MIDWEST CL Models Give choose from. theres Midwest model al kind CL flyer desires Engine Sizes Kit No 243 15 to 19 Wing Span 33 DUCTS CO 400 South IndIana St Hobart IndIana 46342 occasion letter editorial comment Meusers penny plane article June issue ModelAviation would agree Meusers model good example monoplane design have no objection running article model Its excellent model However am deeply distressed editorial comparison Meusers model Kukons biplane unnecessary comparison indicating biplane compared monoplane requires expert handling gives support very bad rules change proposal outlaw bi planes Kukon biplane extremely dif ficult build compared Meuser penny plane nor difficult handle know Ive seen model personal feeling should run article Kukons bipe soon possible let modelers decide relative merits two models selves reference copy letter April 29 FFCB enclosed Please note Two years ago authors original proposal letter circulated entire NI MAS membership indicated Novice penny plane pen ny plane event beginners same letter loopholes advanced design penny planes called glorious opportunity innovation experimen tation no objections After al two years serious AMA competi tion fliers have devoted good deal work advanced designs particularly biplanes rules change would capriciously outlaw biplanes after fliers invited develop such models mind unfortunate Tom Vallee Laurel MD MA regrets present scheduling inventory does permit publishing season article penny plane biplane Spirit St Louis really enjoyed reading Spirit St Louis article last issue Model viat ion facts told never known before However some other interesting things omitted No men tion made Charles Lindberghs age time flight 25 al lived see 50th Anniversary 4 Model Aviation Penny Plane Bipe MAGICIAN 35 Engine Sizes 29 35 Wing Span 48 Greatest U Control stunt flyer trainer Easy build easier fly Kit No 235 MAGICIAN 15 Engine Sizes 15 19 Wing Span 34 Little brother Magician 35 KING COBRA Engine Sizes 29 35 Wing Span 48 Kit No 236 15 to 19 Wing Span 33 WARHAWK Engine Sizes 29 35 Wing Span 48 Kit No 244 Engine Sizes Kit No 242 famous flight heard news sometime last year died Hawaii little simple addition reveals would have 75 years old year Another important thing would like tell about motion picture made 1957 Warner Bros starring James Stewart released simultaneously San Diego St Louis New York Paris May 20 1957 course name movie Spirit St Louis knowledge has never shown television year would perfect nationwide showing thing have never heard questioned Ryan NYP brought back Paris Anyone know answer Alvin E Johnson Oxford PA government supplied ship Lindberghs return US NYP brought back same way film mentioned has TV twice know well fine documentary anniversary ofthefiight About Spirit Robinsons drawing June MA Spirit St Louis superb no doubt accurate detailed ever pubFox 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 Tuff 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 ITEM FUEL LINEPRICE ITEM FUEL UNEPRICE 86880Small Neoprene2Pkg.5086885Small Clear Plastic2 Pkg.25 86881Medium Neoprene2Pkg.6086886Medium Clear Plastic2 Pkg.30 86882Large Neoprene2Pkg.7086887Large Clear Plastic2 Ptrg.40 86883Small luff Line1Pkg. 5586888Small Sergical Tubing2 Pkg.50 86884Medium Taft Line1Pkg7086889Med Surgical Tubing2 Pkg.50 86851Large Tuft Line1Pkg10086890Large Surgical Tubing2 Pkg.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Nimbus EKiogictrol new 4-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit double tuned front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 4 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equipped 3 pin Deans gold plated plugs 6 Adjustable tension control sticks 1977 EK-Products Inc 773 full line brochure write EK-logictrol 3322 Stovall St Irving TX 75061 USA Catalogs also available price $100 distributors jobbers dealers contact us new merchandising program EI logictrol September 1977 5 Ryan NYP replica Lindbergh Field San Diego CA April 20 1977 Actor Cliff Robertson left John Van Der Linde original builders Spirit St Louis Continued page 54 SPECIAL PRO SERIES 2 FOR EC-FREE FLIGHT CONTROl LINE DIAPITCHPRICE 5%3489 63489 733h4119 83%456129 94566% 77%139 10467149 106W 8W149 106EW159 114677% 7% 7%S159 116EW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLDN RACING LEADING SPEED RECORD HDLDER DP ALL TIMES NC PYLON RACING DIA PITCHPRICE 5/3%4119 75S%6129 7SN 5%N EN129 8%6%6%7 7%7%169 96%7 7%7%169 CONTROL LINE SPEED & RACING DIA PITCHPRICE 4/6%7119 4%55%119 6788%129 77%1G%11139 889149 89N9%N149 8%77%149 91213199 N NARROW Letters Editor continued frem page 5 lished Ive seai drawings Andrew Lech lives close made finely detailed model Natonal Air Space Museum companion piece actual Spirit Lechs drawN aceneate hat believe ever pub lished although available NASM 4 pages about $1922 Im enclosing couple prints Tallman-built replica Spirit St Louis display m San Diego Aero-Space Museum craft accurate duplication original atrplme five replicas u existeace 3 movie EAA ship take out Museum day shoot documentary TV shomi 19 20 May has seen daylight about eight years yet old Wright its older Lind berghs plane fired up first puB Its now back museum gave Hannan rare opportunity shoot some clear shots plane well having long talk Cliff Robertson real tique airplane buff biggest thrill day taxiing airplane around field Warren D Shipp San Diego CA Grey Gray Day Good grief Isnt enough have paid taxes forgotten what letters VTO stand have finally cleaned workbench Alas now find have shoulder Robert C Morrisons alarm May MA over infiltration rd grey memories Major Greys Chutney India Enough solemnly promise refrain using grey except course dur ing dredging Thames coro nation ceremonies Morrison will following notice Random House Dictionary does make same dis tinction does regarding grey~ gray notice further redcoat word common noun finally aware neither England nor United States would say color airplanes tires charcoal gray rather color airplanes tires charcoal gray Im afraid Morrison may have spent too much time rying about whether would make new cowl out alumi num aluminium Lee Hunt Northridge CA Safe Flying No Accident Meet Abeat Sm Aaghs Referring article entitled Simple Method Drawing Small Angles appeared July 1977 issue Model Aviation feel important have complete understanding con cept discussed order anyone con templating use method fully appetriate its lmitatuxs What sathor has presented n geometrical construc tion obviously right triangle seen &sre below ANGLE Apparently what Mr Shipp attempt ing convey fact such triangle SlneAngle R/BaseLineI Now reasonably small angles approximation Sine Angle e 2 can used Angle radians Since radian approximately equal 57-5/16 degrees obtain equation approximation of2 Angle 57-5/16 3 Base Line Angle degrees Now transposing arrive basic equation needed construction pre sented ie R e Base Line 4 57-5/16 obvious equation 4 base line 57-5/16 equation reduces R e What must remembered fact exact solution implied article approximation equation 2 although sufficiently accu rate small angles order appreci ate amount approximation involved have presented following table dicate Sine angle varies value angle angle increases addition have calculated error approximation would amount produce Angle degrees S 10 15 20 30 90 Angle radians 087 175 262 349 524 1571 Sine angle 087 174 259 342 500 1000 Error 0% 1/2% 1% 2% 5% 57% Joel Chesler Malverne Estates NY Note Mr Chesler stated although efficiently accurate small angles Continued page 89 54 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mule l125 RevUp 8%-6% new Pylon Rac ing prop OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS let PC Masters CI. let NC Advanced let NC Novice let RC Sport Scale let Formula Pylon let Quener Midget Pylon let CL Stunt Open let CL Stunt Senior 1st CL Stunt Juntor let CL Combat Op & Sr let CL Slow Comb Op & Sr let CL Carrier II Op. Jr Sr let CL Carrier Jr & Sr 1st CL Class 0 Speed Open let CL Class C Speed ir & Sr let CL Class B Speed Op & Sr let CL CI Speed Op Sr Jr let CL Formula 40 Open let CL Class B Prow Jr let FF Class B Open let FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID glADES HARD MAPSI WOOD * SUPERDLY FINISHED COMPtETELY FUEl PROOP
Edition: Model Aviation - 1977/09
Page Numbers: 4, 5, 54
MIDWEST CL Models Give choose from. theres Midwest model al kind CL flyer desires Engine Sizes Kit No 243 15 to 19 Wing Span 33 DUCTS CO 400 South IndIana St Hobart IndIana 46342 occasion letter editorial comment Meusers penny plane article June issue ModelAviation would agree Meusers model good example monoplane design have no objection running article model Its excellent model However am deeply distressed editorial comparison Meusers model Kukons biplane unnecessary comparison indicating biplane compared monoplane requires expert handling gives support very bad rules change proposal outlaw bi planes Kukon biplane extremely dif ficult build compared Meuser penny plane nor difficult handle know Ive seen model personal feeling should run article Kukons bipe soon possible let modelers decide relative merits two models selves reference copy letter April 29 FFCB enclosed Please note Two years ago authors original proposal letter circulated entire NI MAS membership indicated Novice penny plane pen ny plane event beginners same letter loopholes advanced design penny planes called glorious opportunity innovation experimen tation no objections After al two years serious AMA competi tion fliers have devoted good deal work advanced designs particularly biplanes rules change would capriciously outlaw biplanes after fliers invited develop such models mind unfortunate Tom Vallee Laurel MD MA regrets present scheduling inventory does permit publishing season article penny plane biplane Spirit St Louis really enjoyed reading Spirit St Louis article last issue Model viat ion facts told never known before However some other interesting things omitted No men tion made Charles Lindberghs age time flight 25 al lived see 50th Anniversary 4 Model Aviation Penny Plane Bipe MAGICIAN 35 Engine Sizes 29 35 Wing Span 48 Greatest U Control stunt flyer trainer Easy build easier fly Kit No 235 MAGICIAN 15 Engine Sizes 15 19 Wing Span 34 Little brother Magician 35 KING COBRA Engine Sizes 29 35 Wing Span 48 Kit No 236 15 to 19 Wing Span 33 WARHAWK Engine Sizes 29 35 Wing Span 48 Kit No 244 Engine Sizes Kit No 242 famous flight heard news sometime last year died Hawaii little simple addition reveals would have 75 years old year Another important thing would like tell about motion picture made 1957 Warner Bros starring James Stewart released simultaneously San Diego St Louis New York Paris May 20 1957 course name movie Spirit St Louis knowledge has never shown television year would perfect nationwide showing thing have never heard questioned Ryan NYP brought back Paris Anyone know answer Alvin E Johnson Oxford PA government supplied ship Lindberghs return US NYP brought back same way film mentioned has TV twice know well fine documentary anniversary ofthefiight About Spirit Robinsons drawing June MA Spirit St Louis superb no doubt accurate detailed ever pubFox 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 Tuff 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 ITEM FUEL LINEPRICE ITEM FUEL UNEPRICE 86880Small Neoprene2Pkg.5086885Small Clear Plastic2 Pkg.25 86881Medium Neoprene2Pkg.6086886Medium Clear Plastic2 Pkg.30 86882Large Neoprene2Pkg.7086887Large Clear Plastic2 Ptrg.40 86883Small luff Line1Pkg. 5586888Small Sergical Tubing2 Pkg.50 86884Medium Taft Line1Pkg7086889Med Surgical Tubing2 Pkg.50 86851Large Tuft Line1Pkg10086890Large Surgical Tubing2 Pkg.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Nimbus EKiogictrol new 4-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit double tuned front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 4 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equipped 3 pin Deans gold plated plugs 6 Adjustable tension control sticks 1977 EK-Products Inc 773 full line brochure write EK-logictrol 3322 Stovall St Irving TX 75061 USA Catalogs also available price $100 distributors jobbers dealers contact us new merchandising program EI logictrol September 1977 5 Ryan NYP replica Lindbergh Field San Diego CA April 20 1977 Actor Cliff Robertson left John Van Der Linde original builders Spirit St Louis Continued page 54 SPECIAL PRO SERIES 2 FOR EC-FREE FLIGHT CONTROl LINE DIAPITCHPRICE 5%3489 63489 733h4119 83%456129 94566% 77%139 10467149 106W 8W149 106EW159 114677% 7% 7%S159 116EW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLDN RACING LEADING SPEED RECORD HDLDER DP ALL TIMES NC PYLON RACING DIA PITCHPRICE 5/3%4119 75S%6129 7SN 5%N EN129 8%6%6%7 7%7%169 96%7 7%7%169 CONTROL LINE SPEED & RACING DIA PITCHPRICE 4/6%7119 4%55%119 6788%129 77%1G%11139 889149 89N9%N149 8%77%149 91213199 N NARROW Letters Editor continued frem page 5 lished Ive seai drawings Andrew Lech lives close made finely detailed model Natonal Air Space Museum companion piece actual Spirit Lechs drawN aceneate hat believe ever pub lished although available NASM 4 pages about $1922 Im enclosing couple prints Tallman-built replica Spirit St Louis display m San Diego Aero-Space Museum craft accurate duplication original atrplme five replicas u existeace 3 movie EAA ship take out Museum day shoot documentary TV shomi 19 20 May has seen daylight about eight years yet old Wright its older Lind berghs plane fired up first puB Its now back museum gave Hannan rare opportunity shoot some clear shots plane well having long talk Cliff Robertson real tique airplane buff biggest thrill day taxiing airplane around field Warren D Shipp San Diego CA Grey Gray Day Good grief Isnt enough have paid taxes forgotten what letters VTO stand have finally cleaned workbench Alas now find have shoulder Robert C Morrisons alarm May MA over infiltration rd grey memories Major Greys Chutney India Enough solemnly promise refrain using grey except course dur ing dredging Thames coro nation ceremonies Morrison will following notice Random House Dictionary does make same dis tinction does regarding grey~ gray notice further redcoat word common noun finally aware neither England nor United States would say color airplanes tires charcoal gray rather color airplanes tires charcoal gray Im afraid Morrison may have spent too much time rying about whether would make new cowl out alumi num aluminium Lee Hunt Northridge CA Safe Flying No Accident Meet Abeat Sm Aaghs Referring article entitled Simple Method Drawing Small Angles appeared July 1977 issue Model Aviation feel important have complete understanding con cept discussed order anyone con templating use method fully appetriate its lmitatuxs What sathor has presented n geometrical construc tion obviously right triangle seen &sre below ANGLE Apparently what Mr Shipp attempt ing convey fact such triangle SlneAngle R/BaseLineI Now reasonably small angles approximation Sine Angle e 2 can used Angle radians Since radian approximately equal 57-5/16 degrees obtain equation approximation of2 Angle 57-5/16 3 Base Line Angle degrees Now transposing arrive basic equation needed construction pre sented ie R e Base Line 4 57-5/16 obvious equation 4 base line 57-5/16 equation reduces R e What must remembered fact exact solution implied article approximation equation 2 although sufficiently accu rate small angles order appreci ate amount approximation involved have presented following table dicate Sine angle varies value angle angle increases addition have calculated error approximation would amount produce Angle degrees S 10 15 20 30 90 Angle radians 087 175 262 349 524 1571 Sine angle 087 174 259 342 500 1000 Error 0% 1/2% 1% 2% 5% 57% Joel Chesler Malverne Estates NY Note Mr Chesler stated although efficiently accurate small angles Continued page 89 54 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mule l125 RevUp 8%-6% new Pylon Rac ing prop OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS let PC Masters CI. let NC Advanced let NC Novice let RC Sport Scale let Formula Pylon let Quener Midget Pylon let CL Stunt Open let CL Stunt Senior 1st CL Stunt Juntor let CL Combat Op & Sr let CL Slow Comb Op & Sr let CL Carrier II Op. Jr Sr let CL Carrier Jr & Sr 1st CL Class 0 Speed Open let CL Class C Speed ir & Sr let CL Class B Speed Op & Sr let CL CI Speed Op Sr Jr let CL Formula 40 Open let CL Class B Prow Jr let FF Class B Open let FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID glADES HARD MAPSI WOOD * SUPERDLY FINISHED COMPtETELY FUEl PROOP
Edition: Model Aviation - 1977/09
Page Numbers: 4, 5, 54
MIDWEST CL Models Give choose from. theres Midwest model al kind CL flyer desires Engine Sizes Kit No 243 15 to 19 Wing Span 33 DUCTS CO 400 South IndIana St Hobart IndIana 46342 occasion letter editorial comment Meusers penny plane article June issue ModelAviation would agree Meusers model good example monoplane design have no objection running article model Its excellent model However am deeply distressed editorial comparison Meusers model Kukons biplane unnecessary comparison indicating biplane compared monoplane requires expert handling gives support very bad rules change proposal outlaw bi planes Kukon biplane extremely dif ficult build compared Meuser penny plane nor difficult handle know Ive seen model personal feeling should run article Kukons bipe soon possible let modelers decide relative merits two models selves reference copy letter April 29 FFCB enclosed Please note Two years ago authors original proposal letter circulated entire NI MAS membership indicated Novice penny plane pen ny plane event beginners same letter loopholes advanced design penny planes called glorious opportunity innovation experimen tation no objections After al two years serious AMA competi tion fliers have devoted good deal work advanced designs particularly biplanes rules change would capriciously outlaw biplanes after fliers invited develop such models mind unfortunate Tom Vallee Laurel MD MA regrets present scheduling inventory does permit publishing season article penny plane biplane Spirit St Louis really enjoyed reading Spirit St Louis article last issue Model viat ion facts told never known before However some other interesting things omitted No men tion made Charles Lindberghs age time flight 25 al lived see 50th Anniversary 4 Model Aviation Penny Plane Bipe MAGICIAN 35 Engine Sizes 29 35 Wing Span 48 Greatest U Control stunt flyer trainer Easy build easier fly Kit No 235 MAGICIAN 15 Engine Sizes 15 19 Wing Span 34 Little brother Magician 35 KING COBRA Engine Sizes 29 35 Wing Span 48 Kit No 236 15 to 19 Wing Span 33 WARHAWK Engine Sizes 29 35 Wing Span 48 Kit No 244 Engine Sizes Kit No 242 famous flight heard news sometime last year died Hawaii little simple addition reveals would have 75 years old year Another important thing would like tell about motion picture made 1957 Warner Bros starring James Stewart released simultaneously San Diego St Louis New York Paris May 20 1957 course name movie Spirit St Louis knowledge has never shown television year would perfect nationwide showing thing have never heard questioned Ryan NYP brought back Paris Anyone know answer Alvin E Johnson Oxford PA government supplied ship Lindberghs return US NYP brought back same way film mentioned has TV twice know well fine documentary anniversary ofthefiight About Spirit Robinsons drawing June MA Spirit St Louis superb no doubt accurate detailed ever pubFox 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 Tuff 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 ITEM FUEL LINEPRICE ITEM FUEL UNEPRICE 86880Small Neoprene2Pkg.5086885Small Clear Plastic2 Pkg.25 86881Medium Neoprene2Pkg.6086886Medium Clear Plastic2 Pkg.30 86882Large Neoprene2Pkg.7086887Large Clear Plastic2 Ptrg.40 86883Small luff Line1Pkg. 5586888Small Sergical Tubing2 Pkg.50 86884Medium Taft Line1Pkg7086889Med Surgical Tubing2 Pkg.50 86851Large Tuft Line1Pkg10086890Large Surgical Tubing2 Pkg.60 FOX MANUFACTURING Fox Model Airplane Products 5305 Towson Smith Arkansas 72901 e 501-646-1656 Nimbus EKiogictrol new 4-channel radio system offers American engineering import prices Features include. 1 Solid state superheterodyne 2 All silicon transistor receiver circuit double tuned front end 3 RF amplifier maximum signal noise ratio unexcelled selectivity 4 4 ultra small EK SM servos greater 4 pounds output thrust 5 Receiver servos equipped 3 pin Deans gold plated plugs 6 Adjustable tension control sticks 1977 EK-Products Inc 773 full line brochure write EK-logictrol 3322 Stovall St Irving TX 75061 USA Catalogs also available price $100 distributors jobbers dealers contact us new merchandising program EI logictrol September 1977 5 Ryan NYP replica Lindbergh Field San Diego CA April 20 1977 Actor Cliff Robertson left John Van Der Linde original builders Spirit St Louis Continued page 54 SPECIAL PRO SERIES 2 FOR EC-FREE FLIGHT CONTROl LINE DIAPITCHPRICE 5%3489 63489 733h4119 83%456129 94566% 77%139 10467149 106W 8W149 106EW159 114677% 7% 7%S159 116EW169 11%67169 126179 125W179 1356219 145 6249 1556309 164% 6389 W WIDE BLADE EW EXTRA WIDE SERIES 400 B FOR SPEED NG ADVANCED DESIGN ND 1 IN PYLDN RACING LEADING SPEED RECORD HDLDER DP ALL TIMES NC PYLON RACING DIA PITCHPRICE 5/3%4119 75S%6129 7SN 5%N EN129 8%6%6%7 7%7%169 96%7 7%7%169 CONTROL LINE SPEED & RACING DIA PITCHPRICE 4/6%7119 4%55%119 6788%129 77%1G%11139 889149 89N9%N149 8%77%149 91213199 N NARROW Letters Editor continued frem page 5 lished Ive seai drawings Andrew Lech lives close made finely detailed model Natonal Air Space Museum companion piece actual Spirit Lechs drawN aceneate hat believe ever pub lished although available NASM 4 pages about $1922 Im enclosing couple prints Tallman-built replica Spirit St Louis display m San Diego Aero-Space Museum craft accurate duplication original atrplme five replicas u existeace 3 movie EAA ship take out Museum day shoot documentary TV shomi 19 20 May has seen daylight about eight years yet old Wright its older Lind berghs plane fired up first puB Its now back museum gave Hannan rare opportunity shoot some clear shots plane well having long talk Cliff Robertson real tique airplane buff biggest thrill day taxiing airplane around field Warren D Shipp San Diego CA Grey Gray Day Good grief Isnt enough have paid taxes forgotten what letters VTO stand have finally cleaned workbench Alas now find have shoulder Robert C Morrisons alarm May MA over infiltration rd grey memories Major Greys Chutney India Enough solemnly promise refrain using grey except course dur ing dredging Thames coro nation ceremonies Morrison will following notice Random House Dictionary does make same dis tinction does regarding grey~ gray notice further redcoat word common noun finally aware neither England nor United States would say color airplanes tires charcoal gray rather color airplanes tires charcoal gray Im afraid Morrison may have spent too much time rying about whether would make new cowl out alumi num aluminium Lee Hunt Northridge CA Safe Flying No Accident Meet Abeat Sm Aaghs Referring article entitled Simple Method Drawing Small Angles appeared July 1977 issue Model Aviation feel important have complete understanding con cept discussed order anyone con templating use method fully appetriate its lmitatuxs What sathor has presented n geometrical construc tion obviously right triangle seen &sre below ANGLE Apparently what Mr Shipp attempt ing convey fact such triangle SlneAngle R/BaseLineI Now reasonably small angles approximation Sine Angle e 2 can used Angle radians Since radian approximately equal 57-5/16 degrees obtain equation approximation of2 Angle 57-5/16 3 Base Line Angle degrees Now transposing arrive basic equation needed construction pre sented ie R e Base Line 4 57-5/16 obvious equation 4 base line 57-5/16 equation reduces R e What must remembered fact exact solution implied article approximation equation 2 although sufficiently accu rate small angles order appreci ate amount approximation involved have presented following table dicate Sine angle varies value angle angle increases addition have calculated error approximation would amount produce Angle degrees S 10 15 20 30 90 Angle radians 087 175 262 349 524 1571 Sine angle 087 174 259 342 500 1000 Error 0% 1/2% 1% 2% 5% 57% Joel Chesler Malverne Estates NY Note Mr Chesler stated although efficiently accurate small angles Continued page 89 54 Model Aviation NEWS FLASH Bob Smith Chatsworth CA set new World Speed Record June 19 Pylon mule l125 RevUp 8%-6% new Pylon Rac ing prop OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS let PC Masters CI. let NC Advanced let NC Novice let RC Sport Scale let Formula Pylon let Quener Midget Pylon let CL Stunt Open let CL Stunt Senior 1st CL Stunt Juntor let CL Combat Op & Sr let CL Slow Comb Op & Sr let CL Carrier II Op. Jr Sr let CL Carrier Jr & Sr 1st CL Class 0 Speed Open let CL Class C Speed ir & Sr let CL Class B Speed Op & Sr let CL CI Speed Op Sr Jr let CL Formula 40 Open let CL Class B Prow Jr let FF Class B Open let FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID glADES HARD MAPSI WOOD * SUPERDLY FINISHED COMPtETELY FUEl PROOP