Scale Bob Dolly Wischer MEASUREMENTS letter read er Finland asks elaboration methods taking measurements fullscale airplanes have past columns expounded virtues having pro totype available examination photos dimensional data neglected explain procedures made incor rect assumption everyone knew necessary steps Juhani Sederholm asks specifically method determining exactly shape unknown airfoil damaging surface air plane after permission granted make dimensional checks airfoil designation known its outlines can copied standard reference source such Handbook Airfoil Sec tions MS Rice Most important approach airplane prepared few items equipment addition usual 100-foot steel tape measure Make giant wooden sliding caliper can clamped tightly light pressure avoid damage wings leading trailing edges beam member caliper graduated inch marks along its length measure beam down wing surface graduated positions gives us dimensional profile airfoils upper surface caliper clamped similar manner wings lower surface process repeated same slid ing caliper can used determine measure airfoil shape fin stabilizer caliper fabricated wood sufficiently strong will sag its own weight should also quite light avoid heavy clamping pres sure could leave dents surfaces average wing chord wood beam member could have cross section x 1 end-bracket fixed beam notched fit leading edge radius second bracket also notched trailing edge slides along beam held place thumb screw will remain posi tion wing measurements being made Using same beam member add ing longer leg brackets caliper can used measure fuselage width depth 46 Model Aviation ii RETC BEA BE t ANGL youre going build Scale model based specific prototype planeand youre going measure prototype get dimensions make pianshere some suggestions easily accurately knows Roger Brennom ioves Northrop P61 Black Widowhes built several RC Scale models Heres latest 96ln wingspan 25ib wetght two OS 90 engines Construction foam Retracts electric Finish Hobbypoxy over poiyesterlepoxy especially handy fuselage cross section odd oval shape caliper can also used obtain dimen sions odd shapes such aft end engine cowl neither round nor oval Long strips paper similar tape used adding machines can wrapped around fuselage cowl held place bits self-stick tape known fixed point side fuselage panel line example use felt tip pen mark tape regular increments above below point Now caliper can adjusted measure fuselage width intermediate points ascertain odd-shaped cross Continued page 119 its hard capture beauty black model film assure Keith Shaws OH 85 Comet L fantastic 1I6scaie version EngiandtoAustralia Mac Robertson Black Magic entry Model spens 88 weighs 120 ozhaif its Electric power system Motors Keller 2511 2s won Best MonoKote award Toledo hadnt fellow stand ing background would hard believe Vuitee BT13 Vibrator really model Rl 115-scale spans 1008 wel ha 7 lb Power isa Quadra 50 Pat Massey took 19 months build addsd functional landing gear shock struts landing lights sliding canopy panel lines rivets Finish K&B resin over 6oz fiberglass cloth WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30 BALSA STICKS 36 48 1/162331/lOx1/400 3/32x2AS1i16c3/810 1/8 x2A31/lOx1/214 3/162483/321/410 1/4 x2083/32x3/812 1/323373/321/210 l/20x3371/Ox1/608 l/16x33748311/Ox1/41116 3/3234450371/Ox3/01218 1/6 x35471451/Ox1/21824 3/16x36282663/16x3/1O1116 1/4 x37395613/Ifix3/617 6/16x3853/161/22230 3/8 x368124711/4x1/41624 1/2 x31101561/4X081026 3/4 x31651/4X1/22130 1/16x46876461/4x3/43444 3/32x4JO94561/4x140 I/O x400106665/16x5/102128 3/16 x 493122783/0 x3/02737 1/4 x4110134843/Ox1/23246 3/6 x 41662253/Ox3/4A255 1/2 x42262613/Ox152 12x1/23653 MATCHEDSHEETS421/2 x3/44662 3/3241041/2x158 1/0x41085/Ox5/040 316x41203/4x3/467 14x4131 BALSA HOT LINE Call 806 745 6394 10am -6pm Central Time LIGHT 4-6 LB BALSA TRIANGLES 36WOOD36 1/4x1/425132x349 3/83/8301/203AS 1/21/2341/16x349 3/43/4453/32356 1x 1551/0x367 3/16x376 BALSA PLANKS361/4x305 11053/8x3115 121501/2x3139 132003/43220 142041x3300 1 1/232751/10470 1 1/243603/32491 222251/84100 2x33253764117 244351/4x4130 334953/84207 3460012x4202 TAPERED SHEETS36 1/4205TRAILING EDGE36 1/43851/4132 3/0x2665/16 11/439 3/03903/Ox 11/746 1/2312012270 LONE STAR EPOXY 9,Lxx-O 95 Sm,590 15 mIx690 30 mix590 INSTANTGLUE 1 xx Thick298 1 cc Thix296 2 cc Thick550 2 cx Thix550 SASS WODD48 3/1831626 3/161/430 3/10 3O38 3/101/246 3/163460 1/4x1/442 1/43/049 1/43/480 3/83/060 3/81/270 3/8x3490 1/21290 1/23/4100 BUNDLE DEALS 20-1/6334005 201/164361020 203/3233904E 15-3/32436955 151/0336715 10-1/8436675 15-3/16336900 103/16436810 1014336630 10-1/4x4x36090 103/8336850 53/Ox 430025 5-1/2336540 5-1/2436855 10-3/32448845 5-18440485 5-3/16x 440586 5-1/4x 446625 181/013171/43/0 10x1/416233/63/6 1/83/020273/81/2 316x3/101724 I3/03/4 3163823321/23/4 3/16x123040 1/4 lA2627 lAx3/82042 1/41/23447 3/Ox 3/83782 SPRUCE STICKS 36 48 1/8 1/815 18 141024 1/0 3/02029 3/163/102534 14 1/43145 14 3/83660 38 3/04563 38 125570 1/2 1/26080 1/2 3/46080 SPRUCE TRIANGLES 36 3/83/840 1/21/261 3/43/477 18 40 45 50 50 68 BIRCH DO WELS36 1009 3/1611 1/414 5/1626 3/032 3PLVBIRCH48 1/64x12526 1/3212425 1/1612435 1/8x12450 SPLYSIRCH48 3/3212570 1/012505 016125-OS 1/412600 GROOVED LG MOUNTS 13 IncheS LITE PL V483/Ox 3/4/1/8/40 1801603/83/415/32/40 LONE STAR MODELSHandling charge$300 pay UPS Add $200 COD $300 extra PP 1/23/43/16/45 APO FPO 1623 57th St Lubbock TX 79412,~ flflfl 100 .,.I, NA;.,fldo.-51000 1/812 300 September 1985 47 polished aluminum floats fuselage nose Orest Drobeys Beilanca Aircruiser attracted lots attention Toledo floate foam cores balsa aluminum cover Open structure covered MonoKote Craft spans 65% weighs 7 lb has OS Wankel engine built 1112 scale Fabulous itCUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa PINESTICKS 36 48HARD MAPLE span flaperons Wingspan just under three meters Access ballast com partment through spoiler bays change wing tip access used earlier design flew York fourth World Champs Dave Dyer still uses wing tip method providing access port ballast ing wing contains full-span tubes end parting line wing tip tip removed slugs ballast slid down wing root area via tubes ballast secured pre vented shifting toward tips filling voids varying lengths depending amount ballastof balsa dowels tip plugs place joint taped over system does have some drawbacks tapered wing wing tip thickness could determine maximum tube diam eter thereby restricting size dimension somewhat less what could used near root Dave design overcomes because Quabeck airfoil sections uses run thicknesses 85% root 100% tip thereby compensating somewhat chord taper hollow tubes also present some what non-standard building situation whether construction includes foam core built-up type couple photos month also clude some contrasts hardware design Observe two Stephan Smith/Australia displays guys down under design winchesmake all-terrain winches cart carries battery also complete winch toolbox turnaround fitted pneumatic tires Looks like ideal design shorthanded teamor team member winch itself secured frame high off ground order towline clear ground much possible turnaround pulley also staked high off ground order minimize line wear during winching retrieving operations motor Lucas M50 designed truck starter motor other picture winch shows Hi Im John Tatone let know am no longer affiliated TATONE PRODUCTS Corp will now manufacturing model engine accessories under new name JOHN TATONE COMPANY Items produced will similar have designed invented developed since 1956 now have available new generation Four Cycle engine mounts completely redesigned tailored specifically various engines mounts drilled tapped now fit engines perfectly Also two redesigned cast aluminum Engine Test Stands 1/2A 60 GIANT size engines 25 Wttnh fnr fur new nf incnwl mufflers German design motor Bosch product used starter Mercedes Benz 300 diesel Besides winchs simple straightforward design note line drum proportions fact 400 meters line already drum Its about two inches diameter about eight inches wide Compare Australian line drum about four inches wide six inches diameter advan tages German design smooth rapid accelerations during zoom part launch turnaround designs differed number teams competed Australia photos Xavier Heriard France compares French teams gimbal-mounted pulley American design French design allows pulley incline freely direction during launch Gary Ittner USA says know launch straight ahead can use shows off simplebut smoothversion used Mike Bame Mike Reagan As auto racing other high-tech sport some high-strung research makes life bit easier us downstream action same can said F3B its relation ship other types Soaring Well pass ideas future columns Good lift Dan Pruss 131 E Pennington Ln Plainfield IL 60S44 RC Scale/Wischers Continued page 47 section coordinates Obviously re quires help assistant two guiding calipers ends equally both sides fuselage graduations need used measurement After caliper has lifted fuselage merely measure across gap bracket tips read dimension directly carry short step ladders reach upper portions fuselage caliper clamped wing near its root cord can laid along beams upper surface stretched rearWE GIVE YOU CHOICE SCRATCH BUILD KIT BUILD OR SOMEWHERE IN-BETWEEN SCRATCH-A-PLANE offers finest engineered plans available complete fuil size tempiates part finest formed cowls canopies wheeipants heaviest practkai gauge ABS Butyrates now offers T-6 aluminum ianding gears prebent music wire landing gears cabanes v-struts plus complete wood paks AAA quality Balsa Aircraft grade & Lite-Piy Alaskan Sitka Spruce Apply templates supplied plan pak balsa plywood spend few hours cutting out parts hobby band saw construct finest flying easiest building kit youve ever owned K Rose offers 4 stroke performance dream about its optional flaps swept wing offers thrills experienced pilot yet docile enough trainer tVW 35 SCALE GLASAIR WING SPAN 80 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL CANOPY & WHEELPANTS $4495 CALL OR WRITE FOR COMPLETE LISTINGS AND PRICES OF DESIGNS AND ACCESSORIES SEE YOUR HOBBY SHOP OR ORDER DIRECT SHIPPING CHARGE S300 COD ORDERS ACCEPTED VISA & MASTERCHARGE WELCOME SCRATCH-A-PLANE 2060 ATHENS AVE REDOING CA 96004 916 241-4190 IF YOU CAN BUILD KIT YOU CAN BUILD SCRATCH-A-PLANE September 1985 119 NEW ITEMS AVAILABLE AT MOST HOBBY SHOPS IF NOT CONVENIENT ORDER DIRECT SEND SASE FOR FURTHER INFORMATION t4W 1/4 SCALE SHINGLETOWN ROSE WING SPAN 84 ENG 124 STROKE ROLLED PLAN PAK $2495 COWL FENDERS & WINDSHIELDS $3995 1/4 SCALE FOKKER DR-i WING SPAN 70 1/2 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL $1195 inEmEThe hinge allows control D tMIMU surface removal tools PATENTlost pins problems fr PENDINGcovering painting repair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots No Pins Rotate 900 14-6 $335 3#8I6.# $445 1 26 d $495 ward stabilizer determine angular difference between wing stabilizer incidence angles cord also indicates angle wing incidence relative fuselage centerline stabilizer adjustable type make certain measurements made center its adjustment range Measuring along curved surfaces can bit tricky tape measure stretched along fuselage side ftom rear propeller tail post following curve resulting measurement will distorted too long Avoid false reading measuring first prop point fuselage choosing vertical line such engine cowl edge door measure line elevator hinge line stretching tape parallel fuselage center dimension elevator hinge tail post added obtain true fuselage length would diawn paper side view Actually long dimen sion along curved fuselage surface can used during model design con struction cross-check find length shown top view difference -scale model can much inch two airplane wide fuselage Building model prototype benefit three-view drawing prepared known reliable source can quite time-consuming have done past find several days can spent taking dimensions making photos During process placing lines paper later time invariably number gaps remaining missing information Secondor thirdtrips airport museum normal Photos good reminders shapes usually minimum value dimensions because distortion photo process airplane out doors camera can great distance airplane long tele photo lens can used produce rela tively distortion-free photos some assistance making working draw ings model building standard 35mm SLR camera lens should have focal length 135mm greater exposures made lens aimed squarely right angles fuselage side front top view nearly impossible camera really no substitute tape measure time spent gathering data Taking dimensions full-size air craft always done datum lines points Length dimensions fuselage made propellers rear surface prominent vertical line chosen convenience Dimensions features made measuring fore aft line Critical dimensions wing leading edge spar landing gear wheel centers Tapered wings can troublesome particularly no parallel lines leading edge trailing edge straight-through main wing spar delineated presence rivet rows external surfaces cord stretched tween tips will establish arbitrary line measure stretched cord along top longeron along prominent panel line will aid locating relationship between fuselage centerline propeller shaft Shaft loca tion thrust offsets difficult locate accurately elements can have profound effect flight well appearance Scale models Ex tend stretched cord forward plane propellers rotation measure distance floor Meas ure distance prop shaft cen terline floor difference between two dimensions can placed accurately models con struction drawings Most measurements full-scale air craft straightforward use steel tape always starting fixed reference points lines job can proceed quickly once basics begun sketch pad pencil using freehand technique will provide record later transposed accurate drawings freehand sketches can very crude rudimentary no need repro duce true shape part freehand stage dimensions 120 Model Aviation jj17j1ASSOCIATESINC OFEST CLOUD WAY ATO CA 94545 780-4868 OTIS SOLD MT SO Fokker TnDiane 4 Flight TestedContest Proven RhInebeck 84 Results CamelFirst lanosSecond Scale 2 gine 60 Send 51001w latest prIce list lIterature VK MODEL AIRCRAFT CO 5866 Transit Rd Depew NY 14043 716 684-5555 jiImm~ Hosted Indian City Radio Control Club 0 Raffle Ready Fly GPM 540 CAP- 21 Less Radio BY Great Planes Model Mt g Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K nufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show BenjamIn F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES e BOATS S CARS S PLASTICS Auction C Refreshments e Free Parking Luedeman - 25505 Chernick Taylor Michigan 481~ Phone 31 3 295-0569 carry real importance Always look straight lines air craft structure Except nose cowlings tip outlines often surprising few curves found airplanes have seen three-view drawings showing curves fuselage outlines reali ty should have succession straight lines joined end end key feature sheet metal fuselages older airplanes aluminum formed direction few compound curves require costly tooling hand-working metal course exceptions Spit fire its curves comes mind modern aircraft also have extensive tooling complex shapes older types look straight lines curves exist often represent wooden string ers wood-former superstructure New publication specialty journal interest Scale modelers being launched 19 19-1939 Air Wars will carry information detailing aircraft perfor mance armament combat handling pilot reports wars between 1919 1939 will feature activities restorers replica-builders Scale modelers historians museums Issue No 1 includes articles 1936 Legion Condor Spain Waco military aircraft Fiat CR 32 Heinkel HE-S IA-l draw ings quarterly publication Write Air Wars 8931 Kittyhawk Ave Los Angeles CA 90045 Composites Greatest strength weight other exotic materials such Kevlar carbon fiber can dervied proper use commonly Used materials balsa plywood fiber Ilass past 10 years almost plywood models has lami nated two layers plywood ply plus balsa chief advantage other strength absence warping seems continual fault plywood use white glue very thin film tween layers sheet compressed between flat boards C-clamps Mini mum drying setting time warm condi tions hour after pressure can released part cut shape absolutely certain no later warping increase curing time eight hours Examples recent applications single bow frame canopy-support made 3 layers A2-in ply part cut sheet very narrow rim about A6-in square section 9-in wide has tremendous strength model should nose over tall grass negligible risk frac ture will easily support planes weight Fuselage bulkheads made laminating process two layers A-in %2-in ply can thinned out very narrow frame would equal weight ordinary balsa formersbut enormous strength comparison Laminating three layers two plywood balsa core affords light weight added rigidity resulting part has advantage greater thickness SAILPLANES WORLD iSOIA Cotfee Rd Modesto CA 95355 cementing surface fuselage bulkheads soft A-in balsa A-in ply faces ideal combina tion can used weight reduction structures large models process may seem wasteful because bulkhead center cut out scraps can used smaller parts fuselage aft end leftovers always used ever new lamination needed search through scrap box often waste time scraps long since absorbed another application External composites old standby fiberglass cloth laminated over balsa probably common combination Its weakness compression strength Air loads wing stabilizer will likely never great enough cause damage shock hard landing can cause compression fractures bottom sur faces Subsequent suddenly-applied loads due snap maneuvers change direc tion high speed could lead failure Once continuity glass fibers has lost no quick easy repair Using epoxy resin place polyester will increase strength 15% 20% Continued page 124 Sailplanes International Krause MultiPlex Wan itschek Wik & Roke Sport-Scale-F3B European Hardware Accessories Send $500 Cat & Price List 209 577-0506 September 1985 121 DODGSON DESIGNS WINDSONG CHOICE OF CHAMPIONS the top thermal contest flyers over country turining Windsong top competition glider answer simple want win Meet Bernie Coleman Charlotte NC Windsong Pictured trophies Bernies winning 1st place overall high score third annual SHM Contest Winston-Salem N C May 11th 12th 1985 May 25th 26th 1985 Bernie won 2-meter K- ow predecessor Pixy 5th Open Class Rebel C C Rally Windsong John Gunsallus won first overall Ed Berton won 4th Windsongs Jacksonville FL Jake Watkins won 1985 NW NSS regional contest both open class overall high score flying windsong Dave Johnson won dard class Camano Dodgson Designs planes finished 1st C through 8th class want win sten Champions song 19995Cauiano 15995Pixy 14995 2 stamps catalog $25 VHS video tape I SW CAMANO DRIVE CAMANO ISLAND WA 9829 RC Scale/Wischers Continued page 121 thicker balsa sheeting /32 in place A6 will provide additional safety fac tor though weakness exists fiberglass cloth remains best method building-in strength com posite construction because large area covered flight surfaces point discussion shouldnt feel fiberglass makes wing stabilizer invulnerable damage After hard landing look compres sion fracture across wing strength impaired cutouts retract able landing gear stabilizers lower surface line attached fuselage likely point fracture Obviously same points vulnera ble airplanes covered fiber glass cloth Airplanes come apart midair have seen number heard others probably history bad-landing damage before catastrophe Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 responding advertisers mention read about Model Aviation RC Aerobatics/Van Putte Continued page 49 US team likely have airplanes like Laser 200 Frackowiaks Challenger II Chidgeys Tar Baby Circus Hobbies Stevens Akromaster other large slow airplanes powered fourcycle 120 engines problem Well could problem US team Lets suppose am foreign judge used seeing fast groovy airplanes perform Turn around pattern am judge World Championships would judge US team entries rule book says maneuver graded 'smoothness gracefulness' slow four-cycle-powered airplanes will look smooth graceful two-cycle-powered cousins US team could really get clobbered foreign judges saving feature US team entries will will able stay box much easi ly two-cycle-engine powered en tries make up some ground keeping maneuvers plane height will allow seen clearly judges approximately 60 vertically 1200 horizontally will interesting World Championships Doug Dahlke Oshkosh WI calls EAA-ville wrote help out think letter part said few quick comments column June 1985 First comments about ukie conversions RC R VP sounds like talking about CL stuff 20 years ago may intent sug gested . horizontal tail area 20% 25% wing area.. will turn page 70 June 1985 issue Ted Fanchers column will see .the area stab elevator should normally between 20% 25% wing area has pret ty much standard decade ukie Stunt ships True elevator should reduced RC Also clear trend towards longer aft movement arms CL Stunters Perhaps quite full 3 3 times suggest newer stuff much better respect Well what can say Perhaps can hedge saying first powered air plane RC deBolt Kitten flew 1954I never flew CL airplane life way whats ukie Just kidding meantime may landings wheels down Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 124 Modei Aviation DUDGSON DESIGNS 2904 read about Model Aviation writing advertisers mention QUARTERSCALE SPAN 89 SCALE PLANS & NOTES $ 2995 PARTIAL KIT & PLANS $12500 BUILT UP TO ROUGH IT $50000 OS 61 8500 $11500 PIPER Thi-PACER PA-22 PAN SCALE 5 DH-85 LEOPARD MOTHE SPAN SCALE 5 642-84651 DH-8O russ MOThE SPAN SCALE 5
Edition: Model Aviation - 1985/09
Page Numbers: 46, 47, 119, 120, 121, 124
Scale Bob Dolly Wischer MEASUREMENTS letter read er Finland asks elaboration methods taking measurements fullscale airplanes have past columns expounded virtues having pro totype available examination photos dimensional data neglected explain procedures made incor rect assumption everyone knew necessary steps Juhani Sederholm asks specifically method determining exactly shape unknown airfoil damaging surface air plane after permission granted make dimensional checks airfoil designation known its outlines can copied standard reference source such Handbook Airfoil Sec tions MS Rice Most important approach airplane prepared few items equipment addition usual 100-foot steel tape measure Make giant wooden sliding caliper can clamped tightly light pressure avoid damage wings leading trailing edges beam member caliper graduated inch marks along its length measure beam down wing surface graduated positions gives us dimensional profile airfoils upper surface caliper clamped similar manner wings lower surface process repeated same slid ing caliper can used determine measure airfoil shape fin stabilizer caliper fabricated wood sufficiently strong will sag its own weight should also quite light avoid heavy clamping pres sure could leave dents surfaces average wing chord wood beam member could have cross section x 1 end-bracket fixed beam notched fit leading edge radius second bracket also notched trailing edge slides along beam held place thumb screw will remain posi tion wing measurements being made Using same beam member add ing longer leg brackets caliper can used measure fuselage width depth 46 Model Aviation ii RETC BEA BE t ANGL youre going build Scale model based specific prototype planeand youre going measure prototype get dimensions make pianshere some suggestions easily accurately knows Roger Brennom ioves Northrop P61 Black Widowhes built several RC Scale models Heres latest 96ln wingspan 25ib wetght two OS 90 engines Construction foam Retracts electric Finish Hobbypoxy over poiyesterlepoxy especially handy fuselage cross section odd oval shape caliper can also used obtain dimen sions odd shapes such aft end engine cowl neither round nor oval Long strips paper similar tape used adding machines can wrapped around fuselage cowl held place bits self-stick tape known fixed point side fuselage panel line example use felt tip pen mark tape regular increments above below point Now caliper can adjusted measure fuselage width intermediate points ascertain odd-shaped cross Continued page 119 its hard capture beauty black model film assure Keith Shaws OH 85 Comet L fantastic 1I6scaie version EngiandtoAustralia Mac Robertson Black Magic entry Model spens 88 weighs 120 ozhaif its Electric power system Motors Keller 2511 2s won Best MonoKote award Toledo hadnt fellow stand ing background would hard believe Vuitee BT13 Vibrator really model Rl 115-scale spans 1008 wel ha 7 lb Power isa Quadra 50 Pat Massey took 19 months build addsd functional landing gear shock struts landing lights sliding canopy panel lines rivets Finish K&B resin over 6oz fiberglass cloth WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30 BALSA STICKS 36 48 1/162331/lOx1/400 3/32x2AS1i16c3/810 1/8 x2A31/lOx1/214 3/162483/321/410 1/4 x2083/32x3/812 1/323373/321/210 l/20x3371/Ox1/608 l/16x33748311/Ox1/41116 3/3234450371/Ox3/01218 1/6 x35471451/Ox1/21824 3/16x36282663/16x3/1O1116 1/4 x37395613/Ifix3/617 6/16x3853/161/22230 3/8 x368124711/4x1/41624 1/2 x31101561/4X081026 3/4 x31651/4X1/22130 1/16x46876461/4x3/43444 3/32x4JO94561/4x140 I/O x400106665/16x5/102128 3/16 x 493122783/0 x3/02737 1/4 x4110134843/Ox1/23246 3/6 x 41662253/Ox3/4A255 1/2 x42262613/Ox152 12x1/23653 MATCHEDSHEETS421/2 x3/44662 3/3241041/2x158 1/0x41085/Ox5/040 316x41203/4x3/467 14x4131 BALSA HOT LINE Call 806 745 6394 10am -6pm Central Time LIGHT 4-6 LB BALSA TRIANGLES 36WOOD36 1/4x1/425132x349 3/83/8301/203AS 1/21/2341/16x349 3/43/4453/32356 1x 1551/0x367 3/16x376 BALSA PLANKS361/4x305 11053/8x3115 121501/2x3139 132003/43220 142041x3300 1 1/232751/10470 1 1/243603/32491 222251/84100 2x33253764117 244351/4x4130 334953/84207 3460012x4202 TAPERED SHEETS36 1/4205TRAILING EDGE36 1/43851/4132 3/0x2665/16 11/439 3/03903/Ox 11/746 1/2312012270 LONE STAR EPOXY 9,Lxx-O 95 Sm,590 15 mIx690 30 mix590 INSTANTGLUE 1 xx Thick298 1 cc Thix296 2 cc Thick550 2 cx Thix550 SASS WODD48 3/1831626 3/161/430 3/10 3O38 3/101/246 3/163460 1/4x1/442 1/43/049 1/43/480 3/83/060 3/81/270 3/8x3490 1/21290 1/23/4100 BUNDLE DEALS 20-1/6334005 201/164361020 203/3233904E 15-3/32436955 151/0336715 10-1/8436675 15-3/16336900 103/16436810 1014336630 10-1/4x4x36090 103/8336850 53/Ox 430025 5-1/2336540 5-1/2436855 10-3/32448845 5-18440485 5-3/16x 440586 5-1/4x 446625 181/013171/43/0 10x1/416233/63/6 1/83/020273/81/2 316x3/101724 I3/03/4 3163823321/23/4 3/16x123040 1/4 lA2627 lAx3/82042 1/41/23447 3/Ox 3/83782 SPRUCE STICKS 36 48 1/8 1/815 18 141024 1/0 3/02029 3/163/102534 14 1/43145 14 3/83660 38 3/04563 38 125570 1/2 1/26080 1/2 3/46080 SPRUCE TRIANGLES 36 3/83/840 1/21/261 3/43/477 18 40 45 50 50 68 BIRCH DO WELS36 1009 3/1611 1/414 5/1626 3/032 3PLVBIRCH48 1/64x12526 1/3212425 1/1612435 1/8x12450 SPLYSIRCH48 3/3212570 1/012505 016125-OS 1/412600 GROOVED LG MOUNTS 13 IncheS LITE PL V483/Ox 3/4/1/8/40 1801603/83/415/32/40 LONE STAR MODELSHandling charge$300 pay UPS Add $200 COD $300 extra PP 1/23/43/16/45 APO FPO 1623 57th St Lubbock TX 79412,~ flflfl 100 .,.I, NA;.,fldo.-51000 1/812 300 September 1985 47 polished aluminum floats fuselage nose Orest Drobeys Beilanca Aircruiser attracted lots attention Toledo floate foam cores balsa aluminum cover Open structure covered MonoKote Craft spans 65% weighs 7 lb has OS Wankel engine built 1112 scale Fabulous itCUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa PINESTICKS 36 48HARD MAPLE span flaperons Wingspan just under three meters Access ballast com partment through spoiler bays change wing tip access used earlier design flew York fourth World Champs Dave Dyer still uses wing tip method providing access port ballast ing wing contains full-span tubes end parting line wing tip tip removed slugs ballast slid down wing root area via tubes ballast secured pre vented shifting toward tips filling voids varying lengths depending amount ballastof balsa dowels tip plugs place joint taped over system does have some drawbacks tapered wing wing tip thickness could determine maximum tube diam eter thereby restricting size dimension somewhat less what could used near root Dave design overcomes because Quabeck airfoil sections uses run thicknesses 85% root 100% tip thereby compensating somewhat chord taper hollow tubes also present some what non-standard building situation whether construction includes foam core built-up type couple photos month also clude some contrasts hardware design Observe two Stephan Smith/Australia displays guys down under design winchesmake all-terrain winches cart carries battery also complete winch toolbox turnaround fitted pneumatic tires Looks like ideal design shorthanded teamor team member winch itself secured frame high off ground order towline clear ground much possible turnaround pulley also staked high off ground order minimize line wear during winching retrieving operations motor Lucas M50 designed truck starter motor other picture winch shows Hi Im John Tatone let know am no longer affiliated TATONE PRODUCTS Corp will now manufacturing model engine accessories under new name JOHN TATONE COMPANY Items produced will similar have designed invented developed since 1956 now have available new generation Four Cycle engine mounts completely redesigned tailored specifically various engines mounts drilled tapped now fit engines perfectly Also two redesigned cast aluminum Engine Test Stands 1/2A 60 GIANT size engines 25 Wttnh fnr fur new nf incnwl mufflers German design motor Bosch product used starter Mercedes Benz 300 diesel Besides winchs simple straightforward design note line drum proportions fact 400 meters line already drum Its about two inches diameter about eight inches wide Compare Australian line drum about four inches wide six inches diameter advan tages German design smooth rapid accelerations during zoom part launch turnaround designs differed number teams competed Australia photos Xavier Heriard France compares French teams gimbal-mounted pulley American design French design allows pulley incline freely direction during launch Gary Ittner USA says know launch straight ahead can use shows off simplebut smoothversion used Mike Bame Mike Reagan As auto racing other high-tech sport some high-strung research makes life bit easier us downstream action same can said F3B its relation ship other types Soaring Well pass ideas future columns Good lift Dan Pruss 131 E Pennington Ln Plainfield IL 60S44 RC Scale/Wischers Continued page 47 section coordinates Obviously re quires help assistant two guiding calipers ends equally both sides fuselage graduations need used measurement After caliper has lifted fuselage merely measure across gap bracket tips read dimension directly carry short step ladders reach upper portions fuselage caliper clamped wing near its root cord can laid along beams upper surface stretched rearWE GIVE YOU CHOICE SCRATCH BUILD KIT BUILD OR SOMEWHERE IN-BETWEEN SCRATCH-A-PLANE offers finest engineered plans available complete fuil size tempiates part finest formed cowls canopies wheeipants heaviest practkai gauge ABS Butyrates now offers T-6 aluminum ianding gears prebent music wire landing gears cabanes v-struts plus complete wood paks AAA quality Balsa Aircraft grade & Lite-Piy Alaskan Sitka Spruce Apply templates supplied plan pak balsa plywood spend few hours cutting out parts hobby band saw construct finest flying easiest building kit youve ever owned K Rose offers 4 stroke performance dream about its optional flaps swept wing offers thrills experienced pilot yet docile enough trainer tVW 35 SCALE GLASAIR WING SPAN 80 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL CANOPY & WHEELPANTS $4495 CALL OR WRITE FOR COMPLETE LISTINGS AND PRICES OF DESIGNS AND ACCESSORIES SEE YOUR HOBBY SHOP OR ORDER DIRECT SHIPPING CHARGE S300 COD ORDERS ACCEPTED VISA & MASTERCHARGE WELCOME SCRATCH-A-PLANE 2060 ATHENS AVE REDOING CA 96004 916 241-4190 IF YOU CAN BUILD KIT YOU CAN BUILD SCRATCH-A-PLANE September 1985 119 NEW ITEMS AVAILABLE AT MOST HOBBY SHOPS IF NOT CONVENIENT ORDER DIRECT SEND SASE FOR FURTHER INFORMATION t4W 1/4 SCALE SHINGLETOWN ROSE WING SPAN 84 ENG 124 STROKE ROLLED PLAN PAK $2495 COWL FENDERS & WINDSHIELDS $3995 1/4 SCALE FOKKER DR-i WING SPAN 70 1/2 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL $1195 inEmEThe hinge allows control D tMIMU surface removal tools PATENTlost pins problems fr PENDINGcovering painting repair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots No Pins Rotate 900 14-6 $335 3#8I6.# $445 1 26 d $495 ward stabilizer determine angular difference between wing stabilizer incidence angles cord also indicates angle wing incidence relative fuselage centerline stabilizer adjustable type make certain measurements made center its adjustment range Measuring along curved surfaces can bit tricky tape measure stretched along fuselage side ftom rear propeller tail post following curve resulting measurement will distorted too long Avoid false reading measuring first prop point fuselage choosing vertical line such engine cowl edge door measure line elevator hinge line stretching tape parallel fuselage center dimension elevator hinge tail post added obtain true fuselage length would diawn paper side view Actually long dimen sion along curved fuselage surface can used during model design con struction cross-check find length shown top view difference -scale model can much inch two airplane wide fuselage Building model prototype benefit three-view drawing prepared known reliable source can quite time-consuming have done past find several days can spent taking dimensions making photos During process placing lines paper later time invariably number gaps remaining missing information Secondor thirdtrips airport museum normal Photos good reminders shapes usually minimum value dimensions because distortion photo process airplane out doors camera can great distance airplane long tele photo lens can used produce rela tively distortion-free photos some assistance making working draw ings model building standard 35mm SLR camera lens should have focal length 135mm greater exposures made lens aimed squarely right angles fuselage side front top view nearly impossible camera really no substitute tape measure time spent gathering data Taking dimensions full-size air craft always done datum lines points Length dimensions fuselage made propellers rear surface prominent vertical line chosen convenience Dimensions features made measuring fore aft line Critical dimensions wing leading edge spar landing gear wheel centers Tapered wings can troublesome particularly no parallel lines leading edge trailing edge straight-through main wing spar delineated presence rivet rows external surfaces cord stretched tween tips will establish arbitrary line measure stretched cord along top longeron along prominent panel line will aid locating relationship between fuselage centerline propeller shaft Shaft loca tion thrust offsets difficult locate accurately elements can have profound effect flight well appearance Scale models Ex tend stretched cord forward plane propellers rotation measure distance floor Meas ure distance prop shaft cen terline floor difference between two dimensions can placed accurately models con struction drawings Most measurements full-scale air craft straightforward use steel tape always starting fixed reference points lines job can proceed quickly once basics begun sketch pad pencil using freehand technique will provide record later transposed accurate drawings freehand sketches can very crude rudimentary no need repro duce true shape part freehand stage dimensions 120 Model Aviation jj17j1ASSOCIATESINC OFEST CLOUD WAY ATO CA 94545 780-4868 OTIS SOLD MT SO Fokker TnDiane 4 Flight TestedContest Proven RhInebeck 84 Results CamelFirst lanosSecond Scale 2 gine 60 Send 51001w latest prIce list lIterature VK MODEL AIRCRAFT CO 5866 Transit Rd Depew NY 14043 716 684-5555 jiImm~ Hosted Indian City Radio Control Club 0 Raffle Ready Fly GPM 540 CAP- 21 Less Radio BY Great Planes Model Mt g Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K nufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show BenjamIn F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES e BOATS S CARS S PLASTICS Auction C Refreshments e Free Parking Luedeman - 25505 Chernick Taylor Michigan 481~ Phone 31 3 295-0569 carry real importance Always look straight lines air craft structure Except nose cowlings tip outlines often surprising few curves found airplanes have seen three-view drawings showing curves fuselage outlines reali ty should have succession straight lines joined end end key feature sheet metal fuselages older airplanes aluminum formed direction few compound curves require costly tooling hand-working metal course exceptions Spit fire its curves comes mind modern aircraft also have extensive tooling complex shapes older types look straight lines curves exist often represent wooden string ers wood-former superstructure New publication specialty journal interest Scale modelers being launched 19 19-1939 Air Wars will carry information detailing aircraft perfor mance armament combat handling pilot reports wars between 1919 1939 will feature activities restorers replica-builders Scale modelers historians museums Issue No 1 includes articles 1936 Legion Condor Spain Waco military aircraft Fiat CR 32 Heinkel HE-S IA-l draw ings quarterly publication Write Air Wars 8931 Kittyhawk Ave Los Angeles CA 90045 Composites Greatest strength weight other exotic materials such Kevlar carbon fiber can dervied proper use commonly Used materials balsa plywood fiber Ilass past 10 years almost plywood models has lami nated two layers plywood ply plus balsa chief advantage other strength absence warping seems continual fault plywood use white glue very thin film tween layers sheet compressed between flat boards C-clamps Mini mum drying setting time warm condi tions hour after pressure can released part cut shape absolutely certain no later warping increase curing time eight hours Examples recent applications single bow frame canopy-support made 3 layers A2-in ply part cut sheet very narrow rim about A6-in square section 9-in wide has tremendous strength model should nose over tall grass negligible risk frac ture will easily support planes weight Fuselage bulkheads made laminating process two layers A-in %2-in ply can thinned out very narrow frame would equal weight ordinary balsa formersbut enormous strength comparison Laminating three layers two plywood balsa core affords light weight added rigidity resulting part has advantage greater thickness SAILPLANES WORLD iSOIA Cotfee Rd Modesto CA 95355 cementing surface fuselage bulkheads soft A-in balsa A-in ply faces ideal combina tion can used weight reduction structures large models process may seem wasteful because bulkhead center cut out scraps can used smaller parts fuselage aft end leftovers always used ever new lamination needed search through scrap box often waste time scraps long since absorbed another application External composites old standby fiberglass cloth laminated over balsa probably common combination Its weakness compression strength Air loads wing stabilizer will likely never great enough cause damage shock hard landing can cause compression fractures bottom sur faces Subsequent suddenly-applied loads due snap maneuvers change direc tion high speed could lead failure Once continuity glass fibers has lost no quick easy repair Using epoxy resin place polyester will increase strength 15% 20% Continued page 124 Sailplanes International Krause MultiPlex Wan itschek Wik & Roke Sport-Scale-F3B European Hardware Accessories Send $500 Cat & Price List 209 577-0506 September 1985 121 DODGSON DESIGNS WINDSONG CHOICE OF CHAMPIONS the top thermal contest flyers over country turining Windsong top competition glider answer simple want win Meet Bernie Coleman Charlotte NC Windsong Pictured trophies Bernies winning 1st place overall high score third annual SHM Contest Winston-Salem N C May 11th 12th 1985 May 25th 26th 1985 Bernie won 2-meter K- ow predecessor Pixy 5th Open Class Rebel C C Rally Windsong John Gunsallus won first overall Ed Berton won 4th Windsongs Jacksonville FL Jake Watkins won 1985 NW NSS regional contest both open class overall high score flying windsong Dave Johnson won dard class Camano Dodgson Designs planes finished 1st C through 8th class want win sten Champions song 19995Cauiano 15995Pixy 14995 2 stamps catalog $25 VHS video tape I SW CAMANO DRIVE CAMANO ISLAND WA 9829 RC Scale/Wischers Continued page 121 thicker balsa sheeting /32 in place A6 will provide additional safety fac tor though weakness exists fiberglass cloth remains best method building-in strength com posite construction because large area covered flight surfaces point discussion shouldnt feel fiberglass makes wing stabilizer invulnerable damage After hard landing look compres sion fracture across wing strength impaired cutouts retract able landing gear stabilizers lower surface line attached fuselage likely point fracture Obviously same points vulnera ble airplanes covered fiber glass cloth Airplanes come apart midair have seen number heard others probably history bad-landing damage before catastrophe Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 responding advertisers mention read about Model Aviation RC Aerobatics/Van Putte Continued page 49 US team likely have airplanes like Laser 200 Frackowiaks Challenger II Chidgeys Tar Baby Circus Hobbies Stevens Akromaster other large slow airplanes powered fourcycle 120 engines problem Well could problem US team Lets suppose am foreign judge used seeing fast groovy airplanes perform Turn around pattern am judge World Championships would judge US team entries rule book says maneuver graded 'smoothness gracefulness' slow four-cycle-powered airplanes will look smooth graceful two-cycle-powered cousins US team could really get clobbered foreign judges saving feature US team entries will will able stay box much easi ly two-cycle-engine powered en tries make up some ground keeping maneuvers plane height will allow seen clearly judges approximately 60 vertically 1200 horizontally will interesting World Championships Doug Dahlke Oshkosh WI calls EAA-ville wrote help out think letter part said few quick comments column June 1985 First comments about ukie conversions RC R VP sounds like talking about CL stuff 20 years ago may intent sug gested . horizontal tail area 20% 25% wing area.. will turn page 70 June 1985 issue Ted Fanchers column will see .the area stab elevator should normally between 20% 25% wing area has pret ty much standard decade ukie Stunt ships True elevator should reduced RC Also clear trend towards longer aft movement arms CL Stunters Perhaps quite full 3 3 times suggest newer stuff much better respect Well what can say Perhaps can hedge saying first powered air plane RC deBolt Kitten flew 1954I never flew CL airplane life way whats ukie Just kidding meantime may landings wheels down Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 124 Modei Aviation DUDGSON DESIGNS 2904 read about Model Aviation writing advertisers mention QUARTERSCALE SPAN 89 SCALE PLANS & NOTES $ 2995 PARTIAL KIT & PLANS $12500 BUILT UP TO ROUGH IT $50000 OS 61 8500 $11500 PIPER Thi-PACER PA-22 PAN SCALE 5 DH-85 LEOPARD MOTHE SPAN SCALE 5 642-84651 DH-8O russ MOThE SPAN SCALE 5
Edition: Model Aviation - 1985/09
Page Numbers: 46, 47, 119, 120, 121, 124
Scale Bob Dolly Wischer MEASUREMENTS letter read er Finland asks elaboration methods taking measurements fullscale airplanes have past columns expounded virtues having pro totype available examination photos dimensional data neglected explain procedures made incor rect assumption everyone knew necessary steps Juhani Sederholm asks specifically method determining exactly shape unknown airfoil damaging surface air plane after permission granted make dimensional checks airfoil designation known its outlines can copied standard reference source such Handbook Airfoil Sec tions MS Rice Most important approach airplane prepared few items equipment addition usual 100-foot steel tape measure Make giant wooden sliding caliper can clamped tightly light pressure avoid damage wings leading trailing edges beam member caliper graduated inch marks along its length measure beam down wing surface graduated positions gives us dimensional profile airfoils upper surface caliper clamped similar manner wings lower surface process repeated same slid ing caliper can used determine measure airfoil shape fin stabilizer caliper fabricated wood sufficiently strong will sag its own weight should also quite light avoid heavy clamping pres sure could leave dents surfaces average wing chord wood beam member could have cross section x 1 end-bracket fixed beam notched fit leading edge radius second bracket also notched trailing edge slides along beam held place thumb screw will remain posi tion wing measurements being made Using same beam member add ing longer leg brackets caliper can used measure fuselage width depth 46 Model Aviation ii RETC BEA BE t ANGL youre going build Scale model based specific prototype planeand youre going measure prototype get dimensions make pianshere some suggestions easily accurately knows Roger Brennom ioves Northrop P61 Black Widowhes built several RC Scale models Heres latest 96ln wingspan 25ib wetght two OS 90 engines Construction foam Retracts electric Finish Hobbypoxy over poiyesterlepoxy especially handy fuselage cross section odd oval shape caliper can also used obtain dimen sions odd shapes such aft end engine cowl neither round nor oval Long strips paper similar tape used adding machines can wrapped around fuselage cowl held place bits self-stick tape known fixed point side fuselage panel line example use felt tip pen mark tape regular increments above below point Now caliper can adjusted measure fuselage width intermediate points ascertain odd-shaped cross Continued page 119 its hard capture beauty black model film assure Keith Shaws OH 85 Comet L fantastic 1I6scaie version EngiandtoAustralia Mac Robertson Black Magic entry Model spens 88 weighs 120 ozhaif its Electric power system Motors Keller 2511 2s won Best MonoKote award Toledo hadnt fellow stand ing background would hard believe Vuitee BT13 Vibrator really model Rl 115-scale spans 1008 wel ha 7 lb Power isa Quadra 50 Pat Massey took 19 months build addsd functional landing gear shock struts landing lights sliding canopy panel lines rivets Finish K&B resin over 6oz fiberglass cloth WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30 BALSA STICKS 36 48 1/162331/lOx1/400 3/32x2AS1i16c3/810 1/8 x2A31/lOx1/214 3/162483/321/410 1/4 x2083/32x3/812 1/323373/321/210 l/20x3371/Ox1/608 l/16x33748311/Ox1/41116 3/3234450371/Ox3/01218 1/6 x35471451/Ox1/21824 3/16x36282663/16x3/1O1116 1/4 x37395613/Ifix3/617 6/16x3853/161/22230 3/8 x368124711/4x1/41624 1/2 x31101561/4X081026 3/4 x31651/4X1/22130 1/16x46876461/4x3/43444 3/32x4JO94561/4x140 I/O x400106665/16x5/102128 3/16 x 493122783/0 x3/02737 1/4 x4110134843/Ox1/23246 3/6 x 41662253/Ox3/4A255 1/2 x42262613/Ox152 12x1/23653 MATCHEDSHEETS421/2 x3/44662 3/3241041/2x158 1/0x41085/Ox5/040 316x41203/4x3/467 14x4131 BALSA HOT LINE Call 806 745 6394 10am -6pm Central Time LIGHT 4-6 LB BALSA TRIANGLES 36WOOD36 1/4x1/425132x349 3/83/8301/203AS 1/21/2341/16x349 3/43/4453/32356 1x 1551/0x367 3/16x376 BALSA PLANKS361/4x305 11053/8x3115 121501/2x3139 132003/43220 142041x3300 1 1/232751/10470 1 1/243603/32491 222251/84100 2x33253764117 244351/4x4130 334953/84207 3460012x4202 TAPERED SHEETS36 1/4205TRAILING EDGE36 1/43851/4132 3/0x2665/16 11/439 3/03903/Ox 11/746 1/2312012270 LONE STAR EPOXY 9,Lxx-O 95 Sm,590 15 mIx690 30 mix590 INSTANTGLUE 1 xx Thick298 1 cc Thix296 2 cc Thick550 2 cx Thix550 SASS WODD48 3/1831626 3/161/430 3/10 3O38 3/101/246 3/163460 1/4x1/442 1/43/049 1/43/480 3/83/060 3/81/270 3/8x3490 1/21290 1/23/4100 BUNDLE DEALS 20-1/6334005 201/164361020 203/3233904E 15-3/32436955 151/0336715 10-1/8436675 15-3/16336900 103/16436810 1014336630 10-1/4x4x36090 103/8336850 53/Ox 430025 5-1/2336540 5-1/2436855 10-3/32448845 5-18440485 5-3/16x 440586 5-1/4x 446625 181/013171/43/0 10x1/416233/63/6 1/83/020273/81/2 316x3/101724 I3/03/4 3163823321/23/4 3/16x123040 1/4 lA2627 lAx3/82042 1/41/23447 3/Ox 3/83782 SPRUCE STICKS 36 48 1/8 1/815 18 141024 1/0 3/02029 3/163/102534 14 1/43145 14 3/83660 38 3/04563 38 125570 1/2 1/26080 1/2 3/46080 SPRUCE TRIANGLES 36 3/83/840 1/21/261 3/43/477 18 40 45 50 50 68 BIRCH DO WELS36 1009 3/1611 1/414 5/1626 3/032 3PLVBIRCH48 1/64x12526 1/3212425 1/1612435 1/8x12450 SPLYSIRCH48 3/3212570 1/012505 016125-OS 1/412600 GROOVED LG MOUNTS 13 IncheS LITE PL V483/Ox 3/4/1/8/40 1801603/83/415/32/40 LONE STAR MODELSHandling charge$300 pay UPS Add $200 COD $300 extra PP 1/23/43/16/45 APO FPO 1623 57th St Lubbock TX 79412,~ flflfl 100 .,.I, NA;.,fldo.-51000 1/812 300 September 1985 47 polished aluminum floats fuselage nose Orest Drobeys Beilanca Aircruiser attracted lots attention Toledo floate foam cores balsa aluminum cover Open structure covered MonoKote Craft spans 65% weighs 7 lb has OS Wankel engine built 1112 scale Fabulous itCUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa PINESTICKS 36 48HARD MAPLE span flaperons Wingspan just under three meters Access ballast com partment through spoiler bays change wing tip access used earlier design flew York fourth World Champs Dave Dyer still uses wing tip method providing access port ballast ing wing contains full-span tubes end parting line wing tip tip removed slugs ballast slid down wing root area via tubes ballast secured pre vented shifting toward tips filling voids varying lengths depending amount ballastof balsa dowels tip plugs place joint taped over system does have some drawbacks tapered wing wing tip thickness could determine maximum tube diam eter thereby restricting size dimension somewhat less what could used near root Dave design overcomes because Quabeck airfoil sections uses run thicknesses 85% root 100% tip thereby compensating somewhat chord taper hollow tubes also present some what non-standard building situation whether construction includes foam core built-up type couple photos month also clude some contrasts hardware design Observe two Stephan Smith/Australia displays guys down under design winchesmake all-terrain winches cart carries battery also complete winch toolbox turnaround fitted pneumatic tires Looks like ideal design shorthanded teamor team member winch itself secured frame high off ground order towline clear ground much possible turnaround pulley also staked high off ground order minimize line wear during winching retrieving operations motor Lucas M50 designed truck starter motor other picture winch shows Hi Im John Tatone let know am no longer affiliated TATONE PRODUCTS Corp will now manufacturing model engine accessories under new name JOHN TATONE COMPANY Items produced will similar have designed invented developed since 1956 now have available new generation Four Cycle engine mounts completely redesigned tailored specifically various engines mounts drilled tapped now fit engines perfectly Also two redesigned cast aluminum Engine Test Stands 1/2A 60 GIANT size engines 25 Wttnh fnr fur new nf incnwl mufflers German design motor Bosch product used starter Mercedes Benz 300 diesel Besides winchs simple straightforward design note line drum proportions fact 400 meters line already drum Its about two inches diameter about eight inches wide Compare Australian line drum about four inches wide six inches diameter advan tages German design smooth rapid accelerations during zoom part launch turnaround designs differed number teams competed Australia photos Xavier Heriard France compares French teams gimbal-mounted pulley American design French design allows pulley incline freely direction during launch Gary Ittner USA says know launch straight ahead can use shows off simplebut smoothversion used Mike Bame Mike Reagan As auto racing other high-tech sport some high-strung research makes life bit easier us downstream action same can said F3B its relation ship other types Soaring Well pass ideas future columns Good lift Dan Pruss 131 E Pennington Ln Plainfield IL 60S44 RC Scale/Wischers Continued page 47 section coordinates Obviously re quires help assistant two guiding calipers ends equally both sides fuselage graduations need used measurement After caliper has lifted fuselage merely measure across gap bracket tips read dimension directly carry short step ladders reach upper portions fuselage caliper clamped wing near its root cord can laid along beams upper surface stretched rearWE GIVE YOU CHOICE SCRATCH BUILD KIT BUILD OR SOMEWHERE IN-BETWEEN SCRATCH-A-PLANE offers finest engineered plans available complete fuil size tempiates part finest formed cowls canopies wheeipants heaviest practkai gauge ABS Butyrates now offers T-6 aluminum ianding gears prebent music wire landing gears cabanes v-struts plus complete wood paks AAA quality Balsa Aircraft grade & Lite-Piy Alaskan Sitka Spruce Apply templates supplied plan pak balsa plywood spend few hours cutting out parts hobby band saw construct finest flying easiest building kit youve ever owned K Rose offers 4 stroke performance dream about its optional flaps swept wing offers thrills experienced pilot yet docile enough trainer tVW 35 SCALE GLASAIR WING SPAN 80 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL CANOPY & WHEELPANTS $4495 CALL OR WRITE FOR COMPLETE LISTINGS AND PRICES OF DESIGNS AND ACCESSORIES SEE YOUR HOBBY SHOP OR ORDER DIRECT SHIPPING CHARGE S300 COD ORDERS ACCEPTED VISA & MASTERCHARGE WELCOME SCRATCH-A-PLANE 2060 ATHENS AVE REDOING CA 96004 916 241-4190 IF YOU CAN BUILD KIT YOU CAN BUILD SCRATCH-A-PLANE September 1985 119 NEW ITEMS AVAILABLE AT MOST HOBBY SHOPS IF NOT CONVENIENT ORDER DIRECT SEND SASE FOR FURTHER INFORMATION t4W 1/4 SCALE SHINGLETOWN ROSE WING SPAN 84 ENG 124 STROKE ROLLED PLAN PAK $2495 COWL FENDERS & WINDSHIELDS $3995 1/4 SCALE FOKKER DR-i WING SPAN 70 1/2 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL $1195 inEmEThe hinge allows control D tMIMU surface removal tools PATENTlost pins problems fr PENDINGcovering painting repair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots No Pins Rotate 900 14-6 $335 3#8I6.# $445 1 26 d $495 ward stabilizer determine angular difference between wing stabilizer incidence angles cord also indicates angle wing incidence relative fuselage centerline stabilizer adjustable type make certain measurements made center its adjustment range Measuring along curved surfaces can bit tricky tape measure stretched along fuselage side ftom rear propeller tail post following curve resulting measurement will distorted too long Avoid false reading measuring first prop point fuselage choosing vertical line such engine cowl edge door measure line elevator hinge line stretching tape parallel fuselage center dimension elevator hinge tail post added obtain true fuselage length would diawn paper side view Actually long dimen sion along curved fuselage surface can used during model design con struction cross-check find length shown top view difference -scale model can much inch two airplane wide fuselage Building model prototype benefit three-view drawing prepared known reliable source can quite time-consuming have done past find several days can spent taking dimensions making photos During process placing lines paper later time invariably number gaps remaining missing information Secondor thirdtrips airport museum normal Photos good reminders shapes usually minimum value dimensions because distortion photo process airplane out doors camera can great distance airplane long tele photo lens can used produce rela tively distortion-free photos some assistance making working draw ings model building standard 35mm SLR camera lens should have focal length 135mm greater exposures made lens aimed squarely right angles fuselage side front top view nearly impossible camera really no substitute tape measure time spent gathering data Taking dimensions full-size air craft always done datum lines points Length dimensions fuselage made propellers rear surface prominent vertical line chosen convenience Dimensions features made measuring fore aft line Critical dimensions wing leading edge spar landing gear wheel centers Tapered wings can troublesome particularly no parallel lines leading edge trailing edge straight-through main wing spar delineated presence rivet rows external surfaces cord stretched tween tips will establish arbitrary line measure stretched cord along top longeron along prominent panel line will aid locating relationship between fuselage centerline propeller shaft Shaft loca tion thrust offsets difficult locate accurately elements can have profound effect flight well appearance Scale models Ex tend stretched cord forward plane propellers rotation measure distance floor Meas ure distance prop shaft cen terline floor difference between two dimensions can placed accurately models con struction drawings Most measurements full-scale air craft straightforward use steel tape always starting fixed reference points lines job can proceed quickly once basics begun sketch pad pencil using freehand technique will provide record later transposed accurate drawings freehand sketches can very crude rudimentary no need repro duce true shape part freehand stage dimensions 120 Model Aviation jj17j1ASSOCIATESINC OFEST CLOUD WAY ATO CA 94545 780-4868 OTIS SOLD MT SO Fokker TnDiane 4 Flight TestedContest Proven RhInebeck 84 Results CamelFirst lanosSecond Scale 2 gine 60 Send 51001w latest prIce list lIterature VK MODEL AIRCRAFT CO 5866 Transit Rd Depew NY 14043 716 684-5555 jiImm~ Hosted Indian City Radio Control Club 0 Raffle Ready Fly GPM 540 CAP- 21 Less Radio BY Great Planes Model Mt g Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K nufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show BenjamIn F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES e BOATS S CARS S PLASTICS Auction C Refreshments e Free Parking Luedeman - 25505 Chernick Taylor Michigan 481~ Phone 31 3 295-0569 carry real importance Always look straight lines air craft structure Except nose cowlings tip outlines often surprising few curves found airplanes have seen three-view drawings showing curves fuselage outlines reali ty should have succession straight lines joined end end key feature sheet metal fuselages older airplanes aluminum formed direction few compound curves require costly tooling hand-working metal course exceptions Spit fire its curves comes mind modern aircraft also have extensive tooling complex shapes older types look straight lines curves exist often represent wooden string ers wood-former superstructure New publication specialty journal interest Scale modelers being launched 19 19-1939 Air Wars will carry information detailing aircraft perfor mance armament combat handling pilot reports wars between 1919 1939 will feature activities restorers replica-builders Scale modelers historians museums Issue No 1 includes articles 1936 Legion Condor Spain Waco military aircraft Fiat CR 32 Heinkel HE-S IA-l draw ings quarterly publication Write Air Wars 8931 Kittyhawk Ave Los Angeles CA 90045 Composites Greatest strength weight other exotic materials such Kevlar carbon fiber can dervied proper use commonly Used materials balsa plywood fiber Ilass past 10 years almost plywood models has lami nated two layers plywood ply plus balsa chief advantage other strength absence warping seems continual fault plywood use white glue very thin film tween layers sheet compressed between flat boards C-clamps Mini mum drying setting time warm condi tions hour after pressure can released part cut shape absolutely certain no later warping increase curing time eight hours Examples recent applications single bow frame canopy-support made 3 layers A2-in ply part cut sheet very narrow rim about A6-in square section 9-in wide has tremendous strength model should nose over tall grass negligible risk frac ture will easily support planes weight Fuselage bulkheads made laminating process two layers A-in %2-in ply can thinned out very narrow frame would equal weight ordinary balsa formersbut enormous strength comparison Laminating three layers two plywood balsa core affords light weight added rigidity resulting part has advantage greater thickness SAILPLANES WORLD iSOIA Cotfee Rd Modesto CA 95355 cementing surface fuselage bulkheads soft A-in balsa A-in ply faces ideal combina tion can used weight reduction structures large models process may seem wasteful because bulkhead center cut out scraps can used smaller parts fuselage aft end leftovers always used ever new lamination needed search through scrap box often waste time scraps long since absorbed another application External composites old standby fiberglass cloth laminated over balsa probably common combination Its weakness compression strength Air loads wing stabilizer will likely never great enough cause damage shock hard landing can cause compression fractures bottom sur faces Subsequent suddenly-applied loads due snap maneuvers change direc tion high speed could lead failure Once continuity glass fibers has lost no quick easy repair Using epoxy resin place polyester will increase strength 15% 20% Continued page 124 Sailplanes International Krause MultiPlex Wan itschek Wik & Roke Sport-Scale-F3B European Hardware Accessories Send $500 Cat & Price List 209 577-0506 September 1985 121 DODGSON DESIGNS WINDSONG CHOICE OF CHAMPIONS the top thermal contest flyers over country turining Windsong top competition glider answer simple want win Meet Bernie Coleman Charlotte NC Windsong Pictured trophies Bernies winning 1st place overall high score third annual SHM Contest Winston-Salem N C May 11th 12th 1985 May 25th 26th 1985 Bernie won 2-meter K- ow predecessor Pixy 5th Open Class Rebel C C Rally Windsong John Gunsallus won first overall Ed Berton won 4th Windsongs Jacksonville FL Jake Watkins won 1985 NW NSS regional contest both open class overall high score flying windsong Dave Johnson won dard class Camano Dodgson Designs planes finished 1st C through 8th class want win sten Champions song 19995Cauiano 15995Pixy 14995 2 stamps catalog $25 VHS video tape I SW CAMANO DRIVE CAMANO ISLAND WA 9829 RC Scale/Wischers Continued page 121 thicker balsa sheeting /32 in place A6 will provide additional safety fac tor though weakness exists fiberglass cloth remains best method building-in strength com posite construction because large area covered flight surfaces point discussion shouldnt feel fiberglass makes wing stabilizer invulnerable damage After hard landing look compres sion fracture across wing strength impaired cutouts retract able landing gear stabilizers lower surface line attached fuselage likely point fracture Obviously same points vulnera ble airplanes covered fiber glass cloth Airplanes come apart midair have seen number heard others probably history bad-landing damage before catastrophe Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 responding advertisers mention read about Model Aviation RC Aerobatics/Van Putte Continued page 49 US team likely have airplanes like Laser 200 Frackowiaks Challenger II Chidgeys Tar Baby Circus Hobbies Stevens Akromaster other large slow airplanes powered fourcycle 120 engines problem Well could problem US team Lets suppose am foreign judge used seeing fast groovy airplanes perform Turn around pattern am judge World Championships would judge US team entries rule book says maneuver graded 'smoothness gracefulness' slow four-cycle-powered airplanes will look smooth graceful two-cycle-powered cousins US team could really get clobbered foreign judges saving feature US team entries will will able stay box much easi ly two-cycle-engine powered en tries make up some ground keeping maneuvers plane height will allow seen clearly judges approximately 60 vertically 1200 horizontally will interesting World Championships Doug Dahlke Oshkosh WI calls EAA-ville wrote help out think letter part said few quick comments column June 1985 First comments about ukie conversions RC R VP sounds like talking about CL stuff 20 years ago may intent sug gested . horizontal tail area 20% 25% wing area.. will turn page 70 June 1985 issue Ted Fanchers column will see .the area stab elevator should normally between 20% 25% wing area has pret ty much standard decade ukie Stunt ships True elevator should reduced RC Also clear trend towards longer aft movement arms CL Stunters Perhaps quite full 3 3 times suggest newer stuff much better respect Well what can say Perhaps can hedge saying first powered air plane RC deBolt Kitten flew 1954I never flew CL airplane life way whats ukie Just kidding meantime may landings wheels down Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 124 Modei Aviation DUDGSON DESIGNS 2904 read about Model Aviation writing advertisers mention QUARTERSCALE SPAN 89 SCALE PLANS & NOTES $ 2995 PARTIAL KIT & PLANS $12500 BUILT UP TO ROUGH IT $50000 OS 61 8500 $11500 PIPER Thi-PACER PA-22 PAN SCALE 5 DH-85 LEOPARD MOTHE SPAN SCALE 5 642-84651 DH-8O russ MOThE SPAN SCALE 5
Edition: Model Aviation - 1985/09
Page Numbers: 46, 47, 119, 120, 121, 124
Scale Bob Dolly Wischer MEASUREMENTS letter read er Finland asks elaboration methods taking measurements fullscale airplanes have past columns expounded virtues having pro totype available examination photos dimensional data neglected explain procedures made incor rect assumption everyone knew necessary steps Juhani Sederholm asks specifically method determining exactly shape unknown airfoil damaging surface air plane after permission granted make dimensional checks airfoil designation known its outlines can copied standard reference source such Handbook Airfoil Sec tions MS Rice Most important approach airplane prepared few items equipment addition usual 100-foot steel tape measure Make giant wooden sliding caliper can clamped tightly light pressure avoid damage wings leading trailing edges beam member caliper graduated inch marks along its length measure beam down wing surface graduated positions gives us dimensional profile airfoils upper surface caliper clamped similar manner wings lower surface process repeated same slid ing caliper can used determine measure airfoil shape fin stabilizer caliper fabricated wood sufficiently strong will sag its own weight should also quite light avoid heavy clamping pres sure could leave dents surfaces average wing chord wood beam member could have cross section x 1 end-bracket fixed beam notched fit leading edge radius second bracket also notched trailing edge slides along beam held place thumb screw will remain posi tion wing measurements being made Using same beam member add ing longer leg brackets caliper can used measure fuselage width depth 46 Model Aviation ii RETC BEA BE t ANGL youre going build Scale model based specific prototype planeand youre going measure prototype get dimensions make pianshere some suggestions easily accurately knows Roger Brennom ioves Northrop P61 Black Widowhes built several RC Scale models Heres latest 96ln wingspan 25ib wetght two OS 90 engines Construction foam Retracts electric Finish Hobbypoxy over poiyesterlepoxy especially handy fuselage cross section odd oval shape caliper can also used obtain dimen sions odd shapes such aft end engine cowl neither round nor oval Long strips paper similar tape used adding machines can wrapped around fuselage cowl held place bits self-stick tape known fixed point side fuselage panel line example use felt tip pen mark tape regular increments above below point Now caliper can adjusted measure fuselage width intermediate points ascertain odd-shaped cross Continued page 119 its hard capture beauty black model film assure Keith Shaws OH 85 Comet L fantastic 1I6scaie version EngiandtoAustralia Mac Robertson Black Magic entry Model spens 88 weighs 120 ozhaif its Electric power system Motors Keller 2511 2s won Best MonoKote award Toledo hadnt fellow stand ing background would hard believe Vuitee BT13 Vibrator really model Rl 115-scale spans 1008 wel ha 7 lb Power isa Quadra 50 Pat Massey took 19 months build addsd functional landing gear shock struts landing lights sliding canopy panel lines rivets Finish K&B resin over 6oz fiberglass cloth WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30 BALSA STICKS 36 48 1/162331/lOx1/400 3/32x2AS1i16c3/810 1/8 x2A31/lOx1/214 3/162483/321/410 1/4 x2083/32x3/812 1/323373/321/210 l/20x3371/Ox1/608 l/16x33748311/Ox1/41116 3/3234450371/Ox3/01218 1/6 x35471451/Ox1/21824 3/16x36282663/16x3/1O1116 1/4 x37395613/Ifix3/617 6/16x3853/161/22230 3/8 x368124711/4x1/41624 1/2 x31101561/4X081026 3/4 x31651/4X1/22130 1/16x46876461/4x3/43444 3/32x4JO94561/4x140 I/O x400106665/16x5/102128 3/16 x 493122783/0 x3/02737 1/4 x4110134843/Ox1/23246 3/6 x 41662253/Ox3/4A255 1/2 x42262613/Ox152 12x1/23653 MATCHEDSHEETS421/2 x3/44662 3/3241041/2x158 1/0x41085/Ox5/040 316x41203/4x3/467 14x4131 BALSA HOT LINE Call 806 745 6394 10am -6pm Central Time LIGHT 4-6 LB BALSA TRIANGLES 36WOOD36 1/4x1/425132x349 3/83/8301/203AS 1/21/2341/16x349 3/43/4453/32356 1x 1551/0x367 3/16x376 BALSA PLANKS361/4x305 11053/8x3115 121501/2x3139 132003/43220 142041x3300 1 1/232751/10470 1 1/243603/32491 222251/84100 2x33253764117 244351/4x4130 334953/84207 3460012x4202 TAPERED SHEETS36 1/4205TRAILING EDGE36 1/43851/4132 3/0x2665/16 11/439 3/03903/Ox 11/746 1/2312012270 LONE STAR EPOXY 9,Lxx-O 95 Sm,590 15 mIx690 30 mix590 INSTANTGLUE 1 xx Thick298 1 cc Thix296 2 cc Thick550 2 cx Thix550 SASS WODD48 3/1831626 3/161/430 3/10 3O38 3/101/246 3/163460 1/4x1/442 1/43/049 1/43/480 3/83/060 3/81/270 3/8x3490 1/21290 1/23/4100 BUNDLE DEALS 20-1/6334005 201/164361020 203/3233904E 15-3/32436955 151/0336715 10-1/8436675 15-3/16336900 103/16436810 1014336630 10-1/4x4x36090 103/8336850 53/Ox 430025 5-1/2336540 5-1/2436855 10-3/32448845 5-18440485 5-3/16x 440586 5-1/4x 446625 181/013171/43/0 10x1/416233/63/6 1/83/020273/81/2 316x3/101724 I3/03/4 3163823321/23/4 3/16x123040 1/4 lA2627 lAx3/82042 1/41/23447 3/Ox 3/83782 SPRUCE STICKS 36 48 1/8 1/815 18 141024 1/0 3/02029 3/163/102534 14 1/43145 14 3/83660 38 3/04563 38 125570 1/2 1/26080 1/2 3/46080 SPRUCE TRIANGLES 36 3/83/840 1/21/261 3/43/477 18 40 45 50 50 68 BIRCH DO WELS36 1009 3/1611 1/414 5/1626 3/032 3PLVBIRCH48 1/64x12526 1/3212425 1/1612435 1/8x12450 SPLYSIRCH48 3/3212570 1/012505 016125-OS 1/412600 GROOVED LG MOUNTS 13 IncheS LITE PL V483/Ox 3/4/1/8/40 1801603/83/415/32/40 LONE STAR MODELSHandling charge$300 pay UPS Add $200 COD $300 extra PP 1/23/43/16/45 APO FPO 1623 57th St Lubbock TX 79412,~ flflfl 100 .,.I, NA;.,fldo.-51000 1/812 300 September 1985 47 polished aluminum floats fuselage nose Orest Drobeys Beilanca Aircruiser attracted lots attention Toledo floate foam cores balsa aluminum cover Open structure covered MonoKote Craft spans 65% weighs 7 lb has OS Wankel engine built 1112 scale Fabulous itCUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa PINESTICKS 36 48HARD MAPLE span flaperons Wingspan just under three meters Access ballast com partment through spoiler bays change wing tip access used earlier design flew York fourth World Champs Dave Dyer still uses wing tip method providing access port ballast ing wing contains full-span tubes end parting line wing tip tip removed slugs ballast slid down wing root area via tubes ballast secured pre vented shifting toward tips filling voids varying lengths depending amount ballastof balsa dowels tip plugs place joint taped over system does have some drawbacks tapered wing wing tip thickness could determine maximum tube diam eter thereby restricting size dimension somewhat less what could used near root Dave design overcomes because Quabeck airfoil sections uses run thicknesses 85% root 100% tip thereby compensating somewhat chord taper hollow tubes also present some what non-standard building situation whether construction includes foam core built-up type couple photos month also clude some contrasts hardware design Observe two Stephan Smith/Australia displays guys down under design winchesmake all-terrain winches cart carries battery also complete winch toolbox turnaround fitted pneumatic tires Looks like ideal design shorthanded teamor team member winch itself secured frame high off ground order towline clear ground much possible turnaround pulley also staked high off ground order minimize line wear during winching retrieving operations motor Lucas M50 designed truck starter motor other picture winch shows Hi Im John Tatone let know am no longer affiliated TATONE PRODUCTS Corp will now manufacturing model engine accessories under new name JOHN TATONE COMPANY Items produced will similar have designed invented developed since 1956 now have available new generation Four Cycle engine mounts completely redesigned tailored specifically various engines mounts drilled tapped now fit engines perfectly Also two redesigned cast aluminum Engine Test Stands 1/2A 60 GIANT size engines 25 Wttnh fnr fur new nf incnwl mufflers German design motor Bosch product used starter Mercedes Benz 300 diesel Besides winchs simple straightforward design note line drum proportions fact 400 meters line already drum Its about two inches diameter about eight inches wide Compare Australian line drum about four inches wide six inches diameter advan tages German design smooth rapid accelerations during zoom part launch turnaround designs differed number teams competed Australia photos Xavier Heriard France compares French teams gimbal-mounted pulley American design French design allows pulley incline freely direction during launch Gary Ittner USA says know launch straight ahead can use shows off simplebut smoothversion used Mike Bame Mike Reagan As auto racing other high-tech sport some high-strung research makes life bit easier us downstream action same can said F3B its relation ship other types Soaring Well pass ideas future columns Good lift Dan Pruss 131 E Pennington Ln Plainfield IL 60S44 RC Scale/Wischers Continued page 47 section coordinates Obviously re quires help assistant two guiding calipers ends equally both sides fuselage graduations need used measurement After caliper has lifted fuselage merely measure across gap bracket tips read dimension directly carry short step ladders reach upper portions fuselage caliper clamped wing near its root cord can laid along beams upper surface stretched rearWE GIVE YOU CHOICE SCRATCH BUILD KIT BUILD OR SOMEWHERE IN-BETWEEN SCRATCH-A-PLANE offers finest engineered plans available complete fuil size tempiates part finest formed cowls canopies wheeipants heaviest practkai gauge ABS Butyrates now offers T-6 aluminum ianding gears prebent music wire landing gears cabanes v-struts plus complete wood paks AAA quality Balsa Aircraft grade & Lite-Piy Alaskan Sitka Spruce Apply templates supplied plan pak balsa plywood spend few hours cutting out parts hobby band saw construct finest flying easiest building kit youve ever owned K Rose offers 4 stroke performance dream about its optional flaps swept wing offers thrills experienced pilot yet docile enough trainer tVW 35 SCALE GLASAIR WING SPAN 80 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL CANOPY & WHEELPANTS $4495 CALL OR WRITE FOR COMPLETE LISTINGS AND PRICES OF DESIGNS AND ACCESSORIES SEE YOUR HOBBY SHOP OR ORDER DIRECT SHIPPING CHARGE S300 COD ORDERS ACCEPTED VISA & MASTERCHARGE WELCOME SCRATCH-A-PLANE 2060 ATHENS AVE REDOING CA 96004 916 241-4190 IF YOU CAN BUILD KIT YOU CAN BUILD SCRATCH-A-PLANE September 1985 119 NEW ITEMS AVAILABLE AT MOST HOBBY SHOPS IF NOT CONVENIENT ORDER DIRECT SEND SASE FOR FURTHER INFORMATION t4W 1/4 SCALE SHINGLETOWN ROSE WING SPAN 84 ENG 124 STROKE ROLLED PLAN PAK $2495 COWL FENDERS & WINDSHIELDS $3995 1/4 SCALE FOKKER DR-i WING SPAN 70 1/2 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL $1195 inEmEThe hinge allows control D tMIMU surface removal tools PATENTlost pins problems fr PENDINGcovering painting repair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots No Pins Rotate 900 14-6 $335 3#8I6.# $445 1 26 d $495 ward stabilizer determine angular difference between wing stabilizer incidence angles cord also indicates angle wing incidence relative fuselage centerline stabilizer adjustable type make certain measurements made center its adjustment range Measuring along curved surfaces can bit tricky tape measure stretched along fuselage side ftom rear propeller tail post following curve resulting measurement will distorted too long Avoid false reading measuring first prop point fuselage choosing vertical line such engine cowl edge door measure line elevator hinge line stretching tape parallel fuselage center dimension elevator hinge tail post added obtain true fuselage length would diawn paper side view Actually long dimen sion along curved fuselage surface can used during model design con struction cross-check find length shown top view difference -scale model can much inch two airplane wide fuselage Building model prototype benefit three-view drawing prepared known reliable source can quite time-consuming have done past find several days can spent taking dimensions making photos During process placing lines paper later time invariably number gaps remaining missing information Secondor thirdtrips airport museum normal Photos good reminders shapes usually minimum value dimensions because distortion photo process airplane out doors camera can great distance airplane long tele photo lens can used produce rela tively distortion-free photos some assistance making working draw ings model building standard 35mm SLR camera lens should have focal length 135mm greater exposures made lens aimed squarely right angles fuselage side front top view nearly impossible camera really no substitute tape measure time spent gathering data Taking dimensions full-size air craft always done datum lines points Length dimensions fuselage made propellers rear surface prominent vertical line chosen convenience Dimensions features made measuring fore aft line Critical dimensions wing leading edge spar landing gear wheel centers Tapered wings can troublesome particularly no parallel lines leading edge trailing edge straight-through main wing spar delineated presence rivet rows external surfaces cord stretched tween tips will establish arbitrary line measure stretched cord along top longeron along prominent panel line will aid locating relationship between fuselage centerline propeller shaft Shaft loca tion thrust offsets difficult locate accurately elements can have profound effect flight well appearance Scale models Ex tend stretched cord forward plane propellers rotation measure distance floor Meas ure distance prop shaft cen terline floor difference between two dimensions can placed accurately models con struction drawings Most measurements full-scale air craft straightforward use steel tape always starting fixed reference points lines job can proceed quickly once basics begun sketch pad pencil using freehand technique will provide record later transposed accurate drawings freehand sketches can very crude rudimentary no need repro duce true shape part freehand stage dimensions 120 Model Aviation jj17j1ASSOCIATESINC OFEST CLOUD WAY ATO CA 94545 780-4868 OTIS SOLD MT SO Fokker TnDiane 4 Flight TestedContest Proven RhInebeck 84 Results CamelFirst lanosSecond Scale 2 gine 60 Send 51001w latest prIce list lIterature VK MODEL AIRCRAFT CO 5866 Transit Rd Depew NY 14043 716 684-5555 jiImm~ Hosted Indian City Radio Control Club 0 Raffle Ready Fly GPM 540 CAP- 21 Less Radio BY Great Planes Model Mt g Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K nufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show BenjamIn F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES e BOATS S CARS S PLASTICS Auction C Refreshments e Free Parking Luedeman - 25505 Chernick Taylor Michigan 481~ Phone 31 3 295-0569 carry real importance Always look straight lines air craft structure Except nose cowlings tip outlines often surprising few curves found airplanes have seen three-view drawings showing curves fuselage outlines reali ty should have succession straight lines joined end end key feature sheet metal fuselages older airplanes aluminum formed direction few compound curves require costly tooling hand-working metal course exceptions Spit fire its curves comes mind modern aircraft also have extensive tooling complex shapes older types look straight lines curves exist often represent wooden string ers wood-former superstructure New publication specialty journal interest Scale modelers being launched 19 19-1939 Air Wars will carry information detailing aircraft perfor mance armament combat handling pilot reports wars between 1919 1939 will feature activities restorers replica-builders Scale modelers historians museums Issue No 1 includes articles 1936 Legion Condor Spain Waco military aircraft Fiat CR 32 Heinkel HE-S IA-l draw ings quarterly publication Write Air Wars 8931 Kittyhawk Ave Los Angeles CA 90045 Composites Greatest strength weight other exotic materials such Kevlar carbon fiber can dervied proper use commonly Used materials balsa plywood fiber Ilass past 10 years almost plywood models has lami nated two layers plywood ply plus balsa chief advantage other strength absence warping seems continual fault plywood use white glue very thin film tween layers sheet compressed between flat boards C-clamps Mini mum drying setting time warm condi tions hour after pressure can released part cut shape absolutely certain no later warping increase curing time eight hours Examples recent applications single bow frame canopy-support made 3 layers A2-in ply part cut sheet very narrow rim about A6-in square section 9-in wide has tremendous strength model should nose over tall grass negligible risk frac ture will easily support planes weight Fuselage bulkheads made laminating process two layers A-in %2-in ply can thinned out very narrow frame would equal weight ordinary balsa formersbut enormous strength comparison Laminating three layers two plywood balsa core affords light weight added rigidity resulting part has advantage greater thickness SAILPLANES WORLD iSOIA Cotfee Rd Modesto CA 95355 cementing surface fuselage bulkheads soft A-in balsa A-in ply faces ideal combina tion can used weight reduction structures large models process may seem wasteful because bulkhead center cut out scraps can used smaller parts fuselage aft end leftovers always used ever new lamination needed search through scrap box often waste time scraps long since absorbed another application External composites old standby fiberglass cloth laminated over balsa probably common combination Its weakness compression strength Air loads wing stabilizer will likely never great enough cause damage shock hard landing can cause compression fractures bottom sur faces Subsequent suddenly-applied loads due snap maneuvers change direc tion high speed could lead failure Once continuity glass fibers has lost no quick easy repair Using epoxy resin place polyester will increase strength 15% 20% Continued page 124 Sailplanes International Krause MultiPlex Wan itschek Wik & Roke Sport-Scale-F3B European Hardware Accessories Send $500 Cat & Price List 209 577-0506 September 1985 121 DODGSON DESIGNS WINDSONG CHOICE OF CHAMPIONS the top thermal contest flyers over country turining Windsong top competition glider answer simple want win Meet Bernie Coleman Charlotte NC Windsong Pictured trophies Bernies winning 1st place overall high score third annual SHM Contest Winston-Salem N C May 11th 12th 1985 May 25th 26th 1985 Bernie won 2-meter K- ow predecessor Pixy 5th Open Class Rebel C C Rally Windsong John Gunsallus won first overall Ed Berton won 4th Windsongs Jacksonville FL Jake Watkins won 1985 NW NSS regional contest both open class overall high score flying windsong Dave Johnson won dard class Camano Dodgson Designs planes finished 1st C through 8th class want win sten Champions song 19995Cauiano 15995Pixy 14995 2 stamps catalog $25 VHS video tape I SW CAMANO DRIVE CAMANO ISLAND WA 9829 RC Scale/Wischers Continued page 121 thicker balsa sheeting /32 in place A6 will provide additional safety fac tor though weakness exists fiberglass cloth remains best method building-in strength com posite construction because large area covered flight surfaces point discussion shouldnt feel fiberglass makes wing stabilizer invulnerable damage After hard landing look compres sion fracture across wing strength impaired cutouts retract able landing gear stabilizers lower surface line attached fuselage likely point fracture Obviously same points vulnera ble airplanes covered fiber glass cloth Airplanes come apart midair have seen number heard others probably history bad-landing damage before catastrophe Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 responding advertisers mention read about Model Aviation RC Aerobatics/Van Putte Continued page 49 US team likely have airplanes like Laser 200 Frackowiaks Challenger II Chidgeys Tar Baby Circus Hobbies Stevens Akromaster other large slow airplanes powered fourcycle 120 engines problem Well could problem US team Lets suppose am foreign judge used seeing fast groovy airplanes perform Turn around pattern am judge World Championships would judge US team entries rule book says maneuver graded 'smoothness gracefulness' slow four-cycle-powered airplanes will look smooth graceful two-cycle-powered cousins US team could really get clobbered foreign judges saving feature US team entries will will able stay box much easi ly two-cycle-engine powered en tries make up some ground keeping maneuvers plane height will allow seen clearly judges approximately 60 vertically 1200 horizontally will interesting World Championships Doug Dahlke Oshkosh WI calls EAA-ville wrote help out think letter part said few quick comments column June 1985 First comments about ukie conversions RC R VP sounds like talking about CL stuff 20 years ago may intent sug gested . horizontal tail area 20% 25% wing area.. will turn page 70 June 1985 issue Ted Fanchers column will see .the area stab elevator should normally between 20% 25% wing area has pret ty much standard decade ukie Stunt ships True elevator should reduced RC Also clear trend towards longer aft movement arms CL Stunters Perhaps quite full 3 3 times suggest newer stuff much better respect Well what can say Perhaps can hedge saying first powered air plane RC deBolt Kitten flew 1954I never flew CL airplane life way whats ukie Just kidding meantime may landings wheels down Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 124 Modei Aviation DUDGSON DESIGNS 2904 read about Model Aviation writing advertisers mention QUARTERSCALE SPAN 89 SCALE PLANS & NOTES $ 2995 PARTIAL KIT & PLANS $12500 BUILT UP TO ROUGH IT $50000 OS 61 8500 $11500 PIPER Thi-PACER PA-22 PAN SCALE 5 DH-85 LEOPARD MOTHE SPAN SCALE 5 642-84651 DH-8O russ MOThE SPAN SCALE 5
Edition: Model Aviation - 1985/09
Page Numbers: 46, 47, 119, 120, 121, 124
Scale Bob Dolly Wischer MEASUREMENTS letter read er Finland asks elaboration methods taking measurements fullscale airplanes have past columns expounded virtues having pro totype available examination photos dimensional data neglected explain procedures made incor rect assumption everyone knew necessary steps Juhani Sederholm asks specifically method determining exactly shape unknown airfoil damaging surface air plane after permission granted make dimensional checks airfoil designation known its outlines can copied standard reference source such Handbook Airfoil Sec tions MS Rice Most important approach airplane prepared few items equipment addition usual 100-foot steel tape measure Make giant wooden sliding caliper can clamped tightly light pressure avoid damage wings leading trailing edges beam member caliper graduated inch marks along its length measure beam down wing surface graduated positions gives us dimensional profile airfoils upper surface caliper clamped similar manner wings lower surface process repeated same slid ing caliper can used determine measure airfoil shape fin stabilizer caliper fabricated wood sufficiently strong will sag its own weight should also quite light avoid heavy clamping pres sure could leave dents surfaces average wing chord wood beam member could have cross section x 1 end-bracket fixed beam notched fit leading edge radius second bracket also notched trailing edge slides along beam held place thumb screw will remain posi tion wing measurements being made Using same beam member add ing longer leg brackets caliper can used measure fuselage width depth 46 Model Aviation ii RETC BEA BE t ANGL youre going build Scale model based specific prototype planeand youre going measure prototype get dimensions make pianshere some suggestions easily accurately knows Roger Brennom ioves Northrop P61 Black Widowhes built several RC Scale models Heres latest 96ln wingspan 25ib wetght two OS 90 engines Construction foam Retracts electric Finish Hobbypoxy over poiyesterlepoxy especially handy fuselage cross section odd oval shape caliper can also used obtain dimen sions odd shapes such aft end engine cowl neither round nor oval Long strips paper similar tape used adding machines can wrapped around fuselage cowl held place bits self-stick tape known fixed point side fuselage panel line example use felt tip pen mark tape regular increments above below point Now caliper can adjusted measure fuselage width intermediate points ascertain odd-shaped cross Continued page 119 its hard capture beauty black model film assure Keith Shaws OH 85 Comet L fantastic 1I6scaie version EngiandtoAustralia Mac Robertson Black Magic entry Model spens 88 weighs 120 ozhaif its Electric power system Motors Keller 2511 2s won Best MonoKote award Toledo hadnt fellow stand ing background would hard believe Vuitee BT13 Vibrator really model Rl 115-scale spans 1008 wel ha 7 lb Power isa Quadra 50 Pat Massey took 19 months build addsd functional landing gear shock struts landing lights sliding canopy panel lines rivets Finish K&B resin over 6oz fiberglass cloth WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30 BALSA STICKS 36 48 1/162331/lOx1/400 3/32x2AS1i16c3/810 1/8 x2A31/lOx1/214 3/162483/321/410 1/4 x2083/32x3/812 1/323373/321/210 l/20x3371/Ox1/608 l/16x33748311/Ox1/41116 3/3234450371/Ox3/01218 1/6 x35471451/Ox1/21824 3/16x36282663/16x3/1O1116 1/4 x37395613/Ifix3/617 6/16x3853/161/22230 3/8 x368124711/4x1/41624 1/2 x31101561/4X081026 3/4 x31651/4X1/22130 1/16x46876461/4x3/43444 3/32x4JO94561/4x140 I/O x400106665/16x5/102128 3/16 x 493122783/0 x3/02737 1/4 x4110134843/Ox1/23246 3/6 x 41662253/Ox3/4A255 1/2 x42262613/Ox152 12x1/23653 MATCHEDSHEETS421/2 x3/44662 3/3241041/2x158 1/0x41085/Ox5/040 316x41203/4x3/467 14x4131 BALSA HOT LINE Call 806 745 6394 10am -6pm Central Time LIGHT 4-6 LB BALSA TRIANGLES 36WOOD36 1/4x1/425132x349 3/83/8301/203AS 1/21/2341/16x349 3/43/4453/32356 1x 1551/0x367 3/16x376 BALSA PLANKS361/4x305 11053/8x3115 121501/2x3139 132003/43220 142041x3300 1 1/232751/10470 1 1/243603/32491 222251/84100 2x33253764117 244351/4x4130 334953/84207 3460012x4202 TAPERED SHEETS36 1/4205TRAILING EDGE36 1/43851/4132 3/0x2665/16 11/439 3/03903/Ox 11/746 1/2312012270 LONE STAR EPOXY 9,Lxx-O 95 Sm,590 15 mIx690 30 mix590 INSTANTGLUE 1 xx Thick298 1 cc Thix296 2 cc Thick550 2 cx Thix550 SASS WODD48 3/1831626 3/161/430 3/10 3O38 3/101/246 3/163460 1/4x1/442 1/43/049 1/43/480 3/83/060 3/81/270 3/8x3490 1/21290 1/23/4100 BUNDLE DEALS 20-1/6334005 201/164361020 203/3233904E 15-3/32436955 151/0336715 10-1/8436675 15-3/16336900 103/16436810 1014336630 10-1/4x4x36090 103/8336850 53/Ox 430025 5-1/2336540 5-1/2436855 10-3/32448845 5-18440485 5-3/16x 440586 5-1/4x 446625 181/013171/43/0 10x1/416233/63/6 1/83/020273/81/2 316x3/101724 I3/03/4 3163823321/23/4 3/16x123040 1/4 lA2627 lAx3/82042 1/41/23447 3/Ox 3/83782 SPRUCE STICKS 36 48 1/8 1/815 18 141024 1/0 3/02029 3/163/102534 14 1/43145 14 3/83660 38 3/04563 38 125570 1/2 1/26080 1/2 3/46080 SPRUCE TRIANGLES 36 3/83/840 1/21/261 3/43/477 18 40 45 50 50 68 BIRCH DO WELS36 1009 3/1611 1/414 5/1626 3/032 3PLVBIRCH48 1/64x12526 1/3212425 1/1612435 1/8x12450 SPLYSIRCH48 3/3212570 1/012505 016125-OS 1/412600 GROOVED LG MOUNTS 13 IncheS LITE PL V483/Ox 3/4/1/8/40 1801603/83/415/32/40 LONE STAR MODELSHandling charge$300 pay UPS Add $200 COD $300 extra PP 1/23/43/16/45 APO FPO 1623 57th St Lubbock TX 79412,~ flflfl 100 .,.I, NA;.,fldo.-51000 1/812 300 September 1985 47 polished aluminum floats fuselage nose Orest Drobeys Beilanca Aircruiser attracted lots attention Toledo floate foam cores balsa aluminum cover Open structure covered MonoKote Craft spans 65% weighs 7 lb has OS Wankel engine built 1112 scale Fabulous itCUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa PINESTICKS 36 48HARD MAPLE span flaperons Wingspan just under three meters Access ballast com partment through spoiler bays change wing tip access used earlier design flew York fourth World Champs Dave Dyer still uses wing tip method providing access port ballast ing wing contains full-span tubes end parting line wing tip tip removed slugs ballast slid down wing root area via tubes ballast secured pre vented shifting toward tips filling voids varying lengths depending amount ballastof balsa dowels tip plugs place joint taped over system does have some drawbacks tapered wing wing tip thickness could determine maximum tube diam eter thereby restricting size dimension somewhat less what could used near root Dave design overcomes because Quabeck airfoil sections uses run thicknesses 85% root 100% tip thereby compensating somewhat chord taper hollow tubes also present some what non-standard building situation whether construction includes foam core built-up type couple photos month also clude some contrasts hardware design Observe two Stephan Smith/Australia displays guys down under design winchesmake all-terrain winches cart carries battery also complete winch toolbox turnaround fitted pneumatic tires Looks like ideal design shorthanded teamor team member winch itself secured frame high off ground order towline clear ground much possible turnaround pulley also staked high off ground order minimize line wear during winching retrieving operations motor Lucas M50 designed truck starter motor other picture winch shows Hi Im John Tatone let know am no longer affiliated TATONE PRODUCTS Corp will now manufacturing model engine accessories under new name JOHN TATONE COMPANY Items produced will similar have designed invented developed since 1956 now have available new generation Four Cycle engine mounts completely redesigned tailored specifically various engines mounts drilled tapped now fit engines perfectly Also two redesigned cast aluminum Engine Test Stands 1/2A 60 GIANT size engines 25 Wttnh fnr fur new nf incnwl mufflers German design motor Bosch product used starter Mercedes Benz 300 diesel Besides winchs simple straightforward design note line drum proportions fact 400 meters line already drum Its about two inches diameter about eight inches wide Compare Australian line drum about four inches wide six inches diameter advan tages German design smooth rapid accelerations during zoom part launch turnaround designs differed number teams competed Australia photos Xavier Heriard France compares French teams gimbal-mounted pulley American design French design allows pulley incline freely direction during launch Gary Ittner USA says know launch straight ahead can use shows off simplebut smoothversion used Mike Bame Mike Reagan As auto racing other high-tech sport some high-strung research makes life bit easier us downstream action same can said F3B its relation ship other types Soaring Well pass ideas future columns Good lift Dan Pruss 131 E Pennington Ln Plainfield IL 60S44 RC Scale/Wischers Continued page 47 section coordinates Obviously re quires help assistant two guiding calipers ends equally both sides fuselage graduations need used measurement After caliper has lifted fuselage merely measure across gap bracket tips read dimension directly carry short step ladders reach upper portions fuselage caliper clamped wing near its root cord can laid along beams upper surface stretched rearWE GIVE YOU CHOICE SCRATCH BUILD KIT BUILD OR SOMEWHERE IN-BETWEEN SCRATCH-A-PLANE offers finest engineered plans available complete fuil size tempiates part finest formed cowls canopies wheeipants heaviest practkai gauge ABS Butyrates now offers T-6 aluminum ianding gears prebent music wire landing gears cabanes v-struts plus complete wood paks AAA quality Balsa Aircraft grade & Lite-Piy Alaskan Sitka Spruce Apply templates supplied plan pak balsa plywood spend few hours cutting out parts hobby band saw construct finest flying easiest building kit youve ever owned K Rose offers 4 stroke performance dream about its optional flaps swept wing offers thrills experienced pilot yet docile enough trainer tVW 35 SCALE GLASAIR WING SPAN 80 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL CANOPY & WHEELPANTS $4495 CALL OR WRITE FOR COMPLETE LISTINGS AND PRICES OF DESIGNS AND ACCESSORIES SEE YOUR HOBBY SHOP OR ORDER DIRECT SHIPPING CHARGE S300 COD ORDERS ACCEPTED VISA & MASTERCHARGE WELCOME SCRATCH-A-PLANE 2060 ATHENS AVE REDOING CA 96004 916 241-4190 IF YOU CAN BUILD KIT YOU CAN BUILD SCRATCH-A-PLANE September 1985 119 NEW ITEMS AVAILABLE AT MOST HOBBY SHOPS IF NOT CONVENIENT ORDER DIRECT SEND SASE FOR FURTHER INFORMATION t4W 1/4 SCALE SHINGLETOWN ROSE WING SPAN 84 ENG 124 STROKE ROLLED PLAN PAK $2495 COWL FENDERS & WINDSHIELDS $3995 1/4 SCALE FOKKER DR-i WING SPAN 70 1/2 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL $1195 inEmEThe hinge allows control D tMIMU surface removal tools PATENTlost pins problems fr PENDINGcovering painting repair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots No Pins Rotate 900 14-6 $335 3#8I6.# $445 1 26 d $495 ward stabilizer determine angular difference between wing stabilizer incidence angles cord also indicates angle wing incidence relative fuselage centerline stabilizer adjustable type make certain measurements made center its adjustment range Measuring along curved surfaces can bit tricky tape measure stretched along fuselage side ftom rear propeller tail post following curve resulting measurement will distorted too long Avoid false reading measuring first prop point fuselage choosing vertical line such engine cowl edge door measure line elevator hinge line stretching tape parallel fuselage center dimension elevator hinge tail post added obtain true fuselage length would diawn paper side view Actually long dimen sion along curved fuselage surface can used during model design con struction cross-check find length shown top view difference -scale model can much inch two airplane wide fuselage Building model prototype benefit three-view drawing prepared known reliable source can quite time-consuming have done past find several days can spent taking dimensions making photos During process placing lines paper later time invariably number gaps remaining missing information Secondor thirdtrips airport museum normal Photos good reminders shapes usually minimum value dimensions because distortion photo process airplane out doors camera can great distance airplane long tele photo lens can used produce rela tively distortion-free photos some assistance making working draw ings model building standard 35mm SLR camera lens should have focal length 135mm greater exposures made lens aimed squarely right angles fuselage side front top view nearly impossible camera really no substitute tape measure time spent gathering data Taking dimensions full-size air craft always done datum lines points Length dimensions fuselage made propellers rear surface prominent vertical line chosen convenience Dimensions features made measuring fore aft line Critical dimensions wing leading edge spar landing gear wheel centers Tapered wings can troublesome particularly no parallel lines leading edge trailing edge straight-through main wing spar delineated presence rivet rows external surfaces cord stretched tween tips will establish arbitrary line measure stretched cord along top longeron along prominent panel line will aid locating relationship between fuselage centerline propeller shaft Shaft loca tion thrust offsets difficult locate accurately elements can have profound effect flight well appearance Scale models Ex tend stretched cord forward plane propellers rotation measure distance floor Meas ure distance prop shaft cen terline floor difference between two dimensions can placed accurately models con struction drawings Most measurements full-scale air craft straightforward use steel tape always starting fixed reference points lines job can proceed quickly once basics begun sketch pad pencil using freehand technique will provide record later transposed accurate drawings freehand sketches can very crude rudimentary no need repro duce true shape part freehand stage dimensions 120 Model Aviation jj17j1ASSOCIATESINC OFEST CLOUD WAY ATO CA 94545 780-4868 OTIS SOLD MT SO Fokker TnDiane 4 Flight TestedContest Proven RhInebeck 84 Results CamelFirst lanosSecond Scale 2 gine 60 Send 51001w latest prIce list lIterature VK MODEL AIRCRAFT CO 5866 Transit Rd Depew NY 14043 716 684-5555 jiImm~ Hosted Indian City Radio Control Club 0 Raffle Ready Fly GPM 540 CAP- 21 Less Radio BY Great Planes Model Mt g Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K nufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show BenjamIn F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES e BOATS S CARS S PLASTICS Auction C Refreshments e Free Parking Luedeman - 25505 Chernick Taylor Michigan 481~ Phone 31 3 295-0569 carry real importance Always look straight lines air craft structure Except nose cowlings tip outlines often surprising few curves found airplanes have seen three-view drawings showing curves fuselage outlines reali ty should have succession straight lines joined end end key feature sheet metal fuselages older airplanes aluminum formed direction few compound curves require costly tooling hand-working metal course exceptions Spit fire its curves comes mind modern aircraft also have extensive tooling complex shapes older types look straight lines curves exist often represent wooden string ers wood-former superstructure New publication specialty journal interest Scale modelers being launched 19 19-1939 Air Wars will carry information detailing aircraft perfor mance armament combat handling pilot reports wars between 1919 1939 will feature activities restorers replica-builders Scale modelers historians museums Issue No 1 includes articles 1936 Legion Condor Spain Waco military aircraft Fiat CR 32 Heinkel HE-S IA-l draw ings quarterly publication Write Air Wars 8931 Kittyhawk Ave Los Angeles CA 90045 Composites Greatest strength weight other exotic materials such Kevlar carbon fiber can dervied proper use commonly Used materials balsa plywood fiber Ilass past 10 years almost plywood models has lami nated two layers plywood ply plus balsa chief advantage other strength absence warping seems continual fault plywood use white glue very thin film tween layers sheet compressed between flat boards C-clamps Mini mum drying setting time warm condi tions hour after pressure can released part cut shape absolutely certain no later warping increase curing time eight hours Examples recent applications single bow frame canopy-support made 3 layers A2-in ply part cut sheet very narrow rim about A6-in square section 9-in wide has tremendous strength model should nose over tall grass negligible risk frac ture will easily support planes weight Fuselage bulkheads made laminating process two layers A-in %2-in ply can thinned out very narrow frame would equal weight ordinary balsa formersbut enormous strength comparison Laminating three layers two plywood balsa core affords light weight added rigidity resulting part has advantage greater thickness SAILPLANES WORLD iSOIA Cotfee Rd Modesto CA 95355 cementing surface fuselage bulkheads soft A-in balsa A-in ply faces ideal combina tion can used weight reduction structures large models process may seem wasteful because bulkhead center cut out scraps can used smaller parts fuselage aft end leftovers always used ever new lamination needed search through scrap box often waste time scraps long since absorbed another application External composites old standby fiberglass cloth laminated over balsa probably common combination Its weakness compression strength Air loads wing stabilizer will likely never great enough cause damage shock hard landing can cause compression fractures bottom sur faces Subsequent suddenly-applied loads due snap maneuvers change direc tion high speed could lead failure Once continuity glass fibers has lost no quick easy repair Using epoxy resin place polyester will increase strength 15% 20% Continued page 124 Sailplanes International Krause MultiPlex Wan itschek Wik & Roke Sport-Scale-F3B European Hardware Accessories Send $500 Cat & Price List 209 577-0506 September 1985 121 DODGSON DESIGNS WINDSONG CHOICE OF CHAMPIONS the top thermal contest flyers over country turining Windsong top competition glider answer simple want win Meet Bernie Coleman Charlotte NC Windsong Pictured trophies Bernies winning 1st place overall high score third annual SHM Contest Winston-Salem N C May 11th 12th 1985 May 25th 26th 1985 Bernie won 2-meter K- ow predecessor Pixy 5th Open Class Rebel C C Rally Windsong John Gunsallus won first overall Ed Berton won 4th Windsongs Jacksonville FL Jake Watkins won 1985 NW NSS regional contest both open class overall high score flying windsong Dave Johnson won dard class Camano Dodgson Designs planes finished 1st C through 8th class want win sten Champions song 19995Cauiano 15995Pixy 14995 2 stamps catalog $25 VHS video tape I SW CAMANO DRIVE CAMANO ISLAND WA 9829 RC Scale/Wischers Continued page 121 thicker balsa sheeting /32 in place A6 will provide additional safety fac tor though weakness exists fiberglass cloth remains best method building-in strength com posite construction because large area covered flight surfaces point discussion shouldnt feel fiberglass makes wing stabilizer invulnerable damage After hard landing look compres sion fracture across wing strength impaired cutouts retract able landing gear stabilizers lower surface line attached fuselage likely point fracture Obviously same points vulnera ble airplanes covered fiber glass cloth Airplanes come apart midair have seen number heard others probably history bad-landing damage before catastrophe Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 responding advertisers mention read about Model Aviation RC Aerobatics/Van Putte Continued page 49 US team likely have airplanes like Laser 200 Frackowiaks Challenger II Chidgeys Tar Baby Circus Hobbies Stevens Akromaster other large slow airplanes powered fourcycle 120 engines problem Well could problem US team Lets suppose am foreign judge used seeing fast groovy airplanes perform Turn around pattern am judge World Championships would judge US team entries rule book says maneuver graded 'smoothness gracefulness' slow four-cycle-powered airplanes will look smooth graceful two-cycle-powered cousins US team could really get clobbered foreign judges saving feature US team entries will will able stay box much easi ly two-cycle-engine powered en tries make up some ground keeping maneuvers plane height will allow seen clearly judges approximately 60 vertically 1200 horizontally will interesting World Championships Doug Dahlke Oshkosh WI calls EAA-ville wrote help out think letter part said few quick comments column June 1985 First comments about ukie conversions RC R VP sounds like talking about CL stuff 20 years ago may intent sug gested . horizontal tail area 20% 25% wing area.. will turn page 70 June 1985 issue Ted Fanchers column will see .the area stab elevator should normally between 20% 25% wing area has pret ty much standard decade ukie Stunt ships True elevator should reduced RC Also clear trend towards longer aft movement arms CL Stunters Perhaps quite full 3 3 times suggest newer stuff much better respect Well what can say Perhaps can hedge saying first powered air plane RC deBolt Kitten flew 1954I never flew CL airplane life way whats ukie Just kidding meantime may landings wheels down Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 124 Modei Aviation DUDGSON DESIGNS 2904 read about Model Aviation writing advertisers mention QUARTERSCALE SPAN 89 SCALE PLANS & NOTES $ 2995 PARTIAL KIT & PLANS $12500 BUILT UP TO ROUGH IT $50000 OS 61 8500 $11500 PIPER Thi-PACER PA-22 PAN SCALE 5 DH-85 LEOPARD MOTHE SPAN SCALE 5 642-84651 DH-8O russ MOThE SPAN SCALE 5
Edition: Model Aviation - 1985/09
Page Numbers: 46, 47, 119, 120, 121, 124
Scale Bob Dolly Wischer MEASUREMENTS letter read er Finland asks elaboration methods taking measurements fullscale airplanes have past columns expounded virtues having pro totype available examination photos dimensional data neglected explain procedures made incor rect assumption everyone knew necessary steps Juhani Sederholm asks specifically method determining exactly shape unknown airfoil damaging surface air plane after permission granted make dimensional checks airfoil designation known its outlines can copied standard reference source such Handbook Airfoil Sec tions MS Rice Most important approach airplane prepared few items equipment addition usual 100-foot steel tape measure Make giant wooden sliding caliper can clamped tightly light pressure avoid damage wings leading trailing edges beam member caliper graduated inch marks along its length measure beam down wing surface graduated positions gives us dimensional profile airfoils upper surface caliper clamped similar manner wings lower surface process repeated same slid ing caliper can used determine measure airfoil shape fin stabilizer caliper fabricated wood sufficiently strong will sag its own weight should also quite light avoid heavy clamping pres sure could leave dents surfaces average wing chord wood beam member could have cross section x 1 end-bracket fixed beam notched fit leading edge radius second bracket also notched trailing edge slides along beam held place thumb screw will remain posi tion wing measurements being made Using same beam member add ing longer leg brackets caliper can used measure fuselage width depth 46 Model Aviation ii RETC BEA BE t ANGL youre going build Scale model based specific prototype planeand youre going measure prototype get dimensions make pianshere some suggestions easily accurately knows Roger Brennom ioves Northrop P61 Black Widowhes built several RC Scale models Heres latest 96ln wingspan 25ib wetght two OS 90 engines Construction foam Retracts electric Finish Hobbypoxy over poiyesterlepoxy especially handy fuselage cross section odd oval shape caliper can also used obtain dimen sions odd shapes such aft end engine cowl neither round nor oval Long strips paper similar tape used adding machines can wrapped around fuselage cowl held place bits self-stick tape known fixed point side fuselage panel line example use felt tip pen mark tape regular increments above below point Now caliper can adjusted measure fuselage width intermediate points ascertain odd-shaped cross Continued page 119 its hard capture beauty black model film assure Keith Shaws OH 85 Comet L fantastic 1I6scaie version EngiandtoAustralia Mac Robertson Black Magic entry Model spens 88 weighs 120 ozhaif its Electric power system Motors Keller 2511 2s won Best MonoKote award Toledo hadnt fellow stand ing background would hard believe Vuitee BT13 Vibrator really model Rl 115-scale spans 1008 wel ha 7 lb Power isa Quadra 50 Pat Massey took 19 months build addsd functional landing gear shock struts landing lights sliding canopy panel lines rivets Finish K&B resin over 6oz fiberglass cloth WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS 36 48 30 BALSA STICKS 36 48 1/162331/lOx1/400 3/32x2AS1i16c3/810 1/8 x2A31/lOx1/214 3/162483/321/410 1/4 x2083/32x3/812 1/323373/321/210 l/20x3371/Ox1/608 l/16x33748311/Ox1/41116 3/3234450371/Ox3/01218 1/6 x35471451/Ox1/21824 3/16x36282663/16x3/1O1116 1/4 x37395613/Ifix3/617 6/16x3853/161/22230 3/8 x368124711/4x1/41624 1/2 x31101561/4X081026 3/4 x31651/4X1/22130 1/16x46876461/4x3/43444 3/32x4JO94561/4x140 I/O x400106665/16x5/102128 3/16 x 493122783/0 x3/02737 1/4 x4110134843/Ox1/23246 3/6 x 41662253/Ox3/4A255 1/2 x42262613/Ox152 12x1/23653 MATCHEDSHEETS421/2 x3/44662 3/3241041/2x158 1/0x41085/Ox5/040 316x41203/4x3/467 14x4131 BALSA HOT LINE Call 806 745 6394 10am -6pm Central Time LIGHT 4-6 LB BALSA TRIANGLES 36WOOD36 1/4x1/425132x349 3/83/8301/203AS 1/21/2341/16x349 3/43/4453/32356 1x 1551/0x367 3/16x376 BALSA PLANKS361/4x305 11053/8x3115 121501/2x3139 132003/43220 142041x3300 1 1/232751/10470 1 1/243603/32491 222251/84100 2x33253764117 244351/4x4130 334953/84207 3460012x4202 TAPERED SHEETS36 1/4205TRAILING EDGE36 1/43851/4132 3/0x2665/16 11/439 3/03903/Ox 11/746 1/2312012270 LONE STAR EPOXY 9,Lxx-O 95 Sm,590 15 mIx690 30 mix590 INSTANTGLUE 1 xx Thick298 1 cc Thix296 2 cc Thick550 2 cx Thix550 SASS WODD48 3/1831626 3/161/430 3/10 3O38 3/101/246 3/163460 1/4x1/442 1/43/049 1/43/480 3/83/060 3/81/270 3/8x3490 1/21290 1/23/4100 BUNDLE DEALS 20-1/6334005 201/164361020 203/3233904E 15-3/32436955 151/0336715 10-1/8436675 15-3/16336900 103/16436810 1014336630 10-1/4x4x36090 103/8336850 53/Ox 430025 5-1/2336540 5-1/2436855 10-3/32448845 5-18440485 5-3/16x 440586 5-1/4x 446625 181/013171/43/0 10x1/416233/63/6 1/83/020273/81/2 316x3/101724 I3/03/4 3163823321/23/4 3/16x123040 1/4 lA2627 lAx3/82042 1/41/23447 3/Ox 3/83782 SPRUCE STICKS 36 48 1/8 1/815 18 141024 1/0 3/02029 3/163/102534 14 1/43145 14 3/83660 38 3/04563 38 125570 1/2 1/26080 1/2 3/46080 SPRUCE TRIANGLES 36 3/83/840 1/21/261 3/43/477 18 40 45 50 50 68 BIRCH DO WELS36 1009 3/1611 1/414 5/1626 3/032 3PLVBIRCH48 1/64x12526 1/3212425 1/1612435 1/8x12450 SPLYSIRCH48 3/3212570 1/012505 016125-OS 1/412600 GROOVED LG MOUNTS 13 IncheS LITE PL V483/Ox 3/4/1/8/40 1801603/83/415/32/40 LONE STAR MODELSHandling charge$300 pay UPS Add $200 COD $300 extra PP 1/23/43/16/45 APO FPO 1623 57th St Lubbock TX 79412,~ flflfl 100 .,.I, NA;.,fldo.-51000 1/812 300 September 1985 47 polished aluminum floats fuselage nose Orest Drobeys Beilanca Aircruiser attracted lots attention Toledo floate foam cores balsa aluminum cover Open structure covered MonoKote Craft spans 65% weighs 7 lb has OS Wankel engine built 1112 scale Fabulous itCUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa PINESTICKS 36 48HARD MAPLE span flaperons Wingspan just under three meters Access ballast com partment through spoiler bays change wing tip access used earlier design flew York fourth World Champs Dave Dyer still uses wing tip method providing access port ballast ing wing contains full-span tubes end parting line wing tip tip removed slugs ballast slid down wing root area via tubes ballast secured pre vented shifting toward tips filling voids varying lengths depending amount ballastof balsa dowels tip plugs place joint taped over system does have some drawbacks tapered wing wing tip thickness could determine maximum tube diam eter thereby restricting size dimension somewhat less what could used near root Dave design overcomes because Quabeck airfoil sections uses run thicknesses 85% root 100% tip thereby compensating somewhat chord taper hollow tubes also present some what non-standard building situation whether construction includes foam core built-up type couple photos month also clude some contrasts hardware design Observe two Stephan Smith/Australia displays guys down under design winchesmake all-terrain winches cart carries battery also complete winch toolbox turnaround fitted pneumatic tires Looks like ideal design shorthanded teamor team member winch itself secured frame high off ground order towline clear ground much possible turnaround pulley also staked high off ground order minimize line wear during winching retrieving operations motor Lucas M50 designed truck starter motor other picture winch shows Hi Im John Tatone let know am no longer affiliated TATONE PRODUCTS Corp will now manufacturing model engine accessories under new name JOHN TATONE COMPANY Items produced will similar have designed invented developed since 1956 now have available new generation Four Cycle engine mounts completely redesigned tailored specifically various engines mounts drilled tapped now fit engines perfectly Also two redesigned cast aluminum Engine Test Stands 1/2A 60 GIANT size engines 25 Wttnh fnr fur new nf incnwl mufflers German design motor Bosch product used starter Mercedes Benz 300 diesel Besides winchs simple straightforward design note line drum proportions fact 400 meters line already drum Its about two inches diameter about eight inches wide Compare Australian line drum about four inches wide six inches diameter advan tages German design smooth rapid accelerations during zoom part launch turnaround designs differed number teams competed Australia photos Xavier Heriard France compares French teams gimbal-mounted pulley American design French design allows pulley incline freely direction during launch Gary Ittner USA says know launch straight ahead can use shows off simplebut smoothversion used Mike Bame Mike Reagan As auto racing other high-tech sport some high-strung research makes life bit easier us downstream action same can said F3B its relation ship other types Soaring Well pass ideas future columns Good lift Dan Pruss 131 E Pennington Ln Plainfield IL 60S44 RC Scale/Wischers Continued page 47 section coordinates Obviously re quires help assistant two guiding calipers ends equally both sides fuselage graduations need used measurement After caliper has lifted fuselage merely measure across gap bracket tips read dimension directly carry short step ladders reach upper portions fuselage caliper clamped wing near its root cord can laid along beams upper surface stretched rearWE GIVE YOU CHOICE SCRATCH BUILD KIT BUILD OR SOMEWHERE IN-BETWEEN SCRATCH-A-PLANE offers finest engineered plans available complete fuil size tempiates part finest formed cowls canopies wheeipants heaviest practkai gauge ABS Butyrates now offers T-6 aluminum ianding gears prebent music wire landing gears cabanes v-struts plus complete wood paks AAA quality Balsa Aircraft grade & Lite-Piy Alaskan Sitka Spruce Apply templates supplied plan pak balsa plywood spend few hours cutting out parts hobby band saw construct finest flying easiest building kit youve ever owned K Rose offers 4 stroke performance dream about its optional flaps swept wing offers thrills experienced pilot yet docile enough trainer tVW 35 SCALE GLASAIR WING SPAN 80 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL CANOPY & WHEELPANTS $4495 CALL OR WRITE FOR COMPLETE LISTINGS AND PRICES OF DESIGNS AND ACCESSORIES SEE YOUR HOBBY SHOP OR ORDER DIRECT SHIPPING CHARGE S300 COD ORDERS ACCEPTED VISA & MASTERCHARGE WELCOME SCRATCH-A-PLANE 2060 ATHENS AVE REDOING CA 96004 916 241-4190 IF YOU CAN BUILD KIT YOU CAN BUILD SCRATCH-A-PLANE September 1985 119 NEW ITEMS AVAILABLE AT MOST HOBBY SHOPS IF NOT CONVENIENT ORDER DIRECT SEND SASE FOR FURTHER INFORMATION t4W 1/4 SCALE SHINGLETOWN ROSE WING SPAN 84 ENG 124 STROKE ROLLED PLAN PAK $2495 COWL FENDERS & WINDSHIELDS $3995 1/4 SCALE FOKKER DR-i WING SPAN 70 1/2 ENG 2 CU IN QUADRA ROLLED PLAN PAK $2495 COWL $1195 inEmEThe hinge allows control D tMIMU surface removal tools PATENTlost pins problems fr PENDINGcovering painting repair transportation storage etc Scale Appearance InsertSimple Assembly 3 SIZES No Slots No Pins Rotate 900 14-6 $335 3#8I6.# $445 1 26 d $495 ward stabilizer determine angular difference between wing stabilizer incidence angles cord also indicates angle wing incidence relative fuselage centerline stabilizer adjustable type make certain measurements made center its adjustment range Measuring along curved surfaces can bit tricky tape measure stretched along fuselage side ftom rear propeller tail post following curve resulting measurement will distorted too long Avoid false reading measuring first prop point fuselage choosing vertical line such engine cowl edge door measure line elevator hinge line stretching tape parallel fuselage center dimension elevator hinge tail post added obtain true fuselage length would diawn paper side view Actually long dimen sion along curved fuselage surface can used during model design con struction cross-check find length shown top view difference -scale model can much inch two airplane wide fuselage Building model prototype benefit three-view drawing prepared known reliable source can quite time-consuming have done past find several days can spent taking dimensions making photos During process placing lines paper later time invariably number gaps remaining missing information Secondor thirdtrips airport museum normal Photos good reminders shapes usually minimum value dimensions because distortion photo process airplane out doors camera can great distance airplane long tele photo lens can used produce rela tively distortion-free photos some assistance making working draw ings model building standard 35mm SLR camera lens should have focal length 135mm greater exposures made lens aimed squarely right angles fuselage side front top view nearly impossible camera really no substitute tape measure time spent gathering data Taking dimensions full-size air craft always done datum lines points Length dimensions fuselage made propellers rear surface prominent vertical line chosen convenience Dimensions features made measuring fore aft line Critical dimensions wing leading edge spar landing gear wheel centers Tapered wings can troublesome particularly no parallel lines leading edge trailing edge straight-through main wing spar delineated presence rivet rows external surfaces cord stretched tween tips will establish arbitrary line measure stretched cord along top longeron along prominent panel line will aid locating relationship between fuselage centerline propeller shaft Shaft loca tion thrust offsets difficult locate accurately elements can have profound effect flight well appearance Scale models Ex tend stretched cord forward plane propellers rotation measure distance floor Meas ure distance prop shaft cen terline floor difference between two dimensions can placed accurately models con struction drawings Most measurements full-scale air craft straightforward use steel tape always starting fixed reference points lines job can proceed quickly once basics begun sketch pad pencil using freehand technique will provide record later transposed accurate drawings freehand sketches can very crude rudimentary no need repro duce true shape part freehand stage dimensions 120 Model Aviation jj17j1ASSOCIATESINC OFEST CLOUD WAY ATO CA 94545 780-4868 OTIS SOLD MT SO Fokker TnDiane 4 Flight TestedContest Proven RhInebeck 84 Results CamelFirst lanosSecond Scale 2 gine 60 Send 51001w latest prIce list lIterature VK MODEL AIRCRAFT CO 5866 Transit Rd Depew NY 14043 716 684-5555 jiImm~ Hosted Indian City Radio Control Club 0 Raffle Ready Fly GPM 540 CAP- 21 Less Radio BY Great Planes Model Mt g Co Zenoah G 380 Engine World Engines K & B Super Poxy Finish BY K nufacturing Inc DETROIT EXPO VII Greater Michigan Modelers Show BenjamIn F Yack Recreation Center 3131 Third Street Wyandotte Michigan August 24 & 25 MANUFACTURERS STATIC DISPLAYS SWAP-SHOP CASH AWARDS OF SHOW FOR PLANES e BOATS S CARS S PLASTICS Auction C Refreshments e Free Parking Luedeman - 25505 Chernick Taylor Michigan 481~ Phone 31 3 295-0569 carry real importance Always look straight lines air craft structure Except nose cowlings tip outlines often surprising few curves found airplanes have seen three-view drawings showing curves fuselage outlines reali ty should have succession straight lines joined end end key feature sheet metal fuselages older airplanes aluminum formed direction few compound curves require costly tooling hand-working metal course exceptions Spit fire its curves comes mind modern aircraft also have extensive tooling complex shapes older types look straight lines curves exist often represent wooden string ers wood-former superstructure New publication specialty journal interest Scale modelers being launched 19 19-1939 Air Wars will carry information detailing aircraft perfor mance armament combat handling pilot reports wars between 1919 1939 will feature activities restorers replica-builders Scale modelers historians museums Issue No 1 includes articles 1936 Legion Condor Spain Waco military aircraft Fiat CR 32 Heinkel HE-S IA-l draw ings quarterly publication Write Air Wars 8931 Kittyhawk Ave Los Angeles CA 90045 Composites Greatest strength weight other exotic materials such Kevlar carbon fiber can dervied proper use commonly Used materials balsa plywood fiber Ilass past 10 years almost plywood models has lami nated two layers plywood ply plus balsa chief advantage other strength absence warping seems continual fault plywood use white glue very thin film tween layers sheet compressed between flat boards C-clamps Mini mum drying setting time warm condi tions hour after pressure can released part cut shape absolutely certain no later warping increase curing time eight hours Examples recent applications single bow frame canopy-support made 3 layers A2-in ply part cut sheet very narrow rim about A6-in square section 9-in wide has tremendous strength model should nose over tall grass negligible risk frac ture will easily support planes weight Fuselage bulkheads made laminating process two layers A-in %2-in ply can thinned out very narrow frame would equal weight ordinary balsa formersbut enormous strength comparison Laminating three layers two plywood balsa core affords light weight added rigidity resulting part has advantage greater thickness SAILPLANES WORLD iSOIA Cotfee Rd Modesto CA 95355 cementing surface fuselage bulkheads soft A-in balsa A-in ply faces ideal combina tion can used weight reduction structures large models process may seem wasteful because bulkhead center cut out scraps can used smaller parts fuselage aft end leftovers always used ever new lamination needed search through scrap box often waste time scraps long since absorbed another application External composites old standby fiberglass cloth laminated over balsa probably common combination Its weakness compression strength Air loads wing stabilizer will likely never great enough cause damage shock hard landing can cause compression fractures bottom sur faces Subsequent suddenly-applied loads due snap maneuvers change direc tion high speed could lead failure Once continuity glass fibers has lost no quick easy repair Using epoxy resin place polyester will increase strength 15% 20% Continued page 124 Sailplanes International Krause MultiPlex Wan itschek Wik & Roke Sport-Scale-F3B European Hardware Accessories Send $500 Cat & Price List 209 577-0506 September 1985 121 DODGSON DESIGNS WINDSONG CHOICE OF CHAMPIONS the top thermal contest flyers over country turining Windsong top competition glider answer simple want win Meet Bernie Coleman Charlotte NC Windsong Pictured trophies Bernies winning 1st place overall high score third annual SHM Contest Winston-Salem N C May 11th 12th 1985 May 25th 26th 1985 Bernie won 2-meter K- ow predecessor Pixy 5th Open Class Rebel C C Rally Windsong John Gunsallus won first overall Ed Berton won 4th Windsongs Jacksonville FL Jake Watkins won 1985 NW NSS regional contest both open class overall high score flying windsong Dave Johnson won dard class Camano Dodgson Designs planes finished 1st C through 8th class want win sten Champions song 19995Cauiano 15995Pixy 14995 2 stamps catalog $25 VHS video tape I SW CAMANO DRIVE CAMANO ISLAND WA 9829 RC Scale/Wischers Continued page 121 thicker balsa sheeting /32 in place A6 will provide additional safety fac tor though weakness exists fiberglass cloth remains best method building-in strength com posite construction because large area covered flight surfaces point discussion shouldnt feel fiberglass makes wing stabilizer invulnerable damage After hard landing look compres sion fracture across wing strength impaired cutouts retract able landing gear stabilizers lower surface line attached fuselage likely point fracture Obviously same points vulnera ble airplanes covered fiber glass cloth Airplanes come apart midair have seen number heard others probably history bad-landing damage before catastrophe Bob Dolly Wischer S-221 Lapham Peak Rd Delafield WI 53018 responding advertisers mention read about Model Aviation RC Aerobatics/Van Putte Continued page 49 US team likely have airplanes like Laser 200 Frackowiaks Challenger II Chidgeys Tar Baby Circus Hobbies Stevens Akromaster other large slow airplanes powered fourcycle 120 engines problem Well could problem US team Lets suppose am foreign judge used seeing fast groovy airplanes perform Turn around pattern am judge World Championships would judge US team entries rule book says maneuver graded 'smoothness gracefulness' slow four-cycle-powered airplanes will look smooth graceful two-cycle-powered cousins US team could really get clobbered foreign judges saving feature US team entries will will able stay box much easi ly two-cycle-engine powered en tries make up some ground keeping maneuvers plane height will allow seen clearly judges approximately 60 vertically 1200 horizontally will interesting World Championships Doug Dahlke Oshkosh WI calls EAA-ville wrote help out think letter part said few quick comments column June 1985 First comments about ukie conversions RC R VP sounds like talking about CL stuff 20 years ago may intent sug gested . horizontal tail area 20% 25% wing area.. will turn page 70 June 1985 issue Ted Fanchers column will see .the area stab elevator should normally between 20% 25% wing area has pret ty much standard decade ukie Stunt ships True elevator should reduced RC Also clear trend towards longer aft movement arms CL Stunters Perhaps quite full 3 3 times suggest newer stuff much better respect Well what can say Perhaps can hedge saying first powered air plane RC deBolt Kitten flew 1954I never flew CL airplane life way whats ukie Just kidding meantime may landings wheels down Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 124 Modei Aviation DUDGSON DESIGNS 2904 read about Model Aviation writing advertisers mention QUARTERSCALE SPAN 89 SCALE PLANS & NOTES $ 2995 PARTIAL KIT & PLANS $12500 BUILT UP TO ROUGH IT $50000 OS 61 8500 $11500 PIPER Thi-PACER PA-22 PAN SCALE 5 DH-85 LEOPARD MOTHE SPAN SCALE 5 642-84651 DH-8O russ MOThE SPAN SCALE 5