Control Line Racing John Ballard PROPOSED RULES would put limitations Fast Slow Rat limiting engine dis placement 21 Cu situation has produced flurry letters telephone calls 95% have wanted engine sizes two events remain presently stand Control Line Racing group San Diego CA area summarized peoples feel ings indicating want . se keep 40-sized Rat alive since think worth effort just excitement expertonly 150 mph premier Racing event Howard Shahan has sent some Racing results October 18-19 CL contest held Whittier CA Howard indicates contest drew approximately 60 entries Racing events Mouse II North west Sport Race Fast Rat Scale Race Big Goodyear Slow Rat Some excellent times turned Fast Rat two-up finals first place being won Shahan/Fogg 444 140 laps after quali fying 70 laps 218 Scale Race won Akre team 624 some very good times Western colleagues indicated contestants came Canada Texas compete K&B/Cox 15 Conquest engine rework have several letters requesting information reworking Cox 15 since such economically-priced racing engine recently received engines modified Ron Young Performance Engines modifications extensive inter esting starters cylinder block has mounting-bolt holes countersunk now bolted directly crankcase before head attached cylinder head/clamp ring rotated 450 new holes drilled top cylinder block holes tapped head-mounting bolts modification alone eliminated hassle usually encountered trying remove cylinder head change gaskets alter head clearance also eliminated need large numbers shims between upper cylinder block area engine fitted Ron Young custom ABC piston liner assembly head also modified accept Nelson racing plug crankshaft has heat treated has threaded nose removed front shaft has drilled tapped fitted removable stud Ron has two crankshafts avail able standard another has larger internal intake passage claimed increase rpms about 500 photos show first-class workmanship modification sent Leo Wittenberg F-M Skylarks Model Club Fargo ND campalgned engine entire year excellent results no failures Fiberglass propeller failures Since Racing fraternity uses fiberglass carbon-fiber props important qualitycontrol units watched very closely During recent 86 Nats Lake Charles LA extremely hot air temperatures probably cause several propeller failures Fast Rat Slow Rat events majority props failed commerciallyproduced units However couple cases saw competitors produced own molds props have unfortunate eperi ence propeller coming loose shaft situation occurs frequently larger Rat/Slow Rat engines amount heat generated shaft area can cause immediate softening illprepared prop hub close observation competitors failed propellers should alert individual failure common particular brand prop other propellers such brand could suspect hub softening shedding some blade area thing certain attempts use freshly-prepared trick-pitched propellers should certainly receive trial run test stand good hot-running engine After careful inspection hub blades after test would fairly safe try prop flight several occasions have seen props after careful inspection showed evidence curing satisfactorilya condition caused ei ther lack oven-baking use inappro priate mixture catalyst resin An additional factor use proper amounts glass cloth and/or carbon fiber has added hub area blade during manufacture very critical dimen sional stability unit under heat stress Propeller manufacturers generally take great pains weighing up exactly right amount cloth roving used size propellers obtain maximum stability cured unit have seen sad results blade hub softening during race prop loosens grip engines prop hub allowing engine run free shaft run flight conse quence losing race expensive Rat engine Custom-made control handles Last fall Midwest CL meet noticed several Combat contestants using new custum-made handle made out piece bar stock aluminum plastic hand grip fitted neatly palm hand addition line-adjustment cables very heavy construction 4-40 Allen bolt used hold cable place Some other handles have little tabs holding line-adjustment cable position can easily break off new handle has cable being merely threaded through handle frame held place brass plate Continued page 161 Ron Voung-modif led K&B/Cox Conquest 15 shows modified upperbiock matestothe crankcasewithOUtthe use numerous shims L sharp eye will note cylinder head has rotated 450 stock position R modified accept Nelson racing plug engine raced whole season Leo Wittenberg Fargo ND outstanding reliability info column 66 Model Aviation Custom-made control handle features bar stock aluminum frame plastic hand grip heavy-duty lead-out cable positive easily adjustable neutral position John likes Cycle its est. OPS 12 over head cam shaft four cycle engine have waiting features needle bearing rod ABC piston sleeve ring slide valve carb automotive type cam valves muffler other features See now local hobby shop SThe P Orleans LA 70186 242-5967 countrys top Scale builders appears current team-selection format has lived up hoped-for expectations either participation producing world championship-winning team Bill Force East Coast group feel time has come change time place team-selection selection event should such countrys Scale builders afforded chance participating One option has suggested past being suggested again js trials held connection Nats An FAI Scale event has included Nats program past few years wouldnt require changes event administration turn normally-flown event team-trial event minimum three judges static well flying required present Nats format gen erally has three judges static two flying circle would mean increase circle judge team-selection event Closer attention weight engine displacement limits would required well enforcing FAI requirements maximum wing loading models entered Incorporating team-selection event Nats would likely away much dissatisfaction being voiced about being able participate because separate events other reasons noted above Also event would move about country Nats moves bringing event larger number Scale participants Another benefit might larger numbers spectators would exposed team-selection efforts While comments express general feel ings arid position East Coast group re ported Scale modelers about country should heard topic have opinion either against issue urge make opinions known districts Team Selection Committee member dont know contact AMA HQs Competition Department John Guenther NASA president Team Selec tion Committee chairman will find ad dress Competition Directory section Competition Newsletter months Issue A closing note interested par ticipating FAt team-selection event 1987 sure read follow program entry structions Competition Newsletter sec tion January 1987 issue MA page 119 se send correspondenceand especially photos relating CL Scaleto Bill Boss 77-06 269th St New Hyde Park NY 11040 acing/Ballard Continued page 66 turn secured 4-40 bolt Loosening bolt allows cable slid back forth adjust control alignment after bolt re-tightened understand handle will sold through Wizard Hole Racing lla 15 21 35 racing engines Mr Doc Passen has contact about effort made Cipolla company Italy produce economically-priced Racing Combat engines Doc indicates com pany will bring out new 35 36 CL side- exhaust plain-bearing engine can used Sport Race addition Cipolla presently updating its 15 rear-exhaust Free Flight Racing engine Mr Gino Di Voghera engine designer Competition Cipolla has produced excellent Team Race engine took fifth place recent World Championships will designing 35 Midwest Sport Racing engine supposed weigh 5-6-ounce range Should AMA rules require 21-size engines Fast Slow Rat Cipolla already produces size use -scale Gas cars I have written Doc asking engines testing providing receive comparison present typical Racing en gines results will reported As always solicit comments photos ideas March 1987 161 Four John C Ballard 10102 Kimblewick Dr Louisville KY 40223 1K Folding wThgU AJ lNTERCEPTOR4e9S complete U-build Kit photos easy instructions 0031 FLEASE *00 $300 FOE FOOTAGE * 0*00100 F EST FOOF EU 10 s *00 FN FEECEMI OF ERIC FOE EACH 0000 00*1 JUPS AIRCRAFT COMPANY RO Box 68132 Portland OR 97268
Edition: Model Aviation - 1987/03
Page Numbers: 66, 161
Control Line Racing John Ballard PROPOSED RULES would put limitations Fast Slow Rat limiting engine dis placement 21 Cu situation has produced flurry letters telephone calls 95% have wanted engine sizes two events remain presently stand Control Line Racing group San Diego CA area summarized peoples feel ings indicating want . se keep 40-sized Rat alive since think worth effort just excitement expertonly 150 mph premier Racing event Howard Shahan has sent some Racing results October 18-19 CL contest held Whittier CA Howard indicates contest drew approximately 60 entries Racing events Mouse II North west Sport Race Fast Rat Scale Race Big Goodyear Slow Rat Some excellent times turned Fast Rat two-up finals first place being won Shahan/Fogg 444 140 laps after quali fying 70 laps 218 Scale Race won Akre team 624 some very good times Western colleagues indicated contestants came Canada Texas compete K&B/Cox 15 Conquest engine rework have several letters requesting information reworking Cox 15 since such economically-priced racing engine recently received engines modified Ron Young Performance Engines modifications extensive inter esting starters cylinder block has mounting-bolt holes countersunk now bolted directly crankcase before head attached cylinder head/clamp ring rotated 450 new holes drilled top cylinder block holes tapped head-mounting bolts modification alone eliminated hassle usually encountered trying remove cylinder head change gaskets alter head clearance also eliminated need large numbers shims between upper cylinder block area engine fitted Ron Young custom ABC piston liner assembly head also modified accept Nelson racing plug crankshaft has heat treated has threaded nose removed front shaft has drilled tapped fitted removable stud Ron has two crankshafts avail able standard another has larger internal intake passage claimed increase rpms about 500 photos show first-class workmanship modification sent Leo Wittenberg F-M Skylarks Model Club Fargo ND campalgned engine entire year excellent results no failures Fiberglass propeller failures Since Racing fraternity uses fiberglass carbon-fiber props important qualitycontrol units watched very closely During recent 86 Nats Lake Charles LA extremely hot air temperatures probably cause several propeller failures Fast Rat Slow Rat events majority props failed commerciallyproduced units However couple cases saw competitors produced own molds props have unfortunate eperi ence propeller coming loose shaft situation occurs frequently larger Rat/Slow Rat engines amount heat generated shaft area can cause immediate softening illprepared prop hub close observation competitors failed propellers should alert individual failure common particular brand prop other propellers such brand could suspect hub softening shedding some blade area thing certain attempts use freshly-prepared trick-pitched propellers should certainly receive trial run test stand good hot-running engine After careful inspection hub blades after test would fairly safe try prop flight several occasions have seen props after careful inspection showed evidence curing satisfactorilya condition caused ei ther lack oven-baking use inappro priate mixture catalyst resin An additional factor use proper amounts glass cloth and/or carbon fiber has added hub area blade during manufacture very critical dimen sional stability unit under heat stress Propeller manufacturers generally take great pains weighing up exactly right amount cloth roving used size propellers obtain maximum stability cured unit have seen sad results blade hub softening during race prop loosens grip engines prop hub allowing engine run free shaft run flight conse quence losing race expensive Rat engine Custom-made control handles Last fall Midwest CL meet noticed several Combat contestants using new custum-made handle made out piece bar stock aluminum plastic hand grip fitted neatly palm hand addition line-adjustment cables very heavy construction 4-40 Allen bolt used hold cable place Some other handles have little tabs holding line-adjustment cable position can easily break off new handle has cable being merely threaded through handle frame held place brass plate Continued page 161 Ron Voung-modif led K&B/Cox Conquest 15 shows modified upperbiock matestothe crankcasewithOUtthe use numerous shims L sharp eye will note cylinder head has rotated 450 stock position R modified accept Nelson racing plug engine raced whole season Leo Wittenberg Fargo ND outstanding reliability info column 66 Model Aviation Custom-made control handle features bar stock aluminum frame plastic hand grip heavy-duty lead-out cable positive easily adjustable neutral position John likes Cycle its est. OPS 12 over head cam shaft four cycle engine have waiting features needle bearing rod ABC piston sleeve ring slide valve carb automotive type cam valves muffler other features See now local hobby shop SThe P Orleans LA 70186 242-5967 countrys top Scale builders appears current team-selection format has lived up hoped-for expectations either participation producing world championship-winning team Bill Force East Coast group feel time has come change time place team-selection selection event should such countrys Scale builders afforded chance participating One option has suggested past being suggested again js trials held connection Nats An FAI Scale event has included Nats program past few years wouldnt require changes event administration turn normally-flown event team-trial event minimum three judges static well flying required present Nats format gen erally has three judges static two flying circle would mean increase circle judge team-selection event Closer attention weight engine displacement limits would required well enforcing FAI requirements maximum wing loading models entered Incorporating team-selection event Nats would likely away much dissatisfaction being voiced about being able participate because separate events other reasons noted above Also event would move about country Nats moves bringing event larger number Scale participants Another benefit might larger numbers spectators would exposed team-selection efforts While comments express general feel ings arid position East Coast group re ported Scale modelers about country should heard topic have opinion either against issue urge make opinions known districts Team Selection Committee member dont know contact AMA HQs Competition Department John Guenther NASA president Team Selec tion Committee chairman will find ad dress Competition Directory section Competition Newsletter months Issue A closing note interested par ticipating FAt team-selection event 1987 sure read follow program entry structions Competition Newsletter sec tion January 1987 issue MA page 119 se send correspondenceand especially photos relating CL Scaleto Bill Boss 77-06 269th St New Hyde Park NY 11040 acing/Ballard Continued page 66 turn secured 4-40 bolt Loosening bolt allows cable slid back forth adjust control alignment after bolt re-tightened understand handle will sold through Wizard Hole Racing lla 15 21 35 racing engines Mr Doc Passen has contact about effort made Cipolla company Italy produce economically-priced Racing Combat engines Doc indicates com pany will bring out new 35 36 CL side- exhaust plain-bearing engine can used Sport Race addition Cipolla presently updating its 15 rear-exhaust Free Flight Racing engine Mr Gino Di Voghera engine designer Competition Cipolla has produced excellent Team Race engine took fifth place recent World Championships will designing 35 Midwest Sport Racing engine supposed weigh 5-6-ounce range Should AMA rules require 21-size engines Fast Slow Rat Cipolla already produces size use -scale Gas cars I have written Doc asking engines testing providing receive comparison present typical Racing en gines results will reported As always solicit comments photos ideas March 1987 161 Four John C Ballard 10102 Kimblewick Dr Louisville KY 40223 1K Folding wThgU AJ lNTERCEPTOR4e9S complete U-build Kit photos easy instructions 0031 FLEASE *00 $300 FOE FOOTAGE * 0*00100 F EST FOOF EU 10 s *00 FN FEECEMI OF ERIC FOE EACH 0000 00*1 JUPS AIRCRAFT COMPANY RO Box 68132 Portland OR 97268