II ~4fem 4d&54 / $9900 DELIVERED VISA Four Folding Legs Wing & Fuselage Holders Add $400 Shipping calif 6% Tax RAC Products408 274-1915 3200 Knightswood Way 0 San Jose CA 95148 Xetters t 6d letters will carefully considered general interest used Send Model Aviation 815 15th St NW Washington DC 20005 Space Shuttle Antenna Coupling Problem article Space Shuttle did present detail problem antenna coupling since reminded problem until experienced week before press date some guidelines must deal problem Antenna coupling term refers two receivers interacting other causing control problems antennas too close other Just such prob lem occurs Shuttle mounted back carrying plane Shuttle antenna runs parallel powered models antenna Some have operated several receivers together no problem exceptions Most equipment can modified handle problem simplest solution use separate frequency bands will stop reaction almost time Most people think three bands avail able purpose solving problem fourwhich big help anyone doesnt have Ham license tend group 75 MHz frequency 72 MHz band flying adjacent models can operate receiver 72 MHz 75 MHz no reactions instance have no problem flying RC para chutist 72080 J-3 Cub 75 Flying Shuttle 27 MHz equally suitable intend fly combination close frequency question try following test guideline First tach models together rangecheck model separately trans mitter antennas down test models both radios should no unus ual noise neutral nor glitches nor limited throw servos Check three points carefully radios pass obvi ous test turn off Shuttle transmitter shuttle carrying model both respond remaining transmitter link Thats right trans mitter operating another adjacent receiver transmitters frequency fly consider radio inferior tan dem-mounted receivers rare manu facturers consider priority design correct receivers seem isolated properly occasional glitching try place antennas right angle other greatest distance other Also try wood tow rack instead wire greatly condensed treatment subject hope will keep Shuttle fliers out trouble am now flying much larger Space Shut tle well baby article September issue hope MA read ers enjoying Shuttle much am Its favorite models fly Im put ting engine now building up nerve fly rockets Luther Hux Annandale VA Luther wanted us get change Space Shuttle article relating above information September issue already process being printed time could revise picture caption alert readers potential problem Miniature Aircraft vs Toys time time read hobby being referred playing toy airplanes read further within modeling publications need improve image modeling miniature airplanes dont quite get observations being newcomer after 50 years stuff use AMA rules set up very nicely protect image playing toy airplanes Take look flying field 90% Continued page 8 6 Model Aviation rLiqhr NOTICE Due error concerning address labels last months issue September small number AMA member subscribers sent duplicate copies Anyone re ceived duplicate copy please give modeling friend doesnt receive maga zine isnt necessary return extra copynor necessary notify us duplication problem already has rectified Carl R Wheeley Editor & Publisher GUESS WORK OUT OF STARTING get quick start time new Buzz-BoxTM Simply connect glow plug flip prop change pitch buzzing sound emitted unique plug driver pat pend tells exactly what happening inside com bustion chamber know immediately what problem SHORTED OR OPEN PLUG DAMAGED OR DEFECTIVE PLUG FLOODED ENGINE FOULED OR LOADED PLUG LACK OF FUEL WRONG FUEL/AIR MIXTURE . -Box also maintains constant plug temperature clearing floods instantly adjustable drive both normal R/G plugs unit features rechargeable ni-cad battery compact self-contained draws power demand retail price remarkable diagnostic tool $4995 $2995 kit Add $200 postage handling within continental US Connecticut residents add sales tax DEALER INQUIRIES INVITED 2 planes have wing stab resemble real airplanelittle else does upgrade image modeling miniature airplanes just take SE-5 AT-6 P-51 enter Masters Pattem n toy airplanes will eat alive events like Scale just use scaled power breezeand get bumped around just like real scale bumpsand watch upgraded powerful toy-like Scale miniature air plane give fits Like have created image toy airplanes rules just what deserve Fun isnt Eldon Wilson San Angelo TX Propellers Work appear two principal schools thought propellers work geometric pitch providing handy dividing line between holds thrust equal rate change momentum air upon propeller acts effective pitch must fall short ideal geometric pitch extent various losses resulting exchange other holds lifting surface happens rotate propeller can does exceed geometric pitch first case impetus seen reaction air thrust rearward vane second least partially drawing forward due lift forces kind commonly associate wing would like communicate anyone has ideas evidence support either views qualifications manner have attempted describe Richard Miller 368 Rock Springs Rd Escondido CA 92026 Some interesting points will come out no doubt Please communicate directly Mr Miller Bakers B-25 Im enclosing photo 20-sized B-25 built Frank B Bakers design featured March 1979 MA hadnt interested twin-engine aircraft until just recently though have flying RC long time got bug really got bad thumbed through back issues MA until came Bakers B-25 ordered plans 8 Model Aviation TAKE THE K PO Box 3352 Stamford CT 06905 set out eniarge sue plans bithoping could get away Im proud say successful B-25 has span 53Ys area 3436 sq fuselage 37 long about 2 longer plans wing removable put Continued page 122 Letters Editor Continued page 8 steerable nose wheel coupled ailerons use two OS ower Ace threechannel guidance weighs 4V2 lb color scheme olive drab planes name numbers taken Squadron Signals Publication B-25 sheer coinci dence name plane happened wifes name Patricia Ann Talk about running up some pointsat least hundred Id say whole project took about three weeks construct another four five weeks waiting wind quit blowing Finally test flown successfully May 25 1981 Im proud say its great flying machine very realistic way thats Patricia Ann picture namesake Enjoy magazine very much Keep up good work Jill Kittel Airchild A R Kawczynski Duncan OK During preparation article Airchild published November 1979 issue MA number photos taken model company charming young lady Jill Kittel art student time Several photos sent Hank Clark use preparation superb cut away drawing model thought both models outstanding wrote say what wonderful cover would make Alas fate intervened form Nats Jill wound up proverbial cutting room floor Jill disappointed Hank desolate delighted Herb Silbermanos layout forgave oversight Although couple years have passed Hank wont forget has recently wondered what became up-till-now invisible woman Well Jill alive well working artist advertising agency Madison Perhaps could resolve printing out-takes make Jill happy happy Hank will happy have keep writingwhich takes him away drawing board Owen Kampen Madison WI Weve asked Herb Silbermann see fhe can work some layout magic place letter associated picture Jill Kittel Airchild can printed color some what originally intended case renews interest Airchild wed best tell little about Its RC sport model based famous Fairchild 24 forfour channels 23 power Full-s ize plans availablefor$4 50 plan No 281 Scale Control Cable Systems June 1981 Letters column comment Scale Cable Systems involving Geo McGinnis Norman Rosenstock Editor Rosenstock author Church Midwing article January 1981 issue used cable control system hate picky drawing ac companied letters correct showing control cable systems full-scale aircraft period such real airplanes rocker arm listed bellcrank MA drawing vertical position rather horizontal shown Also two cables tops elevator horns equal length cables bottoms elevator control horns form V having equal length legs Additionally real airplanes two cable systems crossed other enroute theelevator control stick joy stick such bottom cables went upper part stick upper cables went lower part stick rocker arm/bar system developed cables went bar secondary single cable rigid pushrod went stick case secondary cables crossed enroute elevator cables came fuselage less horizontally pushrod secondary system rod coming bottom stick top rocker arm Ordinarily wouldnt bother mention helped rebuilt lot antique real airplanes including Heath also Frank Tallmans old Farman Shorthorn real rigging nightmare years ago model judge large Los Angeles Scale meet would knock off points found cable system shown MA drawing going trouble build scale cable system should correct Gordon Codding Kingman AZ Weforwarded above letter Norm Rosenstock wrote Mr Codding cable system shown June Letters column intended appear scale externally Church Midwing Rosenstock control system designed Sport Scale Giant Scale just sport flying such models judged visually distancerather close-up examination measurement case Precision Scale way Codding has wealth Scale modeling data including originalfactory draw ings WW early home-built aircraft Send SA SE listing Gordon Codding 3 724 John L Ave Kingman AZ 86401 RC Trainers agree 66-year-old Graham Selick con cerning so-called trainers market today Letters February 1981 MA verge buying popular bomb trainers 40 engine changed mind after seeing two beautifully-built trainers maiden flights screw themselves ground think end two potential RC pilot careers took home $250 work scrap bushel basket read ad Craft-Air about Piece 0 Cake like part said flies slow-w-w 16 mph economical 6-ft wingspan part about 6 05/sq ft wing loading built have about 30 flights far honestly feel way start RC us old geezers dumb thumbs slow reflexes get trouble nothing found plane knows fly better pilot flies like dream like nightmare course alignment center gravity CG very important learned hard way Republic Aviation worked 31 years Did know real ones occasion ally have warped wings test pilots flight crab sheet would report roll-off problems would happen once great left wing plus side contour tolerance right wing minus side vice versa problem corrected designing eccentric wing hinge bushings wing attach bolts could rotated slightly increase decrease wing incidence obtain match Joe Nelson Stroudsburg PA 1 22 Model Aviation EDITORS NOTE Bill Warners FF Scale column last month mentioned Earl Stahl plans can asking Smithsonian library isnt quite true Librarian informs us holdings magazines listed occasionally complete have issue plan want theyll gladly send copy Send $1 cover handling duplication SASE.DR P
Edition: Model Aviation - 1981/10
Page Numbers: 6, 8, 122
II ~4fem 4d&54 / $9900 DELIVERED VISA Four Folding Legs Wing & Fuselage Holders Add $400 Shipping calif 6% Tax RAC Products408 274-1915 3200 Knightswood Way 0 San Jose CA 95148 Xetters t 6d letters will carefully considered general interest used Send Model Aviation 815 15th St NW Washington DC 20005 Space Shuttle Antenna Coupling Problem article Space Shuttle did present detail problem antenna coupling since reminded problem until experienced week before press date some guidelines must deal problem Antenna coupling term refers two receivers interacting other causing control problems antennas too close other Just such prob lem occurs Shuttle mounted back carrying plane Shuttle antenna runs parallel powered models antenna Some have operated several receivers together no problem exceptions Most equipment can modified handle problem simplest solution use separate frequency bands will stop reaction almost time Most people think three bands avail able purpose solving problem fourwhich big help anyone doesnt have Ham license tend group 75 MHz frequency 72 MHz band flying adjacent models can operate receiver 72 MHz 75 MHz no reactions instance have no problem flying RC para chutist 72080 J-3 Cub 75 Flying Shuttle 27 MHz equally suitable intend fly combination close frequency question try following test guideline First tach models together rangecheck model separately trans mitter antennas down test models both radios should no unus ual noise neutral nor glitches nor limited throw servos Check three points carefully radios pass obvi ous test turn off Shuttle transmitter shuttle carrying model both respond remaining transmitter link Thats right trans mitter operating another adjacent receiver transmitters frequency fly consider radio inferior tan dem-mounted receivers rare manu facturers consider priority design correct receivers seem isolated properly occasional glitching try place antennas right angle other greatest distance other Also try wood tow rack instead wire greatly condensed treatment subject hope will keep Shuttle fliers out trouble am now flying much larger Space Shut tle well baby article September issue hope MA read ers enjoying Shuttle much am Its favorite models fly Im put ting engine now building up nerve fly rockets Luther Hux Annandale VA Luther wanted us get change Space Shuttle article relating above information September issue already process being printed time could revise picture caption alert readers potential problem Miniature Aircraft vs Toys time time read hobby being referred playing toy airplanes read further within modeling publications need improve image modeling miniature airplanes dont quite get observations being newcomer after 50 years stuff use AMA rules set up very nicely protect image playing toy airplanes Take look flying field 90% Continued page 8 6 Model Aviation rLiqhr NOTICE Due error concerning address labels last months issue September small number AMA member subscribers sent duplicate copies Anyone re ceived duplicate copy please give modeling friend doesnt receive maga zine isnt necessary return extra copynor necessary notify us duplication problem already has rectified Carl R Wheeley Editor & Publisher GUESS WORK OUT OF STARTING get quick start time new Buzz-BoxTM Simply connect glow plug flip prop change pitch buzzing sound emitted unique plug driver pat pend tells exactly what happening inside com bustion chamber know immediately what problem SHORTED OR OPEN PLUG DAMAGED OR DEFECTIVE PLUG FLOODED ENGINE FOULED OR LOADED PLUG LACK OF FUEL WRONG FUEL/AIR MIXTURE . -Box also maintains constant plug temperature clearing floods instantly adjustable drive both normal R/G plugs unit features rechargeable ni-cad battery compact self-contained draws power demand retail price remarkable diagnostic tool $4995 $2995 kit Add $200 postage handling within continental US Connecticut residents add sales tax DEALER INQUIRIES INVITED 2 planes have wing stab resemble real airplanelittle else does upgrade image modeling miniature airplanes just take SE-5 AT-6 P-51 enter Masters Pattem n toy airplanes will eat alive events like Scale just use scaled power breezeand get bumped around just like real scale bumpsand watch upgraded powerful toy-like Scale miniature air plane give fits Like have created image toy airplanes rules just what deserve Fun isnt Eldon Wilson San Angelo TX Propellers Work appear two principal schools thought propellers work geometric pitch providing handy dividing line between holds thrust equal rate change momentum air upon propeller acts effective pitch must fall short ideal geometric pitch extent various losses resulting exchange other holds lifting surface happens rotate propeller can does exceed geometric pitch first case impetus seen reaction air thrust rearward vane second least partially drawing forward due lift forces kind commonly associate wing would like communicate anyone has ideas evidence support either views qualifications manner have attempted describe Richard Miller 368 Rock Springs Rd Escondido CA 92026 Some interesting points will come out no doubt Please communicate directly Mr Miller Bakers B-25 Im enclosing photo 20-sized B-25 built Frank B Bakers design featured March 1979 MA hadnt interested twin-engine aircraft until just recently though have flying RC long time got bug really got bad thumbed through back issues MA until came Bakers B-25 ordered plans 8 Model Aviation TAKE THE K PO Box 3352 Stamford CT 06905 set out eniarge sue plans bithoping could get away Im proud say successful B-25 has span 53Ys area 3436 sq fuselage 37 long about 2 longer plans wing removable put Continued page 122 Letters Editor Continued page 8 steerable nose wheel coupled ailerons use two OS ower Ace threechannel guidance weighs 4V2 lb color scheme olive drab planes name numbers taken Squadron Signals Publication B-25 sheer coinci dence name plane happened wifes name Patricia Ann Talk about running up some pointsat least hundred Id say whole project took about three weeks construct another four five weeks waiting wind quit blowing Finally test flown successfully May 25 1981 Im proud say its great flying machine very realistic way thats Patricia Ann picture namesake Enjoy magazine very much Keep up good work Jill Kittel Airchild A R Kawczynski Duncan OK During preparation article Airchild published November 1979 issue MA number photos taken model company charming young lady Jill Kittel art student time Several photos sent Hank Clark use preparation superb cut away drawing model thought both models outstanding wrote say what wonderful cover would make Alas fate intervened form Nats Jill wound up proverbial cutting room floor Jill disappointed Hank desolate delighted Herb Silbermanos layout forgave oversight Although couple years have passed Hank wont forget has recently wondered what became up-till-now invisible woman Well Jill alive well working artist advertising agency Madison Perhaps could resolve printing out-takes make Jill happy happy Hank will happy have keep writingwhich takes him away drawing board Owen Kampen Madison WI Weve asked Herb Silbermann see fhe can work some layout magic place letter associated picture Jill Kittel Airchild can printed color some what originally intended case renews interest Airchild wed best tell little about Its RC sport model based famous Fairchild 24 forfour channels 23 power Full-s ize plans availablefor$4 50 plan No 281 Scale Control Cable Systems June 1981 Letters column comment Scale Cable Systems involving Geo McGinnis Norman Rosenstock Editor Rosenstock author Church Midwing article January 1981 issue used cable control system hate picky drawing ac companied letters correct showing control cable systems full-scale aircraft period such real airplanes rocker arm listed bellcrank MA drawing vertical position rather horizontal shown Also two cables tops elevator horns equal length cables bottoms elevator control horns form V having equal length legs Additionally real airplanes two cable systems crossed other enroute theelevator control stick joy stick such bottom cables went upper part stick upper cables went lower part stick rocker arm/bar system developed cables went bar secondary single cable rigid pushrod went stick case secondary cables crossed enroute elevator cables came fuselage less horizontally pushrod secondary system rod coming bottom stick top rocker arm Ordinarily wouldnt bother mention helped rebuilt lot antique real airplanes including Heath also Frank Tallmans old Farman Shorthorn real rigging nightmare years ago model judge large Los Angeles Scale meet would knock off points found cable system shown MA drawing going trouble build scale cable system should correct Gordon Codding Kingman AZ Weforwarded above letter Norm Rosenstock wrote Mr Codding cable system shown June Letters column intended appear scale externally Church Midwing Rosenstock control system designed Sport Scale Giant Scale just sport flying such models judged visually distancerather close-up examination measurement case Precision Scale way Codding has wealth Scale modeling data including originalfactory draw ings WW early home-built aircraft Send SA SE listing Gordon Codding 3 724 John L Ave Kingman AZ 86401 RC Trainers agree 66-year-old Graham Selick con cerning so-called trainers market today Letters February 1981 MA verge buying popular bomb trainers 40 engine changed mind after seeing two beautifully-built trainers maiden flights screw themselves ground think end two potential RC pilot careers took home $250 work scrap bushel basket read ad Craft-Air about Piece 0 Cake like part said flies slow-w-w 16 mph economical 6-ft wingspan part about 6 05/sq ft wing loading built have about 30 flights far honestly feel way start RC us old geezers dumb thumbs slow reflexes get trouble nothing found plane knows fly better pilot flies like dream like nightmare course alignment center gravity CG very important learned hard way Republic Aviation worked 31 years Did know real ones occasion ally have warped wings test pilots flight crab sheet would report roll-off problems would happen once great left wing plus side contour tolerance right wing minus side vice versa problem corrected designing eccentric wing hinge bushings wing attach bolts could rotated slightly increase decrease wing incidence obtain match Joe Nelson Stroudsburg PA 1 22 Model Aviation EDITORS NOTE Bill Warners FF Scale column last month mentioned Earl Stahl plans can asking Smithsonian library isnt quite true Librarian informs us holdings magazines listed occasionally complete have issue plan want theyll gladly send copy Send $1 cover handling duplication SASE.DR P
Edition: Model Aviation - 1981/10
Page Numbers: 6, 8, 122
II ~4fem 4d&54 / $9900 DELIVERED VISA Four Folding Legs Wing & Fuselage Holders Add $400 Shipping calif 6% Tax RAC Products408 274-1915 3200 Knightswood Way 0 San Jose CA 95148 Xetters t 6d letters will carefully considered general interest used Send Model Aviation 815 15th St NW Washington DC 20005 Space Shuttle Antenna Coupling Problem article Space Shuttle did present detail problem antenna coupling since reminded problem until experienced week before press date some guidelines must deal problem Antenna coupling term refers two receivers interacting other causing control problems antennas too close other Just such prob lem occurs Shuttle mounted back carrying plane Shuttle antenna runs parallel powered models antenna Some have operated several receivers together no problem exceptions Most equipment can modified handle problem simplest solution use separate frequency bands will stop reaction almost time Most people think three bands avail able purpose solving problem fourwhich big help anyone doesnt have Ham license tend group 75 MHz frequency 72 MHz band flying adjacent models can operate receiver 72 MHz 75 MHz no reactions instance have no problem flying RC para chutist 72080 J-3 Cub 75 Flying Shuttle 27 MHz equally suitable intend fly combination close frequency question try following test guideline First tach models together rangecheck model separately trans mitter antennas down test models both radios should no unus ual noise neutral nor glitches nor limited throw servos Check three points carefully radios pass obvi ous test turn off Shuttle transmitter shuttle carrying model both respond remaining transmitter link Thats right trans mitter operating another adjacent receiver transmitters frequency fly consider radio inferior tan dem-mounted receivers rare manu facturers consider priority design correct receivers seem isolated properly occasional glitching try place antennas right angle other greatest distance other Also try wood tow rack instead wire greatly condensed treatment subject hope will keep Shuttle fliers out trouble am now flying much larger Space Shut tle well baby article September issue hope MA read ers enjoying Shuttle much am Its favorite models fly Im put ting engine now building up nerve fly rockets Luther Hux Annandale VA Luther wanted us get change Space Shuttle article relating above information September issue already process being printed time could revise picture caption alert readers potential problem Miniature Aircraft vs Toys time time read hobby being referred playing toy airplanes read further within modeling publications need improve image modeling miniature airplanes dont quite get observations being newcomer after 50 years stuff use AMA rules set up very nicely protect image playing toy airplanes Take look flying field 90% Continued page 8 6 Model Aviation rLiqhr NOTICE Due error concerning address labels last months issue September small number AMA member subscribers sent duplicate copies Anyone re ceived duplicate copy please give modeling friend doesnt receive maga zine isnt necessary return extra copynor necessary notify us duplication problem already has rectified Carl R Wheeley Editor & Publisher GUESS WORK OUT OF STARTING get quick start time new Buzz-BoxTM Simply connect glow plug flip prop change pitch buzzing sound emitted unique plug driver pat pend tells exactly what happening inside com bustion chamber know immediately what problem SHORTED OR OPEN PLUG DAMAGED OR DEFECTIVE PLUG FLOODED ENGINE FOULED OR LOADED PLUG LACK OF FUEL WRONG FUEL/AIR MIXTURE . -Box also maintains constant plug temperature clearing floods instantly adjustable drive both normal R/G plugs unit features rechargeable ni-cad battery compact self-contained draws power demand retail price remarkable diagnostic tool $4995 $2995 kit Add $200 postage handling within continental US Connecticut residents add sales tax DEALER INQUIRIES INVITED 2 planes have wing stab resemble real airplanelittle else does upgrade image modeling miniature airplanes just take SE-5 AT-6 P-51 enter Masters Pattem n toy airplanes will eat alive events like Scale just use scaled power breezeand get bumped around just like real scale bumpsand watch upgraded powerful toy-like Scale miniature air plane give fits Like have created image toy airplanes rules just what deserve Fun isnt Eldon Wilson San Angelo TX Propellers Work appear two principal schools thought propellers work geometric pitch providing handy dividing line between holds thrust equal rate change momentum air upon propeller acts effective pitch must fall short ideal geometric pitch extent various losses resulting exchange other holds lifting surface happens rotate propeller can does exceed geometric pitch first case impetus seen reaction air thrust rearward vane second least partially drawing forward due lift forces kind commonly associate wing would like communicate anyone has ideas evidence support either views qualifications manner have attempted describe Richard Miller 368 Rock Springs Rd Escondido CA 92026 Some interesting points will come out no doubt Please communicate directly Mr Miller Bakers B-25 Im enclosing photo 20-sized B-25 built Frank B Bakers design featured March 1979 MA hadnt interested twin-engine aircraft until just recently though have flying RC long time got bug really got bad thumbed through back issues MA until came Bakers B-25 ordered plans 8 Model Aviation TAKE THE K PO Box 3352 Stamford CT 06905 set out eniarge sue plans bithoping could get away Im proud say successful B-25 has span 53Ys area 3436 sq fuselage 37 long about 2 longer plans wing removable put Continued page 122 Letters Editor Continued page 8 steerable nose wheel coupled ailerons use two OS ower Ace threechannel guidance weighs 4V2 lb color scheme olive drab planes name numbers taken Squadron Signals Publication B-25 sheer coinci dence name plane happened wifes name Patricia Ann Talk about running up some pointsat least hundred Id say whole project took about three weeks construct another four five weeks waiting wind quit blowing Finally test flown successfully May 25 1981 Im proud say its great flying machine very realistic way thats Patricia Ann picture namesake Enjoy magazine very much Keep up good work Jill Kittel Airchild A R Kawczynski Duncan OK During preparation article Airchild published November 1979 issue MA number photos taken model company charming young lady Jill Kittel art student time Several photos sent Hank Clark use preparation superb cut away drawing model thought both models outstanding wrote say what wonderful cover would make Alas fate intervened form Nats Jill wound up proverbial cutting room floor Jill disappointed Hank desolate delighted Herb Silbermanos layout forgave oversight Although couple years have passed Hank wont forget has recently wondered what became up-till-now invisible woman Well Jill alive well working artist advertising agency Madison Perhaps could resolve printing out-takes make Jill happy happy Hank will happy have keep writingwhich takes him away drawing board Owen Kampen Madison WI Weve asked Herb Silbermann see fhe can work some layout magic place letter associated picture Jill Kittel Airchild can printed color some what originally intended case renews interest Airchild wed best tell little about Its RC sport model based famous Fairchild 24 forfour channels 23 power Full-s ize plans availablefor$4 50 plan No 281 Scale Control Cable Systems June 1981 Letters column comment Scale Cable Systems involving Geo McGinnis Norman Rosenstock Editor Rosenstock author Church Midwing article January 1981 issue used cable control system hate picky drawing ac companied letters correct showing control cable systems full-scale aircraft period such real airplanes rocker arm listed bellcrank MA drawing vertical position rather horizontal shown Also two cables tops elevator horns equal length cables bottoms elevator control horns form V having equal length legs Additionally real airplanes two cable systems crossed other enroute theelevator control stick joy stick such bottom cables went upper part stick upper cables went lower part stick rocker arm/bar system developed cables went bar secondary single cable rigid pushrod went stick case secondary cables crossed enroute elevator cables came fuselage less horizontally pushrod secondary system rod coming bottom stick top rocker arm Ordinarily wouldnt bother mention helped rebuilt lot antique real airplanes including Heath also Frank Tallmans old Farman Shorthorn real rigging nightmare years ago model judge large Los Angeles Scale meet would knock off points found cable system shown MA drawing going trouble build scale cable system should correct Gordon Codding Kingman AZ Weforwarded above letter Norm Rosenstock wrote Mr Codding cable system shown June Letters column intended appear scale externally Church Midwing Rosenstock control system designed Sport Scale Giant Scale just sport flying such models judged visually distancerather close-up examination measurement case Precision Scale way Codding has wealth Scale modeling data including originalfactory draw ings WW early home-built aircraft Send SA SE listing Gordon Codding 3 724 John L Ave Kingman AZ 86401 RC Trainers agree 66-year-old Graham Selick con cerning so-called trainers market today Letters February 1981 MA verge buying popular bomb trainers 40 engine changed mind after seeing two beautifully-built trainers maiden flights screw themselves ground think end two potential RC pilot careers took home $250 work scrap bushel basket read ad Craft-Air about Piece 0 Cake like part said flies slow-w-w 16 mph economical 6-ft wingspan part about 6 05/sq ft wing loading built have about 30 flights far honestly feel way start RC us old geezers dumb thumbs slow reflexes get trouble nothing found plane knows fly better pilot flies like dream like nightmare course alignment center gravity CG very important learned hard way Republic Aviation worked 31 years Did know real ones occasion ally have warped wings test pilots flight crab sheet would report roll-off problems would happen once great left wing plus side contour tolerance right wing minus side vice versa problem corrected designing eccentric wing hinge bushings wing attach bolts could rotated slightly increase decrease wing incidence obtain match Joe Nelson Stroudsburg PA 1 22 Model Aviation EDITORS NOTE Bill Warners FF Scale column last month mentioned Earl Stahl plans can asking Smithsonian library isnt quite true Librarian informs us holdings magazines listed occasionally complete have issue plan want theyll gladly send copy Send $1 cover handling duplication SASE.DR P