Authors Note have received several letters concerning FAI control-line Speed ap pears growing interest event hope indicator speed will make positive comeback Since active interest FAI Speed have asked Charles Lieber write months column Charles member 1978 FAI Speed team sent England Championships placed fifth overall performance FAI Speed requires dedicated speed modeler overcome some problems thatarise seems times no solution feel Charles type person bring FAI Speed special charisma WHAT FAI Speed Well rules event simple 1 Engine displacement less 1526 Cu 2 fuel 80% methanol 20% lubricant 3 minimum total area 7755 sq 15 engine 4 maximum area loading 1764 oz 15 engine 5 line length 522 ft 6 aircraft must ROG fly two nontimed laps plus ten timed laps after pilot enters pylon yoke 7 aircraft must remain within 3-to 10-ft altitude band control handle must leave pylon yoke Prior entering pylon whipping allowed design airplane has evolved upright engine symmetric planform layouts presently favored high-aspect-ratio asym metric sidewinder designs Chuck Schuette asymmetric upright-engine designs Emil Rumpel own airplane medium aspect ratio sidewinder design idea behind high-aspect-ratio asym metric design minimize drag follows 1 Control-line drag wing covering 2 duced wing drag due lift 3 drag due higher speed outboard wings necessary very picky about airplane design because flying same formula top speeds within few tenths second other high-aspect-ratio wing designs have penaities though require accurate location CG very careful piloting windy weather usuai construction airplanes too different AMA types using aiuminum wings wood fiberglass bodies half pans Recent wing construction developments include own fiberglass design aluminum-clad balsa-core design Rumpel Both latter types construction have proven com petition some interest consider quantita tive effects model design speed performance differential model drag below Figure 1 Fig 1 based incremental drag tCD going fully exposed pipe front end protrusions enclosed stream lined pipe placement very clean front end best projected design would lower model drag coefficient best measured wind tunnels about C rag due tAe control lines between 6 8 total system drag depending model configuration event wise reduce line drag possible Under present rules grouping lines forbidden lines must mechanically separated both handle wing use long inner wing will theory reduce line drag increase wing drag fact shown Fig 2 based initial wing covering foot lines Fig 2 shows some measure highaspect-ratio asymmetric airplane presently favored talks FAI engines singular must used engine Rossi R- 15 FI two exceptions am aware Carl Dodges home-built Chuck Schuettes Rossi home-built rear induction Rossi really competitive rework requires careful break-in widely used version ABC type run #1 Rossi plugs stock set-up good enough 1977 land place US team speed 150mph success engine large measure due Chuck Schuette know-how supplied parameters setting proper head clearance correct pipe size required fast repeatable operation gen eral hotter weather head clearance and/or longer pipe will required get engine run doesnt die through 10lap official flight Set clearance between 020024 inches plug will last flights allowing tuning variable plug replacement large amount head clearance also necessary engines 46 Model Aviation especially radical timing develop consistent maximum power During 1978 number modifications made Rossi engines followed lead Emil Rumpel Germany timing changed new pipe design incorporated 1978 timing pipe design shown new timing head clearance 022 good place start engine timing set-up piston cylinder fit fairly critical fit should fairly loose piston sticking little TDC though should determined individually bench running Iran fairly extensive experiments 1977 1978 motors andfound 1977 version should turn around 30000 rpm 1978 version modifications should run approx imately 32000 rpm Kerr K&W 8X3 prop cut 6X3 Exceptional 1978 version engines unfortunately have reported turn same 6X3 34000 rpm numbers bench-marks standard 1977 Rumpel-timed 1978 Rossi engines Engines capable rpm figures good airplane will give very competitive speeds rpm figures can obtained through hard work engine bench running making small changes head clearance piston cylinder fit monitoring rpm variation corresponding changes type scientific approach realistic method obtain good engine fuel systems widespread use uniflow suction system centrifugallyoperated fuel switch-crankcase pressure designs Both used success 1978 World Championships Recently newer system using crankcase pressure operated regulator bladder pressure tank has employed several California fliers particular C Schuette andB Spahr used system 1978 World Champs event use about 25cc fuel get off ground fly 12 laps pylon have few laps margin Prior 1978 bulk fliers concen trated efforts two-bladed propeller design no exception may interest see coordinates 1977 US team trials prop somewhat smaller usual practice has worked well always exceptions rule Chuck Schuette partner Bob Spahr led way use one-bladed prop one-bladed prop has some definite practical advantages over its two-bladed counterpart 1 same airplane engine combination faster 2 prop can positioned stop prop breakage landing minimized eliminated coordinates one-bladed prop used 1978 World Champs given have found survival landing blader plus ability blow plugs men tioned previously absolutely imperative con trolled testing given airplane-engine combi nation using blader very useful have engine shutoff device some kind break blade one-blader engine running remaining counterbalance will explode airplane short order extreme vibration materials have found satis factory one-bladers carbon boron fiber some giass fiber fairly hightemperature epoxy matrix Flying FAI model abit different AMA classes will require some practice matter getting peculiar handle pylon yoke also matter keeping aircraft fairly low airplane flown high lift must generated causes induced drag differential velocity due flight altitude atypical FAI plane shown Fig 3 entering event such FAL always good have expert advice know can buy reliable parts Below abbre viated list people have helpful known supply top quality parts Advice Chuck Schuette 5041 Fanwood Apt *4 Lakewood CA 90713 FM Gazette State-of-art articles Laird Jackson 523 Meadowbrook Circle St Davids PA 19087 Props Tom Kerr 7824 Lexington Ave Philadelphia PA 19152 Walt Perkins 1100 SE 28th St Ocala Florida 32670 Parts Emil Rumpel Vormholzer Ring 32 5810 Witten 3 West Germany r engines fuel systems Jurgen Lenzen Ger manenstrasse 24 5600 Wuppertal 2 West Ger s Rumpel-design asymmetric air plane George Hubschmidt RD No 1 Box 318 Ewan Aura Road Glassboro NJ 0028 Continued page 116 Left The traditional symmetric FAI lob has evolved upright engine asymmetric designs typified Emil Rumpel asymmetric side-winders Chuck Schuette right has played greet years Basic FAI Speed rules given beginning text September 1979 47 NNOUNCINGThe New Instant-Dry f Adhesive Process K Ffl ToSheetFoam Wing Cores new product Corefilm replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has ooated both sides contact adhesive Corefilm ready instant use After oovering wing core 11/2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes 1% wide 36 yard rolls roll will cover over 1900 sq 13 sq dealer direct Write brochure complete line BILL 19216 Calvert Street Reseda CA213/344-6391 Quiet Power -Tatone Makes new super quiet K&B 40 R/C muffler requires machined fit exhaust stack cover Easy no exhaust plugs fittings adaptors Muffler exposed holes Just bolt on.thats itl Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENYA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE 021 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 Add $125 postage handling CA residents add 6% tax Dealer inquiries 1931 Gee Bee Super Spo1Scale General Arrange-I - ment Drawing Catalog 25c W T Bill Given MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 little higilpoints design philosophy resulted Imitation say plane success would unfair understatement facts respects best flying plane have flown terms tight precise corners has few peers experimental features tested Imitation successful results now being incorporated new competition ship Excitation Because relative ease construc tion Imitation should reasonable project builder few profiles under belt Due ts outstanding flying capabilities perfect selection contest machine beginners GET ORGANIZED set 4 st.d ties 00kM Osr 4 years yes taole II eragazeres 4 MAO FILES $495 Seod 5496 pMe $1 00 postage wd taneag DaM iwnuemma PO Box 3M-K DOVER NH 00000 advanced fliers Any builder desires far better average plane practice impressive Sunday barnstorming ought take close look Continued Suggested Reading Fundamentals Aircraft FlightFred erick K Teichmann Hayden Book Co Inc Rochelle Park NJ Aerodynamics forNavalA viatorsIssued Office Chief Naval Opera tions Aviation Training Division Primar ily Chapter Pages 1 through 95 FLY SAFELY CL Speed/Hempel continued tram page 47 eral Speed supplies Rossi engine parts John Newton 2154 Los Padres Drive Rowland Heights CA 91748 lane parts Chuck Schuette-design asymmetric sidewinder Questions concerning article FAI Speed general may addressed Charles Lieber 725 Signal Light Rd Moorestown NJ 08057 Gene Hempel 301 North Yale Dr GarlantL TX 77459 CL Scale/Gretz continued page 48 authentically contoured spinners available parts castof gray epoxy resin ready-to-paint no priming extensive sanding required samples saw ap peared very accurately researched duplicated displayed excellent workmanship Also available firm hand-carved laminated wood scale props suitable WWl vintage kits market also come ready-to-finish include metal hub plates scratch-builders Keeler will make custom props either cast resin wood providing can furnish adequate scale documenta don should include diameter fullsize prop photos drawings possible materials will returned upon completion prop RingAroundthe. Cockpitl oldest tricks scale modeling book using fuel line tubing simulate padded edging normally found around rim open cockpits vintage full-scale aircraft com monly referred cockpit coaming building CL Sport Scale PT-i 9 became reacquainted familiar technique jotted down few notes may interest coaming around cockpits actual full-size PT-19 duplicating made padded black leather type typical older open cockpit aircraft may find some homebuilt types today will have foam rubber edging case need find brand tubing has right diameter wall thickness give correct degree size roundness found some W ID IA OD black neoprene rubber tubing formerly marketed VECO looked just right 10 feet away 1/6th scale modeL After finish complete used sharp #11 X-acto knife cut cockpit openings final shapeThen flat black anti-glare panel painted dry cut piece tubing cockpit slightly longer figure actually needed Use sharp blade again cut through tubing lengthwise along side can opened up slipped over cockpit edge trial fit tubing model first time glue Start end very carefully go way around making certain tubing isflrinly pushed up against balsa edge before cutting itto final length youre completely satisfied will fit desired take off mix up batch slow drying overnight epoxy glue Use piece wire work epoxy inside tubing Slip tubing back place model use plenty pins secure balsa cockpit until glue dries tubing using necessary push pins firmly withdraw just slightly holding tubing back fingers avoid leaving permanent dimple tubing after epoxy 116 Model Aviation
Edition: Model Aviation - 1979/09
Page Numbers: 46, 47, 116
Authors Note have received several letters concerning FAI control-line Speed ap pears growing interest event hope indicator speed will make positive comeback Since active interest FAI Speed have asked Charles Lieber write months column Charles member 1978 FAI Speed team sent England Championships placed fifth overall performance FAI Speed requires dedicated speed modeler overcome some problems thatarise seems times no solution feel Charles type person bring FAI Speed special charisma WHAT FAI Speed Well rules event simple 1 Engine displacement less 1526 Cu 2 fuel 80% methanol 20% lubricant 3 minimum total area 7755 sq 15 engine 4 maximum area loading 1764 oz 15 engine 5 line length 522 ft 6 aircraft must ROG fly two nontimed laps plus ten timed laps after pilot enters pylon yoke 7 aircraft must remain within 3-to 10-ft altitude band control handle must leave pylon yoke Prior entering pylon whipping allowed design airplane has evolved upright engine symmetric planform layouts presently favored high-aspect-ratio asym metric sidewinder designs Chuck Schuette asymmetric upright-engine designs Emil Rumpel own airplane medium aspect ratio sidewinder design idea behind high-aspect-ratio asym metric design minimize drag follows 1 Control-line drag wing covering 2 duced wing drag due lift 3 drag due higher speed outboard wings necessary very picky about airplane design because flying same formula top speeds within few tenths second other high-aspect-ratio wing designs have penaities though require accurate location CG very careful piloting windy weather usuai construction airplanes too different AMA types using aiuminum wings wood fiberglass bodies half pans Recent wing construction developments include own fiberglass design aluminum-clad balsa-core design Rumpel Both latter types construction have proven com petition some interest consider quantita tive effects model design speed performance differential model drag below Figure 1 Fig 1 based incremental drag tCD going fully exposed pipe front end protrusions enclosed stream lined pipe placement very clean front end best projected design would lower model drag coefficient best measured wind tunnels about C rag due tAe control lines between 6 8 total system drag depending model configuration event wise reduce line drag possible Under present rules grouping lines forbidden lines must mechanically separated both handle wing use long inner wing will theory reduce line drag increase wing drag fact shown Fig 2 based initial wing covering foot lines Fig 2 shows some measure highaspect-ratio asymmetric airplane presently favored talks FAI engines singular must used engine Rossi R- 15 FI two exceptions am aware Carl Dodges home-built Chuck Schuettes Rossi home-built rear induction Rossi really competitive rework requires careful break-in widely used version ABC type run #1 Rossi plugs stock set-up good enough 1977 land place US team speed 150mph success engine large measure due Chuck Schuette know-how supplied parameters setting proper head clearance correct pipe size required fast repeatable operation gen eral hotter weather head clearance and/or longer pipe will required get engine run doesnt die through 10lap official flight Set clearance between 020024 inches plug will last flights allowing tuning variable plug replacement large amount head clearance also necessary engines 46 Model Aviation especially radical timing develop consistent maximum power During 1978 number modifications made Rossi engines followed lead Emil Rumpel Germany timing changed new pipe design incorporated 1978 timing pipe design shown new timing head clearance 022 good place start engine timing set-up piston cylinder fit fairly critical fit should fairly loose piston sticking little TDC though should determined individually bench running Iran fairly extensive experiments 1977 1978 motors andfound 1977 version should turn around 30000 rpm 1978 version modifications should run approx imately 32000 rpm Kerr K&W 8X3 prop cut 6X3 Exceptional 1978 version engines unfortunately have reported turn same 6X3 34000 rpm numbers bench-marks standard 1977 Rumpel-timed 1978 Rossi engines Engines capable rpm figures good airplane will give very competitive speeds rpm figures can obtained through hard work engine bench running making small changes head clearance piston cylinder fit monitoring rpm variation corresponding changes type scientific approach realistic method obtain good engine fuel systems widespread use uniflow suction system centrifugallyoperated fuel switch-crankcase pressure designs Both used success 1978 World Championships Recently newer system using crankcase pressure operated regulator bladder pressure tank has employed several California fliers particular C Schuette andB Spahr used system 1978 World Champs event use about 25cc fuel get off ground fly 12 laps pylon have few laps margin Prior 1978 bulk fliers concen trated efforts two-bladed propeller design no exception may interest see coordinates 1977 US team trials prop somewhat smaller usual practice has worked well always exceptions rule Chuck Schuette partner Bob Spahr led way use one-bladed prop one-bladed prop has some definite practical advantages over its two-bladed counterpart 1 same airplane engine combination faster 2 prop can positioned stop prop breakage landing minimized eliminated coordinates one-bladed prop used 1978 World Champs given have found survival landing blader plus ability blow plugs men tioned previously absolutely imperative con trolled testing given airplane-engine combi nation using blader very useful have engine shutoff device some kind break blade one-blader engine running remaining counterbalance will explode airplane short order extreme vibration materials have found satis factory one-bladers carbon boron fiber some giass fiber fairly hightemperature epoxy matrix Flying FAI model abit different AMA classes will require some practice matter getting peculiar handle pylon yoke also matter keeping aircraft fairly low airplane flown high lift must generated causes induced drag differential velocity due flight altitude atypical FAI plane shown Fig 3 entering event such FAL always good have expert advice know can buy reliable parts Below abbre viated list people have helpful known supply top quality parts Advice Chuck Schuette 5041 Fanwood Apt *4 Lakewood CA 90713 FM Gazette State-of-art articles Laird Jackson 523 Meadowbrook Circle St Davids PA 19087 Props Tom Kerr 7824 Lexington Ave Philadelphia PA 19152 Walt Perkins 1100 SE 28th St Ocala Florida 32670 Parts Emil Rumpel Vormholzer Ring 32 5810 Witten 3 West Germany r engines fuel systems Jurgen Lenzen Ger manenstrasse 24 5600 Wuppertal 2 West Ger s Rumpel-design asymmetric air plane George Hubschmidt RD No 1 Box 318 Ewan Aura Road Glassboro NJ 0028 Continued page 116 Left The traditional symmetric FAI lob has evolved upright engine asymmetric designs typified Emil Rumpel asymmetric side-winders Chuck Schuette right has played greet years Basic FAI Speed rules given beginning text September 1979 47 NNOUNCINGThe New Instant-Dry f Adhesive Process K Ffl ToSheetFoam Wing Cores new product Corefilm replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has ooated both sides contact adhesive Corefilm ready instant use After oovering wing core 11/2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes 1% wide 36 yard rolls roll will cover over 1900 sq 13 sq dealer direct Write brochure complete line BILL 19216 Calvert Street Reseda CA213/344-6391 Quiet Power -Tatone Makes new super quiet K&B 40 R/C muffler requires machined fit exhaust stack cover Easy no exhaust plugs fittings adaptors Muffler exposed holes Just bolt on.thats itl Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENYA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE 021 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 Add $125 postage handling CA residents add 6% tax Dealer inquiries 1931 Gee Bee Super Spo1Scale General Arrange-I - ment Drawing Catalog 25c W T Bill Given MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 little higilpoints design philosophy resulted Imitation say plane success would unfair understatement facts respects best flying plane have flown terms tight precise corners has few peers experimental features tested Imitation successful results now being incorporated new competition ship Excitation Because relative ease construc tion Imitation should reasonable project builder few profiles under belt Due ts outstanding flying capabilities perfect selection contest machine beginners GET ORGANIZED set 4 st.d ties 00kM Osr 4 years yes taole II eragazeres 4 MAO FILES $495 Seod 5496 pMe $1 00 postage wd taneag DaM iwnuemma PO Box 3M-K DOVER NH 00000 advanced fliers Any builder desires far better average plane practice impressive Sunday barnstorming ought take close look Continued Suggested Reading Fundamentals Aircraft FlightFred erick K Teichmann Hayden Book Co Inc Rochelle Park NJ Aerodynamics forNavalA viatorsIssued Office Chief Naval Opera tions Aviation Training Division Primar ily Chapter Pages 1 through 95 FLY SAFELY CL Speed/Hempel continued tram page 47 eral Speed supplies Rossi engine parts John Newton 2154 Los Padres Drive Rowland Heights CA 91748 lane parts Chuck Schuette-design asymmetric sidewinder Questions concerning article FAI Speed general may addressed Charles Lieber 725 Signal Light Rd Moorestown NJ 08057 Gene Hempel 301 North Yale Dr GarlantL TX 77459 CL Scale/Gretz continued page 48 authentically contoured spinners available parts castof gray epoxy resin ready-to-paint no priming extensive sanding required samples saw ap peared very accurately researched duplicated displayed excellent workmanship Also available firm hand-carved laminated wood scale props suitable WWl vintage kits market also come ready-to-finish include metal hub plates scratch-builders Keeler will make custom props either cast resin wood providing can furnish adequate scale documenta don should include diameter fullsize prop photos drawings possible materials will returned upon completion prop RingAroundthe. Cockpitl oldest tricks scale modeling book using fuel line tubing simulate padded edging normally found around rim open cockpits vintage full-scale aircraft com monly referred cockpit coaming building CL Sport Scale PT-i 9 became reacquainted familiar technique jotted down few notes may interest coaming around cockpits actual full-size PT-19 duplicating made padded black leather type typical older open cockpit aircraft may find some homebuilt types today will have foam rubber edging case need find brand tubing has right diameter wall thickness give correct degree size roundness found some W ID IA OD black neoprene rubber tubing formerly marketed VECO looked just right 10 feet away 1/6th scale modeL After finish complete used sharp #11 X-acto knife cut cockpit openings final shapeThen flat black anti-glare panel painted dry cut piece tubing cockpit slightly longer figure actually needed Use sharp blade again cut through tubing lengthwise along side can opened up slipped over cockpit edge trial fit tubing model first time glue Start end very carefully go way around making certain tubing isflrinly pushed up against balsa edge before cutting itto final length youre completely satisfied will fit desired take off mix up batch slow drying overnight epoxy glue Use piece wire work epoxy inside tubing Slip tubing back place model use plenty pins secure balsa cockpit until glue dries tubing using necessary push pins firmly withdraw just slightly holding tubing back fingers avoid leaving permanent dimple tubing after epoxy 116 Model Aviation
Edition: Model Aviation - 1979/09
Page Numbers: 46, 47, 116
Authors Note have received several letters concerning FAI control-line Speed ap pears growing interest event hope indicator speed will make positive comeback Since active interest FAI Speed have asked Charles Lieber write months column Charles member 1978 FAI Speed team sent England Championships placed fifth overall performance FAI Speed requires dedicated speed modeler overcome some problems thatarise seems times no solution feel Charles type person bring FAI Speed special charisma WHAT FAI Speed Well rules event simple 1 Engine displacement less 1526 Cu 2 fuel 80% methanol 20% lubricant 3 minimum total area 7755 sq 15 engine 4 maximum area loading 1764 oz 15 engine 5 line length 522 ft 6 aircraft must ROG fly two nontimed laps plus ten timed laps after pilot enters pylon yoke 7 aircraft must remain within 3-to 10-ft altitude band control handle must leave pylon yoke Prior entering pylon whipping allowed design airplane has evolved upright engine symmetric planform layouts presently favored high-aspect-ratio asym metric sidewinder designs Chuck Schuette asymmetric upright-engine designs Emil Rumpel own airplane medium aspect ratio sidewinder design idea behind high-aspect-ratio asym metric design minimize drag follows 1 Control-line drag wing covering 2 duced wing drag due lift 3 drag due higher speed outboard wings necessary very picky about airplane design because flying same formula top speeds within few tenths second other high-aspect-ratio wing designs have penaities though require accurate location CG very careful piloting windy weather usuai construction airplanes too different AMA types using aiuminum wings wood fiberglass bodies half pans Recent wing construction developments include own fiberglass design aluminum-clad balsa-core design Rumpel Both latter types construction have proven com petition some interest consider quantita tive effects model design speed performance differential model drag below Figure 1 Fig 1 based incremental drag tCD going fully exposed pipe front end protrusions enclosed stream lined pipe placement very clean front end best projected design would lower model drag coefficient best measured wind tunnels about C rag due tAe control lines between 6 8 total system drag depending model configuration event wise reduce line drag possible Under present rules grouping lines forbidden lines must mechanically separated both handle wing use long inner wing will theory reduce line drag increase wing drag fact shown Fig 2 based initial wing covering foot lines Fig 2 shows some measure highaspect-ratio asymmetric airplane presently favored talks FAI engines singular must used engine Rossi R- 15 FI two exceptions am aware Carl Dodges home-built Chuck Schuettes Rossi home-built rear induction Rossi really competitive rework requires careful break-in widely used version ABC type run #1 Rossi plugs stock set-up good enough 1977 land place US team speed 150mph success engine large measure due Chuck Schuette know-how supplied parameters setting proper head clearance correct pipe size required fast repeatable operation gen eral hotter weather head clearance and/or longer pipe will required get engine run doesnt die through 10lap official flight Set clearance between 020024 inches plug will last flights allowing tuning variable plug replacement large amount head clearance also necessary engines 46 Model Aviation especially radical timing develop consistent maximum power During 1978 number modifications made Rossi engines followed lead Emil Rumpel Germany timing changed new pipe design incorporated 1978 timing pipe design shown new timing head clearance 022 good place start engine timing set-up piston cylinder fit fairly critical fit should fairly loose piston sticking little TDC though should determined individually bench running Iran fairly extensive experiments 1977 1978 motors andfound 1977 version should turn around 30000 rpm 1978 version modifications should run approx imately 32000 rpm Kerr K&W 8X3 prop cut 6X3 Exceptional 1978 version engines unfortunately have reported turn same 6X3 34000 rpm numbers bench-marks standard 1977 Rumpel-timed 1978 Rossi engines Engines capable rpm figures good airplane will give very competitive speeds rpm figures can obtained through hard work engine bench running making small changes head clearance piston cylinder fit monitoring rpm variation corresponding changes type scientific approach realistic method obtain good engine fuel systems widespread use uniflow suction system centrifugallyoperated fuel switch-crankcase pressure designs Both used success 1978 World Championships Recently newer system using crankcase pressure operated regulator bladder pressure tank has employed several California fliers particular C Schuette andB Spahr used system 1978 World Champs event use about 25cc fuel get off ground fly 12 laps pylon have few laps margin Prior 1978 bulk fliers concen trated efforts two-bladed propeller design no exception may interest see coordinates 1977 US team trials prop somewhat smaller usual practice has worked well always exceptions rule Chuck Schuette partner Bob Spahr led way use one-bladed prop one-bladed prop has some definite practical advantages over its two-bladed counterpart 1 same airplane engine combination faster 2 prop can positioned stop prop breakage landing minimized eliminated coordinates one-bladed prop used 1978 World Champs given have found survival landing blader plus ability blow plugs men tioned previously absolutely imperative con trolled testing given airplane-engine combi nation using blader very useful have engine shutoff device some kind break blade one-blader engine running remaining counterbalance will explode airplane short order extreme vibration materials have found satis factory one-bladers carbon boron fiber some giass fiber fairly hightemperature epoxy matrix Flying FAI model abit different AMA classes will require some practice matter getting peculiar handle pylon yoke also matter keeping aircraft fairly low airplane flown high lift must generated causes induced drag differential velocity due flight altitude atypical FAI plane shown Fig 3 entering event such FAL always good have expert advice know can buy reliable parts Below abbre viated list people have helpful known supply top quality parts Advice Chuck Schuette 5041 Fanwood Apt *4 Lakewood CA 90713 FM Gazette State-of-art articles Laird Jackson 523 Meadowbrook Circle St Davids PA 19087 Props Tom Kerr 7824 Lexington Ave Philadelphia PA 19152 Walt Perkins 1100 SE 28th St Ocala Florida 32670 Parts Emil Rumpel Vormholzer Ring 32 5810 Witten 3 West Germany r engines fuel systems Jurgen Lenzen Ger manenstrasse 24 5600 Wuppertal 2 West Ger s Rumpel-design asymmetric air plane George Hubschmidt RD No 1 Box 318 Ewan Aura Road Glassboro NJ 0028 Continued page 116 Left The traditional symmetric FAI lob has evolved upright engine asymmetric designs typified Emil Rumpel asymmetric side-winders Chuck Schuette right has played greet years Basic FAI Speed rules given beginning text September 1979 47 NNOUNCINGThe New Instant-Dry f Adhesive Process K Ffl ToSheetFoam Wing Cores new product Corefilm replaces using white glue epoxy contact cement sheeting foam wing cores Corefilm rough thin lightweight mylar tape has ooated both sides contact adhesive Corefilm ready instant use After oovering wing core 11/2 strips corefilm remove paper backing set plywood balsa sheeting material place press foam core bond instant Corefilm flight tested gliders power ships tough mylar film provides strapping tape effect both top bottom has proven desirable superior quality Corefilm comes 1% wide 36 yard rolls roll will cover over 1900 sq 13 sq dealer direct Write brochure complete line BILL 19216 Calvert Street Reseda CA213/344-6391 Quiet Power -Tatone Makes new super quiet K&B 40 R/C muffler requires machined fit exhaust stack cover Easy no exhaust plugs fittings adaptors Muffler exposed holes Just bolt on.thats itl Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENYA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE 021 35 46 Add $100 extra above engines specify type Mounting strap screw included $1295 No 306 Add $125 postage handling CA residents add 6% tax Dealer inquiries 1931 Gee Bee Super Spo1Scale General Arrange-I - ment Drawing Catalog 25c W T Bill Given MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 little higilpoints design philosophy resulted Imitation say plane success would unfair understatement facts respects best flying plane have flown terms tight precise corners has few peers experimental features tested Imitation successful results now being incorporated new competition ship Excitation Because relative ease construc tion Imitation should reasonable project builder few profiles under belt Due ts outstanding flying capabilities perfect selection contest machine beginners GET ORGANIZED set 4 st.d ties 00kM Osr 4 years yes taole II eragazeres 4 MAO FILES $495 Seod 5496 pMe $1 00 postage wd taneag DaM iwnuemma PO Box 3M-K DOVER NH 00000 advanced fliers Any builder desires far better average plane practice impressive Sunday barnstorming ought take close look Continued Suggested Reading Fundamentals Aircraft FlightFred erick K Teichmann Hayden Book Co Inc Rochelle Park NJ Aerodynamics forNavalA viatorsIssued Office Chief Naval Opera tions Aviation Training Division Primar ily Chapter Pages 1 through 95 FLY SAFELY CL Speed/Hempel continued tram page 47 eral Speed supplies Rossi engine parts John Newton 2154 Los Padres Drive Rowland Heights CA 91748 lane parts Chuck Schuette-design asymmetric sidewinder Questions concerning article FAI Speed general may addressed Charles Lieber 725 Signal Light Rd Moorestown NJ 08057 Gene Hempel 301 North Yale Dr GarlantL TX 77459 CL Scale/Gretz continued page 48 authentically contoured spinners available parts castof gray epoxy resin ready-to-paint no priming extensive sanding required samples saw ap peared very accurately researched duplicated displayed excellent workmanship Also available firm hand-carved laminated wood scale props suitable WWl vintage kits market also come ready-to-finish include metal hub plates scratch-builders Keeler will make custom props either cast resin wood providing can furnish adequate scale documenta don should include diameter fullsize prop photos drawings possible materials will returned upon completion prop RingAroundthe. Cockpitl oldest tricks scale modeling book using fuel line tubing simulate padded edging normally found around rim open cockpits vintage full-scale aircraft com monly referred cockpit coaming building CL Sport Scale PT-i 9 became reacquainted familiar technique jotted down few notes may interest coaming around cockpits actual full-size PT-19 duplicating made padded black leather type typical older open cockpit aircraft may find some homebuilt types today will have foam rubber edging case need find brand tubing has right diameter wall thickness give correct degree size roundness found some W ID IA OD black neoprene rubber tubing formerly marketed VECO looked just right 10 feet away 1/6th scale modeL After finish complete used sharp #11 X-acto knife cut cockpit openings final shapeThen flat black anti-glare panel painted dry cut piece tubing cockpit slightly longer figure actually needed Use sharp blade again cut through tubing lengthwise along side can opened up slipped over cockpit edge trial fit tubing model first time glue Start end very carefully go way around making certain tubing isflrinly pushed up against balsa edge before cutting itto final length youre completely satisfied will fit desired take off mix up batch slow drying overnight epoxy glue Use piece wire work epoxy inside tubing Slip tubing back place model use plenty pins secure balsa cockpit until glue dries tubing using necessary push pins firmly withdraw just slightly holding tubing back fingers avoid leaving permanent dimple tubing after epoxy 116 Model Aviation