Radio Control Scale Bob & Dolly Wischer SCALE ELECTRICS An Electric Spit fire Mk la seen Toledo served notice can expect Electric Scale appear competitions 61-inwingspan Spitfire Keith Shaw fea tured retracts AFI Cobalt 25 geared motor Jomar SC-2 speed control distinctive difference between model others Toledo its weight mere 25 ounces batter ies Total weight ready fly 80 ounces present Electric Scale air planes judged along others may changing Electric Scale made its first appearance 1973 Nats Bob Boucher entered Fournier introduced us spectacle Scale silent flight Under ideal conditions Fournier could have quite competitive Unfor tunately Scale flying days 1973 Oshkosh Nats plagued strong gusty winds prolonged time needed Bobs climb maneuver position meant curtailment time needed complete full flight schedule Improvements motors drives control accessories will make Electrics attractive competition subjects Fournier chosen ideal subject Electric Scale Harry Apoian writing Electric Aeromodeing Association newsletter has say about Electric Scale Scale models unique look fly like full-size airplanes challenge lies degree difficulty achieve goals return sense accomplishment use elec tric power Scaleness horizon may expanded include model types up now considered im practical reciprocating engines example pushers multi-engine planes shaft-driven props lighter-than-air geared props self-starting air restarts possible practical promote Electric Scale Electric Aeromodeling Association have emphasize positive aspects ex ploit applications electric power would advantage What best course take Should com pete non-Electric planes regular AMA contests As newly-formed spe cial interest group within AMA position dictate requirements advantage Lets generate Scale rules Electric power need new ideas Scale competition need new categories AMA records 46 Model Aviation An OS Wankel rotary engine powers 6-lb Sopwlth 1 -Strutter displayed Toledo Frank Hoffer Finish Aero Gloss over Coverite Strutter rare WW airDianes easily balanced model formbecause lana noe& Phil Nlggs Precision Scale Douglas AD-6 Skyraider cowl hatch open partially expos ma scale dummy engine Somewhere hidden beneath dummy 05 61 Note oidive brakes shownI Roger Vanbuskirk detalied Vought F4U-1A Corsair panel lines weathering Model %-scaie spans 61 weighs 9 lb uses OS 90 FSR engine Scale RC Scale Free Flight Scale Indoor AMA-EAA will opportunity start fresh dynamic enough advance state art Please let know thoughts ideas new organization Lets improve capabilities enhance enjoyment great hobby Lets hear Harry Apoian 27704 Saddle Road Rollins Hills CA 90274 information subject designing Scale models electric power comes Roland Boucher Leisure Electronics Roland has say about design properly designed con structed Scale model will perform manner similar full-scale airplane will take off land same num ber airplane lengths real plane will climb same angle will snap spin maneuvers scalelike manner plane will also fly Scale speeds allowing same types vertical maneuvers real plane can accomplished follow ing few simple rules first rule keep density weight per cubic foot airplane constant air model flying same air real plane flying makes sense keep plane same density Lets see works out reduce model size scale factor 5 wing span will reduce 1/S real plane density constant will reduce l/S Formula examples scale fac tors number common scales given end article has remarkable effect wing loadingit reduces directly scale factor example A-scale ship would have scale factor 4 would have / wing loading real plane scale speed model will fly propor tional square root its wing load ing A-scale example will stall glide speed full-size plane power required fly model directly proportional its speed weight scale power required would Continued page 135 Brand New Second Edition Consumers Guide RC Aircraft Products complete source Radio Control product information ever published Now Including Boats Cars $95plus $165 UPS shipping charges Name ____________________________________________________________[v32][b2083259811100]] Adireee Send $860 includes shipping UPS APO foreign surface maiI $1246 foreign air maii consumers Guide 150 Ott Street Harrlsonburg VA 22801 November 1984 47 colorful glossy Pitta built Tim Lamp Pilot kit Its covered Monoote Formula U paint trim Wingspan 42 engine 05 40 valuable tool experienced hobbyist must beginner Model Magic Filler Quick setting Light weight Non shrinking Fillets Gap filling Ding repair See dealer urst Model Magic Products Model Magic Products PO Box 7784St Paul Minn 55119 715 425-1397 $595 Retail 8 fI oz Adhesion Balsa Foam Fiberglass Strength Flexing Spreading Fuel Resistance Sanding Hardness Finishing Shelf Life Tint Acceptance Water Resistance Comparison Chart Model Magic Excellent Product X Very Poor a Good As medium balsa As Hard Balsa Any fish/covering till used up Excellent Soft balsa Soft balsa ail Spoils i 5lmo Very Poor Test methods arid data avalable request care enough fill very best uisast Model Magc Fler Circus Magic FiNer Nats start Id love cant Nats RC Pattern coverage will handled Steve McCann Pete Callas members National Society Radio Controlled Aerobatics Pete Steve co-District 7 Vice Presidents NSRCA jointly author District 7 submission K-Factor newsletter NSRCA always look forward K-Factor articles know real treat Nats coverage Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32S48 RO ScalelWlschers Continued page 47 reduced real planes power 1/S3 weight factor l/V speed factor Using Y-scale 65 hp Piper Cub example power re quired would 65 p 65 hp Continental engine turned 72-in-diameter prop 2400 rpm 18-in scale-size prop used must turn faster square root scale fac tor 2400 x -VT rpm example A-scale plane given keep math easy results however 108-in-span plane weighing 12 lbsnot exactly schoolyard flier Lets see what happens prac tical scale factor 1% J-3 Cub chosen choice scale results 61-in-span model weighing 37 oz powered 08 hp motor turn ing l05-in-diameter prop 6285 rpm Today modern 05 geared electric flight systems will fit requirement quite well Table gives scaling factors model Surprisingly 05 fits almost ex actly its weight nearly proportion real power plant 65 hp Conti nental engine weighs about 200 lbs 15 gallons fuel aboard weighs another 90 lbs total 290 lbsor 38o Cubs flying weight 05 flight system weighs about 17 ounces 42o gross model weight bad 05 electric dont have calculator square roots Table II gives scaling factors four popular scales Table wingspan Area weight Speed Power Prop RPM J-3 Cub Scale 1 86 FullSlze Scale Factor Model 353 ft1/S 661 184 sq ft uS 563 sq 750 lbuS 237 ounces 80mph 1/V 1/262 30mph 65 hp 1/S5 x 1/V 1/844 0077 hp 72 in1/5 6105 2400 cruiseV 262 6285 Table 11 ScalIng Factore Consanoely Used 5cale inches11A23 Fractionsi Scale 1/8 1/686 1/6 1/4 Ares uS1/641/471/361/16 weight uS 1/512 1/322 1/216 1/64 Speed 1/Vs 1/283 1/262 1/245 1/2 Power 1/5 x 1/V1/1448 1/844 1/529 1/128 Prop Diameter1/5 1/81/686 1/61/4 Prop speed Vi28326224520 Examples Scale models suitable Leisure LT-50 gear motors Leisure LT-50 *6003A 251 geared 7 call Heath Parasol 02 Span313 ft63in Area weight Speed Power Prop RPM Tayloreraft Span Area weight Speed Power Prop RPM 135 sq ft 650 lb 62 mph 25 hp 55 dia 2800 LeIsure LT-5O *603 31 geared 7 call 0 1 36 ft 184 sq ft 900 lbs 96 mph 65 hp 72 2400 Leisure LT-50 *603B 381 geared 7 cell CurtIs RobIn 0 11 ft Span41 ft Area223 sq ft weight1800 lb Speed100 mph Power90 lip Prop104 RPM1400 540 sq us 44oz 25 mph 005 hp 9 6860 63 us 563 sq us 44 oz 37 mph 008 hp 105 in 6288 615 in 502 sq us 56 oz 35 mph 0062 hp 13 3959 Roland Boucher has come up some handy numbers lead us proper scaling procedure avoid head aches come building too large small also keep model weight power within ballpark Electric Scale now flourishing type information needed fact Continued page 138 November1984 135 tnen wriie caii New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength Sands and carves like basswood! 6 fI oz $895 See dealer IrsI write cal NhJ Model Magic Pociicts Inc =P0 Box 19784 SIPaut MN 55119 715425-1391 TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4 CYCLE 7590 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 NEWNEWNEW 1/5 SCALE 4/STROKE ENGINES WACO HKS-7 74812-4STR ENG GREAT LAKES TRAINER 6490-4STR ENG GREAT LAKES SPECIAL 6490-4STR ENG PLANS$28 EG COWLS$23ECONO-PAC$45 ALSOALSOALSO 1/4 GIANT SCALE BIG ENGINES WACO HKS-7 997525-4 ENG GREAT LAKES SPECIAL 802-25 ENG GREAT LAKES TRAINER 802 ENG PLANS 527 EG COWLS$25FGPANTS$25 ECONO-PAC except TRAINER MOREMOREMORE FARMAN MOUSTIGUE 1/4 SCALE80/40 4/STR NEW NEW NEW 2 ANTIQUE RIG MODELS BILL WINTERS ROOKIE 7240-60/4 STR DEBOLTS LIVE WIRE TRAINER 25% 60 SPAN 21-40 4/5TH ENG PLANS e three 0 orders PP CONT USA NYS Res 8% Tax ASE Brochure NORM ROSENSTOCK 94 CEDAR DRIVE PLAINVIEW NY 11803 PHONE 919442-4939 w wfwf 9499-8975 BOX 2498-MALA MESA CA 92041 caleIWiscers Continued page 135 also applies Scale models Glow- gas-powered models permit us luxury building heavier aircraft getting away wonder will first successfully build fly quarter-scale electric Maybe its already done Unnecessary Scale accidents month before Scale team depart World Championships Paris Team Manager Dolly Wischer received shocking news models lost accident Cliff Tacie prac ticing Spezio TuHoler Another flier aborted takeoff ran model pit area its propeller chewed Cliffs leg leg repair re quired 40 ical stitches Unfor tunately Cliffs Spezio air occured control lost airplane several thousand hours labor its construction refine ment totaled Its performance much improved after changing 60 engine new four-stroke 90 airplane did damage type can assembled few weeks average builder point storyand fly valuable Scale model defensive ly parked pit area its vulnerable have personal ex perience least three occasions damage occured pits ready protect valuable investment time effort money Dont goaded flying other airplanes just prove fearlessness someone taunts expression chicken heard tell person build equal value put sky game combat course dont live fear strong sense apprehension about mix ing valuable airplane swarm quickies will help preserve model have heard Scale airplanes called closet queens because assumed seldom flown due fear damage pilot error other reasons name-callers have long since gone back golf whatever else ing models have preserved continue fly true Scale modeler has long-term commitment sport hobby isnt transient looking stant gratification moves other endeavors fancy dictates thrill controlling missile dimin ished have stopped counting nearmisses air midair collision 28 years RC has enough Defensive flying promote preserva tion model isnt entirely matter protecting against other guy Some accidents occur result performance beyond models capabili ty fly trainers through maneuvers expect same Scale model Tailspins near ground claim some airplanes could have survived bit air underneath time Some spin recoveries delayed intentionally others need decisive action affect response particularly WW II air craft Avoiding inadvertent spin just matter maintaining flying speed way down landing too uses downelevator control Scale flying spin recovery right time apply it happens near ground use down-eleva tor gather speed follow gen tle up-elevator add power prevent re-entry secondary spin have used technique save model course possible because sufficient altitude initially model appeared well its way destruction Steep turns near ground also invitation disaster because too much wings lift being used change direction leaves too little lift supporting models weight now increased centrifugal force add ed gravity snap roll ground actually one-half-turn spin Paint coverage Paint seems have less covering power today compared what normal earlier days modeling Dope materials seems have changed After several coats framework remains visible sil houette through covering held up bright light Experts tell us result lead being banished paint manufacture Apparently term lead sled apt description earlier heavily-finished Scale models An opaque finish still possible penalty excessive weight build-up using coat aluminum paint just beneath final color coats example doped finish mix aluminum powder last coat clear dope has additional advan tage leveling out color differences substrate An amazingly small amount color needed cover aluminum uniform coating heavy spray coator two lighter applica tionswill suffice prefer run receiver antenna through fuselage interior have stories hazardous fuselage sprayed aluminum paint experience indicates no problems signal loss alumi num coats used simulate metal fuselage Bob Doily Wischer S-221 Lapham Peak Rd Delafield WI 53018 Safe Flying No Accident 138 Model Aviation --7 4 tOe run rnrt inrunmniuno AYTON FIUDIRD 40 2310 RAVEN WOOD D PRAIRIE TEXAS 75050 PLAN SET SKIPPED POST PAID IN U 5 WE NOW HAVE COMPLETE LINE OF BROWN TELCO DAVIS CO-2 ENGINES INCLUDING SPARE PARTS SERVICE BROWNTEL CO A-23 PEANUT$3995STANDARD TELCO$3499 CAMPUS BEE $3995 TURBO 3800$3299 CAMPUS TWIN 995 TURBO 9000$3995 SODA CHARGER .. $1299 D4 MIS- COX 02 CONVERSION TO CO-2$3995 NEW CATALO/ Ne 25- $150
Edition: Model Aviation - 1984/11
Page Numbers: 46, 47, 135, 138
Radio Control Scale Bob & Dolly Wischer SCALE ELECTRICS An Electric Spit fire Mk la seen Toledo served notice can expect Electric Scale appear competitions 61-inwingspan Spitfire Keith Shaw fea tured retracts AFI Cobalt 25 geared motor Jomar SC-2 speed control distinctive difference between model others Toledo its weight mere 25 ounces batter ies Total weight ready fly 80 ounces present Electric Scale air planes judged along others may changing Electric Scale made its first appearance 1973 Nats Bob Boucher entered Fournier introduced us spectacle Scale silent flight Under ideal conditions Fournier could have quite competitive Unfor tunately Scale flying days 1973 Oshkosh Nats plagued strong gusty winds prolonged time needed Bobs climb maneuver position meant curtailment time needed complete full flight schedule Improvements motors drives control accessories will make Electrics attractive competition subjects Fournier chosen ideal subject Electric Scale Harry Apoian writing Electric Aeromodeing Association newsletter has say about Electric Scale Scale models unique look fly like full-size airplanes challenge lies degree difficulty achieve goals return sense accomplishment use elec tric power Scaleness horizon may expanded include model types up now considered im practical reciprocating engines example pushers multi-engine planes shaft-driven props lighter-than-air geared props self-starting air restarts possible practical promote Electric Scale Electric Aeromodeling Association have emphasize positive aspects ex ploit applications electric power would advantage What best course take Should com pete non-Electric planes regular AMA contests As newly-formed spe cial interest group within AMA position dictate requirements advantage Lets generate Scale rules Electric power need new ideas Scale competition need new categories AMA records 46 Model Aviation An OS Wankel rotary engine powers 6-lb Sopwlth 1 -Strutter displayed Toledo Frank Hoffer Finish Aero Gloss over Coverite Strutter rare WW airDianes easily balanced model formbecause lana noe& Phil Nlggs Precision Scale Douglas AD-6 Skyraider cowl hatch open partially expos ma scale dummy engine Somewhere hidden beneath dummy 05 61 Note oidive brakes shownI Roger Vanbuskirk detalied Vought F4U-1A Corsair panel lines weathering Model %-scaie spans 61 weighs 9 lb uses OS 90 FSR engine Scale RC Scale Free Flight Scale Indoor AMA-EAA will opportunity start fresh dynamic enough advance state art Please let know thoughts ideas new organization Lets improve capabilities enhance enjoyment great hobby Lets hear Harry Apoian 27704 Saddle Road Rollins Hills CA 90274 information subject designing Scale models electric power comes Roland Boucher Leisure Electronics Roland has say about design properly designed con structed Scale model will perform manner similar full-scale airplane will take off land same num ber airplane lengths real plane will climb same angle will snap spin maneuvers scalelike manner plane will also fly Scale speeds allowing same types vertical maneuvers real plane can accomplished follow ing few simple rules first rule keep density weight per cubic foot airplane constant air model flying same air real plane flying makes sense keep plane same density Lets see works out reduce model size scale factor 5 wing span will reduce 1/S real plane density constant will reduce l/S Formula examples scale fac tors number common scales given end article has remarkable effect wing loadingit reduces directly scale factor example A-scale ship would have scale factor 4 would have / wing loading real plane scale speed model will fly propor tional square root its wing load ing A-scale example will stall glide speed full-size plane power required fly model directly proportional its speed weight scale power required would Continued page 135 Brand New Second Edition Consumers Guide RC Aircraft Products complete source Radio Control product information ever published Now Including Boats Cars $95plus $165 UPS shipping charges Name ____________________________________________________________[v32][b2083259811100]] Adireee Send $860 includes shipping UPS APO foreign surface maiI $1246 foreign air maii consumers Guide 150 Ott Street Harrlsonburg VA 22801 November 1984 47 colorful glossy Pitta built Tim Lamp Pilot kit Its covered Monoote Formula U paint trim Wingspan 42 engine 05 40 valuable tool experienced hobbyist must beginner Model Magic Filler Quick setting Light weight Non shrinking Fillets Gap filling Ding repair See dealer urst Model Magic Products Model Magic Products PO Box 7784St Paul Minn 55119 715 425-1397 $595 Retail 8 fI oz Adhesion Balsa Foam Fiberglass Strength Flexing Spreading Fuel Resistance Sanding Hardness Finishing Shelf Life Tint Acceptance Water Resistance Comparison Chart Model Magic Excellent Product X Very Poor a Good As medium balsa As Hard Balsa Any fish/covering till used up Excellent Soft balsa Soft balsa ail Spoils i 5lmo Very Poor Test methods arid data avalable request care enough fill very best uisast Model Magc Fler Circus Magic FiNer Nats start Id love cant Nats RC Pattern coverage will handled Steve McCann Pete Callas members National Society Radio Controlled Aerobatics Pete Steve co-District 7 Vice Presidents NSRCA jointly author District 7 submission K-Factor newsletter NSRCA always look forward K-Factor articles know real treat Nats coverage Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32S48 RO ScalelWlschers Continued page 47 reduced real planes power 1/S3 weight factor l/V speed factor Using Y-scale 65 hp Piper Cub example power re quired would 65 p 65 hp Continental engine turned 72-in-diameter prop 2400 rpm 18-in scale-size prop used must turn faster square root scale fac tor 2400 x -VT rpm example A-scale plane given keep math easy results however 108-in-span plane weighing 12 lbsnot exactly schoolyard flier Lets see what happens prac tical scale factor 1% J-3 Cub chosen choice scale results 61-in-span model weighing 37 oz powered 08 hp motor turn ing l05-in-diameter prop 6285 rpm Today modern 05 geared electric flight systems will fit requirement quite well Table gives scaling factors model Surprisingly 05 fits almost ex actly its weight nearly proportion real power plant 65 hp Conti nental engine weighs about 200 lbs 15 gallons fuel aboard weighs another 90 lbs total 290 lbsor 38o Cubs flying weight 05 flight system weighs about 17 ounces 42o gross model weight bad 05 electric dont have calculator square roots Table II gives scaling factors four popular scales Table wingspan Area weight Speed Power Prop RPM J-3 Cub Scale 1 86 FullSlze Scale Factor Model 353 ft1/S 661 184 sq ft uS 563 sq 750 lbuS 237 ounces 80mph 1/V 1/262 30mph 65 hp 1/S5 x 1/V 1/844 0077 hp 72 in1/5 6105 2400 cruiseV 262 6285 Table 11 ScalIng Factore Consanoely Used 5cale inches11A23 Fractionsi Scale 1/8 1/686 1/6 1/4 Ares uS1/641/471/361/16 weight uS 1/512 1/322 1/216 1/64 Speed 1/Vs 1/283 1/262 1/245 1/2 Power 1/5 x 1/V1/1448 1/844 1/529 1/128 Prop Diameter1/5 1/81/686 1/61/4 Prop speed Vi28326224520 Examples Scale models suitable Leisure LT-50 gear motors Leisure LT-50 *6003A 251 geared 7 call Heath Parasol 02 Span313 ft63in Area weight Speed Power Prop RPM Tayloreraft Span Area weight Speed Power Prop RPM 135 sq ft 650 lb 62 mph 25 hp 55 dia 2800 LeIsure LT-5O *603 31 geared 7 call 0 1 36 ft 184 sq ft 900 lbs 96 mph 65 hp 72 2400 Leisure LT-50 *603B 381 geared 7 cell CurtIs RobIn 0 11 ft Span41 ft Area223 sq ft weight1800 lb Speed100 mph Power90 lip Prop104 RPM1400 540 sq us 44oz 25 mph 005 hp 9 6860 63 us 563 sq us 44 oz 37 mph 008 hp 105 in 6288 615 in 502 sq us 56 oz 35 mph 0062 hp 13 3959 Roland Boucher has come up some handy numbers lead us proper scaling procedure avoid head aches come building too large small also keep model weight power within ballpark Electric Scale now flourishing type information needed fact Continued page 138 November1984 135 tnen wriie caii New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength Sands and carves like basswood! 6 fI oz $895 See dealer IrsI write cal NhJ Model Magic Pociicts Inc =P0 Box 19784 SIPaut MN 55119 715425-1391 TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4 CYCLE 7590 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 NEWNEWNEW 1/5 SCALE 4/STROKE ENGINES WACO HKS-7 74812-4STR ENG GREAT LAKES TRAINER 6490-4STR ENG GREAT LAKES SPECIAL 6490-4STR ENG PLANS$28 EG COWLS$23ECONO-PAC$45 ALSOALSOALSO 1/4 GIANT SCALE BIG ENGINES WACO HKS-7 997525-4 ENG GREAT LAKES SPECIAL 802-25 ENG GREAT LAKES TRAINER 802 ENG PLANS 527 EG COWLS$25FGPANTS$25 ECONO-PAC except TRAINER MOREMOREMORE FARMAN MOUSTIGUE 1/4 SCALE80/40 4/STR NEW NEW NEW 2 ANTIQUE RIG MODELS BILL WINTERS ROOKIE 7240-60/4 STR DEBOLTS LIVE WIRE TRAINER 25% 60 SPAN 21-40 4/5TH ENG PLANS e three 0 orders PP CONT USA NYS Res 8% Tax ASE Brochure NORM ROSENSTOCK 94 CEDAR DRIVE PLAINVIEW NY 11803 PHONE 919442-4939 w wfwf 9499-8975 BOX 2498-MALA MESA CA 92041 caleIWiscers Continued page 135 also applies Scale models Glow- gas-powered models permit us luxury building heavier aircraft getting away wonder will first successfully build fly quarter-scale electric Maybe its already done Unnecessary Scale accidents month before Scale team depart World Championships Paris Team Manager Dolly Wischer received shocking news models lost accident Cliff Tacie prac ticing Spezio TuHoler Another flier aborted takeoff ran model pit area its propeller chewed Cliffs leg leg repair re quired 40 ical stitches Unfor tunately Cliffs Spezio air occured control lost airplane several thousand hours labor its construction refine ment totaled Its performance much improved after changing 60 engine new four-stroke 90 airplane did damage type can assembled few weeks average builder point storyand fly valuable Scale model defensive ly parked pit area its vulnerable have personal ex perience least three occasions damage occured pits ready protect valuable investment time effort money Dont goaded flying other airplanes just prove fearlessness someone taunts expression chicken heard tell person build equal value put sky game combat course dont live fear strong sense apprehension about mix ing valuable airplane swarm quickies will help preserve model have heard Scale airplanes called closet queens because assumed seldom flown due fear damage pilot error other reasons name-callers have long since gone back golf whatever else ing models have preserved continue fly true Scale modeler has long-term commitment sport hobby isnt transient looking stant gratification moves other endeavors fancy dictates thrill controlling missile dimin ished have stopped counting nearmisses air midair collision 28 years RC has enough Defensive flying promote preserva tion model isnt entirely matter protecting against other guy Some accidents occur result performance beyond models capabili ty fly trainers through maneuvers expect same Scale model Tailspins near ground claim some airplanes could have survived bit air underneath time Some spin recoveries delayed intentionally others need decisive action affect response particularly WW II air craft Avoiding inadvertent spin just matter maintaining flying speed way down landing too uses downelevator control Scale flying spin recovery right time apply it happens near ground use down-eleva tor gather speed follow gen tle up-elevator add power prevent re-entry secondary spin have used technique save model course possible because sufficient altitude initially model appeared well its way destruction Steep turns near ground also invitation disaster because too much wings lift being used change direction leaves too little lift supporting models weight now increased centrifugal force add ed gravity snap roll ground actually one-half-turn spin Paint coverage Paint seems have less covering power today compared what normal earlier days modeling Dope materials seems have changed After several coats framework remains visible sil houette through covering held up bright light Experts tell us result lead being banished paint manufacture Apparently term lead sled apt description earlier heavily-finished Scale models An opaque finish still possible penalty excessive weight build-up using coat aluminum paint just beneath final color coats example doped finish mix aluminum powder last coat clear dope has additional advan tage leveling out color differences substrate An amazingly small amount color needed cover aluminum uniform coating heavy spray coator two lighter applica tionswill suffice prefer run receiver antenna through fuselage interior have stories hazardous fuselage sprayed aluminum paint experience indicates no problems signal loss alumi num coats used simulate metal fuselage Bob Doily Wischer S-221 Lapham Peak Rd Delafield WI 53018 Safe Flying No Accident 138 Model Aviation --7 4 tOe run rnrt inrunmniuno AYTON FIUDIRD 40 2310 RAVEN WOOD D PRAIRIE TEXAS 75050 PLAN SET SKIPPED POST PAID IN U 5 WE NOW HAVE COMPLETE LINE OF BROWN TELCO DAVIS CO-2 ENGINES INCLUDING SPARE PARTS SERVICE BROWNTEL CO A-23 PEANUT$3995STANDARD TELCO$3499 CAMPUS BEE $3995 TURBO 3800$3299 CAMPUS TWIN 995 TURBO 9000$3995 SODA CHARGER .. $1299 D4 MIS- COX 02 CONVERSION TO CO-2$3995 NEW CATALO/ Ne 25- $150
Edition: Model Aviation - 1984/11
Page Numbers: 46, 47, 135, 138
Radio Control Scale Bob & Dolly Wischer SCALE ELECTRICS An Electric Spit fire Mk la seen Toledo served notice can expect Electric Scale appear competitions 61-inwingspan Spitfire Keith Shaw fea tured retracts AFI Cobalt 25 geared motor Jomar SC-2 speed control distinctive difference between model others Toledo its weight mere 25 ounces batter ies Total weight ready fly 80 ounces present Electric Scale air planes judged along others may changing Electric Scale made its first appearance 1973 Nats Bob Boucher entered Fournier introduced us spectacle Scale silent flight Under ideal conditions Fournier could have quite competitive Unfor tunately Scale flying days 1973 Oshkosh Nats plagued strong gusty winds prolonged time needed Bobs climb maneuver position meant curtailment time needed complete full flight schedule Improvements motors drives control accessories will make Electrics attractive competition subjects Fournier chosen ideal subject Electric Scale Harry Apoian writing Electric Aeromodeing Association newsletter has say about Electric Scale Scale models unique look fly like full-size airplanes challenge lies degree difficulty achieve goals return sense accomplishment use elec tric power Scaleness horizon may expanded include model types up now considered im practical reciprocating engines example pushers multi-engine planes shaft-driven props lighter-than-air geared props self-starting air restarts possible practical promote Electric Scale Electric Aeromodeling Association have emphasize positive aspects ex ploit applications electric power would advantage What best course take Should com pete non-Electric planes regular AMA contests As newly-formed spe cial interest group within AMA position dictate requirements advantage Lets generate Scale rules Electric power need new ideas Scale competition need new categories AMA records 46 Model Aviation An OS Wankel rotary engine powers 6-lb Sopwlth 1 -Strutter displayed Toledo Frank Hoffer Finish Aero Gloss over Coverite Strutter rare WW airDianes easily balanced model formbecause lana noe& Phil Nlggs Precision Scale Douglas AD-6 Skyraider cowl hatch open partially expos ma scale dummy engine Somewhere hidden beneath dummy 05 61 Note oidive brakes shownI Roger Vanbuskirk detalied Vought F4U-1A Corsair panel lines weathering Model %-scaie spans 61 weighs 9 lb uses OS 90 FSR engine Scale RC Scale Free Flight Scale Indoor AMA-EAA will opportunity start fresh dynamic enough advance state art Please let know thoughts ideas new organization Lets improve capabilities enhance enjoyment great hobby Lets hear Harry Apoian 27704 Saddle Road Rollins Hills CA 90274 information subject designing Scale models electric power comes Roland Boucher Leisure Electronics Roland has say about design properly designed con structed Scale model will perform manner similar full-scale airplane will take off land same num ber airplane lengths real plane will climb same angle will snap spin maneuvers scalelike manner plane will also fly Scale speeds allowing same types vertical maneuvers real plane can accomplished follow ing few simple rules first rule keep density weight per cubic foot airplane constant air model flying same air real plane flying makes sense keep plane same density Lets see works out reduce model size scale factor 5 wing span will reduce 1/S real plane density constant will reduce l/S Formula examples scale fac tors number common scales given end article has remarkable effect wing loadingit reduces directly scale factor example A-scale ship would have scale factor 4 would have / wing loading real plane scale speed model will fly propor tional square root its wing load ing A-scale example will stall glide speed full-size plane power required fly model directly proportional its speed weight scale power required would Continued page 135 Brand New Second Edition Consumers Guide RC Aircraft Products complete source Radio Control product information ever published Now Including Boats Cars $95plus $165 UPS shipping charges Name ____________________________________________________________[v32][b2083259811100]] Adireee Send $860 includes shipping UPS APO foreign surface maiI $1246 foreign air maii consumers Guide 150 Ott Street Harrlsonburg VA 22801 November 1984 47 colorful glossy Pitta built Tim Lamp Pilot kit Its covered Monoote Formula U paint trim Wingspan 42 engine 05 40 valuable tool experienced hobbyist must beginner Model Magic Filler Quick setting Light weight Non shrinking Fillets Gap filling Ding repair See dealer urst Model Magic Products Model Magic Products PO Box 7784St Paul Minn 55119 715 425-1397 $595 Retail 8 fI oz Adhesion Balsa Foam Fiberglass Strength Flexing Spreading Fuel Resistance Sanding Hardness Finishing Shelf Life Tint Acceptance Water Resistance Comparison Chart Model Magic Excellent Product X Very Poor a Good As medium balsa As Hard Balsa Any fish/covering till used up Excellent Soft balsa Soft balsa ail Spoils i 5lmo Very Poor Test methods arid data avalable request care enough fill very best uisast Model Magc Fler Circus Magic FiNer Nats start Id love cant Nats RC Pattern coverage will handled Steve McCann Pete Callas members National Society Radio Controlled Aerobatics Pete Steve co-District 7 Vice Presidents NSRCA jointly author District 7 submission K-Factor newsletter NSRCA always look forward K-Factor articles know real treat Nats coverage Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32S48 RO ScalelWlschers Continued page 47 reduced real planes power 1/S3 weight factor l/V speed factor Using Y-scale 65 hp Piper Cub example power re quired would 65 p 65 hp Continental engine turned 72-in-diameter prop 2400 rpm 18-in scale-size prop used must turn faster square root scale fac tor 2400 x -VT rpm example A-scale plane given keep math easy results however 108-in-span plane weighing 12 lbsnot exactly schoolyard flier Lets see what happens prac tical scale factor 1% J-3 Cub chosen choice scale results 61-in-span model weighing 37 oz powered 08 hp motor turn ing l05-in-diameter prop 6285 rpm Today modern 05 geared electric flight systems will fit requirement quite well Table gives scaling factors model Surprisingly 05 fits almost ex actly its weight nearly proportion real power plant 65 hp Conti nental engine weighs about 200 lbs 15 gallons fuel aboard weighs another 90 lbs total 290 lbsor 38o Cubs flying weight 05 flight system weighs about 17 ounces 42o gross model weight bad 05 electric dont have calculator square roots Table II gives scaling factors four popular scales Table wingspan Area weight Speed Power Prop RPM J-3 Cub Scale 1 86 FullSlze Scale Factor Model 353 ft1/S 661 184 sq ft uS 563 sq 750 lbuS 237 ounces 80mph 1/V 1/262 30mph 65 hp 1/S5 x 1/V 1/844 0077 hp 72 in1/5 6105 2400 cruiseV 262 6285 Table 11 ScalIng Factore Consanoely Used 5cale inches11A23 Fractionsi Scale 1/8 1/686 1/6 1/4 Ares uS1/641/471/361/16 weight uS 1/512 1/322 1/216 1/64 Speed 1/Vs 1/283 1/262 1/245 1/2 Power 1/5 x 1/V1/1448 1/844 1/529 1/128 Prop Diameter1/5 1/81/686 1/61/4 Prop speed Vi28326224520 Examples Scale models suitable Leisure LT-50 gear motors Leisure LT-50 *6003A 251 geared 7 call Heath Parasol 02 Span313 ft63in Area weight Speed Power Prop RPM Tayloreraft Span Area weight Speed Power Prop RPM 135 sq ft 650 lb 62 mph 25 hp 55 dia 2800 LeIsure LT-5O *603 31 geared 7 call 0 1 36 ft 184 sq ft 900 lbs 96 mph 65 hp 72 2400 Leisure LT-50 *603B 381 geared 7 cell CurtIs RobIn 0 11 ft Span41 ft Area223 sq ft weight1800 lb Speed100 mph Power90 lip Prop104 RPM1400 540 sq us 44oz 25 mph 005 hp 9 6860 63 us 563 sq us 44 oz 37 mph 008 hp 105 in 6288 615 in 502 sq us 56 oz 35 mph 0062 hp 13 3959 Roland Boucher has come up some handy numbers lead us proper scaling procedure avoid head aches come building too large small also keep model weight power within ballpark Electric Scale now flourishing type information needed fact Continued page 138 November1984 135 tnen wriie caii New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength Sands and carves like basswood! 6 fI oz $895 See dealer IrsI write cal NhJ Model Magic Pociicts Inc =P0 Box 19784 SIPaut MN 55119 715425-1391 TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4 CYCLE 7590 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 NEWNEWNEW 1/5 SCALE 4/STROKE ENGINES WACO HKS-7 74812-4STR ENG GREAT LAKES TRAINER 6490-4STR ENG GREAT LAKES SPECIAL 6490-4STR ENG PLANS$28 EG COWLS$23ECONO-PAC$45 ALSOALSOALSO 1/4 GIANT SCALE BIG ENGINES WACO HKS-7 997525-4 ENG GREAT LAKES SPECIAL 802-25 ENG GREAT LAKES TRAINER 802 ENG PLANS 527 EG COWLS$25FGPANTS$25 ECONO-PAC except TRAINER MOREMOREMORE FARMAN MOUSTIGUE 1/4 SCALE80/40 4/STR NEW NEW NEW 2 ANTIQUE RIG MODELS BILL WINTERS ROOKIE 7240-60/4 STR DEBOLTS LIVE WIRE TRAINER 25% 60 SPAN 21-40 4/5TH ENG PLANS e three 0 orders PP CONT USA NYS Res 8% Tax ASE Brochure NORM ROSENSTOCK 94 CEDAR DRIVE PLAINVIEW NY 11803 PHONE 919442-4939 w wfwf 9499-8975 BOX 2498-MALA MESA CA 92041 caleIWiscers Continued page 135 also applies Scale models Glow- gas-powered models permit us luxury building heavier aircraft getting away wonder will first successfully build fly quarter-scale electric Maybe its already done Unnecessary Scale accidents month before Scale team depart World Championships Paris Team Manager Dolly Wischer received shocking news models lost accident Cliff Tacie prac ticing Spezio TuHoler Another flier aborted takeoff ran model pit area its propeller chewed Cliffs leg leg repair re quired 40 ical stitches Unfor tunately Cliffs Spezio air occured control lost airplane several thousand hours labor its construction refine ment totaled Its performance much improved after changing 60 engine new four-stroke 90 airplane did damage type can assembled few weeks average builder point storyand fly valuable Scale model defensive ly parked pit area its vulnerable have personal ex perience least three occasions damage occured pits ready protect valuable investment time effort money Dont goaded flying other airplanes just prove fearlessness someone taunts expression chicken heard tell person build equal value put sky game combat course dont live fear strong sense apprehension about mix ing valuable airplane swarm quickies will help preserve model have heard Scale airplanes called closet queens because assumed seldom flown due fear damage pilot error other reasons name-callers have long since gone back golf whatever else ing models have preserved continue fly true Scale modeler has long-term commitment sport hobby isnt transient looking stant gratification moves other endeavors fancy dictates thrill controlling missile dimin ished have stopped counting nearmisses air midair collision 28 years RC has enough Defensive flying promote preserva tion model isnt entirely matter protecting against other guy Some accidents occur result performance beyond models capabili ty fly trainers through maneuvers expect same Scale model Tailspins near ground claim some airplanes could have survived bit air underneath time Some spin recoveries delayed intentionally others need decisive action affect response particularly WW II air craft Avoiding inadvertent spin just matter maintaining flying speed way down landing too uses downelevator control Scale flying spin recovery right time apply it happens near ground use down-eleva tor gather speed follow gen tle up-elevator add power prevent re-entry secondary spin have used technique save model course possible because sufficient altitude initially model appeared well its way destruction Steep turns near ground also invitation disaster because too much wings lift being used change direction leaves too little lift supporting models weight now increased centrifugal force add ed gravity snap roll ground actually one-half-turn spin Paint coverage Paint seems have less covering power today compared what normal earlier days modeling Dope materials seems have changed After several coats framework remains visible sil houette through covering held up bright light Experts tell us result lead being banished paint manufacture Apparently term lead sled apt description earlier heavily-finished Scale models An opaque finish still possible penalty excessive weight build-up using coat aluminum paint just beneath final color coats example doped finish mix aluminum powder last coat clear dope has additional advan tage leveling out color differences substrate An amazingly small amount color needed cover aluminum uniform coating heavy spray coator two lighter applica tionswill suffice prefer run receiver antenna through fuselage interior have stories hazardous fuselage sprayed aluminum paint experience indicates no problems signal loss alumi num coats used simulate metal fuselage Bob Doily Wischer S-221 Lapham Peak Rd Delafield WI 53018 Safe Flying No Accident 138 Model Aviation --7 4 tOe run rnrt inrunmniuno AYTON FIUDIRD 40 2310 RAVEN WOOD D PRAIRIE TEXAS 75050 PLAN SET SKIPPED POST PAID IN U 5 WE NOW HAVE COMPLETE LINE OF BROWN TELCO DAVIS CO-2 ENGINES INCLUDING SPARE PARTS SERVICE BROWNTEL CO A-23 PEANUT$3995STANDARD TELCO$3499 CAMPUS BEE $3995 TURBO 3800$3299 CAMPUS TWIN 995 TURBO 9000$3995 SODA CHARGER .. $1299 D4 MIS- COX 02 CONVERSION TO CO-2$3995 NEW CATALO/ Ne 25- $150
Edition: Model Aviation - 1984/11
Page Numbers: 46, 47, 135, 138
Radio Control Scale Bob & Dolly Wischer SCALE ELECTRICS An Electric Spit fire Mk la seen Toledo served notice can expect Electric Scale appear competitions 61-inwingspan Spitfire Keith Shaw fea tured retracts AFI Cobalt 25 geared motor Jomar SC-2 speed control distinctive difference between model others Toledo its weight mere 25 ounces batter ies Total weight ready fly 80 ounces present Electric Scale air planes judged along others may changing Electric Scale made its first appearance 1973 Nats Bob Boucher entered Fournier introduced us spectacle Scale silent flight Under ideal conditions Fournier could have quite competitive Unfor tunately Scale flying days 1973 Oshkosh Nats plagued strong gusty winds prolonged time needed Bobs climb maneuver position meant curtailment time needed complete full flight schedule Improvements motors drives control accessories will make Electrics attractive competition subjects Fournier chosen ideal subject Electric Scale Harry Apoian writing Electric Aeromodeing Association newsletter has say about Electric Scale Scale models unique look fly like full-size airplanes challenge lies degree difficulty achieve goals return sense accomplishment use elec tric power Scaleness horizon may expanded include model types up now considered im practical reciprocating engines example pushers multi-engine planes shaft-driven props lighter-than-air geared props self-starting air restarts possible practical promote Electric Scale Electric Aeromodeling Association have emphasize positive aspects ex ploit applications electric power would advantage What best course take Should com pete non-Electric planes regular AMA contests As newly-formed spe cial interest group within AMA position dictate requirements advantage Lets generate Scale rules Electric power need new ideas Scale competition need new categories AMA records 46 Model Aviation An OS Wankel rotary engine powers 6-lb Sopwlth 1 -Strutter displayed Toledo Frank Hoffer Finish Aero Gloss over Coverite Strutter rare WW airDianes easily balanced model formbecause lana noe& Phil Nlggs Precision Scale Douglas AD-6 Skyraider cowl hatch open partially expos ma scale dummy engine Somewhere hidden beneath dummy 05 61 Note oidive brakes shownI Roger Vanbuskirk detalied Vought F4U-1A Corsair panel lines weathering Model %-scaie spans 61 weighs 9 lb uses OS 90 FSR engine Scale RC Scale Free Flight Scale Indoor AMA-EAA will opportunity start fresh dynamic enough advance state art Please let know thoughts ideas new organization Lets improve capabilities enhance enjoyment great hobby Lets hear Harry Apoian 27704 Saddle Road Rollins Hills CA 90274 information subject designing Scale models electric power comes Roland Boucher Leisure Electronics Roland has say about design properly designed con structed Scale model will perform manner similar full-scale airplane will take off land same num ber airplane lengths real plane will climb same angle will snap spin maneuvers scalelike manner plane will also fly Scale speeds allowing same types vertical maneuvers real plane can accomplished follow ing few simple rules first rule keep density weight per cubic foot airplane constant air model flying same air real plane flying makes sense keep plane same density Lets see works out reduce model size scale factor 5 wing span will reduce 1/S real plane density constant will reduce l/S Formula examples scale fac tors number common scales given end article has remarkable effect wing loadingit reduces directly scale factor example A-scale ship would have scale factor 4 would have / wing loading real plane scale speed model will fly propor tional square root its wing load ing A-scale example will stall glide speed full-size plane power required fly model directly proportional its speed weight scale power required would Continued page 135 Brand New Second Edition Consumers Guide RC Aircraft Products complete source Radio Control product information ever published Now Including Boats Cars $95plus $165 UPS shipping charges Name ____________________________________________________________[v32][b2083259811100]] Adireee Send $860 includes shipping UPS APO foreign surface maiI $1246 foreign air maii consumers Guide 150 Ott Street Harrlsonburg VA 22801 November 1984 47 colorful glossy Pitta built Tim Lamp Pilot kit Its covered Monoote Formula U paint trim Wingspan 42 engine 05 40 valuable tool experienced hobbyist must beginner Model Magic Filler Quick setting Light weight Non shrinking Fillets Gap filling Ding repair See dealer urst Model Magic Products Model Magic Products PO Box 7784St Paul Minn 55119 715 425-1397 $595 Retail 8 fI oz Adhesion Balsa Foam Fiberglass Strength Flexing Spreading Fuel Resistance Sanding Hardness Finishing Shelf Life Tint Acceptance Water Resistance Comparison Chart Model Magic Excellent Product X Very Poor a Good As medium balsa As Hard Balsa Any fish/covering till used up Excellent Soft balsa Soft balsa ail Spoils i 5lmo Very Poor Test methods arid data avalable request care enough fill very best uisast Model Magc Fler Circus Magic FiNer Nats start Id love cant Nats RC Pattern coverage will handled Steve McCann Pete Callas members National Society Radio Controlled Aerobatics Pete Steve co-District 7 Vice Presidents NSRCA jointly author District 7 submission K-Factor newsletter NSRCA always look forward K-Factor articles know real treat Nats coverage Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32S48 RO ScalelWlschers Continued page 47 reduced real planes power 1/S3 weight factor l/V speed factor Using Y-scale 65 hp Piper Cub example power re quired would 65 p 65 hp Continental engine turned 72-in-diameter prop 2400 rpm 18-in scale-size prop used must turn faster square root scale fac tor 2400 x -VT rpm example A-scale plane given keep math easy results however 108-in-span plane weighing 12 lbsnot exactly schoolyard flier Lets see what happens prac tical scale factor 1% J-3 Cub chosen choice scale results 61-in-span model weighing 37 oz powered 08 hp motor turn ing l05-in-diameter prop 6285 rpm Today modern 05 geared electric flight systems will fit requirement quite well Table gives scaling factors model Surprisingly 05 fits almost ex actly its weight nearly proportion real power plant 65 hp Conti nental engine weighs about 200 lbs 15 gallons fuel aboard weighs another 90 lbs total 290 lbsor 38o Cubs flying weight 05 flight system weighs about 17 ounces 42o gross model weight bad 05 electric dont have calculator square roots Table II gives scaling factors four popular scales Table wingspan Area weight Speed Power Prop RPM J-3 Cub Scale 1 86 FullSlze Scale Factor Model 353 ft1/S 661 184 sq ft uS 563 sq 750 lbuS 237 ounces 80mph 1/V 1/262 30mph 65 hp 1/S5 x 1/V 1/844 0077 hp 72 in1/5 6105 2400 cruiseV 262 6285 Table 11 ScalIng Factore Consanoely Used 5cale inches11A23 Fractionsi Scale 1/8 1/686 1/6 1/4 Ares uS1/641/471/361/16 weight uS 1/512 1/322 1/216 1/64 Speed 1/Vs 1/283 1/262 1/245 1/2 Power 1/5 x 1/V1/1448 1/844 1/529 1/128 Prop Diameter1/5 1/81/686 1/61/4 Prop speed Vi28326224520 Examples Scale models suitable Leisure LT-50 gear motors Leisure LT-50 *6003A 251 geared 7 call Heath Parasol 02 Span313 ft63in Area weight Speed Power Prop RPM Tayloreraft Span Area weight Speed Power Prop RPM 135 sq ft 650 lb 62 mph 25 hp 55 dia 2800 LeIsure LT-5O *603 31 geared 7 call 0 1 36 ft 184 sq ft 900 lbs 96 mph 65 hp 72 2400 Leisure LT-50 *603B 381 geared 7 cell CurtIs RobIn 0 11 ft Span41 ft Area223 sq ft weight1800 lb Speed100 mph Power90 lip Prop104 RPM1400 540 sq us 44oz 25 mph 005 hp 9 6860 63 us 563 sq us 44 oz 37 mph 008 hp 105 in 6288 615 in 502 sq us 56 oz 35 mph 0062 hp 13 3959 Roland Boucher has come up some handy numbers lead us proper scaling procedure avoid head aches come building too large small also keep model weight power within ballpark Electric Scale now flourishing type information needed fact Continued page 138 November1984 135 tnen wriie caii New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength Sands and carves like basswood! 6 fI oz $895 See dealer IrsI write cal NhJ Model Magic Pociicts Inc =P0 Box 19784 SIPaut MN 55119 715425-1391 TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4 CYCLE 7590 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 NEWNEWNEW 1/5 SCALE 4/STROKE ENGINES WACO HKS-7 74812-4STR ENG GREAT LAKES TRAINER 6490-4STR ENG GREAT LAKES SPECIAL 6490-4STR ENG PLANS$28 EG COWLS$23ECONO-PAC$45 ALSOALSOALSO 1/4 GIANT SCALE BIG ENGINES WACO HKS-7 997525-4 ENG GREAT LAKES SPECIAL 802-25 ENG GREAT LAKES TRAINER 802 ENG PLANS 527 EG COWLS$25FGPANTS$25 ECONO-PAC except TRAINER MOREMOREMORE FARMAN MOUSTIGUE 1/4 SCALE80/40 4/STR NEW NEW NEW 2 ANTIQUE RIG MODELS BILL WINTERS ROOKIE 7240-60/4 STR DEBOLTS LIVE WIRE TRAINER 25% 60 SPAN 21-40 4/5TH ENG PLANS e three 0 orders PP CONT USA NYS Res 8% Tax ASE Brochure NORM ROSENSTOCK 94 CEDAR DRIVE PLAINVIEW NY 11803 PHONE 919442-4939 w wfwf 9499-8975 BOX 2498-MALA MESA CA 92041 caleIWiscers Continued page 135 also applies Scale models Glow- gas-powered models permit us luxury building heavier aircraft getting away wonder will first successfully build fly quarter-scale electric Maybe its already done Unnecessary Scale accidents month before Scale team depart World Championships Paris Team Manager Dolly Wischer received shocking news models lost accident Cliff Tacie prac ticing Spezio TuHoler Another flier aborted takeoff ran model pit area its propeller chewed Cliffs leg leg repair re quired 40 ical stitches Unfor tunately Cliffs Spezio air occured control lost airplane several thousand hours labor its construction refine ment totaled Its performance much improved after changing 60 engine new four-stroke 90 airplane did damage type can assembled few weeks average builder point storyand fly valuable Scale model defensive ly parked pit area its vulnerable have personal ex perience least three occasions damage occured pits ready protect valuable investment time effort money Dont goaded flying other airplanes just prove fearlessness someone taunts expression chicken heard tell person build equal value put sky game combat course dont live fear strong sense apprehension about mix ing valuable airplane swarm quickies will help preserve model have heard Scale airplanes called closet queens because assumed seldom flown due fear damage pilot error other reasons name-callers have long since gone back golf whatever else ing models have preserved continue fly true Scale modeler has long-term commitment sport hobby isnt transient looking stant gratification moves other endeavors fancy dictates thrill controlling missile dimin ished have stopped counting nearmisses air midair collision 28 years RC has enough Defensive flying promote preserva tion model isnt entirely matter protecting against other guy Some accidents occur result performance beyond models capabili ty fly trainers through maneuvers expect same Scale model Tailspins near ground claim some airplanes could have survived bit air underneath time Some spin recoveries delayed intentionally others need decisive action affect response particularly WW II air craft Avoiding inadvertent spin just matter maintaining flying speed way down landing too uses downelevator control Scale flying spin recovery right time apply it happens near ground use down-eleva tor gather speed follow gen tle up-elevator add power prevent re-entry secondary spin have used technique save model course possible because sufficient altitude initially model appeared well its way destruction Steep turns near ground also invitation disaster because too much wings lift being used change direction leaves too little lift supporting models weight now increased centrifugal force add ed gravity snap roll ground actually one-half-turn spin Paint coverage Paint seems have less covering power today compared what normal earlier days modeling Dope materials seems have changed After several coats framework remains visible sil houette through covering held up bright light Experts tell us result lead being banished paint manufacture Apparently term lead sled apt description earlier heavily-finished Scale models An opaque finish still possible penalty excessive weight build-up using coat aluminum paint just beneath final color coats example doped finish mix aluminum powder last coat clear dope has additional advan tage leveling out color differences substrate An amazingly small amount color needed cover aluminum uniform coating heavy spray coator two lighter applica tionswill suffice prefer run receiver antenna through fuselage interior have stories hazardous fuselage sprayed aluminum paint experience indicates no problems signal loss alumi num coats used simulate metal fuselage Bob Doily Wischer S-221 Lapham Peak Rd Delafield WI 53018 Safe Flying No Accident 138 Model Aviation --7 4 tOe run rnrt inrunmniuno AYTON FIUDIRD 40 2310 RAVEN WOOD D PRAIRIE TEXAS 75050 PLAN SET SKIPPED POST PAID IN U 5 WE NOW HAVE COMPLETE LINE OF BROWN TELCO DAVIS CO-2 ENGINES INCLUDING SPARE PARTS SERVICE BROWNTEL CO A-23 PEANUT$3995STANDARD TELCO$3499 CAMPUS BEE $3995 TURBO 3800$3299 CAMPUS TWIN 995 TURBO 9000$3995 SODA CHARGER .. $1299 D4 MIS- COX 02 CONVERSION TO CO-2$3995 NEW CATALO/ Ne 25- $150