its entire length formers weigh about /4 ounce worth installed U slot accommodate pushrod added small piece crossgrained wood top finish off former Use two-inch tube form front shell over after soaking wood ammonia allowed dry overnight next day shell ready trim set place Ive used technique before sure beats shaping hollowing blocks windscreen component shaped small block hollowed P-40K lends itself easy building cockpit area have access vacu forming canopies nor care much about doing cockpit interiors however wellexecuted cockpit clear canopy can look good model like thing think about model received 20 points Roseberg painted canopy painted canopy does hurt appearance points much rear decking installed over rear formers top sheeting locking things together two layers I/ balsa allow top rounded off appropriately technique same used leading edge wing option bottom sheeting install two layers light 1As balsa first 450 fuselage second 900 first effectively creating balsa plywood prevents bit puckering sometimes visible plain crossgrained sheeting exposed high-humidity conditions rain tail wheel mounted similar gear block used wing see below secured regular flat gear strap works very well event tail wheel assembly modified Removability adjustability Stunt model key easy trimming Wing wing construction standard D tube have shown location wing fixture holes use two arrow shafts supported Type CL Stunt Wingspan 59 inches Engine 60 two-stroke Flying Weight 61 ounces Construction Built-up Covering/finish Silkspan dope 54 Model Aviation e-up real turtledeck Note arrow shaft pushrod Diagonal ribs used elevator provide extra stiffness done flaps Rabe rudder kicked right down-elevator command given parallel stanchions build wing half separately wing halves joined inserting arrow shafts halfway wing maintain alignment After glue sets slide shafts out rest wing completed leading edge built up two layers 1/8 balsa locks leading edge sheeting place allows leading edge rounded proper radius last rib trimmed down creating sweeping curve leading edge last bay also reduces thickness tip rib making easier transition tip Note ling edge cap shaped sandwiched between trailing edge sheeting method too tough eliminates external joint dealt finishing stage wingtips may carved light block hollowed may built up preference build up just hate thought throwing good balsa away after hollowing block landing gear mounts shown built up 1/ 1/16 plywood supported vertically plywood vertical support spans both spars effectively creating landing gear box making strong light prefer method over conventional maple landing gear blocks heavy strong /I6 plywood gear cover secures 4-40 flathead screws Tail The flaps tail surfaces built up using method found Bob Whiteleys Derringer 46 simply have border square balsa geodetic A6 ribs skinned 1A6 balsa method produces lightweight flat extremely stiff surface everything want Stunt model method worked well have made standard building control surfaces Finish I used dope lacquer model recommend lacquer appears little heavy can have some compatibility problems dope recommendation use Sig dope throughout finishing process start nitrate base coats silkspan covering everything four six coats Sig Supercoat dope used wings get covering tighten up use Sig Lite-Coat low-shrink butyrate everything following Apply color scheme choice ink lines whatever elsethen spray clear rubbed out clear regular automotive rubbing compound waxed after dope time cure highest gloss possible use Gorhams silver polish Trimming Flying fuel tank wedged foam resist vibration Fuel vents permanently mounted fuselage fuel lines connect tank provides great isolation between tank vents Mount engine aluminum pads Position center gravity indicated plans about 20% CG find anything farther forward slows turn down too much demands too much control handle output pressure 60-sized Stunter can become lot work fly stiff wind Dont add work necessary Balance airplane laterally supporting tail wheel glow plug right wing should measure two ounces heavy Install enough lead tip box achieve figure leadout wires swept back inch CG handle adjusted approximately three inches line spacing controls turn rate makes exits square corners easier control helping eliminate usual bobble may wish start four-inch spacing first flights clean squares difficult start reducing spacing until squares exit flat smooth ST 60s run happy Rev-Up 13 x 6 most-excellent BY&O 13 x 5 props Rev-Up props tough find Clarence Bulls BY&O props tops 13 x 5 gives 54-second laps lots pulling power Rev-Up 13 x 6 produces 52second laps set up P-40K lightweight threeinch wheels handle sometimes poor grass fields will opt install lightweight 2-inch wheels shown plans Im sure soft three-inch wheels dont give more-consistent landings pavement adjustments safe starting points expected individual will make adjustments suit personal flying style P-40K fun Stunter hands good pilot can produce good flight scores draws lot interest naturally 60size P-40K design has spun off 40-size version being kitted RSM Distribution hope P-40K provides much enjoyment has Feel free contact can assistance Johnston 3417W ElkBugIeLn Meridian ID 83642 208 887-0803 Stunt Engines Tom Dixon Box 671166 Marietta GA 30066 Tom Lay T&L Specialties Box 6052 Torrance CA 90504 Other Addresses Windy Urtnowski 93 Elliott Place Rutherford NJ 07070 RSM Distribution 1570 E Edinger Ave Unit G Santa Ana CA 92705 PAMPA 158 Hying Cloud Isle Foster City CA 94404 August1999 55
Edition: Model Aviation - 1999/08
Page Numbers: 52, 53, 54, 55
Curtiss P-40 represented classic N American fighter aircraft onset World War II Influence racing airplanes 30s gave P-40 its good looks American Volunteer Group AVG painted shark mouth its defining logo P-40 became essence fighter publics mind purpose designing model create competitive machine has good degree charisma effect top-notch Stunters available stand out anything much different rest Scale model have taken consideration some details help define P-40K philosophy create illusion scale actually having scale observer has believe what he/she looking P-40 General shapes details color scheme complete illusion wing employs sweephack leading edge forward sweep flap hinge line Most conventionai Stunters taper leading edge two inches have straight flap hinge line P-40s j small bit taper leading edge two inches flap taper produces wing right proportions w creating illusion recognizable P-40K K variant chosen because P-40 pretty sweeping dorsal fin build E version simply straighten vertical fin leading edge chose AVG paint scheme because probably mostrecognizable design used P-40s shark mouth Chinese stars flying Tiger Hells Angel artwork help create illusion scale Another nice detail exhaust stacks Windy Urtnowski supplies cast resin available directly Windy $5 set aerodynamic properties design mainstream modem Stunt talked Paul Walker two years ago Northwest Control Line Championships Impact weighed 60 ounces 700 square inches wing area seemed like good goal shoot P-40K planned around figures Using lacquer 52 Model Aviation t Johnston Stars wing American Volunteer Group AVG Shark mouth gives P-40K its identity color coat added bit extra weight P-40K does tip scales 61 ounces first contest entered 1997 Northwest Control Line Championships P-40K did better expected frontrow appearance 20 points very generously awarded Stunt judges put very smooth flight total 500 points highest personal Stunt score P-40K very well received people expressing interest building own believe appeal semiscale Stunter will always greatlook Al Rabes Mustang Bearcat Sea Fury great Al Rabe has inspiration Stunt since 16 years old extra effort creating airplane noticeably resembles its full-scale counterpart provides greater interest spectators competitors CONSTRUCTION Engine first priority determine engine install started Double Star 60 Lite weighs two ounces less SuperTigre 60 An 11-ounce engine like DS 60 light tongue muffler six- seven-pound density balsa will get center gravity CG very close plan recommendations ST 60 chosen builder may consider reducing nose moment inch installing adjustable tail weight box Shortening nose may compromise tank room sure will enough room tank requirements use about six ounces fuel pattern ST 60 Other engines available 0S/Magnum 46 53 SuperTigre 51 Stalker 61 tuned-pipe setups used experts days Consult Stunt News Precision Aerobatics Model Pilots Association publication information about multitude Stunt engines available Airframe construction type techniques straightforward conventional some tricks Ive picked up have employed P-40K small things add up create better overall Stunter fuselage uses /32 balsa sides molded front deck rear turtledeck bottom sheeting Light balsa six- seven-pound density range should chosen rest construction supports 3A2 outer skin resulting strong stiff light fuselage 1/2 square maple engine mounts bridged /2 balsa epoxied crossgrained ties nose components together dampening vibration engines like ST 60 engine chosen noted its smooth running characteristics builder may elect lighten mounts change over 1/2 x 3/ maple would necessitate narrowing firewall former widths accordingly Notice 1A6 crossgraincd balsa formers spaced two inches rear portion fuselage Think same ribs August1999 53 Diagonal ribs flaps aid torsional rigidity Plywood flap horn box allows flaps tweaked trim adjustments Wing panel under construction Wing built halves arrow shaft rods Framed-up wing tip weight box cover frame Author prefers built-up wingtips hollowed block balsa installed fuselage becomes much stiffer good support along its entire length formers weigh about /4 ounce worth installed U slot accommodate pushrod added small piece crossgrained wood top finish off former Use two-inch tube form front shell over after soaking wood ammonia allowed dry overnight next day shell ready trim set place Ive used technique before sure beats shaping hollowing blocks windscreen component shaped small block hollowed P-40K lends itself easy building cockpit area have access vacu forming canopies nor care much about doing cockpit interiors however wellexecuted cockpit clear canopy can look good model like thing think about model received 20 points Roseberg painted canopy painted canopy does hurt appearance points much rear decking installed over rear formers top sheeting locking things together two layers I/ balsa allow top rounded off appropriately technique same used leading edge wing option bottom sheeting install two layers light 1As balsa first 450 fuselage second 900 first effectively creating balsa plywood prevents bit puckering sometimes visible plain crossgrained sheeting exposed high-humidity conditions rain tail wheel mounted similar gear block used wing see below secured regular flat gear strap works very well event tail wheel assembly modified Removability adjustability Stunt model key easy trimming Wing wing construction standard D tube have shown location wing fixture holes use two arrow shafts supported Type CL Stunt Wingspan 59 inches Engine 60 two-stroke Flying Weight 61 ounces Construction Built-up Covering/finish Silkspan dope 54 Model Aviation e-up real turtledeck Note arrow shaft pushrod Diagonal ribs used elevator provide extra stiffness done flaps Rabe rudder kicked right down-elevator command given parallel stanchions build wing half separately wing halves joined inserting arrow shafts halfway wing maintain alignment After glue sets slide shafts out rest wing completed leading edge built up two layers 1/8 balsa locks leading edge sheeting place allows leading edge rounded proper radius last rib trimmed down creating sweeping curve leading edge last bay also reduces thickness tip rib making easier transition tip Note ling edge cap shaped sandwiched between trailing edge sheeting method too tough eliminates external joint dealt finishing stage wingtips may carved light block hollowed may built up preference build up just hate thought throwing good balsa away after hollowing block landing gear mounts shown built up 1/ 1/16 plywood supported vertically plywood vertical support spans both spars effectively creating landing gear box making strong light prefer method over conventional maple landing gear blocks heavy strong /I6 plywood gear cover secures 4-40 flathead screws Tail The flaps tail surfaces built up using method found Bob Whiteleys Derringer 46 simply have border square balsa geodetic A6 ribs skinned 1A6 balsa method produces lightweight flat extremely stiff surface everything want Stunt model method worked well have made standard building control surfaces Finish I used dope lacquer model recommend lacquer appears little heavy can have some compatibility problems dope recommendation use Sig dope throughout finishing process start nitrate base coats silkspan covering everything four six coats Sig Supercoat dope used wings get covering tighten up use Sig Lite-Coat low-shrink butyrate everything following Apply color scheme choice ink lines whatever elsethen spray clear rubbed out clear regular automotive rubbing compound waxed after dope time cure highest gloss possible use Gorhams silver polish Trimming Flying fuel tank wedged foam resist vibration Fuel vents permanently mounted fuselage fuel lines connect tank provides great isolation between tank vents Mount engine aluminum pads Position center gravity indicated plans about 20% CG find anything farther forward slows turn down too much demands too much control handle output pressure 60-sized Stunter can become lot work fly stiff wind Dont add work necessary Balance airplane laterally supporting tail wheel glow plug right wing should measure two ounces heavy Install enough lead tip box achieve figure leadout wires swept back inch CG handle adjusted approximately three inches line spacing controls turn rate makes exits square corners easier control helping eliminate usual bobble may wish start four-inch spacing first flights clean squares difficult start reducing spacing until squares exit flat smooth ST 60s run happy Rev-Up 13 x 6 most-excellent BY&O 13 x 5 props Rev-Up props tough find Clarence Bulls BY&O props tops 13 x 5 gives 54-second laps lots pulling power Rev-Up 13 x 6 produces 52second laps set up P-40K lightweight threeinch wheels handle sometimes poor grass fields will opt install lightweight 2-inch wheels shown plans Im sure soft three-inch wheels dont give more-consistent landings pavement adjustments safe starting points expected individual will make adjustments suit personal flying style P-40K fun Stunter hands good pilot can produce good flight scores draws lot interest naturally 60size P-40K design has spun off 40-size version being kitted RSM Distribution hope P-40K provides much enjoyment has Feel free contact can assistance Johnston 3417W ElkBugIeLn Meridian ID 83642 208 887-0803 Stunt Engines Tom Dixon Box 671166 Marietta GA 30066 Tom Lay T&L Specialties Box 6052 Torrance CA 90504 Other Addresses Windy Urtnowski 93 Elliott Place Rutherford NJ 07070 RSM Distribution 1570 E Edinger Ave Unit G Santa Ana CA 92705 PAMPA 158 Hying Cloud Isle Foster City CA 94404 August1999 55
Edition: Model Aviation - 1999/08
Page Numbers: 52, 53, 54, 55
Curtiss P-40 represented classic N American fighter aircraft onset World War II Influence racing airplanes 30s gave P-40 its good looks American Volunteer Group AVG painted shark mouth its defining logo P-40 became essence fighter publics mind purpose designing model create competitive machine has good degree charisma effect top-notch Stunters available stand out anything much different rest Scale model have taken consideration some details help define P-40K philosophy create illusion scale actually having scale observer has believe what he/she looking P-40 General shapes details color scheme complete illusion wing employs sweephack leading edge forward sweep flap hinge line Most conventionai Stunters taper leading edge two inches have straight flap hinge line P-40s j small bit taper leading edge two inches flap taper produces wing right proportions w creating illusion recognizable P-40K K variant chosen because P-40 pretty sweeping dorsal fin build E version simply straighten vertical fin leading edge chose AVG paint scheme because probably mostrecognizable design used P-40s shark mouth Chinese stars flying Tiger Hells Angel artwork help create illusion scale Another nice detail exhaust stacks Windy Urtnowski supplies cast resin available directly Windy $5 set aerodynamic properties design mainstream modem Stunt talked Paul Walker two years ago Northwest Control Line Championships Impact weighed 60 ounces 700 square inches wing area seemed like good goal shoot P-40K planned around figures Using lacquer 52 Model Aviation t Johnston Stars wing American Volunteer Group AVG Shark mouth gives P-40K its identity color coat added bit extra weight P-40K does tip scales 61 ounces first contest entered 1997 Northwest Control Line Championships P-40K did better expected frontrow appearance 20 points very generously awarded Stunt judges put very smooth flight total 500 points highest personal Stunt score P-40K very well received people expressing interest building own believe appeal semiscale Stunter will always greatlook Al Rabes Mustang Bearcat Sea Fury great Al Rabe has inspiration Stunt since 16 years old extra effort creating airplane noticeably resembles its full-scale counterpart provides greater interest spectators competitors CONSTRUCTION Engine first priority determine engine install started Double Star 60 Lite weighs two ounces less SuperTigre 60 An 11-ounce engine like DS 60 light tongue muffler six- seven-pound density balsa will get center gravity CG very close plan recommendations ST 60 chosen builder may consider reducing nose moment inch installing adjustable tail weight box Shortening nose may compromise tank room sure will enough room tank requirements use about six ounces fuel pattern ST 60 Other engines available 0S/Magnum 46 53 SuperTigre 51 Stalker 61 tuned-pipe setups used experts days Consult Stunt News Precision Aerobatics Model Pilots Association publication information about multitude Stunt engines available Airframe construction type techniques straightforward conventional some tricks Ive picked up have employed P-40K small things add up create better overall Stunter fuselage uses /32 balsa sides molded front deck rear turtledeck bottom sheeting Light balsa six- seven-pound density range should chosen rest construction supports 3A2 outer skin resulting strong stiff light fuselage 1/2 square maple engine mounts bridged /2 balsa epoxied crossgrained ties nose components together dampening vibration engines like ST 60 engine chosen noted its smooth running characteristics builder may elect lighten mounts change over 1/2 x 3/ maple would necessitate narrowing firewall former widths accordingly Notice 1A6 crossgraincd balsa formers spaced two inches rear portion fuselage Think same ribs August1999 53 Diagonal ribs flaps aid torsional rigidity Plywood flap horn box allows flaps tweaked trim adjustments Wing panel under construction Wing built halves arrow shaft rods Framed-up wing tip weight box cover frame Author prefers built-up wingtips hollowed block balsa installed fuselage becomes much stiffer good support along its entire length formers weigh about /4 ounce worth installed U slot accommodate pushrod added small piece crossgrained wood top finish off former Use two-inch tube form front shell over after soaking wood ammonia allowed dry overnight next day shell ready trim set place Ive used technique before sure beats shaping hollowing blocks windscreen component shaped small block hollowed P-40K lends itself easy building cockpit area have access vacu forming canopies nor care much about doing cockpit interiors however wellexecuted cockpit clear canopy can look good model like thing think about model received 20 points Roseberg painted canopy painted canopy does hurt appearance points much rear decking installed over rear formers top sheeting locking things together two layers I/ balsa allow top rounded off appropriately technique same used leading edge wing option bottom sheeting install two layers light 1As balsa first 450 fuselage second 900 first effectively creating balsa plywood prevents bit puckering sometimes visible plain crossgrained sheeting exposed high-humidity conditions rain tail wheel mounted similar gear block used wing see below secured regular flat gear strap works very well event tail wheel assembly modified Removability adjustability Stunt model key easy trimming Wing wing construction standard D tube have shown location wing fixture holes use two arrow shafts supported Type CL Stunt Wingspan 59 inches Engine 60 two-stroke Flying Weight 61 ounces Construction Built-up Covering/finish Silkspan dope 54 Model Aviation e-up real turtledeck Note arrow shaft pushrod Diagonal ribs used elevator provide extra stiffness done flaps Rabe rudder kicked right down-elevator command given parallel stanchions build wing half separately wing halves joined inserting arrow shafts halfway wing maintain alignment After glue sets slide shafts out rest wing completed leading edge built up two layers 1/8 balsa locks leading edge sheeting place allows leading edge rounded proper radius last rib trimmed down creating sweeping curve leading edge last bay also reduces thickness tip rib making easier transition tip Note ling edge cap shaped sandwiched between trailing edge sheeting method too tough eliminates external joint dealt finishing stage wingtips may carved light block hollowed may built up preference build up just hate thought throwing good balsa away after hollowing block landing gear mounts shown built up 1/ 1/16 plywood supported vertically plywood vertical support spans both spars effectively creating landing gear box making strong light prefer method over conventional maple landing gear blocks heavy strong /I6 plywood gear cover secures 4-40 flathead screws Tail The flaps tail surfaces built up using method found Bob Whiteleys Derringer 46 simply have border square balsa geodetic A6 ribs skinned 1A6 balsa method produces lightweight flat extremely stiff surface everything want Stunt model method worked well have made standard building control surfaces Finish I used dope lacquer model recommend lacquer appears little heavy can have some compatibility problems dope recommendation use Sig dope throughout finishing process start nitrate base coats silkspan covering everything four six coats Sig Supercoat dope used wings get covering tighten up use Sig Lite-Coat low-shrink butyrate everything following Apply color scheme choice ink lines whatever elsethen spray clear rubbed out clear regular automotive rubbing compound waxed after dope time cure highest gloss possible use Gorhams silver polish Trimming Flying fuel tank wedged foam resist vibration Fuel vents permanently mounted fuselage fuel lines connect tank provides great isolation between tank vents Mount engine aluminum pads Position center gravity indicated plans about 20% CG find anything farther forward slows turn down too much demands too much control handle output pressure 60-sized Stunter can become lot work fly stiff wind Dont add work necessary Balance airplane laterally supporting tail wheel glow plug right wing should measure two ounces heavy Install enough lead tip box achieve figure leadout wires swept back inch CG handle adjusted approximately three inches line spacing controls turn rate makes exits square corners easier control helping eliminate usual bobble may wish start four-inch spacing first flights clean squares difficult start reducing spacing until squares exit flat smooth ST 60s run happy Rev-Up 13 x 6 most-excellent BY&O 13 x 5 props Rev-Up props tough find Clarence Bulls BY&O props tops 13 x 5 gives 54-second laps lots pulling power Rev-Up 13 x 6 produces 52second laps set up P-40K lightweight threeinch wheels handle sometimes poor grass fields will opt install lightweight 2-inch wheels shown plans Im sure soft three-inch wheels dont give more-consistent landings pavement adjustments safe starting points expected individual will make adjustments suit personal flying style P-40K fun Stunter hands good pilot can produce good flight scores draws lot interest naturally 60size P-40K design has spun off 40-size version being kitted RSM Distribution hope P-40K provides much enjoyment has Feel free contact can assistance Johnston 3417W ElkBugIeLn Meridian ID 83642 208 887-0803 Stunt Engines Tom Dixon Box 671166 Marietta GA 30066 Tom Lay T&L Specialties Box 6052 Torrance CA 90504 Other Addresses Windy Urtnowski 93 Elliott Place Rutherford NJ 07070 RSM Distribution 1570 E Edinger Ave Unit G Santa Ana CA 92705 PAMPA 158 Hying Cloud Isle Foster City CA 94404 August1999 55
