CONTROL LINE AEROBATICS U ~Tfl S 7 r V flU WHY DO TIlE SUCCESSFUL FLIERS seem have everything work well almost flight dont seems though because pay attention details details technical solutions evolve over time proved field testing adhered provide solid flying packages Often details seem insignificant can have impact airplane perfonns example look tolerances control system experts pay attention whats happening bet several philosophies approaches about set systems up should discuss before get further control system moment well limit discussion leadouts bellcrank horns pushrodsthe heart Control Line model Leadouts two options solid cable has positives negatives final choice personal choice should made knowing playing field Solids simple use proponents would say provide very positive feel No matter type bellcrank used leadout holes have bushed guard against wear installation however must take care bending wire goes through bellcrank prevent angles can will fatigue fracture angles best kept very shallow joining loop joint should soldered per AMA rule book will slip under heavy pull-test wingtips solids always susceptible accidental bend implications Cables different animal flexible therefore prone being bent fractured have some problems opposite solids Over period use cable can saw through materials resaw through itself choice bellcrank Delrin nylon carbon compost linen phenolic must develop system application bushes cable preventing rubbing plastic Since prefer cable solution Ive using semicircle As brass tube cable looped inside held position epoxy has worked again recognizing problem solved finding own solution important old-fashioned aluminum steel cranks must also bushed because metal-on-metal causes fatigue wear both Ive witnessed crashes Nationals cable aluminum bellcrank wore through just few weeks flying dont want happen good airplane want another few hours work Belleranks hean system take care Take look really competitive designs have published focus bellcrank installed post music wire has proven satisfactory well supported Dont use bolts actual diameter affecting strength much smaller major diameter plastic bellcranks prefer least eter bearing thought does provide sufficient surface area hold up heavy tension vibration overtime means turned bushing preferably phosphor bronze brass has nice tight fit wire bellcrank approximately 001 Dan Winship imbeds carbon composite manufactures also provides complementary music wire fit Another point emphasize during installation its important keep heat away plastic parts Practically can accomplished inverted eyelets soldering ends away bellcrank Connected bellcrank via pushrod flap horn critical high-stress areas control system connection fit pushrod wire bearing horn must correctly aligned prevent excessive wear system bearing can machined simply 12 ID brass tube has common use decades serves well wire correct size reality commonly available 42 wire undersized measuring 092 rather 09375 gives sloppy fit very critical area try find some true 12 wire make bushing correct size metric drill 235 mm 092 youve got hunt bit find size another problem current wire available Bob Gieseke mentioned wire has recently purchased several sources broke under right-angle bend indicates too brittle temper wire dont know widespread would wise run tests before bet airplane defective wire Now flap-to-elevator connection get some controversy slop slop question two schools thought Some loose movement elevator approximately /is up down viewed providing inflight benefits pleasant groove level flight can achieved albeit forward center gravity Tracking supposedly improved other approach use tight fit can achieve seems attuned current trend positioning center gravity CG far back airplane will tolerate tight controls permit precise control No matter tight get controls initially usually experience 120 Model Aviation 4From 1980s Bob McDonalds Sagitta HP 40 Elegant classic lines superbly executed Voices past 1993 Nationals Windy Urtnowskis mid-Ed Southwicks Lark Note similarity Palmer sized Cardinal 08 46VF pipeThunderbird designs Available kit Kenn Smith some play system stabilizes after first 100 flights personal recommendation latter approach Over years intentionally sloppy control systems did groove well presented loop-tracking difficulties imprecise bottoms Provided airplane accurately built tight system did track better gave precise control Since aiming longevity system tight system will last indefinitely sloppy system will pound itself out eventually forcing rebush systemusually after season summaiize Pay attention alignment Any errors will tend compound flight loads vibration Try get wire-to-bearing fits tight possible Take precautions isolate plastic epoxy bonded units excess heat example assemble carbon pushrod solder keeper washer wire should consider heat sink isolate epoxy joint hemostat small ViseGrip pliers will serve nicely critical area time spend greater will rewardwith better performance longer system life Tech Tips Classic Stunt continues increase popularity has drawn fliers back CL roots strive make recreations close way also try use engines bygone era Although may sometimes difficult obtain available offer challenge making run well recently ran across problem could get two different-make engines run severely choking would start essentially bum out prime draw fueleven needle valve wide open George Aldrich picked up solution Some old needle-valve bodies intended pressure use erroneously drilled very small outlet hole approximately 040 solution simple Drill out body hole 055 #54 drill problem goes away lls ls s Precision Instruments FREE CATALOG __LA -ri-i ES CAMPBELL TOOLS Co 2100-M Selma Rd Spnngfield OH 45505 Mvecor4 Ylez 0&rer 513-322 8562 800 rudeer orders IPJL9A TEE DEE & REED ENGINES 010S 020S 049S 051S 074S & 09S ALL CUSTOM AND STOCK PARTS ARE AVAILABLE INDIVIDUALLY 6 IB Sin' II6 COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL SOLID CONTROL LINES THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS PLUGS SILK QUALITY DOPE BRUSHES 5 & 7 LOOP 114 GUM BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HI TENSION LEADS 1I2A TEXACO PLAYBOY SR KIT MAIL OR PHONE 619 728-4365 VISA IMC WELCOME NO COD MINIMUM ORDER $1000 PLUS 4tMA ~4A44A%IAI%411484/v RVEL Nfl EIWIKES Kor PRICE NORVEL AME 049 MKII $3 NORVEL AME 049 DIESELj NORVEL AME 061 MKII NORVEL AME 061 DIESELper parts stocked Ohio location 4 competition engines use same crankcase Find out what everybodys talking about Call now order 800 665-9575 216 923-6904 FAX 216 923-4349 MG/I/ISA S & H $400 size order US OH Res add 575% tax May1996 121 ACCU LAB ELECTRONIC DIGITAL SCALES Fourteen brand new high-tech models available weigh both grams ounces Graduations 2 ounces 001 grams Ca pacities 1/2 110 lbs have tare operate AC bat teries Most include AC adaptor Ten models under $300 under $100 Send #10 SASE $1 scale brochures MC/Visa Champion Model Products 880 Carmen Ct Unit La Verne CA 91750 sirrply call 909 599-3348 Rubber ft Engine Power Free Flight Display Control Line Electric Power A/C Airplenes Penn Valley Hobby Center 837-A W Main St Lanodele PA 19448 218- 3880770 NEW HIGH-PERFORMANCE GLOW PLUG HEAD STILL COMPATIBLE WITH - CDX TEE DEE THREADS j SOLID BRASS NEEDLE VALVE hern Velocity Ltd 3656 State Road cuyahoga Falls Ohio 44223 f2 I]OR1UH1 [LgIThTM BEAM MOUNT COMPATIBLE WITH COX TEE DEE MOUNT
Edition: Model Aviation - 1996/05
Page Numbers: 120, 121
Edition: Model Aviation - 1996/05
Page Numbers: 120, 121
CONTROL LINE AEROBATICS U ~Tfl S 7 r V flU WHY DO TIlE SUCCESSFUL FLIERS seem have everything work well almost flight dont seems though because pay attention details details technical solutions evolve over time proved field testing adhered provide solid flying packages Often details seem insignificant can have impact airplane perfonns example look tolerances control system experts pay attention whats happening bet several philosophies approaches about set systems up should discuss before get further control system moment well limit discussion leadouts bellcrank horns pushrodsthe heart Control Line model Leadouts two options solid cable has positives negatives final choice personal choice should made knowing playing field Solids simple use proponents would say provide very positive feel No matter type bellcrank used leadout holes have bushed guard against wear installation however must take care bending wire goes through bellcrank prevent angles can will fatigue fracture angles best kept very shallow joining loop joint should soldered per AMA rule book will slip under heavy pull-test wingtips solids always susceptible accidental bend implications Cables different animal flexible therefore prone being bent fractured have some problems opposite solids Over period use cable can saw through materials resaw through itself choice bellcrank Delrin nylon carbon compost linen phenolic must develop system application bushes cable preventing rubbing plastic Since prefer cable solution Ive using semicircle As brass tube cable looped inside held position epoxy has worked again recognizing problem solved finding own solution important old-fashioned aluminum steel cranks must also bushed because metal-on-metal causes fatigue wear both Ive witnessed crashes Nationals cable aluminum bellcrank wore through just few weeks flying dont want happen good airplane want another few hours work Belleranks hean system take care Take look really competitive designs have published focus bellcrank installed post music wire has proven satisfactory well supported Dont use bolts actual diameter affecting strength much smaller major diameter plastic bellcranks prefer least eter bearing thought does provide sufficient surface area hold up heavy tension vibration overtime means turned bushing preferably phosphor bronze brass has nice tight fit wire bellcrank approximately 001 Dan Winship imbeds carbon composite manufactures also provides complementary music wire fit Another point emphasize during installation its important keep heat away plastic parts Practically can accomplished inverted eyelets soldering ends away bellcrank Connected bellcrank via pushrod flap horn critical high-stress areas control system connection fit pushrod wire bearing horn must correctly aligned prevent excessive wear system bearing can machined simply 12 ID brass tube has common use decades serves well wire correct size reality commonly available 42 wire undersized measuring 092 rather 09375 gives sloppy fit very critical area try find some true 12 wire make bushing correct size metric drill 235 mm 092 youve got hunt bit find size another problem current wire available Bob Gieseke mentioned wire has recently purchased several sources broke under right-angle bend indicates too brittle temper wire dont know widespread would wise run tests before bet airplane defective wire Now flap-to-elevator connection get some controversy slop slop question two schools thought Some loose movement elevator approximately /is up down viewed providing inflight benefits pleasant groove level flight can achieved albeit forward center gravity Tracking supposedly improved other approach use tight fit can achieve seems attuned current trend positioning center gravity CG far back airplane will tolerate tight controls permit precise control No matter tight get controls initially usually experience 120 Model Aviation 4From 1980s Bob McDonalds Sagitta HP 40 Elegant classic lines superbly executed Voices past 1993 Nationals Windy Urtnowskis mid-Ed Southwicks Lark Note similarity Palmer sized Cardinal 08 46VF pipeThunderbird designs Available kit Kenn Smith some play system stabilizes after first 100 flights personal recommendation latter approach Over years intentionally sloppy control systems did groove well presented loop-tracking difficulties imprecise bottoms Provided airplane accurately built tight system did track better gave precise control Since aiming longevity system tight system will last indefinitely sloppy system will pound itself out eventually forcing rebush systemusually after season summaiize Pay attention alignment Any errors will tend compound flight loads vibration Try get wire-to-bearing fits tight possible Take precautions isolate plastic epoxy bonded units excess heat example assemble carbon pushrod solder keeper washer wire should consider heat sink isolate epoxy joint hemostat small ViseGrip pliers will serve nicely critical area time spend greater will rewardwith better performance longer system life Tech Tips Classic Stunt continues increase popularity has drawn fliers back CL roots strive make recreations close way also try use engines bygone era Although may sometimes difficult obtain available offer challenge making run well recently ran across problem could get two different-make engines run severely choking would start essentially bum out prime draw fueleven needle valve wide open George Aldrich picked up solution Some old needle-valve bodies intended pressure use erroneously drilled very small outlet hole approximately 040 solution simple Drill out body hole 055 #54 drill problem goes away lls ls s Precision Instruments FREE CATALOG __LA -ri-i ES CAMPBELL TOOLS Co 2100-M Selma Rd Spnngfield OH 45505 Mvecor4 Ylez 0&rer 513-322 8562 800 rudeer orders IPJL9A TEE DEE & REED ENGINES 010S 020S 049S 051S 074S & 09S ALL CUSTOM AND STOCK PARTS ARE AVAILABLE INDIVIDUALLY 6 IB Sin' II6 COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL SOLID CONTROL LINES THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS PLUGS SILK QUALITY DOPE BRUSHES 5 & 7 LOOP 114 GUM BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HI TENSION LEADS 1I2A TEXACO PLAYBOY SR KIT MAIL OR PHONE 619 728-4365 VISA IMC WELCOME NO COD MINIMUM ORDER $1000 PLUS 4tMA ~4A44A%IAI%411484/v RVEL Nfl EIWIKES Kor PRICE NORVEL AME 049 MKII $3 NORVEL AME 049 DIESELj NORVEL AME 061 MKII NORVEL AME 061 DIESELper parts stocked Ohio location 4 competition engines use same crankcase Find out what everybodys talking about Call now order 800 665-9575 216 923-6904 FAX 216 923-4349 MG/I/ISA S & H $400 size order US OH Res add 575% tax May1996 121 ACCU LAB ELECTRONIC DIGITAL SCALES Fourteen brand new high-tech models available weigh both grams ounces Graduations 2 ounces 001 grams Ca pacities 1/2 110 lbs have tare operate AC bat teries Most include AC adaptor Ten models under $300 under $100 Send #10 SASE $1 scale brochures MC/Visa Champion Model Products 880 Carmen Ct Unit La Verne CA 91750 sirrply call 909 599-3348 Rubber ft Engine Power Free Flight Display Control Line Electric Power A/C Airplenes Penn Valley Hobby Center 837-A W Main St Lanodele PA 19448 218- 3880770 NEW HIGH-PERFORMANCE GLOW PLUG HEAD STILL COMPATIBLE WITH - CDX TEE DEE THREADS j SOLID BRASS NEEDLE VALVE hern Velocity Ltd 3656 State Road cuyahoga Falls Ohio 44223 f2 I]OR1UH1 [LgIThTM BEAM MOUNT COMPATIBLE WITH COX TEE DEE MOUNT
