Control Line Scale Bill Boss PERSEVERANCE dont succeed first try again appears mail received concerning August September columns CG balance lead-out position ing pretty well-read mail supportive material pre sented couple letters Paul Burke Palmdale CA another Tom Dixon Atlanta GA did point out could have specific technical couple areas presentation After reviewing both column letters realized what presented models CG wasnt quite clear enough thanks Paul Tom comments Ill try put some words together provide better picture Id like start quoting Pauls definition CG respect models believe will put us right track CG center gravity concept represents position model can used calculate forces such gravity act structure has no always location Take motor out CG will move toward tail Take tail off CG moves toward nose represents theoretical spot weight structure concentrated its used things like calculating forces balancing Its point along longitudinal axis aircraft balances its current configuration complete Paul goes indicate CG conventionally-configured models general ly located point 25 30 percent wing chord measured leading edge point used attain fore-and-aft balance model build kits plans will usually find designer has designated CG point based models structure weight designated engine size etc Next both Paul Tom pointed out another very important relationship between Bill expounds month subject mount belicrank Lead out exitposition wing affects whether model will yaw left right flight point lead-outs exit wing tip models CG position relation ship can govern whether CL model will track properly flight See sketch Before getting details sketch let say presented illustrate principle involved dictate bellcrank should mounted will agree bellcrank position shown likely conventionally-configured models doesnt necessarily have way Theoretically could bellcrank could find way route lead-outs through wing fuselage connect directly elevator control horn manner would withstand pull test stresses flight Details sketch position lead outs neutral position respect CG practical purposes model should track properly around circle ever position line drag can cause model yaw toward left turn can cause model fly little no line tension possibly fly circle Position B lead-outs would create worst-possible situation would line drag factor positioning lead-out exit point effect forward CG line put model extreme left yaw position maintaining proper flight attitude comes almost impossible position wouldnt able generate line tension required keep model out its proper flight path Position C lead-out exit position behind CG line 30 60 line rack considered adequate will cause model properly balanced flying speed SKETCH-B Charles NeeleyVisalia CA submitted idea response Bills October 86 col umn Use two wing tips permits mod eler present clean plane no lead outs showing forstaticiudging replacethe tip slotted lead outs flying info column yaw right overcoming line drag will also provide proper line tension Using line rack will allow reduce rudder offset minimum eliminating need engine offset Scale models Combining lead-out exit position C proper model balancing installation and/or support lead-outs outlined September column should provide good flying characteristics subject lead-outs Charles McNeeley Visalia CA responded Sep tember column sketch showings good way conceal lead-outs during static judging idea new fact according McNeeleys report idea used James McCorskey three-time Nats-winning P-S 1H back mid-Fifties As can see sketch false fully-Scale wing tip employed hide flexible lead-outs during static judging flying wing tip appropriate lead-out holes installed after static judging completed Mini contest report New York Scale Team held Third Annual Scale Contest Flush ing Meadow Park NY July 13 1986 ficials years event Pete Bianchinni Ed Robinson myself As has case NY Scale Team meets weather poor didnt have downpour past years cloudy misty day spite weather 12 entries total Sport Precision Profile classes Sam Abdow came way Fall River MA several veteran Scale fliers Garden State Circle Burners NJ hand competition Two contestants Rich Turello Ridge Continued page 166 December 1986 67 SKETCHA Sam Abdow L travelled NY Scale Team annual Scale meet Fall River MA Assisting Sam scratch-built P-47 is Scale Team member Ed Robinson Hastings NY Plane won CL Sport Scale 85 Nats Power NB 61 Profile Scale event recently introduced NY/NJ area Garden State Circle Burners club fine Grumman Guardian George Gaydos Elmwood Park NJ second-place winner Pete Hermans Whippany NJ well-execut ed Profile Scale Bell P-39 won third place first-ever Scale contest entry RADIO SOUTH K Os OS 25 FP 0525 FSR OS4OFP OS4OFSR OS2OFC OS4OFC 0S61 FC OS9OFC 4250 5750 4950 8350 8950 10950 14350 17250 ACE Field Charger Chargemaster Dual Charger 12V Charger Voitmaster Tachmaster 4-20 Kit 4-40 Kit 4-60 Kit 3450 3950 3950 2750 2750 3150 3350 4150 5550 FUTABA FP-2NL5700 FP-2PKA-S289000 FP-4NL-S3810700 FP-4NL-S3312200 FP-5F6K AM16900 FP-5F6K FM18500 FP-7F6K AM19900 FP-7F6K FM21500 Also Carry Ooldberg Duhn, MAC Zinger K & B Rocket City Dave Brown much mere Orders COD VISA MC ge actual UPS chargesOPEN 10 6 EST904 478-6745 No handling charges es subject change notice 43W Nine Mile Rd Pensacola FL 32414 lubricate causing ring hydro plane Use liberal amounts oil hone measured 30 seconds time stopping time clean inspect cylinder walls Constantly work cylinder in-and-out figure-eight pattern achieve uniform honing pattern Since rings nearly new test validity theory did replace merely cleaned otT visible varnish buildup left pistons reassembled engines ran bit block put back work three have proven trouble-free dependable very powerful no guarantees business have great confidence value modification especially Supertigres having inconsistent runs such have described engine fails respond traditional cures plugs needle settings etc give try fact shoulda tried four-cycles before sold em Dam Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Scale/Boss Continued page 67 wood NY Pete Hermans Whippany NJ first-time entrants Scale competition Richs Sport Scale P-5 1 finished third seen October column Pete Hermans also finished third Profile P-39 shown month can hope maybe next year weather will cooperate turnout will much better Please send correspondenceand espe cially photosrelating CL Scale Bill Boss 77-06 269 Street New Hyde Park NY 11040 CL Combat/Johnson Continued page 68 high win-minus-loss system pos sible would give truly accurate picture top fliers winning percentages Probably re suIts would change very little regardless system used bunch things have delayed getting Top 20 Bladder Grabber winners print Both deadline-date submitting column need publish 86 Nats stories have caused delay Well youve seen Top 20 now Ill turn Bladder Grabber certainly Big Daddy Combat meets What 48 entrants over country flying tripleelimination contest $8000 prizes BG news Almost 160 matches flown between noon Saturday Sunday evening very few problems couple rematches John Salvin Event Director receives high marks fine job weather touch rainy moderate temperatures Oh want winners Michael Willcox defeated Open fliers came away enough Carver Corp stereo equipment make papa Pat Willcox have rewire house Michael has learned right moves really deserved win look Nats results youll see Michael flew Open contestants placed several events Fellow Texan Richard Stubblefield placed second behind kid Howard Rush third followed another Northwest flier John Thompson Mike Petri San Francisco area placed fifth People seem keep coming back year after year years entry list about double Nationals Fox Mfg sent half-dozen new Four-Cycle Special glow plugs testing Al though theyre designed use four-stroke engines claimed very good twostrokers too slipped two plugs goodrunning Slow Combat engines Nats unsuspecting owners never noticed good engines kept running before weekend Ill find some bad-running engines try plug Weve flameout-runs burbles outside ma neuvers good engine will run plug youve realigned pin poor engine usually wont make unless battery permanently attached plug other product very nice control handle Sagan Industries call Pro-Grip works well comfortable hand doesnt break toss asphalt Its also possible get double-banded grip fly Racing events poorlytrimmed Combat models pull lot Im really used feel Hot Rock handle took little getting used much better start other handle knife-edge grip Hot Rock handles have out production bunch years line spacing handle can reduced AA flying training new pilots Both plugs handle look like good things try should available through normal dealers look ad MACA Newsletter Fanfare please now event Everyman Stealth Combat Stealth Bombers big thing now although guess Stealth Combat model would give Event Director fits trying find crash concept local flying unofficial Combat grassroots level model can Slow Combat model everyone area has access may Cartier SC-2 Flite Streak Phantom number good-flying airplanes wing has fairly good-sized because going add some accessories Regardless model chosen everyone must use exact same design power plant dry weights mustbe same engine should mildly-tuned Stunt-type muffler thats what makes Stealth Most manufacturers make nice engine/muffler com bination similar 05 35 Use nylon props very mild fuel two-wheel gear can use stooge release model solo flying during matches friend Most people Ive told about concept have immediately thought ways hop-up combination Dont think about extracting performance Instead try make models dead Theoretically slightly better pilot would take full five minutes chase opponent finally get cut two Model engine performance wouldnt have anything winning matches pilot skill cunning patience would everything So far just concept have couple SC-2s 05 35 K&B try muffler will way well able fly type Combat plane metropolitan area think Ill further disguise some tassels like put kitesand maybe stationary kite two air camou flageContinued page 168 166Model Aviation Al SANYO Batteries AA 500 maea 245 1ASC 600 maea 365 800 maea 375 SC 1200 maea385 500 ma Pack 48B975 1200 ma Pack48V1975
Edition: Model Aviation - 1986/12
Page Numbers: 67, 166
Control Line Scale Bill Boss PERSEVERANCE dont succeed first try again appears mail received concerning August September columns CG balance lead-out position ing pretty well-read mail supportive material pre sented couple letters Paul Burke Palmdale CA another Tom Dixon Atlanta GA did point out could have specific technical couple areas presentation After reviewing both column letters realized what presented models CG wasnt quite clear enough thanks Paul Tom comments Ill try put some words together provide better picture Id like start quoting Pauls definition CG respect models believe will put us right track CG center gravity concept represents position model can used calculate forces such gravity act structure has no always location Take motor out CG will move toward tail Take tail off CG moves toward nose represents theoretical spot weight structure concentrated its used things like calculating forces balancing Its point along longitudinal axis aircraft balances its current configuration complete Paul goes indicate CG conventionally-configured models general ly located point 25 30 percent wing chord measured leading edge point used attain fore-and-aft balance model build kits plans will usually find designer has designated CG point based models structure weight designated engine size etc Next both Paul Tom pointed out another very important relationship between Bill expounds month subject mount belicrank Lead out exitposition wing affects whether model will yaw left right flight point lead-outs exit wing tip models CG position relation ship can govern whether CL model will track properly flight See sketch Before getting details sketch let say presented illustrate principle involved dictate bellcrank should mounted will agree bellcrank position shown likely conventionally-configured models doesnt necessarily have way Theoretically could bellcrank could find way route lead-outs through wing fuselage connect directly elevator control horn manner would withstand pull test stresses flight Details sketch position lead outs neutral position respect CG practical purposes model should track properly around circle ever position line drag can cause model yaw toward left turn can cause model fly little no line tension possibly fly circle Position B lead-outs would create worst-possible situation would line drag factor positioning lead-out exit point effect forward CG line put model extreme left yaw position maintaining proper flight attitude comes almost impossible position wouldnt able generate line tension required keep model out its proper flight path Position C lead-out exit position behind CG line 30 60 line rack considered adequate will cause model properly balanced flying speed SKETCH-B Charles NeeleyVisalia CA submitted idea response Bills October 86 col umn Use two wing tips permits mod eler present clean plane no lead outs showing forstaticiudging replacethe tip slotted lead outs flying info column yaw right overcoming line drag will also provide proper line tension Using line rack will allow reduce rudder offset minimum eliminating need engine offset Scale models Combining lead-out exit position C proper model balancing installation and/or support lead-outs outlined September column should provide good flying characteristics subject lead-outs Charles McNeeley Visalia CA responded Sep tember column sketch showings good way conceal lead-outs during static judging idea new fact according McNeeleys report idea used James McCorskey three-time Nats-winning P-S 1H back mid-Fifties As can see sketch false fully-Scale wing tip employed hide flexible lead-outs during static judging flying wing tip appropriate lead-out holes installed after static judging completed Mini contest report New York Scale Team held Third Annual Scale Contest Flush ing Meadow Park NY July 13 1986 ficials years event Pete Bianchinni Ed Robinson myself As has case NY Scale Team meets weather poor didnt have downpour past years cloudy misty day spite weather 12 entries total Sport Precision Profile classes Sam Abdow came way Fall River MA several veteran Scale fliers Garden State Circle Burners NJ hand competition Two contestants Rich Turello Ridge Continued page 166 December 1986 67 SKETCHA Sam Abdow L travelled NY Scale Team annual Scale meet Fall River MA Assisting Sam scratch-built P-47 is Scale Team member Ed Robinson Hastings NY Plane won CL Sport Scale 85 Nats Power NB 61 Profile Scale event recently introduced NY/NJ area Garden State Circle Burners club fine Grumman Guardian George Gaydos Elmwood Park NJ second-place winner Pete Hermans Whippany NJ well-execut ed Profile Scale Bell P-39 won third place first-ever Scale contest entry RADIO SOUTH K Os OS 25 FP 0525 FSR OS4OFP OS4OFSR OS2OFC OS4OFC 0S61 FC OS9OFC 4250 5750 4950 8350 8950 10950 14350 17250 ACE Field Charger Chargemaster Dual Charger 12V Charger Voitmaster Tachmaster 4-20 Kit 4-40 Kit 4-60 Kit 3450 3950 3950 2750 2750 3150 3350 4150 5550 FUTABA FP-2NL5700 FP-2PKA-S289000 FP-4NL-S3810700 FP-4NL-S3312200 FP-5F6K AM16900 FP-5F6K FM18500 FP-7F6K AM19900 FP-7F6K FM21500 Also Carry Ooldberg Duhn, MAC Zinger K & B Rocket City Dave Brown much mere Orders COD VISA MC ge actual UPS chargesOPEN 10 6 EST904 478-6745 No handling charges es subject change notice 43W Nine Mile Rd Pensacola FL 32414 lubricate causing ring hydro plane Use liberal amounts oil hone measured 30 seconds time stopping time clean inspect cylinder walls Constantly work cylinder in-and-out figure-eight pattern achieve uniform honing pattern Since rings nearly new test validity theory did replace merely cleaned otT visible varnish buildup left pistons reassembled engines ran bit block put back work three have proven trouble-free dependable very powerful no guarantees business have great confidence value modification especially Supertigres having inconsistent runs such have described engine fails respond traditional cures plugs needle settings etc give try fact shoulda tried four-cycles before sold em Dam Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Scale/Boss Continued page 67 wood NY Pete Hermans Whippany NJ first-time entrants Scale competition Richs Sport Scale P-5 1 finished third seen October column Pete Hermans also finished third Profile P-39 shown month can hope maybe next year weather will cooperate turnout will much better Please send correspondenceand espe cially photosrelating CL Scale Bill Boss 77-06 269 Street New Hyde Park NY 11040 CL Combat/Johnson Continued page 68 high win-minus-loss system pos sible would give truly accurate picture top fliers winning percentages Probably re suIts would change very little regardless system used bunch things have delayed getting Top 20 Bladder Grabber winners print Both deadline-date submitting column need publish 86 Nats stories have caused delay Well youve seen Top 20 now Ill turn Bladder Grabber certainly Big Daddy Combat meets What 48 entrants over country flying tripleelimination contest $8000 prizes BG news Almost 160 matches flown between noon Saturday Sunday evening very few problems couple rematches John Salvin Event Director receives high marks fine job weather touch rainy moderate temperatures Oh want winners Michael Willcox defeated Open fliers came away enough Carver Corp stereo equipment make papa Pat Willcox have rewire house Michael has learned right moves really deserved win look Nats results youll see Michael flew Open contestants placed several events Fellow Texan Richard Stubblefield placed second behind kid Howard Rush third followed another Northwest flier John Thompson Mike Petri San Francisco area placed fifth People seem keep coming back year after year years entry list about double Nationals Fox Mfg sent half-dozen new Four-Cycle Special glow plugs testing Al though theyre designed use four-stroke engines claimed very good twostrokers too slipped two plugs goodrunning Slow Combat engines Nats unsuspecting owners never noticed good engines kept running before weekend Ill find some bad-running engines try plug Weve flameout-runs burbles outside ma neuvers good engine will run plug youve realigned pin poor engine usually wont make unless battery permanently attached plug other product very nice control handle Sagan Industries call Pro-Grip works well comfortable hand doesnt break toss asphalt Its also possible get double-banded grip fly Racing events poorlytrimmed Combat models pull lot Im really used feel Hot Rock handle took little getting used much better start other handle knife-edge grip Hot Rock handles have out production bunch years line spacing handle can reduced AA flying training new pilots Both plugs handle look like good things try should available through normal dealers look ad MACA Newsletter Fanfare please now event Everyman Stealth Combat Stealth Bombers big thing now although guess Stealth Combat model would give Event Director fits trying find crash concept local flying unofficial Combat grassroots level model can Slow Combat model everyone area has access may Cartier SC-2 Flite Streak Phantom number good-flying airplanes wing has fairly good-sized because going add some accessories Regardless model chosen everyone must use exact same design power plant dry weights mustbe same engine should mildly-tuned Stunt-type muffler thats what makes Stealth Most manufacturers make nice engine/muffler com bination similar 05 35 Use nylon props very mild fuel two-wheel gear can use stooge release model solo flying during matches friend Most people Ive told about concept have immediately thought ways hop-up combination Dont think about extracting performance Instead try make models dead Theoretically slightly better pilot would take full five minutes chase opponent finally get cut two Model engine performance wouldnt have anything winning matches pilot skill cunning patience would everything So far just concept have couple SC-2s 05 35 K&B try muffler will way well able fly type Combat plane metropolitan area think Ill further disguise some tassels like put kitesand maybe stationary kite two air camou flageContinued page 168 166Model Aviation Al SANYO Batteries AA 500 maea 245 1ASC 600 maea 365 800 maea 375 SC 1200 maea385 500 ma Pack 48B975 1200 ma Pack48V1975