CONTROL LINE AEROBATICS THIS MONTH Im going close out discussion future technology commenting finishes props structures Vintage Stunt Championships some long conversations about technology fliers particular Bob Hunt Bill Netzeband As talked became clear technical points already within grasp course begs question hasnt someone gone all-out technology demonstration answer equally obvious competitive fliers need competitive model year usually no time make sweeping changes Therefore technology infusion has normally followed methodical evolutionary path Hopefully some columns may trigger projects may leap current paths Speaking changes advent regulations governing organic materials emissions may force us new arena may impacted ways due finishing materials employ Have noticed dramatic price increases butyrate Two champions Reigning world champ Paul Walker daughter Kristen third May Northwest Regionals Oregon dopes last couple years Epoxy users may remember recent halt K&D availability everything now available Prices also affected automotive acrylic lacquers use single- multicomponent may soon thing past Water-based paints seem preferred choice because controlled emissions consider affects some requirements such shrinking coverings over open-bay structures arent definitive answers yet whole picture clear However its good time start thinking preparing future contestant Texas State Championships asked should focusing efforts Given fact decent model ST 60 engine looked okay quick reply propeller development have references moderately low low very low pitch setups magazines PAMPA newsletter Classic non-piped engine 4-2 cycle benefits increased rpm advantageous spot torque curve course piped engines element low-pitch props some new developments surfacing worthy experiments running smaller engines 30-40 Top Flite 11 x 4 Power Point must-try props raked tip reason its name airfoil looks like highperformance free flight power model instead usual Clark 110 Model Aviation y Urtnowskis latest stunter Tsunami Built-up Sig dope 80 ounces Rabe rudder ST 60 make formidable Bob Storicks Viper Super Glide 50 ounces 56-inch span 0S Bob Storick St Louis shows bare bones latest FP 40 Nering pipe Classic lines should preserved Stunter Note classic I-beam construction derivative leading trailing edges upswept slight undercamber comparison Bolly Carbon Epoxy props have virtually same airfoil feel airfoils difficult describe once youve felt will want keep sensation warned sound engines probably what youre accustomed Youre going turning up 10500-11500 region get model speed should will also probably able fly somewhat slower before because now up torque curve low gear Another emerging trend severely undercambered props Brian Eather working Dave Fitzgerald Ted Fancher What distinguishes prop others modification airfoil undercamber previously described props few thousandths visible laying straightedge across bottom blade Eather props airfoiled like Nordic glider very thinned-out section high undercamber Only quality handwork carbon epoxy makes practical trailing edges paper thin technique starting backwards leading edge must employed Brian recommends depitching prop because extra thrust suspect also reason behind Dave Ted using depitched props getting best combination options higher horsepower lower gearing controlled thrust light weight high strength carbon epoxy moldings limit prop development has yet reached Its difficult predict direction next thrust will precision aerobatics application know lighter props would better because gyroscopic effect particularly higher rpm tending towards New resins sophisticated fibers being developed may help technique has tried larger props both B oily some Russians may helpful use hollow blade balsa core blade essentially shell As ponder however wonder pitching procedure heating twisting would work balsa core Ill briefly revisit topic structures reinforce point stress concentration Using carbon fiber strengthen lighten structures should done carefully Free flight competition fliers have discovered too-rigid structure fails high-impact landings Towline gliders have wings break rather flex integrating composite materials consider real purpose change reason behind comments recently heard new Stunter folding wing carbon mat used finishing technique mat applied after model assembled ended just short wing root material applied nitrate dope resulting surface extremely stiff problem set up stress point right wing root already concentration point stiffened wing acted effective lever under load eventually fractured took entire outboard wing point should made wing construction sufficient carry load carbon Enough technology Its time share news about new look old friend venerable Fox 35 some time George Aldrich has thinking about reduce excessive vibration caused heavy iron piston Fox 35 has prototypes ABC cylinder/piston assemblies direct dimensional copies standard Fox setup saw run no doubt significantly reduces vibration hop-up timing changes dont expect fact George hand-fits unit guarantees superior engines aluminum piston running chrome will have lengthy life along low vibration fit makes worthwhile change George offering two options 1 drop-in exchange stock parts can purchase cylinder piston set install yourself 2 can purchase complete engine Contact George Aldrich 12822 Tarrytown San Antonio TX 78233 Tel 210 656-2021 youre like hate build tanks vital part package time-consuming usually requires volume adjustment model conversation Kevin Smith about capabilities fabricate tanks first occasion Ive order Kevin has extensive line tanks needed squeeze much capacity possible short nose section Kevin will bend shells furnish complete tanks dimensions option chose shells could plumb way wanted adjust length suit duration wanted extremely pleased workmanship materials recommend Kevins work highly wont disappointed Contact Smiths Model Products 521 Jansen Avenue San Dimas CA 91773-1617 Tel 909 592-2100 Kevin also has new profile kit available Pathfinder designed well-known flier Gorden Delaney Bart Klapinski recommends design highly give try need good-flying profile IALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1I2A TEXACO PLAYBOY SR KIT 112A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS October1994 111 OUR REV-UP INVENTORY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAJMC 1938 KLOUD KING 72 DELUXE KIT $15996 SPECIFICATIONS Engine 25 40 2 Cy le 40 48 4 Cycle Radio 3 Channel B&M MODEL CO 290 w 1010 N lAYTON UT 84041 PHONE 801544-5609 Sender Call Free Brochure Ann 1005 SHIPPINO/HANDLING UT REO Ann 005% TAX
Edition: Model Aviation - 1994/10
Page Numbers: 110, 111
CONTROL LINE AEROBATICS THIS MONTH Im going close out discussion future technology commenting finishes props structures Vintage Stunt Championships some long conversations about technology fliers particular Bob Hunt Bill Netzeband As talked became clear technical points already within grasp course begs question hasnt someone gone all-out technology demonstration answer equally obvious competitive fliers need competitive model year usually no time make sweeping changes Therefore technology infusion has normally followed methodical evolutionary path Hopefully some columns may trigger projects may leap current paths Speaking changes advent regulations governing organic materials emissions may force us new arena may impacted ways due finishing materials employ Have noticed dramatic price increases butyrate Two champions Reigning world champ Paul Walker daughter Kristen third May Northwest Regionals Oregon dopes last couple years Epoxy users may remember recent halt K&D availability everything now available Prices also affected automotive acrylic lacquers use single- multicomponent may soon thing past Water-based paints seem preferred choice because controlled emissions consider affects some requirements such shrinking coverings over open-bay structures arent definitive answers yet whole picture clear However its good time start thinking preparing future contestant Texas State Championships asked should focusing efforts Given fact decent model ST 60 engine looked okay quick reply propeller development have references moderately low low very low pitch setups magazines PAMPA newsletter Classic non-piped engine 4-2 cycle benefits increased rpm advantageous spot torque curve course piped engines element low-pitch props some new developments surfacing worthy experiments running smaller engines 30-40 Top Flite 11 x 4 Power Point must-try props raked tip reason its name airfoil looks like highperformance free flight power model instead usual Clark 110 Model Aviation y Urtnowskis latest stunter Tsunami Built-up Sig dope 80 ounces Rabe rudder ST 60 make formidable Bob Storicks Viper Super Glide 50 ounces 56-inch span 0S Bob Storick St Louis shows bare bones latest FP 40 Nering pipe Classic lines should preserved Stunter Note classic I-beam construction derivative leading trailing edges upswept slight undercamber comparison Bolly Carbon Epoxy props have virtually same airfoil feel airfoils difficult describe once youve felt will want keep sensation warned sound engines probably what youre accustomed Youre going turning up 10500-11500 region get model speed should will also probably able fly somewhat slower before because now up torque curve low gear Another emerging trend severely undercambered props Brian Eather working Dave Fitzgerald Ted Fancher What distinguishes prop others modification airfoil undercamber previously described props few thousandths visible laying straightedge across bottom blade Eather props airfoiled like Nordic glider very thinned-out section high undercamber Only quality handwork carbon epoxy makes practical trailing edges paper thin technique starting backwards leading edge must employed Brian recommends depitching prop because extra thrust suspect also reason behind Dave Ted using depitched props getting best combination options higher horsepower lower gearing controlled thrust light weight high strength carbon epoxy moldings limit prop development has yet reached Its difficult predict direction next thrust will precision aerobatics application know lighter props would better because gyroscopic effect particularly higher rpm tending towards New resins sophisticated fibers being developed may help technique has tried larger props both B oily some Russians may helpful use hollow blade balsa core blade essentially shell As ponder however wonder pitching procedure heating twisting would work balsa core Ill briefly revisit topic structures reinforce point stress concentration Using carbon fiber strengthen lighten structures should done carefully Free flight competition fliers have discovered too-rigid structure fails high-impact landings Towline gliders have wings break rather flex integrating composite materials consider real purpose change reason behind comments recently heard new Stunter folding wing carbon mat used finishing technique mat applied after model assembled ended just short wing root material applied nitrate dope resulting surface extremely stiff problem set up stress point right wing root already concentration point stiffened wing acted effective lever under load eventually fractured took entire outboard wing point should made wing construction sufficient carry load carbon Enough technology Its time share news about new look old friend venerable Fox 35 some time George Aldrich has thinking about reduce excessive vibration caused heavy iron piston Fox 35 has prototypes ABC cylinder/piston assemblies direct dimensional copies standard Fox setup saw run no doubt significantly reduces vibration hop-up timing changes dont expect fact George hand-fits unit guarantees superior engines aluminum piston running chrome will have lengthy life along low vibration fit makes worthwhile change George offering two options 1 drop-in exchange stock parts can purchase cylinder piston set install yourself 2 can purchase complete engine Contact George Aldrich 12822 Tarrytown San Antonio TX 78233 Tel 210 656-2021 youre like hate build tanks vital part package time-consuming usually requires volume adjustment model conversation Kevin Smith about capabilities fabricate tanks first occasion Ive order Kevin has extensive line tanks needed squeeze much capacity possible short nose section Kevin will bend shells furnish complete tanks dimensions option chose shells could plumb way wanted adjust length suit duration wanted extremely pleased workmanship materials recommend Kevins work highly wont disappointed Contact Smiths Model Products 521 Jansen Avenue San Dimas CA 91773-1617 Tel 909 592-2100 Kevin also has new profile kit available Pathfinder designed well-known flier Gorden Delaney Bart Klapinski recommends design highly give try need good-flying profile IALIST IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM & STOCK PARTS AVAILABLE INDIVIDUALLY COMPETITION ACCESSORIES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF TUBING THREE BRANDS OF GLOW PLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 8 COLORS QUALITY DOPE BRUSHES 5 & 7 LOOP 114 RUBBERBANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1I2A TEXACO PLAYBOY SR KIT 112A TEXACO ENGINES & PARTS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $395 STOCK ORDERS SHIPPED WITHIN 24 HRS October1994 111 OUR REV-UP INVENTORY AVERAGES OVER 9000 PROPSIII IMMEDIATE SHIPMENT VISAJMC 1938 KLOUD KING 72 DELUXE KIT $15996 SPECIFICATIONS Engine 25 40 2 Cy le 40 48 4 Cycle Radio 3 Channel B&M MODEL CO 290 w 1010 N lAYTON UT 84041 PHONE 801544-5609 Sender Call Free Brochure Ann 1005 SHIPPINO/HANDLING UT REO Ann 005% TAX