Ive behaved well enough join great Valhalla Well shes gonna blow nows time becauseOl Muddy down sure big enough quench it And forget Val stuffIm trip intended pure fun sure turned out closest thing work built 32-in span Delta speed model put elec trostatic wing leveler During past five years weve used electrostatic autopilots about 50 different models RPVs flew speeds 100 miles hour less really curious see could make work 200maybe 250 fun parts Houston Club made up some finest people Ive ever met Hard work flying field doesnt bother 16 timers least ten other offi cials duty sitting boonies pushing buttons writing numbers shout ing encouragement hours end no complaints though April 1977 23 Lars Gierts son crank up OPS Charlie Danley gets set go Model uses dolly takeoff Really gets up goestakes dolly along up 4 5 feet before restrainer cord stops Although model small has tremendous lifting power OPS going Boys pass es 228 210 unfortunately flight territory occupied native troops rattlesnakes stable planes George took two conventional speed models wing tail new Delta fitted OPS 60s tuned pipes carburetors worked right made 9-dia 13-in pitch prop go 22000 rpm have idea badly 60 going speed can shake 4-pound airplane Ill tell words George used Hey thing going electrocute really does shake badly feels like youre getting electric shock Dont get impression Im knocking OPS shaker report this bragging hear guys claim have smooth running 60s just much noise just no way counter weight crank can go sideways piston con-rod go up down 22000 times minute shaking liver ing smell out 45 pounds balsa fiberglass inside shaker airplane hoard experience accumulated over six years speed flying during crashed two airplanes year average Thats hard way learn teaches good lessons instance just dont mount servos grommets screws Theyll last about ten minutes way Actually cut grommet lugs off servo cases three servos taped gether single glob packed form-fitting box soft foam sides Yes does make ailerons cou ple up elevator because load surface pushes other servo new place speed flying name game fly straight 300 meters Theres no judge care whether youre doing precision loops other gorgeously perfect stunts So fix surfaces theres no load servos fly straight learn put little right aileron pull up elevator little sacrifice can have servos survive 100 flightsas theyve done airplanes George flying put keepers switches wont vibrate off position counterbalance control surfaces pre vent flutter dont use thin metal tanks because fuel vibrates bangs around inside tank makes fatigue cracks leaks just messy no-no youve got five ounces fuel engine uses three ounces minute full bore Tape connectors receiver battery packs means put keepers control-horn devises thing really dont have worry too much about whether propeller perfectly balanced facts takes really badly balanced prop like maybe piece blade missing come close adding significant vibra tion what can produced piston 24 ModelAviation Houston High Speed Air Force Ito R George Pickrell Maynard Hill Lars Giertz Charlie Denley Charlie has eyes like eagle flies Lars plane front Maynards pair 42in span jobs 32-in delta powered OPS engine Below high-speed squad ronanother view ships photographs above Business end Lars model isa masterpiece clean design No air inlet cowlingengine cooled massive amounts fuel going through engine Mini pipe use during trials tuned pipe will installed future con-rod sort balanced crank shaft Sanding propellers gnats tooth balance waste time Sanding within gnats tooth right pitch different story Getting both blades same correct pitch makes airplanes go faster think flying speed models exciting things can life George have settled rou tine two mouths four eyes intensely strained use airplane taken up about 1500 feet out over end 1000-foot course Its speck sky going 90 miles hour minimum throttle isnt ex actly tickover reason know what control stick saw well enough few seconds ago imag ine would go didnt give dumb controls roll over split S Momentarily totally out sight skinny tail-on aspect passes sec ond later can make out wing speck airplane headed straight down Now Jam throttle forward Let scream straight down second two seconds Zow-eep comes pipe Three seconds ooh wow four Start pulling up level up trap entry 40 feet altitude Zeeewoouw goes past Quick again Pull up end trap chop throttle let coast coasts about 1100-1200 feet low throttle theres speck watch George Im going roll split S again Gone out sight Theres wing again Pour coal second two three Zow-eep four pull up Zeewoouw goes again Fifteen seconds later its again Another 15 again Dont get mixed up Thats way goes Youre very busy about two minutes point run out fuel swoop fast glide swing wide turn come long long flat glide belly landing try get shakes under control figure out what can improved next flight rained first day trials windy during second George managed log 11 flights no fatalities airplanes nearby human beings Reports got 205 mph best legitimate speed average speeds upwind downwind clocks agreeing within two hundredths second Frankly think thats faster radio model has flown FAI World Record attempt think though accepted official rec ord stands 213 mph record set back clocks agree two tenths second favorable legal errors timing system used Soviet modelers could easily produce measurements about 30 40 mph above what model actually flew irony Im partly blame FAIs change 02 02 seconds Art Arro put myth bed Hous ton Formula pylon racer flew flew flew achieved top speed 150 mph get 150 mph 217 mph needed take record would need three times power K&B 40 putting out probably getting close two horsepower Leastwise sounded like using 75%nitro no muffler sure sounded like airplane honking out something fierce sounds deceiving would need six horsepower break record pylon racer Sorry Cliff Weirick just lost argument five years ago no way six horsepower will come out 40 60 matter no way Formula pylon racer will beat existing world speed record exceed record youll need small absolutely clean airplane super honking 60 engine nitro out kazoo tuned pipe need gravity help plus absolute precision putting traps just right get last pos sible benefit overspeed dive Thats illegal guys Aus trians set glider record way secrets also have flywheel engine spins up overspeed during dive stuff does seem possible reach 220 mph conCon tinued page 84 April 1977 25 1972 Gus Geissinger left Vein Smith got clean Supertigre 60 model honest 194 mph measured Dahlgren Model substantially cleaner smaller used Soviets claim 213-mph record Russian model wings rubberbanded fuselage number dirty openings cowl area Vein top engine men country thing made clear Houston Trials speed record can brokenand should during 1977 trials held Maynards Georges engines turned 91/2 x 13 propel lers 22000rpm Planes weighed about 4-1/2 pounds required unique practices youd never dream fast Formula racers Lars Giertz applies know-how prayerful position pilot Charlie Danley cooling nervesa really top-rate skilled competitive team will heard two Plane taken up 1500 feet 90-mph minimum throttle rolled over split-S opened wide dived 40-ft-high pull-up barrel through traps fiLttU&I*i PRODUCTS INC 535 DAVISYILLE ROAD OW GROVE PA 19090 658-3900 call CRAP TRAP* does exactlywhat think Crap Trap name purloined model builder Toledo Finally filter keep modern engines truly clean Call itan IMPURITIES FILTRATION SYSTEM want. call Crap Trap Newer sophisticated carburetors pumps very sensitive fine par ticles can get through filters Crap Trap Heres DOUBLE FILTRATIONIncludes two separate filters 100 mesh 007 openIng 120 mesh 004 opening Patent Applied MORE FILTER AREABoth filters cup-shaped greatly increase filter capacity COLOR CODEDFuel must go through larger silver mesh first filter out larger particles through smaller bronze mesh must WATCH IT WORKFilters encased see-through tubing CAN TAKE THE HEATThe extruded Teflon casing can handle temperatures up soo0 F 1 Between Tank 2 Between Fuel con3 Between Muffler Tank No need re move tubing muffler see tank Youve got try great new filter believe Watch action enjoy model its cleaner smoother-running engine note rpm its ballpark fly see works too low cut span put washout reduce pitch tip Use Fig 2 method get wash out outer span prop flutters give worst enemy start over funny noise rpm lower expected equals flutter will plane go slower stand chance having come apart running C Recomniendations Until someone comes up opti mum prop find major break through will trying following props 1 7-SN Rev-Up Thin TE little cleanup Cut span little necessary may best prop running muffler prop am currently using unmodified 2 7-SN Top Flite has little pitch 1 Clean up form good air foil bad airfoil out box rpm still low trim span slightly 3 7-6N Rev-Up has higher pitch 2 Thin clean up cut span may washout tips get rpm up RPM low out box 4 7-5 Rev-Up has blade area will allow bigger pitch changes anyone learns take advantage Ditto 7-5W Top Flite Dave Lane 4477 136th Hawthorne CA 90250 poductreviewproduetreeieWPVOdUCtrCViCWPrOdUCtrCViW Electric Twin Up now twin-engined electric powered RC scale model has seen kit form combination Model Flite England Polks International offer ing Britten/Norman Islander Powered two Model Flite Hummingbird motors pre wired installation spans 50 ins flying weight 3/a lbs nicad cassette pack 96V allows 8- 10-mm flights 30-mm recharge time Kit includes pre covered foam wings aileron cable stalled vacu-formed nacelles hardware pre cut prefab parts Props Cox6/3 spinners Prices Islander kit $6995 twin motor nicad pack $15995 charging monitor $3995 Polks Model-Craft Hobbies Inc 314 Fifth Ave New York NY 10001 producteiewproduetreviCwPtOdUetrCviWPrOdUCtrGVIeW F writing advertisers mention read about MA Goes/Hill Continued page 25 ventional airplane passes down wind upwind 228 210which would have record hap pened same flight So can done Lars Giertz possible improved tracks Houston smaller airplane what George flying good OPS Because lower total drag could did use 9 diameter propeller lets engine rev up bit 22000 get alls well Unfortu nately Lars aileron flutter prob lem early trials suffered dam age during launch No officials times recorded looked very fast must remember smaller air plane faster appears going Lars no throttle airplane arrangement will take really good pilot avoid having such smaller air plane disappear wild blue yonder out control Secing airplane biggest problems setting speed record Art Arros speed model looked good went over hill first flight due getting out controllable sight range Actually didnt have real chance because powered 40 too large Delta planform airplanes have lower 84 Model Aviation drag given wing area have better potential setting speed rec ord deltas though seeing still bigger problem electrostatic wing leveler put new bird mostly help problem air plane will stay upright pilot takes hands off controls device saved Delta several times during trials time went through sun George shouting Where about 5 seconds fore found would have ground time auto pilot As just kinda got far awaygoing like Concorde Wrong Way Corrigan controls aban doned Delta after three flights trial because some control surface problems looked too big fix time available Maybe next time follow-on article some tech nical stuff about drag horsepower gravity propellers flywheels speed flying will discussed now remaining avail able space must absolutely devoted saying thanks Johnson Space Cen ter Club providing funnest times hobbying Ive ever life George Pickrell feels same superbly organized affair Plenty good workers stuck job lots friendly help always available golly some marvelous senses humor down corner Texas Owen Morris Bert Streigler served Contest Directors John Kiker hosted us super tour im pressive facilities JSC JSC Club members pitched George Pickrell say thank truly wonderful experience full fun glad hard work made possible Howard Bittner set Helicopter speed record also wish could have erased Soviet speed number Please again some time Well pitch thats sure CL Scale/Stott Continued page 26 has past years judges should no longer giving maximum points just because did maneuver flying option now instructed judge performance flight realism quality performance read both articles regard ing scale modeling can understand some discouraged scale takes lot patience determination ability just building flying also become good scale builder Scale easiest areas modeling highly rewarding have correction ALA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS PUCUD Industrle8 Inc 7080 HOLLYWOOD BLVD. LOS ANGELES CA 90028 RUBBER POWERED FLYING MODELS NEW Kits 28INSPAN GIPSY MOiNDee Nit 2 13 IN SPAN P NUT KIT $349 J4 neeVite 1 13 IN SPAN P-NUTKIT $34916 IN SPAN SPORT $349 PEANUT SCALE KITS PIETENPOL$329 MILES$329 TURBULENT$329 PIPER i3 CUB$329 ANDREASON$349 COUGAR$349 MUSTANG$349 ZERO$349 SPORT MODEL KITS STRINGLESS WONDER $249 PECK ROG$139 KITS 0 PLANS S ACCESSORIES CO-2 ENGINES SHARK & BROWN REAL JAPANESE TISSUE-PROPS COMPLETE CATALOG 50 MANY HARD TO FIND ITEMS PeckwPIvmers PO BOX 2498-AMA LA MESA CALIF 92041 PHONE 17141 469-8675 714 442-4636 April 1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA SoIa Film EXCLUSIVE LOW-HEAT COVERING FOR FOAM&BALSA FLYING MODELS flexible ble fuel proof tweight
Edition: Model Aviation - 1977/04
Page Numbers: 23, 24, 25, 84, 85
Ive behaved well enough join great Valhalla Well shes gonna blow nows time becauseOl Muddy down sure big enough quench it And forget Val stuffIm trip intended pure fun sure turned out closest thing work built 32-in span Delta speed model put elec trostatic wing leveler During past five years weve used electrostatic autopilots about 50 different models RPVs flew speeds 100 miles hour less really curious see could make work 200maybe 250 fun parts Houston Club made up some finest people Ive ever met Hard work flying field doesnt bother 16 timers least ten other offi cials duty sitting boonies pushing buttons writing numbers shout ing encouragement hours end no complaints though April 1977 23 Lars Gierts son crank up OPS Charlie Danley gets set go Model uses dolly takeoff Really gets up goestakes dolly along up 4 5 feet before restrainer cord stops Although model small has tremendous lifting power OPS going Boys pass es 228 210 unfortunately flight territory occupied native troops rattlesnakes stable planes George took two conventional speed models wing tail new Delta fitted OPS 60s tuned pipes carburetors worked right made 9-dia 13-in pitch prop go 22000 rpm have idea badly 60 going speed can shake 4-pound airplane Ill tell words George used Hey thing going electrocute really does shake badly feels like youre getting electric shock Dont get impression Im knocking OPS shaker report this bragging hear guys claim have smooth running 60s just much noise just no way counter weight crank can go sideways piston con-rod go up down 22000 times minute shaking liver ing smell out 45 pounds balsa fiberglass inside shaker airplane hoard experience accumulated over six years speed flying during crashed two airplanes year average Thats hard way learn teaches good lessons instance just dont mount servos grommets screws Theyll last about ten minutes way Actually cut grommet lugs off servo cases three servos taped gether single glob packed form-fitting box soft foam sides Yes does make ailerons cou ple up elevator because load surface pushes other servo new place speed flying name game fly straight 300 meters Theres no judge care whether youre doing precision loops other gorgeously perfect stunts So fix surfaces theres no load servos fly straight learn put little right aileron pull up elevator little sacrifice can have servos survive 100 flightsas theyve done airplanes George flying put keepers switches wont vibrate off position counterbalance control surfaces pre vent flutter dont use thin metal tanks because fuel vibrates bangs around inside tank makes fatigue cracks leaks just messy no-no youve got five ounces fuel engine uses three ounces minute full bore Tape connectors receiver battery packs means put keepers control-horn devises thing really dont have worry too much about whether propeller perfectly balanced facts takes really badly balanced prop like maybe piece blade missing come close adding significant vibra tion what can produced piston 24 ModelAviation Houston High Speed Air Force Ito R George Pickrell Maynard Hill Lars Giertz Charlie Denley Charlie has eyes like eagle flies Lars plane front Maynards pair 42in span jobs 32-in delta powered OPS engine Below high-speed squad ronanother view ships photographs above Business end Lars model isa masterpiece clean design No air inlet cowlingengine cooled massive amounts fuel going through engine Mini pipe use during trials tuned pipe will installed future con-rod sort balanced crank shaft Sanding propellers gnats tooth balance waste time Sanding within gnats tooth right pitch different story Getting both blades same correct pitch makes airplanes go faster think flying speed models exciting things can life George have settled rou tine two mouths four eyes intensely strained use airplane taken up about 1500 feet out over end 1000-foot course Its speck sky going 90 miles hour minimum throttle isnt ex actly tickover reason know what control stick saw well enough few seconds ago imag ine would go didnt give dumb controls roll over split S Momentarily totally out sight skinny tail-on aspect passes sec ond later can make out wing speck airplane headed straight down Now Jam throttle forward Let scream straight down second two seconds Zow-eep comes pipe Three seconds ooh wow four Start pulling up level up trap entry 40 feet altitude Zeeewoouw goes past Quick again Pull up end trap chop throttle let coast coasts about 1100-1200 feet low throttle theres speck watch George Im going roll split S again Gone out sight Theres wing again Pour coal second two three Zow-eep four pull up Zeewoouw goes again Fifteen seconds later its again Another 15 again Dont get mixed up Thats way goes Youre very busy about two minutes point run out fuel swoop fast glide swing wide turn come long long flat glide belly landing try get shakes under control figure out what can improved next flight rained first day trials windy during second George managed log 11 flights no fatalities airplanes nearby human beings Reports got 205 mph best legitimate speed average speeds upwind downwind clocks agreeing within two hundredths second Frankly think thats faster radio model has flown FAI World Record attempt think though accepted official rec ord stands 213 mph record set back clocks agree two tenths second favorable legal errors timing system used Soviet modelers could easily produce measurements about 30 40 mph above what model actually flew irony Im partly blame FAIs change 02 02 seconds Art Arro put myth bed Hous ton Formula pylon racer flew flew flew achieved top speed 150 mph get 150 mph 217 mph needed take record would need three times power K&B 40 putting out probably getting close two horsepower Leastwise sounded like using 75%nitro no muffler sure sounded like airplane honking out something fierce sounds deceiving would need six horsepower break record pylon racer Sorry Cliff Weirick just lost argument five years ago no way six horsepower will come out 40 60 matter no way Formula pylon racer will beat existing world speed record exceed record youll need small absolutely clean airplane super honking 60 engine nitro out kazoo tuned pipe need gravity help plus absolute precision putting traps just right get last pos sible benefit overspeed dive Thats illegal guys Aus trians set glider record way secrets also have flywheel engine spins up overspeed during dive stuff does seem possible reach 220 mph conCon tinued page 84 April 1977 25 1972 Gus Geissinger left Vein Smith got clean Supertigre 60 model honest 194 mph measured Dahlgren Model substantially cleaner smaller used Soviets claim 213-mph record Russian model wings rubberbanded fuselage number dirty openings cowl area Vein top engine men country thing made clear Houston Trials speed record can brokenand should during 1977 trials held Maynards Georges engines turned 91/2 x 13 propel lers 22000rpm Planes weighed about 4-1/2 pounds required unique practices youd never dream fast Formula racers Lars Giertz applies know-how prayerful position pilot Charlie Danley cooling nervesa really top-rate skilled competitive team will heard two Plane taken up 1500 feet 90-mph minimum throttle rolled over split-S opened wide dived 40-ft-high pull-up barrel through traps fiLttU&I*i PRODUCTS INC 535 DAVISYILLE ROAD OW GROVE PA 19090 658-3900 call CRAP TRAP* does exactlywhat think Crap Trap name purloined model builder Toledo Finally filter keep modern engines truly clean Call itan IMPURITIES FILTRATION SYSTEM want. call Crap Trap Newer sophisticated carburetors pumps very sensitive fine par ticles can get through filters Crap Trap Heres DOUBLE FILTRATIONIncludes two separate filters 100 mesh 007 openIng 120 mesh 004 opening Patent Applied MORE FILTER AREABoth filters cup-shaped greatly increase filter capacity COLOR CODEDFuel must go through larger silver mesh first filter out larger particles through smaller bronze mesh must WATCH IT WORKFilters encased see-through tubing CAN TAKE THE HEATThe extruded Teflon casing can handle temperatures up soo0 F 1 Between Tank 2 Between Fuel con3 Between Muffler Tank No need re move tubing muffler see tank Youve got try great new filter believe Watch action enjoy model its cleaner smoother-running engine note rpm its ballpark fly see works too low cut span put washout reduce pitch tip Use Fig 2 method get wash out outer span prop flutters give worst enemy start over funny noise rpm lower expected equals flutter will plane go slower stand chance having come apart running C Recomniendations Until someone comes up opti mum prop find major break through will trying following props 1 7-SN Rev-Up Thin TE little cleanup Cut span little necessary may best prop running muffler prop am currently using unmodified 2 7-SN Top Flite has little pitch 1 Clean up form good air foil bad airfoil out box rpm still low trim span slightly 3 7-6N Rev-Up has higher pitch 2 Thin clean up cut span may washout tips get rpm up RPM low out box 4 7-5 Rev-Up has blade area will allow bigger pitch changes anyone learns take advantage Ditto 7-5W Top Flite Dave Lane 4477 136th Hawthorne CA 90250 poductreviewproduetreeieWPVOdUCtrCViCWPrOdUCtrCViW Electric Twin Up now twin-engined electric powered RC scale model has seen kit form combination Model Flite England Polks International offer ing Britten/Norman Islander Powered two Model Flite Hummingbird motors pre wired installation spans 50 ins flying weight 3/a lbs nicad cassette pack 96V allows 8- 10-mm flights 30-mm recharge time Kit includes pre covered foam wings aileron cable stalled vacu-formed nacelles hardware pre cut prefab parts Props Cox6/3 spinners Prices Islander kit $6995 twin motor nicad pack $15995 charging monitor $3995 Polks Model-Craft Hobbies Inc 314 Fifth Ave New York NY 10001 producteiewproduetreviCwPtOdUetrCviWPrOdUCtrGVIeW F writing advertisers mention read about MA Goes/Hill Continued page 25 ventional airplane passes down wind upwind 228 210which would have record hap pened same flight So can done Lars Giertz possible improved tracks Houston smaller airplane what George flying good OPS Because lower total drag could did use 9 diameter propeller lets engine rev up bit 22000 get alls well Unfortu nately Lars aileron flutter prob lem early trials suffered dam age during launch No officials times recorded looked very fast must remember smaller air plane faster appears going Lars no throttle airplane arrangement will take really good pilot avoid having such smaller air plane disappear wild blue yonder out control Secing airplane biggest problems setting speed record Art Arros speed model looked good went over hill first flight due getting out controllable sight range Actually didnt have real chance because powered 40 too large Delta planform airplanes have lower 84 Model Aviation drag given wing area have better potential setting speed rec ord deltas though seeing still bigger problem electrostatic wing leveler put new bird mostly help problem air plane will stay upright pilot takes hands off controls device saved Delta several times during trials time went through sun George shouting Where about 5 seconds fore found would have ground time auto pilot As just kinda got far awaygoing like Concorde Wrong Way Corrigan controls aban doned Delta after three flights trial because some control surface problems looked too big fix time available Maybe next time follow-on article some tech nical stuff about drag horsepower gravity propellers flywheels speed flying will discussed now remaining avail able space must absolutely devoted saying thanks Johnson Space Cen ter Club providing funnest times hobbying Ive ever life George Pickrell feels same superbly organized affair Plenty good workers stuck job lots friendly help always available golly some marvelous senses humor down corner Texas Owen Morris Bert Streigler served Contest Directors John Kiker hosted us super tour im pressive facilities JSC JSC Club members pitched George Pickrell say thank truly wonderful experience full fun glad hard work made possible Howard Bittner set Helicopter speed record also wish could have erased Soviet speed number Please again some time Well pitch thats sure CL Scale/Stott Continued page 26 has past years judges should no longer giving maximum points just because did maneuver flying option now instructed judge performance flight realism quality performance read both articles regard ing scale modeling can understand some discouraged scale takes lot patience determination ability just building flying also become good scale builder Scale easiest areas modeling highly rewarding have correction ALA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS PUCUD Industrle8 Inc 7080 HOLLYWOOD BLVD. LOS ANGELES CA 90028 RUBBER POWERED FLYING MODELS NEW Kits 28INSPAN GIPSY MOiNDee Nit 2 13 IN SPAN P NUT KIT $349 J4 neeVite 1 13 IN SPAN P-NUTKIT $34916 IN SPAN SPORT $349 PEANUT SCALE KITS PIETENPOL$329 MILES$329 TURBULENT$329 PIPER i3 CUB$329 ANDREASON$349 COUGAR$349 MUSTANG$349 ZERO$349 SPORT MODEL KITS STRINGLESS WONDER $249 PECK ROG$139 KITS 0 PLANS S ACCESSORIES CO-2 ENGINES SHARK & BROWN REAL JAPANESE TISSUE-PROPS COMPLETE CATALOG 50 MANY HARD TO FIND ITEMS PeckwPIvmers PO BOX 2498-AMA LA MESA CALIF 92041 PHONE 17141 469-8675 714 442-4636 April 1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA SoIa Film EXCLUSIVE LOW-HEAT COVERING FOR FOAM&BALSA FLYING MODELS flexible ble fuel proof tweight
Edition: Model Aviation - 1977/04
Page Numbers: 23, 24, 25, 84, 85
Ive behaved well enough join great Valhalla Well shes gonna blow nows time becauseOl Muddy down sure big enough quench it And forget Val stuffIm trip intended pure fun sure turned out closest thing work built 32-in span Delta speed model put elec trostatic wing leveler During past five years weve used electrostatic autopilots about 50 different models RPVs flew speeds 100 miles hour less really curious see could make work 200maybe 250 fun parts Houston Club made up some finest people Ive ever met Hard work flying field doesnt bother 16 timers least ten other offi cials duty sitting boonies pushing buttons writing numbers shout ing encouragement hours end no complaints though April 1977 23 Lars Gierts son crank up OPS Charlie Danley gets set go Model uses dolly takeoff Really gets up goestakes dolly along up 4 5 feet before restrainer cord stops Although model small has tremendous lifting power OPS going Boys pass es 228 210 unfortunately flight territory occupied native troops rattlesnakes stable planes George took two conventional speed models wing tail new Delta fitted OPS 60s tuned pipes carburetors worked right made 9-dia 13-in pitch prop go 22000 rpm have idea badly 60 going speed can shake 4-pound airplane Ill tell words George used Hey thing going electrocute really does shake badly feels like youre getting electric shock Dont get impression Im knocking OPS shaker report this bragging hear guys claim have smooth running 60s just much noise just no way counter weight crank can go sideways piston con-rod go up down 22000 times minute shaking liver ing smell out 45 pounds balsa fiberglass inside shaker airplane hoard experience accumulated over six years speed flying during crashed two airplanes year average Thats hard way learn teaches good lessons instance just dont mount servos grommets screws Theyll last about ten minutes way Actually cut grommet lugs off servo cases three servos taped gether single glob packed form-fitting box soft foam sides Yes does make ailerons cou ple up elevator because load surface pushes other servo new place speed flying name game fly straight 300 meters Theres no judge care whether youre doing precision loops other gorgeously perfect stunts So fix surfaces theres no load servos fly straight learn put little right aileron pull up elevator little sacrifice can have servos survive 100 flightsas theyve done airplanes George flying put keepers switches wont vibrate off position counterbalance control surfaces pre vent flutter dont use thin metal tanks because fuel vibrates bangs around inside tank makes fatigue cracks leaks just messy no-no youve got five ounces fuel engine uses three ounces minute full bore Tape connectors receiver battery packs means put keepers control-horn devises thing really dont have worry too much about whether propeller perfectly balanced facts takes really badly balanced prop like maybe piece blade missing come close adding significant vibra tion what can produced piston 24 ModelAviation Houston High Speed Air Force Ito R George Pickrell Maynard Hill Lars Giertz Charlie Denley Charlie has eyes like eagle flies Lars plane front Maynards pair 42in span jobs 32-in delta powered OPS engine Below high-speed squad ronanother view ships photographs above Business end Lars model isa masterpiece clean design No air inlet cowlingengine cooled massive amounts fuel going through engine Mini pipe use during trials tuned pipe will installed future con-rod sort balanced crank shaft Sanding propellers gnats tooth balance waste time Sanding within gnats tooth right pitch different story Getting both blades same correct pitch makes airplanes go faster think flying speed models exciting things can life George have settled rou tine two mouths four eyes intensely strained use airplane taken up about 1500 feet out over end 1000-foot course Its speck sky going 90 miles hour minimum throttle isnt ex actly tickover reason know what control stick saw well enough few seconds ago imag ine would go didnt give dumb controls roll over split S Momentarily totally out sight skinny tail-on aspect passes sec ond later can make out wing speck airplane headed straight down Now Jam throttle forward Let scream straight down second two seconds Zow-eep comes pipe Three seconds ooh wow four Start pulling up level up trap entry 40 feet altitude Zeeewoouw goes past Quick again Pull up end trap chop throttle let coast coasts about 1100-1200 feet low throttle theres speck watch George Im going roll split S again Gone out sight Theres wing again Pour coal second two three Zow-eep four pull up Zeewoouw goes again Fifteen seconds later its again Another 15 again Dont get mixed up Thats way goes Youre very busy about two minutes point run out fuel swoop fast glide swing wide turn come long long flat glide belly landing try get shakes under control figure out what can improved next flight rained first day trials windy during second George managed log 11 flights no fatalities airplanes nearby human beings Reports got 205 mph best legitimate speed average speeds upwind downwind clocks agreeing within two hundredths second Frankly think thats faster radio model has flown FAI World Record attempt think though accepted official rec ord stands 213 mph record set back clocks agree two tenths second favorable legal errors timing system used Soviet modelers could easily produce measurements about 30 40 mph above what model actually flew irony Im partly blame FAIs change 02 02 seconds Art Arro put myth bed Hous ton Formula pylon racer flew flew flew achieved top speed 150 mph get 150 mph 217 mph needed take record would need three times power K&B 40 putting out probably getting close two horsepower Leastwise sounded like using 75%nitro no muffler sure sounded like airplane honking out something fierce sounds deceiving would need six horsepower break record pylon racer Sorry Cliff Weirick just lost argument five years ago no way six horsepower will come out 40 60 matter no way Formula pylon racer will beat existing world speed record exceed record youll need small absolutely clean airplane super honking 60 engine nitro out kazoo tuned pipe need gravity help plus absolute precision putting traps just right get last pos sible benefit overspeed dive Thats illegal guys Aus trians set glider record way secrets also have flywheel engine spins up overspeed during dive stuff does seem possible reach 220 mph conCon tinued page 84 April 1977 25 1972 Gus Geissinger left Vein Smith got clean Supertigre 60 model honest 194 mph measured Dahlgren Model substantially cleaner smaller used Soviets claim 213-mph record Russian model wings rubberbanded fuselage number dirty openings cowl area Vein top engine men country thing made clear Houston Trials speed record can brokenand should during 1977 trials held Maynards Georges engines turned 91/2 x 13 propel lers 22000rpm Planes weighed about 4-1/2 pounds required unique practices youd never dream fast Formula racers Lars Giertz applies know-how prayerful position pilot Charlie Danley cooling nervesa really top-rate skilled competitive team will heard two Plane taken up 1500 feet 90-mph minimum throttle rolled over split-S opened wide dived 40-ft-high pull-up barrel through traps fiLttU&I*i PRODUCTS INC 535 DAVISYILLE ROAD OW GROVE PA 19090 658-3900 call CRAP TRAP* does exactlywhat think Crap Trap name purloined model builder Toledo Finally filter keep modern engines truly clean Call itan IMPURITIES FILTRATION SYSTEM want. call Crap Trap Newer sophisticated carburetors pumps very sensitive fine par ticles can get through filters Crap Trap Heres DOUBLE FILTRATIONIncludes two separate filters 100 mesh 007 openIng 120 mesh 004 opening Patent Applied MORE FILTER AREABoth filters cup-shaped greatly increase filter capacity COLOR CODEDFuel must go through larger silver mesh first filter out larger particles through smaller bronze mesh must WATCH IT WORKFilters encased see-through tubing CAN TAKE THE HEATThe extruded Teflon casing can handle temperatures up soo0 F 1 Between Tank 2 Between Fuel con3 Between Muffler Tank No need re move tubing muffler see tank Youve got try great new filter believe Watch action enjoy model its cleaner smoother-running engine note rpm its ballpark fly see works too low cut span put washout reduce pitch tip Use Fig 2 method get wash out outer span prop flutters give worst enemy start over funny noise rpm lower expected equals flutter will plane go slower stand chance having come apart running C Recomniendations Until someone comes up opti mum prop find major break through will trying following props 1 7-SN Rev-Up Thin TE little cleanup Cut span little necessary may best prop running muffler prop am currently using unmodified 2 7-SN Top Flite has little pitch 1 Clean up form good air foil bad airfoil out box rpm still low trim span slightly 3 7-6N Rev-Up has higher pitch 2 Thin clean up cut span may washout tips get rpm up RPM low out box 4 7-5 Rev-Up has blade area will allow bigger pitch changes anyone learns take advantage Ditto 7-5W Top Flite Dave Lane 4477 136th Hawthorne CA 90250 poductreviewproduetreeieWPVOdUCtrCViCWPrOdUCtrCViW Electric Twin Up now twin-engined electric powered RC scale model has seen kit form combination Model Flite England Polks International offer ing Britten/Norman Islander Powered two Model Flite Hummingbird motors pre wired installation spans 50 ins flying weight 3/a lbs nicad cassette pack 96V allows 8- 10-mm flights 30-mm recharge time Kit includes pre covered foam wings aileron cable stalled vacu-formed nacelles hardware pre cut prefab parts Props Cox6/3 spinners Prices Islander kit $6995 twin motor nicad pack $15995 charging monitor $3995 Polks Model-Craft Hobbies Inc 314 Fifth Ave New York NY 10001 producteiewproduetreviCwPtOdUetrCviWPrOdUCtrGVIeW F writing advertisers mention read about MA Goes/Hill Continued page 25 ventional airplane passes down wind upwind 228 210which would have record hap pened same flight So can done Lars Giertz possible improved tracks Houston smaller airplane what George flying good OPS Because lower total drag could did use 9 diameter propeller lets engine rev up bit 22000 get alls well Unfortu nately Lars aileron flutter prob lem early trials suffered dam age during launch No officials times recorded looked very fast must remember smaller air plane faster appears going Lars no throttle airplane arrangement will take really good pilot avoid having such smaller air plane disappear wild blue yonder out control Secing airplane biggest problems setting speed record Art Arros speed model looked good went over hill first flight due getting out controllable sight range Actually didnt have real chance because powered 40 too large Delta planform airplanes have lower 84 Model Aviation drag given wing area have better potential setting speed rec ord deltas though seeing still bigger problem electrostatic wing leveler put new bird mostly help problem air plane will stay upright pilot takes hands off controls device saved Delta several times during trials time went through sun George shouting Where about 5 seconds fore found would have ground time auto pilot As just kinda got far awaygoing like Concorde Wrong Way Corrigan controls aban doned Delta after three flights trial because some control surface problems looked too big fix time available Maybe next time follow-on article some tech nical stuff about drag horsepower gravity propellers flywheels speed flying will discussed now remaining avail able space must absolutely devoted saying thanks Johnson Space Cen ter Club providing funnest times hobbying Ive ever life George Pickrell feels same superbly organized affair Plenty good workers stuck job lots friendly help always available golly some marvelous senses humor down corner Texas Owen Morris Bert Streigler served Contest Directors John Kiker hosted us super tour im pressive facilities JSC JSC Club members pitched George Pickrell say thank truly wonderful experience full fun glad hard work made possible Howard Bittner set Helicopter speed record also wish could have erased Soviet speed number Please again some time Well pitch thats sure CL Scale/Stott Continued page 26 has past years judges should no longer giving maximum points just because did maneuver flying option now instructed judge performance flight realism quality performance read both articles regard ing scale modeling can understand some discouraged scale takes lot patience determination ability just building flying also become good scale builder Scale easiest areas modeling highly rewarding have correction ALA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS PUCUD Industrle8 Inc 7080 HOLLYWOOD BLVD. LOS ANGELES CA 90028 RUBBER POWERED FLYING MODELS NEW Kits 28INSPAN GIPSY MOiNDee Nit 2 13 IN SPAN P NUT KIT $349 J4 neeVite 1 13 IN SPAN P-NUTKIT $34916 IN SPAN SPORT $349 PEANUT SCALE KITS PIETENPOL$329 MILES$329 TURBULENT$329 PIPER i3 CUB$329 ANDREASON$349 COUGAR$349 MUSTANG$349 ZERO$349 SPORT MODEL KITS STRINGLESS WONDER $249 PECK ROG$139 KITS 0 PLANS S ACCESSORIES CO-2 ENGINES SHARK & BROWN REAL JAPANESE TISSUE-PROPS COMPLETE CATALOG 50 MANY HARD TO FIND ITEMS PeckwPIvmers PO BOX 2498-AMA LA MESA CALIF 92041 PHONE 17141 469-8675 714 442-4636 April 1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA SoIa Film EXCLUSIVE LOW-HEAT COVERING FOR FOAM&BALSA FLYING MODELS flexible ble fuel proof tweight
Edition: Model Aviation - 1977/04
Page Numbers: 23, 24, 25, 84, 85
Ive behaved well enough join great Valhalla Well shes gonna blow nows time becauseOl Muddy down sure big enough quench it And forget Val stuffIm trip intended pure fun sure turned out closest thing work built 32-in span Delta speed model put elec trostatic wing leveler During past five years weve used electrostatic autopilots about 50 different models RPVs flew speeds 100 miles hour less really curious see could make work 200maybe 250 fun parts Houston Club made up some finest people Ive ever met Hard work flying field doesnt bother 16 timers least ten other offi cials duty sitting boonies pushing buttons writing numbers shout ing encouragement hours end no complaints though April 1977 23 Lars Gierts son crank up OPS Charlie Danley gets set go Model uses dolly takeoff Really gets up goestakes dolly along up 4 5 feet before restrainer cord stops Although model small has tremendous lifting power OPS going Boys pass es 228 210 unfortunately flight territory occupied native troops rattlesnakes stable planes George took two conventional speed models wing tail new Delta fitted OPS 60s tuned pipes carburetors worked right made 9-dia 13-in pitch prop go 22000 rpm have idea badly 60 going speed can shake 4-pound airplane Ill tell words George used Hey thing going electrocute really does shake badly feels like youre getting electric shock Dont get impression Im knocking OPS shaker report this bragging hear guys claim have smooth running 60s just much noise just no way counter weight crank can go sideways piston con-rod go up down 22000 times minute shaking liver ing smell out 45 pounds balsa fiberglass inside shaker airplane hoard experience accumulated over six years speed flying during crashed two airplanes year average Thats hard way learn teaches good lessons instance just dont mount servos grommets screws Theyll last about ten minutes way Actually cut grommet lugs off servo cases three servos taped gether single glob packed form-fitting box soft foam sides Yes does make ailerons cou ple up elevator because load surface pushes other servo new place speed flying name game fly straight 300 meters Theres no judge care whether youre doing precision loops other gorgeously perfect stunts So fix surfaces theres no load servos fly straight learn put little right aileron pull up elevator little sacrifice can have servos survive 100 flightsas theyve done airplanes George flying put keepers switches wont vibrate off position counterbalance control surfaces pre vent flutter dont use thin metal tanks because fuel vibrates bangs around inside tank makes fatigue cracks leaks just messy no-no youve got five ounces fuel engine uses three ounces minute full bore Tape connectors receiver battery packs means put keepers control-horn devises thing really dont have worry too much about whether propeller perfectly balanced facts takes really badly balanced prop like maybe piece blade missing come close adding significant vibra tion what can produced piston 24 ModelAviation Houston High Speed Air Force Ito R George Pickrell Maynard Hill Lars Giertz Charlie Denley Charlie has eyes like eagle flies Lars plane front Maynards pair 42in span jobs 32-in delta powered OPS engine Below high-speed squad ronanother view ships photographs above Business end Lars model isa masterpiece clean design No air inlet cowlingengine cooled massive amounts fuel going through engine Mini pipe use during trials tuned pipe will installed future con-rod sort balanced crank shaft Sanding propellers gnats tooth balance waste time Sanding within gnats tooth right pitch different story Getting both blades same correct pitch makes airplanes go faster think flying speed models exciting things can life George have settled rou tine two mouths four eyes intensely strained use airplane taken up about 1500 feet out over end 1000-foot course Its speck sky going 90 miles hour minimum throttle isnt ex actly tickover reason know what control stick saw well enough few seconds ago imag ine would go didnt give dumb controls roll over split S Momentarily totally out sight skinny tail-on aspect passes sec ond later can make out wing speck airplane headed straight down Now Jam throttle forward Let scream straight down second two seconds Zow-eep comes pipe Three seconds ooh wow four Start pulling up level up trap entry 40 feet altitude Zeeewoouw goes past Quick again Pull up end trap chop throttle let coast coasts about 1100-1200 feet low throttle theres speck watch George Im going roll split S again Gone out sight Theres wing again Pour coal second two three Zow-eep four pull up Zeewoouw goes again Fifteen seconds later its again Another 15 again Dont get mixed up Thats way goes Youre very busy about two minutes point run out fuel swoop fast glide swing wide turn come long long flat glide belly landing try get shakes under control figure out what can improved next flight rained first day trials windy during second George managed log 11 flights no fatalities airplanes nearby human beings Reports got 205 mph best legitimate speed average speeds upwind downwind clocks agreeing within two hundredths second Frankly think thats faster radio model has flown FAI World Record attempt think though accepted official rec ord stands 213 mph record set back clocks agree two tenths second favorable legal errors timing system used Soviet modelers could easily produce measurements about 30 40 mph above what model actually flew irony Im partly blame FAIs change 02 02 seconds Art Arro put myth bed Hous ton Formula pylon racer flew flew flew achieved top speed 150 mph get 150 mph 217 mph needed take record would need three times power K&B 40 putting out probably getting close two horsepower Leastwise sounded like using 75%nitro no muffler sure sounded like airplane honking out something fierce sounds deceiving would need six horsepower break record pylon racer Sorry Cliff Weirick just lost argument five years ago no way six horsepower will come out 40 60 matter no way Formula pylon racer will beat existing world speed record exceed record youll need small absolutely clean airplane super honking 60 engine nitro out kazoo tuned pipe need gravity help plus absolute precision putting traps just right get last pos sible benefit overspeed dive Thats illegal guys Aus trians set glider record way secrets also have flywheel engine spins up overspeed during dive stuff does seem possible reach 220 mph conCon tinued page 84 April 1977 25 1972 Gus Geissinger left Vein Smith got clean Supertigre 60 model honest 194 mph measured Dahlgren Model substantially cleaner smaller used Soviets claim 213-mph record Russian model wings rubberbanded fuselage number dirty openings cowl area Vein top engine men country thing made clear Houston Trials speed record can brokenand should during 1977 trials held Maynards Georges engines turned 91/2 x 13 propel lers 22000rpm Planes weighed about 4-1/2 pounds required unique practices youd never dream fast Formula racers Lars Giertz applies know-how prayerful position pilot Charlie Danley cooling nervesa really top-rate skilled competitive team will heard two Plane taken up 1500 feet 90-mph minimum throttle rolled over split-S opened wide dived 40-ft-high pull-up barrel through traps fiLttU&I*i PRODUCTS INC 535 DAVISYILLE ROAD OW GROVE PA 19090 658-3900 call CRAP TRAP* does exactlywhat think Crap Trap name purloined model builder Toledo Finally filter keep modern engines truly clean Call itan IMPURITIES FILTRATION SYSTEM want. call Crap Trap Newer sophisticated carburetors pumps very sensitive fine par ticles can get through filters Crap Trap Heres DOUBLE FILTRATIONIncludes two separate filters 100 mesh 007 openIng 120 mesh 004 opening Patent Applied MORE FILTER AREABoth filters cup-shaped greatly increase filter capacity COLOR CODEDFuel must go through larger silver mesh first filter out larger particles through smaller bronze mesh must WATCH IT WORKFilters encased see-through tubing CAN TAKE THE HEATThe extruded Teflon casing can handle temperatures up soo0 F 1 Between Tank 2 Between Fuel con3 Between Muffler Tank No need re move tubing muffler see tank Youve got try great new filter believe Watch action enjoy model its cleaner smoother-running engine note rpm its ballpark fly see works too low cut span put washout reduce pitch tip Use Fig 2 method get wash out outer span prop flutters give worst enemy start over funny noise rpm lower expected equals flutter will plane go slower stand chance having come apart running C Recomniendations Until someone comes up opti mum prop find major break through will trying following props 1 7-SN Rev-Up Thin TE little cleanup Cut span little necessary may best prop running muffler prop am currently using unmodified 2 7-SN Top Flite has little pitch 1 Clean up form good air foil bad airfoil out box rpm still low trim span slightly 3 7-6N Rev-Up has higher pitch 2 Thin clean up cut span may washout tips get rpm up RPM low out box 4 7-5 Rev-Up has blade area will allow bigger pitch changes anyone learns take advantage Ditto 7-5W Top Flite Dave Lane 4477 136th Hawthorne CA 90250 poductreviewproduetreeieWPVOdUCtrCViCWPrOdUCtrCViW Electric Twin Up now twin-engined electric powered RC scale model has seen kit form combination Model Flite England Polks International offer ing Britten/Norman Islander Powered two Model Flite Hummingbird motors pre wired installation spans 50 ins flying weight 3/a lbs nicad cassette pack 96V allows 8- 10-mm flights 30-mm recharge time Kit includes pre covered foam wings aileron cable stalled vacu-formed nacelles hardware pre cut prefab parts Props Cox6/3 spinners Prices Islander kit $6995 twin motor nicad pack $15995 charging monitor $3995 Polks Model-Craft Hobbies Inc 314 Fifth Ave New York NY 10001 producteiewproduetreviCwPtOdUetrCviWPrOdUCtrGVIeW F writing advertisers mention read about MA Goes/Hill Continued page 25 ventional airplane passes down wind upwind 228 210which would have record hap pened same flight So can done Lars Giertz possible improved tracks Houston smaller airplane what George flying good OPS Because lower total drag could did use 9 diameter propeller lets engine rev up bit 22000 get alls well Unfortu nately Lars aileron flutter prob lem early trials suffered dam age during launch No officials times recorded looked very fast must remember smaller air plane faster appears going Lars no throttle airplane arrangement will take really good pilot avoid having such smaller air plane disappear wild blue yonder out control Secing airplane biggest problems setting speed record Art Arros speed model looked good went over hill first flight due getting out controllable sight range Actually didnt have real chance because powered 40 too large Delta planform airplanes have lower 84 Model Aviation drag given wing area have better potential setting speed rec ord deltas though seeing still bigger problem electrostatic wing leveler put new bird mostly help problem air plane will stay upright pilot takes hands off controls device saved Delta several times during trials time went through sun George shouting Where about 5 seconds fore found would have ground time auto pilot As just kinda got far awaygoing like Concorde Wrong Way Corrigan controls aban doned Delta after three flights trial because some control surface problems looked too big fix time available Maybe next time follow-on article some tech nical stuff about drag horsepower gravity propellers flywheels speed flying will discussed now remaining avail able space must absolutely devoted saying thanks Johnson Space Cen ter Club providing funnest times hobbying Ive ever life George Pickrell feels same superbly organized affair Plenty good workers stuck job lots friendly help always available golly some marvelous senses humor down corner Texas Owen Morris Bert Streigler served Contest Directors John Kiker hosted us super tour im pressive facilities JSC JSC Club members pitched George Pickrell say thank truly wonderful experience full fun glad hard work made possible Howard Bittner set Helicopter speed record also wish could have erased Soviet speed number Please again some time Well pitch thats sure CL Scale/Stott Continued page 26 has past years judges should no longer giving maximum points just because did maneuver flying option now instructed judge performance flight realism quality performance read both articles regard ing scale modeling can understand some discouraged scale takes lot patience determination ability just building flying also become good scale builder Scale easiest areas modeling highly rewarding have correction ALA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS PUCUD Industrle8 Inc 7080 HOLLYWOOD BLVD. LOS ANGELES CA 90028 RUBBER POWERED FLYING MODELS NEW Kits 28INSPAN GIPSY MOiNDee Nit 2 13 IN SPAN P NUT KIT $349 J4 neeVite 1 13 IN SPAN P-NUTKIT $34916 IN SPAN SPORT $349 PEANUT SCALE KITS PIETENPOL$329 MILES$329 TURBULENT$329 PIPER i3 CUB$329 ANDREASON$349 COUGAR$349 MUSTANG$349 ZERO$349 SPORT MODEL KITS STRINGLESS WONDER $249 PECK ROG$139 KITS 0 PLANS S ACCESSORIES CO-2 ENGINES SHARK & BROWN REAL JAPANESE TISSUE-PROPS COMPLETE CATALOG 50 MANY HARD TO FIND ITEMS PeckwPIvmers PO BOX 2498-AMA LA MESA CALIF 92041 PHONE 17141 469-8675 714 442-4636 April 1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA SoIa Film EXCLUSIVE LOW-HEAT COVERING FOR FOAM&BALSA FLYING MODELS flexible ble fuel proof tweight
Edition: Model Aviation - 1977/04
Page Numbers: 23, 24, 25, 84, 85
Ive behaved well enough join great Valhalla Well shes gonna blow nows time becauseOl Muddy down sure big enough quench it And forget Val stuffIm trip intended pure fun sure turned out closest thing work built 32-in span Delta speed model put elec trostatic wing leveler During past five years weve used electrostatic autopilots about 50 different models RPVs flew speeds 100 miles hour less really curious see could make work 200maybe 250 fun parts Houston Club made up some finest people Ive ever met Hard work flying field doesnt bother 16 timers least ten other offi cials duty sitting boonies pushing buttons writing numbers shout ing encouragement hours end no complaints though April 1977 23 Lars Gierts son crank up OPS Charlie Danley gets set go Model uses dolly takeoff Really gets up goestakes dolly along up 4 5 feet before restrainer cord stops Although model small has tremendous lifting power OPS going Boys pass es 228 210 unfortunately flight territory occupied native troops rattlesnakes stable planes George took two conventional speed models wing tail new Delta fitted OPS 60s tuned pipes carburetors worked right made 9-dia 13-in pitch prop go 22000 rpm have idea badly 60 going speed can shake 4-pound airplane Ill tell words George used Hey thing going electrocute really does shake badly feels like youre getting electric shock Dont get impression Im knocking OPS shaker report this bragging hear guys claim have smooth running 60s just much noise just no way counter weight crank can go sideways piston con-rod go up down 22000 times minute shaking liver ing smell out 45 pounds balsa fiberglass inside shaker airplane hoard experience accumulated over six years speed flying during crashed two airplanes year average Thats hard way learn teaches good lessons instance just dont mount servos grommets screws Theyll last about ten minutes way Actually cut grommet lugs off servo cases three servos taped gether single glob packed form-fitting box soft foam sides Yes does make ailerons cou ple up elevator because load surface pushes other servo new place speed flying name game fly straight 300 meters Theres no judge care whether youre doing precision loops other gorgeously perfect stunts So fix surfaces theres no load servos fly straight learn put little right aileron pull up elevator little sacrifice can have servos survive 100 flightsas theyve done airplanes George flying put keepers switches wont vibrate off position counterbalance control surfaces pre vent flutter dont use thin metal tanks because fuel vibrates bangs around inside tank makes fatigue cracks leaks just messy no-no youve got five ounces fuel engine uses three ounces minute full bore Tape connectors receiver battery packs means put keepers control-horn devises thing really dont have worry too much about whether propeller perfectly balanced facts takes really badly balanced prop like maybe piece blade missing come close adding significant vibra tion what can produced piston 24 ModelAviation Houston High Speed Air Force Ito R George Pickrell Maynard Hill Lars Giertz Charlie Denley Charlie has eyes like eagle flies Lars plane front Maynards pair 42in span jobs 32-in delta powered OPS engine Below high-speed squad ronanother view ships photographs above Business end Lars model isa masterpiece clean design No air inlet cowlingengine cooled massive amounts fuel going through engine Mini pipe use during trials tuned pipe will installed future con-rod sort balanced crank shaft Sanding propellers gnats tooth balance waste time Sanding within gnats tooth right pitch different story Getting both blades same correct pitch makes airplanes go faster think flying speed models exciting things can life George have settled rou tine two mouths four eyes intensely strained use airplane taken up about 1500 feet out over end 1000-foot course Its speck sky going 90 miles hour minimum throttle isnt ex actly tickover reason know what control stick saw well enough few seconds ago imag ine would go didnt give dumb controls roll over split S Momentarily totally out sight skinny tail-on aspect passes sec ond later can make out wing speck airplane headed straight down Now Jam throttle forward Let scream straight down second two seconds Zow-eep comes pipe Three seconds ooh wow four Start pulling up level up trap entry 40 feet altitude Zeeewoouw goes past Quick again Pull up end trap chop throttle let coast coasts about 1100-1200 feet low throttle theres speck watch George Im going roll split S again Gone out sight Theres wing again Pour coal second two three Zow-eep four pull up Zeewoouw goes again Fifteen seconds later its again Another 15 again Dont get mixed up Thats way goes Youre very busy about two minutes point run out fuel swoop fast glide swing wide turn come long long flat glide belly landing try get shakes under control figure out what can improved next flight rained first day trials windy during second George managed log 11 flights no fatalities airplanes nearby human beings Reports got 205 mph best legitimate speed average speeds upwind downwind clocks agreeing within two hundredths second Frankly think thats faster radio model has flown FAI World Record attempt think though accepted official rec ord stands 213 mph record set back clocks agree two tenths second favorable legal errors timing system used Soviet modelers could easily produce measurements about 30 40 mph above what model actually flew irony Im partly blame FAIs change 02 02 seconds Art Arro put myth bed Hous ton Formula pylon racer flew flew flew achieved top speed 150 mph get 150 mph 217 mph needed take record would need three times power K&B 40 putting out probably getting close two horsepower Leastwise sounded like using 75%nitro no muffler sure sounded like airplane honking out something fierce sounds deceiving would need six horsepower break record pylon racer Sorry Cliff Weirick just lost argument five years ago no way six horsepower will come out 40 60 matter no way Formula pylon racer will beat existing world speed record exceed record youll need small absolutely clean airplane super honking 60 engine nitro out kazoo tuned pipe need gravity help plus absolute precision putting traps just right get last pos sible benefit overspeed dive Thats illegal guys Aus trians set glider record way secrets also have flywheel engine spins up overspeed during dive stuff does seem possible reach 220 mph conCon tinued page 84 April 1977 25 1972 Gus Geissinger left Vein Smith got clean Supertigre 60 model honest 194 mph measured Dahlgren Model substantially cleaner smaller used Soviets claim 213-mph record Russian model wings rubberbanded fuselage number dirty openings cowl area Vein top engine men country thing made clear Houston Trials speed record can brokenand should during 1977 trials held Maynards Georges engines turned 91/2 x 13 propel lers 22000rpm Planes weighed about 4-1/2 pounds required unique practices youd never dream fast Formula racers Lars Giertz applies know-how prayerful position pilot Charlie Danley cooling nervesa really top-rate skilled competitive team will heard two Plane taken up 1500 feet 90-mph minimum throttle rolled over split-S opened wide dived 40-ft-high pull-up barrel through traps fiLttU&I*i PRODUCTS INC 535 DAVISYILLE ROAD OW GROVE PA 19090 658-3900 call CRAP TRAP* does exactlywhat think Crap Trap name purloined model builder Toledo Finally filter keep modern engines truly clean Call itan IMPURITIES FILTRATION SYSTEM want. call Crap Trap Newer sophisticated carburetors pumps very sensitive fine par ticles can get through filters Crap Trap Heres DOUBLE FILTRATIONIncludes two separate filters 100 mesh 007 openIng 120 mesh 004 opening Patent Applied MORE FILTER AREABoth filters cup-shaped greatly increase filter capacity COLOR CODEDFuel must go through larger silver mesh first filter out larger particles through smaller bronze mesh must WATCH IT WORKFilters encased see-through tubing CAN TAKE THE HEATThe extruded Teflon casing can handle temperatures up soo0 F 1 Between Tank 2 Between Fuel con3 Between Muffler Tank No need re move tubing muffler see tank Youve got try great new filter believe Watch action enjoy model its cleaner smoother-running engine note rpm its ballpark fly see works too low cut span put washout reduce pitch tip Use Fig 2 method get wash out outer span prop flutters give worst enemy start over funny noise rpm lower expected equals flutter will plane go slower stand chance having come apart running C Recomniendations Until someone comes up opti mum prop find major break through will trying following props 1 7-SN Rev-Up Thin TE little cleanup Cut span little necessary may best prop running muffler prop am currently using unmodified 2 7-SN Top Flite has little pitch 1 Clean up form good air foil bad airfoil out box rpm still low trim span slightly 3 7-6N Rev-Up has higher pitch 2 Thin clean up cut span may washout tips get rpm up RPM low out box 4 7-5 Rev-Up has blade area will allow bigger pitch changes anyone learns take advantage Ditto 7-5W Top Flite Dave Lane 4477 136th Hawthorne CA 90250 poductreviewproduetreeieWPVOdUCtrCViCWPrOdUCtrCViW Electric Twin Up now twin-engined electric powered RC scale model has seen kit form combination Model Flite England Polks International offer ing Britten/Norman Islander Powered two Model Flite Hummingbird motors pre wired installation spans 50 ins flying weight 3/a lbs nicad cassette pack 96V allows 8- 10-mm flights 30-mm recharge time Kit includes pre covered foam wings aileron cable stalled vacu-formed nacelles hardware pre cut prefab parts Props Cox6/3 spinners Prices Islander kit $6995 twin motor nicad pack $15995 charging monitor $3995 Polks Model-Craft Hobbies Inc 314 Fifth Ave New York NY 10001 producteiewproduetreviCwPtOdUetrCviWPrOdUCtrGVIeW F writing advertisers mention read about MA Goes/Hill Continued page 25 ventional airplane passes down wind upwind 228 210which would have record hap pened same flight So can done Lars Giertz possible improved tracks Houston smaller airplane what George flying good OPS Because lower total drag could did use 9 diameter propeller lets engine rev up bit 22000 get alls well Unfortu nately Lars aileron flutter prob lem early trials suffered dam age during launch No officials times recorded looked very fast must remember smaller air plane faster appears going Lars no throttle airplane arrangement will take really good pilot avoid having such smaller air plane disappear wild blue yonder out control Secing airplane biggest problems setting speed record Art Arros speed model looked good went over hill first flight due getting out controllable sight range Actually didnt have real chance because powered 40 too large Delta planform airplanes have lower 84 Model Aviation drag given wing area have better potential setting speed rec ord deltas though seeing still bigger problem electrostatic wing leveler put new bird mostly help problem air plane will stay upright pilot takes hands off controls device saved Delta several times during trials time went through sun George shouting Where about 5 seconds fore found would have ground time auto pilot As just kinda got far awaygoing like Concorde Wrong Way Corrigan controls aban doned Delta after three flights trial because some control surface problems looked too big fix time available Maybe next time follow-on article some tech nical stuff about drag horsepower gravity propellers flywheels speed flying will discussed now remaining avail able space must absolutely devoted saying thanks Johnson Space Cen ter Club providing funnest times hobbying Ive ever life George Pickrell feels same superbly organized affair Plenty good workers stuck job lots friendly help always available golly some marvelous senses humor down corner Texas Owen Morris Bert Streigler served Contest Directors John Kiker hosted us super tour im pressive facilities JSC JSC Club members pitched George Pickrell say thank truly wonderful experience full fun glad hard work made possible Howard Bittner set Helicopter speed record also wish could have erased Soviet speed number Please again some time Well pitch thats sure CL Scale/Stott Continued page 26 has past years judges should no longer giving maximum points just because did maneuver flying option now instructed judge performance flight realism quality performance read both articles regard ing scale modeling can understand some discouraged scale takes lot patience determination ability just building flying also become good scale builder Scale easiest areas modeling highly rewarding have correction ALA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS PUCUD Industrle8 Inc 7080 HOLLYWOOD BLVD. LOS ANGELES CA 90028 RUBBER POWERED FLYING MODELS NEW Kits 28INSPAN GIPSY MOiNDee Nit 2 13 IN SPAN P NUT KIT $349 J4 neeVite 1 13 IN SPAN P-NUTKIT $34916 IN SPAN SPORT $349 PEANUT SCALE KITS PIETENPOL$329 MILES$329 TURBULENT$329 PIPER i3 CUB$329 ANDREASON$349 COUGAR$349 MUSTANG$349 ZERO$349 SPORT MODEL KITS STRINGLESS WONDER $249 PECK ROG$139 KITS 0 PLANS S ACCESSORIES CO-2 ENGINES SHARK & BROWN REAL JAPANESE TISSUE-PROPS COMPLETE CATALOG 50 MANY HARD TO FIND ITEMS PeckwPIvmers PO BOX 2498-AMA LA MESA CALIF 92041 PHONE 17141 469-8675 714 442-4636 April 1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA SoIa Film EXCLUSIVE LOW-HEAT COVERING FOR FOAM&BALSA FLYING MODELS flexible ble fuel proof tweight