MIDWEST 112A UCONTROL Warbirds 47 HALLENGE YOUR BUDDY TOA DOGFIGHT Nylon engine mounts crank Everything glue paint PIIHAWEIT 400 South Indiana St. Hobart Indiana 46342 Congratulations October issue ModelAviationit truly fine issue Most modelers like pictures sketch es along liberal sprinkling color issue fills bill As may already know 9 pages out total 100 including front back covers did have pictures sketches compares favorably popular model magazines sold today RC Modeler checked two random issues RCM found five pages out 140 pages six pages out 156 pages sketches pictures Based cer tainly appears right track Again congratulations latest issue outstanding Guy F Farris AMA 4262 Nashville TN MA naturally pleased Guys ap probation no didnt know lets misconstrue reference RCM MA pleased compared RCM other popular maga zines Making Swirls method putting swirls alumi num Spirit St Louis think easier Mr Crawfords method Thinking Big Aug 1977 MA follows Break off about last three inches new pencil unused eraser tip Stick drill eraser pointing out put little rub bing compound end eraser drill turning touch eraser want swirl about sec ond three four swirls put little rubbing compound eraser tip much easier glueing rubber discs sandpaper end dowel rubbing compound puts realistic swirls aluminum scratching too deeply eraser tips about right diameter Mr Crawford specified inch end eraser will stay flat long hold pencil perpen dicular aluminum Bruce Denney AMA 63263 Fort Smith AR Tatone Mufflers reading October issue magazine very surprised read Mr Wynn Pauls column concerning mufflers Mr Paul did state mufflers too heavy and/or large opinion make six different series mufflers 23 different sizes Mr Paul has asked us sample new 4 Model Aviation Needed VdnrhnUIf MesserschmittKit No 252 Mustang Kits Feature Die-cut parts Preformed landing gear wheels Kit No Zbl Muf-L-It series mufflers weigh same less some mufflers stable pets Further have advanced patented series mufflers called Silencer Series series ultra-light feel capable least good noise suppression mufflers Mr Paul mentioned addition purpose engine muffler large small heavy light protect environment suppressing noise pioneered use mufflers made first commercially available muffler years ago very few people realized significance product felt protection environment would mean enough modelers warrant significant invest ment product rightwe have sold over 25000 mufflers sales continue increase John Tatone San Francisco CA Taft Scale Judging Defended reading write-up Taft FreeFlight Championships 1977 Clarence Haught struck negative com ments re scale would like answer criticisms primary concern seemed contestant quired judge own airplane qualified experienced judging team present Without getting whether dividual contestants over serious about winning would venture say experience type judging has works well con testants get close look planes entered often seeing things might otherwise have missed have advantage wider range opinions Judging category eg wing contestant can readily fairly evaluate own can actually have little effect eventual outcomes regard qualified experi enced judging team people fly scale generally what would call fairly qualified cant think anyone better qualified people seriously re Continued page 54 S Fox Fuel Line Models Life Blood Passes Through Simple Piece Fuel Line Surely Want Best As engine manufacturers acutely aware large portion called engine problems reality fuel line problems Symptoms fuel line trouble going lean air leaks speed fluctuations inability get rich enough high speed restricted flow Fox Fuel Lines best materials available physical proper ties selected model use Fox Fuel Lines worlds finest Tuft Line Silicone far strongest market semi transparent shows bubbles line heat resis tant Like silicone tubing tends slip off fittings unless care taken Neoprene Actually complex compound much elastic clings fittings main disadvan tage transparent Surgical Tubing Pure Rubber Very flexible Use sharp bends necessary Semi-transparent Shows bubbles line Holds fittings well Main disadvantage tends deteriorate rapidly silicone neoprene Plastic good anybodys dont think much plastic fuel line Advantage low price transparency Disadvantage tends collapse bends hardens age heat Tends leak air fittings after 5 ITEM FUEL LINEPRICEITEM FUEL LINEPRICE 86880 Small Neoprene2 P6g.5086885 Small Clear Plastic2hz Pkg.25 86881 Medium Neoprene2 Pkg.6086886 Medium Clear Plastic2hz Pkg.30 86882 Large Neoprene2 P6g.7086887 Large Clear Plastic2 P6g.40 86883 Small Tuft Line1 P6g. 5586888 Small Surgical Tabing2 Pkg.50 86884 Medium Tuft Line1 P6g 7086889 Med Surgical Tubing2 P6g.50 86851 LargeTuff Line1 Pkg10086890 Large Surgical Tubing2 P6g.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Answer Thro-Channel Dilemma NIMBUS 2-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit highly selective front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 2 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equip5ed 3 pin Deans gold plated plugs 6 Adjustable tension control sticks full line brochure write EK-PRODUCTS INC 3322 Stovall St Irving Texas 75061 USA Distributors dealers contact us new merchandising program 1977 EK-Producls Inc 779 EKlogictrol .- . 0 mber 1977 5 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior 1st CL Combat O & Sr 1st CL Slow Comb O & Sr 1st CL Carrier II Op Jr. Sr 1st CL Carrier Jr & Sr 1st CL Clam 0 Speed Open 1st CL Class C Speed Jr & Sr let CL Clats 6 Speed 0p & Sr 1st CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class 6 Proto Jr 1st FF Class 8 Open 1st FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID ULADES QF HARD MAPLE WOOD * SUPeRBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 roe RC-FREE FLIGHT CONTROL LINE SERIES 400 B FOR SPEED NG ADVANCED DESIGN NO 1 IN PYLON RACING LEADINO SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5%3%4129 755h6149 7SN 5%N 6N149 8%8%6%7 7%7%189 96% 7%7%189 CONTROL LINE SPEED & RACING DIAPITCHPRICE 4%6%129 4%55%129 6788%149 77%10%11 169 889189 89N 9%N189 8%77%189 91213219 NNARROW Letters Editor continued page 5 search build scale Maybe have spoiled having grown up flying against guys like Bill 1-lannan Walt Mooney Bill Stroman Russ Barrera on Finally comment flight duration over-emphasized criticism event run AMA rules set up point balance As WACO biplane placed higher 2nd low flight points indoor over couple long-flying Fikes Im sure would agree duration important think essence model meet fun meets tighten up point joy gone such strictness Nats think time fly different event people participate event interaction friends what makes contest worthwhile us Flightmasters contest means end PS enjoyed judging Mr Haughts plane Bill Warner Santa Monica CA Small AnglesAgain read reread Mr Joel Cheslers comments calculations relative article drawing small angles Editor article appeared July issue Mr Cheslers letter September detailed technical dissertation carried excessive length tends discredit procedure its entirety insinuating reader inaccurate therefore useless Mr Cheslers calculations con clusions therefrom strictly aca demic exercise trigonometry precise paper impossible achieve actual drafting practice points out er rors inaccuracies would suitable term procedures does pro pose alternative procedure easy understand layman simple use completely devoid inaccuracies however small text article does imply results using procedures would infinitesimally accurate angles up 900 purposely ended table 100 text purposely re vealed methods computations whereby table procedures evolved believe quite obvious read ers inaccuracies minute proportions entered computations sake simplicity chose round Out original radius 572959 inches 573 inches again 57-5/16 inches Addi tionally dimensions given table also rounded out nearest 1/16th inch Smaller increments inch would have no viable effect procedure As title article indicated method presented drawing small angles no logical reason use method angles 300 450 etc Drawing angles 150 larger incre ments 150 may easily accomplished various arrangements two drafting triangles 30600 450 Inac curacies exist drawing instruments equipment defeating Mr Cheslers quest infinite accuracy personally tested no less ten 180 30600 triangles made well-known firm quite expensive fore found acceptable amount error Using figures given Mr Cheslers table following table indicates both degrees inches actual amount inaccuracy occurring procedures does take account additional cumulative inaccuracies introduced proficiency draftsman accuracy instruments dimensional stabil ity drafting paper other con tributing factors will noted total amount inaccuracy occurring 200 angle procedure intended miniscule properly disregarded entirely Warren D Shipp San Diego CA Gossamer Condor/Berliner continued page 8 hangar working space important mornings little no wind March 1977 flown 1 miles straight line unofficial distance record neither NAA nor FAI has yet recognized other closed-circuit marks July Bryan Allen demonstrated flight take off 20 feet /4-mile flight 1800 turn Continued page 79 Mr Cheslers TableActual Error theActual Error Inches AngleAngleSineAngle Being Drawn End Base DegreesRadiansAngleError DegreesMinutesLine 57 5/16 Long 50870870%00 0 10175174A%031/20 152622591%093/20 203493422%0252/5 305245005%130PA Table indicating amount error method Note degree circle divided 60 minutes 54 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record oi June 19 Pylon mula 11125 Rev Up 8Yo-6% new Pylon Rac ing prop DIAPITCHPRICE 5%3489 63489 733% 4119 83%456129 94566% 77%139 10467149 106VV 8W149 106EVII159 114877/ 7%7%8159 1166W189 11%67189 126179 126W179 1356319 1456249 1556309 164%6389 W WIDE BLADE EW ETRAuIInF
Edition: Model Aviation - 1977/12
Page Numbers: 4, 5, 54
MIDWEST 112A UCONTROL Warbirds 47 HALLENGE YOUR BUDDY TOA DOGFIGHT Nylon engine mounts crank Everything glue paint PIIHAWEIT 400 South Indiana St. Hobart Indiana 46342 Congratulations October issue ModelAviationit truly fine issue Most modelers like pictures sketch es along liberal sprinkling color issue fills bill As may already know 9 pages out total 100 including front back covers did have pictures sketches compares favorably popular model magazines sold today RC Modeler checked two random issues RCM found five pages out 140 pages six pages out 156 pages sketches pictures Based cer tainly appears right track Again congratulations latest issue outstanding Guy F Farris AMA 4262 Nashville TN MA naturally pleased Guys ap probation no didnt know lets misconstrue reference RCM MA pleased compared RCM other popular maga zines Making Swirls method putting swirls alumi num Spirit St Louis think easier Mr Crawfords method Thinking Big Aug 1977 MA follows Break off about last three inches new pencil unused eraser tip Stick drill eraser pointing out put little rub bing compound end eraser drill turning touch eraser want swirl about sec ond three four swirls put little rubbing compound eraser tip much easier glueing rubber discs sandpaper end dowel rubbing compound puts realistic swirls aluminum scratching too deeply eraser tips about right diameter Mr Crawford specified inch end eraser will stay flat long hold pencil perpen dicular aluminum Bruce Denney AMA 63263 Fort Smith AR Tatone Mufflers reading October issue magazine very surprised read Mr Wynn Pauls column concerning mufflers Mr Paul did state mufflers too heavy and/or large opinion make six different series mufflers 23 different sizes Mr Paul has asked us sample new 4 Model Aviation Needed VdnrhnUIf MesserschmittKit No 252 Mustang Kits Feature Die-cut parts Preformed landing gear wheels Kit No Zbl Muf-L-It series mufflers weigh same less some mufflers stable pets Further have advanced patented series mufflers called Silencer Series series ultra-light feel capable least good noise suppression mufflers Mr Paul mentioned addition purpose engine muffler large small heavy light protect environment suppressing noise pioneered use mufflers made first commercially available muffler years ago very few people realized significance product felt protection environment would mean enough modelers warrant significant invest ment product rightwe have sold over 25000 mufflers sales continue increase John Tatone San Francisco CA Taft Scale Judging Defended reading write-up Taft FreeFlight Championships 1977 Clarence Haught struck negative com ments re scale would like answer criticisms primary concern seemed contestant quired judge own airplane qualified experienced judging team present Without getting whether dividual contestants over serious about winning would venture say experience type judging has works well con testants get close look planes entered often seeing things might otherwise have missed have advantage wider range opinions Judging category eg wing contestant can readily fairly evaluate own can actually have little effect eventual outcomes regard qualified experi enced judging team people fly scale generally what would call fairly qualified cant think anyone better qualified people seriously re Continued page 54 S Fox Fuel Line Models Life Blood Passes Through Simple Piece Fuel Line Surely Want Best As engine manufacturers acutely aware large portion called engine problems reality fuel line problems Symptoms fuel line trouble going lean air leaks speed fluctuations inability get rich enough high speed restricted flow Fox Fuel Lines best materials available physical proper ties selected model use Fox Fuel Lines worlds finest Tuft Line Silicone far strongest market semi transparent shows bubbles line heat resis tant Like silicone tubing tends slip off fittings unless care taken Neoprene Actually complex compound much elastic clings fittings main disadvan tage transparent Surgical Tubing Pure Rubber Very flexible Use sharp bends necessary Semi-transparent Shows bubbles line Holds fittings well Main disadvantage tends deteriorate rapidly silicone neoprene Plastic good anybodys dont think much plastic fuel line Advantage low price transparency Disadvantage tends collapse bends hardens age heat Tends leak air fittings after 5 ITEM FUEL LINEPRICEITEM FUEL LINEPRICE 86880 Small Neoprene2 P6g.5086885 Small Clear Plastic2hz Pkg.25 86881 Medium Neoprene2 Pkg.6086886 Medium Clear Plastic2hz Pkg.30 86882 Large Neoprene2 P6g.7086887 Large Clear Plastic2 P6g.40 86883 Small Tuft Line1 P6g. 5586888 Small Surgical Tabing2 Pkg.50 86884 Medium Tuft Line1 P6g 7086889 Med Surgical Tubing2 P6g.50 86851 LargeTuff Line1 Pkg10086890 Large Surgical Tubing2 P6g.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Answer Thro-Channel Dilemma NIMBUS 2-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit highly selective front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 2 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equip5ed 3 pin Deans gold plated plugs 6 Adjustable tension control sticks full line brochure write EK-PRODUCTS INC 3322 Stovall St Irving Texas 75061 USA Distributors dealers contact us new merchandising program 1977 EK-Producls Inc 779 EKlogictrol .- . 0 mber 1977 5 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior 1st CL Combat O & Sr 1st CL Slow Comb O & Sr 1st CL Carrier II Op Jr. Sr 1st CL Carrier Jr & Sr 1st CL Clam 0 Speed Open 1st CL Class C Speed Jr & Sr let CL Clats 6 Speed 0p & Sr 1st CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class 6 Proto Jr 1st FF Class 8 Open 1st FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID ULADES QF HARD MAPLE WOOD * SUPeRBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 roe RC-FREE FLIGHT CONTROL LINE SERIES 400 B FOR SPEED NG ADVANCED DESIGN NO 1 IN PYLON RACING LEADINO SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5%3%4129 755h6149 7SN 5%N 6N149 8%8%6%7 7%7%189 96% 7%7%189 CONTROL LINE SPEED & RACING DIAPITCHPRICE 4%6%129 4%55%129 6788%149 77%10%11 169 889189 89N 9%N189 8%77%189 91213219 NNARROW Letters Editor continued page 5 search build scale Maybe have spoiled having grown up flying against guys like Bill 1-lannan Walt Mooney Bill Stroman Russ Barrera on Finally comment flight duration over-emphasized criticism event run AMA rules set up point balance As WACO biplane placed higher 2nd low flight points indoor over couple long-flying Fikes Im sure would agree duration important think essence model meet fun meets tighten up point joy gone such strictness Nats think time fly different event people participate event interaction friends what makes contest worthwhile us Flightmasters contest means end PS enjoyed judging Mr Haughts plane Bill Warner Santa Monica CA Small AnglesAgain read reread Mr Joel Cheslers comments calculations relative article drawing small angles Editor article appeared July issue Mr Cheslers letter September detailed technical dissertation carried excessive length tends discredit procedure its entirety insinuating reader inaccurate therefore useless Mr Cheslers calculations con clusions therefrom strictly aca demic exercise trigonometry precise paper impossible achieve actual drafting practice points out er rors inaccuracies would suitable term procedures does pro pose alternative procedure easy understand layman simple use completely devoid inaccuracies however small text article does imply results using procedures would infinitesimally accurate angles up 900 purposely ended table 100 text purposely re vealed methods computations whereby table procedures evolved believe quite obvious read ers inaccuracies minute proportions entered computations sake simplicity chose round Out original radius 572959 inches 573 inches again 57-5/16 inches Addi tionally dimensions given table also rounded out nearest 1/16th inch Smaller increments inch would have no viable effect procedure As title article indicated method presented drawing small angles no logical reason use method angles 300 450 etc Drawing angles 150 larger incre ments 150 may easily accomplished various arrangements two drafting triangles 30600 450 Inac curacies exist drawing instruments equipment defeating Mr Cheslers quest infinite accuracy personally tested no less ten 180 30600 triangles made well-known firm quite expensive fore found acceptable amount error Using figures given Mr Cheslers table following table indicates both degrees inches actual amount inaccuracy occurring procedures does take account additional cumulative inaccuracies introduced proficiency draftsman accuracy instruments dimensional stabil ity drafting paper other con tributing factors will noted total amount inaccuracy occurring 200 angle procedure intended miniscule properly disregarded entirely Warren D Shipp San Diego CA Gossamer Condor/Berliner continued page 8 hangar working space important mornings little no wind March 1977 flown 1 miles straight line unofficial distance record neither NAA nor FAI has yet recognized other closed-circuit marks July Bryan Allen demonstrated flight take off 20 feet /4-mile flight 1800 turn Continued page 79 Mr Cheslers TableActual Error theActual Error Inches AngleAngleSineAngle Being Drawn End Base DegreesRadiansAngleError DegreesMinutesLine 57 5/16 Long 50870870%00 0 10175174A%031/20 152622591%093/20 203493422%0252/5 305245005%130PA Table indicating amount error method Note degree circle divided 60 minutes 54 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record oi June 19 Pylon mula 11125 Rev Up 8Yo-6% new Pylon Rac ing prop DIAPITCHPRICE 5%3489 63489 733% 4119 83%456129 94566% 77%139 10467149 106VV 8W149 106EVII159 114877/ 7%7%8159 1166W189 11%67189 126179 126W179 1356319 1456249 1556309 164%6389 W WIDE BLADE EW ETRAuIInF
Edition: Model Aviation - 1977/12
Page Numbers: 4, 5, 54
MIDWEST 112A UCONTROL Warbirds 47 HALLENGE YOUR BUDDY TOA DOGFIGHT Nylon engine mounts crank Everything glue paint PIIHAWEIT 400 South Indiana St. Hobart Indiana 46342 Congratulations October issue ModelAviationit truly fine issue Most modelers like pictures sketch es along liberal sprinkling color issue fills bill As may already know 9 pages out total 100 including front back covers did have pictures sketches compares favorably popular model magazines sold today RC Modeler checked two random issues RCM found five pages out 140 pages six pages out 156 pages sketches pictures Based cer tainly appears right track Again congratulations latest issue outstanding Guy F Farris AMA 4262 Nashville TN MA naturally pleased Guys ap probation no didnt know lets misconstrue reference RCM MA pleased compared RCM other popular maga zines Making Swirls method putting swirls alumi num Spirit St Louis think easier Mr Crawfords method Thinking Big Aug 1977 MA follows Break off about last three inches new pencil unused eraser tip Stick drill eraser pointing out put little rub bing compound end eraser drill turning touch eraser want swirl about sec ond three four swirls put little rubbing compound eraser tip much easier glueing rubber discs sandpaper end dowel rubbing compound puts realistic swirls aluminum scratching too deeply eraser tips about right diameter Mr Crawford specified inch end eraser will stay flat long hold pencil perpen dicular aluminum Bruce Denney AMA 63263 Fort Smith AR Tatone Mufflers reading October issue magazine very surprised read Mr Wynn Pauls column concerning mufflers Mr Paul did state mufflers too heavy and/or large opinion make six different series mufflers 23 different sizes Mr Paul has asked us sample new 4 Model Aviation Needed VdnrhnUIf MesserschmittKit No 252 Mustang Kits Feature Die-cut parts Preformed landing gear wheels Kit No Zbl Muf-L-It series mufflers weigh same less some mufflers stable pets Further have advanced patented series mufflers called Silencer Series series ultra-light feel capable least good noise suppression mufflers Mr Paul mentioned addition purpose engine muffler large small heavy light protect environment suppressing noise pioneered use mufflers made first commercially available muffler years ago very few people realized significance product felt protection environment would mean enough modelers warrant significant invest ment product rightwe have sold over 25000 mufflers sales continue increase John Tatone San Francisco CA Taft Scale Judging Defended reading write-up Taft FreeFlight Championships 1977 Clarence Haught struck negative com ments re scale would like answer criticisms primary concern seemed contestant quired judge own airplane qualified experienced judging team present Without getting whether dividual contestants over serious about winning would venture say experience type judging has works well con testants get close look planes entered often seeing things might otherwise have missed have advantage wider range opinions Judging category eg wing contestant can readily fairly evaluate own can actually have little effect eventual outcomes regard qualified experi enced judging team people fly scale generally what would call fairly qualified cant think anyone better qualified people seriously re Continued page 54 S Fox Fuel Line Models Life Blood Passes Through Simple Piece Fuel Line Surely Want Best As engine manufacturers acutely aware large portion called engine problems reality fuel line problems Symptoms fuel line trouble going lean air leaks speed fluctuations inability get rich enough high speed restricted flow Fox Fuel Lines best materials available physical proper ties selected model use Fox Fuel Lines worlds finest Tuft Line Silicone far strongest market semi transparent shows bubbles line heat resis tant Like silicone tubing tends slip off fittings unless care taken Neoprene Actually complex compound much elastic clings fittings main disadvan tage transparent Surgical Tubing Pure Rubber Very flexible Use sharp bends necessary Semi-transparent Shows bubbles line Holds fittings well Main disadvantage tends deteriorate rapidly silicone neoprene Plastic good anybodys dont think much plastic fuel line Advantage low price transparency Disadvantage tends collapse bends hardens age heat Tends leak air fittings after 5 ITEM FUEL LINEPRICEITEM FUEL LINEPRICE 86880 Small Neoprene2 P6g.5086885 Small Clear Plastic2hz Pkg.25 86881 Medium Neoprene2 Pkg.6086886 Medium Clear Plastic2hz Pkg.30 86882 Large Neoprene2 P6g.7086887 Large Clear Plastic2 P6g.40 86883 Small Tuft Line1 P6g. 5586888 Small Surgical Tabing2 Pkg.50 86884 Medium Tuft Line1 P6g 7086889 Med Surgical Tubing2 P6g.50 86851 LargeTuff Line1 Pkg10086890 Large Surgical Tubing2 P6g.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Answer Thro-Channel Dilemma NIMBUS 2-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit highly selective front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 2 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equip5ed 3 pin Deans gold plated plugs 6 Adjustable tension control sticks full line brochure write EK-PRODUCTS INC 3322 Stovall St Irving Texas 75061 USA Distributors dealers contact us new merchandising program 1977 EK-Producls Inc 779 EKlogictrol .- . 0 mber 1977 5 OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior 1st CL Combat O & Sr 1st CL Slow Comb O & Sr 1st CL Carrier II Op Jr. Sr 1st CL Carrier Jr & Sr 1st CL Clam 0 Speed Open 1st CL Class C Speed Jr & Sr let CL Clats 6 Speed 0p & Sr 1st CL Cl Speed Op Sr Jr 1st CL Formula 40 Open 1st CL Class 6 Proto Jr 1st FF Class 8 Open 1st FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID ULADES QF HARD MAPLE WOOD * SUPeRBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 roe RC-FREE FLIGHT CONTROL LINE SERIES 400 B FOR SPEED NG ADVANCED DESIGN NO 1 IN PYLON RACING LEADINO SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5%3%4129 755h6149 7SN 5%N 6N149 8%8%6%7 7%7%189 96% 7%7%189 CONTROL LINE SPEED & RACING DIAPITCHPRICE 4%6%129 4%55%129 6788%149 77%10%11 169 889189 89N 9%N189 8%77%189 91213219 NNARROW Letters Editor continued page 5 search build scale Maybe have spoiled having grown up flying against guys like Bill 1-lannan Walt Mooney Bill Stroman Russ Barrera on Finally comment flight duration over-emphasized criticism event run AMA rules set up point balance As WACO biplane placed higher 2nd low flight points indoor over couple long-flying Fikes Im sure would agree duration important think essence model meet fun meets tighten up point joy gone such strictness Nats think time fly different event people participate event interaction friends what makes contest worthwhile us Flightmasters contest means end PS enjoyed judging Mr Haughts plane Bill Warner Santa Monica CA Small AnglesAgain read reread Mr Joel Cheslers comments calculations relative article drawing small angles Editor article appeared July issue Mr Cheslers letter September detailed technical dissertation carried excessive length tends discredit procedure its entirety insinuating reader inaccurate therefore useless Mr Cheslers calculations con clusions therefrom strictly aca demic exercise trigonometry precise paper impossible achieve actual drafting practice points out er rors inaccuracies would suitable term procedures does pro pose alternative procedure easy understand layman simple use completely devoid inaccuracies however small text article does imply results using procedures would infinitesimally accurate angles up 900 purposely ended table 100 text purposely re vealed methods computations whereby table procedures evolved believe quite obvious read ers inaccuracies minute proportions entered computations sake simplicity chose round Out original radius 572959 inches 573 inches again 57-5/16 inches Addi tionally dimensions given table also rounded out nearest 1/16th inch Smaller increments inch would have no viable effect procedure As title article indicated method presented drawing small angles no logical reason use method angles 300 450 etc Drawing angles 150 larger incre ments 150 may easily accomplished various arrangements two drafting triangles 30600 450 Inac curacies exist drawing instruments equipment defeating Mr Cheslers quest infinite accuracy personally tested no less ten 180 30600 triangles made well-known firm quite expensive fore found acceptable amount error Using figures given Mr Cheslers table following table indicates both degrees inches actual amount inaccuracy occurring procedures does take account additional cumulative inaccuracies introduced proficiency draftsman accuracy instruments dimensional stabil ity drafting paper other con tributing factors will noted total amount inaccuracy occurring 200 angle procedure intended miniscule properly disregarded entirely Warren D Shipp San Diego CA Gossamer Condor/Berliner continued page 8 hangar working space important mornings little no wind March 1977 flown 1 miles straight line unofficial distance record neither NAA nor FAI has yet recognized other closed-circuit marks July Bryan Allen demonstrated flight take off 20 feet /4-mile flight 1800 turn Continued page 79 Mr Cheslers TableActual Error theActual Error Inches AngleAngleSineAngle Being Drawn End Base DegreesRadiansAngleError DegreesMinutesLine 57 5/16 Long 50870870%00 0 10175174A%031/20 152622591%093/20 203493422%0252/5 305245005%130PA Table indicating amount error method Note degree circle divided 60 minutes 54 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record oi June 19 Pylon mula 11125 Rev Up 8Yo-6% new Pylon Rac ing prop DIAPITCHPRICE 5%3489 63489 733% 4119 83%456129 94566% 77%139 10467149 106VV 8W149 106EVII159 114877/ 7%7%8159 1166W189 11%67189 126179 126W179 1356319 1456249 1556309 164%6389 W WIDE BLADE EW ETRAuIInF