Sport biplane looks add air realism profile stunter Side view shows Pitts Special/Christen Eagle influence Leadout guide bolts strut Fully aerobatic 40-powered biplane stunt model offers scalelike appearance Tom Dixon ~hat control line stunt flier has imagined fully aerobatic WW biplane biplanes have built disappointing built properly model will disappointment wish could take design credit just cant Australia 1988 Sydney club member Grant Wylie offered Zephyr bipe fly enthusiastic about model its ability fly very accurate eights overheads skeptical flight convinced Grant correct Zephyr design Raymond Zarichak published July 1979 issue Model Airplane News dont believe Ray would insulted saying is. uh ctional design Beautiful isnt no question flies very well couple years after trip Australia kept thinking about Zephyr didnt want build did want capture flying ability something scalelike Working magazine-size Zephyr plan began design 38 Special Most basic aerodynamics retained throwing some looks Pitts Specials Christen Eagle full-scale aerobatic bipes scale look better pavement landings landing gear changed layout material top bottom wings made equal size equal inside outside turn rates cheek cowl 3/s-inch balsa added nose stiffness better engine runs Because Zarichak s article commented Fox 35 plane needed run two-cycle used Fox 40 modified stunt prototype wanted power reserve first model exceeded expecta tions However lost handle pulled out hand model regained line tension after going slack attempting pattern engine running too slowly Only Randy Smith ever saw perform took two years build another model shown photos plane better nose lengthened 3/4 inch easier balancing Royal 40 modified stunt provides power May1993 19 40-ounce weight plane will fly pattern just about anything out may difficult believe its true seems biplanes really dont need flaps proper-appearing square maneuvers high induced drag squares mimics drag flaps conventional stunter corner tight-appearing flapped airplane caused wing loading lack flaps 40ounce airplane around 500 square inches wing going turn extremely tightly no matter configured Take hint want absolute maximum performance build model light possible good wood good construction techniques 36 ounces attainable weight Nothing construction 38 Special complicated proper sequencing helpful Construction Wings ribs cut via stack method sandwiching enough balsa blanks between plywood templates needed carving sanding stack shape Since bunch ribs must made will probably have cut three four stacks wings identical exception cutouts bottom top wing cabane interplane struts top bottom wing fuselage struts Dont make two bottom wings two top wings Build both wings before build thing else can psychologically intimi dating build two wings after everything else has built sat unfinished nearly year wing built plan using plastic film covering might consider somewhat different tip construction ribs 20 Model Aviation 4Wheel pants retained 6-32 axle bolt flying rough fields remove pants use larger wheels Front view shows cowl cheeks protruding uniflow vent Carved balsa wheel pants covered -ounce fiberglass cloth Wheels Dave Brown Lectra-Lites Fuel 5% nitro Master Airscrew 11 x 6 prop used Engine Royal 40 reworked competition-type run quality Tank stock 31/2Elevator horn mounted 1/16 ply ounce uniflow Fancher-style adjustable mount Once proper height establishedglued elevator Line clip tail tank may epoxied placewheel launching stooge hookup Full Size Plans AvailableSee Page 184 WING PLAN OBJ5JOCCAINNS CAMASAE__ 4 LOOWOIOS r- GUI/SI/HG lI9-iI I IIIIIII I III ______ I ALSA 4 ET WINO IiTIP NATE WINS SPARS ARE I/MB 52 SAW BALSA~1-1/A SPADING PH noNOTCH PER NIB NPNDINN PLAN SO IBTEN ONSETPOSEN DASANE SINGLA GE WITH WTDNEO BIBS 01N MACNA WINS EHEETINS RIB TEMPLATE CTADIII7CTAP ASH BOTTOMLIIN Il/A BALSA TE BEVEL SEAN44-5 -4 IL.-----2 N ____- I/IS SALSA SHEET WARN INSTA BAT PLO CABASSlOL LINE PLaINS -NEAR ELECTRIC PHHBEN LINES TANT SEATS PRAM IrJArnp-I/IA PLO OGONCONTACT WITH OISA OH CIASETAPAWENLINES_________________BOOST SHOOGS ______CAN RE SIIC RESOLT OSLO--_________________NI/V SALSA NGEDT-NTAID NATE RATTAN HF TOP WINS NASETISA HIS E-BAND TOP GF NATTAM WISH NSEETINATOS/IN BALSA0/IA BALSA HOEr HISSES0/IN RALNAALLOW INTERLACE WITh CABANE Tool ANDSHEETOFFSETS/S IRISATI ITOPICALIOSEETT/SH DIG BASIC WINE ELDOOHINER ISBELLCRANK MOUNT INSHABO0 NI/ICI CAOOOI/A BALSA SODETFINRUDDETAPER C/SE ISTESPLASE SPRAySS05 B I/r MAPLESAND TC FIT BETWEEN PAIBEEMGTCR MOUNTSAIRFAIL SOAPS WINS TIP NIBSSPADE TO N/ITI/A BALSA S -rINTERPLANE STRUTS____ SHRE AA PIECES HA OHLLCWEDOLOSS CLATDI/B AlA5/4 OIL CHRL CREED -ENOS ISTERLOTATATENH/ND TAP N TATTAS SAGESAND EPOXYMANIC RISE TAILOHEEL I/S PLO/ -O DEL AVIATION 144 ANA SOLO-S-WAC TANS BOLTSOSH SPAS HOLES__________________ IGNED NT TOM DIHAN INKED PLANS ST JOE DEMATCH ALL SIGHTS HOEr BA PLAN ________ ANflINO CFAR OFTAIL drawn bit difficult cover wrinkles Partial blocks leading trailing edges may work better engine mount section needs planned around choice engine Several models have built SuperTigre 46s others use 05 40 FPs selecting engine consider length run fuel availabletank room somewhat limited used 31/2-ounce Smiths uniflow Royal 40 model shown Most engines will need tank mounted 3/ inch above engine centerline used Fancher mount tank height easily adjustable feature has never neededMurphys Law reverse easiest way install controls bend pushrod length over plan stab/elevator assembly permanently installed attach horn pushrod elevator Tape elevator neutral epoxy bellcrank ply mount assembly outboard Belicrank mounts pre-mounted pieces 1k-inch plywood epoxied outboard side fuselage Pushrod brace small control horn drilled pushrod passage Pushrods belicrank end has foolproof Z-bend Type Control line stunt Wingspan 38 inches Recommended motor size type 35-46 glow Expected flying weight 40 ounces Type construction Built-up Type covering finish recommended Iron-on film fuselage side bellerank also neutral Wait until after painting install leadouts critical aspect model alignment wings both other stab thrust line error should top wing incidence can probably get away degree negative incidence thing else should zero degrees relative thrust line Attach bottom wing fuselage align very carefully before glue cures Dry-fit struts top wing check alignment aligned epoxy struts lower wing attach top wing Whether film paper used covering far easier have top wing completely finished before attaching May1993 21 U J ALSA[ --4-4--v Vi-V-LI-V As finishing technique whatever pleases keep light possible Flight trim biplanes little different Because short fuselage rudder thrust offsets very sensitive use zero engine offset about 3A6- -inch rudder offset Mine balances level held 23/s-inch back leading edge top wing its nose heavy model wont clean squares tail heavy wont groove level flight may want different dont vary too far balance point mentioned 38 Special has exactly e built-in tip weight top outboard wing didnt build adjustable tip weight box MonoKote its always adjustable just cut patch However outboard engine cylinder verges being too much tip weight Start about ounce ready take some out find model rolls outboard too much both inside outside maneuvers Leadout position big deal biplane its wrong cant change have just another sport plane real performer Heres way get correct right away First locate fore-and-aft CG center gravity indicated above hang plane piece string tied around inboard strut Slide string up down strut until model hangs vertical Everything needs plane pointmuffler prop wheel pants tankeverything Once model hangs vertical mark string location strut Now make line guide /s-inch plywood bolt strut two 4-40 bolts guide should extra-long begin Now take string tie around guide Slide string back forth guide plane hangs about two three degrees nose down string midpoint between two leadouts remove guide drill holes bush eyelets tubing paint bolt back place dry Add leadouts youre ready fly can make guide adjustable wish above method will very very close final placement anyway prefer make new guide needed rather carry weight drag time guide could made vertically adjustable its properly located begin wont need vertical adjustment plane flies crooked guide correct place warp some Twist wings proper direction heating heat gun let cool holding new setting After couple tries model will flying level wings way heat gun also works paint paper just plastic film no flaps tweak tabs ugly way 38 Special trims flies just like other profile stunter ended up using 11 x 6 Master Airscrew wood prop 5% nitro Taffender PA fuel 275 venturi 63-foot lines Lap times about 52 53 seconds landing gear location shown pavement model can put down mains rolled half lap before tall wheel comes down Enjoy 38 Special fly safely ers Editor Continued page 5 also trust article will continue promote model float flying article has already aroused interest have received quite lengthy letter requesting information advice phone call net result being fellow modeler will visit September 25 weather permitting will go course float flying So again thank very much third-to-last paragraph p 24 suggested written column feature could started relating fascinating aspects model float flying offer still standsI am trying return great hobby/sport small portion what have received abundance trust will forgive audacity conclusion please let thank once again let know way can help Jim Halls Johnson Vermont Still Another Viewpoint Im beginning novice truest sense word pattern flier recently competed first pattern contest North Coast Pattern Championship Cleveland showed up bright early Saturday morning older Tipo backup air plane older FM radio does have dual conversion receiver didnt want risk good airplane fearing firstcontest nerves equals dumb thumbs may turn trash Trying get couple practice flights before contest realized old radio wouldnt cut frequencycongested skies Cleveland After takeoff marginal control landed uneventfully yes did range check before flight Locating CD Mike Kline regis tration building informed him old Continued page 153 22 Model Aviation 4in. — olt12A H$1200 l2VoIt 65AH$1600 VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING AX FOR FL RESIDENTS KULPRIT THE ULTIMATE IN COMBAT COMPLETE KIT $3500 WING KITS$1750 ENGINE SIZE 20 40 WING AREA S40 50 IN WEIGHT2S-3SLBSI _______ R&B PRODUCTS 318-747-5331 2503 LAVONNE nOSSIER CITY LA 71111
Edition: Model Aviation - 1993/05
Page Numbers: 19, 20, 21, 22
Sport biplane looks add air realism profile stunter Side view shows Pitts Special/Christen Eagle influence Leadout guide bolts strut Fully aerobatic 40-powered biplane stunt model offers scalelike appearance Tom Dixon ~hat control line stunt flier has imagined fully aerobatic WW biplane biplanes have built disappointing built properly model will disappointment wish could take design credit just cant Australia 1988 Sydney club member Grant Wylie offered Zephyr bipe fly enthusiastic about model its ability fly very accurate eights overheads skeptical flight convinced Grant correct Zephyr design Raymond Zarichak published July 1979 issue Model Airplane News dont believe Ray would insulted saying is. uh ctional design Beautiful isnt no question flies very well couple years after trip Australia kept thinking about Zephyr didnt want build did want capture flying ability something scalelike Working magazine-size Zephyr plan began design 38 Special Most basic aerodynamics retained throwing some looks Pitts Specials Christen Eagle full-scale aerobatic bipes scale look better pavement landings landing gear changed layout material top bottom wings made equal size equal inside outside turn rates cheek cowl 3/s-inch balsa added nose stiffness better engine runs Because Zarichak s article commented Fox 35 plane needed run two-cycle used Fox 40 modified stunt prototype wanted power reserve first model exceeded expecta tions However lost handle pulled out hand model regained line tension after going slack attempting pattern engine running too slowly Only Randy Smith ever saw perform took two years build another model shown photos plane better nose lengthened 3/4 inch easier balancing Royal 40 modified stunt provides power May1993 19 40-ounce weight plane will fly pattern just about anything out may difficult believe its true seems biplanes really dont need flaps proper-appearing square maneuvers high induced drag squares mimics drag flaps conventional stunter corner tight-appearing flapped airplane caused wing loading lack flaps 40ounce airplane around 500 square inches wing going turn extremely tightly no matter configured Take hint want absolute maximum performance build model light possible good wood good construction techniques 36 ounces attainable weight Nothing construction 38 Special complicated proper sequencing helpful Construction Wings ribs cut via stack method sandwiching enough balsa blanks between plywood templates needed carving sanding stack shape Since bunch ribs must made will probably have cut three four stacks wings identical exception cutouts bottom top wing cabane interplane struts top bottom wing fuselage struts Dont make two bottom wings two top wings Build both wings before build thing else can psychologically intimi dating build two wings after everything else has built sat unfinished nearly year wing built plan using plastic film covering might consider somewhat different tip construction ribs 20 Model Aviation 4Wheel pants retained 6-32 axle bolt flying rough fields remove pants use larger wheels Front view shows cowl cheeks protruding uniflow vent Carved balsa wheel pants covered -ounce fiberglass cloth Wheels Dave Brown Lectra-Lites Fuel 5% nitro Master Airscrew 11 x 6 prop used Engine Royal 40 reworked competition-type run quality Tank stock 31/2Elevator horn mounted 1/16 ply ounce uniflow Fancher-style adjustable mount Once proper height establishedglued elevator Line clip tail tank may epoxied placewheel launching stooge hookup Full Size Plans AvailableSee Page 184 WING PLAN OBJ5JOCCAINNS CAMASAE__ 4 LOOWOIOS r- GUI/SI/HG lI9-iI I IIIIIII I III ______ I ALSA 4 ET WINO IiTIP NATE WINS SPARS ARE I/MB 52 SAW BALSA~1-1/A SPADING PH noNOTCH PER NIB NPNDINN PLAN SO IBTEN ONSETPOSEN DASANE SINGLA GE WITH WTDNEO BIBS 01N MACNA WINS EHEETINS RIB TEMPLATE CTADIII7CTAP ASH BOTTOMLIIN Il/A BALSA TE BEVEL SEAN44-5 -4 IL.-----2 N ____- I/IS SALSA SHEET WARN INSTA BAT PLO CABASSlOL LINE PLaINS -NEAR ELECTRIC PHHBEN LINES TANT SEATS PRAM IrJArnp-I/IA PLO OGONCONTACT WITH OISA OH CIASETAPAWENLINES_________________BOOST SHOOGS ______CAN RE SIIC RESOLT OSLO--_________________NI/V SALSA NGEDT-NTAID NATE RATTAN HF TOP WINS NASETISA HIS E-BAND TOP GF NATTAM WISH NSEETINATOS/IN BALSA0/IA BALSA HOEr HISSES0/IN RALNAALLOW INTERLACE WITh CABANE Tool ANDSHEETOFFSETS/S IRISATI ITOPICALIOSEETT/SH DIG BASIC WINE ELDOOHINER ISBELLCRANK MOUNT INSHABO0 NI/ICI CAOOOI/A BALSA SODETFINRUDDETAPER C/SE ISTESPLASE SPRAySS05 B I/r MAPLESAND TC FIT BETWEEN PAIBEEMGTCR MOUNTSAIRFAIL SOAPS WINS TIP NIBSSPADE TO N/ITI/A BALSA S -rINTERPLANE STRUTS____ SHRE AA PIECES HA OHLLCWEDOLOSS CLATDI/B AlA5/4 OIL CHRL CREED -ENOS ISTERLOTATATENH/ND TAP N TATTAS SAGESAND EPOXYMANIC RISE TAILOHEEL I/S PLO/ -O DEL AVIATION 144 ANA SOLO-S-WAC TANS BOLTSOSH SPAS HOLES__________________ IGNED NT TOM DIHAN INKED PLANS ST JOE DEMATCH ALL SIGHTS HOEr BA PLAN ________ ANflINO CFAR OFTAIL drawn bit difficult cover wrinkles Partial blocks leading trailing edges may work better engine mount section needs planned around choice engine Several models have built SuperTigre 46s others use 05 40 FPs selecting engine consider length run fuel availabletank room somewhat limited used 31/2-ounce Smiths uniflow Royal 40 model shown Most engines will need tank mounted 3/ inch above engine centerline used Fancher mount tank height easily adjustable feature has never neededMurphys Law reverse easiest way install controls bend pushrod length over plan stab/elevator assembly permanently installed attach horn pushrod elevator Tape elevator neutral epoxy bellcrank ply mount assembly outboard Belicrank mounts pre-mounted pieces 1k-inch plywood epoxied outboard side fuselage Pushrod brace small control horn drilled pushrod passage Pushrods belicrank end has foolproof Z-bend Type Control line stunt Wingspan 38 inches Recommended motor size type 35-46 glow Expected flying weight 40 ounces Type construction Built-up Type covering finish recommended Iron-on film fuselage side bellerank also neutral Wait until after painting install leadouts critical aspect model alignment wings both other stab thrust line error should top wing incidence can probably get away degree negative incidence thing else should zero degrees relative thrust line Attach bottom wing fuselage align very carefully before glue cures Dry-fit struts top wing check alignment aligned epoxy struts lower wing attach top wing Whether film paper used covering far easier have top wing completely finished before attaching May1993 21 U J ALSA[ --4-4--v Vi-V-LI-V As finishing technique whatever pleases keep light possible Flight trim biplanes little different Because short fuselage rudder thrust offsets very sensitive use zero engine offset about 3A6- -inch rudder offset Mine balances level held 23/s-inch back leading edge top wing its nose heavy model wont clean squares tail heavy wont groove level flight may want different dont vary too far balance point mentioned 38 Special has exactly e built-in tip weight top outboard wing didnt build adjustable tip weight box MonoKote its always adjustable just cut patch However outboard engine cylinder verges being too much tip weight Start about ounce ready take some out find model rolls outboard too much both inside outside maneuvers Leadout position big deal biplane its wrong cant change have just another sport plane real performer Heres way get correct right away First locate fore-and-aft CG center gravity indicated above hang plane piece string tied around inboard strut Slide string up down strut until model hangs vertical Everything needs plane pointmuffler prop wheel pants tankeverything Once model hangs vertical mark string location strut Now make line guide /s-inch plywood bolt strut two 4-40 bolts guide should extra-long begin Now take string tie around guide Slide string back forth guide plane hangs about two three degrees nose down string midpoint between two leadouts remove guide drill holes bush eyelets tubing paint bolt back place dry Add leadouts youre ready fly can make guide adjustable wish above method will very very close final placement anyway prefer make new guide needed rather carry weight drag time guide could made vertically adjustable its properly located begin wont need vertical adjustment plane flies crooked guide correct place warp some Twist wings proper direction heating heat gun let cool holding new setting After couple tries model will flying level wings way heat gun also works paint paper just plastic film no flaps tweak tabs ugly way 38 Special trims flies just like other profile stunter ended up using 11 x 6 Master Airscrew wood prop 5% nitro Taffender PA fuel 275 venturi 63-foot lines Lap times about 52 53 seconds landing gear location shown pavement model can put down mains rolled half lap before tall wheel comes down Enjoy 38 Special fly safely ers Editor Continued page 5 also trust article will continue promote model float flying article has already aroused interest have received quite lengthy letter requesting information advice phone call net result being fellow modeler will visit September 25 weather permitting will go course float flying So again thank very much third-to-last paragraph p 24 suggested written column feature could started relating fascinating aspects model float flying offer still standsI am trying return great hobby/sport small portion what have received abundance trust will forgive audacity conclusion please let thank once again let know way can help Jim Halls Johnson Vermont Still Another Viewpoint Im beginning novice truest sense word pattern flier recently competed first pattern contest North Coast Pattern Championship Cleveland showed up bright early Saturday morning older Tipo backup air plane older FM radio does have dual conversion receiver didnt want risk good airplane fearing firstcontest nerves equals dumb thumbs may turn trash Trying get couple practice flights before contest realized old radio wouldnt cut frequencycongested skies Cleveland After takeoff marginal control landed uneventfully yes did range check before flight Locating CD Mike Kline regis tration building informed him old Continued page 153 22 Model Aviation 4in. — olt12A H$1200 l2VoIt 65AH$1600 VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING AX FOR FL RESIDENTS KULPRIT THE ULTIMATE IN COMBAT COMPLETE KIT $3500 WING KITS$1750 ENGINE SIZE 20 40 WING AREA S40 50 IN WEIGHT2S-3SLBSI _______ R&B PRODUCTS 318-747-5331 2503 LAVONNE nOSSIER CITY LA 71111
Edition: Model Aviation - 1993/05
Page Numbers: 19, 20, 21, 22
Sport biplane looks add air realism profile stunter Side view shows Pitts Special/Christen Eagle influence Leadout guide bolts strut Fully aerobatic 40-powered biplane stunt model offers scalelike appearance Tom Dixon ~hat control line stunt flier has imagined fully aerobatic WW biplane biplanes have built disappointing built properly model will disappointment wish could take design credit just cant Australia 1988 Sydney club member Grant Wylie offered Zephyr bipe fly enthusiastic about model its ability fly very accurate eights overheads skeptical flight convinced Grant correct Zephyr design Raymond Zarichak published July 1979 issue Model Airplane News dont believe Ray would insulted saying is. uh ctional design Beautiful isnt no question flies very well couple years after trip Australia kept thinking about Zephyr didnt want build did want capture flying ability something scalelike Working magazine-size Zephyr plan began design 38 Special Most basic aerodynamics retained throwing some looks Pitts Specials Christen Eagle full-scale aerobatic bipes scale look better pavement landings landing gear changed layout material top bottom wings made equal size equal inside outside turn rates cheek cowl 3/s-inch balsa added nose stiffness better engine runs Because Zarichak s article commented Fox 35 plane needed run two-cycle used Fox 40 modified stunt prototype wanted power reserve first model exceeded expecta tions However lost handle pulled out hand model regained line tension after going slack attempting pattern engine running too slowly Only Randy Smith ever saw perform took two years build another model shown photos plane better nose lengthened 3/4 inch easier balancing Royal 40 modified stunt provides power May1993 19 40-ounce weight plane will fly pattern just about anything out may difficult believe its true seems biplanes really dont need flaps proper-appearing square maneuvers high induced drag squares mimics drag flaps conventional stunter corner tight-appearing flapped airplane caused wing loading lack flaps 40ounce airplane around 500 square inches wing going turn extremely tightly no matter configured Take hint want absolute maximum performance build model light possible good wood good construction techniques 36 ounces attainable weight Nothing construction 38 Special complicated proper sequencing helpful Construction Wings ribs cut via stack method sandwiching enough balsa blanks between plywood templates needed carving sanding stack shape Since bunch ribs must made will probably have cut three four stacks wings identical exception cutouts bottom top wing cabane interplane struts top bottom wing fuselage struts Dont make two bottom wings two top wings Build both wings before build thing else can psychologically intimi dating build two wings after everything else has built sat unfinished nearly year wing built plan using plastic film covering might consider somewhat different tip construction ribs 20 Model Aviation 4Wheel pants retained 6-32 axle bolt flying rough fields remove pants use larger wheels Front view shows cowl cheeks protruding uniflow vent Carved balsa wheel pants covered -ounce fiberglass cloth Wheels Dave Brown Lectra-Lites Fuel 5% nitro Master Airscrew 11 x 6 prop used Engine Royal 40 reworked competition-type run quality Tank stock 31/2Elevator horn mounted 1/16 ply ounce uniflow Fancher-style adjustable mount Once proper height establishedglued elevator Line clip tail tank may epoxied placewheel launching stooge hookup Full Size Plans AvailableSee Page 184 WING PLAN OBJ5JOCCAINNS CAMASAE__ 4 LOOWOIOS r- GUI/SI/HG lI9-iI I IIIIIII I III ______ I ALSA 4 ET WINO IiTIP NATE WINS SPARS ARE I/MB 52 SAW BALSA~1-1/A SPADING PH noNOTCH PER NIB NPNDINN PLAN SO IBTEN ONSETPOSEN DASANE SINGLA GE WITH WTDNEO BIBS 01N MACNA WINS EHEETINS RIB TEMPLATE CTADIII7CTAP ASH BOTTOMLIIN Il/A BALSA TE BEVEL SEAN44-5 -4 IL.-----2 N ____- I/IS SALSA SHEET WARN INSTA BAT PLO CABASSlOL LINE PLaINS -NEAR ELECTRIC PHHBEN LINES TANT SEATS PRAM IrJArnp-I/IA PLO OGONCONTACT WITH OISA OH CIASETAPAWENLINES_________________BOOST SHOOGS ______CAN RE SIIC RESOLT OSLO--_________________NI/V SALSA NGEDT-NTAID NATE RATTAN HF TOP WINS NASETISA HIS E-BAND TOP GF NATTAM WISH NSEETINATOS/IN BALSA0/IA BALSA HOEr HISSES0/IN RALNAALLOW INTERLACE WITh CABANE Tool ANDSHEETOFFSETS/S IRISATI ITOPICALIOSEETT/SH DIG BASIC WINE ELDOOHINER ISBELLCRANK MOUNT INSHABO0 NI/ICI CAOOOI/A BALSA SODETFINRUDDETAPER C/SE ISTESPLASE SPRAySS05 B I/r MAPLESAND TC FIT BETWEEN PAIBEEMGTCR MOUNTSAIRFAIL SOAPS WINS TIP NIBSSPADE TO N/ITI/A BALSA S -rINTERPLANE STRUTS____ SHRE AA PIECES HA OHLLCWEDOLOSS CLATDI/B AlA5/4 OIL CHRL CREED -ENOS ISTERLOTATATENH/ND TAP N TATTAS SAGESAND EPOXYMANIC RISE TAILOHEEL I/S PLO/ -O DEL AVIATION 144 ANA SOLO-S-WAC TANS BOLTSOSH SPAS HOLES__________________ IGNED NT TOM DIHAN INKED PLANS ST JOE DEMATCH ALL SIGHTS HOEr BA PLAN ________ ANflINO CFAR OFTAIL drawn bit difficult cover wrinkles Partial blocks leading trailing edges may work better engine mount section needs planned around choice engine Several models have built SuperTigre 46s others use 05 40 FPs selecting engine consider length run fuel availabletank room somewhat limited used 31/2-ounce Smiths uniflow Royal 40 model shown Most engines will need tank mounted 3/ inch above engine centerline used Fancher mount tank height easily adjustable feature has never neededMurphys Law reverse easiest way install controls bend pushrod length over plan stab/elevator assembly permanently installed attach horn pushrod elevator Tape elevator neutral epoxy bellcrank ply mount assembly outboard Belicrank mounts pre-mounted pieces 1k-inch plywood epoxied outboard side fuselage Pushrod brace small control horn drilled pushrod passage Pushrods belicrank end has foolproof Z-bend Type Control line stunt Wingspan 38 inches Recommended motor size type 35-46 glow Expected flying weight 40 ounces Type construction Built-up Type covering finish recommended Iron-on film fuselage side bellerank also neutral Wait until after painting install leadouts critical aspect model alignment wings both other stab thrust line error should top wing incidence can probably get away degree negative incidence thing else should zero degrees relative thrust line Attach bottom wing fuselage align very carefully before glue cures Dry-fit struts top wing check alignment aligned epoxy struts lower wing attach top wing Whether film paper used covering far easier have top wing completely finished before attaching May1993 21 U J ALSA[ --4-4--v Vi-V-LI-V As finishing technique whatever pleases keep light possible Flight trim biplanes little different Because short fuselage rudder thrust offsets very sensitive use zero engine offset about 3A6- -inch rudder offset Mine balances level held 23/s-inch back leading edge top wing its nose heavy model wont clean squares tail heavy wont groove level flight may want different dont vary too far balance point mentioned 38 Special has exactly e built-in tip weight top outboard wing didnt build adjustable tip weight box MonoKote its always adjustable just cut patch However outboard engine cylinder verges being too much tip weight Start about ounce ready take some out find model rolls outboard too much both inside outside maneuvers Leadout position big deal biplane its wrong cant change have just another sport plane real performer Heres way get correct right away First locate fore-and-aft CG center gravity indicated above hang plane piece string tied around inboard strut Slide string up down strut until model hangs vertical Everything needs plane pointmuffler prop wheel pants tankeverything Once model hangs vertical mark string location strut Now make line guide /s-inch plywood bolt strut two 4-40 bolts guide should extra-long begin Now take string tie around guide Slide string back forth guide plane hangs about two three degrees nose down string midpoint between two leadouts remove guide drill holes bush eyelets tubing paint bolt back place dry Add leadouts youre ready fly can make guide adjustable wish above method will very very close final placement anyway prefer make new guide needed rather carry weight drag time guide could made vertically adjustable its properly located begin wont need vertical adjustment plane flies crooked guide correct place warp some Twist wings proper direction heating heat gun let cool holding new setting After couple tries model will flying level wings way heat gun also works paint paper just plastic film no flaps tweak tabs ugly way 38 Special trims flies just like other profile stunter ended up using 11 x 6 Master Airscrew wood prop 5% nitro Taffender PA fuel 275 venturi 63-foot lines Lap times about 52 53 seconds landing gear location shown pavement model can put down mains rolled half lap before tall wheel comes down Enjoy 38 Special fly safely ers Editor Continued page 5 also trust article will continue promote model float flying article has already aroused interest have received quite lengthy letter requesting information advice phone call net result being fellow modeler will visit September 25 weather permitting will go course float flying So again thank very much third-to-last paragraph p 24 suggested written column feature could started relating fascinating aspects model float flying offer still standsI am trying return great hobby/sport small portion what have received abundance trust will forgive audacity conclusion please let thank once again let know way can help Jim Halls Johnson Vermont Still Another Viewpoint Im beginning novice truest sense word pattern flier recently competed first pattern contest North Coast Pattern Championship Cleveland showed up bright early Saturday morning older Tipo backup air plane older FM radio does have dual conversion receiver didnt want risk good airplane fearing firstcontest nerves equals dumb thumbs may turn trash Trying get couple practice flights before contest realized old radio wouldnt cut frequencycongested skies Cleveland After takeoff marginal control landed uneventfully yes did range check before flight Locating CD Mike Kline regis tration building informed him old Continued page 153 22 Model Aviation 4in. — olt12A H$1200 l2VoIt 65AH$1600 VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING AX FOR FL RESIDENTS KULPRIT THE ULTIMATE IN COMBAT COMPLETE KIT $3500 WING KITS$1750 ENGINE SIZE 20 40 WING AREA S40 50 IN WEIGHT2S-3SLBSI _______ R&B PRODUCTS 318-747-5331 2503 LAVONNE nOSSIER CITY LA 71111
Edition: Model Aviation - 1993/05
Page Numbers: 19, 20, 21, 22
Sport biplane looks add air realism profile stunter Side view shows Pitts Special/Christen Eagle influence Leadout guide bolts strut Fully aerobatic 40-powered biplane stunt model offers scalelike appearance Tom Dixon ~hat control line stunt flier has imagined fully aerobatic WW biplane biplanes have built disappointing built properly model will disappointment wish could take design credit just cant Australia 1988 Sydney club member Grant Wylie offered Zephyr bipe fly enthusiastic about model its ability fly very accurate eights overheads skeptical flight convinced Grant correct Zephyr design Raymond Zarichak published July 1979 issue Model Airplane News dont believe Ray would insulted saying is. uh ctional design Beautiful isnt no question flies very well couple years after trip Australia kept thinking about Zephyr didnt want build did want capture flying ability something scalelike Working magazine-size Zephyr plan began design 38 Special Most basic aerodynamics retained throwing some looks Pitts Specials Christen Eagle full-scale aerobatic bipes scale look better pavement landings landing gear changed layout material top bottom wings made equal size equal inside outside turn rates cheek cowl 3/s-inch balsa added nose stiffness better engine runs Because Zarichak s article commented Fox 35 plane needed run two-cycle used Fox 40 modified stunt prototype wanted power reserve first model exceeded expecta tions However lost handle pulled out hand model regained line tension after going slack attempting pattern engine running too slowly Only Randy Smith ever saw perform took two years build another model shown photos plane better nose lengthened 3/4 inch easier balancing Royal 40 modified stunt provides power May1993 19 40-ounce weight plane will fly pattern just about anything out may difficult believe its true seems biplanes really dont need flaps proper-appearing square maneuvers high induced drag squares mimics drag flaps conventional stunter corner tight-appearing flapped airplane caused wing loading lack flaps 40ounce airplane around 500 square inches wing going turn extremely tightly no matter configured Take hint want absolute maximum performance build model light possible good wood good construction techniques 36 ounces attainable weight Nothing construction 38 Special complicated proper sequencing helpful Construction Wings ribs cut via stack method sandwiching enough balsa blanks between plywood templates needed carving sanding stack shape Since bunch ribs must made will probably have cut three four stacks wings identical exception cutouts bottom top wing cabane interplane struts top bottom wing fuselage struts Dont make two bottom wings two top wings Build both wings before build thing else can psychologically intimi dating build two wings after everything else has built sat unfinished nearly year wing built plan using plastic film covering might consider somewhat different tip construction ribs 20 Model Aviation 4Wheel pants retained 6-32 axle bolt flying rough fields remove pants use larger wheels Front view shows cowl cheeks protruding uniflow vent Carved balsa wheel pants covered -ounce fiberglass cloth Wheels Dave Brown Lectra-Lites Fuel 5% nitro Master Airscrew 11 x 6 prop used Engine Royal 40 reworked competition-type run quality Tank stock 31/2Elevator horn mounted 1/16 ply ounce uniflow Fancher-style adjustable mount Once proper height establishedglued elevator Line clip tail tank may epoxied placewheel launching stooge hookup Full Size Plans AvailableSee Page 184 WING PLAN OBJ5JOCCAINNS CAMASAE__ 4 LOOWOIOS r- GUI/SI/HG lI9-iI I IIIIIII I III ______ I ALSA 4 ET WINO IiTIP NATE WINS SPARS ARE I/MB 52 SAW BALSA~1-1/A SPADING PH noNOTCH PER NIB NPNDINN PLAN SO IBTEN ONSETPOSEN DASANE SINGLA GE WITH WTDNEO BIBS 01N MACNA WINS EHEETINS RIB TEMPLATE CTADIII7CTAP ASH BOTTOMLIIN Il/A BALSA TE BEVEL SEAN44-5 -4 IL.-----2 N ____- I/IS SALSA SHEET WARN INSTA BAT PLO CABASSlOL LINE PLaINS -NEAR ELECTRIC PHHBEN LINES TANT SEATS PRAM IrJArnp-I/IA PLO OGONCONTACT WITH OISA OH CIASETAPAWENLINES_________________BOOST SHOOGS ______CAN RE SIIC RESOLT OSLO--_________________NI/V SALSA NGEDT-NTAID NATE RATTAN HF TOP WINS NASETISA HIS E-BAND TOP GF NATTAM WISH NSEETINATOS/IN BALSA0/IA BALSA HOEr HISSES0/IN RALNAALLOW INTERLACE WITh CABANE Tool ANDSHEETOFFSETS/S IRISATI ITOPICALIOSEETT/SH DIG BASIC WINE ELDOOHINER ISBELLCRANK MOUNT INSHABO0 NI/ICI CAOOOI/A BALSA SODETFINRUDDETAPER C/SE ISTESPLASE SPRAySS05 B I/r MAPLESAND TC FIT BETWEEN PAIBEEMGTCR MOUNTSAIRFAIL SOAPS WINS TIP NIBSSPADE TO N/ITI/A BALSA S -rINTERPLANE STRUTS____ SHRE AA PIECES HA OHLLCWEDOLOSS CLATDI/B AlA5/4 OIL CHRL CREED -ENOS ISTERLOTATATENH/ND TAP N TATTAS SAGESAND EPOXYMANIC RISE TAILOHEEL I/S PLO/ -O DEL AVIATION 144 ANA SOLO-S-WAC TANS BOLTSOSH SPAS HOLES__________________ IGNED NT TOM DIHAN INKED PLANS ST JOE DEMATCH ALL SIGHTS HOEr BA PLAN ________ ANflINO CFAR OFTAIL drawn bit difficult cover wrinkles Partial blocks leading trailing edges may work better engine mount section needs planned around choice engine Several models have built SuperTigre 46s others use 05 40 FPs selecting engine consider length run fuel availabletank room somewhat limited used 31/2-ounce Smiths uniflow Royal 40 model shown Most engines will need tank mounted 3/ inch above engine centerline used Fancher mount tank height easily adjustable feature has never neededMurphys Law reverse easiest way install controls bend pushrod length over plan stab/elevator assembly permanently installed attach horn pushrod elevator Tape elevator neutral epoxy bellcrank ply mount assembly outboard Belicrank mounts pre-mounted pieces 1k-inch plywood epoxied outboard side fuselage Pushrod brace small control horn drilled pushrod passage Pushrods belicrank end has foolproof Z-bend Type Control line stunt Wingspan 38 inches Recommended motor size type 35-46 glow Expected flying weight 40 ounces Type construction Built-up Type covering finish recommended Iron-on film fuselage side bellerank also neutral Wait until after painting install leadouts critical aspect model alignment wings both other stab thrust line error should top wing incidence can probably get away degree negative incidence thing else should zero degrees relative thrust line Attach bottom wing fuselage align very carefully before glue cures Dry-fit struts top wing check alignment aligned epoxy struts lower wing attach top wing Whether film paper used covering far easier have top wing completely finished before attaching May1993 21 U J ALSA[ --4-4--v Vi-V-LI-V As finishing technique whatever pleases keep light possible Flight trim biplanes little different Because short fuselage rudder thrust offsets very sensitive use zero engine offset about 3A6- -inch rudder offset Mine balances level held 23/s-inch back leading edge top wing its nose heavy model wont clean squares tail heavy wont groove level flight may want different dont vary too far balance point mentioned 38 Special has exactly e built-in tip weight top outboard wing didnt build adjustable tip weight box MonoKote its always adjustable just cut patch However outboard engine cylinder verges being too much tip weight Start about ounce ready take some out find model rolls outboard too much both inside outside maneuvers Leadout position big deal biplane its wrong cant change have just another sport plane real performer Heres way get correct right away First locate fore-and-aft CG center gravity indicated above hang plane piece string tied around inboard strut Slide string up down strut until model hangs vertical Everything needs plane pointmuffler prop wheel pants tankeverything Once model hangs vertical mark string location strut Now make line guide /s-inch plywood bolt strut two 4-40 bolts guide should extra-long begin Now take string tie around guide Slide string back forth guide plane hangs about two three degrees nose down string midpoint between two leadouts remove guide drill holes bush eyelets tubing paint bolt back place dry Add leadouts youre ready fly can make guide adjustable wish above method will very very close final placement anyway prefer make new guide needed rather carry weight drag time guide could made vertically adjustable its properly located begin wont need vertical adjustment plane flies crooked guide correct place warp some Twist wings proper direction heating heat gun let cool holding new setting After couple tries model will flying level wings way heat gun also works paint paper just plastic film no flaps tweak tabs ugly way 38 Special trims flies just like other profile stunter ended up using 11 x 6 Master Airscrew wood prop 5% nitro Taffender PA fuel 275 venturi 63-foot lines Lap times about 52 53 seconds landing gear location shown pavement model can put down mains rolled half lap before tall wheel comes down Enjoy 38 Special fly safely ers Editor Continued page 5 also trust article will continue promote model float flying article has already aroused interest have received quite lengthy letter requesting information advice phone call net result being fellow modeler will visit September 25 weather permitting will go course float flying So again thank very much third-to-last paragraph p 24 suggested written column feature could started relating fascinating aspects model float flying offer still standsI am trying return great hobby/sport small portion what have received abundance trust will forgive audacity conclusion please let thank once again let know way can help Jim Halls Johnson Vermont Still Another Viewpoint Im beginning novice truest sense word pattern flier recently competed first pattern contest North Coast Pattern Championship Cleveland showed up bright early Saturday morning older Tipo backup air plane older FM radio does have dual conversion receiver didnt want risk good airplane fearing firstcontest nerves equals dumb thumbs may turn trash Trying get couple practice flights before contest realized old radio wouldnt cut frequencycongested skies Cleveland After takeoff marginal control landed uneventfully yes did range check before flight Locating CD Mike Kline regis tration building informed him old Continued page 153 22 Model Aviation 4in. — olt12A H$1200 l2VoIt 65AH$1600 VISA MASTERCARD DISCOVER $400 SHIPPING & HANDLING AX FOR FL RESIDENTS KULPRIT THE ULTIMATE IN COMBAT COMPLETE KIT $3500 WING KITS$1750 ENGINE SIZE 20 40 WING AREA S40 50 IN WEIGHT2S-3SLBSI _______ R&B PRODUCTS 318-747-5331 2503 LAVONNE nOSSIER CITY LA 71111