QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW
Edition: Model Aviation - 1976/06
Page Numbers: 4, 5, 6, 7, 8, 90, 91, 92
QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW
Edition: Model Aviation - 1976/06
Page Numbers: 4, 5, 6, 7, 8, 90, 91, 92
QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW
Edition: Model Aviation - 1976/06
Page Numbers: 4, 5, 6, 7, 8, 90, 91, 92
QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW
Edition: Model Aviation - 1976/06
Page Numbers: 4, 5, 6, 7, 8, 90, 91, 92
QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW
Edition: Model Aviation - 1976/06
Page Numbers: 4, 5, 6, 7, 8, 90, 91, 92
QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW
Edition: Model Aviation - 1976/06
Page Numbers: 4, 5, 6, 7, 8, 90, 91, 92
QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW
Edition: Model Aviation - 1976/06
Page Numbers: 4, 5, 6, 7, 8, 90, 91, 92
QUICISUYFR MANY WORDS have written about fun Pylon Racing Well doesnt take long after mixing capability competitiveness before Fun spelled Win Win means Fast Northwest Pylon Racing has really grown developed dont believe everything read Cali fornia serious racing event terms number participants number races held clear fa vorite latest vintage Racer gen erally fastest models local field flat-out speeds approach ing 90 honest mph speed flown around short course means race times 120s combined Half-A RC Pylon coming like gang busters addition plans instructions article round-up latest state-of-the-art ship itself among fastest country Vince Calouri 24000 25000 rpm TD howl can generate large chunks excitement however reasons its popularity wed racing Formula Clearly done right offers racing least work money true both participants administrators points view form flat-out competitive racing can held RC field great deal special equipment Although good deal common sense involved mula apprehension about safety Cox TD less $20 competitive engine no $100 controversy simple two-channel radio will no callers flagmen winning left primarily hands good aggressive flier Best though its fast furious its still fun Now absolutely convinced try racing jump right top QuickSilver presented article about clean airplane can build result several development cycles Ill tell about pass along summary latest engines pressure fuel systems fuels props Youll also find description racing rules follow should allow start own racing event exists area 4 Model Aviation Closeup engine cowlingnote fuel pinch-off body exit nose shape course dictates penbladder fuel system Use soft thin metal sheet shroud personification speed exhibited line design sleek roundedoff fuselage shrouded cylinder needle nose Flat-out speeds newer 1/2A speedsters approach honest 90 mphwhich means times 120s 2450025000 rpm Induced drag minimized Airplane Like people started 1971 RCM rules laid out around Upstart type Ace foam-wing airplane kinda resembles real racing airplane second year racing 1973 mold broken Nelson Eddy brought out first low-aspect-ratio wing airplane buried everybody legalized belly wheels LIT Special Fly ing Models magazine Aug 1974 conformance rule dropped 1974 whole rash new airplanes representing second generation sported low-aspect-ratio wings few buried wheels started look like racers instead miniatures racers Pressure systems common started go fast Lap times 140s normal times middle 130s being turned really fast Leading really fast pack Bob Mikkos Snake introduced needle nose fiberglass engine cowl round body lowest wetted area QuickSilver belongs 1975s third generation racer incorporates low-aspect-ratio wing Gene Weavers exact cleanly mounted rounded body needle-nose engine cowling buried wheels engine cylinder fairing/cool ing shroud Although might other wise nOse shape dictates pen bladder fuel system fast proven its first outing took five straight wins best time 128 very easy airplane fly extremely smooth highly damped pitch makes groovy Highly damped pitch means large horizontal stabilizer easy way draw vertical make respectable percentage horizontal after cant have too much stability right previous airplanes therefore have always large verticals have also always exhibited annoying tail wiggle turns commonly called Quick Fly dance has got slow airplane down Without entering long explanation its apparent too much directional stability coupled little dihedral can lead problem Theres no dihedral QuickSilver wing vertical small fuselage round behind wing well front Making less effective terms stability has slightest trace dance Additional verification can found newer pattern airplanes sport good deal forward fuse lage area therefore reducing directional stability also eliminating pre knife-edge designs tendency dance wing key element high performance design Its low aspect ratio makes simple build light low aspect ratio large chord also result thinner wing terms thickness percent chord June 1976 5 Top Layout fuselage components prior assembly simpler design fewer parts Middle Bulkheads longerons installed side other ready cemented place longerons corner pieces triangle stock Bottom fuselage complete ex cept upper lower planking Razor saw cuts longerons allows bend Rounding off job razor plane sandpaper blocklike falling off log QuickSilver higher operating Reynolds number factors add up follows lightly loaded airplane will pull high-lift coeffi cient turn therefore keeping induced drag minimum sec tion drag very much dependent per cent thickness size/speed regime Reynolds number Obviously its important keep weight minimum fly type airplane around turns instead giving quick yank round fuselage very little addi tional trouble construct slabsided model since size takes some large triangular stock longe rons sandpaper engine cowls really easy build fabricated nose cowl male mold tack-cementing appropriately sized piece balsa firewall sanding shape sanding rest fuselage will help draw some lines balsa indicate minimum size specifi cally nose ring planform top view As shown pictures MINIMUM7 used very easy does method just wrapped piece glass cloth around mold added some epoxy glue pinned place let dry hardest part getting off mold sheet metal cylinder fairing can made soft thin sheet metal have handy tin can some K&S sheet stock fine thing would add shown plans spacer between top cowl engine mount Any piece brass tubing big enough bolt cut right length will work fine will AEL i1r~1Jr- cI11zz- IIIiiriiiII IIII~IIII SEE1IIIiIII II -ii-- --H II jl---11I /1650 LINE FORII DASHRIBS III IiI II r& LY ~5/32 I-It--I hA TE STOC viB WNYLflN BEAJ8NG TORQUE RCO ALL WING RIBS 3/32 EXCEPT 3/16 AT CENTER & TIPS FUSELADE LONGERJNS MUST TO ALLOW NGtIG -USE RA3JR SAW AFTER GLUING TO SOES -CUT /2 IN 3 PLACES 3/8ONCE USE TATOIE MEQ PEN BLADDER CUTOOWN B 3/8-GOW FOR 20Z DRILL FOR FUEL LINE GLASS CLOTHEPOXY COWL CL- ___ HARDAlOOD BLOCKS1/8 BRASS TUBING SERWI PAXJNT SCiNGSHOWj -CG NLON MINI LINK 1/16 I-OLE FOR MINI TYPE ONL KPS -12LR/RS -45 ETC3/8X 1/4 HARI WOOD CONTR ELEVAT AILERC DO IBY1 SIDES -- CUTABEND COWL ___DRILL& TAP FOR 8-32 _____ RJM THIN SHEET NETAL4J1K4TOP& SIDE OMITTED IN FUSELAGE3/BXV2HARD#/OOO VIEWS FOR CLARITYNYLD~ HOLDOAN BOLT - -256 TAPPEDFOR HATCH3/32 BALSA INTO MOUNTALIGNMENT FILLER3/32 SEET TOP& BOTlOM TO 049/051N02 SCREW USE CDX Sx4BLACKPROP I - FMINAL DRY -- PLY DOUBLERTL- KMO5 MOUNT--1/28 STOCK X-SEcrONALAREAI2S75X315I -I22l5I-3 /i LT PLY DRLL FOR MOLRIJT & ADD BUND NUTS 115 PLY3/1617 SFECF1CAT /3/32 BALSA WtIG~N-2&5 0F CHORD-7 GOF SECTkN41I7% / -ASPECT RATIOK [LiizL1TAIL t$i14j~4O VRflCAL-IOSin FUSE X-SEC1UN -B&T Y WEIGHT-lBSoz WEELS -OPTNAL 6 Model Aviation prevent bending cowl tighten hold-down bolt can leave cowl off promise effective both reducing drag exposed cylinder cooling standpoint tightly fit cowl will force cooling air through fins instead around very simple air plane build plans detailed Keep everything true control system tight will go great Engine Props Fuel Now weve got clean airframe have make go fast can cant go -1 TZ--r II _ OPTIONAL WING TIPS SOFT BALSA EL1/4 V8 NY FREE PLAY V8BALSA II j CG SHORT HORN lN MINI LINK 3/16 CHILL PUSHACX HOLE AFTER GLUING SIDES TOGETI-ER -OROSR 75 Silwr ERD AA-OS 7% -2412I/2A PYLON RACER o /975 PROPS RLLES 4~ON4AN BY WMT CAL WRI 9tEL8ENT 10 AE NAVER MV BOB AeIAV _____1 4 1976 7 test other data Ive accumulated will pass along results First Ill give calibration point Using stock Cox 5 X 4 black plastic prop great engine will turn 23500 rpm good will between Below metal mount theCox TD should make tight snug fit between cowl blocks have truly competitive engine use Cox 5 x 4 black nylon Right Brass tubing crimped soldered aileron fittings Above The penbladder tank inflated 2 os fuel Note use spring-loaded paper clip pinch off fuel line Penbladders give consistent pressure pressure systems creasing rpms Below Wide body makes comfortable radio installation Left male mold cowl made tack gluing block firewall shaping fuselage Glass cloth wrapped around epoxy added allowed dry Below Check carefully fit cowl engine cylinder venturi QuickSilver 22500 23000 rpm competi tive engine will tach around 22000 rpm static ground rpm good engine putting out approximately 2 bhp thats really honking bodys standards youre doing well figures indicate read doing better please write share rest us No has found universal engine re work will result good great results What takes large venturi appetite quenched lots pressure-fed nitromethane good cylinder loose cylinder-to-piston fit latter point cant overem phasized tight fitting engine will generate rpm will likely break run high-nitro fuel So number engine list getting good cylinder/piston fit two ways getting can go through long careful break-in several hours can lap piston cylinder Lapping neither difficult nor dangerous engine will pay off older engine its still tight Use fine abrasive such household cleaners Ajax etc automobile rubbing/polishing compound use Dupont #7 rubbing compound Coat cylinder walls abrasive gradually work piston up down industrious insert piece dowel rods crank-pin hole handle apply lot patience finger power tendencies like have old crank case around can make handy lapping tool Modify case sanding away about material cylinder seat done cylinder will sit closer crankshaft allowing piston reach past top cylinder bore Now can lap turning prop procedure done crankcase backplate cylinder head engine sure crank pin pistol ball lubricated know have gone far enough Check regularly thoroughly washing lots hot water seeing dry piston will fall back its own weight after being pushed just past top bore Dupont #7 handy cause water soluble really cleans up nicely loose engine will feel though has very little compression remember its running hot fit after piston should have frosted look after run two thin highly pol ished band should develop crown properly fit engine will run faster will also start easier Open up venturi 5/32 inch recommended Cox replace stock needle Kirn-Kraft needle valve assembly latter essential youre running high-pressure system like pen-bladder standard needle will far too sensitive thing will need order get now loose engine competitive rpms high-nitro fuel high nitro mean between 65 70% volume continued page 90 Vince completed QuickSilver Large stab lizer area good dampener Fin small Ship has no tendency dance Low aspect wing light strong minimizes drag speed 8 Model Aviation skilled pilot good plane unmodified engine should getting share trophies handed out Some designers going larger air planes effort improve scores Detroit area modelers have moving direction past couple years weight engine fuel system controls essentially constant larger model will have lighter wing loading should able fly slower slight reduction high speed now compensated improved low speed performance larger models easier handle low speed Some modelers taking advantage reduced emphasis brute power build dual-purpose airplanes ships will compete Class Supertigre 40 Class II Supertigre 46 weighs same has same mounting 40 Engines dissimi lar mounting holes could used just well using RC type radial engine mount changing mount along engine Speed Control Harry Higley reports good success K&B 65 cc engine using HP 61 throttle crankcase pressure Harry does use exhaust restrictor carb HP carb available through Nelson Model Products Chicago modification needed turn down base throttle will fit K&B backplate New Products mentioned new G-S Products Corp three-line handle review G-S bellcrank last year Ive chance look production ver sions both units look good Both operate very freely handle similar Sturdi-built handle some important changes G-S handle uses steel throughout instead aluminum G-S unit has 24% greater throttle movement throttle trigger posi tioned loser rear handle much comfortable probably anyone else flies hand G-S handle has much clearance around lines exit handle low throttle handle can moved up down 600 before lines contact handle framea four-fold improvement area G-S Products Corp Intl PO Box 488 LaGrande OR 97850 address 5016 Angelita Ave Dayton OH 45424 RC Scale/Atkinson continued page 77 military aircraft three-views Famous Fighters Second World War Wil ham Green printed England Coverage extensive several volumes fighters others bombers books may obtained book stores throughout country maintain aviation section Smithsonian Institution Washing ton DC excellent source mili tary aircraft pictures three-views have service public cost actual cost printing pictures and/or three-views aircraft ever produced military Smithsonian will have record cluding one-of-a-kind unusual sub jects Write Smithsonian giving name designation aircraft seeking will advise cost what information have usually takes four six weeks because have requests pic ture XP-81 column example excellent photographs rare birdonly two three built turbo-prop Note blacked out number tail nose picture taken later years WW II obtained picture Smithsonian Institution several years ago address National Air Museum Washington DC subject three-views drawings probably largest col lections scale plans kits affiliated parts such glass cowls canopies spin ners etc stocked Bob Holman Plans PO Box 741 San Bernardino CA 92402 Bob has dozens cetailed scale plans some worlds best scale build ers constantly expanding scale kit line just too men tion drop Bob line obtain complete catalog fine line scale plans kits address 734 North Sixth St Terrace Blue Springs MO 64015 QuickSilver continued page 8 nitro content atutomatically elimi nates castor oil fuel mix just will blend will need 100% synthetic oil like Klotz Ucon careful because Klotz also markets 2-cycle oil labeled Racing Oil 100% synthetic contains substantial percent age bean oil ideal applications kind fuel mix talked John Klotz about gave following identifying numbers 100% synthetic KL-200 KL-208 KL-300 labeled high performance snowmobile oil same others Use least 20% oil mix 22% preferable benefits will immediately notice 100% synthetic oil fuel clean burns top piston will stay looking brand new will never have clean out varnish formations re mainder fuel mix methanol minimum percentage 5% Dont try run nitro oil will result severe detonation get competitive engine up good great wish could give straightforward answer difference appears fit crankshaft crankcase compression ratio size cylinder bypass ports really good engine Ive seen wide bypasses Get few cylinders gether examination youll soon see difference ports Jim Chary Racing offered reworked cylinder wide deep raised ports Un90 Model Aviation CL Navy Carrier continued Langleys Model Aero Engine 1903 Robert Meyer Curator National Air & Space Museum Smithsonian Institution Illustrated orical Collectors Item $500 Cumberland Press 4926 Del Ray Avenue Bethesda Maryland 20014 fortunately firm no longer business Reworking cylinder bypass ports can very difficult task really should undertaken unless ready scrap cylinder Most engines will respond compressionratio changes can achieve removing glow plug gaskets turning down face plug rotat ing cylinder removing material its crankcase seat good engines have left alone respect except running glow plug gasket others have good results area other engine work can dc has produced either significant consistent results Above patient because TDs seem get better age running time Frankly good way get lots hot fuel loose engine pen-bladder system simple light just about foolproof Besides air leaks crankcase flooding crankcase pressure systems last straw its dependency engine rpm higher rpm higher pressure led inconsistent needle valve settings prop un loaded air increased rpm richened mixture other hand can usually leave pen-bladder needle valve setting alone through set races Once get used bladder youll find engine starting easier will need third hand hold airplane since second will required hold fuel line pinched off until engine fires prime third hand usually takes form plane holder Cardboard boxes sides cut have worked fine also will hold just about thing else youll need Props may greatest poten tial performance improvement exists Until recently 5 x 4 Cox grey props cut down thinned favorites problems prop because takes lot time perform necessary reworks however reworks consistent break slightest impact have engine competitive prop use Cox 5 X 4 black nylon happened upon prop looking good test prop diameter pitch right speed/rpm took few flights convince quit carving grey ones Although has mickey mouse look check grey pitch block youll find has about -in pitch likely performance comes Fortunately us lazy made softer nylon prevents effective reworking Racing have successfully staged two kinds racing Seattle area predominant type sponsored PROPS flown 3-pylon course 330 straights 80 between pylons 2 3 requires pylon judges communication system pilots may immediately notified cuts Callers flagmen allowed Pilots starter lap counter/timers stand between #2 #3 pylons start/finish line type racing similar Formula good deal simplification way go can put together com munication system dont have communication system would like try racing still simpler way go course flown around two pylons located approximately 300 350 feet apart far side normal field runway need five officials starter official pilot official stands pilot normal pilots box counts laps times calls cuts Cuts also called aircraft comes closer near side runway type racing can also expedited since everyone pits normal field pit area either case fly 10 laps flying start filying start race itself should try because way go flying start run follows race time minus two minutes June 1976 91 start engines signal given Launching models occurs random started fliers get up early can take few practice laps desire Time go announced regular intervals T minus 15 seconds models must launched air borne required proceed left first pylon downwind #2 #3 pylons youre air T-15 second mark no start no further engine running allowed ruling required pilots can hear 10-second countdown Normally everyone has gained con siderable amount altitude circling above course simultaneous dive starting line exciting race itself Occasionally fliers will chicken out fearing will cut passing start line before T-zero called out Loops other maneuvers may taken delay arrival line clocks start together T-zero other rules scoring conven tional nutshell airplane rules follows maximum engine displace ment 051 cu inches weight less 20 32 oz fuselage minimum cross section 85 sq inches minimum wing area 200 sq inches constant chord minimum thickness 7/ inch still requiring two func tional 125-in wheels way out new rule have added year requirement positive servo actuated engine cut-off done expedite running races since getting some pretty long engine runs after races over Its simple item mechanize using down elevator command squeeze fuel line go Well thing sure will go faster look race times drop below 120 before season over will always new clever design innova tions really need go some national standards event can use common yardstick meas ure progress perhaps compete national level case can always visit us during winter first Sunday month Boeing Kent field second Sun day month Delta Park field Portland Just before mailing article late Dec chance talk Dale Kim about availability needle valve assemblies TD parts piston-setting tools etc Clary Corp marketing Dale still recovering operation certain about personal involvement did say however good number needle valve assemblies distribution pipeline should available & L has several hundred according Dale still other parts inventory Clary Dale felt would also find way market further information becomes available Dale will glad let know can reach him 283 North Spruce Drive Anaheim CA 92805 See Ohio continued page 56 sonic bomber World War land II fighters plus three presidential planes museum open 9 5 Monday through Friday 10 6 Saturday Sunday oldest largest military aviation museum world addition 130 aircraft missiles aero nautical items spanning period Kitty Hawk present Admission free no pets permitted Photography encouraged mu seum although flash equipment will re quired interior pictures Free movies shown theater Satur days Sundays holidays gift shop operated Air Force Museum Foun dation sells aviation-oriented items profits used assist Air Force Mu seum Coffee Shop available re freshments limited picnic tables available during summer months sack lunches permitted museum building exhibits displays well identified permit touring guides Research facilities museum con sist selected documents photographs aircraft drawings related Air Force Museum program historical materials available research pur poses weekdays 9 am 4 pm documents may copied nomi nal fee Should family become saturated aeronautical pursuits numerous amusement parks offer varied entertain ment Kings Island off 1-71 just north Cincinnati contains 1600 fun-filled acres LeSourdsville Lake Amusement Park State Rt 4 off 1-75 south Middletown Ohio Cedar Point Lake Erie near Sandusky Ohio offers rides wild animal acts 3-D wrap-around motion pictures Sea World Rt 43 off Ohio Turnpike Exit 13 provides aqua tic exhibits shows sorts Theres something everyone near 1976 Nats sites further information may write Office Travel & Tourism Box 1001 Columbus Ohio 43216 Springfield Area Chamber Commerce 102 East Main Street Springfield Ohio 45501 Dayton Development Council 1940 Win ters Bank Tower Dayton Ohio 45402 R E Baughman Information Officer Air Force Museum Wright Patterson AFB Ohio 45433 92 Model Aviation QuickSilver continued Shark CO2 Engine Suitable Peanut Scale up 24 span runs up full power 45 sec. ad justable low power runs up 5 mm CO2 bulb charges engine tank 6 10 times Nylon crankcase cylinder piston fuel tank prop charging gun price $1995 PoIka ModelCraft Hobbiec 314 Fifth Ave. New York NY 10001 productreviewproducteviewprOduClrOVieWPtOdUCtreVieW