DAN BUNCHS Scorpion Major OldTimer Month time plane confused two English Keil Kraft kits later date Scorpion Scorpion Major latter two planes enlarged sim plified versions Scotty Murrays Answer Ive mentioned previous columns Scorpion Major kitted Bunch Model Airplane Co Los Angeles CA companion its engines see photo ad taken September 1938 issue Model Airplane News kit available June November 1936 Ill have say about shortly Much following information based information John Pond wrote Summer 1968 edition Engine Collectors Journal correspondence Joe Wagner Joseph Danner Bunch native Californian got model airplanes after starting career track full-scale aviationthe exact re verse route people era 1938 enrolled aeronautical engineering student Curtiss-Wright Technical Institute located Grand Central Air Terminal Glendale CA Like thousands other young men timeframe exploits Lindberg Chamberlain intense national interest anything airplanes strong influence him Un fortunately devastating economic upheaval 1929 made work hard findespecially aviation industry seemingly daily bank ruptcies affected few firms Although Dan Bunch both engineering degree commercial pilots license quickly apparent make living some other form work needed As possi ble means surviving Dan chose enter model airplane business first efforts rubber-powered kits appeared strongly influenced designs Gordon S Light time known internationally through pages Air Trails magazine Planes both designers fea Goal tVhw 8unch Model Airplane Co Los Angeles Ca SCORPION MAJOR Wlngspn 51 k Weight 21 Lb Dibdl 0141 cm TIp Rib blest Rudder SIshlilcee Rib Z1LI LI 0 folks Dan Bunchs 1936 Scorpion MajorDocs Old-Timer Month October tured long spidery landing gear lightweight successful competition outdated ap structures humongous rudders Yes pearance made obsolete time off another design sporting ludicrous rud- packaged placed shelves lo der Although Darfs designs flew quite well cal hobby dealers 4 SPEC IF CAT 0 N S Bonch Engines fall 1/5 h p 5250 rpm 4 p 8500 r p m Bore o ke 0 Bare weight flyc Engines assembled block-tented kits complete coil condenser fool tank Champion spark plug Engine kits supplied piston piston rings asd main searing fitted ready ran Also timer assembly set op points adjustOd MIGHTY-MIDGET iineiht Asbid $950 MIGHTY-MIDGET apriqsEit785 MIGHTY-MIDGET IermAbid 975 MIGHTY-MIDGET tnrtd Kit785 GWIN-AEEO 8priqhtAbiud1200 GwIN-AEEO aprihe Kit980 GWIH-AEEO tnrtdAbtd1250 GWIN-AEEO .rsud Kit985 flIGHTY MARINE A.btd 1250 MIGHTY MARINE ci1085 ao ens east pad Zoda% SdPattl m iIL j ii 4 P!I khsJ p JVb aI Heres ad September 1938 Model Airplane News Engines typical ones manufactured Bunch era long-remembered Bunch Tiger came out little later 56 Model Aviation Radio Conoi Old-Timers Dr DB Mathews 909 N Maize Rd Townhouse 734 Wichita KS 67212 Gerald Murphys Bunch Scorpion Major uses O&R 29 ignitionnote big rudder Jim Calahan De Soto MO Robert Burgess Louisville KY Super Buccaneer Like everyone days early start rather primitive back 1932 two years later things going well enough tiny firm began advertise national model mag azines about time electrifying activi ties Maxwell Basset Joe Kovel others gasoline-engine-powered models sweeping hobby Dan Bunch became terested possibilities producing en gine Among engine historians true enigma seems exist what role Harry Gwinn played capitalizing Bunch some have talked actually question whether such person really existed speculation Harry Gwinn may have nom de plume some relative Dans fact well documented however Dan Bunch produced number engine de signs quite successful Scorpion Major essentially designed match engine sold role chew old bone some cant help agree John Pond stated previ ously mentioned article Although have no reports Rubber designs flying abilities large rudder appears make designs ex tremely sensitive spiral diving tendencies speculation tendency spelled early demise Free Flight design reader has experience Bunch Scor pion Major Free Flight model would appre ciate having comments Now seaplane Scorpion Major rather successful Howard Braughton some others held national ROW rise-off-water Ed records design reason its success Simply float-equipped models re quire vertical fin area compensate Continued page 153 Agressor R F high quality balsa Plywood fwfly airplane Covered Monokote can easily repaired should need like foam ARFs Agressor very competitive Fun Fly events also available built order $14995 plus $iSP& H Just add engine tank$11995 radio go FlypbisSl2OOP&H CRENSHAW AERO RR 1 Box 121 Manifla IN 46150 317-398-6529 M-F till 400 pm CST 317525-9074 After 500 pm Weekends Scale Height 5 Width ht 6oz Price $1995 ea P&H $325 per item Calif resid add sales tax 209 224-41 70 October 1989 57 Aguinald DeQueiroz Recite Brazil Original Buccaneer Docs drawings Janu ary 1980 issue Model Airplane News HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 l4~reprQudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP bones Bill Knepps Buccaneer Stan dard Ready go 50 years after started building first three-view design Docs October 86 column 1/4 Scale Modelers ch Has Ended Look No Further Perfect Pilot Bust Comnietely finished equipped ready fly L... M9@ enterprises po box 5631 fresno calif 93755 49span 45length 04 channel trical wing Engine35-502cy45-654cy Red silver trim k cockpit still creeps now no other reason simply looks better looks good scores high HUMAN ERROR recent contest sev eral us watching flight amaz ing hear different opinions quality maneuver would have thought watching different airplanes Yes maybe problem people will detect errorsminor onesthat other people simply will see dont see errors scores will obviously higher folks have reputations being easy judges simply dont see errors Its because arent looking because dont see mistakes training problem really eyesight perception prob lem judges usually score very high upper classes mistakes small er rors also probably affected old buddy Halo Factor think youll agree Paul Verger will have very interesting Nats report Im looking ward reading RC Giant Scale/de Vries Continued page 55 way go found Radio Shack carries torch proper oxygen cylindersso Im back business usual schedule holds next month space will taken over Nats reports Back atcha December issue probably news big IMAA to-do Odessa TX RC Old-Timers/Mathews Continued page 57 lateral area floats So would appear quite accident Dan hit design wellsuited flying off waterbut red hot traditional flying anyone interested twin floats 20 long profile much like full-scale Edo floats bottom steps located planes CG 4i/2 wide supported three wire units attached fuselage bottom cross braces two spots tail float single 8 x 3-in unit having teardrop shape mounted directly below horizontal tail plane Scorpion Major kit withdrawn market Bunch concentrated produc ing engines Later made tethered race cars speedboat kit never again pro duced model airplane kits Hisengines continued mainstay com pany until suicide 1948 Scorpion Major RC-Assist model quote Gerald Murphy Herford TX Bunch Scorpion Major powered ignition O&R 29 flies better should really wanted after watching Eut Tileston fly times contestsa real contender looked like Old-Timer Rubber job engine has character gear legs built using six pieces balsa wheels balsa cores surgical tubing tires turned out about 6 oz overweight smaller batteries some other mods still 3 oz over shows difficult get smaller model down 10 oz/sq ft Continued page 1S7 LANDER INDUST 1005 19TH 5T CT VISA HAVAC MONTANA 59501 406-265-6529 BUILDING BOARD 24x72$5395NtLFRT 24x48$4495NcLFRT CANADIAN ORDERS ADD 25% Build straight spending fortune durable high density 1/2' pin surfate bonded 3/4' laminated warp free base straight true work surtace will last years years J * ***** * ****** * * * ** *** ** *** * * * * * WANDIT * N *Dealers Invited * *wile ysirwarranty *p * * or Dry 1OftCORD~ * * Stick Abrasives p *A KeenMachine gives ecceptional *sandingcontrol excellent finish * * 89Basic Ccl 1 flat Wand 1 *of 6 grits *10395Builder Special mcI 2 tlat hatt *round wand 5 6 grits *12995Deluxe includes 3 flat 2 half p *round wands 2 buff wands *tO 6 grits * *Addilionaf wands Abrasives available *See local hobby shop *WANDITOMFG. I44OS916O *p * P09515183Ddu1flt752sI51pp October 1989 153 L- 1 RC Old-Timers/Mathews Continued page 153 rule Scorpion tends balance nose-heavy CU should chord weight should close 10-oz rule possible Scorpion satisfying model build fly its thin wing airfoil has really good climbeven O&R 29 doesnt have power some repro 29s glide isnt good some floaters much faster outstanding windy weather Notice Jerry doesnt say anything about spiral stability Obviously radio installed Scorpion has something going Plans No 4E3 available John Pond OldTime Plan Service 253 No 4th St PO Box 90310 San Jose CA 95109-3310 An anatomical impossibility started make heading paragraph Wanna put Tiger Scorpion isnt sensible Herb WahI Box 61 Forksville PA 18616 cur rently manufacturing reproductions Bunch Tiger engine familiar Herbs previous Brown Ohlsson reproduc tions can attest quality work recommend him sky Tiger later Bunch engine looks much like Mighty Midget/Gwinn Aero shown reproduced ad Contact Herb WahI availability price reproductions Another option Forster 29 35 power plants being reproduced RJL Industries out California Forsters original casting dies being used new engines being ma chined modern computer-controlled units Both late-model front-intake ver sions engines however equipped original-style Forster ignition timers Phantom P-30 fuel tanks aspect oper ation find fascinating fact engines being boxed original re printed Forster boxes Fifties will clude original Forster instruction sheets Write RJL Industries PO Box 5 Sierra Madre CA 91024 telephone 1-818/359-0016 Now heres slow builder Back Sixties Seventies sons compet ing Nats level fun aspects Na tionals Scale cage Back 100 FF Scale entries placed chickenwire cage mounted risers handful RC Scale ships would too well lots CL Scale planes view first day meet until night before Scale event flown Since Navy host meet Scale cage usually hangar separate larger housed contestant workbenches model boxes Yes model competed Nats built right meet workbenches particularly Free Flights Both hangars full activity late hours night some modelers actually working entries night competition flights next day great fun unforgettable experience now long gone Nats chief judges event directors Free Flightand occasion ally CLevents wonderfully efficient friendly couple named Bill Irene Knepp Sons still recall fondly day As years have worn have managed keep touch Bill has frequently provided three-views full-scale aircraft rare would question authentic ity integrity source year ago Bill sent photo re cently completed Buccaneer Standard three-view column October 1986 following story Way back dim days September 1937 entered Gas model contest Scranton PA Bill Effinger Owner Berkeley Models small Buccaneer also new Super Buccaneer small interested said hed have kit Out few months t days really meant box full balsa strips sheet blocks builder took early 1938 sent kit began building However enlisted Navy May year sold partially completed Buc caneer Standard friends really never built few years ago ordered plans new version WE Technical Services sappointed beefed up structure much called Fox 40 power opinion would way too much So fi nally put drawings board traced outlines onto some clean paper drew own structure much along lines wrote about mounted 05 25 first flew last spring flies beautifully 5 lb OS turns 11 x 6 prop doesnt know difference close what dreamed about original started long ago So took Bill Knepp 50 years get Buc caneer Standard air Some us have started projects should have left trash man first place RC Electrics/Kopski Continued page 59 up find Out Conversely speed controls intended used fewer six cells pretty much have hard-wired receiver technical reasons latter fol low Speed controls use MOSFETs metal-oxide semiconductor field-effect transistorEd cho sen very low On-resistance low-R FETs need six volts little gate drive signal Normally gate signal comes motor-battery-powered speed-control electronics Speed controls intended used fewer six motor cells have utilize receiver battery way another add lower motor battery voltage make up necessary tal gate drive voltage What means such controls can t use optical coupling re ceiver its battery must hard-wired motor control electronics Now know some low-cell-count speed controls may glitch ier others Another speed control preference power control signal motor high rate rather frame rate now just want describe difference save reasons future column high-rate type control uses high switching rate power on/off proportionally control motor types typically produce audible sound motor itself easily recognized low throttle settings whine motor singing frame-rate types use basic transmitter signal frame timing usually around 50 Hz LEARNING TO FLY RADIO CONTROL MODEL AIRPLANES Book Taught Tens Thousands covers * Selecting First Plane * Beginners First Turns * The Stall Friends * Takeoffs Landings * Simple Aerobatics * Deadstick Landings * Flying High Winds * Advanced Aerobatics * Teaching Yourself Absolutely Have copy send $995 plus $100 postage handling CARROLL CONSULTING Box 3391 Arlington VA 22201 October 1989 157 Dont Fly Like Buy Book FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size & shape wheel pants custom Make Parts Vacuum Form Canopies Plome mmd $1 couplet kt TAD FIBERILASS SPECIALTIES 38624 Mt Kisco Dr Sterling l-lgts Ml 48310 PHONE 313421-6358 RUlED & HEAITREAIEO WIRE GEARS & CASAWES PHONE 313 978-2512
Edition: Model Aviation - 1989/10
Page Numbers: 56, 57, 153, 157
DAN BUNCHS Scorpion Major OldTimer Month time plane confused two English Keil Kraft kits later date Scorpion Scorpion Major latter two planes enlarged sim plified versions Scotty Murrays Answer Ive mentioned previous columns Scorpion Major kitted Bunch Model Airplane Co Los Angeles CA companion its engines see photo ad taken September 1938 issue Model Airplane News kit available June November 1936 Ill have say about shortly Much following information based information John Pond wrote Summer 1968 edition Engine Collectors Journal correspondence Joe Wagner Joseph Danner Bunch native Californian got model airplanes after starting career track full-scale aviationthe exact re verse route people era 1938 enrolled aeronautical engineering student Curtiss-Wright Technical Institute located Grand Central Air Terminal Glendale CA Like thousands other young men timeframe exploits Lindberg Chamberlain intense national interest anything airplanes strong influence him Un fortunately devastating economic upheaval 1929 made work hard findespecially aviation industry seemingly daily bank ruptcies affected few firms Although Dan Bunch both engineering degree commercial pilots license quickly apparent make living some other form work needed As possi ble means surviving Dan chose enter model airplane business first efforts rubber-powered kits appeared strongly influenced designs Gordon S Light time known internationally through pages Air Trails magazine Planes both designers fea Goal tVhw 8unch Model Airplane Co Los Angeles Ca SCORPION MAJOR Wlngspn 51 k Weight 21 Lb Dibdl 0141 cm TIp Rib blest Rudder SIshlilcee Rib Z1LI LI 0 folks Dan Bunchs 1936 Scorpion MajorDocs Old-Timer Month October tured long spidery landing gear lightweight successful competition outdated ap structures humongous rudders Yes pearance made obsolete time off another design sporting ludicrous rud- packaged placed shelves lo der Although Darfs designs flew quite well cal hobby dealers 4 SPEC IF CAT 0 N S Bonch Engines fall 1/5 h p 5250 rpm 4 p 8500 r p m Bore o ke 0 Bare weight flyc Engines assembled block-tented kits complete coil condenser fool tank Champion spark plug Engine kits supplied piston piston rings asd main searing fitted ready ran Also timer assembly set op points adjustOd MIGHTY-MIDGET iineiht Asbid $950 MIGHTY-MIDGET apriqsEit785 MIGHTY-MIDGET IermAbid 975 MIGHTY-MIDGET tnrtd Kit785 GWIN-AEEO 8priqhtAbiud1200 GwIN-AEEO aprihe Kit980 GWIH-AEEO tnrtdAbtd1250 GWIN-AEEO .rsud Kit985 flIGHTY MARINE A.btd 1250 MIGHTY MARINE ci1085 ao ens east pad Zoda% SdPattl m iIL j ii 4 P!I khsJ p JVb aI Heres ad September 1938 Model Airplane News Engines typical ones manufactured Bunch era long-remembered Bunch Tiger came out little later 56 Model Aviation Radio Conoi Old-Timers Dr DB Mathews 909 N Maize Rd Townhouse 734 Wichita KS 67212 Gerald Murphys Bunch Scorpion Major uses O&R 29 ignitionnote big rudder Jim Calahan De Soto MO Robert Burgess Louisville KY Super Buccaneer Like everyone days early start rather primitive back 1932 two years later things going well enough tiny firm began advertise national model mag azines about time electrifying activi ties Maxwell Basset Joe Kovel others gasoline-engine-powered models sweeping hobby Dan Bunch became terested possibilities producing en gine Among engine historians true enigma seems exist what role Harry Gwinn played capitalizing Bunch some have talked actually question whether such person really existed speculation Harry Gwinn may have nom de plume some relative Dans fact well documented however Dan Bunch produced number engine de signs quite successful Scorpion Major essentially designed match engine sold role chew old bone some cant help agree John Pond stated previ ously mentioned article Although have no reports Rubber designs flying abilities large rudder appears make designs ex tremely sensitive spiral diving tendencies speculation tendency spelled early demise Free Flight design reader has experience Bunch Scor pion Major Free Flight model would appre ciate having comments Now seaplane Scorpion Major rather successful Howard Braughton some others held national ROW rise-off-water Ed records design reason its success Simply float-equipped models re quire vertical fin area compensate Continued page 153 Agressor R F high quality balsa Plywood fwfly airplane Covered Monokote can easily repaired should need like foam ARFs Agressor very competitive Fun Fly events also available built order $14995 plus $iSP& H Just add engine tank$11995 radio go FlypbisSl2OOP&H CRENSHAW AERO RR 1 Box 121 Manifla IN 46150 317-398-6529 M-F till 400 pm CST 317525-9074 After 500 pm Weekends Scale Height 5 Width ht 6oz Price $1995 ea P&H $325 per item Calif resid add sales tax 209 224-41 70 October 1989 57 Aguinald DeQueiroz Recite Brazil Original Buccaneer Docs drawings Janu ary 1980 issue Model Airplane News HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 l4~reprQudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP bones Bill Knepps Buccaneer Stan dard Ready go 50 years after started building first three-view design Docs October 86 column 1/4 Scale Modelers ch Has Ended Look No Further Perfect Pilot Bust Comnietely finished equipped ready fly L... M9@ enterprises po box 5631 fresno calif 93755 49span 45length 04 channel trical wing Engine35-502cy45-654cy Red silver trim k cockpit still creeps now no other reason simply looks better looks good scores high HUMAN ERROR recent contest sev eral us watching flight amaz ing hear different opinions quality maneuver would have thought watching different airplanes Yes maybe problem people will detect errorsminor onesthat other people simply will see dont see errors scores will obviously higher folks have reputations being easy judges simply dont see errors Its because arent looking because dont see mistakes training problem really eyesight perception prob lem judges usually score very high upper classes mistakes small er rors also probably affected old buddy Halo Factor think youll agree Paul Verger will have very interesting Nats report Im looking ward reading RC Giant Scale/de Vries Continued page 55 way go found Radio Shack carries torch proper oxygen cylindersso Im back business usual schedule holds next month space will taken over Nats reports Back atcha December issue probably news big IMAA to-do Odessa TX RC Old-Timers/Mathews Continued page 57 lateral area floats So would appear quite accident Dan hit design wellsuited flying off waterbut red hot traditional flying anyone interested twin floats 20 long profile much like full-scale Edo floats bottom steps located planes CG 4i/2 wide supported three wire units attached fuselage bottom cross braces two spots tail float single 8 x 3-in unit having teardrop shape mounted directly below horizontal tail plane Scorpion Major kit withdrawn market Bunch concentrated produc ing engines Later made tethered race cars speedboat kit never again pro duced model airplane kits Hisengines continued mainstay com pany until suicide 1948 Scorpion Major RC-Assist model quote Gerald Murphy Herford TX Bunch Scorpion Major powered ignition O&R 29 flies better should really wanted after watching Eut Tileston fly times contestsa real contender looked like Old-Timer Rubber job engine has character gear legs built using six pieces balsa wheels balsa cores surgical tubing tires turned out about 6 oz overweight smaller batteries some other mods still 3 oz over shows difficult get smaller model down 10 oz/sq ft Continued page 1S7 LANDER INDUST 1005 19TH 5T CT VISA HAVAC MONTANA 59501 406-265-6529 BUILDING BOARD 24x72$5395NtLFRT 24x48$4495NcLFRT CANADIAN ORDERS ADD 25% Build straight spending fortune durable high density 1/2' pin surfate bonded 3/4' laminated warp free base straight true work surtace will last years years J * ***** * ****** * * * ** *** ** *** * * * * * WANDIT * N *Dealers Invited * *wile ysirwarranty *p * * or Dry 1OftCORD~ * * Stick Abrasives p *A KeenMachine gives ecceptional *sandingcontrol excellent finish * * 89Basic Ccl 1 flat Wand 1 *of 6 grits *10395Builder Special mcI 2 tlat hatt *round wand 5 6 grits *12995Deluxe includes 3 flat 2 half p *round wands 2 buff wands *tO 6 grits * *Addilionaf wands Abrasives available *See local hobby shop *WANDITOMFG. I44OS916O *p * P09515183Ddu1flt752sI51pp October 1989 153 L- 1 RC Old-Timers/Mathews Continued page 153 rule Scorpion tends balance nose-heavy CU should chord weight should close 10-oz rule possible Scorpion satisfying model build fly its thin wing airfoil has really good climbeven O&R 29 doesnt have power some repro 29s glide isnt good some floaters much faster outstanding windy weather Notice Jerry doesnt say anything about spiral stability Obviously radio installed Scorpion has something going Plans No 4E3 available John Pond OldTime Plan Service 253 No 4th St PO Box 90310 San Jose CA 95109-3310 An anatomical impossibility started make heading paragraph Wanna put Tiger Scorpion isnt sensible Herb WahI Box 61 Forksville PA 18616 cur rently manufacturing reproductions Bunch Tiger engine familiar Herbs previous Brown Ohlsson reproduc tions can attest quality work recommend him sky Tiger later Bunch engine looks much like Mighty Midget/Gwinn Aero shown reproduced ad Contact Herb WahI availability price reproductions Another option Forster 29 35 power plants being reproduced RJL Industries out California Forsters original casting dies being used new engines being ma chined modern computer-controlled units Both late-model front-intake ver sions engines however equipped original-style Forster ignition timers Phantom P-30 fuel tanks aspect oper ation find fascinating fact engines being boxed original re printed Forster boxes Fifties will clude original Forster instruction sheets Write RJL Industries PO Box 5 Sierra Madre CA 91024 telephone 1-818/359-0016 Now heres slow builder Back Sixties Seventies sons compet ing Nats level fun aspects Na tionals Scale cage Back 100 FF Scale entries placed chickenwire cage mounted risers handful RC Scale ships would too well lots CL Scale planes view first day meet until night before Scale event flown Since Navy host meet Scale cage usually hangar separate larger housed contestant workbenches model boxes Yes model competed Nats built right meet workbenches particularly Free Flights Both hangars full activity late hours night some modelers actually working entries night competition flights next day great fun unforgettable experience now long gone Nats chief judges event directors Free Flightand occasion ally CLevents wonderfully efficient friendly couple named Bill Irene Knepp Sons still recall fondly day As years have worn have managed keep touch Bill has frequently provided three-views full-scale aircraft rare would question authentic ity integrity source year ago Bill sent photo re cently completed Buccaneer Standard three-view column October 1986 following story Way back dim days September 1937 entered Gas model contest Scranton PA Bill Effinger Owner Berkeley Models small Buccaneer also new Super Buccaneer small interested said hed have kit Out few months t days really meant box full balsa strips sheet blocks builder took early 1938 sent kit began building However enlisted Navy May year sold partially completed Buc caneer Standard friends really never built few years ago ordered plans new version WE Technical Services sappointed beefed up structure much called Fox 40 power opinion would way too much So fi nally put drawings board traced outlines onto some clean paper drew own structure much along lines wrote about mounted 05 25 first flew last spring flies beautifully 5 lb OS turns 11 x 6 prop doesnt know difference close what dreamed about original started long ago So took Bill Knepp 50 years get Buc caneer Standard air Some us have started projects should have left trash man first place RC Electrics/Kopski Continued page 59 up find Out Conversely speed controls intended used fewer six cells pretty much have hard-wired receiver technical reasons latter fol low Speed controls use MOSFETs metal-oxide semiconductor field-effect transistorEd cho sen very low On-resistance low-R FETs need six volts little gate drive signal Normally gate signal comes motor-battery-powered speed-control electronics Speed controls intended used fewer six motor cells have utilize receiver battery way another add lower motor battery voltage make up necessary tal gate drive voltage What means such controls can t use optical coupling re ceiver its battery must hard-wired motor control electronics Now know some low-cell-count speed controls may glitch ier others Another speed control preference power control signal motor high rate rather frame rate now just want describe difference save reasons future column high-rate type control uses high switching rate power on/off proportionally control motor types typically produce audible sound motor itself easily recognized low throttle settings whine motor singing frame-rate types use basic transmitter signal frame timing usually around 50 Hz LEARNING TO FLY RADIO CONTROL MODEL AIRPLANES Book Taught Tens Thousands covers * Selecting First Plane * Beginners First Turns * The Stall Friends * Takeoffs Landings * Simple Aerobatics * Deadstick Landings * Flying High Winds * Advanced Aerobatics * Teaching Yourself Absolutely Have copy send $995 plus $100 postage handling CARROLL CONSULTING Box 3391 Arlington VA 22201 October 1989 157 Dont Fly Like Buy Book FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size & shape wheel pants custom Make Parts Vacuum Form Canopies Plome mmd $1 couplet kt TAD FIBERILASS SPECIALTIES 38624 Mt Kisco Dr Sterling l-lgts Ml 48310 PHONE 313421-6358 RUlED & HEAITREAIEO WIRE GEARS & CASAWES PHONE 313 978-2512
Edition: Model Aviation - 1989/10
Page Numbers: 56, 57, 153, 157
DAN BUNCHS Scorpion Major OldTimer Month time plane confused two English Keil Kraft kits later date Scorpion Scorpion Major latter two planes enlarged sim plified versions Scotty Murrays Answer Ive mentioned previous columns Scorpion Major kitted Bunch Model Airplane Co Los Angeles CA companion its engines see photo ad taken September 1938 issue Model Airplane News kit available June November 1936 Ill have say about shortly Much following information based information John Pond wrote Summer 1968 edition Engine Collectors Journal correspondence Joe Wagner Joseph Danner Bunch native Californian got model airplanes after starting career track full-scale aviationthe exact re verse route people era 1938 enrolled aeronautical engineering student Curtiss-Wright Technical Institute located Grand Central Air Terminal Glendale CA Like thousands other young men timeframe exploits Lindberg Chamberlain intense national interest anything airplanes strong influence him Un fortunately devastating economic upheaval 1929 made work hard findespecially aviation industry seemingly daily bank ruptcies affected few firms Although Dan Bunch both engineering degree commercial pilots license quickly apparent make living some other form work needed As possi ble means surviving Dan chose enter model airplane business first efforts rubber-powered kits appeared strongly influenced designs Gordon S Light time known internationally through pages Air Trails magazine Planes both designers fea Goal tVhw 8unch Model Airplane Co Los Angeles Ca SCORPION MAJOR Wlngspn 51 k Weight 21 Lb Dibdl 0141 cm TIp Rib blest Rudder SIshlilcee Rib Z1LI LI 0 folks Dan Bunchs 1936 Scorpion MajorDocs Old-Timer Month October tured long spidery landing gear lightweight successful competition outdated ap structures humongous rudders Yes pearance made obsolete time off another design sporting ludicrous rud- packaged placed shelves lo der Although Darfs designs flew quite well cal hobby dealers 4 SPEC IF CAT 0 N S Bonch Engines fall 1/5 h p 5250 rpm 4 p 8500 r p m Bore o ke 0 Bare weight flyc Engines assembled block-tented kits complete coil condenser fool tank Champion spark plug Engine kits supplied piston piston rings asd main searing fitted ready ran Also timer assembly set op points adjustOd MIGHTY-MIDGET iineiht Asbid $950 MIGHTY-MIDGET apriqsEit785 MIGHTY-MIDGET IermAbid 975 MIGHTY-MIDGET tnrtd Kit785 GWIN-AEEO 8priqhtAbiud1200 GwIN-AEEO aprihe Kit980 GWIH-AEEO tnrtdAbtd1250 GWIN-AEEO .rsud Kit985 flIGHTY MARINE A.btd 1250 MIGHTY MARINE ci1085 ao ens east pad Zoda% SdPattl m iIL j ii 4 P!I khsJ p JVb aI Heres ad September 1938 Model Airplane News Engines typical ones manufactured Bunch era long-remembered Bunch Tiger came out little later 56 Model Aviation Radio Conoi Old-Timers Dr DB Mathews 909 N Maize Rd Townhouse 734 Wichita KS 67212 Gerald Murphys Bunch Scorpion Major uses O&R 29 ignitionnote big rudder Jim Calahan De Soto MO Robert Burgess Louisville KY Super Buccaneer Like everyone days early start rather primitive back 1932 two years later things going well enough tiny firm began advertise national model mag azines about time electrifying activi ties Maxwell Basset Joe Kovel others gasoline-engine-powered models sweeping hobby Dan Bunch became terested possibilities producing en gine Among engine historians true enigma seems exist what role Harry Gwinn played capitalizing Bunch some have talked actually question whether such person really existed speculation Harry Gwinn may have nom de plume some relative Dans fact well documented however Dan Bunch produced number engine de signs quite successful Scorpion Major essentially designed match engine sold role chew old bone some cant help agree John Pond stated previ ously mentioned article Although have no reports Rubber designs flying abilities large rudder appears make designs ex tremely sensitive spiral diving tendencies speculation tendency spelled early demise Free Flight design reader has experience Bunch Scor pion Major Free Flight model would appre ciate having comments Now seaplane Scorpion Major rather successful Howard Braughton some others held national ROW rise-off-water Ed records design reason its success Simply float-equipped models re quire vertical fin area compensate Continued page 153 Agressor R F high quality balsa Plywood fwfly airplane Covered Monokote can easily repaired should need like foam ARFs Agressor very competitive Fun Fly events also available built order $14995 plus $iSP& H Just add engine tank$11995 radio go FlypbisSl2OOP&H CRENSHAW AERO RR 1 Box 121 Manifla IN 46150 317-398-6529 M-F till 400 pm CST 317525-9074 After 500 pm Weekends Scale Height 5 Width ht 6oz Price $1995 ea P&H $325 per item Calif resid add sales tax 209 224-41 70 October 1989 57 Aguinald DeQueiroz Recite Brazil Original Buccaneer Docs drawings Janu ary 1980 issue Model Airplane News HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 l4~reprQudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP bones Bill Knepps Buccaneer Stan dard Ready go 50 years after started building first three-view design Docs October 86 column 1/4 Scale Modelers ch Has Ended Look No Further Perfect Pilot Bust Comnietely finished equipped ready fly L... M9@ enterprises po box 5631 fresno calif 93755 49span 45length 04 channel trical wing Engine35-502cy45-654cy Red silver trim k cockpit still creeps now no other reason simply looks better looks good scores high HUMAN ERROR recent contest sev eral us watching flight amaz ing hear different opinions quality maneuver would have thought watching different airplanes Yes maybe problem people will detect errorsminor onesthat other people simply will see dont see errors scores will obviously higher folks have reputations being easy judges simply dont see errors Its because arent looking because dont see mistakes training problem really eyesight perception prob lem judges usually score very high upper classes mistakes small er rors also probably affected old buddy Halo Factor think youll agree Paul Verger will have very interesting Nats report Im looking ward reading RC Giant Scale/de Vries Continued page 55 way go found Radio Shack carries torch proper oxygen cylindersso Im back business usual schedule holds next month space will taken over Nats reports Back atcha December issue probably news big IMAA to-do Odessa TX RC Old-Timers/Mathews Continued page 57 lateral area floats So would appear quite accident Dan hit design wellsuited flying off waterbut red hot traditional flying anyone interested twin floats 20 long profile much like full-scale Edo floats bottom steps located planes CG 4i/2 wide supported three wire units attached fuselage bottom cross braces two spots tail float single 8 x 3-in unit having teardrop shape mounted directly below horizontal tail plane Scorpion Major kit withdrawn market Bunch concentrated produc ing engines Later made tethered race cars speedboat kit never again pro duced model airplane kits Hisengines continued mainstay com pany until suicide 1948 Scorpion Major RC-Assist model quote Gerald Murphy Herford TX Bunch Scorpion Major powered ignition O&R 29 flies better should really wanted after watching Eut Tileston fly times contestsa real contender looked like Old-Timer Rubber job engine has character gear legs built using six pieces balsa wheels balsa cores surgical tubing tires turned out about 6 oz overweight smaller batteries some other mods still 3 oz over shows difficult get smaller model down 10 oz/sq ft Continued page 1S7 LANDER INDUST 1005 19TH 5T CT VISA HAVAC MONTANA 59501 406-265-6529 BUILDING BOARD 24x72$5395NtLFRT 24x48$4495NcLFRT CANADIAN ORDERS ADD 25% Build straight spending fortune durable high density 1/2' pin surfate bonded 3/4' laminated warp free base straight true work surtace will last years years J * ***** * ****** * * * ** *** ** *** * * * * * WANDIT * N *Dealers Invited * *wile ysirwarranty *p * * or Dry 1OftCORD~ * * Stick Abrasives p *A KeenMachine gives ecceptional *sandingcontrol excellent finish * * 89Basic Ccl 1 flat Wand 1 *of 6 grits *10395Builder Special mcI 2 tlat hatt *round wand 5 6 grits *12995Deluxe includes 3 flat 2 half p *round wands 2 buff wands *tO 6 grits * *Addilionaf wands Abrasives available *See local hobby shop *WANDITOMFG. I44OS916O *p * P09515183Ddu1flt752sI51pp October 1989 153 L- 1 RC Old-Timers/Mathews Continued page 153 rule Scorpion tends balance nose-heavy CU should chord weight should close 10-oz rule possible Scorpion satisfying model build fly its thin wing airfoil has really good climbeven O&R 29 doesnt have power some repro 29s glide isnt good some floaters much faster outstanding windy weather Notice Jerry doesnt say anything about spiral stability Obviously radio installed Scorpion has something going Plans No 4E3 available John Pond OldTime Plan Service 253 No 4th St PO Box 90310 San Jose CA 95109-3310 An anatomical impossibility started make heading paragraph Wanna put Tiger Scorpion isnt sensible Herb WahI Box 61 Forksville PA 18616 cur rently manufacturing reproductions Bunch Tiger engine familiar Herbs previous Brown Ohlsson reproduc tions can attest quality work recommend him sky Tiger later Bunch engine looks much like Mighty Midget/Gwinn Aero shown reproduced ad Contact Herb WahI availability price reproductions Another option Forster 29 35 power plants being reproduced RJL Industries out California Forsters original casting dies being used new engines being ma chined modern computer-controlled units Both late-model front-intake ver sions engines however equipped original-style Forster ignition timers Phantom P-30 fuel tanks aspect oper ation find fascinating fact engines being boxed original re printed Forster boxes Fifties will clude original Forster instruction sheets Write RJL Industries PO Box 5 Sierra Madre CA 91024 telephone 1-818/359-0016 Now heres slow builder Back Sixties Seventies sons compet ing Nats level fun aspects Na tionals Scale cage Back 100 FF Scale entries placed chickenwire cage mounted risers handful RC Scale ships would too well lots CL Scale planes view first day meet until night before Scale event flown Since Navy host meet Scale cage usually hangar separate larger housed contestant workbenches model boxes Yes model competed Nats built right meet workbenches particularly Free Flights Both hangars full activity late hours night some modelers actually working entries night competition flights next day great fun unforgettable experience now long gone Nats chief judges event directors Free Flightand occasion ally CLevents wonderfully efficient friendly couple named Bill Irene Knepp Sons still recall fondly day As years have worn have managed keep touch Bill has frequently provided three-views full-scale aircraft rare would question authentic ity integrity source year ago Bill sent photo re cently completed Buccaneer Standard three-view column October 1986 following story Way back dim days September 1937 entered Gas model contest Scranton PA Bill Effinger Owner Berkeley Models small Buccaneer also new Super Buccaneer small interested said hed have kit Out few months t days really meant box full balsa strips sheet blocks builder took early 1938 sent kit began building However enlisted Navy May year sold partially completed Buc caneer Standard friends really never built few years ago ordered plans new version WE Technical Services sappointed beefed up structure much called Fox 40 power opinion would way too much So fi nally put drawings board traced outlines onto some clean paper drew own structure much along lines wrote about mounted 05 25 first flew last spring flies beautifully 5 lb OS turns 11 x 6 prop doesnt know difference close what dreamed about original started long ago So took Bill Knepp 50 years get Buc caneer Standard air Some us have started projects should have left trash man first place RC Electrics/Kopski Continued page 59 up find Out Conversely speed controls intended used fewer six cells pretty much have hard-wired receiver technical reasons latter fol low Speed controls use MOSFETs metal-oxide semiconductor field-effect transistorEd cho sen very low On-resistance low-R FETs need six volts little gate drive signal Normally gate signal comes motor-battery-powered speed-control electronics Speed controls intended used fewer six motor cells have utilize receiver battery way another add lower motor battery voltage make up necessary tal gate drive voltage What means such controls can t use optical coupling re ceiver its battery must hard-wired motor control electronics Now know some low-cell-count speed controls may glitch ier others Another speed control preference power control signal motor high rate rather frame rate now just want describe difference save reasons future column high-rate type control uses high switching rate power on/off proportionally control motor types typically produce audible sound motor itself easily recognized low throttle settings whine motor singing frame-rate types use basic transmitter signal frame timing usually around 50 Hz LEARNING TO FLY RADIO CONTROL MODEL AIRPLANES Book Taught Tens Thousands covers * Selecting First Plane * Beginners First Turns * The Stall Friends * Takeoffs Landings * Simple Aerobatics * Deadstick Landings * Flying High Winds * Advanced Aerobatics * Teaching Yourself Absolutely Have copy send $995 plus $100 postage handling CARROLL CONSULTING Box 3391 Arlington VA 22201 October 1989 157 Dont Fly Like Buy Book FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size & shape wheel pants custom Make Parts Vacuum Form Canopies Plome mmd $1 couplet kt TAD FIBERILASS SPECIALTIES 38624 Mt Kisco Dr Sterling l-lgts Ml 48310 PHONE 313421-6358 RUlED & HEAITREAIEO WIRE GEARS & CASAWES PHONE 313 978-2512
Edition: Model Aviation - 1989/10
Page Numbers: 56, 57, 153, 157
DAN BUNCHS Scorpion Major OldTimer Month time plane confused two English Keil Kraft kits later date Scorpion Scorpion Major latter two planes enlarged sim plified versions Scotty Murrays Answer Ive mentioned previous columns Scorpion Major kitted Bunch Model Airplane Co Los Angeles CA companion its engines see photo ad taken September 1938 issue Model Airplane News kit available June November 1936 Ill have say about shortly Much following information based information John Pond wrote Summer 1968 edition Engine Collectors Journal correspondence Joe Wagner Joseph Danner Bunch native Californian got model airplanes after starting career track full-scale aviationthe exact re verse route people era 1938 enrolled aeronautical engineering student Curtiss-Wright Technical Institute located Grand Central Air Terminal Glendale CA Like thousands other young men timeframe exploits Lindberg Chamberlain intense national interest anything airplanes strong influence him Un fortunately devastating economic upheaval 1929 made work hard findespecially aviation industry seemingly daily bank ruptcies affected few firms Although Dan Bunch both engineering degree commercial pilots license quickly apparent make living some other form work needed As possi ble means surviving Dan chose enter model airplane business first efforts rubber-powered kits appeared strongly influenced designs Gordon S Light time known internationally through pages Air Trails magazine Planes both designers fea Goal tVhw 8unch Model Airplane Co Los Angeles Ca SCORPION MAJOR Wlngspn 51 k Weight 21 Lb Dibdl 0141 cm TIp Rib blest Rudder SIshlilcee Rib Z1LI LI 0 folks Dan Bunchs 1936 Scorpion MajorDocs Old-Timer Month October tured long spidery landing gear lightweight successful competition outdated ap structures humongous rudders Yes pearance made obsolete time off another design sporting ludicrous rud- packaged placed shelves lo der Although Darfs designs flew quite well cal hobby dealers 4 SPEC IF CAT 0 N S Bonch Engines fall 1/5 h p 5250 rpm 4 p 8500 r p m Bore o ke 0 Bare weight flyc Engines assembled block-tented kits complete coil condenser fool tank Champion spark plug Engine kits supplied piston piston rings asd main searing fitted ready ran Also timer assembly set op points adjustOd MIGHTY-MIDGET iineiht Asbid $950 MIGHTY-MIDGET apriqsEit785 MIGHTY-MIDGET IermAbid 975 MIGHTY-MIDGET tnrtd Kit785 GWIN-AEEO 8priqhtAbiud1200 GwIN-AEEO aprihe Kit980 GWIH-AEEO tnrtdAbtd1250 GWIN-AEEO .rsud Kit985 flIGHTY MARINE A.btd 1250 MIGHTY MARINE ci1085 ao ens east pad Zoda% SdPattl m iIL j ii 4 P!I khsJ p JVb aI Heres ad September 1938 Model Airplane News Engines typical ones manufactured Bunch era long-remembered Bunch Tiger came out little later 56 Model Aviation Radio Conoi Old-Timers Dr DB Mathews 909 N Maize Rd Townhouse 734 Wichita KS 67212 Gerald Murphys Bunch Scorpion Major uses O&R 29 ignitionnote big rudder Jim Calahan De Soto MO Robert Burgess Louisville KY Super Buccaneer Like everyone days early start rather primitive back 1932 two years later things going well enough tiny firm began advertise national model mag azines about time electrifying activi ties Maxwell Basset Joe Kovel others gasoline-engine-powered models sweeping hobby Dan Bunch became terested possibilities producing en gine Among engine historians true enigma seems exist what role Harry Gwinn played capitalizing Bunch some have talked actually question whether such person really existed speculation Harry Gwinn may have nom de plume some relative Dans fact well documented however Dan Bunch produced number engine de signs quite successful Scorpion Major essentially designed match engine sold role chew old bone some cant help agree John Pond stated previ ously mentioned article Although have no reports Rubber designs flying abilities large rudder appears make designs ex tremely sensitive spiral diving tendencies speculation tendency spelled early demise Free Flight design reader has experience Bunch Scor pion Major Free Flight model would appre ciate having comments Now seaplane Scorpion Major rather successful Howard Braughton some others held national ROW rise-off-water Ed records design reason its success Simply float-equipped models re quire vertical fin area compensate Continued page 153 Agressor R F high quality balsa Plywood fwfly airplane Covered Monokote can easily repaired should need like foam ARFs Agressor very competitive Fun Fly events also available built order $14995 plus $iSP& H Just add engine tank$11995 radio go FlypbisSl2OOP&H CRENSHAW AERO RR 1 Box 121 Manifla IN 46150 317-398-6529 M-F till 400 pm CST 317525-9074 After 500 pm Weekends Scale Height 5 Width ht 6oz Price $1995 ea P&H $325 per item Calif resid add sales tax 209 224-41 70 October 1989 57 Aguinald DeQueiroz Recite Brazil Original Buccaneer Docs drawings Janu ary 1980 issue Model Airplane News HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 l4~reprQudto announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP bones Bill Knepps Buccaneer Stan dard Ready go 50 years after started building first three-view design Docs October 86 column 1/4 Scale Modelers ch Has Ended Look No Further Perfect Pilot Bust Comnietely finished equipped ready fly L... M9@ enterprises po box 5631 fresno calif 93755 49span 45length 04 channel trical wing Engine35-502cy45-654cy Red silver trim k cockpit still creeps now no other reason simply looks better looks good scores high HUMAN ERROR recent contest sev eral us watching flight amaz ing hear different opinions quality maneuver would have thought watching different airplanes Yes maybe problem people will detect errorsminor onesthat other people simply will see dont see errors scores will obviously higher folks have reputations being easy judges simply dont see errors Its because arent looking because dont see mistakes training problem really eyesight perception prob lem judges usually score very high upper classes mistakes small er rors also probably affected old buddy Halo Factor think youll agree Paul Verger will have very interesting Nats report Im looking ward reading RC Giant Scale/de Vries Continued page 55 way go found Radio Shack carries torch proper oxygen cylindersso Im back business usual schedule holds next month space will taken over Nats reports Back atcha December issue probably news big IMAA to-do Odessa TX RC Old-Timers/Mathews Continued page 57 lateral area floats So would appear quite accident Dan hit design wellsuited flying off waterbut red hot traditional flying anyone interested twin floats 20 long profile much like full-scale Edo floats bottom steps located planes CG 4i/2 wide supported three wire units attached fuselage bottom cross braces two spots tail float single 8 x 3-in unit having teardrop shape mounted directly below horizontal tail plane Scorpion Major kit withdrawn market Bunch concentrated produc ing engines Later made tethered race cars speedboat kit never again pro duced model airplane kits Hisengines continued mainstay com pany until suicide 1948 Scorpion Major RC-Assist model quote Gerald Murphy Herford TX Bunch Scorpion Major powered ignition O&R 29 flies better should really wanted after watching Eut Tileston fly times contestsa real contender looked like Old-Timer Rubber job engine has character gear legs built using six pieces balsa wheels balsa cores surgical tubing tires turned out about 6 oz overweight smaller batteries some other mods still 3 oz over shows difficult get smaller model down 10 oz/sq ft Continued page 1S7 LANDER INDUST 1005 19TH 5T CT VISA HAVAC MONTANA 59501 406-265-6529 BUILDING BOARD 24x72$5395NtLFRT 24x48$4495NcLFRT CANADIAN ORDERS ADD 25% Build straight spending fortune durable high density 1/2' pin surfate bonded 3/4' laminated warp free base straight true work surtace will last years years J * ***** * ****** * * * ** *** ** *** * * * * * WANDIT * N *Dealers Invited * *wile ysirwarranty *p * * or Dry 1OftCORD~ * * Stick Abrasives p *A KeenMachine gives ecceptional *sandingcontrol excellent finish * * 89Basic Ccl 1 flat Wand 1 *of 6 grits *10395Builder Special mcI 2 tlat hatt *round wand 5 6 grits *12995Deluxe includes 3 flat 2 half p *round wands 2 buff wands *tO 6 grits * *Addilionaf wands Abrasives available *See local hobby shop *WANDITOMFG. I44OS916O *p * P09515183Ddu1flt752sI51pp October 1989 153 L- 1 RC Old-Timers/Mathews Continued page 153 rule Scorpion tends balance nose-heavy CU should chord weight should close 10-oz rule possible Scorpion satisfying model build fly its thin wing airfoil has really good climbeven O&R 29 doesnt have power some repro 29s glide isnt good some floaters much faster outstanding windy weather Notice Jerry doesnt say anything about spiral stability Obviously radio installed Scorpion has something going Plans No 4E3 available John Pond OldTime Plan Service 253 No 4th St PO Box 90310 San Jose CA 95109-3310 An anatomical impossibility started make heading paragraph Wanna put Tiger Scorpion isnt sensible Herb WahI Box 61 Forksville PA 18616 cur rently manufacturing reproductions Bunch Tiger engine familiar Herbs previous Brown Ohlsson reproduc tions can attest quality work recommend him sky Tiger later Bunch engine looks much like Mighty Midget/Gwinn Aero shown reproduced ad Contact Herb WahI availability price reproductions Another option Forster 29 35 power plants being reproduced RJL Industries out California Forsters original casting dies being used new engines being ma chined modern computer-controlled units Both late-model front-intake ver sions engines however equipped original-style Forster ignition timers Phantom P-30 fuel tanks aspect oper ation find fascinating fact engines being boxed original re printed Forster boxes Fifties will clude original Forster instruction sheets Write RJL Industries PO Box 5 Sierra Madre CA 91024 telephone 1-818/359-0016 Now heres slow builder Back Sixties Seventies sons compet ing Nats level fun aspects Na tionals Scale cage Back 100 FF Scale entries placed chickenwire cage mounted risers handful RC Scale ships would too well lots CL Scale planes view first day meet until night before Scale event flown Since Navy host meet Scale cage usually hangar separate larger housed contestant workbenches model boxes Yes model competed Nats built right meet workbenches particularly Free Flights Both hangars full activity late hours night some modelers actually working entries night competition flights next day great fun unforgettable experience now long gone Nats chief judges event directors Free Flightand occasion ally CLevents wonderfully efficient friendly couple named Bill Irene Knepp Sons still recall fondly day As years have worn have managed keep touch Bill has frequently provided three-views full-scale aircraft rare would question authentic ity integrity source year ago Bill sent photo re cently completed Buccaneer Standard three-view column October 1986 following story Way back dim days September 1937 entered Gas model contest Scranton PA Bill Effinger Owner Berkeley Models small Buccaneer also new Super Buccaneer small interested said hed have kit Out few months t days really meant box full balsa strips sheet blocks builder took early 1938 sent kit began building However enlisted Navy May year sold partially completed Buc caneer Standard friends really never built few years ago ordered plans new version WE Technical Services sappointed beefed up structure much called Fox 40 power opinion would way too much So fi nally put drawings board traced outlines onto some clean paper drew own structure much along lines wrote about mounted 05 25 first flew last spring flies beautifully 5 lb OS turns 11 x 6 prop doesnt know difference close what dreamed about original started long ago So took Bill Knepp 50 years get Buc caneer Standard air Some us have started projects should have left trash man first place RC Electrics/Kopski Continued page 59 up find Out Conversely speed controls intended used fewer six cells pretty much have hard-wired receiver technical reasons latter fol low Speed controls use MOSFETs metal-oxide semiconductor field-effect transistorEd cho sen very low On-resistance low-R FETs need six volts little gate drive signal Normally gate signal comes motor-battery-powered speed-control electronics Speed controls intended used fewer six motor cells have utilize receiver battery way another add lower motor battery voltage make up necessary tal gate drive voltage What means such controls can t use optical coupling re ceiver its battery must hard-wired motor control electronics Now know some low-cell-count speed controls may glitch ier others Another speed control preference power control signal motor high rate rather frame rate now just want describe difference save reasons future column high-rate type control uses high switching rate power on/off proportionally control motor types typically produce audible sound motor itself easily recognized low throttle settings whine motor singing frame-rate types use basic transmitter signal frame timing usually around 50 Hz LEARNING TO FLY RADIO CONTROL MODEL AIRPLANES Book Taught Tens Thousands covers * Selecting First Plane * Beginners First Turns * The Stall Friends * Takeoffs Landings * Simple Aerobatics * Deadstick Landings * Flying High Winds * Advanced Aerobatics * Teaching Yourself Absolutely Have copy send $995 plus $100 postage handling CARROLL CONSULTING Box 3391 Arlington VA 22201 October 1989 157 Dont Fly Like Buy Book FIBERGLASS PARTS Over 237 cowls kit scratch built models Also over 34 round cowls ranging 4 14-7/8 diameter 55 diff size & shape wheel pants custom Make Parts Vacuum Form Canopies Plome mmd $1 couplet kt TAD FIBERILASS SPECIALTIES 38624 Mt Kisco Dr Sterling l-lgts Ml 48310 PHONE 313421-6358 RUlED & HEAITREAIEO WIRE GEARS & CASAWES PHONE 313 978-2512