Control Line WELCOME FORMULA 40 SPEED results final Control Line Contest Board ballot have received 1976-77 Rules Changes expected Formula 40 Speed now official event Maybe Speed fliers will take event serious nowunless want another Formula pilot come down wax again 76 Nats done 1975 Tuned pipes have banned Formula 40 constant diameter pipes allowed maximum length 5 measured cen terline engine best source complete review rules proposals cross proposals have passed will past issues Competition News Some cross proposals stand entirely alone others refer back original pro posal just make alterations original proposals must get gether understand full intent pro posals obvious cursory review vote CLCB 1976-77 Rules Changes relied heavily input various advisory committees does appear people active various events now ones advising rules changes should pass should would appear communications tween competitor AMA CLCB case best have ever eleven CLCB Members voted results especially applicable Speed mostly unanimous Tuned pipes now out Junior Age category Constant diameter pipes allowed Junior Speed events other Profile Proto As understand Profile Proto rule no exhaust extension kind will allowed Also engine now has side-mounted no upright inverted engines allowed Profile Proto Fliers Model rule has changed read age entries may set needle valve fly ship am enthused rules changes can see interest can gene ratedespecially Junior Profile Proto introduced beginners event first place quickly changed hardest events compete Also Formula 40 Speed should highly competi tive event full tuned pipe differ ences between engine set up Rat mula Speed surprisingly minute main advantage Formula 40 Speed ship has over standard Rat weight Most Rats weigh around 31 33 ounces Formula 40 ship should weigh about 24 26 ounces other things equal 7- 9-ounce difference 5 7 mph clocked standing start way Formula 40 clocked will discuss detail future columns set up 40 engine all-out speed partial ly overcome weight disadvantage choose use ship both Rat Form 40 Speed definitely transitional period first time years can see good pos itive changes rules l976-77 look proposals same nature presen ted 1978-79 seasons help Speed Advisory Committee hopefully agreement can reached among flying speed wanting fly speed CLCB regards what good Speed FLEXIBLE TUBING 006 PRESSURE BACKPLATE FILLER TUBES Speed 128 TPI CARE 00 7 CC TANK / U55ELLJE1T PIPED SPEED CARBURETION 5YSTEM DUB JETT @0-19-75 h American Speed Association formation National Speed Associa tion took giant step forward Saturday night October 11th organizational meeting held Memphis prior Sun day contest think goal Speed Society should serve voice competitor vehicle communicates SAC CLCB interested joining fun Speed competition current plight interested preservation Speed competition now know topic conversation hoped representative group areas represented considering time year lack communication disappointed turn out Speed general discussed good bad changes trends NFFS PAMPA NMPRA positive effects organi zations have respective interests discussed time effort required small group people make organization work discussed Needless say everyone interested formation Speed Soci etythat until time volunteers formulate run organization However positive thoughts did surface obvious willing work although no present willing take job organizer general ramrod necessary getting organization type off ground Tom Upton however did volunteer act Newsletter Editor obvious newsletter would back bone such organization know Tom capable handling such large job am enthused background has stepped forward volunteered time next column published hope able report NASA off ground fly ing also hope able tell go about joining now open fresh ideas Phill Bussell regards what others think such asso ciation what goals think society should work towards interested please respond Phill Bussell 4803 Fallon Place Dallas Texas 75227 next column will appear March 1976 issue Model Avia tion hopefully will have enough people willing help get such organization off ground Helpwe need volunteers Keys Speed As discussed last column must ob tam high level consistency before enjoying success limited basis Speed As example Dub Jett has extremely successful shop working tuned pipes engines over past 3 years ever Dubs success field has overpowering because inconsistency carbu retion Dub has never trouble increasing engine horsepower well above stock output ofi test bench 1975 did increase level consistency field As result Brent broke Profile Proto record 9194 Junior Speed record 10958 Dub won Speed 1975 Nats 117 article sketch carburetion system developed Dub used Mikes Brents pipe ships well very simple pressure tank system featuring front needle valve external fuel line Tank pressure taken back plate 006 hole pressure fitting external fuel line must consistency system comes pre-set needle valve Before flying set valve using flying prop fuel Normally setting varies small amount flying session next Also weather climatic conditions have slight effect settings As exam pIe Brents Profile AA Speed ship set shop before trip North Carolina also before going Nationals both times first crack out box ran ex ceptionally fast go out fly officially necessary Dub start engine starter priming engine lean pinching fuel line rich After engine started battery leads removed ship set ground after everything ready have pinch fuel line stage pipe raise engine rpm lower limits pipe stage pipe pre set needle valve takes over valve setting right left keys system working piped engine always runs off low end pipe range four-cycle until pipe staged has because needle setting supplying too much fuel engine run other way After little practice will find system highly consistent will allow flight after flight maximum rpm use Kirn-Kraft 128 thread needle valve However necessary does give us finer tune clicker Cox valve seems wrong place use pressure system larger classes see no reason minor alterations could used advantage both piped nonpiped engines alike Hint decide change anything systemprop plug fuelit will necessary make minor adjustments needle valve setting also 34 Model Aviation