Control Line: Speed

LAST COLUMN told build sim pIe lightweight dolly 21 Sport Speed because some would-be Speed fliers intimidated thought such tricky item Another frightening thing beginners flying pylon Its difficult Ill give few hints suggestions allow quickly overcome fears become accomplished Speed flier no time flat Ive shown several modelers obtain good pylon technique Few have problems First start two-line model After youre accomplished monoline lot easier Take look photo Bill Hughes standing takeoff position left hand pylon right hand holding handle eyes air plane Thats important pointkeep eyes airplane After pit crew releases model lead little keep lines tight give little up ele vator lift out dolly keep hold pylon Keep eyes airplane walk around pylon until get model fly ing Once youve leveled off airplane flying nice smooth just let right hand come around settle fork don t look down pylon model usually goes splat ground Practice few times airplane Its simple set hand fork look ing long youre already holding eliminate searching pylon after takeoff try method Bill Hughes 1990 US FAI Speed team member shows hold pylon left hand can always keep eyes model left hand Put plenty fuel youre hurry concentrate flying airplane getting hand pylon face pylon Look photo Bill pylon close left side leaves feet free walk around pylon dont have jump hop around dont get turned around going back wards Keep body close can pylon reduce number steps necessary keep up airplane Practice Just take stick broom handle etc glue cardboard balsa fork end Dont stick ground hold walk around quickly putting force Too Speed fliers really bear down py lon putting terrific strain both on themselves Learn proper technique tuck ing fork flying hand against side will easy Try different heights pylon fork Usu ally its easier fly out tall pylon about shoulder level Take stopwatch time yourself can go around seven times 12 seconds thats equivalent 150 mph Remember dont take eyes off air plane August mentioned some new technology thats coming use Ive just finished new piston Rossi 21 using aluminum alloy called metal matrix Its wear resistant carbide tool bits can barely machine diamond bits better Life expectancy should greatly increased dont know coefficient thermal expansion will match brass sleeve might necessary make sleeve Out same material chrome plate should have performance data next column predict metal matrix material will next giant step forward long-lasting pis tons conrods maybe bearings too Ball bearings will ceramic rated rpm life time far beyond what using now several types material Ill keep posted developments try works dolly 21 Sport Speed read last column youll remember said going modify dolly cause hanging up airplane moved airplane back about half inch its pre vious position get wing farther away hold-down clamp pivot added leverage allows dolly drop freely away sketch magazine already variation drawn can follow design Other types dollies work too some mod elers use locating pins instead mousetrap clamps Flying sites always perfect prefer lock-on dolly little security reliability Congratulations Frank Garzon Jr holder new 21 Sport Speed record Frankie turned time 1203 seconds 149-plusmph speed Indianapolis contest June 2 used OPS engine Kelly fiberglass 6 x 6 prop Frank Sr right behind him 1206 seconds Bob Ytuarte flight over 151 mph couldnt back up first flight Ive seen over 150 mph Bob also put up nice flight Formula 40 over 160 mph using SuperTigre engine Nelson-Shadel AAC sleeve piston Nats just two weeks away now next column should have some information Speed flying 64 Model Aviation Control Lbe Speed Glenn Lee 819 Mandrake Bauvla IL 60510 After airplane flying have grooved just bring handle fork Note pylon quite high near Bills left side allow him easily walk around keep up model Re member never take eyes off planel Bob Ytuarte Brentwood NY after fine 151-pius-mph flight 21 Sport Speed plane model uses Rossi engine Kelly fiberglass 5% x 6 prop painted bright yellow good visibility Bob could nt repeat flight within 5mph record Fred Randeil Canal Fuiton OH Speed Event Director 1990 Nats has experimenting composite tuned pipes Carbon fiber strong stiff lightweight its being used CL Aerobatics ex cellent results highly temperature-resist ant epoxy used bond carbon cloth