PHOTO Documentation Knowledgeable contest judges given choice between details shapes shown 3-view drawing also photos will usually take photo reliable information source Having fooled 3-view drawings numerous occasions past cannot help agree choice Unless hard dimensions given feature model being designed dimensioned detail drawings used prototype modeler helpless determine degree exactness shapes sizes positions will produce superior plane Planes suffer inexactness whether kit scratch-built familiar everyone famous racing plane example has photoAt DCRC Beltsville Contest Phil Sibilles Spitfire landed left wheel right wing tip touching prop Right wheel stuck up position Preston photograph graphed profusely during its lifetime will quite familiar modelers judges obviously off-scale some respect such having too short landing gear wheels too small too wide apart engine compartment undersized faults will painfully apparent anyone good sense proportions Some changes may intentional Udo Menkes Messerschrniu Mel u iii spe1acuIar nign apsag pass overOla waroen eroarome ngIana 111gm ou iooing ai pounus hoof Power adequate two Webrs 91 engines Modelers allowed use Old Warden Airfield special Sundays throughoutsummer 24 Model Aviation Duke Fox snapped George Myers WRAMS Show wants know Fox Twin production Basically pair 60s back back puts Out 3 hp 14500 rpm Simultaneous opposed firing low vibration massively built handle large propellers Nick Ziroli shows latest creation Midwest RK-20 fanjet unit deHavilland Vampire Power K&B 35cc Electric starter can used removing canopy forward section Myers pic modeler fault drawings Sport Scale common increase wing tail surface areas improve flight characteris tics changes easy detect usual viewing distance However WW II fighter landing gear shortened because flying props require long gear will have handicap appearance because eyesore Static score down grading such fault must offset ground handling portion flight score make worthwhile change Can photos used modelers correct glaring errors found drawings can camera properly positioned minimize distortion brings up point using photos design during construction three last four models have built abundance photographic data foundation detailed information though factorytype drawings also used good fortune have access prototypes planes could make 50 100 sharp photos fourth plane DeHavilland 71 Tiger Moth racer built 3-views photos published Model Aviation proved somewhat frustrating after having previously spoiled too much material again build model dependence experience imagination order achieve acceptable result meager origins Everything depends course viewpoint individual modeler Some may find satisfaction scale-like ren dition flies well caring little ultimate detail precise dimensions particularly contest judge will never see plane Others may spend time research construction will go great lengths build fund informa tion before cutting first balsa will travel distance view thoroughly measure sketch photograph tiny detail knowing memory undepend able preponderance scale modelers will fall somewhere between two extremes airplane foremost interest documentation secon dary consideration set photographs serves single purpose records detail refer ence during construction forms nucleus scale presentation prove authenticity model intended competition Sport Scale contestant confined maximum six pages documentation Having abundance photos choose luxury often enjoyed Precision Scale no limit quantity except care must exercised confuse judges cer tainly use photos detail reproduced model Admittedly choice subject restricted modeler insists upon finding thoroughly photo graphing prototype Having chosen remove mys teries possible prefer have prototype available least once during Continued page 106 July1979 25 old timers 25 years RC Larry Jensen placed second Southwestern Championship Sport Scale straight-tail Bonanza kitted LF Randolph pic Colibri MB 2 flown World Championships Erwin Hirt Switzerland 1 /3-scale 71-in span 10 lb 12 oz Webra Speed 61 engine Silk covered finished dope enamel Ducted fan North American F86F Saber Jet built D&B kit Dave Brown Excellent finish achieved K&B Superpoxy Powerplant RR 65 5 II fO1-flO PROPELLERS polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 5-3each 5-45%-35&-430d 63643W 747-6785 848-6886W 949-697 9-810-410685dneeds 11-411611-8Si 12412512-6S150 2 Blade Pusher 5/ 3 5-46-36-43W 868W 9610-6Si 3 Blade Tractor 53 63 645O 3 Blade Pusher 6350d3 4a- Blade Metallic Aluminum Color Tractor 1678 Si 8688$125 96 106104SiSO Pusher1065150 Sizes pitches styles RC Scale/Wischers continued tram page 25 design stage use 35mm cameras loaded black-and-white film using color film recording finish color marking data film purchased bulk 100-ft rolls reduce cost spooled cartridges total darkness Fine-grain developer per mits large blow-ups detail Two rolls 36 exposures will cover area including interiors Cost black-and-white nega tives about 2 per frame 5 X 7 prints made home will less 10 Traveling find prototype expen sive part research Overall views both sides front rear best general arrangement top view great value practical impossibility Wear coveralls pho tos can made ground level surprising amount hidden detail airplane bottoms Ifmeasurements taken photos wide-angle lens will sometimes introduce distortions make useless because lens exaggerates perspective Use normal longer focal length lenses wide-angle lens handy confined cockpit interior find direct views surface being photographed parallel film plane useful determining dimensions single dimen sion needed establish base As example photo made cowl front facing directly prop center steel tape rule used measure overall width photo enlargement feature will proportion width cowl opening spinner diameter screw locations prop width length can measured photo dimen sions found mathematically direct side view fuselage knowing GRISH LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully carved Graftsman addshis own final touches RIGHT HAND TRACTOR 3IB BORE ALL SIZES IN18 $7 68&1OPITCH 20 8 22 10 24 13 NEWSIZE 8PITCH 26 $16 GRISH BROSINDIANA 46373 overall length can used insignia size locations length width trim colors openings hatches steps stringer locations length relieves modeler having check dimension detail steel tape direct side front view cannot taken alternate method free-hand sketches dimensions As example plane being modeled differs drawing addition wheel pants side view overall dimension required duplication pants Another photo inside will show mounting method description methods will seem elementary experienced old-timers letters indicate need discuss steps scaling photos Control Surface Flutten Flutter can lead disaster necessarily restricted models alone 48 years ago flying recently hopped-up rebuilt Travel Air Mystery 5 Jimmy Doolittle exceeded pre vious speeds introduced severe case aileron flutter Before plane could slowed aileron depar ted taking sizeable portion wing Fortunately Jimmy survived diag nose ailments caused problem Travel Air friese-type ailerons over-balanced hinge line too far rearward relative leading edge fault may great conse quence model planes second affliction something quite familiar too much flexi bility torque tubes operated ailerons Aileron flutter can occur speed builds during maneuvers ground hear buzzing humming sound Good hinges may withstand first attack flutter recurrence will weaken undesireable results Flutter can induced number weaknesses such flexibility torque tubes rods Within aileron itself long soft enough twist easily flutter less likely occur aileron bellcrank near center rather end Reducing width can help scale appearance doesnt suffer too badly Soft linkages bellcranks leading servo may also mounted too flexibly can contribute flutter Sealing aileron gaps narrow tape stopping flow air through gap can sometimes help Surest cure reduce flexibility during construc tion using large torque tubes never less eter long tubes Although torque tubes seldom used sport-type planes quite common scale because no unsightly exter nal horns ailerons operated pushrods bellcranks reduce clearance pivots Resist temptation drill out bellcrank holes free operation bellcrank mounted too small pivot screw can also contribute have seen servos mounted usual rubber grommets could visibly shifted manually moving aileron models susceptible flutter will help know look trouble source Violent flutter can damage servo buzzing sound suddenly servo ceases function Can wing ailerons flutter has happened lightly built wing perfec tly safe slower speeds Let speed build reason whole wing can suddenly destroy itself Speed can increase inadvertently bottom loop elevator control relaxed too early during normal turn rudder drops nose sufficient elevator control Bill Winter tells seeing 90 span light-weight model cruising peacefully level very slight wind suddenly fluttering tearing off wing panel diagnosed effect covering tight enought Years ago flew stunt ships eight-ounce wings 35 engine tweaking lions tail got away because silk covering tightly doped Bill also tells rudder developed flutter such violence hinges torn right out plywood remembers extreme elevator flutter vibrated other servos senseless plane con tinued vertically ground cure tail surface flutter strong push-rods no play linkages firmly mounted servos Parts Catalog search drive mechanisms operate gun turrets canopies landing gears other gadgets catalogs Stock Drive Products has fed imagi nations have number catalogs two list thousands useful parts scale modelers Rack pinion drives straight-line motion listed brass steel lightweight nylon very small 106 Model Aviation I AT YOUR DEALER THE ONLY THREADED COUPLER WITH THE SLOT THAT HITS THE SPOT 0esOu~s roei,v Just simple slot takes guesswork out soldering wire coupler slot lets see sure solder has flowed around wire Sullivan 2/56 Threaded Brass Coupler Leave Marty Sullivan little things mean much s Sullivan touch Insist slot chamfer shoulder too BC 6/7 00 SMOOOTH LANDINGS 74 K Strong lightweight REALISTIC landing gears eliminate erratic vibra tion feature short fulcrum ground hugging ability Caster ac tion Adjustable pressure Easy customize Sizes fit wheels 1 3 AND NOW THERES FUELER WITh TRUE FILTER SYSTEM TOO Get double filtration perform ance Sullivan Crap Trap fuel up too Two different sized filters keep particles out tank Fueler comes complete 4 feet Sulli-Cone tubing 3 feet lesser quality tubing tubing WONT COLLAPSE defueling Only $250 P R 0 D U C T S N C 585 DAVISVILLE ROAD OW GROVE PA 19090 215 650-3900 sizes ideal operating features Pinions pinion wire helical gears worms worm gears molded miter gears various mate rials bevel gears spur gears ball bearings bores small milli meter 0469 just few ofthe items Handbook Stock Gears catalog SDP 75 $295 postpaid second catalog interest scale modelers lists belt chain drives list includes toothed timing belts polyure thane elastomer reinforced polyester cord sizes small 047 thick 125 wide range toothed pulleys aluminum fiberglass reinforced Lexan steel molded fiberglass Delrin match Also listed polyester cord flat belts pulleys V-belts round belts chain drives 218 page Handbook Small Belt Chain Drive catalog SDP 651 $195 postpaid address Stock Drive Products 55 South Denton Ave New Hyde Park NY 11040 Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafleld WI 5301& RC Soaring/Pruss continued page 27 dark blue trim color combo really set off rest Its always peeve scribe display type Toledo past sailplanes werent class selves regards finish detailing no pollution generator up front fact models well outlast couple flying seasons Im speaking others theres little reason sailplanes being show stoppers Hopefully Bates Pratt Corven Tiahrt have set pace Seen heard about Toledo Besides maroon-and-cream Monokote men tioned two new colors available gold burnt red Top Flite Models Inc 1901 N Narragansett Ave Chicago IL 60639 free Monokote sample 12-page catalog send 50 cents above address Cox Hobbies showed new Aquila Grande fiber glass fuselage Kit quality best tradition Lee Renaud wide range radios also displayed Call Cox action hotline 800 8543544 California 18004327277 write Cox Hobbies Inc 1505 E Warner Ave Santa Ana Ca 92702 Craft-Air Tom Williams showed Viking Tom pointed out comes choice rib sections modeler can purchase second other wing direct Craft-Air discount wing uses 11-percent flat-bottom airfoil other 12-percent semi-symmetrical wing Write Craft-Air Inc 20115 Nord hoff St Chatsworth CA 91311 Fab-Tek Inc showed new sport winch light-weight package thought body-building program pre requisite toting launching devices will allow use PLANS7 MAP range plans England largest compre hensive world Buy plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Handbook 1 Aeiomodlling Handbook 2 MOdE Boats Cars Handbook 3 Model Engineering Handbook 4 Radio ControlAircraft model & Allied MAPPublicotions Ltd AvailableintheUSA Pnce *150 including postage Salee Office PO Box 35 BrIdge Street Hemputeed HorSe NM lEE HemelEngland July1979 107 SINGLE . $350 SET OF 3 $995
Edition: Model Aviation - 1979/07
Page Numbers: 24, 25, 106, 107
PHOTO Documentation Knowledgeable contest judges given choice between details shapes shown 3-view drawing also photos will usually take photo reliable information source Having fooled 3-view drawings numerous occasions past cannot help agree choice Unless hard dimensions given feature model being designed dimensioned detail drawings used prototype modeler helpless determine degree exactness shapes sizes positions will produce superior plane Planes suffer inexactness whether kit scratch-built familiar everyone famous racing plane example has photoAt DCRC Beltsville Contest Phil Sibilles Spitfire landed left wheel right wing tip touching prop Right wheel stuck up position Preston photograph graphed profusely during its lifetime will quite familiar modelers judges obviously off-scale some respect such having too short landing gear wheels too small too wide apart engine compartment undersized faults will painfully apparent anyone good sense proportions Some changes may intentional Udo Menkes Messerschrniu Mel u iii spe1acuIar nign apsag pass overOla waroen eroarome ngIana 111gm ou iooing ai pounus hoof Power adequate two Webrs 91 engines Modelers allowed use Old Warden Airfield special Sundays throughoutsummer 24 Model Aviation Duke Fox snapped George Myers WRAMS Show wants know Fox Twin production Basically pair 60s back back puts Out 3 hp 14500 rpm Simultaneous opposed firing low vibration massively built handle large propellers Nick Ziroli shows latest creation Midwest RK-20 fanjet unit deHavilland Vampire Power K&B 35cc Electric starter can used removing canopy forward section Myers pic modeler fault drawings Sport Scale common increase wing tail surface areas improve flight characteris tics changes easy detect usual viewing distance However WW II fighter landing gear shortened because flying props require long gear will have handicap appearance because eyesore Static score down grading such fault must offset ground handling portion flight score make worthwhile change Can photos used modelers correct glaring errors found drawings can camera properly positioned minimize distortion brings up point using photos design during construction three last four models have built abundance photographic data foundation detailed information though factorytype drawings also used good fortune have access prototypes planes could make 50 100 sharp photos fourth plane DeHavilland 71 Tiger Moth racer built 3-views photos published Model Aviation proved somewhat frustrating after having previously spoiled too much material again build model dependence experience imagination order achieve acceptable result meager origins Everything depends course viewpoint individual modeler Some may find satisfaction scale-like ren dition flies well caring little ultimate detail precise dimensions particularly contest judge will never see plane Others may spend time research construction will go great lengths build fund informa tion before cutting first balsa will travel distance view thoroughly measure sketch photograph tiny detail knowing memory undepend able preponderance scale modelers will fall somewhere between two extremes airplane foremost interest documentation secon dary consideration set photographs serves single purpose records detail refer ence during construction forms nucleus scale presentation prove authenticity model intended competition Sport Scale contestant confined maximum six pages documentation Having abundance photos choose luxury often enjoyed Precision Scale no limit quantity except care must exercised confuse judges cer tainly use photos detail reproduced model Admittedly choice subject restricted modeler insists upon finding thoroughly photo graphing prototype Having chosen remove mys teries possible prefer have prototype available least once during Continued page 106 July1979 25 old timers 25 years RC Larry Jensen placed second Southwestern Championship Sport Scale straight-tail Bonanza kitted LF Randolph pic Colibri MB 2 flown World Championships Erwin Hirt Switzerland 1 /3-scale 71-in span 10 lb 12 oz Webra Speed 61 engine Silk covered finished dope enamel Ducted fan North American F86F Saber Jet built D&B kit Dave Brown Excellent finish achieved K&B Superpoxy Powerplant RR 65 5 II fO1-flO PROPELLERS polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 5-3each 5-45%-35&-430d 63643W 747-6785 848-6886W 949-697 9-810-410685dneeds 11-411611-8Si 12412512-6S150 2 Blade Pusher 5/ 3 5-46-36-43W 868W 9610-6Si 3 Blade Tractor 53 63 645O 3 Blade Pusher 6350d3 4a- Blade Metallic Aluminum Color Tractor 1678 Si 8688$125 96 106104SiSO Pusher1065150 Sizes pitches styles RC Scale/Wischers continued tram page 25 design stage use 35mm cameras loaded black-and-white film using color film recording finish color marking data film purchased bulk 100-ft rolls reduce cost spooled cartridges total darkness Fine-grain developer per mits large blow-ups detail Two rolls 36 exposures will cover area including interiors Cost black-and-white nega tives about 2 per frame 5 X 7 prints made home will less 10 Traveling find prototype expen sive part research Overall views both sides front rear best general arrangement top view great value practical impossibility Wear coveralls pho tos can made ground level surprising amount hidden detail airplane bottoms Ifmeasurements taken photos wide-angle lens will sometimes introduce distortions make useless because lens exaggerates perspective Use normal longer focal length lenses wide-angle lens handy confined cockpit interior find direct views surface being photographed parallel film plane useful determining dimensions single dimen sion needed establish base As example photo made cowl front facing directly prop center steel tape rule used measure overall width photo enlargement feature will proportion width cowl opening spinner diameter screw locations prop width length can measured photo dimen sions found mathematically direct side view fuselage knowing GRISH LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully carved Graftsman addshis own final touches RIGHT HAND TRACTOR 3IB BORE ALL SIZES IN18 $7 68&1OPITCH 20 8 22 10 24 13 NEWSIZE 8PITCH 26 $16 GRISH BROSINDIANA 46373 overall length can used insignia size locations length width trim colors openings hatches steps stringer locations length relieves modeler having check dimension detail steel tape direct side front view cannot taken alternate method free-hand sketches dimensions As example plane being modeled differs drawing addition wheel pants side view overall dimension required duplication pants Another photo inside will show mounting method description methods will seem elementary experienced old-timers letters indicate need discuss steps scaling photos Control Surface Flutten Flutter can lead disaster necessarily restricted models alone 48 years ago flying recently hopped-up rebuilt Travel Air Mystery 5 Jimmy Doolittle exceeded pre vious speeds introduced severe case aileron flutter Before plane could slowed aileron depar ted taking sizeable portion wing Fortunately Jimmy survived diag nose ailments caused problem Travel Air friese-type ailerons over-balanced hinge line too far rearward relative leading edge fault may great conse quence model planes second affliction something quite familiar too much flexi bility torque tubes operated ailerons Aileron flutter can occur speed builds during maneuvers ground hear buzzing humming sound Good hinges may withstand first attack flutter recurrence will weaken undesireable results Flutter can induced number weaknesses such flexibility torque tubes rods Within aileron itself long soft enough twist easily flutter less likely occur aileron bellcrank near center rather end Reducing width can help scale appearance doesnt suffer too badly Soft linkages bellcranks leading servo may also mounted too flexibly can contribute flutter Sealing aileron gaps narrow tape stopping flow air through gap can sometimes help Surest cure reduce flexibility during construc tion using large torque tubes never less eter long tubes Although torque tubes seldom used sport-type planes quite common scale because no unsightly exter nal horns ailerons operated pushrods bellcranks reduce clearance pivots Resist temptation drill out bellcrank holes free operation bellcrank mounted too small pivot screw can also contribute have seen servos mounted usual rubber grommets could visibly shifted manually moving aileron models susceptible flutter will help know look trouble source Violent flutter can damage servo buzzing sound suddenly servo ceases function Can wing ailerons flutter has happened lightly built wing perfec tly safe slower speeds Let speed build reason whole wing can suddenly destroy itself Speed can increase inadvertently bottom loop elevator control relaxed too early during normal turn rudder drops nose sufficient elevator control Bill Winter tells seeing 90 span light-weight model cruising peacefully level very slight wind suddenly fluttering tearing off wing panel diagnosed effect covering tight enought Years ago flew stunt ships eight-ounce wings 35 engine tweaking lions tail got away because silk covering tightly doped Bill also tells rudder developed flutter such violence hinges torn right out plywood remembers extreme elevator flutter vibrated other servos senseless plane con tinued vertically ground cure tail surface flutter strong push-rods no play linkages firmly mounted servos Parts Catalog search drive mechanisms operate gun turrets canopies landing gears other gadgets catalogs Stock Drive Products has fed imagi nations have number catalogs two list thousands useful parts scale modelers Rack pinion drives straight-line motion listed brass steel lightweight nylon very small 106 Model Aviation I AT YOUR DEALER THE ONLY THREADED COUPLER WITH THE SLOT THAT HITS THE SPOT 0esOu~s roei,v Just simple slot takes guesswork out soldering wire coupler slot lets see sure solder has flowed around wire Sullivan 2/56 Threaded Brass Coupler Leave Marty Sullivan little things mean much s Sullivan touch Insist slot chamfer shoulder too BC 6/7 00 SMOOOTH LANDINGS 74 K Strong lightweight REALISTIC landing gears eliminate erratic vibra tion feature short fulcrum ground hugging ability Caster ac tion Adjustable pressure Easy customize Sizes fit wheels 1 3 AND NOW THERES FUELER WITh TRUE FILTER SYSTEM TOO Get double filtration perform ance Sullivan Crap Trap fuel up too Two different sized filters keep particles out tank Fueler comes complete 4 feet Sulli-Cone tubing 3 feet lesser quality tubing tubing WONT COLLAPSE defueling Only $250 P R 0 D U C T S N C 585 DAVISVILLE ROAD OW GROVE PA 19090 215 650-3900 sizes ideal operating features Pinions pinion wire helical gears worms worm gears molded miter gears various mate rials bevel gears spur gears ball bearings bores small milli meter 0469 just few ofthe items Handbook Stock Gears catalog SDP 75 $295 postpaid second catalog interest scale modelers lists belt chain drives list includes toothed timing belts polyure thane elastomer reinforced polyester cord sizes small 047 thick 125 wide range toothed pulleys aluminum fiberglass reinforced Lexan steel molded fiberglass Delrin match Also listed polyester cord flat belts pulleys V-belts round belts chain drives 218 page Handbook Small Belt Chain Drive catalog SDP 651 $195 postpaid address Stock Drive Products 55 South Denton Ave New Hyde Park NY 11040 Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafleld WI 5301& RC Soaring/Pruss continued page 27 dark blue trim color combo really set off rest Its always peeve scribe display type Toledo past sailplanes werent class selves regards finish detailing no pollution generator up front fact models well outlast couple flying seasons Im speaking others theres little reason sailplanes being show stoppers Hopefully Bates Pratt Corven Tiahrt have set pace Seen heard about Toledo Besides maroon-and-cream Monokote men tioned two new colors available gold burnt red Top Flite Models Inc 1901 N Narragansett Ave Chicago IL 60639 free Monokote sample 12-page catalog send 50 cents above address Cox Hobbies showed new Aquila Grande fiber glass fuselage Kit quality best tradition Lee Renaud wide range radios also displayed Call Cox action hotline 800 8543544 California 18004327277 write Cox Hobbies Inc 1505 E Warner Ave Santa Ana Ca 92702 Craft-Air Tom Williams showed Viking Tom pointed out comes choice rib sections modeler can purchase second other wing direct Craft-Air discount wing uses 11-percent flat-bottom airfoil other 12-percent semi-symmetrical wing Write Craft-Air Inc 20115 Nord hoff St Chatsworth CA 91311 Fab-Tek Inc showed new sport winch light-weight package thought body-building program pre requisite toting launching devices will allow use PLANS7 MAP range plans England largest compre hensive world Buy plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Handbook 1 Aeiomodlling Handbook 2 MOdE Boats Cars Handbook 3 Model Engineering Handbook 4 Radio ControlAircraft model & Allied MAPPublicotions Ltd AvailableintheUSA Pnce *150 including postage Salee Office PO Box 35 BrIdge Street Hemputeed HorSe NM lEE HemelEngland July1979 107 SINGLE . $350 SET OF 3 $995
Edition: Model Aviation - 1979/07
Page Numbers: 24, 25, 106, 107
PHOTO Documentation Knowledgeable contest judges given choice between details shapes shown 3-view drawing also photos will usually take photo reliable information source Having fooled 3-view drawings numerous occasions past cannot help agree choice Unless hard dimensions given feature model being designed dimensioned detail drawings used prototype modeler helpless determine degree exactness shapes sizes positions will produce superior plane Planes suffer inexactness whether kit scratch-built familiar everyone famous racing plane example has photoAt DCRC Beltsville Contest Phil Sibilles Spitfire landed left wheel right wing tip touching prop Right wheel stuck up position Preston photograph graphed profusely during its lifetime will quite familiar modelers judges obviously off-scale some respect such having too short landing gear wheels too small too wide apart engine compartment undersized faults will painfully apparent anyone good sense proportions Some changes may intentional Udo Menkes Messerschrniu Mel u iii spe1acuIar nign apsag pass overOla waroen eroarome ngIana 111gm ou iooing ai pounus hoof Power adequate two Webrs 91 engines Modelers allowed use Old Warden Airfield special Sundays throughoutsummer 24 Model Aviation Duke Fox snapped George Myers WRAMS Show wants know Fox Twin production Basically pair 60s back back puts Out 3 hp 14500 rpm Simultaneous opposed firing low vibration massively built handle large propellers Nick Ziroli shows latest creation Midwest RK-20 fanjet unit deHavilland Vampire Power K&B 35cc Electric starter can used removing canopy forward section Myers pic modeler fault drawings Sport Scale common increase wing tail surface areas improve flight characteris tics changes easy detect usual viewing distance However WW II fighter landing gear shortened because flying props require long gear will have handicap appearance because eyesore Static score down grading such fault must offset ground handling portion flight score make worthwhile change Can photos used modelers correct glaring errors found drawings can camera properly positioned minimize distortion brings up point using photos design during construction three last four models have built abundance photographic data foundation detailed information though factorytype drawings also used good fortune have access prototypes planes could make 50 100 sharp photos fourth plane DeHavilland 71 Tiger Moth racer built 3-views photos published Model Aviation proved somewhat frustrating after having previously spoiled too much material again build model dependence experience imagination order achieve acceptable result meager origins Everything depends course viewpoint individual modeler Some may find satisfaction scale-like ren dition flies well caring little ultimate detail precise dimensions particularly contest judge will never see plane Others may spend time research construction will go great lengths build fund informa tion before cutting first balsa will travel distance view thoroughly measure sketch photograph tiny detail knowing memory undepend able preponderance scale modelers will fall somewhere between two extremes airplane foremost interest documentation secon dary consideration set photographs serves single purpose records detail refer ence during construction forms nucleus scale presentation prove authenticity model intended competition Sport Scale contestant confined maximum six pages documentation Having abundance photos choose luxury often enjoyed Precision Scale no limit quantity except care must exercised confuse judges cer tainly use photos detail reproduced model Admittedly choice subject restricted modeler insists upon finding thoroughly photo graphing prototype Having chosen remove mys teries possible prefer have prototype available least once during Continued page 106 July1979 25 old timers 25 years RC Larry Jensen placed second Southwestern Championship Sport Scale straight-tail Bonanza kitted LF Randolph pic Colibri MB 2 flown World Championships Erwin Hirt Switzerland 1 /3-scale 71-in span 10 lb 12 oz Webra Speed 61 engine Silk covered finished dope enamel Ducted fan North American F86F Saber Jet built D&B kit Dave Brown Excellent finish achieved K&B Superpoxy Powerplant RR 65 5 II fO1-flO PROPELLERS polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 5-3each 5-45%-35&-430d 63643W 747-6785 848-6886W 949-697 9-810-410685dneeds 11-411611-8Si 12412512-6S150 2 Blade Pusher 5/ 3 5-46-36-43W 868W 9610-6Si 3 Blade Tractor 53 63 645O 3 Blade Pusher 6350d3 4a- Blade Metallic Aluminum Color Tractor 1678 Si 8688$125 96 106104SiSO Pusher1065150 Sizes pitches styles RC Scale/Wischers continued tram page 25 design stage use 35mm cameras loaded black-and-white film using color film recording finish color marking data film purchased bulk 100-ft rolls reduce cost spooled cartridges total darkness Fine-grain developer per mits large blow-ups detail Two rolls 36 exposures will cover area including interiors Cost black-and-white nega tives about 2 per frame 5 X 7 prints made home will less 10 Traveling find prototype expen sive part research Overall views both sides front rear best general arrangement top view great value practical impossibility Wear coveralls pho tos can made ground level surprising amount hidden detail airplane bottoms Ifmeasurements taken photos wide-angle lens will sometimes introduce distortions make useless because lens exaggerates perspective Use normal longer focal length lenses wide-angle lens handy confined cockpit interior find direct views surface being photographed parallel film plane useful determining dimensions single dimen sion needed establish base As example photo made cowl front facing directly prop center steel tape rule used measure overall width photo enlargement feature will proportion width cowl opening spinner diameter screw locations prop width length can measured photo dimen sions found mathematically direct side view fuselage knowing GRISH LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully carved Graftsman addshis own final touches RIGHT HAND TRACTOR 3IB BORE ALL SIZES IN18 $7 68&1OPITCH 20 8 22 10 24 13 NEWSIZE 8PITCH 26 $16 GRISH BROSINDIANA 46373 overall length can used insignia size locations length width trim colors openings hatches steps stringer locations length relieves modeler having check dimension detail steel tape direct side front view cannot taken alternate method free-hand sketches dimensions As example plane being modeled differs drawing addition wheel pants side view overall dimension required duplication pants Another photo inside will show mounting method description methods will seem elementary experienced old-timers letters indicate need discuss steps scaling photos Control Surface Flutten Flutter can lead disaster necessarily restricted models alone 48 years ago flying recently hopped-up rebuilt Travel Air Mystery 5 Jimmy Doolittle exceeded pre vious speeds introduced severe case aileron flutter Before plane could slowed aileron depar ted taking sizeable portion wing Fortunately Jimmy survived diag nose ailments caused problem Travel Air friese-type ailerons over-balanced hinge line too far rearward relative leading edge fault may great conse quence model planes second affliction something quite familiar too much flexi bility torque tubes operated ailerons Aileron flutter can occur speed builds during maneuvers ground hear buzzing humming sound Good hinges may withstand first attack flutter recurrence will weaken undesireable results Flutter can induced number weaknesses such flexibility torque tubes rods Within aileron itself long soft enough twist easily flutter less likely occur aileron bellcrank near center rather end Reducing width can help scale appearance doesnt suffer too badly Soft linkages bellcranks leading servo may also mounted too flexibly can contribute flutter Sealing aileron gaps narrow tape stopping flow air through gap can sometimes help Surest cure reduce flexibility during construc tion using large torque tubes never less eter long tubes Although torque tubes seldom used sport-type planes quite common scale because no unsightly exter nal horns ailerons operated pushrods bellcranks reduce clearance pivots Resist temptation drill out bellcrank holes free operation bellcrank mounted too small pivot screw can also contribute have seen servos mounted usual rubber grommets could visibly shifted manually moving aileron models susceptible flutter will help know look trouble source Violent flutter can damage servo buzzing sound suddenly servo ceases function Can wing ailerons flutter has happened lightly built wing perfec tly safe slower speeds Let speed build reason whole wing can suddenly destroy itself Speed can increase inadvertently bottom loop elevator control relaxed too early during normal turn rudder drops nose sufficient elevator control Bill Winter tells seeing 90 span light-weight model cruising peacefully level very slight wind suddenly fluttering tearing off wing panel diagnosed effect covering tight enought Years ago flew stunt ships eight-ounce wings 35 engine tweaking lions tail got away because silk covering tightly doped Bill also tells rudder developed flutter such violence hinges torn right out plywood remembers extreme elevator flutter vibrated other servos senseless plane con tinued vertically ground cure tail surface flutter strong push-rods no play linkages firmly mounted servos Parts Catalog search drive mechanisms operate gun turrets canopies landing gears other gadgets catalogs Stock Drive Products has fed imagi nations have number catalogs two list thousands useful parts scale modelers Rack pinion drives straight-line motion listed brass steel lightweight nylon very small 106 Model Aviation I AT YOUR DEALER THE ONLY THREADED COUPLER WITH THE SLOT THAT HITS THE SPOT 0esOu~s roei,v Just simple slot takes guesswork out soldering wire coupler slot lets see sure solder has flowed around wire Sullivan 2/56 Threaded Brass Coupler Leave Marty Sullivan little things mean much s Sullivan touch Insist slot chamfer shoulder too BC 6/7 00 SMOOOTH LANDINGS 74 K Strong lightweight REALISTIC landing gears eliminate erratic vibra tion feature short fulcrum ground hugging ability Caster ac tion Adjustable pressure Easy customize Sizes fit wheels 1 3 AND NOW THERES FUELER WITh TRUE FILTER SYSTEM TOO Get double filtration perform ance Sullivan Crap Trap fuel up too Two different sized filters keep particles out tank Fueler comes complete 4 feet Sulli-Cone tubing 3 feet lesser quality tubing tubing WONT COLLAPSE defueling Only $250 P R 0 D U C T S N C 585 DAVISVILLE ROAD OW GROVE PA 19090 215 650-3900 sizes ideal operating features Pinions pinion wire helical gears worms worm gears molded miter gears various mate rials bevel gears spur gears ball bearings bores small milli meter 0469 just few ofthe items Handbook Stock Gears catalog SDP 75 $295 postpaid second catalog interest scale modelers lists belt chain drives list includes toothed timing belts polyure thane elastomer reinforced polyester cord sizes small 047 thick 125 wide range toothed pulleys aluminum fiberglass reinforced Lexan steel molded fiberglass Delrin match Also listed polyester cord flat belts pulleys V-belts round belts chain drives 218 page Handbook Small Belt Chain Drive catalog SDP 651 $195 postpaid address Stock Drive Products 55 South Denton Ave New Hyde Park NY 11040 Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafleld WI 5301& RC Soaring/Pruss continued page 27 dark blue trim color combo really set off rest Its always peeve scribe display type Toledo past sailplanes werent class selves regards finish detailing no pollution generator up front fact models well outlast couple flying seasons Im speaking others theres little reason sailplanes being show stoppers Hopefully Bates Pratt Corven Tiahrt have set pace Seen heard about Toledo Besides maroon-and-cream Monokote men tioned two new colors available gold burnt red Top Flite Models Inc 1901 N Narragansett Ave Chicago IL 60639 free Monokote sample 12-page catalog send 50 cents above address Cox Hobbies showed new Aquila Grande fiber glass fuselage Kit quality best tradition Lee Renaud wide range radios also displayed Call Cox action hotline 800 8543544 California 18004327277 write Cox Hobbies Inc 1505 E Warner Ave Santa Ana Ca 92702 Craft-Air Tom Williams showed Viking Tom pointed out comes choice rib sections modeler can purchase second other wing direct Craft-Air discount wing uses 11-percent flat-bottom airfoil other 12-percent semi-symmetrical wing Write Craft-Air Inc 20115 Nord hoff St Chatsworth CA 91311 Fab-Tek Inc showed new sport winch light-weight package thought body-building program pre requisite toting launching devices will allow use PLANS7 MAP range plans England largest compre hensive world Buy plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Handbook 1 Aeiomodlling Handbook 2 MOdE Boats Cars Handbook 3 Model Engineering Handbook 4 Radio ControlAircraft model & Allied MAPPublicotions Ltd AvailableintheUSA Pnce *150 including postage Salee Office PO Box 35 BrIdge Street Hemputeed HorSe NM lEE HemelEngland July1979 107 SINGLE . $350 SET OF 3 $995
Edition: Model Aviation - 1979/07
Page Numbers: 24, 25, 106, 107
PHOTO Documentation Knowledgeable contest judges given choice between details shapes shown 3-view drawing also photos will usually take photo reliable information source Having fooled 3-view drawings numerous occasions past cannot help agree choice Unless hard dimensions given feature model being designed dimensioned detail drawings used prototype modeler helpless determine degree exactness shapes sizes positions will produce superior plane Planes suffer inexactness whether kit scratch-built familiar everyone famous racing plane example has photoAt DCRC Beltsville Contest Phil Sibilles Spitfire landed left wheel right wing tip touching prop Right wheel stuck up position Preston photograph graphed profusely during its lifetime will quite familiar modelers judges obviously off-scale some respect such having too short landing gear wheels too small too wide apart engine compartment undersized faults will painfully apparent anyone good sense proportions Some changes may intentional Udo Menkes Messerschrniu Mel u iii spe1acuIar nign apsag pass overOla waroen eroarome ngIana 111gm ou iooing ai pounus hoof Power adequate two Webrs 91 engines Modelers allowed use Old Warden Airfield special Sundays throughoutsummer 24 Model Aviation Duke Fox snapped George Myers WRAMS Show wants know Fox Twin production Basically pair 60s back back puts Out 3 hp 14500 rpm Simultaneous opposed firing low vibration massively built handle large propellers Nick Ziroli shows latest creation Midwest RK-20 fanjet unit deHavilland Vampire Power K&B 35cc Electric starter can used removing canopy forward section Myers pic modeler fault drawings Sport Scale common increase wing tail surface areas improve flight characteris tics changes easy detect usual viewing distance However WW II fighter landing gear shortened because flying props require long gear will have handicap appearance because eyesore Static score down grading such fault must offset ground handling portion flight score make worthwhile change Can photos used modelers correct glaring errors found drawings can camera properly positioned minimize distortion brings up point using photos design during construction three last four models have built abundance photographic data foundation detailed information though factorytype drawings also used good fortune have access prototypes planes could make 50 100 sharp photos fourth plane DeHavilland 71 Tiger Moth racer built 3-views photos published Model Aviation proved somewhat frustrating after having previously spoiled too much material again build model dependence experience imagination order achieve acceptable result meager origins Everything depends course viewpoint individual modeler Some may find satisfaction scale-like ren dition flies well caring little ultimate detail precise dimensions particularly contest judge will never see plane Others may spend time research construction will go great lengths build fund informa tion before cutting first balsa will travel distance view thoroughly measure sketch photograph tiny detail knowing memory undepend able preponderance scale modelers will fall somewhere between two extremes airplane foremost interest documentation secon dary consideration set photographs serves single purpose records detail refer ence during construction forms nucleus scale presentation prove authenticity model intended competition Sport Scale contestant confined maximum six pages documentation Having abundance photos choose luxury often enjoyed Precision Scale no limit quantity except care must exercised confuse judges cer tainly use photos detail reproduced model Admittedly choice subject restricted modeler insists upon finding thoroughly photo graphing prototype Having chosen remove mys teries possible prefer have prototype available least once during Continued page 106 July1979 25 old timers 25 years RC Larry Jensen placed second Southwestern Championship Sport Scale straight-tail Bonanza kitted LF Randolph pic Colibri MB 2 flown World Championships Erwin Hirt Switzerland 1 /3-scale 71-in span 10 lb 12 oz Webra Speed 61 engine Silk covered finished dope enamel Ducted fan North American F86F Saber Jet built D&B kit Dave Brown Excellent finish achieved K&B Superpoxy Powerplant RR 65 5 II fO1-flO PROPELLERS polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 5-3each 5-45%-35&-430d 63643W 747-6785 848-6886W 949-697 9-810-410685dneeds 11-411611-8Si 12412512-6S150 2 Blade Pusher 5/ 3 5-46-36-43W 868W 9610-6Si 3 Blade Tractor 53 63 645O 3 Blade Pusher 6350d3 4a- Blade Metallic Aluminum Color Tractor 1678 Si 8688$125 96 106104SiSO Pusher1065150 Sizes pitches styles RC Scale/Wischers continued tram page 25 design stage use 35mm cameras loaded black-and-white film using color film recording finish color marking data film purchased bulk 100-ft rolls reduce cost spooled cartridges total darkness Fine-grain developer per mits large blow-ups detail Two rolls 36 exposures will cover area including interiors Cost black-and-white nega tives about 2 per frame 5 X 7 prints made home will less 10 Traveling find prototype expen sive part research Overall views both sides front rear best general arrangement top view great value practical impossibility Wear coveralls pho tos can made ground level surprising amount hidden detail airplane bottoms Ifmeasurements taken photos wide-angle lens will sometimes introduce distortions make useless because lens exaggerates perspective Use normal longer focal length lenses wide-angle lens handy confined cockpit interior find direct views surface being photographed parallel film plane useful determining dimensions single dimen sion needed establish base As example photo made cowl front facing directly prop center steel tape rule used measure overall width photo enlargement feature will proportion width cowl opening spinner diameter screw locations prop width length can measured photo dimen sions found mathematically direct side view fuselage knowing GRISH LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully carved Graftsman addshis own final touches RIGHT HAND TRACTOR 3IB BORE ALL SIZES IN18 $7 68&1OPITCH 20 8 22 10 24 13 NEWSIZE 8PITCH 26 $16 GRISH BROSINDIANA 46373 overall length can used insignia size locations length width trim colors openings hatches steps stringer locations length relieves modeler having check dimension detail steel tape direct side front view cannot taken alternate method free-hand sketches dimensions As example plane being modeled differs drawing addition wheel pants side view overall dimension required duplication pants Another photo inside will show mounting method description methods will seem elementary experienced old-timers letters indicate need discuss steps scaling photos Control Surface Flutten Flutter can lead disaster necessarily restricted models alone 48 years ago flying recently hopped-up rebuilt Travel Air Mystery 5 Jimmy Doolittle exceeded pre vious speeds introduced severe case aileron flutter Before plane could slowed aileron depar ted taking sizeable portion wing Fortunately Jimmy survived diag nose ailments caused problem Travel Air friese-type ailerons over-balanced hinge line too far rearward relative leading edge fault may great conse quence model planes second affliction something quite familiar too much flexi bility torque tubes operated ailerons Aileron flutter can occur speed builds during maneuvers ground hear buzzing humming sound Good hinges may withstand first attack flutter recurrence will weaken undesireable results Flutter can induced number weaknesses such flexibility torque tubes rods Within aileron itself long soft enough twist easily flutter less likely occur aileron bellcrank near center rather end Reducing width can help scale appearance doesnt suffer too badly Soft linkages bellcranks leading servo may also mounted too flexibly can contribute flutter Sealing aileron gaps narrow tape stopping flow air through gap can sometimes help Surest cure reduce flexibility during construc tion using large torque tubes never less eter long tubes Although torque tubes seldom used sport-type planes quite common scale because no unsightly exter nal horns ailerons operated pushrods bellcranks reduce clearance pivots Resist temptation drill out bellcrank holes free operation bellcrank mounted too small pivot screw can also contribute have seen servos mounted usual rubber grommets could visibly shifted manually moving aileron models susceptible flutter will help know look trouble source Violent flutter can damage servo buzzing sound suddenly servo ceases function Can wing ailerons flutter has happened lightly built wing perfec tly safe slower speeds Let speed build reason whole wing can suddenly destroy itself Speed can increase inadvertently bottom loop elevator control relaxed too early during normal turn rudder drops nose sufficient elevator control Bill Winter tells seeing 90 span light-weight model cruising peacefully level very slight wind suddenly fluttering tearing off wing panel diagnosed effect covering tight enought Years ago flew stunt ships eight-ounce wings 35 engine tweaking lions tail got away because silk covering tightly doped Bill also tells rudder developed flutter such violence hinges torn right out plywood remembers extreme elevator flutter vibrated other servos senseless plane con tinued vertically ground cure tail surface flutter strong push-rods no play linkages firmly mounted servos Parts Catalog search drive mechanisms operate gun turrets canopies landing gears other gadgets catalogs Stock Drive Products has fed imagi nations have number catalogs two list thousands useful parts scale modelers Rack pinion drives straight-line motion listed brass steel lightweight nylon very small 106 Model Aviation I AT YOUR DEALER THE ONLY THREADED COUPLER WITH THE SLOT THAT HITS THE SPOT 0esOu~s roei,v Just simple slot takes guesswork out soldering wire coupler slot lets see sure solder has flowed around wire Sullivan 2/56 Threaded Brass Coupler Leave Marty Sullivan little things mean much s Sullivan touch Insist slot chamfer shoulder too BC 6/7 00 SMOOOTH LANDINGS 74 K Strong lightweight REALISTIC landing gears eliminate erratic vibra tion feature short fulcrum ground hugging ability Caster ac tion Adjustable pressure Easy customize Sizes fit wheels 1 3 AND NOW THERES FUELER WITh TRUE FILTER SYSTEM TOO Get double filtration perform ance Sullivan Crap Trap fuel up too Two different sized filters keep particles out tank Fueler comes complete 4 feet Sulli-Cone tubing 3 feet lesser quality tubing tubing WONT COLLAPSE defueling Only $250 P R 0 D U C T S N C 585 DAVISVILLE ROAD OW GROVE PA 19090 215 650-3900 sizes ideal operating features Pinions pinion wire helical gears worms worm gears molded miter gears various mate rials bevel gears spur gears ball bearings bores small milli meter 0469 just few ofthe items Handbook Stock Gears catalog SDP 75 $295 postpaid second catalog interest scale modelers lists belt chain drives list includes toothed timing belts polyure thane elastomer reinforced polyester cord sizes small 047 thick 125 wide range toothed pulleys aluminum fiberglass reinforced Lexan steel molded fiberglass Delrin match Also listed polyester cord flat belts pulleys V-belts round belts chain drives 218 page Handbook Small Belt Chain Drive catalog SDP 651 $195 postpaid address Stock Drive Products 55 South Denton Ave New Hyde Park NY 11040 Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafleld WI 5301& RC Soaring/Pruss continued page 27 dark blue trim color combo really set off rest Its always peeve scribe display type Toledo past sailplanes werent class selves regards finish detailing no pollution generator up front fact models well outlast couple flying seasons Im speaking others theres little reason sailplanes being show stoppers Hopefully Bates Pratt Corven Tiahrt have set pace Seen heard about Toledo Besides maroon-and-cream Monokote men tioned two new colors available gold burnt red Top Flite Models Inc 1901 N Narragansett Ave Chicago IL 60639 free Monokote sample 12-page catalog send 50 cents above address Cox Hobbies showed new Aquila Grande fiber glass fuselage Kit quality best tradition Lee Renaud wide range radios also displayed Call Cox action hotline 800 8543544 California 18004327277 write Cox Hobbies Inc 1505 E Warner Ave Santa Ana Ca 92702 Craft-Air Tom Williams showed Viking Tom pointed out comes choice rib sections modeler can purchase second other wing direct Craft-Air discount wing uses 11-percent flat-bottom airfoil other 12-percent semi-symmetrical wing Write Craft-Air Inc 20115 Nord hoff St Chatsworth CA 91311 Fab-Tek Inc showed new sport winch light-weight package thought body-building program pre requisite toting launching devices will allow use PLANS7 MAP range plans England largest compre hensive world Buy plans handbook find out yourself handbook contains full details of thousands plans prices plans available US agents listed handbooks Handbook 1 Aeiomodlling Handbook 2 MOdE Boats Cars Handbook 3 Model Engineering Handbook 4 Radio ControlAircraft model & Allied MAPPublicotions Ltd AvailableintheUSA Pnce *150 including postage Salee Office PO Box 35 BrIdge Street Hemputeed HorSe NM lEE HemelEngland July1979 107 SINGLE . $350 SET OF 3 $995