U 0 Bob Dolly Wischer SCALE INSTRUMENT panels can produced photographically technique quite simple anyone having camera will focus close subject equipped inexpensive close-up lens attachment Full-size instruments must available either plane being modeled similar plane order certain image size negative will correct would need reduced enlarged later focus distance must found done placing small piece tracing paper camera back open re moved paper exact position normally occupied film shutter held open diaphragm its largest opening inverted image will appear paper can measured compared size subject being viewed usual pro cedure cut disc cardboard ap proximately diameter full-size strument focus disc Scaie moving camera until image paper proper size depending scale model As example 2 1 model has scale ratio 6 1 12 di vided 26 disc 3-in di ameter image paper should divided 6 ½ camera disc moved until image measures focus setting noted instance focus distance would likely area 20 Now scene shifts airport have obtained permission plane owner photograph instru ment panel camera lens pre-focused 20 Either measuring tape rule observing sharply focused viewfinder now know photo about made will have instrument diameter exactly right size proceed photograph individual instrument Contact prints made negatives can cut out cemented back instrument panel very realistic model single lens reflex type 35mm camera close focusing wide-angle lens having focal length 35mm ideal setup method lenses usually permit focusing close distances little 9 lens use objection method produc ing panel reflection glass strument face can avoided use polarizing filter over lens have never used filter because reflec tions actually add realism Sitting cockpit plane reflections can seen instrument face absence model panel things connotes model rather full size last two world champions used technique winning planes photos being taken wise observe whether struments have color faces system described uses black white materials color can added touching up watercolor paint last bit realism Using color photo graphic materials complicates process because commercial processors make enlargements would involve another ratio calculations Photos should printed glossy paper above aver Con tinued pare 91 20 Model Aviation Simple effective instrument panel Bob Underwoods Bonso ternal structure rivets add models scale effectiveness instruments Bob Wischers world champ Emeraude pro duced photo method surrounded turned aluminum bezel Instrument panel cockpit interior German champion Bruno Klupps Zlin 42 Note raised floor make room electronic gear common fault results lost scale points Excellent panel detailed cockpit Fournier RF6B entered 1976 World Championships Pierre Koppe France lZeef DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDEFOR OTS EVERY TIMEI black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf onlyLARGE HINGES dard size holes match type GUIDE FOR hinges drilling 3 stan 195I-hinge choose use BALSA PICKER PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA keep Terrys fast time year 1 16 10 Rex Raymond went win Stan dard Class perfect score 24 points six heats Rex 71 years young Rex fast time 12255 bad Standard Class guess will see Rex Expert Class now onhis time fastest Standard week end Yoshihiko Murahami put Prather Toni through number-three pylon fourth round Sunday morning Upon inspecting pylon after impact Ron Schore Barks contest management decided pylons will have con structed sturdier material Toni went through 3/S plywood side pylon through plywood opposite side pylon future pylons will constructed ood impact side /2 plywood other side canvas bag hung inside pylon incident brought light fact pylons afford protection necessary pylon-cut judges ad dition stronger pylons con sidering some sort body protection pylon workers protection could either flak type vest used mili tary baseball catchers chest protector NMPRA districts should check equipment sure ade quate protection workers product review product review product review Pneumatic Disc Brake TaxiMaster air op erated disc brake system comprises two basic parts disc hub engages spokes 2W larger 6-spoke wheels backing platea shallow air cylinder dual ring piston cork face Piston geared cylinder prevent rotation cylinder se cures 5/32 axle lock screw sembled axle pushed together cylind er filled piston reducing air consump tion line control valve pneumatic retracts used Sonic supply tank fill valve required Provides positive stopping power planes up 15 lbs though 2 units main gear recommended weights over 8 lbs Price $1595 Sonic Supply Tank $315 fill valve $490 Sonic Systems P 0 Box 192 Whippany NJ 07981 product review product review product review everybody good time plenty excitement racing year Bakersfield hope have another good next year Dave Lane 4477 1 36th Hawthorne CA 902S0 RC Scale/Wischers continued page 20 age contrast maximum effectiveness usual clear plastic face over instru ment can omitted things panels other instruments photos very use ful also data precise locations sizes such things knobs switches can photographed same fo cus setting used instruments Measurements taken photos will assure detail proper size Nothing destroys scale effectiveness like switches obviously over under size Choosing subject selecting subject scale modeler faced important decisions trainer built kit can constructed short time will bring almost certain success Chances suc cess experienced flier kitbuilt scale model also good better wise selection subject September1977 91 scratch builder likely con test flier has wide open choice someone builds flies Gee Bee Su persportster indicates top pilot same would true multi-engine planes other extreme light plane such Piper Cub places little demand pilot ability contest work element apparent pilot ability important since judges will believe him competent choice subject makes him look bad planes long tail moment slender lightweight fuselage likely possess stability smooth effortless flight worst combination would short tail fuselage small tail surfaces Gee Bee other clas sic racing planes examples type approach stall usually ends disaster Takeoff landing characteristics such highly skilled pilots can expect success Extreme opposites World War Sop withs Bristols monstrous sta bilizers afford greatest possible stabil ity Sopwith 1 Strutter has stabil izer large has never possible make three-point landing full up elevator due ground-cushion ef fect prototype aircraft same problem partially solved use barn-door flaps lower wing As mod els planes have gentle docile flight habits make real pleas ure fly particularly slow speed too scale models exhibit vicious natures recent trend toward larger models disadvantages due higher cost transportation dif ficulties has observation planes easily capable scale-like flight introduction new prop drive units lack power no longer reason build larger model available kits large sizes begin look attractive choice subject widened considerably sport-scale model can expected take twice time required sport plane full-scale type five ten times long Choosing subject has abundant information available decreases research burden thereby increases chance successful completion heavy investment construction time means selection subject should taken lightly An effort being made form na tional scale organization similar formed pattern pylon soaring other groups working AMA purpose group pro vide technical help areas such subject selection documentation construction competition rules material listings evalu ations aid team selection proc ess Interested scale modelers whether free flight control line radio control should write Bob Underwood MORE wM4i3o1Ir 00 same powerYELLOW 4 e6edpitPROPELL eB ~Taco o O90-53 54 e 4 308 Blade63 64358 er74 76 78 508 -each84 86 88 668 949697 q 64 358iO4 106858 5-6114 116 1181 9-6106 1 AC 124 3 Blade Tractort2 5 176150 5-354 6364 508 ORISH 3 Blade Pusher Bk OS 63ST JOHN INDIANA 46373 SCALE DA/p5CART ACE KITS 0 PLANSACCESSORIES REAIIMGE 4REAL JAPANESE TISSLIE-FEOPS j7~OXBAT BROWN CO-2 ENGINES MORRISON17 SPAN COMPLETE CATALOG 50s 1977 CATALOG KIT $4 25MANY HARD TO FIND ITEMS TECN 48500 MC KENZ E HWY P P InniaPIoiia VIDA OREGON 97488BOX 2498LA MESA CALIF 92041 4109 Concord Oaks Dr St Louis Mo 63128 Bob Dolly Wischer RT 1 S-221 Lapham Peak Rd Delafield WI 53018 Farman/J ohnson continued page 47 down-thrust Shark also differs use metal cylinder considerably larger di ameter nylon Telco prop nut rather bolt Telco plated tank Both powerplants uti lize charging gun fits snugly onto nipple-type fitting Early-on Telco nipple nylon recent ex amples have metal fitting charg ing gun does Shark principal mechanical difference tween three engines method speed control three use poppet valves admit gas opening piston strikes top dead center Speed proportionate far poppet dis placed gas admitted faster rpm shorter duration Brown Shark engines adjust C02 volume screwing cylinder up down whereas Telco crankshaft mounted eccentric bearing crankshaft bearing rotated knurled aluminum flange located immedi ately behind prop Raising lowering shaft corresponds remarkably ad vancing retarding spark lever old ignition engines Model As first-effort trainer CO2 power Farman ideal small compact sturdy yet being biplane has oodles wing area make its flight real istic Besides feels like making other run-of-the-mill monoplane Boxy construction straight lines plus verti cal cabane struts make easy build align Although previous models devel oped around Brown CO2 have spans 16-18 inches weigh 20-30 grams Farman Sport has larger area weight Recognizing average hobby shop does stock indoor wood indoor building techniques rather exotic modelers interested trying CO2 scale first time set out develop sturdy trainer model pleasing appearance Much de light resultant model has above-aver age flying ability Average flights outdoors have 30-40 second range several frightening near OOS thermal ones well over two minutes Construction First step purchase sheet light 1/16 3 balsa Pick sheet deal ers rack long grained flaws warps dealer stocks Contest Balsa selection will simplified hut suitable piece can found regular sheet 1/32 basswood no longer exotic item advent Rev Prod ucts basswood line wheels avail able mail Peck Polymers Wil liams Brothers vintage wheels could substituted penalty few grams Cut out two identical fuselage sides 1/16 X 1/16 balsa vertical reinforcements positioned Hot Stuff Jet mers cut noting grain direction Drill bolt holes align sides assemble September 1977 93
Edition: Model Aviation - 1977/09
Page Numbers: 20, 91, 93
U 0 Bob Dolly Wischer SCALE INSTRUMENT panels can produced photographically technique quite simple anyone having camera will focus close subject equipped inexpensive close-up lens attachment Full-size instruments must available either plane being modeled similar plane order certain image size negative will correct would need reduced enlarged later focus distance must found done placing small piece tracing paper camera back open re moved paper exact position normally occupied film shutter held open diaphragm its largest opening inverted image will appear paper can measured compared size subject being viewed usual pro cedure cut disc cardboard ap proximately diameter full-size strument focus disc Scaie moving camera until image paper proper size depending scale model As example 2 1 model has scale ratio 6 1 12 di vided 26 disc 3-in di ameter image paper should divided 6 ½ camera disc moved until image measures focus setting noted instance focus distance would likely area 20 Now scene shifts airport have obtained permission plane owner photograph instru ment panel camera lens pre-focused 20 Either measuring tape rule observing sharply focused viewfinder now know photo about made will have instrument diameter exactly right size proceed photograph individual instrument Contact prints made negatives can cut out cemented back instrument panel very realistic model single lens reflex type 35mm camera close focusing wide-angle lens having focal length 35mm ideal setup method lenses usually permit focusing close distances little 9 lens use objection method produc ing panel reflection glass strument face can avoided use polarizing filter over lens have never used filter because reflec tions actually add realism Sitting cockpit plane reflections can seen instrument face absence model panel things connotes model rather full size last two world champions used technique winning planes photos being taken wise observe whether struments have color faces system described uses black white materials color can added touching up watercolor paint last bit realism Using color photo graphic materials complicates process because commercial processors make enlargements would involve another ratio calculations Photos should printed glossy paper above aver Con tinued pare 91 20 Model Aviation Simple effective instrument panel Bob Underwoods Bonso ternal structure rivets add models scale effectiveness instruments Bob Wischers world champ Emeraude pro duced photo method surrounded turned aluminum bezel Instrument panel cockpit interior German champion Bruno Klupps Zlin 42 Note raised floor make room electronic gear common fault results lost scale points Excellent panel detailed cockpit Fournier RF6B entered 1976 World Championships Pierre Koppe France lZeef DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDEFOR OTS EVERY TIMEI black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf onlyLARGE HINGES dard size holes match type GUIDE FOR hinges drilling 3 stan 195I-hinge choose use BALSA PICKER PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA keep Terrys fast time year 1 16 10 Rex Raymond went win Stan dard Class perfect score 24 points six heats Rex 71 years young Rex fast time 12255 bad Standard Class guess will see Rex Expert Class now onhis time fastest Standard week end Yoshihiko Murahami put Prather Toni through number-three pylon fourth round Sunday morning Upon inspecting pylon after impact Ron Schore Barks contest management decided pylons will have con structed sturdier material Toni went through 3/S plywood side pylon through plywood opposite side pylon future pylons will constructed ood impact side /2 plywood other side canvas bag hung inside pylon incident brought light fact pylons afford protection necessary pylon-cut judges ad dition stronger pylons con sidering some sort body protection pylon workers protection could either flak type vest used mili tary baseball catchers chest protector NMPRA districts should check equipment sure ade quate protection workers product review product review product review Pneumatic Disc Brake TaxiMaster air op erated disc brake system comprises two basic parts disc hub engages spokes 2W larger 6-spoke wheels backing platea shallow air cylinder dual ring piston cork face Piston geared cylinder prevent rotation cylinder se cures 5/32 axle lock screw sembled axle pushed together cylind er filled piston reducing air consump tion line control valve pneumatic retracts used Sonic supply tank fill valve required Provides positive stopping power planes up 15 lbs though 2 units main gear recommended weights over 8 lbs Price $1595 Sonic Supply Tank $315 fill valve $490 Sonic Systems P 0 Box 192 Whippany NJ 07981 product review product review product review everybody good time plenty excitement racing year Bakersfield hope have another good next year Dave Lane 4477 1 36th Hawthorne CA 902S0 RC Scale/Wischers continued page 20 age contrast maximum effectiveness usual clear plastic face over instru ment can omitted things panels other instruments photos very use ful also data precise locations sizes such things knobs switches can photographed same fo cus setting used instruments Measurements taken photos will assure detail proper size Nothing destroys scale effectiveness like switches obviously over under size Choosing subject selecting subject scale modeler faced important decisions trainer built kit can constructed short time will bring almost certain success Chances suc cess experienced flier kitbuilt scale model also good better wise selection subject September1977 91 scratch builder likely con test flier has wide open choice someone builds flies Gee Bee Su persportster indicates top pilot same would true multi-engine planes other extreme light plane such Piper Cub places little demand pilot ability contest work element apparent pilot ability important since judges will believe him competent choice subject makes him look bad planes long tail moment slender lightweight fuselage likely possess stability smooth effortless flight worst combination would short tail fuselage small tail surfaces Gee Bee other clas sic racing planes examples type approach stall usually ends disaster Takeoff landing characteristics such highly skilled pilots can expect success Extreme opposites World War Sop withs Bristols monstrous sta bilizers afford greatest possible stabil ity Sopwith 1 Strutter has stabil izer large has never possible make three-point landing full up elevator due ground-cushion ef fect prototype aircraft same problem partially solved use barn-door flaps lower wing As mod els planes have gentle docile flight habits make real pleas ure fly particularly slow speed too scale models exhibit vicious natures recent trend toward larger models disadvantages due higher cost transportation dif ficulties has observation planes easily capable scale-like flight introduction new prop drive units lack power no longer reason build larger model available kits large sizes begin look attractive choice subject widened considerably sport-scale model can expected take twice time required sport plane full-scale type five ten times long Choosing subject has abundant information available decreases research burden thereby increases chance successful completion heavy investment construction time means selection subject should taken lightly An effort being made form na tional scale organization similar formed pattern pylon soaring other groups working AMA purpose group pro vide technical help areas such subject selection documentation construction competition rules material listings evalu ations aid team selection proc ess Interested scale modelers whether free flight control line radio control should write Bob Underwood MORE wM4i3o1Ir 00 same powerYELLOW 4 e6edpitPROPELL eB ~Taco o O90-53 54 e 4 308 Blade63 64358 er74 76 78 508 -each84 86 88 668 949697 q 64 358iO4 106858 5-6114 116 1181 9-6106 1 AC 124 3 Blade Tractort2 5 176150 5-354 6364 508 ORISH 3 Blade Pusher Bk OS 63ST JOHN INDIANA 46373 SCALE DA/p5CART ACE KITS 0 PLANSACCESSORIES REAIIMGE 4REAL JAPANESE TISSLIE-FEOPS j7~OXBAT BROWN CO-2 ENGINES MORRISON17 SPAN COMPLETE CATALOG 50s 1977 CATALOG KIT $4 25MANY HARD TO FIND ITEMS TECN 48500 MC KENZ E HWY P P InniaPIoiia VIDA OREGON 97488BOX 2498LA MESA CALIF 92041 4109 Concord Oaks Dr St Louis Mo 63128 Bob Dolly Wischer RT 1 S-221 Lapham Peak Rd Delafield WI 53018 Farman/J ohnson continued page 47 down-thrust Shark also differs use metal cylinder considerably larger di ameter nylon Telco prop nut rather bolt Telco plated tank Both powerplants uti lize charging gun fits snugly onto nipple-type fitting Early-on Telco nipple nylon recent ex amples have metal fitting charg ing gun does Shark principal mechanical difference tween three engines method speed control three use poppet valves admit gas opening piston strikes top dead center Speed proportionate far poppet dis placed gas admitted faster rpm shorter duration Brown Shark engines adjust C02 volume screwing cylinder up down whereas Telco crankshaft mounted eccentric bearing crankshaft bearing rotated knurled aluminum flange located immedi ately behind prop Raising lowering shaft corresponds remarkably ad vancing retarding spark lever old ignition engines Model As first-effort trainer CO2 power Farman ideal small compact sturdy yet being biplane has oodles wing area make its flight real istic Besides feels like making other run-of-the-mill monoplane Boxy construction straight lines plus verti cal cabane struts make easy build align Although previous models devel oped around Brown CO2 have spans 16-18 inches weigh 20-30 grams Farman Sport has larger area weight Recognizing average hobby shop does stock indoor wood indoor building techniques rather exotic modelers interested trying CO2 scale first time set out develop sturdy trainer model pleasing appearance Much de light resultant model has above-aver age flying ability Average flights outdoors have 30-40 second range several frightening near OOS thermal ones well over two minutes Construction First step purchase sheet light 1/16 3 balsa Pick sheet deal ers rack long grained flaws warps dealer stocks Contest Balsa selection will simplified hut suitable piece can found regular sheet 1/32 basswood no longer exotic item advent Rev Prod ucts basswood line wheels avail able mail Peck Polymers Wil liams Brothers vintage wheels could substituted penalty few grams Cut out two identical fuselage sides 1/16 X 1/16 balsa vertical reinforcements positioned Hot Stuff Jet mers cut noting grain direction Drill bolt holes align sides assemble September 1977 93
Edition: Model Aviation - 1977/09
Page Numbers: 20, 91, 93
U 0 Bob Dolly Wischer SCALE INSTRUMENT panels can produced photographically technique quite simple anyone having camera will focus close subject equipped inexpensive close-up lens attachment Full-size instruments must available either plane being modeled similar plane order certain image size negative will correct would need reduced enlarged later focus distance must found done placing small piece tracing paper camera back open re moved paper exact position normally occupied film shutter held open diaphragm its largest opening inverted image will appear paper can measured compared size subject being viewed usual pro cedure cut disc cardboard ap proximately diameter full-size strument focus disc Scaie moving camera until image paper proper size depending scale model As example 2 1 model has scale ratio 6 1 12 di vided 26 disc 3-in di ameter image paper should divided 6 ½ camera disc moved until image measures focus setting noted instance focus distance would likely area 20 Now scene shifts airport have obtained permission plane owner photograph instru ment panel camera lens pre-focused 20 Either measuring tape rule observing sharply focused viewfinder now know photo about made will have instrument diameter exactly right size proceed photograph individual instrument Contact prints made negatives can cut out cemented back instrument panel very realistic model single lens reflex type 35mm camera close focusing wide-angle lens having focal length 35mm ideal setup method lenses usually permit focusing close distances little 9 lens use objection method produc ing panel reflection glass strument face can avoided use polarizing filter over lens have never used filter because reflec tions actually add realism Sitting cockpit plane reflections can seen instrument face absence model panel things connotes model rather full size last two world champions used technique winning planes photos being taken wise observe whether struments have color faces system described uses black white materials color can added touching up watercolor paint last bit realism Using color photo graphic materials complicates process because commercial processors make enlargements would involve another ratio calculations Photos should printed glossy paper above aver Con tinued pare 91 20 Model Aviation Simple effective instrument panel Bob Underwoods Bonso ternal structure rivets add models scale effectiveness instruments Bob Wischers world champ Emeraude pro duced photo method surrounded turned aluminum bezel Instrument panel cockpit interior German champion Bruno Klupps Zlin 42 Note raised floor make room electronic gear common fault results lost scale points Excellent panel detailed cockpit Fournier RF6B entered 1976 World Championships Pierre Koppe France lZeef DUBRO KWIK- HINGE SLOTTER FOR LARGE AND SMALL HINGES THE ONLY UNIVERSAL SLOTTING HOLETOOL THAT NOT ONLY CENTERS CENTERINGBUT GUIDES YOUR BLADE FOR CatHINGESPERFECTLY ALIGNED HINGE GUIDEFOR OTS EVERY TIMEI black oxided hardened steel 216blades fit neatly no 2 x-acto knife handle work conjunction handy alignment jig features 3 interchangeable snap-on BLADE ANDguides Two large small leaf onlyLARGE HINGES dard size holes match type GUIDE FOR hinges drilling 3 stan 195I-hinge choose use BALSA PICKER PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA keep Terrys fast time year 1 16 10 Rex Raymond went win Stan dard Class perfect score 24 points six heats Rex 71 years young Rex fast time 12255 bad Standard Class guess will see Rex Expert Class now onhis time fastest Standard week end Yoshihiko Murahami put Prather Toni through number-three pylon fourth round Sunday morning Upon inspecting pylon after impact Ron Schore Barks contest management decided pylons will have con structed sturdier material Toni went through 3/S plywood side pylon through plywood opposite side pylon future pylons will constructed ood impact side /2 plywood other side canvas bag hung inside pylon incident brought light fact pylons afford protection necessary pylon-cut judges ad dition stronger pylons con sidering some sort body protection pylon workers protection could either flak type vest used mili tary baseball catchers chest protector NMPRA districts should check equipment sure ade quate protection workers product review product review product review Pneumatic Disc Brake TaxiMaster air op erated disc brake system comprises two basic parts disc hub engages spokes 2W larger 6-spoke wheels backing platea shallow air cylinder dual ring piston cork face Piston geared cylinder prevent rotation cylinder se cures 5/32 axle lock screw sembled axle pushed together cylind er filled piston reducing air consump tion line control valve pneumatic retracts used Sonic supply tank fill valve required Provides positive stopping power planes up 15 lbs though 2 units main gear recommended weights over 8 lbs Price $1595 Sonic Supply Tank $315 fill valve $490 Sonic Systems P 0 Box 192 Whippany NJ 07981 product review product review product review everybody good time plenty excitement racing year Bakersfield hope have another good next year Dave Lane 4477 1 36th Hawthorne CA 902S0 RC Scale/Wischers continued page 20 age contrast maximum effectiveness usual clear plastic face over instru ment can omitted things panels other instruments photos very use ful also data precise locations sizes such things knobs switches can photographed same fo cus setting used instruments Measurements taken photos will assure detail proper size Nothing destroys scale effectiveness like switches obviously over under size Choosing subject selecting subject scale modeler faced important decisions trainer built kit can constructed short time will bring almost certain success Chances suc cess experienced flier kitbuilt scale model also good better wise selection subject September1977 91 scratch builder likely con test flier has wide open choice someone builds flies Gee Bee Su persportster indicates top pilot same would true multi-engine planes other extreme light plane such Piper Cub places little demand pilot ability contest work element apparent pilot ability important since judges will believe him competent choice subject makes him look bad planes long tail moment slender lightweight fuselage likely possess stability smooth effortless flight worst combination would short tail fuselage small tail surfaces Gee Bee other clas sic racing planes examples type approach stall usually ends disaster Takeoff landing characteristics such highly skilled pilots can expect success Extreme opposites World War Sop withs Bristols monstrous sta bilizers afford greatest possible stabil ity Sopwith 1 Strutter has stabil izer large has never possible make three-point landing full up elevator due ground-cushion ef fect prototype aircraft same problem partially solved use barn-door flaps lower wing As mod els planes have gentle docile flight habits make real pleas ure fly particularly slow speed too scale models exhibit vicious natures recent trend toward larger models disadvantages due higher cost transportation dif ficulties has observation planes easily capable scale-like flight introduction new prop drive units lack power no longer reason build larger model available kits large sizes begin look attractive choice subject widened considerably sport-scale model can expected take twice time required sport plane full-scale type five ten times long Choosing subject has abundant information available decreases research burden thereby increases chance successful completion heavy investment construction time means selection subject should taken lightly An effort being made form na tional scale organization similar formed pattern pylon soaring other groups working AMA purpose group pro vide technical help areas such subject selection documentation construction competition rules material listings evalu ations aid team selection proc ess Interested scale modelers whether free flight control line radio control should write Bob Underwood MORE wM4i3o1Ir 00 same powerYELLOW 4 e6edpitPROPELL eB ~Taco o O90-53 54 e 4 308 Blade63 64358 er74 76 78 508 -each84 86 88 668 949697 q 64 358iO4 106858 5-6114 116 1181 9-6106 1 AC 124 3 Blade Tractort2 5 176150 5-354 6364 508 ORISH 3 Blade Pusher Bk OS 63ST JOHN INDIANA 46373 SCALE DA/p5CART ACE KITS 0 PLANSACCESSORIES REAIIMGE 4REAL JAPANESE TISSLIE-FEOPS j7~OXBAT BROWN CO-2 ENGINES MORRISON17 SPAN COMPLETE CATALOG 50s 1977 CATALOG KIT $4 25MANY HARD TO FIND ITEMS TECN 48500 MC KENZ E HWY P P InniaPIoiia VIDA OREGON 97488BOX 2498LA MESA CALIF 92041 4109 Concord Oaks Dr St Louis Mo 63128 Bob Dolly Wischer RT 1 S-221 Lapham Peak Rd Delafield WI 53018 Farman/J ohnson continued page 47 down-thrust Shark also differs use metal cylinder considerably larger di ameter nylon Telco prop nut rather bolt Telco plated tank Both powerplants uti lize charging gun fits snugly onto nipple-type fitting Early-on Telco nipple nylon recent ex amples have metal fitting charg ing gun does Shark principal mechanical difference tween three engines method speed control three use poppet valves admit gas opening piston strikes top dead center Speed proportionate far poppet dis placed gas admitted faster rpm shorter duration Brown Shark engines adjust C02 volume screwing cylinder up down whereas Telco crankshaft mounted eccentric bearing crankshaft bearing rotated knurled aluminum flange located immedi ately behind prop Raising lowering shaft corresponds remarkably ad vancing retarding spark lever old ignition engines Model As first-effort trainer CO2 power Farman ideal small compact sturdy yet being biplane has oodles wing area make its flight real istic Besides feels like making other run-of-the-mill monoplane Boxy construction straight lines plus verti cal cabane struts make easy build align Although previous models devel oped around Brown CO2 have spans 16-18 inches weigh 20-30 grams Farman Sport has larger area weight Recognizing average hobby shop does stock indoor wood indoor building techniques rather exotic modelers interested trying CO2 scale first time set out develop sturdy trainer model pleasing appearance Much de light resultant model has above-aver age flying ability Average flights outdoors have 30-40 second range several frightening near OOS thermal ones well over two minutes Construction First step purchase sheet light 1/16 3 balsa Pick sheet deal ers rack long grained flaws warps dealer stocks Contest Balsa selection will simplified hut suitable piece can found regular sheet 1/32 basswood no longer exotic item advent Rev Prod ucts basswood line wheels avail able mail Peck Polymers Wil liams Brothers vintage wheels could substituted penalty few grams Cut out two identical fuselage sides 1/16 X 1/16 balsa vertical reinforcements positioned Hot Stuff Jet mers cut noting grain direction Drill bolt holes align sides assemble September 1977 93