CONTROL LINE SCALE fj P-39Q COBRA II two Airacobras flown mid 1940s Cleveland Air Races Cobra flown Jack Woolsams August 1946 lost above Lake Ontario after qualifying Cleveland Air Races P-39Q Cobra II flown Tex Johnston qualified same 1946 races went win Thompson Trophy Both models stripped military components lightened given better-rated engines original three-bladed propellers replaced four-bladed props Cobra II raced again 1947 1948 reached 471 mph 1948 flown after until 1969 crashed during attempt break propeller-driven speed record Wiring used control electric servos gear retraction flap actuation Scrozyks Cobra II P-39Q Cobra II shown month work Joe Scrozyk Philadelphia PA has operating systems include Rhom Air Retracts flaps throttle control model built vintage lop Elite Kit powered Fox 78 engine Joe noted kit current lop Elite offerings about 25 years old Model control via combination standard three-line US belicrank handle throttle control flap Rohm Air gear retraction systems controlled electric servos Although Joes model built Sport Scale no points awarded cockpit details dressed up full cockpit details including operating doors type detail enhances appearance Scale model Servos used operating flaps gear retraction regular Radio Control servos electroaics removed leaving servo motor driven directly battery supply Joe mounted two Double Pole Double Throw DPDT momentary operating miniswitches small aluminum box attached standard three-line handle insulated flying lines made nylon-covered stainless-steel fishing leader used Scale modelers single- multichannel electronic systems No mention made line size varies size weight individual model leader material generally available fishing tackle shops mail-order houses such Netcraft Box 89 Maumee OH 43537 choosing line size keep mind AIVIA pull-test line-size requirements models weight instance 80-pound test line have used has steel core 026 outside covering measurement 035 sure obtain covered line right size inner core covered lines advertised using outside diameter line covering method making line terminations insulated lines see March 1991 column switch box 4 x 21/8 x li/s momentary DPDT miniswitches can obtained local Radio Shack other electronics store box mounted US handle removing two front screws handle replacing slightly longer screws switch box could have smaller size indicated used battery supply could included makes neat installation does away need long connections external battery located belt no need on/off switch system self centering momentary operating DPDT switches always off position last major item battery supply Joe used three 9-volt batteries series 27-volt supply necessary overcome resistance voltage drop flying lines provide necessary voltage current required proper operation servos inclined try system Joe used experiment size battery supply voltage depends type size servos length diameter flying wire no travel limits servos type system care must observed during operation system observation flaps landing gear required see operation has completed Short momentary operation switches would required accompanying sketch shows wiring used system great importance fact operation should performed time switches operated simultaneously short circuit will applied across battery supply use servos whether battery operated through electroaics becoming popular among Control Line CL Scale modelers provide us means make Scale models operating features perform individual realistic manner have unique way using servos operating model features send idea Others might like read about New Videos youre interested P-Si Mustang Harding Aero Productions distributing 60-minute video Escort P-Si Mustang covers aircrafts development action over Germany bomber escort championship racing Reno 118 Model Aviation S RVO #1 FLYING LINES 1 DPDT Oj2 GEAR Joe Scrozyks Cobra II Highly modified P-39Q 1946 Cleveland Air Races Thompson Trophy winner Weighs 1 31h pounds Modified GS three-line handle holds switch box operates servos control P-390s flaps gear retraction Also available Introduction Control Line Flying Building Aimed CL newcomer might nice addition club library showing new members presenting scout meetings schools might also good item clubs donate local library way interest others videos cost $1995 plus $3 shipping handling can obtained Harding Aero Productions 4782 Unity Line Rd New Waterford OH 44445 Tel [330] 457-1600 Workshop Hints problem using gap-filling cyanoacrylate CyA glue tip clogs after use solution buy package extra tips rather mutilating stopped up put tightly-capped jar such baby food jar filled acetone acetone will dissolve CyA next day leaving tip good new Put new cap just-used CyA bottle Make sure tip thoroughly dry free acetone before using again Acetone can fire hazard improperly handled treat such Eye protection good work-area ventilation highly recommended tip found Orange County R/C Club Eagle Newsletter 1997 Directory Model Aviation CL Scale Items January Notes NASA National Association Scale Aeromodelers Competition Committee big too big Workshop hintbox tissues workshop February paint pilot figures Plans enlargement service Field tipfuel filler overflow reservoir March Overseas MallNorthrop Gamma Karl Georg Krafft Documentation problems Contest ActivityGSCB Ganlen State Circle Burners annual Scale meet April 1996 World Competition Southeastern ctates contest activity Workshop hintCyA glues eyeglasses Book reviewWarbird Tech Series May Four-line control system West Coast contest activity Pre-flying season equipment check June Getting started CL Scale July Comments PAl Federation Aeronautique Intemationale World Competition August Trimming CL Scale models gmund handling Workshop hintuse vinyl rain downpour spouts wood storage Book reviewGhosts Vintage Aircraft World War II Contest ActivityChoila Choppers GSCB September 1999 CL Scale rules proposals Overseas mail Poland Wofirshop hintopening screw-top paint bottles Contest ActivitySebree Hayes Skyliners Annuals October Test flying CL Scale models Part 1950s plans available Workshop hintkeep saw dust off scroll saw work November Test flying CL Scale models Part II Workshop hintdishpan storage bins Book reviewConcise Guide Aris Aircraft WWII Wise Owl World Wide Publications December Nationals competition coverage Please send ideas notice upeoming CL Scale events contest reports especially photos CL Scale activity address very top column 4January1998 119
Edition: Model Aviation - 1998/01
Page Numbers: 118, 119
CONTROL LINE SCALE fj P-39Q COBRA II two Airacobras flown mid 1940s Cleveland Air Races Cobra flown Jack Woolsams August 1946 lost above Lake Ontario after qualifying Cleveland Air Races P-39Q Cobra II flown Tex Johnston qualified same 1946 races went win Thompson Trophy Both models stripped military components lightened given better-rated engines original three-bladed propellers replaced four-bladed props Cobra II raced again 1947 1948 reached 471 mph 1948 flown after until 1969 crashed during attempt break propeller-driven speed record Wiring used control electric servos gear retraction flap actuation Scrozyks Cobra II P-39Q Cobra II shown month work Joe Scrozyk Philadelphia PA has operating systems include Rhom Air Retracts flaps throttle control model built vintage lop Elite Kit powered Fox 78 engine Joe noted kit current lop Elite offerings about 25 years old Model control via combination standard three-line US belicrank handle throttle control flap Rohm Air gear retraction systems controlled electric servos Although Joes model built Sport Scale no points awarded cockpit details dressed up full cockpit details including operating doors type detail enhances appearance Scale model Servos used operating flaps gear retraction regular Radio Control servos electroaics removed leaving servo motor driven directly battery supply Joe mounted two Double Pole Double Throw DPDT momentary operating miniswitches small aluminum box attached standard three-line handle insulated flying lines made nylon-covered stainless-steel fishing leader used Scale modelers single- multichannel electronic systems No mention made line size varies size weight individual model leader material generally available fishing tackle shops mail-order houses such Netcraft Box 89 Maumee OH 43537 choosing line size keep mind AIVIA pull-test line-size requirements models weight instance 80-pound test line have used has steel core 026 outside covering measurement 035 sure obtain covered line right size inner core covered lines advertised using outside diameter line covering method making line terminations insulated lines see March 1991 column switch box 4 x 21/8 x li/s momentary DPDT miniswitches can obtained local Radio Shack other electronics store box mounted US handle removing two front screws handle replacing slightly longer screws switch box could have smaller size indicated used battery supply could included makes neat installation does away need long connections external battery located belt no need on/off switch system self centering momentary operating DPDT switches always off position last major item battery supply Joe used three 9-volt batteries series 27-volt supply necessary overcome resistance voltage drop flying lines provide necessary voltage current required proper operation servos inclined try system Joe used experiment size battery supply voltage depends type size servos length diameter flying wire no travel limits servos type system care must observed during operation system observation flaps landing gear required see operation has completed Short momentary operation switches would required accompanying sketch shows wiring used system great importance fact operation should performed time switches operated simultaneously short circuit will applied across battery supply use servos whether battery operated through electroaics becoming popular among Control Line CL Scale modelers provide us means make Scale models operating features perform individual realistic manner have unique way using servos operating model features send idea Others might like read about New Videos youre interested P-Si Mustang Harding Aero Productions distributing 60-minute video Escort P-Si Mustang covers aircrafts development action over Germany bomber escort championship racing Reno 118 Model Aviation S RVO #1 FLYING LINES 1 DPDT Oj2 GEAR Joe Scrozyks Cobra II Highly modified P-39Q 1946 Cleveland Air Races Thompson Trophy winner Weighs 1 31h pounds Modified GS three-line handle holds switch box operates servos control P-390s flaps gear retraction Also available Introduction Control Line Flying Building Aimed CL newcomer might nice addition club library showing new members presenting scout meetings schools might also good item clubs donate local library way interest others videos cost $1995 plus $3 shipping handling can obtained Harding Aero Productions 4782 Unity Line Rd New Waterford OH 44445 Tel [330] 457-1600 Workshop Hints problem using gap-filling cyanoacrylate CyA glue tip clogs after use solution buy package extra tips rather mutilating stopped up put tightly-capped jar such baby food jar filled acetone acetone will dissolve CyA next day leaving tip good new Put new cap just-used CyA bottle Make sure tip thoroughly dry free acetone before using again Acetone can fire hazard improperly handled treat such Eye protection good work-area ventilation highly recommended tip found Orange County R/C Club Eagle Newsletter 1997 Directory Model Aviation CL Scale Items January Notes NASA National Association Scale Aeromodelers Competition Committee big too big Workshop hintbox tissues workshop February paint pilot figures Plans enlargement service Field tipfuel filler overflow reservoir March Overseas MallNorthrop Gamma Karl Georg Krafft Documentation problems Contest ActivityGSCB Ganlen State Circle Burners annual Scale meet April 1996 World Competition Southeastern ctates contest activity Workshop hintCyA glues eyeglasses Book reviewWarbird Tech Series May Four-line control system West Coast contest activity Pre-flying season equipment check June Getting started CL Scale July Comments PAl Federation Aeronautique Intemationale World Competition August Trimming CL Scale models gmund handling Workshop hintuse vinyl rain downpour spouts wood storage Book reviewGhosts Vintage Aircraft World War II Contest ActivityChoila Choppers GSCB September 1999 CL Scale rules proposals Overseas mail Poland Wofirshop hintopening screw-top paint bottles Contest ActivitySebree Hayes Skyliners Annuals October Test flying CL Scale models Part 1950s plans available Workshop hintkeep saw dust off scroll saw work November Test flying CL Scale models Part II Workshop hintdishpan storage bins Book reviewConcise Guide Aris Aircraft WWII Wise Owl World Wide Publications December Nationals competition coverage Please send ideas notice upeoming CL Scale events contest reports especially photos CL Scale activity address very top column 4January1998 119