Control Line Aerobatics Ted Fancher STARTING FRESH seems like socalled experts sometimes forget things take granted simply understood newcomers event retro spect no reason should understand aint never splained Such case point letter Michael Martin Albuquerque NM perplexed about different engines nominally identi cal displacement consumed radically different amounts fuel produced vastly different amounts power. specifically what should budding Stunt pilot about Some edited excerpts follow have flying Carl Goldberg Shoe string equipped Fox 36RC 325-oz Triangle Hobbies Combat tank using 10% Red Max fuel have getting three-minute flights use 5% fuel still wont get eightminute flights needed CL Aerobatics same plane Fox 35 gets nine-minute flights doesnt seem have much power dont know what Fox 36 such gasguzzler should used Combat Fox 35 just powerful enough ambitious Stunt pilot also have Ringmaster Fox 35 two-ounce clunk tank flies beautifully right side up goes rich inverted center line tank line venturi old pros have suggested Triangle Hobbies says Combat tank must located e centerline venturi Can explain necessary have offset must done plane As Michael suggests fuels engines Stunt profile fuselages often seem insoluble mystery beginnersespecially thing read pros full such gobbledygook itro tor versus synthetic oils oke area. uniflow suction etc Lets try break power-plant questions Michael raises down basics importance beginning Stunt pilots First dont need eight-minute engine run Stunt Eight minutes maxz mum time rules allow time signal start until end landing roll Actually flying pattern takes just about 5 minutes launch end Clover Allowing minute start set needle protection against running short results maximum desirable run 630 645 OK solves easy part need enough fuel run 6 minutes Now determine much what type fuel will use achieve Lets break fuel down its basics need components provide lubrication com bustion Thats necessary perfectly usable model engine fuel combination alcohol usually methanol oil usually castor oil about three-to-one ratio actual practice use some percentage power addi tive generally nitromethane refine amount energy derived tank fuel jury always Out lubricant best castor oil synthetics Ive used itself presently use combination essfully Generally amount lubricant June 1987 73 gorgeous Skyscraper late-limes aeslgn great Bob Palmer Finish white red bluetrim power Clarence Lee-modified Veco 45 nevercame outas kit Model pride joy Guy Markham Coronado CA uses tricycle gear Fancher embarrassed Heres photo handsome young man great-looking Stunterand has lost sheet details Pleasewill modeler sent write Ted give him Info again proper credit can given Model isreminiscentoftheoldVecoChlef butthetaperedwingandlongertall moment hint modern heritage seems important actual run precise ingredient absolute minimum would suggest 20% Continued page 178 Bill Rich Tampa Bay FL looking Stunt fliers help him fly Telesis II design L Big plane ST 60-powered uses Tom Dixons Bolly 3-bladed props Wing design isa Greenaway U Bill Rich plc DennyAdamisin has really gone step beyond new Tandemonium Rl Power Big Art-modified OS 35 Probe left rear-wing tip line guide Photo D Adamisin Maicnea rerrormance ystem- TOP PERFORMANCE KaB ENGINES AarpneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER POXY THINNER KSB SUPER FOXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS Ideal Power Pock Connector elecfrlc planes cars boats Designed high vibration environment Cycled ten Thousand times electricOl failure PJ Anderson Power Products Inc ORRY NO PERSONAL CHECKS OR COD ORDERS Only certified checks money orders accepted MinimumorderSiOQO torfhreepackagesof4 Powerpoles $300 per package plus $100 ship ping handling CT residents add 75% sales tax Prices subject change wifhouf notice Dealer Inquiries Invited further intormofion dealer prices send SASE Bus Card SERMOS RIC SNAP CONNECTORS Cedar Corners Station Box 16787 Stamford CT 06905 looking forward national-level compe tition top three four planes usually have much time put main competition atthe 85 Nats Bill Boss Mosquito Bomber veteran previous Nats competition very fortunate compete against such fine Precision Scale subject though gone Nats test flight under belt static judging score of4l 8 points seemedto biggest asset probably sole advantage throughthe flying phase competition since quali fying flight point-accumulating would have liked itto finished 5635 enabled hold onto first place Ever since Sport Scale event caine existence mid-Seventies more modelers seem building flying first Scale projects Sport Scale eventhas made easier compete Scale because demands highly detailed model simply re quired As know airplanes event judged distance 15 ft point detail obscure seen part top three four airplanes Sport Scale competitions far apart static score winners usually decided air maximum total score possible 200 points can see being best airplane ground well being accomplished flier very important consistently place high standings ways have found place high static judging ground have better-detailed model first place Although mentioned earlier necessary have such model should keep mind impressions cannot overlooked ignored person judging model common human reaction keep such detail mind whether supposed omit judging opinlon already seasoned Sport Scale event adding detail Sport models likely ready move Precision Scale have some experience scratch-build ing perhaps best way build next Scale ship Scratch-building model gives freedom incorporate strength light ness closer-to-scale resemblance operating features better detailing allows use building techniques work best you yet scratch-building level also good kits can start modify along way Today kits made Royal Top Flite name just two preferred modelers Kits such manufacturers Berkeley Sterling Japanese models Fifties Sixties very good examples Scale subjects although no longer readily available can still found through col lectors other Scale enthusiasts myself have quite collection impossible find very Scale kits somewhere have probably noticed now have mentioned anything about FAI Scale because have never built model nor competed event yet have full intentions doing near future So can see 30 years experience still area Scale explore welcome challenge possible worldclass competition future Keeping mind hope will explore areas Scale competition may have entered yet doing support elevate CL Scale competi tion local area national level Thank allowing speak through CL Scale column please consider supporting Bill Boss efforts provide CL Scale material items interest benefit us urge send Bill articles about Scale activities well pictures latest Scale creations hope meet future Nationals East Coast contests happy give George Gaydos Jr opportunity air views truly fine modeler Repla-Tech International provider Scale drawings photos hundreds airplanes has just announced streamlining its operations plans sell its own line Scale-Tech drawings photos near future new catalog called Aircraft Part has produced 1987 can sending $250 Repla-Tech International 48500 Mckenzie Hwy Vida OR 97488 will also receive Part II catalog contains listings items special sale Please send correspondenceand espe ciallyphotosrelatingto CL Scale BillBoss 77-06 269 Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 73 use Omega fuel add additional four ounces castor oil per gallon addi tional oil causes engine less prone break four-cycle two-cycle return four-cycle reliably after maneuver beginners standpoint such refine ment necessary would simply ensurethat am using fuel major supplier contains least 20% lubricant really includes commercially-available fuel nitro ranges well discussing would favor some castor oil blends 50/50 castor/synthetic two rea sons First castor maintains its ability lubricate higher temperatures synthetics will therefore protect engine better should get hot run Second lapped-piston plain-bearing opposed ball-bearing en gines such Foxes seem run better some castor other two fuel ingredientsalcohol nitroare power team both ingre dients combustibles nitro releases much energy burning Therefore 178 Model Aviation Connectors Designed anything electrical requiring quick disconnects Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba 0-Series orPCM2250 RADIO SOUTH NC AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices __~L~ - eaturing fast service 4AI_L$b qualif led people the___ ___~4P _____ latest equipment including SPECTRUM ANAL YZER Order COC VISA MC andling Charges OPEN 8 5 CST Prices subject change notice K...in 43 West Nine Mile Rd Pensacola FL 32514 Frequency Conversions Kraft$40 Futaba AM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heli Sets Gyros 904 478-6745 ratio nitro alcohol increased power will increase Unfortunately will fuel consump tion Like lunch no free power make simple possible 95% competitive Stunt fliers use nitro percentages 5% 15% beginner worrying about nitro percentages hassle dont need stage development exception live high altitudes such Denver Albuquerque Reno etc less-dense air altitudes will rob some horsepower should probably seek out fuel higher-normal range ie 15% Dont worry about fuel con sumption thinner air will both decrease power rate burn Increasing nitro content will approximately neutralize effects bottom line should looking readily-available high-quality fuel contain ing least 20% lubricant least 50% castor oil anywhere 5% 15% nitro hint Nitro expensive unless like spend money opt lower nitro Decide fuel fits recipe stick doing will have standard ized major variable fuel-consumption equation still doesnt solve problem does other half story engine part little complex As probably aware some engines burn fuel others though may identical displacement inherent result differences design Again power never free engine designed produce maxi mum horsepower operate signifi cantly less its maximum will still burn gas its conservatively-designed counterpart what happening Michaels two Foxes old 35 old conservativelytimed engine moderate power best wont burn much gasbut neither will put out great gobs power. no matter what terms fuel props etc 36 other hand relatively new design less-conser vative timing modern Schnuerle intake ports allow produce power. burn gas Because two engines have fixed venturi sizes just too much can done adjust available amount gas Going low- no-nitro fuel 36 may gain half minute run Going higher nitro 35 would have modest effect power because conservative basic design engine neither case apt produce successful combination would simply need use larger tank 36 way Michaels description poor output particular Fox 35 makes believe probably either worn out damaged some way Fox 35 good condition should provide adequate power Goldberg Shoe string Stunter under almost conditions have some increased flexibility engines equipped removable venturi inserts such OS Supertigre inserts easily duplicated having variety easy Simply making bore larger smaller can have direct affect power fuel consumption Enlarging bore will crease power fuel consumption vice versa Always very deliberate changing venturi size very small difference bore will make noticeable change performance addition enlarging venturi will cause reduction fuel draw vice versa Fuel draw measure engines ability suck fuel tank smaller venturi size better will draw consistently engine will run regardiess airplane attitude As intake enlarged suction reduced engine will have greater tendency shift four-cycle two-cycle result aircraft attitude Expert fliers use combinations intake size nitro content fine-tune var iablespower fuel economy fuel draw therefore engine breaksto achieve precisely type engine run want As fuels just getting started Stunt biz suggest ignore such refine ments engine department Settle engine high quality break properly determine its fuel consumption rate using standard fuel simply ensure have big enough tank allow 6i- sevenminute flights Most 35s will need no four ounces 40s 46s should probably have room six ounces 60s need up eight Once have determined consumption rate engine/fuel combo fuel tank measured amount use Sig five-ounce syringe know precisely much fuel tank within 15 seconds long will run subject oftank levels profile Stunters following can considered almost gospel using baffle-piston engine centerline tank precisely fuel pickup tube will have above centerline engine avoid richening mixture outside maneuvers Proper tank height fundamental trim adjustments must made airplane competitive engine runs builder must aware provide means adjust height tank good place start e engine centerline final adjustment must done trial error way refinements have suggesting can put off until become skilled cant fly good beginner pattern engine halfquitting time go inverted Good news Once again appears rumored demise Control Line premature Im receiving more reports greatly increased participation particularly Stunt Tom Dixons Atlanta group up 30 10 time last year almost identical numbers reported Clovis Controliners near Fresno CA Let know area seeing such rebirth cant keep great idea downl Last item youve using lack Advanced skill-level class Stunt Nats excuse attend youre out luck Contact Rolland McDonald 28746 Westfield Livonia MI 48150 info years un official nonetheless very real Advanced event Rollie Jack Sheeks have taken bull horns providing methodology groundwork awards bag come out support hobby See Lincoln Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 June1987179 J
Edition: Model Aviation - 1987/06
Page Numbers: 73, 178, 179
Control Line Aerobatics Ted Fancher STARTING FRESH seems like socalled experts sometimes forget things take granted simply understood newcomers event retro spect no reason should understand aint never splained Such case point letter Michael Martin Albuquerque NM perplexed about different engines nominally identi cal displacement consumed radically different amounts fuel produced vastly different amounts power. specifically what should budding Stunt pilot about Some edited excerpts follow have flying Carl Goldberg Shoe string equipped Fox 36RC 325-oz Triangle Hobbies Combat tank using 10% Red Max fuel have getting three-minute flights use 5% fuel still wont get eightminute flights needed CL Aerobatics same plane Fox 35 gets nine-minute flights doesnt seem have much power dont know what Fox 36 such gasguzzler should used Combat Fox 35 just powerful enough ambitious Stunt pilot also have Ringmaster Fox 35 two-ounce clunk tank flies beautifully right side up goes rich inverted center line tank line venturi old pros have suggested Triangle Hobbies says Combat tank must located e centerline venturi Can explain necessary have offset must done plane As Michael suggests fuels engines Stunt profile fuselages often seem insoluble mystery beginnersespecially thing read pros full such gobbledygook itro tor versus synthetic oils oke area. uniflow suction etc Lets try break power-plant questions Michael raises down basics importance beginning Stunt pilots First dont need eight-minute engine run Stunt Eight minutes maxz mum time rules allow time signal start until end landing roll Actually flying pattern takes just about 5 minutes launch end Clover Allowing minute start set needle protection against running short results maximum desirable run 630 645 OK solves easy part need enough fuel run 6 minutes Now determine much what type fuel will use achieve Lets break fuel down its basics need components provide lubrication com bustion Thats necessary perfectly usable model engine fuel combination alcohol usually methanol oil usually castor oil about three-to-one ratio actual practice use some percentage power addi tive generally nitromethane refine amount energy derived tank fuel jury always Out lubricant best castor oil synthetics Ive used itself presently use combination essfully Generally amount lubricant June 1987 73 gorgeous Skyscraper late-limes aeslgn great Bob Palmer Finish white red bluetrim power Clarence Lee-modified Veco 45 nevercame outas kit Model pride joy Guy Markham Coronado CA uses tricycle gear Fancher embarrassed Heres photo handsome young man great-looking Stunterand has lost sheet details Pleasewill modeler sent write Ted give him Info again proper credit can given Model isreminiscentoftheoldVecoChlef butthetaperedwingandlongertall moment hint modern heritage seems important actual run precise ingredient absolute minimum would suggest 20% Continued page 178 Bill Rich Tampa Bay FL looking Stunt fliers help him fly Telesis II design L Big plane ST 60-powered uses Tom Dixons Bolly 3-bladed props Wing design isa Greenaway U Bill Rich plc DennyAdamisin has really gone step beyond new Tandemonium Rl Power Big Art-modified OS 35 Probe left rear-wing tip line guide Photo D Adamisin Maicnea rerrormance ystem- TOP PERFORMANCE KaB ENGINES AarpneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER POXY THINNER KSB SUPER FOXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS Ideal Power Pock Connector elecfrlc planes cars boats Designed high vibration environment Cycled ten Thousand times electricOl failure PJ Anderson Power Products Inc ORRY NO PERSONAL CHECKS OR COD ORDERS Only certified checks money orders accepted MinimumorderSiOQO torfhreepackagesof4 Powerpoles $300 per package plus $100 ship ping handling CT residents add 75% sales tax Prices subject change wifhouf notice Dealer Inquiries Invited further intormofion dealer prices send SASE Bus Card SERMOS RIC SNAP CONNECTORS Cedar Corners Station Box 16787 Stamford CT 06905 looking forward national-level compe tition top three four planes usually have much time put main competition atthe 85 Nats Bill Boss Mosquito Bomber veteran previous Nats competition very fortunate compete against such fine Precision Scale subject though gone Nats test flight under belt static judging score of4l 8 points seemedto biggest asset probably sole advantage throughthe flying phase competition since quali fying flight point-accumulating would have liked itto finished 5635 enabled hold onto first place Ever since Sport Scale event caine existence mid-Seventies more modelers seem building flying first Scale projects Sport Scale eventhas made easier compete Scale because demands highly detailed model simply re quired As know airplanes event judged distance 15 ft point detail obscure seen part top three four airplanes Sport Scale competitions far apart static score winners usually decided air maximum total score possible 200 points can see being best airplane ground well being accomplished flier very important consistently place high standings ways have found place high static judging ground have better-detailed model first place Although mentioned earlier necessary have such model should keep mind impressions cannot overlooked ignored person judging model common human reaction keep such detail mind whether supposed omit judging opinlon already seasoned Sport Scale event adding detail Sport models likely ready move Precision Scale have some experience scratch-build ing perhaps best way build next Scale ship Scratch-building model gives freedom incorporate strength light ness closer-to-scale resemblance operating features better detailing allows use building techniques work best you yet scratch-building level also good kits can start modify along way Today kits made Royal Top Flite name just two preferred modelers Kits such manufacturers Berkeley Sterling Japanese models Fifties Sixties very good examples Scale subjects although no longer readily available can still found through col lectors other Scale enthusiasts myself have quite collection impossible find very Scale kits somewhere have probably noticed now have mentioned anything about FAI Scale because have never built model nor competed event yet have full intentions doing near future So can see 30 years experience still area Scale explore welcome challenge possible worldclass competition future Keeping mind hope will explore areas Scale competition may have entered yet doing support elevate CL Scale competi tion local area national level Thank allowing speak through CL Scale column please consider supporting Bill Boss efforts provide CL Scale material items interest benefit us urge send Bill articles about Scale activities well pictures latest Scale creations hope meet future Nationals East Coast contests happy give George Gaydos Jr opportunity air views truly fine modeler Repla-Tech International provider Scale drawings photos hundreds airplanes has just announced streamlining its operations plans sell its own line Scale-Tech drawings photos near future new catalog called Aircraft Part has produced 1987 can sending $250 Repla-Tech International 48500 Mckenzie Hwy Vida OR 97488 will also receive Part II catalog contains listings items special sale Please send correspondenceand espe ciallyphotosrelatingto CL Scale BillBoss 77-06 269 Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 73 use Omega fuel add additional four ounces castor oil per gallon addi tional oil causes engine less prone break four-cycle two-cycle return four-cycle reliably after maneuver beginners standpoint such refine ment necessary would simply ensurethat am using fuel major supplier contains least 20% lubricant really includes commercially-available fuel nitro ranges well discussing would favor some castor oil blends 50/50 castor/synthetic two rea sons First castor maintains its ability lubricate higher temperatures synthetics will therefore protect engine better should get hot run Second lapped-piston plain-bearing opposed ball-bearing en gines such Foxes seem run better some castor other two fuel ingredientsalcohol nitroare power team both ingre dients combustibles nitro releases much energy burning Therefore 178 Model Aviation Connectors Designed anything electrical requiring quick disconnects Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba 0-Series orPCM2250 RADIO SOUTH NC AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices __~L~ - eaturing fast service 4AI_L$b qualif led people the___ ___~4P _____ latest equipment including SPECTRUM ANAL YZER Order COC VISA MC andling Charges OPEN 8 5 CST Prices subject change notice K...in 43 West Nine Mile Rd Pensacola FL 32514 Frequency Conversions Kraft$40 Futaba AM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heli Sets Gyros 904 478-6745 ratio nitro alcohol increased power will increase Unfortunately will fuel consump tion Like lunch no free power make simple possible 95% competitive Stunt fliers use nitro percentages 5% 15% beginner worrying about nitro percentages hassle dont need stage development exception live high altitudes such Denver Albuquerque Reno etc less-dense air altitudes will rob some horsepower should probably seek out fuel higher-normal range ie 15% Dont worry about fuel con sumption thinner air will both decrease power rate burn Increasing nitro content will approximately neutralize effects bottom line should looking readily-available high-quality fuel contain ing least 20% lubricant least 50% castor oil anywhere 5% 15% nitro hint Nitro expensive unless like spend money opt lower nitro Decide fuel fits recipe stick doing will have standard ized major variable fuel-consumption equation still doesnt solve problem does other half story engine part little complex As probably aware some engines burn fuel others though may identical displacement inherent result differences design Again power never free engine designed produce maxi mum horsepower operate signifi cantly less its maximum will still burn gas its conservatively-designed counterpart what happening Michaels two Foxes old 35 old conservativelytimed engine moderate power best wont burn much gasbut neither will put out great gobs power. no matter what terms fuel props etc 36 other hand relatively new design less-conser vative timing modern Schnuerle intake ports allow produce power. burn gas Because two engines have fixed venturi sizes just too much can done adjust available amount gas Going low- no-nitro fuel 36 may gain half minute run Going higher nitro 35 would have modest effect power because conservative basic design engine neither case apt produce successful combination would simply need use larger tank 36 way Michaels description poor output particular Fox 35 makes believe probably either worn out damaged some way Fox 35 good condition should provide adequate power Goldberg Shoe string Stunter under almost conditions have some increased flexibility engines equipped removable venturi inserts such OS Supertigre inserts easily duplicated having variety easy Simply making bore larger smaller can have direct affect power fuel consumption Enlarging bore will crease power fuel consumption vice versa Always very deliberate changing venturi size very small difference bore will make noticeable change performance addition enlarging venturi will cause reduction fuel draw vice versa Fuel draw measure engines ability suck fuel tank smaller venturi size better will draw consistently engine will run regardiess airplane attitude As intake enlarged suction reduced engine will have greater tendency shift four-cycle two-cycle result aircraft attitude Expert fliers use combinations intake size nitro content fine-tune var iablespower fuel economy fuel draw therefore engine breaksto achieve precisely type engine run want As fuels just getting started Stunt biz suggest ignore such refine ments engine department Settle engine high quality break properly determine its fuel consumption rate using standard fuel simply ensure have big enough tank allow 6i- sevenminute flights Most 35s will need no four ounces 40s 46s should probably have room six ounces 60s need up eight Once have determined consumption rate engine/fuel combo fuel tank measured amount use Sig five-ounce syringe know precisely much fuel tank within 15 seconds long will run subject oftank levels profile Stunters following can considered almost gospel using baffle-piston engine centerline tank precisely fuel pickup tube will have above centerline engine avoid richening mixture outside maneuvers Proper tank height fundamental trim adjustments must made airplane competitive engine runs builder must aware provide means adjust height tank good place start e engine centerline final adjustment must done trial error way refinements have suggesting can put off until become skilled cant fly good beginner pattern engine halfquitting time go inverted Good news Once again appears rumored demise Control Line premature Im receiving more reports greatly increased participation particularly Stunt Tom Dixons Atlanta group up 30 10 time last year almost identical numbers reported Clovis Controliners near Fresno CA Let know area seeing such rebirth cant keep great idea downl Last item youve using lack Advanced skill-level class Stunt Nats excuse attend youre out luck Contact Rolland McDonald 28746 Westfield Livonia MI 48150 info years un official nonetheless very real Advanced event Rollie Jack Sheeks have taken bull horns providing methodology groundwork awards bag come out support hobby See Lincoln Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 June1987179 J
Edition: Model Aviation - 1987/06
Page Numbers: 73, 178, 179
Control Line Aerobatics Ted Fancher STARTING FRESH seems like socalled experts sometimes forget things take granted simply understood newcomers event retro spect no reason should understand aint never splained Such case point letter Michael Martin Albuquerque NM perplexed about different engines nominally identi cal displacement consumed radically different amounts fuel produced vastly different amounts power. specifically what should budding Stunt pilot about Some edited excerpts follow have flying Carl Goldberg Shoe string equipped Fox 36RC 325-oz Triangle Hobbies Combat tank using 10% Red Max fuel have getting three-minute flights use 5% fuel still wont get eightminute flights needed CL Aerobatics same plane Fox 35 gets nine-minute flights doesnt seem have much power dont know what Fox 36 such gasguzzler should used Combat Fox 35 just powerful enough ambitious Stunt pilot also have Ringmaster Fox 35 two-ounce clunk tank flies beautifully right side up goes rich inverted center line tank line venturi old pros have suggested Triangle Hobbies says Combat tank must located e centerline venturi Can explain necessary have offset must done plane As Michael suggests fuels engines Stunt profile fuselages often seem insoluble mystery beginnersespecially thing read pros full such gobbledygook itro tor versus synthetic oils oke area. uniflow suction etc Lets try break power-plant questions Michael raises down basics importance beginning Stunt pilots First dont need eight-minute engine run Stunt Eight minutes maxz mum time rules allow time signal start until end landing roll Actually flying pattern takes just about 5 minutes launch end Clover Allowing minute start set needle protection against running short results maximum desirable run 630 645 OK solves easy part need enough fuel run 6 minutes Now determine much what type fuel will use achieve Lets break fuel down its basics need components provide lubrication com bustion Thats necessary perfectly usable model engine fuel combination alcohol usually methanol oil usually castor oil about three-to-one ratio actual practice use some percentage power addi tive generally nitromethane refine amount energy derived tank fuel jury always Out lubricant best castor oil synthetics Ive used itself presently use combination essfully Generally amount lubricant June 1987 73 gorgeous Skyscraper late-limes aeslgn great Bob Palmer Finish white red bluetrim power Clarence Lee-modified Veco 45 nevercame outas kit Model pride joy Guy Markham Coronado CA uses tricycle gear Fancher embarrassed Heres photo handsome young man great-looking Stunterand has lost sheet details Pleasewill modeler sent write Ted give him Info again proper credit can given Model isreminiscentoftheoldVecoChlef butthetaperedwingandlongertall moment hint modern heritage seems important actual run precise ingredient absolute minimum would suggest 20% Continued page 178 Bill Rich Tampa Bay FL looking Stunt fliers help him fly Telesis II design L Big plane ST 60-powered uses Tom Dixons Bolly 3-bladed props Wing design isa Greenaway U Bill Rich plc DennyAdamisin has really gone step beyond new Tandemonium Rl Power Big Art-modified OS 35 Probe left rear-wing tip line guide Photo D Adamisin Maicnea rerrormance ystem- TOP PERFORMANCE KaB ENGINES AarpneMarine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER POXY THINNER KSB SUPER FOXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS Ideal Power Pock Connector elecfrlc planes cars boats Designed high vibration environment Cycled ten Thousand times electricOl failure PJ Anderson Power Products Inc ORRY NO PERSONAL CHECKS OR COD ORDERS Only certified checks money orders accepted MinimumorderSiOQO torfhreepackagesof4 Powerpoles $300 per package plus $100 ship ping handling CT residents add 75% sales tax Prices subject change wifhouf notice Dealer Inquiries Invited further intormofion dealer prices send SASE Bus Card SERMOS RIC SNAP CONNECTORS Cedar Corners Station Box 16787 Stamford CT 06905 looking forward national-level compe tition top three four planes usually have much time put main competition atthe 85 Nats Bill Boss Mosquito Bomber veteran previous Nats competition very fortunate compete against such fine Precision Scale subject though gone Nats test flight under belt static judging score of4l 8 points seemedto biggest asset probably sole advantage throughthe flying phase competition since quali fying flight point-accumulating would have liked itto finished 5635 enabled hold onto first place Ever since Sport Scale event caine existence mid-Seventies more modelers seem building flying first Scale projects Sport Scale eventhas made easier compete Scale because demands highly detailed model simply re quired As know airplanes event judged distance 15 ft point detail obscure seen part top three four airplanes Sport Scale competitions far apart static score winners usually decided air maximum total score possible 200 points can see being best airplane ground well being accomplished flier very important consistently place high standings ways have found place high static judging ground have better-detailed model first place Although mentioned earlier necessary have such model should keep mind impressions cannot overlooked ignored person judging model common human reaction keep such detail mind whether supposed omit judging opinlon already seasoned Sport Scale event adding detail Sport models likely ready move Precision Scale have some experience scratch-build ing perhaps best way build next Scale ship Scratch-building model gives freedom incorporate strength light ness closer-to-scale resemblance operating features better detailing allows use building techniques work best you yet scratch-building level also good kits can start modify along way Today kits made Royal Top Flite name just two preferred modelers Kits such manufacturers Berkeley Sterling Japanese models Fifties Sixties very good examples Scale subjects although no longer readily available can still found through col lectors other Scale enthusiasts myself have quite collection impossible find very Scale kits somewhere have probably noticed now have mentioned anything about FAI Scale because have never built model nor competed event yet have full intentions doing near future So can see 30 years experience still area Scale explore welcome challenge possible worldclass competition future Keeping mind hope will explore areas Scale competition may have entered yet doing support elevate CL Scale competi tion local area national level Thank allowing speak through CL Scale column please consider supporting Bill Boss efforts provide CL Scale material items interest benefit us urge send Bill articles about Scale activities well pictures latest Scale creations hope meet future Nationals East Coast contests happy give George Gaydos Jr opportunity air views truly fine modeler Repla-Tech International provider Scale drawings photos hundreds airplanes has just announced streamlining its operations plans sell its own line Scale-Tech drawings photos near future new catalog called Aircraft Part has produced 1987 can sending $250 Repla-Tech International 48500 Mckenzie Hwy Vida OR 97488 will also receive Part II catalog contains listings items special sale Please send correspondenceand espe ciallyphotosrelatingto CL Scale BillBoss 77-06 269 Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 73 use Omega fuel add additional four ounces castor oil per gallon addi tional oil causes engine less prone break four-cycle two-cycle return four-cycle reliably after maneuver beginners standpoint such refine ment necessary would simply ensurethat am using fuel major supplier contains least 20% lubricant really includes commercially-available fuel nitro ranges well discussing would favor some castor oil blends 50/50 castor/synthetic two rea sons First castor maintains its ability lubricate higher temperatures synthetics will therefore protect engine better should get hot run Second lapped-piston plain-bearing opposed ball-bearing en gines such Foxes seem run better some castor other two fuel ingredientsalcohol nitroare power team both ingre dients combustibles nitro releases much energy burning Therefore 178 Model Aviation Connectors Designed anything electrical requiring quick disconnects Al Radio South Batteries 500 ma Pack 48V975 Futaba conn1250 800 ma Pack 48V1875 Futaba conn2150 1200 ma Pack 48V1950 Futaba conn2250 TX batt Futaba 0-Series orPCM2250 RADIO SOUTH NC AUTHORIZED SERVICE CENTER Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices __~L~ - eaturing fast service 4AI_L$b qualif led people the___ ___~4P _____ latest equipment including SPECTRUM ANAL YZER Order COC VISA MC andling Charges OPEN 8 5 CST Prices subject change notice K...in 43 West Nine Mile Rd Pensacola FL 32514 Frequency Conversions Kraft$40 Futaba AM$30 Futaba FM$40 ProLine/Ace$30 repair $10 Mode Change$35 Repair Heli Sets Gyros 904 478-6745 ratio nitro alcohol increased power will increase Unfortunately will fuel consump tion Like lunch no free power make simple possible 95% competitive Stunt fliers use nitro percentages 5% 15% beginner worrying about nitro percentages hassle dont need stage development exception live high altitudes such Denver Albuquerque Reno etc less-dense air altitudes will rob some horsepower should probably seek out fuel higher-normal range ie 15% Dont worry about fuel con sumption thinner air will both decrease power rate burn Increasing nitro content will approximately neutralize effects bottom line should looking readily-available high-quality fuel contain ing least 20% lubricant least 50% castor oil anywhere 5% 15% nitro hint Nitro expensive unless like spend money opt lower nitro Decide fuel fits recipe stick doing will have standard ized major variable fuel-consumption equation still doesnt solve problem does other half story engine part little complex As probably aware some engines burn fuel others though may identical displacement inherent result differences design Again power never free engine designed produce maxi mum horsepower operate signifi cantly less its maximum will still burn gas its conservatively-designed counterpart what happening Michaels two Foxes old 35 old conservativelytimed engine moderate power best wont burn much gasbut neither will put out great gobs power. no matter what terms fuel props etc 36 other hand relatively new design less-conser vative timing modern Schnuerle intake ports allow produce power. burn gas Because two engines have fixed venturi sizes just too much can done adjust available amount gas Going low- no-nitro fuel 36 may gain half minute run Going higher nitro 35 would have modest effect power because conservative basic design engine neither case apt produce successful combination would simply need use larger tank 36 way Michaels description poor output particular Fox 35 makes believe probably either worn out damaged some way Fox 35 good condition should provide adequate power Goldberg Shoe string Stunter under almost conditions have some increased flexibility engines equipped removable venturi inserts such OS Supertigre inserts easily duplicated having variety easy Simply making bore larger smaller can have direct affect power fuel consumption Enlarging bore will crease power fuel consumption vice versa Always very deliberate changing venturi size very small difference bore will make noticeable change performance addition enlarging venturi will cause reduction fuel draw vice versa Fuel draw measure engines ability suck fuel tank smaller venturi size better will draw consistently engine will run regardiess airplane attitude As intake enlarged suction reduced engine will have greater tendency shift four-cycle two-cycle result aircraft attitude Expert fliers use combinations intake size nitro content fine-tune var iablespower fuel economy fuel draw therefore engine breaksto achieve precisely type engine run want As fuels just getting started Stunt biz suggest ignore such refine ments engine department Settle engine high quality break properly determine its fuel consumption rate using standard fuel simply ensure have big enough tank allow 6i- sevenminute flights Most 35s will need no four ounces 40s 46s should probably have room six ounces 60s need up eight Once have determined consumption rate engine/fuel combo fuel tank measured amount use Sig five-ounce syringe know precisely much fuel tank within 15 seconds long will run subject oftank levels profile Stunters following can considered almost gospel using baffle-piston engine centerline tank precisely fuel pickup tube will have above centerline engine avoid richening mixture outside maneuvers Proper tank height fundamental trim adjustments must made airplane competitive engine runs builder must aware provide means adjust height tank good place start e engine centerline final adjustment must done trial error way refinements have suggesting can put off until become skilled cant fly good beginner pattern engine halfquitting time go inverted Good news Once again appears rumored demise Control Line premature Im receiving more reports greatly increased participation particularly Stunt Tom Dixons Atlanta group up 30 10 time last year almost identical numbers reported Clovis Controliners near Fresno CA Let know area seeing such rebirth cant keep great idea downl Last item youve using lack Advanced skill-level class Stunt Nats excuse attend youre out luck Contact Rolland McDonald 28746 Westfield Livonia MI 48150 info years un official nonetheless very real Advanced event Rollie Jack Sheeks have taken bull horns providing methodology groundwork awards bag come out support hobby See Lincoln Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 June1987179 J