Control Line RA CING John Ballard DIMENSIONAL STABILITY aluminum have several inquiries concerning proper aluminum alloy can utilized produce various parts racing engines such connect ingrods front hearing housings heads quick look available literature indicates alloy7075-T6has exceptional strength have people recommend particular alloy know commercially available rods parts made observ ing typical tensile properties graph materials handbook finds definitely 7075-T6 exceptionally strong room temperature rapidly decreases strength temperature increases As know unusual intemal engine temperatures between 25004000 F instance yield strength of7075-T6 13000 pounds per square inch 4000 F whereas aluminum alloy 2024-T3 has yield strength approximately 22000 psi same temperature addition have asked about stabiliz ing machined aluminum parts reduce warping After rough machining generally heat part 3500 4000 eight hours air cool After finish machining put part oven 1750 F 24 hours think critical intemal parts connecting rod Recently higher nitro higher-rpm running typical racing engines have seen failures 1982 Nats saw competitor rod detonated approximately five pieces warm ing engine start Slow Rat event Rossi engine rework response requests some Rossi 15 engine rework have found some notable improvements performance silver-soldering extension liner installing blow-by ports both piston liner just below transfers have found increases approximately 1000 rpm using modification have also found retiming crank newer 1981 model Rossi 1 5by silver soldering crank reducing closing side timing approximately 640—will result increased per formance also turned down small band replaces band stock Rossi crank carefully installing crank band slightly better fuel flow developed addition use 040 aluminum band prone loosening crank stock 020 band installed factory Finally piston liner must virtually perfectly round slight taper near top dead center maximum power output engine have found bore gauge measures accurately 0001 enables liner honed round possible Tank shape Slow Rat have several letters asking ideaF shape tank used consistent-running Slow Rat Sep tember 19821 attended contest Milwaukee WI time observed several types Slow Rat tank arrangements found shapes tanks chicken hopper variety Appar ently didnt make difference what shape inboard tank outboard tank line needle valve generally square contiguration also found competitors utilizing Perfect Veco home-constructed tanks both inboard outboard tank Since chicken hopper tank requires reservoir tank inboard side Continued page 143 January 1983 65 Fascinating tips tuning Rossi 15 text Small photo top left shows stock LI modified RI piston/sleeve sets Note sleeve has lengthened downwardl silversoldered extension blow-by ports added to piston Large picture bore gauge John uses make sure cylinders roundl Lower small pic shows stock LI modi fied RI cranks Mods include retiming intake new aluminum crankband info column Various Slow Rat tanks Above Left triangular inboard tanka uniflow vent protrudes front cover finger filling tank prime enginel engine sports swing-weight carb attached venturi Above Right Three hands two pitmen tank 3%-az Perfect unit modified uniflow Below Left Outboard rectangular uni flow tank quick-fill worked quite satisfactorily Below Right An inboard rectangular tank uniflow tube coming out sidelots drag worked well MASIER AIRSC1IIW PRESENTS BALSA STRIPPER A95 9AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOL GREAT PRICE WINDSOR PROPELLER CO 384 Tesconi Ct. Santa Rosa CA 95401 W4AGEMENT AR 39 USC 3655 TION Tsuda and course whole bunch incisive cartoons Will Nakashima put perspective come NFFS Hall Fame awards Ten Model Year awards followed compilation who-won-whatLEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW M3SWV bLSb6V RAASTER AIR IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE G/F SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS 384 Tesconi Ct and-when going back year indexes previous Sympo reports Wrap-up list NFFS Plans Publications unfortun ately current Order report Fred Terzian 4858 Moorpark Ave San Jose CA 95129 Price $10 NFFS members purchasers outside USA $11 others Postage $2 Fourth Class $3 Air Mail Canada Mexico $5 Air Mail Europe $6 Air Mail Far East wonder means like Detroit Bob Meuser 4200 Gregory St Oakland CA 94619 CL Racing/Ballard Continued page 65 feed tank outboard side profile fuselage tank choice competitors utilizes Uniflo principle majority tanks rectangular shape installed inboard side fuselage flier utilizes swing weight needle valve minimize transition between takeoff terminal air speed 1982 Rules Proposals have recently received some mail competitors concerning some proposed rule changes certainly has some merit 0%-nitro rule Editors note proposal No CL-84-22 See De cembers Competition Newsletter rules pro posal summaries RMcM would limit available nitro content Slow Rat event 10% nitro would furnished Contest Director competitor would assessed small fee cover fuel cost think WINDSOR PROPELLER CO Santa Rosa CA 95401 competitors Slow Rat using about 50-60% nitro fuelwhich certainly causes fuel consumption particular event excessive good 20% fuel used spilled ground filling tank during numerous test starts initial start three pit stops required feature 140-lap race two pit stops required 70-lap qualifying heats would like hear views 10% nitro rule John C Ballard 10102 Kimblewick Dr Louisville KY 40223 AMA Building/Mankowski Continued page 53 kay RC Modelers Camarillo Flying Circus Fresno Radio Modelers Anthony Novak James Thornberry Evansville RC Model Airplane Club Renewal message another opportuni ty help Building Fund AMA renewal forms sent 1982 member has place add contribution drive hope everyone uses because everyone gave just $10 building could paid off completely Its important renew early too listing 1983 AMA members signed up December 15 1982 will used wall cov ering new building show AMA members building completed Renew earlydont get left out Vince Mankowski Assistant Executive Director January 1983 143 CONTROLIKE TINIS PROFILE0COMBA ThRA T WIDE & NARROW WEDGE 75 -- 6 Capacities UNIFLOW & BTINDD Custom Dliii Fuels Ingredients detailed brochure50C stamps/check CAROLINA TAFFINDER 8345 Delhi Road Charleston Hgts. SC 29405 Introducing . New HIGH-PERFORMANCE HIGH-STARTS! Cat #S-13 1 Deluxe Super-Duty Hi-Start Cat #S-14 E Deluxe Shofl Field HI-Stan Cat #9-131 1 Replacement Latex Tubing Super-Duty Hi-Start Cat #S-141 [1 Replacement Latex Tubing Short Field HI-Start SUPER-DUTY LAUNCH 100 Wingapana Greater SHORT FIELD LAUNCH Daaigned Limited Space Standard Clasa SalIplanes Smaller COMPLETELY ASSEMBLED READY TO USE Paul Clements KTTT KIWI MODELI RR 2 P011 End 47454 wrne t.n oatco-360l 723-3480
Edition: Model Aviation - 1983/01
Page Numbers: 65, 143
Control Line RA CING John Ballard DIMENSIONAL STABILITY aluminum have several inquiries concerning proper aluminum alloy can utilized produce various parts racing engines such connect ingrods front hearing housings heads quick look available literature indicates alloy7075-T6has exceptional strength have people recommend particular alloy know commercially available rods parts made observ ing typical tensile properties graph materials handbook finds definitely 7075-T6 exceptionally strong room temperature rapidly decreases strength temperature increases As know unusual intemal engine temperatures between 25004000 F instance yield strength of7075-T6 13000 pounds per square inch 4000 F whereas aluminum alloy 2024-T3 has yield strength approximately 22000 psi same temperature addition have asked about stabiliz ing machined aluminum parts reduce warping After rough machining generally heat part 3500 4000 eight hours air cool After finish machining put part oven 1750 F 24 hours think critical intemal parts connecting rod Recently higher nitro higher-rpm running typical racing engines have seen failures 1982 Nats saw competitor rod detonated approximately five pieces warm ing engine start Slow Rat event Rossi engine rework response requests some Rossi 15 engine rework have found some notable improvements performance silver-soldering extension liner installing blow-by ports both piston liner just below transfers have found increases approximately 1000 rpm using modification have also found retiming crank newer 1981 model Rossi 1 5by silver soldering crank reducing closing side timing approximately 640—will result increased per formance also turned down small band replaces band stock Rossi crank carefully installing crank band slightly better fuel flow developed addition use 040 aluminum band prone loosening crank stock 020 band installed factory Finally piston liner must virtually perfectly round slight taper near top dead center maximum power output engine have found bore gauge measures accurately 0001 enables liner honed round possible Tank shape Slow Rat have several letters asking ideaF shape tank used consistent-running Slow Rat Sep tember 19821 attended contest Milwaukee WI time observed several types Slow Rat tank arrangements found shapes tanks chicken hopper variety Appar ently didnt make difference what shape inboard tank outboard tank line needle valve generally square contiguration also found competitors utilizing Perfect Veco home-constructed tanks both inboard outboard tank Since chicken hopper tank requires reservoir tank inboard side Continued page 143 January 1983 65 Fascinating tips tuning Rossi 15 text Small photo top left shows stock LI modified RI piston/sleeve sets Note sleeve has lengthened downwardl silversoldered extension blow-by ports added to piston Large picture bore gauge John uses make sure cylinders roundl Lower small pic shows stock LI modi fied RI cranks Mods include retiming intake new aluminum crankband info column Various Slow Rat tanks Above Left triangular inboard tanka uniflow vent protrudes front cover finger filling tank prime enginel engine sports swing-weight carb attached venturi Above Right Three hands two pitmen tank 3%-az Perfect unit modified uniflow Below Left Outboard rectangular uni flow tank quick-fill worked quite satisfactorily Below Right An inboard rectangular tank uniflow tube coming out sidelots drag worked well MASIER AIRSC1IIW PRESENTS BALSA STRIPPER A95 9AT YOUR DEALER PRECISION STRIP WOOD TO x INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOL GREAT PRICE WINDSOR PROPELLER CO 384 Tesconi Ct. Santa Rosa CA 95401 W4AGEMENT AR 39 USC 3655 TION Tsuda and course whole bunch incisive cartoons Will Nakashima put perspective come NFFS Hall Fame awards Ten Model Year awards followed compilation who-won-whatLEADER IN SMALL AIRFOIL TECHNOLOGY MASTER AIRSCREW M3SWV bLSb6V RAASTER AIR IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE G/F SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS 384 Tesconi Ct and-when going back year indexes previous Sympo reports Wrap-up list NFFS Plans Publications unfortun ately current Order report Fred Terzian 4858 Moorpark Ave San Jose CA 95129 Price $10 NFFS members purchasers outside USA $11 others Postage $2 Fourth Class $3 Air Mail Canada Mexico $5 Air Mail Europe $6 Air Mail Far East wonder means like Detroit Bob Meuser 4200 Gregory St Oakland CA 94619 CL Racing/Ballard Continued page 65 feed tank outboard side profile fuselage tank choice competitors utilizes Uniflo principle majority tanks rectangular shape installed inboard side fuselage flier utilizes swing weight needle valve minimize transition between takeoff terminal air speed 1982 Rules Proposals have recently received some mail competitors concerning some proposed rule changes certainly has some merit 0%-nitro rule Editors note proposal No CL-84-22 See De cembers Competition Newsletter rules pro posal summaries RMcM would limit available nitro content Slow Rat event 10% nitro would furnished Contest Director competitor would assessed small fee cover fuel cost think WINDSOR PROPELLER CO Santa Rosa CA 95401 competitors Slow Rat using about 50-60% nitro fuelwhich certainly causes fuel consumption particular event excessive good 20% fuel used spilled ground filling tank during numerous test starts initial start three pit stops required feature 140-lap race two pit stops required 70-lap qualifying heats would like hear views 10% nitro rule John C Ballard 10102 Kimblewick Dr Louisville KY 40223 AMA Building/Mankowski Continued page 53 kay RC Modelers Camarillo Flying Circus Fresno Radio Modelers Anthony Novak James Thornberry Evansville RC Model Airplane Club Renewal message another opportuni ty help Building Fund AMA renewal forms sent 1982 member has place add contribution drive hope everyone uses because everyone gave just $10 building could paid off completely Its important renew early too listing 1983 AMA members signed up December 15 1982 will used wall cov ering new building show AMA members building completed Renew earlydont get left out Vince Mankowski Assistant Executive Director January 1983 143 CONTROLIKE TINIS PROFILE0COMBA ThRA T WIDE & NARROW WEDGE 75 -- 6 Capacities UNIFLOW & BTINDD Custom Dliii Fuels Ingredients detailed brochure50C stamps/check CAROLINA TAFFINDER 8345 Delhi Road Charleston Hgts. SC 29405 Introducing . New HIGH-PERFORMANCE HIGH-STARTS! Cat #S-13 1 Deluxe Super-Duty Hi-Start Cat #S-14 E Deluxe Shofl Field HI-Stan Cat #9-131 1 Replacement Latex Tubing Super-Duty Hi-Start Cat #S-141 [1 Replacement Latex Tubing Short Field HI-Start SUPER-DUTY LAUNCH 100 Wingapana Greater SHORT FIELD LAUNCH Daaigned Limited Space Standard Clasa SalIplanes Smaller COMPLETELY ASSEMBLED READY TO USE Paul Clements KTTT KIWI MODELI RR 2 P011 End 47454 wrne t.n oatco-360l 723-3480