Control Line RA CING John Ballard IMPROVEMENT airspeed subject month have several letters con cerning apparent inability racing com petitors get airspeeds up corn petitive level Subsequent correspondence has indicated engine horsepower propeller combinations creating proper thrust achieve competitive yelocities Whats holding back major hindrance airspeed engine vi bration dont see much Rat Racing event since believe com petitors using Harters magnesium pan virtually eliminates powerrobbing engine vibrations Unfortunately profile-style racers such Slow Rat Scale Racing Sport Rac ing Big Goodyear etc have engine mounted wooden fuselage whichat besthas aluminum magnesium mounting plate reduce vibration can recall years ago before Slow Rat came professional Sport Race enthusi asts using Sterling kits such Mustang Yak-9 Ringmaster Veco Tomahawk PDQ Circus Clown found though airplanes significant resemblance other Tomahawk Ringmaster seemed have better airspeed other kits racing applications found length fuselage front wing section front engine shortest kits two After much experimentation found extending motor mount another three four inches fuselage ad ditional airspeed could realized same engine moved plane plane difference being shorter nose moment beefed-up enginemounting area included replacing A6-in 2-ply Vt-in plywood doublers five-ply 3¼2-in plywood modifications incorporated other kits airspeeds increased alsobut dramatically shorter-noseContinued page 164 Above LI see anotner prop-nipping technique horizontal smash Slow Rat has prop toiward 12 oclockl hipping posi tion pitman has hand well back get lot force behind flip one-try starting right see really solid applecheek cowl Scale Racerit helps reduce engine vibration profile fuselage Below L pitman Dan Cranfill careful release Texas Slow Rat plane exactly perpendicularnot pointed outto pilot will save much grief pilot right see off-compression backward prop-flip force applied smartly near prop hub engine bounces off compression hope one-flip start Note strange design model Look closelyits Sport Scale atomic missile-carrying submarine forward fin subs sailand ha little nericoDes too 76 Model Aviation Pitman Frank Williams has lifted Racer off ground can get enough force behind prop-flip start engine first try Right hand gloved safety Hi Im ART GROSS know some have wondering WHAT IN HELL IS WEDGE LOCK Well will tell hand sanding block made out HIGH IMPACT STYREMEIF IT EVER BREAKS WE WILL REPLACE IT FREE uses belts same size 3x18 Electric Hand Sanders might ask WHY use expensive belts instead using cheaper sandpaper block sanding WHY BECAUSE BELTS ARE MORE DEPENDABLE ECONOMICAL DURABLE AND EASIER TO USE glueing tacking clamping pieces sandpaper other block BELT WILL NOT SLIP WRINKLE OR TEAR CAUSING THE MARKING AND GOUGING OF YOUR FINISHED WORK 1-RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 sheets regular sandpaper sandpaper sanding block can waste up 440/0 its sandpaper just fasten itself block BELTS ARE EASILY CHANGED THEY ARE PUT ON AND TAKEN OFF BLOCK WITHOUT DAMAGE SO THEY ARE REUSABLE FOR MANY JOBS SINCE THE BELT IS SO EASILY CHANGED IN SECONDS YOU PICK THE RIGHT BELT TYPE & GRIT SIZE TO MAKE YOUR SANDING JOB EASIER WE THINK THE WEDGE LOCK SANDING BLOCK IS THE BEST YOU CAN BUY BUT WE ALSO KNOW SINCE YOU HAVE NOT USED ONE YOU MIGHT NOT AGREE WE WILL PUT OUR MONEY WHERE OUR MOUTH IS GET ONE AND USE IT AND THEN IF YOU DO NOT AGREE WITH US AND WANT YOUR MONEY BACK WE WILL BE HAPPY TO GIVE IT BACK TO YOU MODELERS ASK YOUR HOBBY SHOP FOR WEDGE LOCK HOBBY SHOP DEALERS ASK YOUR DISTRIBUTORS FOR IT DISTR ART GROSS ENTERPRISES 206 743-9332 $1000 COUPON SPECIAL $1000 Please fill out coupon mailing label circle 3 extra RESIN BONDED BELTS want will send prepaid 1-WEDGE LOCK SANDING BLOCK comes 80 grit cloth belt & 3 RESIN BONDED REPLACEMENT BELTS THIS IS $1400 value $1000 BLOCK -$600 s @ 0200 -- postageS haedlirsg $1400 $1000 COUPON SPECIAL $1000 BELTS ALUMINUM OXIDE 80-100-1 20-1 50-1 80-220 SILCON CARBIDE 220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 touch-and-go taxi engine shutoff bomb tank drop flaps Flight QualificationsModel must come airborne within three minutes start prop flipping Three attempts will given make two official flights An ad ditional minute starting time will allowed additional engine bonus 10 points will given getting air borne minute single-engine mod els within two minutes twin-engine models additional minute allowed additional engine multi-engine models will receive extra 10 points engines remain running through 10 qual ifying laps Maximum score can achieved static flight would 250 Flying Line Safety Requirements same listed AMA rule book scale models weighing up 8 lb George Bill go say reason came up own set rules profile event twofold GSCBs multi-interest CL club heavy terest Stunt sport flying Scale Carrier run close second Scale mod elers club thought type event would make good starting point modelers interested Scale and/or Stunt hesitant construct full-bodied model time As can see GSCB rules thing quite simple point Items such I-in-thick-maximum fuselage up 10 flying options would satisfy sport competitive fliers regardless primary CL interest bonus multi-engine fanatic will also note static judging distance 10 ft felt greater viewing distance would less effective judg ing standpoint because general size available profile models speaking availability pro file models small list readily available several manufac turers MidwestP -40 erschmitt Aira cobra SterlingYAK-9 P-38 P-5l GoldbergP-40 Buster Cosmic Wind Shoestring cant find model build among available might time try efforts designing building own Profile George Bill conclude thoughts Profile Scale hope GSCB event will interest other clubs will some small way help promote Scale activity 1984 event held first time GSCBs annual Teterboro NJ Scale Model Flying Show last September 1983 See accompanying photos some models entered new event Now building season winter months has underway some time parts country Scale builders should have new supply ideas tips perhaps some photos new proj ects would great would share fellow CL Scale modelers Send items Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Speed/Hempel Continued paqe 75 needle adjustments b-turn increments important single thing pilot will need master capability finetune engine flight very simple model flying level approximately three four ft altitude engine run ning slightly rich maneuver model up about 15 ft will cause engine lean out After about 11/2 2 laps bring model back down level flight en gine tends go rich again turn needle shut /o-turn before next flight Repeat procedure until engine holds con stant setting level flight Closing comments No sets speed mark solely himself requires tal ents assistance people am fortunate have endowed friendship expertise such people Frank Garzon Les Baer Gene Hempel fabulous pilot George Brown others have helped make happen Service materials Piston Blanks Performance Model Parts Inc 12233 South 1565 East Draper UT 84020 G Dye Pis ton MachiningPrecision Metal & Grind ing RD #2 Box 54-A Minesite Rd Allen town PA 18103 L Baer Chrome Plat ing Honing OPS Engine PartsP&G Metal Shop 301 North Yale Dr Garland TX 75047 G Hempel During 1983 contest season using setup Nick Sher placed first 83 Nats 20435 mph first Dayton OH Cold Cash Speed Bash September 10-11 20816 mpha new AMA National Record hope series engine tuning tanks etc will encourage modelers compete Speed events real challenge require lots experimentation success comes mastery small skills Gene Hempel 301 N Yale Dr Garland IX 75047 CL Racing/Ballard Continued page 76 momented models first re luctance use shorter-nose models cause problem getting large enough fuel tank between engine wing leading edge As time went Veco came out profile tank series improved situation addition Veco profile tanks larger mount ing area typical rectangular wedge tanks consequently tank vibrated foamed less mounted profile fuselage 164 Model Aviation 0600 GOOD VALUE LOMES WITH 80 GRIT CLOTH SANDING BELT THE SANDING BLOCK THAT WEARS BELT TOLEDOI84 THIRTIETH ANNUAL RIO EXPOSITION TOLEDO SPORTS ARENA Reserve April 6 7 81984 attend worlds greatest radio control model show See latest greatest radio control equipment presented leading manufacturers Talk notable nc personalities have questions answered featuring worlds largest Swap Shops no dealers complete refreshment centers Saturday Night auction raffles complete nc systems accessories acres free parking %4 Weak Signals RIO Club ONE MAIN STREET TOLEDO OHIO Bring latest completely finished models display enter competition ex citing awards Competition models will accept during show hours till 10 am Sunday morning no entry fee Complete radio control systems will awarded first second third place winners brand new Microwave Oven will presented lucky winner Best Show Come join us enjoy selves unquestionably worlds greatest radio control model show Open public three great days PO Box 5772 N APRIL 6 7&8 FRIDAY9amto6pm SATURDAY 9amto6pm SUNDAY9amto43Opm Toledo Ohio 43613 vibration-sensitive racing air craft Scale Race planes highpowered 15 engines used today cause enormous vibration ground rpm 22000-27000 range certainly easy vibration consequently airspeed loss generated help eliminate problem have using -in-thick profile fuselages consequently 1/2 -in hard maple engine mounts Care wood selection fuse lage also important After using plywood doublers have found use extremely stiff applecheek fairing opposite side engine run ning down underneath top wing section certainly reduces vi bration am enclosing photograph show ing applecheek design minimize engine vibration subsequent loss airspeed use two-component epoxy glue entire front section racer cover glass cloth add further stiffening properties several test ing sessions have found same engine switched between otherwise identical aircraft would lose three seconds airspeed per seven laps merely because fuselage vibration Proper pitting procedures improve race times Another method improving race time have fastest possible pit stops including releasing aircraft pilot may merge traffic slack lines unfortunate tumbles aircraft due pitmans improper release imperative pitman releasing aircraft release straight mode turned toward pilot pointing toward outside circle know competitors feel important allow aircraft pointed away pilot Unfortunately let go pilot starts pull lines model has tendency whipped back toward pilot cases lines have tendency go slack catch grass cause chipped propeller torque roll toward center pilots circle have enclosed photo graph showing pitman aligning model released perpendicular pilot pointed out competitors have problems starting racing aircraft either initial start during pit stops Assuming engine has proper compression right amount fuel good glow plug battery other factors control one-flip starts aircraft small landing gear somewhat short cases better raise aircraft off surface pitman can get good swing propeller am enclos ing photograph showing pitman hold ing aircraft up can flip prop backward enough substantial force restart engine Slow Rat Sport Race areas recent years have found very ben eficial incorporate slightly longer onewheel gear assembly allow pitman SILICO no NEgaSO ne 10 foot coils TUBING ID 062 092 125 us POST $/coiI 235 265 325 54l/COIL LARRY DODGE AERO INC 10210 MANNINGSTILLWATER MN 55082 Apil1984 165 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Safe Flying No Accident PAW DIESELS Englands Finest 049 35 New low low prices Send $100 list Eric Clutton Rt 4 Box 1109C Edmond OK 73034 -SCALE DOCUMENTATION/ SCALE DRAWINGSMODEL PLANS HOTOS BOOtS TECH 1984 AIRPLANERN ON CATA LOG48500 MC KENZIE HWY $300VIDA OREGON 97488 enough clearance properly strike pro peller am enclosing two photographs showing different methods starting method flip engine forward having compression set pro peller blade two oclock position slapping propeller extremely hard engine starts flip Another method flip engine backwards strik ing propeller very close hub propeller must set horizontal parallel ground method produce satis factory results Certainly pilot must job bringing plane substantial speed getting out pits back air shortest possible interval time certainly cannot emphasize impor tance thorough complete practicing improve overall race times Know racing-circle markings Finally find competitors mark off standard circle AMA specifications use practice cases flying school parking lots etc impera tive use either chalk spray paint owner will allow mark off proper center circle landing circle pitting area Practicing under standard circle conditions improves relationship between pilot pitman since landings takeoffs done same circle atmosphere will used under competitive situa tions NEW Tartan Twin Muffler Set Allows adjustment carb running $3995 400 RPM increase over stock As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Electrics/Kopski Continued aoe 82 weight saving quarter ouncing because wings dont fold tips Two additional balsa spars used top bottom about halfway between main spars trailing edge latter spars can partial span so-called stub spars Like main spar pair stub spars also webbed part length Usually bottom spar stub pair continued full span supporting ribs use stub spar seems like obvious extension now-common main I-beam some reason commonly used departure established prac tice light easy adds great deal strength high aspect ratio wings stub spars may bit unusual big difference comes now four spars get spruce doublers staggered length beginning root extending outward along main panels stopping dif ferent rib stations minimizes amount comparatively heavy material putting its strength will gooddistributed step-wise center outward Most Sailplane wings sim 3-FUNCTION ACCUETACH ITM Lb LCD Tachometer w/dual scale capability lOX bOX @ Digital Voltmeter load /5 && checking/cycling TX/RX battery combos ACCU-TACHI torquick charging operation w~9 7 9aitt Send check Noror money order Ca t add 600 tax PO Box 70956 AVIONRSS Sunnyvale CA INC94086 ply use spruce way sparstrue indiscretion true overkill inverted quarter ouncing Lets describe example Its Spec tra Soar wing 8-in chord 67-in span rectangular planform poly dihedral main panels 20 long tip panels 13 ribs spaced 21/2 relatively light Ak balsa four hard balsa spars Vt X /4 main pair goes full span although balsa used tip panel spars also rela tively light stub spar structure 121/2 long five ribs main spar webbing covers four ribs stub spar webbing three spruce spar doublers square glued alongside balsa spars bottom main spar doubler five ribs long top four ribs long bottom stub spar doubler three ribs long top two ribs long particular example spruce doubler spars located TE side balsa spars full-depth Vik ply wood dihedral barces 2-in length glued spruce pieces form super strong center dihedral joint short dihedral brace also used behind balsa leading edge wing center planked over rib bay panel iA6 balsa top bottom done before dihedral joint made allowing mating surfaces snded flat tight fit maximum spar planking end-grain contact produce truly strong dihedral Continued page 168 Fine Quality Flying Models ~_5~ V Catalog $150 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 444e 44 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 166 Model Aviation PK PRODUCTS Specializing Quadra/Zenoah Sales Service PO Box 6226 Hayward CA 94544 Tel 415 5B1-4277 Eves H & K Superstarters Q-35$2995 Q-50$2995 MAG II$3495 Super Hustler$3495 Zenoah$2995 Tartan Twin$3995 DEALER INQUIRIES IN V/TED ALL ORDERS ADD $150 POSTAGE & HANDLING CALIF RES ADD SALES TAX TV GLOW lire cdl PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson Associates PO Box 151E~ Since 7948 Wayne NJ 07470 Perma-Grit Litetime * Carbide Sanding Tools Tungsten Carbide grit est material next diamond Tungsten carsido grit brazed steel 9 long tool use no balsa hardwooOs bborglass beaded foamo epooc fliers pleoiglasAcerago Meeters Use excellent tools modeler can use Don Dowe Professional Engineer Made USAr-tOO i1a2r C,riIri,$051 i-br Fin$655 Ask hour Dealer send cheekF-IllFiat C,$051 o MO No COOsI soC-Ill Fdiur Ca,eIFi,$055 otot irtOtS DG Productso-2eaoorco,JF,5625 209 carriands Driveella rCun/Fitnns Dayton OH 45429 r-n,ed-CoelFrnesass 15131 294-1192 residents oddt%tao
Edition: Model Aviation - 1984/04
Page Numbers: 76, 164, 165, 166
Edition: Model Aviation - 1984/04
Page Numbers: 76, 164, 165, 166
Control Line RA CING John Ballard IMPROVEMENT airspeed subject month have several letters con cerning apparent inability racing com petitors get airspeeds up corn petitive level Subsequent correspondence has indicated engine horsepower propeller combinations creating proper thrust achieve competitive yelocities Whats holding back major hindrance airspeed engine vi bration dont see much Rat Racing event since believe com petitors using Harters magnesium pan virtually eliminates powerrobbing engine vibrations Unfortunately profile-style racers such Slow Rat Scale Racing Sport Rac ing Big Goodyear etc have engine mounted wooden fuselage whichat besthas aluminum magnesium mounting plate reduce vibration can recall years ago before Slow Rat came professional Sport Race enthusi asts using Sterling kits such Mustang Yak-9 Ringmaster Veco Tomahawk PDQ Circus Clown found though airplanes significant resemblance other Tomahawk Ringmaster seemed have better airspeed other kits racing applications found length fuselage front wing section front engine shortest kits two After much experimentation found extending motor mount another three four inches fuselage ad ditional airspeed could realized same engine moved plane plane difference being shorter nose moment beefed-up enginemounting area included replacing A6-in 2-ply Vt-in plywood doublers five-ply 3¼2-in plywood modifications incorporated other kits airspeeds increased alsobut dramatically shorter-noseContinued page 164 Above LI see anotner prop-nipping technique horizontal smash Slow Rat has prop toiward 12 oclockl hipping posi tion pitman has hand well back get lot force behind flip one-try starting right see really solid applecheek cowl Scale Racerit helps reduce engine vibration profile fuselage Below L pitman Dan Cranfill careful release Texas Slow Rat plane exactly perpendicularnot pointed outto pilot will save much grief pilot right see off-compression backward prop-flip force applied smartly near prop hub engine bounces off compression hope one-flip start Note strange design model Look closelyits Sport Scale atomic missile-carrying submarine forward fin subs sailand ha little nericoDes too 76 Model Aviation Pitman Frank Williams has lifted Racer off ground can get enough force behind prop-flip start engine first try Right hand gloved safety Hi Im ART GROSS know some have wondering WHAT IN HELL IS WEDGE LOCK Well will tell hand sanding block made out HIGH IMPACT STYREMEIF IT EVER BREAKS WE WILL REPLACE IT FREE uses belts same size 3x18 Electric Hand Sanders might ask WHY use expensive belts instead using cheaper sandpaper block sanding WHY BECAUSE BELTS ARE MORE DEPENDABLE ECONOMICAL DURABLE AND EASIER TO USE glueing tacking clamping pieces sandpaper other block BELT WILL NOT SLIP WRINKLE OR TEAR CAUSING THE MARKING AND GOUGING OF YOUR FINISHED WORK 1-RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 sheets regular sandpaper sandpaper sanding block can waste up 440/0 its sandpaper just fasten itself block BELTS ARE EASILY CHANGED THEY ARE PUT ON AND TAKEN OFF BLOCK WITHOUT DAMAGE SO THEY ARE REUSABLE FOR MANY JOBS SINCE THE BELT IS SO EASILY CHANGED IN SECONDS YOU PICK THE RIGHT BELT TYPE & GRIT SIZE TO MAKE YOUR SANDING JOB EASIER WE THINK THE WEDGE LOCK SANDING BLOCK IS THE BEST YOU CAN BUY BUT WE ALSO KNOW SINCE YOU HAVE NOT USED ONE YOU MIGHT NOT AGREE WE WILL PUT OUR MONEY WHERE OUR MOUTH IS GET ONE AND USE IT AND THEN IF YOU DO NOT AGREE WITH US AND WANT YOUR MONEY BACK WE WILL BE HAPPY TO GIVE IT BACK TO YOU MODELERS ASK YOUR HOBBY SHOP FOR WEDGE LOCK HOBBY SHOP DEALERS ASK YOUR DISTRIBUTORS FOR IT DISTR ART GROSS ENTERPRISES 206 743-9332 $1000 COUPON SPECIAL $1000 Please fill out coupon mailing label circle 3 extra RESIN BONDED BELTS want will send prepaid 1-WEDGE LOCK SANDING BLOCK comes 80 grit cloth belt & 3 RESIN BONDED REPLACEMENT BELTS THIS IS $1400 value $1000 BLOCK -$600 s @ 0200 -- postageS haedlirsg $1400 $1000 COUPON SPECIAL $1000 BELTS ALUMINUM OXIDE 80-100-1 20-1 50-1 80-220 SILCON CARBIDE 220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 touch-and-go taxi engine shutoff bomb tank drop flaps Flight QualificationsModel must come airborne within three minutes start prop flipping Three attempts will given make two official flights An ad ditional minute starting time will allowed additional engine bonus 10 points will given getting air borne minute single-engine mod els within two minutes twin-engine models additional minute allowed additional engine multi-engine models will receive extra 10 points engines remain running through 10 qual ifying laps Maximum score can achieved static flight would 250 Flying Line Safety Requirements same listed AMA rule book scale models weighing up 8 lb George Bill go say reason came up own set rules profile event twofold GSCBs multi-interest CL club heavy terest Stunt sport flying Scale Carrier run close second Scale mod elers club thought type event would make good starting point modelers interested Scale and/or Stunt hesitant construct full-bodied model time As can see GSCB rules thing quite simple point Items such I-in-thick-maximum fuselage up 10 flying options would satisfy sport competitive fliers regardless primary CL interest bonus multi-engine fanatic will also note static judging distance 10 ft felt greater viewing distance would less effective judg ing standpoint because general size available profile models speaking availability pro file models small list readily available several manufac turers MidwestP -40 erschmitt Aira cobra SterlingYAK-9 P-38 P-5l GoldbergP-40 Buster Cosmic Wind Shoestring cant find model build among available might time try efforts designing building own Profile George Bill conclude thoughts Profile Scale hope GSCB event will interest other clubs will some small way help promote Scale activity 1984 event held first time GSCBs annual Teterboro NJ Scale Model Flying Show last September 1983 See accompanying photos some models entered new event Now building season winter months has underway some time parts country Scale builders should have new supply ideas tips perhaps some photos new proj ects would great would share fellow CL Scale modelers Send items Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Speed/Hempel Continued paqe 75 needle adjustments b-turn increments important single thing pilot will need master capability finetune engine flight very simple model flying level approximately three four ft altitude engine run ning slightly rich maneuver model up about 15 ft will cause engine lean out After about 11/2 2 laps bring model back down level flight en gine tends go rich again turn needle shut /o-turn before next flight Repeat procedure until engine holds con stant setting level flight Closing comments No sets speed mark solely himself requires tal ents assistance people am fortunate have endowed friendship expertise such people Frank Garzon Les Baer Gene Hempel fabulous pilot George Brown others have helped make happen Service materials Piston Blanks Performance Model Parts Inc 12233 South 1565 East Draper UT 84020 G Dye Pis ton MachiningPrecision Metal & Grind ing RD #2 Box 54-A Minesite Rd Allen town PA 18103 L Baer Chrome Plat ing Honing OPS Engine PartsP&G Metal Shop 301 North Yale Dr Garland TX 75047 G Hempel During 1983 contest season using setup Nick Sher placed first 83 Nats 20435 mph first Dayton OH Cold Cash Speed Bash September 10-11 20816 mpha new AMA National Record hope series engine tuning tanks etc will encourage modelers compete Speed events real challenge require lots experimentation success comes mastery small skills Gene Hempel 301 N Yale Dr Garland IX 75047 CL Racing/Ballard Continued page 76 momented models first re luctance use shorter-nose models cause problem getting large enough fuel tank between engine wing leading edge As time went Veco came out profile tank series improved situation addition Veco profile tanks larger mount ing area typical rectangular wedge tanks consequently tank vibrated foamed less mounted profile fuselage 164 Model Aviation 0600 GOOD VALUE LOMES WITH 80 GRIT CLOTH SANDING BELT THE SANDING BLOCK THAT WEARS BELT TOLEDOI84 THIRTIETH ANNUAL RIO EXPOSITION TOLEDO SPORTS ARENA Reserve April 6 7 81984 attend worlds greatest radio control model show See latest greatest radio control equipment presented leading manufacturers Talk notable nc personalities have questions answered featuring worlds largest Swap Shops no dealers complete refreshment centers Saturday Night auction raffles complete nc systems accessories acres free parking %4 Weak Signals RIO Club ONE MAIN STREET TOLEDO OHIO Bring latest completely finished models display enter competition ex citing awards Competition models will accept during show hours till 10 am Sunday morning no entry fee Complete radio control systems will awarded first second third place winners brand new Microwave Oven will presented lucky winner Best Show Come join us enjoy selves unquestionably worlds greatest radio control model show Open public three great days PO Box 5772 N APRIL 6 7&8 FRIDAY9amto6pm SATURDAY 9amto6pm SUNDAY9amto43Opm Toledo Ohio 43613 vibration-sensitive racing air craft Scale Race planes highpowered 15 engines used today cause enormous vibration ground rpm 22000-27000 range certainly easy vibration consequently airspeed loss generated help eliminate problem have using -in-thick profile fuselages consequently 1/2 -in hard maple engine mounts Care wood selection fuse lage also important After using plywood doublers have found use extremely stiff applecheek fairing opposite side engine run ning down underneath top wing section certainly reduces vi bration am enclosing photograph show ing applecheek design minimize engine vibration subsequent loss airspeed use two-component epoxy glue entire front section racer cover glass cloth add further stiffening properties several test ing sessions have found same engine switched between otherwise identical aircraft would lose three seconds airspeed per seven laps merely because fuselage vibration Proper pitting procedures improve race times Another method improving race time have fastest possible pit stops including releasing aircraft pilot may merge traffic slack lines unfortunate tumbles aircraft due pitmans improper release imperative pitman releasing aircraft release straight mode turned toward pilot pointing toward outside circle know competitors feel important allow aircraft pointed away pilot Unfortunately let go pilot starts pull lines model has tendency whipped back toward pilot cases lines have tendency go slack catch grass cause chipped propeller torque roll toward center pilots circle have enclosed photo graph showing pitman aligning model released perpendicular pilot pointed out competitors have problems starting racing aircraft either initial start during pit stops Assuming engine has proper compression right amount fuel good glow plug battery other factors control one-flip starts aircraft small landing gear somewhat short cases better raise aircraft off surface pitman can get good swing propeller am enclos ing photograph showing pitman hold ing aircraft up can flip prop backward enough substantial force restart engine Slow Rat Sport Race areas recent years have found very ben eficial incorporate slightly longer onewheel gear assembly allow pitman SILICO no NEgaSO ne 10 foot coils TUBING ID 062 092 125 us POST $/coiI 235 265 325 54l/COIL LARRY DODGE AERO INC 10210 MANNINGSTILLWATER MN 55082 Apil1984 165 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Safe Flying No Accident PAW DIESELS Englands Finest 049 35 New low low prices Send $100 list Eric Clutton Rt 4 Box 1109C Edmond OK 73034 -SCALE DOCUMENTATION/ SCALE DRAWINGSMODEL PLANS HOTOS BOOtS TECH 1984 AIRPLANERN ON CATA LOG48500 MC KENZIE HWY $300VIDA OREGON 97488 enough clearance properly strike pro peller am enclosing two photographs showing different methods starting method flip engine forward having compression set pro peller blade two oclock position slapping propeller extremely hard engine starts flip Another method flip engine backwards strik ing propeller very close hub propeller must set horizontal parallel ground method produce satis factory results Certainly pilot must job bringing plane substantial speed getting out pits back air shortest possible interval time certainly cannot emphasize impor tance thorough complete practicing improve overall race times Know racing-circle markings Finally find competitors mark off standard circle AMA specifications use practice cases flying school parking lots etc impera tive use either chalk spray paint owner will allow mark off proper center circle landing circle pitting area Practicing under standard circle conditions improves relationship between pilot pitman since landings takeoffs done same circle atmosphere will used under competitive situa tions NEW Tartan Twin Muffler Set Allows adjustment carb running $3995 400 RPM increase over stock As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Electrics/Kopski Continued aoe 82 weight saving quarter ouncing because wings dont fold tips Two additional balsa spars used top bottom about halfway between main spars trailing edge latter spars can partial span so-called stub spars Like main spar pair stub spars also webbed part length Usually bottom spar stub pair continued full span supporting ribs use stub spar seems like obvious extension now-common main I-beam some reason commonly used departure established prac tice light easy adds great deal strength high aspect ratio wings stub spars may bit unusual big difference comes now four spars get spruce doublers staggered length beginning root extending outward along main panels stopping dif ferent rib stations minimizes amount comparatively heavy material putting its strength will gooddistributed step-wise center outward Most Sailplane wings sim 3-FUNCTION ACCUETACH ITM Lb LCD Tachometer w/dual scale capability lOX bOX @ Digital Voltmeter load /5 && checking/cycling TX/RX battery combos ACCU-TACHI torquick charging operation w~9 7 9aitt Send check Noror money order Ca t add 600 tax PO Box 70956 AVIONRSS Sunnyvale CA INC94086 ply use spruce way sparstrue indiscretion true overkill inverted quarter ouncing Lets describe example Its Spec tra Soar wing 8-in chord 67-in span rectangular planform poly dihedral main panels 20 long tip panels 13 ribs spaced 21/2 relatively light Ak balsa four hard balsa spars Vt X /4 main pair goes full span although balsa used tip panel spars also rela tively light stub spar structure 121/2 long five ribs main spar webbing covers four ribs stub spar webbing three spruce spar doublers square glued alongside balsa spars bottom main spar doubler five ribs long top four ribs long bottom stub spar doubler three ribs long top two ribs long particular example spruce doubler spars located TE side balsa spars full-depth Vik ply wood dihedral barces 2-in length glued spruce pieces form super strong center dihedral joint short dihedral brace also used behind balsa leading edge wing center planked over rib bay panel iA6 balsa top bottom done before dihedral joint made allowing mating surfaces snded flat tight fit maximum spar planking end-grain contact produce truly strong dihedral Continued page 168 Fine Quality Flying Models ~_5~ V Catalog $150 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 444e 44 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 166 Model Aviation PK PRODUCTS Specializing Quadra/Zenoah Sales Service PO Box 6226 Hayward CA 94544 Tel 415 5B1-4277 Eves H & K Superstarters Q-35$2995 Q-50$2995 MAG II$3495 Super Hustler$3495 Zenoah$2995 Tartan Twin$3995 DEALER INQUIRIES IN V/TED ALL ORDERS ADD $150 POSTAGE & HANDLING CALIF RES ADD SALES TAX TV GLOW lire cdl PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson Associates PO Box 151E~ Since 7948 Wayne NJ 07470 Perma-Grit Litetime * Carbide Sanding Tools Tungsten Carbide grit est material next diamond Tungsten carsido grit brazed steel 9 long tool use no balsa hardwooOs bborglass beaded foamo epooc fliers pleoiglasAcerago Meeters Use excellent tools modeler can use Don Dowe Professional Engineer Made USAr-tOO i1a2r C,riIri,$051 i-br Fin$655 Ask hour Dealer send cheekF-IllFiat C,$051 o MO No COOsI soC-Ill Fdiur Ca,eIFi,$055 otot irtOtS DG Productso-2eaoorco,JF,5625 209 carriands Driveella rCun/Fitnns Dayton OH 45429 r-n,ed-CoelFrnesass 15131 294-1192 residents oddt%tao
Edition: Model Aviation - 1984/04
Page Numbers: 76, 164, 165, 166
Control Line RA CING John Ballard IMPROVEMENT airspeed subject month have several letters con cerning apparent inability racing com petitors get airspeeds up corn petitive level Subsequent correspondence has indicated engine horsepower propeller combinations creating proper thrust achieve competitive yelocities Whats holding back major hindrance airspeed engine vi bration dont see much Rat Racing event since believe com petitors using Harters magnesium pan virtually eliminates powerrobbing engine vibrations Unfortunately profile-style racers such Slow Rat Scale Racing Sport Rac ing Big Goodyear etc have engine mounted wooden fuselage whichat besthas aluminum magnesium mounting plate reduce vibration can recall years ago before Slow Rat came professional Sport Race enthusi asts using Sterling kits such Mustang Yak-9 Ringmaster Veco Tomahawk PDQ Circus Clown found though airplanes significant resemblance other Tomahawk Ringmaster seemed have better airspeed other kits racing applications found length fuselage front wing section front engine shortest kits two After much experimentation found extending motor mount another three four inches fuselage ad ditional airspeed could realized same engine moved plane plane difference being shorter nose moment beefed-up enginemounting area included replacing A6-in 2-ply Vt-in plywood doublers five-ply 3¼2-in plywood modifications incorporated other kits airspeeds increased alsobut dramatically shorter-noseContinued page 164 Above LI see anotner prop-nipping technique horizontal smash Slow Rat has prop toiward 12 oclockl hipping posi tion pitman has hand well back get lot force behind flip one-try starting right see really solid applecheek cowl Scale Racerit helps reduce engine vibration profile fuselage Below L pitman Dan Cranfill careful release Texas Slow Rat plane exactly perpendicularnot pointed outto pilot will save much grief pilot right see off-compression backward prop-flip force applied smartly near prop hub engine bounces off compression hope one-flip start Note strange design model Look closelyits Sport Scale atomic missile-carrying submarine forward fin subs sailand ha little nericoDes too 76 Model Aviation Pitman Frank Williams has lifted Racer off ground can get enough force behind prop-flip start engine first try Right hand gloved safety Hi Im ART GROSS know some have wondering WHAT IN HELL IS WEDGE LOCK Well will tell hand sanding block made out HIGH IMPACT STYREMEIF IT EVER BREAKS WE WILL REPLACE IT FREE uses belts same size 3x18 Electric Hand Sanders might ask WHY use expensive belts instead using cheaper sandpaper block sanding WHY BECAUSE BELTS ARE MORE DEPENDABLE ECONOMICAL DURABLE AND EASIER TO USE glueing tacking clamping pieces sandpaper other block BELT WILL NOT SLIP WRINKLE OR TEAR CAUSING THE MARKING AND GOUGING OF YOUR FINISHED WORK 1-RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 sheets regular sandpaper sandpaper sanding block can waste up 440/0 its sandpaper just fasten itself block BELTS ARE EASILY CHANGED THEY ARE PUT ON AND TAKEN OFF BLOCK WITHOUT DAMAGE SO THEY ARE REUSABLE FOR MANY JOBS SINCE THE BELT IS SO EASILY CHANGED IN SECONDS YOU PICK THE RIGHT BELT TYPE & GRIT SIZE TO MAKE YOUR SANDING JOB EASIER WE THINK THE WEDGE LOCK SANDING BLOCK IS THE BEST YOU CAN BUY BUT WE ALSO KNOW SINCE YOU HAVE NOT USED ONE YOU MIGHT NOT AGREE WE WILL PUT OUR MONEY WHERE OUR MOUTH IS GET ONE AND USE IT AND THEN IF YOU DO NOT AGREE WITH US AND WANT YOUR MONEY BACK WE WILL BE HAPPY TO GIVE IT BACK TO YOU MODELERS ASK YOUR HOBBY SHOP FOR WEDGE LOCK HOBBY SHOP DEALERS ASK YOUR DISTRIBUTORS FOR IT DISTR ART GROSS ENTERPRISES 206 743-9332 $1000 COUPON SPECIAL $1000 Please fill out coupon mailing label circle 3 extra RESIN BONDED BELTS want will send prepaid 1-WEDGE LOCK SANDING BLOCK comes 80 grit cloth belt & 3 RESIN BONDED REPLACEMENT BELTS THIS IS $1400 value $1000 BLOCK -$600 s @ 0200 -- postageS haedlirsg $1400 $1000 COUPON SPECIAL $1000 BELTS ALUMINUM OXIDE 80-100-1 20-1 50-1 80-220 SILCON CARBIDE 220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 touch-and-go taxi engine shutoff bomb tank drop flaps Flight QualificationsModel must come airborne within three minutes start prop flipping Three attempts will given make two official flights An ad ditional minute starting time will allowed additional engine bonus 10 points will given getting air borne minute single-engine mod els within two minutes twin-engine models additional minute allowed additional engine multi-engine models will receive extra 10 points engines remain running through 10 qual ifying laps Maximum score can achieved static flight would 250 Flying Line Safety Requirements same listed AMA rule book scale models weighing up 8 lb George Bill go say reason came up own set rules profile event twofold GSCBs multi-interest CL club heavy terest Stunt sport flying Scale Carrier run close second Scale mod elers club thought type event would make good starting point modelers interested Scale and/or Stunt hesitant construct full-bodied model time As can see GSCB rules thing quite simple point Items such I-in-thick-maximum fuselage up 10 flying options would satisfy sport competitive fliers regardless primary CL interest bonus multi-engine fanatic will also note static judging distance 10 ft felt greater viewing distance would less effective judg ing standpoint because general size available profile models speaking availability pro file models small list readily available several manufac turers MidwestP -40 erschmitt Aira cobra SterlingYAK-9 P-38 P-5l GoldbergP-40 Buster Cosmic Wind Shoestring cant find model build among available might time try efforts designing building own Profile George Bill conclude thoughts Profile Scale hope GSCB event will interest other clubs will some small way help promote Scale activity 1984 event held first time GSCBs annual Teterboro NJ Scale Model Flying Show last September 1983 See accompanying photos some models entered new event Now building season winter months has underway some time parts country Scale builders should have new supply ideas tips perhaps some photos new proj ects would great would share fellow CL Scale modelers Send items Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Speed/Hempel Continued paqe 75 needle adjustments b-turn increments important single thing pilot will need master capability finetune engine flight very simple model flying level approximately three four ft altitude engine run ning slightly rich maneuver model up about 15 ft will cause engine lean out After about 11/2 2 laps bring model back down level flight en gine tends go rich again turn needle shut /o-turn before next flight Repeat procedure until engine holds con stant setting level flight Closing comments No sets speed mark solely himself requires tal ents assistance people am fortunate have endowed friendship expertise such people Frank Garzon Les Baer Gene Hempel fabulous pilot George Brown others have helped make happen Service materials Piston Blanks Performance Model Parts Inc 12233 South 1565 East Draper UT 84020 G Dye Pis ton MachiningPrecision Metal & Grind ing RD #2 Box 54-A Minesite Rd Allen town PA 18103 L Baer Chrome Plat ing Honing OPS Engine PartsP&G Metal Shop 301 North Yale Dr Garland TX 75047 G Hempel During 1983 contest season using setup Nick Sher placed first 83 Nats 20435 mph first Dayton OH Cold Cash Speed Bash September 10-11 20816 mpha new AMA National Record hope series engine tuning tanks etc will encourage modelers compete Speed events real challenge require lots experimentation success comes mastery small skills Gene Hempel 301 N Yale Dr Garland IX 75047 CL Racing/Ballard Continued page 76 momented models first re luctance use shorter-nose models cause problem getting large enough fuel tank between engine wing leading edge As time went Veco came out profile tank series improved situation addition Veco profile tanks larger mount ing area typical rectangular wedge tanks consequently tank vibrated foamed less mounted profile fuselage 164 Model Aviation 0600 GOOD VALUE LOMES WITH 80 GRIT CLOTH SANDING BELT THE SANDING BLOCK THAT WEARS BELT TOLEDOI84 THIRTIETH ANNUAL RIO EXPOSITION TOLEDO SPORTS ARENA Reserve April 6 7 81984 attend worlds greatest radio control model show See latest greatest radio control equipment presented leading manufacturers Talk notable nc personalities have questions answered featuring worlds largest Swap Shops no dealers complete refreshment centers Saturday Night auction raffles complete nc systems accessories acres free parking %4 Weak Signals RIO Club ONE MAIN STREET TOLEDO OHIO Bring latest completely finished models display enter competition ex citing awards Competition models will accept during show hours till 10 am Sunday morning no entry fee Complete radio control systems will awarded first second third place winners brand new Microwave Oven will presented lucky winner Best Show Come join us enjoy selves unquestionably worlds greatest radio control model show Open public three great days PO Box 5772 N APRIL 6 7&8 FRIDAY9amto6pm SATURDAY 9amto6pm SUNDAY9amto43Opm Toledo Ohio 43613 vibration-sensitive racing air craft Scale Race planes highpowered 15 engines used today cause enormous vibration ground rpm 22000-27000 range certainly easy vibration consequently airspeed loss generated help eliminate problem have using -in-thick profile fuselages consequently 1/2 -in hard maple engine mounts Care wood selection fuse lage also important After using plywood doublers have found use extremely stiff applecheek fairing opposite side engine run ning down underneath top wing section certainly reduces vi bration am enclosing photograph show ing applecheek design minimize engine vibration subsequent loss airspeed use two-component epoxy glue entire front section racer cover glass cloth add further stiffening properties several test ing sessions have found same engine switched between otherwise identical aircraft would lose three seconds airspeed per seven laps merely because fuselage vibration Proper pitting procedures improve race times Another method improving race time have fastest possible pit stops including releasing aircraft pilot may merge traffic slack lines unfortunate tumbles aircraft due pitmans improper release imperative pitman releasing aircraft release straight mode turned toward pilot pointing toward outside circle know competitors feel important allow aircraft pointed away pilot Unfortunately let go pilot starts pull lines model has tendency whipped back toward pilot cases lines have tendency go slack catch grass cause chipped propeller torque roll toward center pilots circle have enclosed photo graph showing pitman aligning model released perpendicular pilot pointed out competitors have problems starting racing aircraft either initial start during pit stops Assuming engine has proper compression right amount fuel good glow plug battery other factors control one-flip starts aircraft small landing gear somewhat short cases better raise aircraft off surface pitman can get good swing propeller am enclos ing photograph showing pitman hold ing aircraft up can flip prop backward enough substantial force restart engine Slow Rat Sport Race areas recent years have found very ben eficial incorporate slightly longer onewheel gear assembly allow pitman SILICO no NEgaSO ne 10 foot coils TUBING ID 062 092 125 us POST $/coiI 235 265 325 54l/COIL LARRY DODGE AERO INC 10210 MANNINGSTILLWATER MN 55082 Apil1984 165 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Safe Flying No Accident PAW DIESELS Englands Finest 049 35 New low low prices Send $100 list Eric Clutton Rt 4 Box 1109C Edmond OK 73034 -SCALE DOCUMENTATION/ SCALE DRAWINGSMODEL PLANS HOTOS BOOtS TECH 1984 AIRPLANERN ON CATA LOG48500 MC KENZIE HWY $300VIDA OREGON 97488 enough clearance properly strike pro peller am enclosing two photographs showing different methods starting method flip engine forward having compression set pro peller blade two oclock position slapping propeller extremely hard engine starts flip Another method flip engine backwards strik ing propeller very close hub propeller must set horizontal parallel ground method produce satis factory results Certainly pilot must job bringing plane substantial speed getting out pits back air shortest possible interval time certainly cannot emphasize impor tance thorough complete practicing improve overall race times Know racing-circle markings Finally find competitors mark off standard circle AMA specifications use practice cases flying school parking lots etc impera tive use either chalk spray paint owner will allow mark off proper center circle landing circle pitting area Practicing under standard circle conditions improves relationship between pilot pitman since landings takeoffs done same circle atmosphere will used under competitive situa tions NEW Tartan Twin Muffler Set Allows adjustment carb running $3995 400 RPM increase over stock As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Electrics/Kopski Continued aoe 82 weight saving quarter ouncing because wings dont fold tips Two additional balsa spars used top bottom about halfway between main spars trailing edge latter spars can partial span so-called stub spars Like main spar pair stub spars also webbed part length Usually bottom spar stub pair continued full span supporting ribs use stub spar seems like obvious extension now-common main I-beam some reason commonly used departure established prac tice light easy adds great deal strength high aspect ratio wings stub spars may bit unusual big difference comes now four spars get spruce doublers staggered length beginning root extending outward along main panels stopping dif ferent rib stations minimizes amount comparatively heavy material putting its strength will gooddistributed step-wise center outward Most Sailplane wings sim 3-FUNCTION ACCUETACH ITM Lb LCD Tachometer w/dual scale capability lOX bOX @ Digital Voltmeter load /5 && checking/cycling TX/RX battery combos ACCU-TACHI torquick charging operation w~9 7 9aitt Send check Noror money order Ca t add 600 tax PO Box 70956 AVIONRSS Sunnyvale CA INC94086 ply use spruce way sparstrue indiscretion true overkill inverted quarter ouncing Lets describe example Its Spec tra Soar wing 8-in chord 67-in span rectangular planform poly dihedral main panels 20 long tip panels 13 ribs spaced 21/2 relatively light Ak balsa four hard balsa spars Vt X /4 main pair goes full span although balsa used tip panel spars also rela tively light stub spar structure 121/2 long five ribs main spar webbing covers four ribs stub spar webbing three spruce spar doublers square glued alongside balsa spars bottom main spar doubler five ribs long top four ribs long bottom stub spar doubler three ribs long top two ribs long particular example spruce doubler spars located TE side balsa spars full-depth Vik ply wood dihedral barces 2-in length glued spruce pieces form super strong center dihedral joint short dihedral brace also used behind balsa leading edge wing center planked over rib bay panel iA6 balsa top bottom done before dihedral joint made allowing mating surfaces snded flat tight fit maximum spar planking end-grain contact produce truly strong dihedral Continued page 168 Fine Quality Flying Models ~_5~ V Catalog $150 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 444e 44 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 166 Model Aviation PK PRODUCTS Specializing Quadra/Zenoah Sales Service PO Box 6226 Hayward CA 94544 Tel 415 5B1-4277 Eves H & K Superstarters Q-35$2995 Q-50$2995 MAG II$3495 Super Hustler$3495 Zenoah$2995 Tartan Twin$3995 DEALER INQUIRIES IN V/TED ALL ORDERS ADD $150 POSTAGE & HANDLING CALIF RES ADD SALES TAX TV GLOW lire cdl PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson Associates PO Box 151E~ Since 7948 Wayne NJ 07470 Perma-Grit Litetime * Carbide Sanding Tools Tungsten Carbide grit est material next diamond Tungsten carsido grit brazed steel 9 long tool use no balsa hardwooOs bborglass beaded foamo epooc fliers pleoiglasAcerago Meeters Use excellent tools modeler can use Don Dowe Professional Engineer Made USAr-tOO i1a2r C,riIri,$051 i-br Fin$655 Ask hour Dealer send cheekF-IllFiat C,$051 o MO No COOsI soC-Ill Fdiur Ca,eIFi,$055 otot irtOtS DG Productso-2eaoorco,JF,5625 209 carriands Driveella rCun/Fitnns Dayton OH 45429 r-n,ed-CoelFrnesass 15131 294-1192 residents oddt%tao
Edition: Model Aviation - 1984/04
Page Numbers: 76, 164, 165, 166
Control Line RA CING John Ballard IMPROVEMENT airspeed subject month have several letters con cerning apparent inability racing com petitors get airspeeds up corn petitive level Subsequent correspondence has indicated engine horsepower propeller combinations creating proper thrust achieve competitive yelocities Whats holding back major hindrance airspeed engine vi bration dont see much Rat Racing event since believe com petitors using Harters magnesium pan virtually eliminates powerrobbing engine vibrations Unfortunately profile-style racers such Slow Rat Scale Racing Sport Rac ing Big Goodyear etc have engine mounted wooden fuselage whichat besthas aluminum magnesium mounting plate reduce vibration can recall years ago before Slow Rat came professional Sport Race enthusi asts using Sterling kits such Mustang Yak-9 Ringmaster Veco Tomahawk PDQ Circus Clown found though airplanes significant resemblance other Tomahawk Ringmaster seemed have better airspeed other kits racing applications found length fuselage front wing section front engine shortest kits two After much experimentation found extending motor mount another three four inches fuselage ad ditional airspeed could realized same engine moved plane plane difference being shorter nose moment beefed-up enginemounting area included replacing A6-in 2-ply Vt-in plywood doublers five-ply 3¼2-in plywood modifications incorporated other kits airspeeds increased alsobut dramatically shorter-noseContinued page 164 Above LI see anotner prop-nipping technique horizontal smash Slow Rat has prop toiward 12 oclockl hipping posi tion pitman has hand well back get lot force behind flip one-try starting right see really solid applecheek cowl Scale Racerit helps reduce engine vibration profile fuselage Below L pitman Dan Cranfill careful release Texas Slow Rat plane exactly perpendicularnot pointed outto pilot will save much grief pilot right see off-compression backward prop-flip force applied smartly near prop hub engine bounces off compression hope one-flip start Note strange design model Look closelyits Sport Scale atomic missile-carrying submarine forward fin subs sailand ha little nericoDes too 76 Model Aviation Pitman Frank Williams has lifted Racer off ground can get enough force behind prop-flip start engine first try Right hand gloved safety Hi Im ART GROSS know some have wondering WHAT IN HELL IS WEDGE LOCK Well will tell hand sanding block made out HIGH IMPACT STYREMEIF IT EVER BREAKS WE WILL REPLACE IT FREE uses belts same size 3x18 Electric Hand Sanders might ask WHY use expensive belts instead using cheaper sandpaper block sanding WHY BECAUSE BELTS ARE MORE DEPENDABLE ECONOMICAL DURABLE AND EASIER TO USE glueing tacking clamping pieces sandpaper other block BELT WILL NOT SLIP WRINKLE OR TEAR CAUSING THE MARKING AND GOUGING OF YOUR FINISHED WORK 1-RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 sheets regular sandpaper sandpaper sanding block can waste up 440/0 its sandpaper just fasten itself block BELTS ARE EASILY CHANGED THEY ARE PUT ON AND TAKEN OFF BLOCK WITHOUT DAMAGE SO THEY ARE REUSABLE FOR MANY JOBS SINCE THE BELT IS SO EASILY CHANGED IN SECONDS YOU PICK THE RIGHT BELT TYPE & GRIT SIZE TO MAKE YOUR SANDING JOB EASIER WE THINK THE WEDGE LOCK SANDING BLOCK IS THE BEST YOU CAN BUY BUT WE ALSO KNOW SINCE YOU HAVE NOT USED ONE YOU MIGHT NOT AGREE WE WILL PUT OUR MONEY WHERE OUR MOUTH IS GET ONE AND USE IT AND THEN IF YOU DO NOT AGREE WITH US AND WANT YOUR MONEY BACK WE WILL BE HAPPY TO GIVE IT BACK TO YOU MODELERS ASK YOUR HOBBY SHOP FOR WEDGE LOCK HOBBY SHOP DEALERS ASK YOUR DISTRIBUTORS FOR IT DISTR ART GROSS ENTERPRISES 206 743-9332 $1000 COUPON SPECIAL $1000 Please fill out coupon mailing label circle 3 extra RESIN BONDED BELTS want will send prepaid 1-WEDGE LOCK SANDING BLOCK comes 80 grit cloth belt & 3 RESIN BONDED REPLACEMENT BELTS THIS IS $1400 value $1000 BLOCK -$600 s @ 0200 -- postageS haedlirsg $1400 $1000 COUPON SPECIAL $1000 BELTS ALUMINUM OXIDE 80-100-1 20-1 50-1 80-220 SILCON CARBIDE 220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 touch-and-go taxi engine shutoff bomb tank drop flaps Flight QualificationsModel must come airborne within three minutes start prop flipping Three attempts will given make two official flights An ad ditional minute starting time will allowed additional engine bonus 10 points will given getting air borne minute single-engine mod els within two minutes twin-engine models additional minute allowed additional engine multi-engine models will receive extra 10 points engines remain running through 10 qual ifying laps Maximum score can achieved static flight would 250 Flying Line Safety Requirements same listed AMA rule book scale models weighing up 8 lb George Bill go say reason came up own set rules profile event twofold GSCBs multi-interest CL club heavy terest Stunt sport flying Scale Carrier run close second Scale mod elers club thought type event would make good starting point modelers interested Scale and/or Stunt hesitant construct full-bodied model time As can see GSCB rules thing quite simple point Items such I-in-thick-maximum fuselage up 10 flying options would satisfy sport competitive fliers regardless primary CL interest bonus multi-engine fanatic will also note static judging distance 10 ft felt greater viewing distance would less effective judg ing standpoint because general size available profile models speaking availability pro file models small list readily available several manufac turers MidwestP -40 erschmitt Aira cobra SterlingYAK-9 P-38 P-5l GoldbergP-40 Buster Cosmic Wind Shoestring cant find model build among available might time try efforts designing building own Profile George Bill conclude thoughts Profile Scale hope GSCB event will interest other clubs will some small way help promote Scale activity 1984 event held first time GSCBs annual Teterboro NJ Scale Model Flying Show last September 1983 See accompanying photos some models entered new event Now building season winter months has underway some time parts country Scale builders should have new supply ideas tips perhaps some photos new proj ects would great would share fellow CL Scale modelers Send items Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Speed/Hempel Continued paqe 75 needle adjustments b-turn increments important single thing pilot will need master capability finetune engine flight very simple model flying level approximately three four ft altitude engine run ning slightly rich maneuver model up about 15 ft will cause engine lean out After about 11/2 2 laps bring model back down level flight en gine tends go rich again turn needle shut /o-turn before next flight Repeat procedure until engine holds con stant setting level flight Closing comments No sets speed mark solely himself requires tal ents assistance people am fortunate have endowed friendship expertise such people Frank Garzon Les Baer Gene Hempel fabulous pilot George Brown others have helped make happen Service materials Piston Blanks Performance Model Parts Inc 12233 South 1565 East Draper UT 84020 G Dye Pis ton MachiningPrecision Metal & Grind ing RD #2 Box 54-A Minesite Rd Allen town PA 18103 L Baer Chrome Plat ing Honing OPS Engine PartsP&G Metal Shop 301 North Yale Dr Garland TX 75047 G Hempel During 1983 contest season using setup Nick Sher placed first 83 Nats 20435 mph first Dayton OH Cold Cash Speed Bash September 10-11 20816 mpha new AMA National Record hope series engine tuning tanks etc will encourage modelers compete Speed events real challenge require lots experimentation success comes mastery small skills Gene Hempel 301 N Yale Dr Garland IX 75047 CL Racing/Ballard Continued page 76 momented models first re luctance use shorter-nose models cause problem getting large enough fuel tank between engine wing leading edge As time went Veco came out profile tank series improved situation addition Veco profile tanks larger mount ing area typical rectangular wedge tanks consequently tank vibrated foamed less mounted profile fuselage 164 Model Aviation 0600 GOOD VALUE LOMES WITH 80 GRIT CLOTH SANDING BELT THE SANDING BLOCK THAT WEARS BELT TOLEDOI84 THIRTIETH ANNUAL RIO EXPOSITION TOLEDO SPORTS ARENA Reserve April 6 7 81984 attend worlds greatest radio control model show See latest greatest radio control equipment presented leading manufacturers Talk notable nc personalities have questions answered featuring worlds largest Swap Shops no dealers complete refreshment centers Saturday Night auction raffles complete nc systems accessories acres free parking %4 Weak Signals RIO Club ONE MAIN STREET TOLEDO OHIO Bring latest completely finished models display enter competition ex citing awards Competition models will accept during show hours till 10 am Sunday morning no entry fee Complete radio control systems will awarded first second third place winners brand new Microwave Oven will presented lucky winner Best Show Come join us enjoy selves unquestionably worlds greatest radio control model show Open public three great days PO Box 5772 N APRIL 6 7&8 FRIDAY9amto6pm SATURDAY 9amto6pm SUNDAY9amto43Opm Toledo Ohio 43613 vibration-sensitive racing air craft Scale Race planes highpowered 15 engines used today cause enormous vibration ground rpm 22000-27000 range certainly easy vibration consequently airspeed loss generated help eliminate problem have using -in-thick profile fuselages consequently 1/2 -in hard maple engine mounts Care wood selection fuse lage also important After using plywood doublers have found use extremely stiff applecheek fairing opposite side engine run ning down underneath top wing section certainly reduces vi bration am enclosing photograph show ing applecheek design minimize engine vibration subsequent loss airspeed use two-component epoxy glue entire front section racer cover glass cloth add further stiffening properties several test ing sessions have found same engine switched between otherwise identical aircraft would lose three seconds airspeed per seven laps merely because fuselage vibration Proper pitting procedures improve race times Another method improving race time have fastest possible pit stops including releasing aircraft pilot may merge traffic slack lines unfortunate tumbles aircraft due pitmans improper release imperative pitman releasing aircraft release straight mode turned toward pilot pointing toward outside circle know competitors feel important allow aircraft pointed away pilot Unfortunately let go pilot starts pull lines model has tendency whipped back toward pilot cases lines have tendency go slack catch grass cause chipped propeller torque roll toward center pilots circle have enclosed photo graph showing pitman aligning model released perpendicular pilot pointed out competitors have problems starting racing aircraft either initial start during pit stops Assuming engine has proper compression right amount fuel good glow plug battery other factors control one-flip starts aircraft small landing gear somewhat short cases better raise aircraft off surface pitman can get good swing propeller am enclos ing photograph showing pitman hold ing aircraft up can flip prop backward enough substantial force restart engine Slow Rat Sport Race areas recent years have found very ben eficial incorporate slightly longer onewheel gear assembly allow pitman SILICO no NEgaSO ne 10 foot coils TUBING ID 062 092 125 us POST $/coiI 235 265 325 54l/COIL LARRY DODGE AERO INC 10210 MANNINGSTILLWATER MN 55082 Apil1984 165 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Safe Flying No Accident PAW DIESELS Englands Finest 049 35 New low low prices Send $100 list Eric Clutton Rt 4 Box 1109C Edmond OK 73034 -SCALE DOCUMENTATION/ SCALE DRAWINGSMODEL PLANS HOTOS BOOtS TECH 1984 AIRPLANERN ON CATA LOG48500 MC KENZIE HWY $300VIDA OREGON 97488 enough clearance properly strike pro peller am enclosing two photographs showing different methods starting method flip engine forward having compression set pro peller blade two oclock position slapping propeller extremely hard engine starts flip Another method flip engine backwards strik ing propeller very close hub propeller must set horizontal parallel ground method produce satis factory results Certainly pilot must job bringing plane substantial speed getting out pits back air shortest possible interval time certainly cannot emphasize impor tance thorough complete practicing improve overall race times Know racing-circle markings Finally find competitors mark off standard circle AMA specifications use practice cases flying school parking lots etc impera tive use either chalk spray paint owner will allow mark off proper center circle landing circle pitting area Practicing under standard circle conditions improves relationship between pilot pitman since landings takeoffs done same circle atmosphere will used under competitive situa tions NEW Tartan Twin Muffler Set Allows adjustment carb running $3995 400 RPM increase over stock As always comments solicited appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 Electrics/Kopski Continued aoe 82 weight saving quarter ouncing because wings dont fold tips Two additional balsa spars used top bottom about halfway between main spars trailing edge latter spars can partial span so-called stub spars Like main spar pair stub spars also webbed part length Usually bottom spar stub pair continued full span supporting ribs use stub spar seems like obvious extension now-common main I-beam some reason commonly used departure established prac tice light easy adds great deal strength high aspect ratio wings stub spars may bit unusual big difference comes now four spars get spruce doublers staggered length beginning root extending outward along main panels stopping dif ferent rib stations minimizes amount comparatively heavy material putting its strength will gooddistributed step-wise center outward Most Sailplane wings sim 3-FUNCTION ACCUETACH ITM Lb LCD Tachometer w/dual scale capability lOX bOX @ Digital Voltmeter load /5 && checking/cycling TX/RX battery combos ACCU-TACHI torquick charging operation w~9 7 9aitt Send check Noror money order Ca t add 600 tax PO Box 70956 AVIONRSS Sunnyvale CA INC94086 ply use spruce way sparstrue indiscretion true overkill inverted quarter ouncing Lets describe example Its Spec tra Soar wing 8-in chord 67-in span rectangular planform poly dihedral main panels 20 long tip panels 13 ribs spaced 21/2 relatively light Ak balsa four hard balsa spars Vt X /4 main pair goes full span although balsa used tip panel spars also rela tively light stub spar structure 121/2 long five ribs main spar webbing covers four ribs stub spar webbing three spruce spar doublers square glued alongside balsa spars bottom main spar doubler five ribs long top four ribs long bottom stub spar doubler three ribs long top two ribs long particular example spruce doubler spars located TE side balsa spars full-depth Vik ply wood dihedral barces 2-in length glued spruce pieces form super strong center dihedral joint short dihedral brace also used behind balsa leading edge wing center planked over rib bay panel iA6 balsa top bottom done before dihedral joint made allowing mating surfaces snded flat tight fit maximum spar planking end-grain contact produce truly strong dihedral Continued page 168 Fine Quality Flying Models ~_5~ V Catalog $150 98 RUBBER POWER KITS plus Gliders CIL RIC Accessories Books 444e 44 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 166 Model Aviation PK PRODUCTS Specializing Quadra/Zenoah Sales Service PO Box 6226 Hayward CA 94544 Tel 415 5B1-4277 Eves H & K Superstarters Q-35$2995 Q-50$2995 MAG II$3495 Super Hustler$3495 Zenoah$2995 Tartan Twin$3995 DEALER INQUIRIES IN V/TED ALL ORDERS ADD $150 POSTAGE & HANDLING CALIF RES ADD SALES TAX TV GLOW lire cdl PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson Associates PO Box 151E~ Since 7948 Wayne NJ 07470 Perma-Grit Litetime * Carbide Sanding Tools Tungsten Carbide grit est material next diamond Tungsten carsido grit brazed steel 9 long tool use no balsa hardwooOs bborglass beaded foamo epooc fliers pleoiglasAcerago Meeters Use excellent tools modeler can use Don Dowe Professional Engineer Made USAr-tOO i1a2r C,riIri,$051 i-br Fin$655 Ask hour Dealer send cheekF-IllFiat C,$051 o MO No COOsI soC-Ill Fdiur Ca,eIFi,$055 otot irtOtS DG Productso-2eaoorco,JF,5625 209 carriands Driveella rCun/Fitnns Dayton OH 45429 r-n,ed-CoelFrnesass 15131 294-1192 residents oddt%tao
