The experiment study weight build-up severai covering surface preparation techniqut. some can seen information presented provides added insight heip pick covering method modeis much weight various covering prepping materials add models 92 Model Aviation WHEN FINISHiNG MODEL weight added often Its con-method available intormation Indetermining whether project troll e dstead rely upon past experiences will successful flier possible to experi meni experiences RC colleagues ruin otherwise sound project poor show j u st howThese hands-on observations helpful choice finishing methodbut always accurate Weight often cited planning next model would principle reasons selecting methodbeneficial able estimate accurately material over another usually littlethe expected weight build-up method consideration given total addedversus another might give us greater weight comes balsa preparationversatility choice projects material priming Often reasons experiment possible make wise choice finishingdesigned accurately measure weight build-up various finishing techniques hoped data would provide basis comparing method other giving aeromodeler clearer perspective differences similari ties between several popular approaches thing must made clear before proceeding weight alone should factor selecting finishing method Strength durability type aircraft mod eled desired appearance time applica tion availability materials tools personal skill preference fluence decision experiment Five finishing materials selected silk aluminum MonoKote Super Coverite Micaflim glass cloth covering materials applied standard fashion Balsarite treatment balsa con ditions controlled experi mental laboratory silk purchased local fabric shop weight basis compared iden tically K&B silk Aluminum MonoKote Top Flite Models Super Coverite pre-primed Coverite Micafilm pur chased local hobby shop Two types glass cloth selected lightweight 06 oz/sq yd purchased Dan Par sons Products medium 15 02/sq yd Sig Manufacturing Co order make critical analytical com parisons 30 test sheets 1/16 balsa prepared measuring 5 x 4 21 sq test sheets labeled carefully weighed analytical balance sensitive milligram Mettler Analytical Balance addition three blank test sheets weighed throughout experiment treated other way blank balsa sheets served internal check control possible weight gain loss due humidity changes results experiment sum marized Table 1 principal methods finishing listed first column iron-on coverings two sub-groups analyzed no balsa prepara tion except sanding other Balsarite treatment second column lists weight build-up following Balsarite ap plication amounts 032 gm/21 sq about 1 oz total 60-size plane estimated 2100 sq total surface area silk-and-dope method balsa prepared three coats Sig balsa filler sanded between coat third column lists added weight application covering pre primed Micafilni added about 1 gm/test sheet up 35 oz/60-size plane difficulty working Micafilm because iron set too hot Adhesion much improved perfect after cool ing iron 2500F Balsarite improved adhesion shown Table 1 will add little final total weight about 1 oz Aluminum MonoKote surprisingly Continued page 175 Table 1 Weight Balsa Prep icaflim no Balsarite Balsarite030 Aluminum no Balsarite MonoKote Balsarite Super no Balsarite Coverite Balsarite Silk Dope Polyester Resin Glass 060 02/sq yd Cloth 15 ozIsq yd Various Finishing Techniques 1 Prime 098 128 156156 034157191 108024132 032108023163 346 452 550 674 466 575 047070060177624 Primary application 109 160 Cyanoacrylate Glass Cloth 15 02/sq yd195 Secondary application 039 045 052 067 200 272 039234 705 959 825 1 Data first four columns expressed grams gin value represents average three separate experimental determinations column records weight increase measured test sheet 5 x 4 121 sq 2 Projectedweight build-up expressed oz121 00 sq 2100 sq estimate total surface area 60-size plane estimate includes finishing steps through surface priming step Painting included ounce equals 2835 gin 3 Primex applied sanded 4 Clear dope applied sanded 5 Dupont lOOS gray primer applied sanded December 1985 93 Above Based test results author estimated weight increase 13 oz fibergiassing 1/5scaie Corsair Actual weight gained including primer 15 oz O6-oz cloth used sheeted surfaces Below Added wainht heavy fiber alassina techniqus enn excesiva Amuthnr ARUn 7am 10 fn h9 CoveringTotal wt Projected wt materialgainbuild-up2 m oz/21 OOsq 098 098 fuselage frame over plans After assembly dry smooth both sides sanding block add plywood doub lers Round off fuselage edges sandpaper except stabilizer will mounted Cut out desired engine weight mount modules sand Cut out tail parts cockpit dorsal fin wing flaps sand smooth Sand some taper flaps elevator desired Cover parts lightweight heatshrink material Japanese tissue clear dope could used covering will probably require maintenance Add color dope trim desired Final assembly begins wing-fuse lage intersection Slip outboard tip cleaning wing opening sandpaper stick required Slip wing off its centered position temporarily coat center section top bottom thoroughly white glue Slip wing back proper final position Force white glue voids Align wing properly apply thin CyA entire joint unit will strong enough handle Make fillet baking soda around leading edge wing both sides apply CyA Clean covering material sur faces joined install horizontal stabilizer fuselage being careful align wing As wing joint use white glue CyA baking soda/ CyA fillet Similarly install fin rudder Slip flap joiner wire through fuselage Drill flaps Cut slots hinges Install flap elevator hinges shown plans cer tain run pins through hinges make sure wont come out Install control horns Rig pushrod bellcrank next last outside hole flap hornand pushrod last hole flap horn elevator Check plans control surface deflec tions Balance model shown plans sensitive controls move center gravity CG rearward less sensitive move CG forward May flying days windy Weight/Poffenbarger Continued page 93 heavy retrospect non-metallic Mono Kote variety also should have tested According experiment square inch 60-size 2100 sq sur photo Stuecker taken Geophysical article appeared May1985 issue Model Aviation noticed reader wrote MA requesting information wind flier served asthe structural format forthe Geophysical simpleand innocentbeglnningscamethe end product theform article HOYHXDEAWAYIIOBBYHTDEAWAYHOB9YHIAWAYHOBBYHIDAWAY FAMOUS BRITISH DIESELS AEROMODELLER PLANS SPARES M/E PAw D/C 3rd PRINTING CATALOG - DIESEL HANDBOOK $350 pp HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 Ho00YHrOEAwAHO0BYHIDEAWAflIO0BY9IDEAWAYHOB0Y4IDEAW 3 December 1985 175 FIBERGLASS COWLS 70 cowls eelpants Sig Pica Top-Flite Jemco Nosen Pilot Staflord Radials Behrens Garmhausen W E Tech other kits plans One-piece laminated construction handlaid fiberglass strong hut lightweight Send SASE price list please inclpde names models interested parts call between DAM 0 PM EDT information COD ordering hope hear youl 703 890-6017 Dept MA St 1 Sex 530 Geedview VA 24095 PAC MODEL SUPPLY WrCAiV4 203 575-0916 Flight-Proven DesignsTemp 203 393-1990 Balsa Construction 5-6 lbs Cessna 15040 Powered 62Easy Construction 110-15 hrs Stable Fliers Mooney 40 Powered 62Scale Like Appearance Slow Flying Capabilities Cherokee 40 Powered 604955 ea plus $250 UPS Cherokee 1/3 ScaleContest Proveni 23 place Ken Barnes200 plus 800 shipping Cessna 15025 Powered 50 3S plus $250 UPS NEW Firemaster BIpe5667 lbs60 Powered 6995 llntroductory Pricel Coming Soon 60 Powered Pattern Ships MasterCard ers Invited Meier Sr Owner/Pres lie Perugini Assist TARBaby TRANSMITTER CASE /Especially Turn-around thisAn inexpensive rugged molded .L 850 sq 120 4 cyclecase protect expensive iW powered Ron Ohidgey designtransmitter both two stick smooth solid performersingle stick transmitters Brown Rib templates computerleather grain aluminum trim plotted Plans construc lion hints locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing br plug-in wings Included pair ol special slip-fit phenolic sockets build wing structure Now size models 78 dia x 2 $ 895 1 dies 2$ 995 1 dia x3- $1495 Gator RIO Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 aster SION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 13141 221-8803 MANUFACTURERS OF SPORT PATTERN STINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 RBIPE NEW WING MOUNTING SET wing mounting system developed Ron Chidgey last neal accurate stays tight Three nylon brackets screws machined wing blocks included -$695 See Dealer Order Direct Include $150 Per Item UPS Information latest engines prices CALL OR WRITE FOR FREE CATALOG VISA MaslerCard Accepted F 0 X MFG CO 5305 TOWSON AVE FORT SMITH AR 72901 501 646-1656 face plane covered aluminum MonoKote total add-on weight would 55 oz Super Coverite lighter expected though addition Balsarite prepration balsa brings very close aluminum MonoKote overal weight build-up Su per Coverite joy work compared other methods finishing recommendead primer Primex very light respect silk dope can seen lightness silk overcome heaviness filler balsa preparation clear dope used both appliction priming steps Fibergiassing performed poly ester resin thinned MEK methyl ethyl ketone applied soft brush Excess resin blotted tissue paper little no sanding needed approach Comparison 06 oz/sq yd 1 5-oz cloth shows medium-weight cloth absorbs considerably resin primer giving rise 25oz additional build-up over 06-oz cloth surprising discovery though fibergiassing did result greatly-increased weight build-up com pared other methods certainly due method resin applica tion very satisfactory highly recommended resin poured blotted thinned heavy resin resi due will accumulate sanding will difficult Recently application glass cloth cyanoacrylate CyA glues has recommended much lighter method Using CyA 1 5-oz cloth did result much weight saving however apparent gray primer could sanded off better because cloth weave less visible blot ted-resin technique CyA method re quires excellent ventilation lot skill avoid bumps thready problems however keep mind experi ment weight build-up critical comparison ease application finish ing techniques Perhaps striking result ex periment weight build-up finding YS ENGINES HATORI HEADERS TETTRA HARDWARE ATLANTA- OMEGA SEE YOUR LOCAL DEALER SEND $1 FOR CATALOG $6 FOR HEADER POSTER GOLDEN GATE HOBBIES POBox 123 San Bruno CA 94066 TEL 415 952-3045 1 76 Model Aviation GZP C 904 478-6745 Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft Pro Line U G 43 West Nine Mile Rd Pensacola FL 32514 ~~2 * A Futaba Distributor er Inquiries Welcome * great weight penalty pay fiberglassing particularly proper technique followed method thinning catalyzed resin MEK blotting excess resin before has cured has covered previous issues Model Aviation necessary apply heavy resin coat balsasheeted surfaces penalty paid added weight far exceeds minimal benefit added strength Furthermore O6-oz glass cloth quite sufficient surfacing planes Comparing fiberglassing technique Super Coverite example would predict finish fibergiassed plane would weigh 227% carry comparison step further suppose built 1/5-scale DeHavilland Beaver used Balsarite Super Coy erite Primex finishing tech niqueand found finish failed achieve aluminum-sheeted appearance desired planning strategy second model plane could estimate 227% increase weight finishing materials lightweight glass cloth approach se lected might easily accommodated Schlueter Free Flight Models 3508 Poinsettia Ave Manhattan Beach Ca 90266 0 C PACIFIC ACE 0 BLACK BULLET RTIAL KITS plans&printedwvod PACIFiC ACE BLACK BULLET 20332530$470 40$665 ADD $200 SHIPPING FOR EACH 1t03 KIT ORDERCA RES ADO RI TAX Dealer Inquiries Invited WELLI TOLP YOU NOT TO STAND IN FRONT O THT ENGJ-N NEW IMPROVED dUm Wiliat Medd macre wouli POW *US PatRol No Des ** WANDIT * ealers Ivxded, * -- 6 * -I *10 ft CORD * *WetorDry * Stick Abrasives * *A Keen Machine gives exceptional *sanding control 101 excellent finish *5995Basic vcI 1 fIat Wand 1 each0 *xlRgvts *o595Bxida Special rid 2 lIar 1 naIlrxand sand 5 vi K grits9 * *129Dalaxe eExdes 3 hat 2 haIl rxand wandS 1 baIt wands 10 xl9 *K grits9 *Additional Wands Abrasives availabie *C * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 uite Texas 751499 December 1985 177 Futaba JR GLOW PLUG TAP 14-32 E8 4WtR HARRY HIGLEY 8 SONS INC P o Box 532 GLENWOOD ILL 60425 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX K AMA Membership143 Academy Av Research Dev12 Ace Radio Control Airtronics2 Altech MarketingCover 3 Astro Flight86 ISA9 n Built Models132 W~t flistributors144 165 Productions178 Enterprises146 24 yandTools178 154 Products16 Model Imports10 Model & Hobby Expo133 aroIlna Taffinder170 Cheveron164 Model Supply168 LrIc178 Condor Trading Co161 Consumers Guide26 Coverite29 151 Cox Hobbies147 iation150 ngineering174 Designs146 Systems24 jtm uenard Model Products172 Larry Dodge Aero Inc178 Dougs Hobby Shop94-97 Du-Bro Products Inc149 FAI Model Supply150 y Inc4 ass Master175 Models152 ost Products152 MfgCo176 27 IEC fl.Products162 i rroducts160 aur MI. rroducts176 Geometron Co171 Carl Goldherg Models5 153 Hobbies176 Products98175 Great Planes88 Harry B Hlgley& Sons166177 Historic Aviation25 Hobby Barn134-135 Hobby Horn170 Hobby Hideaway175 Hobby Lobby155 Hobby World Imports152 Holleys Silent Flight30 Ikon Northwest Co162 Indy RC Sales Inc138-1 40 International Modeler Show53 Jeff Ia Corp174 Jomar51 JTec136 K&BMfg172 K&S Engineering160 KandWEnt160 Kin Craft166 Knights Air133166 Kustom Kraftsmanship8 L&L Model Products18 Leading Edge157 Lindsey Micro Products166 Lone Star Models45 M&W Models162 MACS Products160 Master Kit176 McDaniel RC Service144 Messers Quality Model152 Micro Mark6-7 Micro Model Engineering150 Midwest Products175 Model Engineering Norwalk10 Model Ignition12 Model Magic Products47 Model Products Corp148 Model Rectifier CorpCover 2 Morrill-ADC168 Mutchlers Hobbies158-159 NEPRO174 Nor-Ray Products Inc55 North Products178 Off Ground Models163 Ohio Superstar156 PAC Model Supply176 PK Products129 Pacer Technology17 Peck-Polymers172 Penn Valley Hobby Center156 Peripheral Systems Inc28 Pica Productsis Polks Hobby31130-131 RC Buyers Guide 18 RC Video Magazine 150 RJL Industries 142 RJM Systems 162 Radio South 177 Repla-tech Intl 178 Robbe Modelsport 179 RoushMfg 170 SR Batteries176 SachsbyTG173 St Croix Park Falls28 Satellite City145 SavOn Hobbies49 Schlueter Free Flight Models177 Shamrock Competition Imports165 Sheldons Hobby Shop30 Sig Mfg16 Simcoe RC Aircraft Co13 Slim Line Mufflers148 Southeastern Air Crafters162 Standale Aircraft132 Sullivan Products1169 RC Sweitzer Enterprises129 T&D Fiberglass Spec 144 Tatone Prod Co 86 Tidewater Hobby Enterprises 55 Toledo RC Exposition 142 Top Flight Models Inc 87 Tower Hobbies 167 US Alpina85 VK Model Aircraft142 WE Technical Services 8 Wandit Manufacturing 177 Williams Bros 86 Wilshire Model Center 26 Windsor Propeller 144 Wing Mfg 16 Workshop Concepts World Engines Zenith Aviation RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS plane such Beaver fact lighterweightweight regardless material meth building techniques constructing sec- Another obvious conclusion drawnod Sure Micafllm pre-primed ond model could compensate forfrom experiment finishingcase lighter fibergiassing 15the small increase finishing materialtechniques add comparable amounts ofContinued page 180 ATHES ING MACHINES INE SHOP SUPPLIES S Fe Avetlon Modeler BLUE~DGE MACHINERY AND_TOOLS INC I0 Call oII f,e i-ASO-072-ASeeRHPrHSHHUHAI WOE ef Ic WV 562353AMHH7 MHHH8HCUHrHrE POAoeS36-YHeoioaeeWV25526 legE $100 boHr 200 Pugeel SILICONE TUBING O2550 SMALL 1 062 dl 1 83 00 MED1002 dl 0400$9000600 LANGE 1 125 dl 0000 81125 *2000 US CAN POSTPAID DODGE AERO INC 10210 MannIng Ave N Stiliwater MN 55082 178 Model Aviation flIII Ill ow, 11V1119 110111 2hour spectacular helicopter exploration Breathtaking music Critically acclaimed Details FREE VHS BETA Beerger Productions 32I7lt7AeUh La. 07102 /02 O10224I * SCALE DOCUMENTATION * SCALE DRAWINQSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1985 INTERNATIONAL AIRPLANE CATALOG48500 MCKENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send S 100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 NEWSPACESA FUEL CONTAINER FISHENYHUrBUS o 73/8 highE 91/8 THNgh Rigid PHIyHIh$IHHH INCIHEIHE THIIIH9 pI 8120 pEg FOHUNHArE Leck THMNg Through Cup North Products PO Box 18415 cleveland Heights OH 44118 ULinL 93Super Drone$1275 RC Shoulder-wing sport flier spans 68 uses 45-60 engine No 494HABOOB$400 CL Very lightweight sport/stunter flies wind power alone can adapted 049- 1 5 Cu glow engines Spans 39 No 495FW-1 90$425 RC Hand-launched all-balsa scalelike sport flier 1 0-1 5 engine spans 331/4 Part Dogfight Duo Two RC channels No 496P47 Thunderbolt$425 RO Characteristics like FW-1 90 Part Dogfight Duo Spans 33% No 153Slilietto CL Stunt model McDonald winner 19761 9801 982 FAI World Champ $ 375 No 239Blue Birils AC Ken Willards formation plane 4-channel 18 power 375 No 262Crashmasler CL Crash-proot trainer two nizes1 5-30- 35-40-power$125 No 299Gee Bee Sr Sparisler AC 1-scale Haftke tsr 91 power Prototype span 3011 Two halt sheets Ne 302Mint P16 RC Sarpnlus 049 docted tan sport tiler tsr 2-channel Balsa wings tail fuse structure$275 No 3101930 Fleet Biplane AC Sport Scale tsr 35-48 4-channel Wingspan 56 % scale Two sheets -$625 No 314Drake B AC Ken Willards flying boat 3-channel 15-power Ply tram land remnoable gear -$375 No 326Taylor Cab AC Dnn Sinus Schoolyard-Scale 049s 2-3 channel Spans 50 -$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope soaring -$200 No 356Pieces FF Indoor Easy B Aubber-power contest-winner hy W Van Gorder . $100 No 386Laser 200 AC Sport Scale replica ot championship Aerobatic Ilier Uses 40 power 4-5 channel Two sheets -61075 No 398Gee Bee ll1 RC Hatikes latest 1-scale spans 75 weighs 15 lh tiles 90 larger Pour sheets no doc- 62225 No 414Elecliic Spaiky AC electric powered tan flier tsr 05 motor 3-channel AC scaled api 939 rubber-power fuonrite9850 No 422Scooter AC Two-Meter Sailplane has won Nuts event 1982 1983 plus other contests$550 No 426Chioa CApper ACFahuloos 74-in span Sport Scale flying bout tor four 10 size engines aod 4-channel Three sheetsno doc $2000 No 430Imoside AC Zippy little sporister 1 0-1 5 power 3-channel AC -$400 Na 433Waits Up AC Electric-powered glider tor 2-3 channelo 035 motor spanO 52 No 437Kioiisher CL Profile Carrier plane spans 40% uses 35 engine - - -$600 INe 438Croloer PF Embryo Endurance rubber-power tan ship has big-model characteristics -$200 Ne 440Cavaler AC Old-Timer like new design has hoge wing br slow easy flights Far 35 power 3 channels Two sheets- -61725 No 441Nil Wil PP Hot small lightweight competition ship 15 power designer Horn] Murphy-- 475 No 442Lazy Duck AC Big canard sport flier tsr %A-09 power 2 channels Uses toam board parts - -6650 No 444Firehoit AC pusher canard sporllpattern uses 40 pusher engine 4-channel Has swept forward foam wings - 650 N 0446Le Crale AC Electric-powered sport tlier fur 05 motors 3-channels Two nersions parasol cabin6550 No 447hA Miss America AC Old-Timer %A Texaco model tsr 049 glow 2-channels$650 No 452Gee Bee Z AC Ouarter-scale spans 71% uses 90 power Pour sheets - -$1600 No 453Smoothie Prntile CL Profile rendition Bob Palmers soper-Stunter early Pifties 35 power$550 Ne 454Sweel P-3D PF Neat stick and-tissue Outdoor Aubber P30-class model isa cootnot-winner -$200 No 456HiTech 2001 AC Oucted-fan futuristic-looking canard 25-size engines Built-up construction Three sheets- -91175 No 457Spectra AC hlectric-power 05 size motor uses 3 different wings spurt soaring aerobatics-6700 Na 458Dauntleun CL Profile Carrier 15-power events Two sheets -6575 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size eogine 4 channels6650 Na 461Tinter Barnstormer CL Famous unflapped Stunter late Porties Uses 35 engine -6650 Ne 462Pemilia P0 FF Jumbo guSher Scale WW Italian observation plane -$400 No 463Platykelmiothes VE AC %A Pylon racer uses life ply built-up structure fur strength lightness- - $ 475 Ne 465Blue Max AC Pan-fly sporluter 40-size engines spans 52 Lightweight structure - -$700 Ne 466Competitor CL Stuntertor 60 power has 650 sq wing area - -$575 Na 467Alco Sport FP Aubber Scale design woo 83 Nato f designer Don SrulI Wingspan 26 in-9250 Nn 468Smoother CL Stunter 29135 power Design based oo hybrid SinoothielNobler$675 No 469Don Kichot AC Sport Scale rendering Polish homebuilt pusher Spans 75 uses 40-size 4-cycle engine Foursheets $2075 No 470Stinker 9C Mid-wing sportoter uses 40145 four-stroke engine spans 50% tail-dragger -6650 No 473Tocane AC Sport scale turboprop trainer spans 66 uses 60175 engines Two sheets. No 474Pacer 15 FF Nordic A-i Towline Glider won 1983 World Champs - -$500 No 475Geophysical CL Slow Combat model uses geodetic wiog construction 36 engine Two-sheet plan has partspatterns - 0 No 476ManIa 250 PP competition Ak plane has manta-ray-shaped wing spans 43 - 00 No 477Maodailo CL Sport Stunter uses sport 15 engine spans 35 in- 25 No 478Buttercup AC Cute elfin sportoter uses micro 2-ch AC pulse-rudder Spans 27 020 035 power- -$300 No 479Four-Stroke Booster ftC SportlAerobatics uhip has 1 920s styling uses 90 4-stroke engine spans 8S 2 sheets$1100 No 480Bidiculoss CL Pabuloas competition Stunter has 550 sq wing area flies TO 0491051 spans 47% in$600 No 481Europa 9C Sailplane PAl competition has fiberglass fuselage faam wings wing flaps stabilator tail Spans 110 in$700 No 482GeldesA8er AC SportlAerobatic model looks like Golden Age sportster 60 engines spans 62 -6750 Ne 483COS Nawk Ultralight PP Outdoor Gas Scale plane ones CO-2 power spans 29 - 00 Ne 484Aerneca K AC Osarter-Scale 30s Iightplane spans 9 ft. uses 12 ca 2-cyl 4-stroke engine weighs 11 y lbThree sheets$1975 No 485Hawker Hooter CL Fun-scale British et fighter has 16%-in foam wing uses %A power- 75 No 486Miles-Atwood Special AC Sport-Scale Golden Age air racer uses 21 engine spans 45 in-- $825 No 487Cap 21 AC Scale Aerobatic plane 40-size engine spans 62 Two sheets- -$1000 Na 488MB-i PP Jumbo Aubber Scale 1920-era Thomas Morse Scout biplane spans 37 00 Ne 489Undertaker CL Poam-wisged Past Combat plane 36 engine spans either 45 47 in- - 00 No 490Weekender AC Low-wing sport flier 20-size 4-stroke engine spans 47% -6575 No 491yellow Peril CL Advanced trainer all-balsa spans 23 uses %A power6325 No 491 Circulator PP A-i Towline Glider spans silo uses fiberglass tail boom circle-tow mechanism - 6 250 Circle numbers plans wish order 193239262299302 326332358386398 426430433437438 442444446447452 456457458460461 465466467468469 474475476477478 481482483484485 488489490491492 310 414 440 453 462 470 479 486 493 314 422 441 454 463 473 480 487 494 495496 Plan price leciedos firSi class poslage US delivery Which Air Mail over 300 miles orders oulside Ihe US lease add $250 Air Mail $125 surface mail Make check money order payable US funds Model Aviation c/u AMA 1910 Samuel Morse tIn Reoton VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ NAME STREET CITY STATE ZIP oz glass cloth keep mind data expressing small percentage total weight aircraft hypothetical 60-size plane weighed 8 lb 128 oz finishing materials add-on weight would vary 35% Micaflim 75% 15-oz glass cloth total usually tolerable range model aircraft An important consideration based upon results application data next project course finish ing techniques will differ condi tions experiment probably sufficiently alter outcome signifi cantly applying data will need estimate total surface area aircraft covered apply estimate follows X Weight oz increase estimate W Observed weight oz experiment Estimated surface area plane WA 2100 Dont forget add both top bottom wing surface areas plus tail surfaces guess fuselage area calculation may help select method over another clear however weight alone important influencing factor selecting finishing method As stated before personal prference de sire special effect skill tools hand hope durability weather conditions under work influences experiment simply removes possible preconceptions about weight build-up aspect decision-making process Weight paint included experiment simply because would add too complexities design experiment wide variety paints available us should subject future experiment Basical ly however white paints heavy clear lightest Pigment adds weight paint can add ounces unsuspected manner will inter esting technically challenging criti cally compare two-part epoxies poly isothiocyanates lacquers enamels onepart epoxies poly-S Voisin/SruII Continued page 89 testing Add clay get center gravity CG point shown plans Adjust model turn wide circles against torque left left handed prop means forward rudder ailerons As canards little model can handle much power wish use larger motors can achieve exhilarating high-climbing flights would have taken Gabriels breath away 180 Model Aviation 0 0 csJ n 0 -00 O3 00 zoo m 050 0 s oo us 0 -to GO 90 flb 000 0 00 00 0000 oa 000 80 Old C 00 us 0 0000 00 0 000 Ci 0 00 00~ Os 0 J 0 E00 U Os 000 N coo Is
Edition: Model Aviation - 1985/12
Page Numbers: 92, 93, 175, 176, 177, 178, 180
The experiment study weight build-up severai covering surface preparation techniqut. some can seen information presented provides added insight heip pick covering method modeis much weight various covering prepping materials add models 92 Model Aviation WHEN FINISHiNG MODEL weight added often Its con-method available intormation Indetermining whether project troll e dstead rely upon past experiences will successful flier possible to experi meni experiences RC colleagues ruin otherwise sound project poor show j u st howThese hands-on observations helpful choice finishing methodbut always accurate Weight often cited planning next model would principle reasons selecting methodbeneficial able estimate accurately material over another usually littlethe expected weight build-up method consideration given total addedversus another might give us greater weight comes balsa preparationversatility choice projects material priming Often reasons experiment possible make wise choice finishingdesigned accurately measure weight build-up various finishing techniques hoped data would provide basis comparing method other giving aeromodeler clearer perspective differences similari ties between several popular approaches thing must made clear before proceeding weight alone should factor selecting finishing method Strength durability type aircraft mod eled desired appearance time applica tion availability materials tools personal skill preference fluence decision experiment Five finishing materials selected silk aluminum MonoKote Super Coverite Micaflim glass cloth covering materials applied standard fashion Balsarite treatment balsa con ditions controlled experi mental laboratory silk purchased local fabric shop weight basis compared iden tically K&B silk Aluminum MonoKote Top Flite Models Super Coverite pre-primed Coverite Micafilm pur chased local hobby shop Two types glass cloth selected lightweight 06 oz/sq yd purchased Dan Par sons Products medium 15 02/sq yd Sig Manufacturing Co order make critical analytical com parisons 30 test sheets 1/16 balsa prepared measuring 5 x 4 21 sq test sheets labeled carefully weighed analytical balance sensitive milligram Mettler Analytical Balance addition three blank test sheets weighed throughout experiment treated other way blank balsa sheets served internal check control possible weight gain loss due humidity changes results experiment sum marized Table 1 principal methods finishing listed first column iron-on coverings two sub-groups analyzed no balsa prepara tion except sanding other Balsarite treatment second column lists weight build-up following Balsarite ap plication amounts 032 gm/21 sq about 1 oz total 60-size plane estimated 2100 sq total surface area silk-and-dope method balsa prepared three coats Sig balsa filler sanded between coat third column lists added weight application covering pre primed Micafilni added about 1 gm/test sheet up 35 oz/60-size plane difficulty working Micafilm because iron set too hot Adhesion much improved perfect after cool ing iron 2500F Balsarite improved adhesion shown Table 1 will add little final total weight about 1 oz Aluminum MonoKote surprisingly Continued page 175 Table 1 Weight Balsa Prep icaflim no Balsarite Balsarite030 Aluminum no Balsarite MonoKote Balsarite Super no Balsarite Coverite Balsarite Silk Dope Polyester Resin Glass 060 02/sq yd Cloth 15 ozIsq yd Various Finishing Techniques 1 Prime 098 128 156156 034157191 108024132 032108023163 346 452 550 674 466 575 047070060177624 Primary application 109 160 Cyanoacrylate Glass Cloth 15 02/sq yd195 Secondary application 039 045 052 067 200 272 039234 705 959 825 1 Data first four columns expressed grams gin value represents average three separate experimental determinations column records weight increase measured test sheet 5 x 4 121 sq 2 Projectedweight build-up expressed oz121 00 sq 2100 sq estimate total surface area 60-size plane estimate includes finishing steps through surface priming step Painting included ounce equals 2835 gin 3 Primex applied sanded 4 Clear dope applied sanded 5 Dupont lOOS gray primer applied sanded December 1985 93 Above Based test results author estimated weight increase 13 oz fibergiassing 1/5scaie Corsair Actual weight gained including primer 15 oz O6-oz cloth used sheeted surfaces Below Added wainht heavy fiber alassina techniqus enn excesiva Amuthnr ARUn 7am 10 fn h9 CoveringTotal wt Projected wt materialgainbuild-up2 m oz/21 OOsq 098 098 fuselage frame over plans After assembly dry smooth both sides sanding block add plywood doub lers Round off fuselage edges sandpaper except stabilizer will mounted Cut out desired engine weight mount modules sand Cut out tail parts cockpit dorsal fin wing flaps sand smooth Sand some taper flaps elevator desired Cover parts lightweight heatshrink material Japanese tissue clear dope could used covering will probably require maintenance Add color dope trim desired Final assembly begins wing-fuse lage intersection Slip outboard tip cleaning wing opening sandpaper stick required Slip wing off its centered position temporarily coat center section top bottom thoroughly white glue Slip wing back proper final position Force white glue voids Align wing properly apply thin CyA entire joint unit will strong enough handle Make fillet baking soda around leading edge wing both sides apply CyA Clean covering material sur faces joined install horizontal stabilizer fuselage being careful align wing As wing joint use white glue CyA baking soda/ CyA fillet Similarly install fin rudder Slip flap joiner wire through fuselage Drill flaps Cut slots hinges Install flap elevator hinges shown plans cer tain run pins through hinges make sure wont come out Install control horns Rig pushrod bellcrank next last outside hole flap hornand pushrod last hole flap horn elevator Check plans control surface deflec tions Balance model shown plans sensitive controls move center gravity CG rearward less sensitive move CG forward May flying days windy Weight/Poffenbarger Continued page 93 heavy retrospect non-metallic Mono Kote variety also should have tested According experiment square inch 60-size 2100 sq sur photo Stuecker taken Geophysical article appeared May1985 issue Model Aviation noticed reader wrote MA requesting information wind flier served asthe structural format forthe Geophysical simpleand innocentbeglnningscamethe end product theform article HOYHXDEAWAYIIOBBYHTDEAWAYHOB9YHIAWAYHOBBYHIDAWAY FAMOUS BRITISH DIESELS AEROMODELLER PLANS SPARES M/E PAw D/C 3rd PRINTING CATALOG - DIESEL HANDBOOK $350 pp HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 Ho00YHrOEAwAHO0BYHIDEAWAflIO0BY9IDEAWAYHOB0Y4IDEAW 3 December 1985 175 FIBERGLASS COWLS 70 cowls eelpants Sig Pica Top-Flite Jemco Nosen Pilot Staflord Radials Behrens Garmhausen W E Tech other kits plans One-piece laminated construction handlaid fiberglass strong hut lightweight Send SASE price list please inclpde names models interested parts call between DAM 0 PM EDT information COD ordering hope hear youl 703 890-6017 Dept MA St 1 Sex 530 Geedview VA 24095 PAC MODEL SUPPLY WrCAiV4 203 575-0916 Flight-Proven DesignsTemp 203 393-1990 Balsa Construction 5-6 lbs Cessna 15040 Powered 62Easy Construction 110-15 hrs Stable Fliers Mooney 40 Powered 62Scale Like Appearance Slow Flying Capabilities Cherokee 40 Powered 604955 ea plus $250 UPS Cherokee 1/3 ScaleContest Proveni 23 place Ken Barnes200 plus 800 shipping Cessna 15025 Powered 50 3S plus $250 UPS NEW Firemaster BIpe5667 lbs60 Powered 6995 llntroductory Pricel Coming Soon 60 Powered Pattern Ships MasterCard ers Invited Meier Sr Owner/Pres lie Perugini Assist TARBaby TRANSMITTER CASE /Especially Turn-around thisAn inexpensive rugged molded .L 850 sq 120 4 cyclecase protect expensive iW powered Ron Ohidgey designtransmitter both two stick smooth solid performersingle stick transmitters Brown Rib templates computerleather grain aluminum trim plotted Plans construc lion hints locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing br plug-in wings Included pair ol special slip-fit phenolic sockets build wing structure Now size models 78 dia x 2 $ 895 1 dies 2$ 995 1 dia x3- $1495 Gator RIO Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 aster SION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 13141 221-8803 MANUFACTURERS OF SPORT PATTERN STINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 RBIPE NEW WING MOUNTING SET wing mounting system developed Ron Chidgey last neal accurate stays tight Three nylon brackets screws machined wing blocks included -$695 See Dealer Order Direct Include $150 Per Item UPS Information latest engines prices CALL OR WRITE FOR FREE CATALOG VISA MaslerCard Accepted F 0 X MFG CO 5305 TOWSON AVE FORT SMITH AR 72901 501 646-1656 face plane covered aluminum MonoKote total add-on weight would 55 oz Super Coverite lighter expected though addition Balsarite prepration balsa brings very close aluminum MonoKote overal weight build-up Su per Coverite joy work compared other methods finishing recommendead primer Primex very light respect silk dope can seen lightness silk overcome heaviness filler balsa preparation clear dope used both appliction priming steps Fibergiassing performed poly ester resin thinned MEK methyl ethyl ketone applied soft brush Excess resin blotted tissue paper little no sanding needed approach Comparison 06 oz/sq yd 1 5-oz cloth shows medium-weight cloth absorbs considerably resin primer giving rise 25oz additional build-up over 06-oz cloth surprising discovery though fibergiassing did result greatly-increased weight build-up com pared other methods certainly due method resin applica tion very satisfactory highly recommended resin poured blotted thinned heavy resin resi due will accumulate sanding will difficult Recently application glass cloth cyanoacrylate CyA glues has recommended much lighter method Using CyA 1 5-oz cloth did result much weight saving however apparent gray primer could sanded off better because cloth weave less visible blot ted-resin technique CyA method re quires excellent ventilation lot skill avoid bumps thready problems however keep mind experi ment weight build-up critical comparison ease application finish ing techniques Perhaps striking result ex periment weight build-up finding YS ENGINES HATORI HEADERS TETTRA HARDWARE ATLANTA- OMEGA SEE YOUR LOCAL DEALER SEND $1 FOR CATALOG $6 FOR HEADER POSTER GOLDEN GATE HOBBIES POBox 123 San Bruno CA 94066 TEL 415 952-3045 1 76 Model Aviation GZP C 904 478-6745 Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft Pro Line U G 43 West Nine Mile Rd Pensacola FL 32514 ~~2 * A Futaba Distributor er Inquiries Welcome * great weight penalty pay fiberglassing particularly proper technique followed method thinning catalyzed resin MEK blotting excess resin before has cured has covered previous issues Model Aviation necessary apply heavy resin coat balsasheeted surfaces penalty paid added weight far exceeds minimal benefit added strength Furthermore O6-oz glass cloth quite sufficient surfacing planes Comparing fiberglassing technique Super Coverite example would predict finish fibergiassed plane would weigh 227% carry comparison step further suppose built 1/5-scale DeHavilland Beaver used Balsarite Super Coy erite Primex finishing tech niqueand found finish failed achieve aluminum-sheeted appearance desired planning strategy second model plane could estimate 227% increase weight finishing materials lightweight glass cloth approach se lected might easily accommodated Schlueter Free Flight Models 3508 Poinsettia Ave Manhattan Beach Ca 90266 0 C PACIFIC ACE 0 BLACK BULLET RTIAL KITS plans&printedwvod PACIFiC ACE BLACK BULLET 20332530$470 40$665 ADD $200 SHIPPING FOR EACH 1t03 KIT ORDERCA RES ADO RI TAX Dealer Inquiries Invited WELLI TOLP YOU NOT TO STAND IN FRONT O THT ENGJ-N NEW IMPROVED dUm Wiliat Medd macre wouli POW *US PatRol No Des ** WANDIT * ealers Ivxded, * -- 6 * -I *10 ft CORD * *WetorDry * Stick Abrasives * *A Keen Machine gives exceptional *sanding control 101 excellent finish *5995Basic vcI 1 fIat Wand 1 each0 *xlRgvts *o595Bxida Special rid 2 lIar 1 naIlrxand sand 5 vi K grits9 * *129Dalaxe eExdes 3 hat 2 haIl rxand wandS 1 baIt wands 10 xl9 *K grits9 *Additional Wands Abrasives availabie *C * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 uite Texas 751499 December 1985 177 Futaba JR GLOW PLUG TAP 14-32 E8 4WtR HARRY HIGLEY 8 SONS INC P o Box 532 GLENWOOD ILL 60425 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX K AMA Membership143 Academy Av Research Dev12 Ace Radio Control Airtronics2 Altech MarketingCover 3 Astro Flight86 ISA9 n Built Models132 W~t flistributors144 165 Productions178 Enterprises146 24 yandTools178 154 Products16 Model Imports10 Model & Hobby Expo133 aroIlna Taffinder170 Cheveron164 Model Supply168 LrIc178 Condor Trading Co161 Consumers Guide26 Coverite29 151 Cox Hobbies147 iation150 ngineering174 Designs146 Systems24 jtm uenard Model Products172 Larry Dodge Aero Inc178 Dougs Hobby Shop94-97 Du-Bro Products Inc149 FAI Model Supply150 y Inc4 ass Master175 Models152 ost Products152 MfgCo176 27 IEC fl.Products162 i rroducts160 aur MI. rroducts176 Geometron Co171 Carl Goldherg Models5 153 Hobbies176 Products98175 Great Planes88 Harry B Hlgley& Sons166177 Historic Aviation25 Hobby Barn134-135 Hobby Horn170 Hobby Hideaway175 Hobby Lobby155 Hobby World Imports152 Holleys Silent Flight30 Ikon Northwest Co162 Indy RC Sales Inc138-1 40 International Modeler Show53 Jeff Ia Corp174 Jomar51 JTec136 K&BMfg172 K&S Engineering160 KandWEnt160 Kin Craft166 Knights Air133166 Kustom Kraftsmanship8 L&L Model Products18 Leading Edge157 Lindsey Micro Products166 Lone Star Models45 M&W Models162 MACS Products160 Master Kit176 McDaniel RC Service144 Messers Quality Model152 Micro Mark6-7 Micro Model Engineering150 Midwest Products175 Model Engineering Norwalk10 Model Ignition12 Model Magic Products47 Model Products Corp148 Model Rectifier CorpCover 2 Morrill-ADC168 Mutchlers Hobbies158-159 NEPRO174 Nor-Ray Products Inc55 North Products178 Off Ground Models163 Ohio Superstar156 PAC Model Supply176 PK Products129 Pacer Technology17 Peck-Polymers172 Penn Valley Hobby Center156 Peripheral Systems Inc28 Pica Productsis Polks Hobby31130-131 RC Buyers Guide 18 RC Video Magazine 150 RJL Industries 142 RJM Systems 162 Radio South 177 Repla-tech Intl 178 Robbe Modelsport 179 RoushMfg 170 SR Batteries176 SachsbyTG173 St Croix Park Falls28 Satellite City145 SavOn Hobbies49 Schlueter Free Flight Models177 Shamrock Competition Imports165 Sheldons Hobby Shop30 Sig Mfg16 Simcoe RC Aircraft Co13 Slim Line Mufflers148 Southeastern Air Crafters162 Standale Aircraft132 Sullivan Products1169 RC Sweitzer Enterprises129 T&D Fiberglass Spec 144 Tatone Prod Co 86 Tidewater Hobby Enterprises 55 Toledo RC Exposition 142 Top Flight Models Inc 87 Tower Hobbies 167 US Alpina85 VK Model Aircraft142 WE Technical Services 8 Wandit Manufacturing 177 Williams Bros 86 Wilshire Model Center 26 Windsor Propeller 144 Wing Mfg 16 Workshop Concepts World Engines Zenith Aviation RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS plane such Beaver fact lighterweightweight regardless material meth building techniques constructing sec- Another obvious conclusion drawnod Sure Micafllm pre-primed ond model could compensate forfrom experiment finishingcase lighter fibergiassing 15the small increase finishing materialtechniques add comparable amounts ofContinued page 180 ATHES ING MACHINES INE SHOP SUPPLIES S Fe Avetlon Modeler BLUE~DGE MACHINERY AND_TOOLS INC I0 Call oII f,e i-ASO-072-ASeeRHPrHSHHUHAI WOE ef Ic WV 562353AMHH7 MHHH8HCUHrHrE POAoeS36-YHeoioaeeWV25526 legE $100 boHr 200 Pugeel SILICONE TUBING O2550 SMALL 1 062 dl 1 83 00 MED1002 dl 0400$9000600 LANGE 1 125 dl 0000 81125 *2000 US CAN POSTPAID DODGE AERO INC 10210 MannIng Ave N Stiliwater MN 55082 178 Model Aviation flIII Ill ow, 11V1119 110111 2hour spectacular helicopter exploration Breathtaking music Critically acclaimed Details FREE VHS BETA Beerger Productions 32I7lt7AeUh La. 07102 /02 O10224I * SCALE DOCUMENTATION * SCALE DRAWINQSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1985 INTERNATIONAL AIRPLANE CATALOG48500 MCKENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send S 100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 NEWSPACESA FUEL CONTAINER FISHENYHUrBUS o 73/8 highE 91/8 THNgh Rigid PHIyHIh$IHHH INCIHEIHE THIIIH9 pI 8120 pEg FOHUNHArE Leck THMNg Through Cup North Products PO Box 18415 cleveland Heights OH 44118 ULinL 93Super Drone$1275 RC Shoulder-wing sport flier spans 68 uses 45-60 engine No 494HABOOB$400 CL Very lightweight sport/stunter flies wind power alone can adapted 049- 1 5 Cu glow engines Spans 39 No 495FW-1 90$425 RC Hand-launched all-balsa scalelike sport flier 1 0-1 5 engine spans 331/4 Part Dogfight Duo Two RC channels No 496P47 Thunderbolt$425 RO Characteristics like FW-1 90 Part Dogfight Duo Spans 33% No 153Slilietto CL Stunt model McDonald winner 19761 9801 982 FAI World Champ $ 375 No 239Blue Birils AC Ken Willards formation plane 4-channel 18 power 375 No 262Crashmasler CL Crash-proot trainer two nizes1 5-30- 35-40-power$125 No 299Gee Bee Sr Sparisler AC 1-scale Haftke tsr 91 power Prototype span 3011 Two halt sheets Ne 302Mint P16 RC Sarpnlus 049 docted tan sport tiler tsr 2-channel Balsa wings tail fuse structure$275 No 3101930 Fleet Biplane AC Sport Scale tsr 35-48 4-channel Wingspan 56 % scale Two sheets -$625 No 314Drake B AC Ken Willards flying boat 3-channel 15-power Ply tram land remnoable gear -$375 No 326Taylor Cab AC Dnn Sinus Schoolyard-Scale 049s 2-3 channel Spans 50 -$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope soaring -$200 No 356Pieces FF Indoor Easy B Aubber-power contest-winner hy W Van Gorder . $100 No 386Laser 200 AC Sport Scale replica ot championship Aerobatic Ilier Uses 40 power 4-5 channel Two sheets -61075 No 398Gee Bee ll1 RC Hatikes latest 1-scale spans 75 weighs 15 lh tiles 90 larger Pour sheets no doc- 62225 No 414Elecliic Spaiky AC electric powered tan flier tsr 05 motor 3-channel AC scaled api 939 rubber-power fuonrite9850 No 422Scooter AC Two-Meter Sailplane has won Nuts event 1982 1983 plus other contests$550 No 426Chioa CApper ACFahuloos 74-in span Sport Scale flying bout tor four 10 size engines aod 4-channel Three sheetsno doc $2000 No 430Imoside AC Zippy little sporister 1 0-1 5 power 3-channel AC -$400 Na 433Waits Up AC Electric-powered glider tor 2-3 channelo 035 motor spanO 52 No 437Kioiisher CL Profile Carrier plane spans 40% uses 35 engine - - -$600 INe 438Croloer PF Embryo Endurance rubber-power tan ship has big-model characteristics -$200 Ne 440Cavaler AC Old-Timer like new design has hoge wing br slow easy flights Far 35 power 3 channels Two sheets- -61725 No 441Nil Wil PP Hot small lightweight competition ship 15 power designer Horn] Murphy-- 475 No 442Lazy Duck AC Big canard sport flier tsr %A-09 power 2 channels Uses toam board parts - -6650 No 444Firehoit AC pusher canard sporllpattern uses 40 pusher engine 4-channel Has swept forward foam wings - 650 N 0446Le Crale AC Electric-powered sport tlier fur 05 motors 3-channels Two nersions parasol cabin6550 No 447hA Miss America AC Old-Timer %A Texaco model tsr 049 glow 2-channels$650 No 452Gee Bee Z AC Ouarter-scale spans 71% uses 90 power Pour sheets - -$1600 No 453Smoothie Prntile CL Profile rendition Bob Palmers soper-Stunter early Pifties 35 power$550 Ne 454Sweel P-3D PF Neat stick and-tissue Outdoor Aubber P30-class model isa cootnot-winner -$200 No 456HiTech 2001 AC Oucted-fan futuristic-looking canard 25-size engines Built-up construction Three sheets- -91175 No 457Spectra AC hlectric-power 05 size motor uses 3 different wings spurt soaring aerobatics-6700 Na 458Dauntleun CL Profile Carrier 15-power events Two sheets -6575 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size eogine 4 channels6650 Na 461Tinter Barnstormer CL Famous unflapped Stunter late Porties Uses 35 engine -6650 Ne 462Pemilia P0 FF Jumbo guSher Scale WW Italian observation plane -$400 No 463Platykelmiothes VE AC %A Pylon racer uses life ply built-up structure fur strength lightness- - $ 475 Ne 465Blue Max AC Pan-fly sporluter 40-size engines spans 52 Lightweight structure - -$700 Ne 466Competitor CL Stuntertor 60 power has 650 sq wing area - -$575 Na 467Alco Sport FP Aubber Scale design woo 83 Nato f designer Don SrulI Wingspan 26 in-9250 Nn 468Smoother CL Stunter 29135 power Design based oo hybrid SinoothielNobler$675 No 469Don Kichot AC Sport Scale rendering Polish homebuilt pusher Spans 75 uses 40-size 4-cycle engine Foursheets $2075 No 470Stinker 9C Mid-wing sportoter uses 40145 four-stroke engine spans 50% tail-dragger -6650 No 473Tocane AC Sport scale turboprop trainer spans 66 uses 60175 engines Two sheets. No 474Pacer 15 FF Nordic A-i Towline Glider won 1983 World Champs - -$500 No 475Geophysical CL Slow Combat model uses geodetic wiog construction 36 engine Two-sheet plan has partspatterns - 0 No 476ManIa 250 PP competition Ak plane has manta-ray-shaped wing spans 43 - 00 No 477Maodailo CL Sport Stunter uses sport 15 engine spans 35 in- 25 No 478Buttercup AC Cute elfin sportoter uses micro 2-ch AC pulse-rudder Spans 27 020 035 power- -$300 No 479Four-Stroke Booster ftC SportlAerobatics uhip has 1 920s styling uses 90 4-stroke engine spans 8S 2 sheets$1100 No 480Bidiculoss CL Pabuloas competition Stunter has 550 sq wing area flies TO 0491051 spans 47% in$600 No 481Europa 9C Sailplane PAl competition has fiberglass fuselage faam wings wing flaps stabilator tail Spans 110 in$700 No 482GeldesA8er AC SportlAerobatic model looks like Golden Age sportster 60 engines spans 62 -6750 Ne 483COS Nawk Ultralight PP Outdoor Gas Scale plane ones CO-2 power spans 29 - 00 Ne 484Aerneca K AC Osarter-Scale 30s Iightplane spans 9 ft. uses 12 ca 2-cyl 4-stroke engine weighs 11 y lbThree sheets$1975 No 485Hawker Hooter CL Fun-scale British et fighter has 16%-in foam wing uses %A power- 75 No 486Miles-Atwood Special AC Sport-Scale Golden Age air racer uses 21 engine spans 45 in-- $825 No 487Cap 21 AC Scale Aerobatic plane 40-size engine spans 62 Two sheets- -$1000 Na 488MB-i PP Jumbo Aubber Scale 1920-era Thomas Morse Scout biplane spans 37 00 Ne 489Undertaker CL Poam-wisged Past Combat plane 36 engine spans either 45 47 in- - 00 No 490Weekender AC Low-wing sport flier 20-size 4-stroke engine spans 47% -6575 No 491yellow Peril CL Advanced trainer all-balsa spans 23 uses %A power6325 No 491 Circulator PP A-i Towline Glider spans silo uses fiberglass tail boom circle-tow mechanism - 6 250 Circle numbers plans wish order 193239262299302 326332358386398 426430433437438 442444446447452 456457458460461 465466467468469 474475476477478 481482483484485 488489490491492 310 414 440 453 462 470 479 486 493 314 422 441 454 463 473 480 487 494 495496 Plan price leciedos firSi class poslage US delivery Which Air Mail over 300 miles orders oulside Ihe US lease add $250 Air Mail $125 surface mail Make check money order payable US funds Model Aviation c/u AMA 1910 Samuel Morse tIn Reoton VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ NAME STREET CITY STATE ZIP oz glass cloth keep mind data expressing small percentage total weight aircraft hypothetical 60-size plane weighed 8 lb 128 oz finishing materials add-on weight would vary 35% Micaflim 75% 15-oz glass cloth total usually tolerable range model aircraft An important consideration based upon results application data next project course finish ing techniques will differ condi tions experiment probably sufficiently alter outcome signifi cantly applying data will need estimate total surface area aircraft covered apply estimate follows X Weight oz increase estimate W Observed weight oz experiment Estimated surface area plane WA 2100 Dont forget add both top bottom wing surface areas plus tail surfaces guess fuselage area calculation may help select method over another clear however weight alone important influencing factor selecting finishing method As stated before personal prference de sire special effect skill tools hand hope durability weather conditions under work influences experiment simply removes possible preconceptions about weight build-up aspect decision-making process Weight paint included experiment simply because would add too complexities design experiment wide variety paints available us should subject future experiment Basical ly however white paints heavy clear lightest Pigment adds weight paint can add ounces unsuspected manner will inter esting technically challenging criti cally compare two-part epoxies poly isothiocyanates lacquers enamels onepart epoxies poly-S Voisin/SruII Continued page 89 testing Add clay get center gravity CG point shown plans Adjust model turn wide circles against torque left left handed prop means forward rudder ailerons As canards little model can handle much power wish use larger motors can achieve exhilarating high-climbing flights would have taken Gabriels breath away 180 Model Aviation 0 0 csJ n 0 -00 O3 00 zoo m 050 0 s oo us 0 -to GO 90 flb 000 0 00 00 0000 oa 000 80 Old C 00 us 0 0000 00 0 000 Ci 0 00 00~ Os 0 J 0 E00 U Os 000 N coo Is
Edition: Model Aviation - 1985/12
Page Numbers: 92, 93, 175, 176, 177, 178, 180
The experiment study weight build-up severai covering surface preparation techniqut. some can seen information presented provides added insight heip pick covering method modeis much weight various covering prepping materials add models 92 Model Aviation WHEN FINISHiNG MODEL weight added often Its con-method available intormation Indetermining whether project troll e dstead rely upon past experiences will successful flier possible to experi meni experiences RC colleagues ruin otherwise sound project poor show j u st howThese hands-on observations helpful choice finishing methodbut always accurate Weight often cited planning next model would principle reasons selecting methodbeneficial able estimate accurately material over another usually littlethe expected weight build-up method consideration given total addedversus another might give us greater weight comes balsa preparationversatility choice projects material priming Often reasons experiment possible make wise choice finishingdesigned accurately measure weight build-up various finishing techniques hoped data would provide basis comparing method other giving aeromodeler clearer perspective differences similari ties between several popular approaches thing must made clear before proceeding weight alone should factor selecting finishing method Strength durability type aircraft mod eled desired appearance time applica tion availability materials tools personal skill preference fluence decision experiment Five finishing materials selected silk aluminum MonoKote Super Coverite Micaflim glass cloth covering materials applied standard fashion Balsarite treatment balsa con ditions controlled experi mental laboratory silk purchased local fabric shop weight basis compared iden tically K&B silk Aluminum MonoKote Top Flite Models Super Coverite pre-primed Coverite Micafilm pur chased local hobby shop Two types glass cloth selected lightweight 06 oz/sq yd purchased Dan Par sons Products medium 15 02/sq yd Sig Manufacturing Co order make critical analytical com parisons 30 test sheets 1/16 balsa prepared measuring 5 x 4 21 sq test sheets labeled carefully weighed analytical balance sensitive milligram Mettler Analytical Balance addition three blank test sheets weighed throughout experiment treated other way blank balsa sheets served internal check control possible weight gain loss due humidity changes results experiment sum marized Table 1 principal methods finishing listed first column iron-on coverings two sub-groups analyzed no balsa prepara tion except sanding other Balsarite treatment second column lists weight build-up following Balsarite ap plication amounts 032 gm/21 sq about 1 oz total 60-size plane estimated 2100 sq total surface area silk-and-dope method balsa prepared three coats Sig balsa filler sanded between coat third column lists added weight application covering pre primed Micafilni added about 1 gm/test sheet up 35 oz/60-size plane difficulty working Micafilm because iron set too hot Adhesion much improved perfect after cool ing iron 2500F Balsarite improved adhesion shown Table 1 will add little final total weight about 1 oz Aluminum MonoKote surprisingly Continued page 175 Table 1 Weight Balsa Prep icaflim no Balsarite Balsarite030 Aluminum no Balsarite MonoKote Balsarite Super no Balsarite Coverite Balsarite Silk Dope Polyester Resin Glass 060 02/sq yd Cloth 15 ozIsq yd Various Finishing Techniques 1 Prime 098 128 156156 034157191 108024132 032108023163 346 452 550 674 466 575 047070060177624 Primary application 109 160 Cyanoacrylate Glass Cloth 15 02/sq yd195 Secondary application 039 045 052 067 200 272 039234 705 959 825 1 Data first four columns expressed grams gin value represents average three separate experimental determinations column records weight increase measured test sheet 5 x 4 121 sq 2 Projectedweight build-up expressed oz121 00 sq 2100 sq estimate total surface area 60-size plane estimate includes finishing steps through surface priming step Painting included ounce equals 2835 gin 3 Primex applied sanded 4 Clear dope applied sanded 5 Dupont lOOS gray primer applied sanded December 1985 93 Above Based test results author estimated weight increase 13 oz fibergiassing 1/5scaie Corsair Actual weight gained including primer 15 oz O6-oz cloth used sheeted surfaces Below Added wainht heavy fiber alassina techniqus enn excesiva Amuthnr ARUn 7am 10 fn h9 CoveringTotal wt Projected wt materialgainbuild-up2 m oz/21 OOsq 098 098 fuselage frame over plans After assembly dry smooth both sides sanding block add plywood doub lers Round off fuselage edges sandpaper except stabilizer will mounted Cut out desired engine weight mount modules sand Cut out tail parts cockpit dorsal fin wing flaps sand smooth Sand some taper flaps elevator desired Cover parts lightweight heatshrink material Japanese tissue clear dope could used covering will probably require maintenance Add color dope trim desired Final assembly begins wing-fuse lage intersection Slip outboard tip cleaning wing opening sandpaper stick required Slip wing off its centered position temporarily coat center section top bottom thoroughly white glue Slip wing back proper final position Force white glue voids Align wing properly apply thin CyA entire joint unit will strong enough handle Make fillet baking soda around leading edge wing both sides apply CyA Clean covering material sur faces joined install horizontal stabilizer fuselage being careful align wing As wing joint use white glue CyA baking soda/ CyA fillet Similarly install fin rudder Slip flap joiner wire through fuselage Drill flaps Cut slots hinges Install flap elevator hinges shown plans cer tain run pins through hinges make sure wont come out Install control horns Rig pushrod bellcrank next last outside hole flap hornand pushrod last hole flap horn elevator Check plans control surface deflec tions Balance model shown plans sensitive controls move center gravity CG rearward less sensitive move CG forward May flying days windy Weight/Poffenbarger Continued page 93 heavy retrospect non-metallic Mono Kote variety also should have tested According experiment square inch 60-size 2100 sq sur photo Stuecker taken Geophysical article appeared May1985 issue Model Aviation noticed reader wrote MA requesting information wind flier served asthe structural format forthe Geophysical simpleand innocentbeglnningscamethe end product theform article HOYHXDEAWAYIIOBBYHTDEAWAYHOB9YHIAWAYHOBBYHIDAWAY FAMOUS BRITISH DIESELS AEROMODELLER PLANS SPARES M/E PAw D/C 3rd PRINTING CATALOG - DIESEL HANDBOOK $350 pp HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 Ho00YHrOEAwAHO0BYHIDEAWAflIO0BY9IDEAWAYHOB0Y4IDEAW 3 December 1985 175 FIBERGLASS COWLS 70 cowls eelpants Sig Pica Top-Flite Jemco Nosen Pilot Staflord Radials Behrens Garmhausen W E Tech other kits plans One-piece laminated construction handlaid fiberglass strong hut lightweight Send SASE price list please inclpde names models interested parts call between DAM 0 PM EDT information COD ordering hope hear youl 703 890-6017 Dept MA St 1 Sex 530 Geedview VA 24095 PAC MODEL SUPPLY WrCAiV4 203 575-0916 Flight-Proven DesignsTemp 203 393-1990 Balsa Construction 5-6 lbs Cessna 15040 Powered 62Easy Construction 110-15 hrs Stable Fliers Mooney 40 Powered 62Scale Like Appearance Slow Flying Capabilities Cherokee 40 Powered 604955 ea plus $250 UPS Cherokee 1/3 ScaleContest Proveni 23 place Ken Barnes200 plus 800 shipping Cessna 15025 Powered 50 3S plus $250 UPS NEW Firemaster BIpe5667 lbs60 Powered 6995 llntroductory Pricel Coming Soon 60 Powered Pattern Ships MasterCard ers Invited Meier Sr Owner/Pres lie Perugini Assist TARBaby TRANSMITTER CASE /Especially Turn-around thisAn inexpensive rugged molded .L 850 sq 120 4 cyclecase protect expensive iW powered Ron Ohidgey designtransmitter both two stick smooth solid performersingle stick transmitters Brown Rib templates computerleather grain aluminum trim plotted Plans construc lion hints locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing br plug-in wings Included pair ol special slip-fit phenolic sockets build wing structure Now size models 78 dia x 2 $ 895 1 dies 2$ 995 1 dia x3- $1495 Gator RIO Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 aster SION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 13141 221-8803 MANUFACTURERS OF SPORT PATTERN STINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 RBIPE NEW WING MOUNTING SET wing mounting system developed Ron Chidgey last neal accurate stays tight Three nylon brackets screws machined wing blocks included -$695 See Dealer Order Direct Include $150 Per Item UPS Information latest engines prices CALL OR WRITE FOR FREE CATALOG VISA MaslerCard Accepted F 0 X MFG CO 5305 TOWSON AVE FORT SMITH AR 72901 501 646-1656 face plane covered aluminum MonoKote total add-on weight would 55 oz Super Coverite lighter expected though addition Balsarite prepration balsa brings very close aluminum MonoKote overal weight build-up Su per Coverite joy work compared other methods finishing recommendead primer Primex very light respect silk dope can seen lightness silk overcome heaviness filler balsa preparation clear dope used both appliction priming steps Fibergiassing performed poly ester resin thinned MEK methyl ethyl ketone applied soft brush Excess resin blotted tissue paper little no sanding needed approach Comparison 06 oz/sq yd 1 5-oz cloth shows medium-weight cloth absorbs considerably resin primer giving rise 25oz additional build-up over 06-oz cloth surprising discovery though fibergiassing did result greatly-increased weight build-up com pared other methods certainly due method resin applica tion very satisfactory highly recommended resin poured blotted thinned heavy resin resi due will accumulate sanding will difficult Recently application glass cloth cyanoacrylate CyA glues has recommended much lighter method Using CyA 1 5-oz cloth did result much weight saving however apparent gray primer could sanded off better because cloth weave less visible blot ted-resin technique CyA method re quires excellent ventilation lot skill avoid bumps thready problems however keep mind experi ment weight build-up critical comparison ease application finish ing techniques Perhaps striking result ex periment weight build-up finding YS ENGINES HATORI HEADERS TETTRA HARDWARE ATLANTA- OMEGA SEE YOUR LOCAL DEALER SEND $1 FOR CATALOG $6 FOR HEADER POSTER GOLDEN GATE HOBBIES POBox 123 San Bruno CA 94066 TEL 415 952-3045 1 76 Model Aviation GZP C 904 478-6745 Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft Pro Line U G 43 West Nine Mile Rd Pensacola FL 32514 ~~2 * A Futaba Distributor er Inquiries Welcome * great weight penalty pay fiberglassing particularly proper technique followed method thinning catalyzed resin MEK blotting excess resin before has cured has covered previous issues Model Aviation necessary apply heavy resin coat balsasheeted surfaces penalty paid added weight far exceeds minimal benefit added strength Furthermore O6-oz glass cloth quite sufficient surfacing planes Comparing fiberglassing technique Super Coverite example would predict finish fibergiassed plane would weigh 227% carry comparison step further suppose built 1/5-scale DeHavilland Beaver used Balsarite Super Coy erite Primex finishing tech niqueand found finish failed achieve aluminum-sheeted appearance desired planning strategy second model plane could estimate 227% increase weight finishing materials lightweight glass cloth approach se lected might easily accommodated Schlueter Free Flight Models 3508 Poinsettia Ave Manhattan Beach Ca 90266 0 C PACIFIC ACE 0 BLACK BULLET RTIAL KITS plans&printedwvod PACIFiC ACE BLACK BULLET 20332530$470 40$665 ADD $200 SHIPPING FOR EACH 1t03 KIT ORDERCA RES ADO RI TAX Dealer Inquiries Invited WELLI TOLP YOU NOT TO STAND IN FRONT O THT ENGJ-N NEW IMPROVED dUm Wiliat Medd macre wouli POW *US PatRol No Des ** WANDIT * ealers Ivxded, * -- 6 * -I *10 ft CORD * *WetorDry * Stick Abrasives * *A Keen Machine gives exceptional *sanding control 101 excellent finish *5995Basic vcI 1 fIat Wand 1 each0 *xlRgvts *o595Bxida Special rid 2 lIar 1 naIlrxand sand 5 vi K grits9 * *129Dalaxe eExdes 3 hat 2 haIl rxand wandS 1 baIt wands 10 xl9 *K grits9 *Additional Wands Abrasives availabie *C * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 uite Texas 751499 December 1985 177 Futaba JR GLOW PLUG TAP 14-32 E8 4WtR HARRY HIGLEY 8 SONS INC P o Box 532 GLENWOOD ILL 60425 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX K AMA Membership143 Academy Av Research Dev12 Ace Radio Control Airtronics2 Altech MarketingCover 3 Astro Flight86 ISA9 n Built Models132 W~t flistributors144 165 Productions178 Enterprises146 24 yandTools178 154 Products16 Model Imports10 Model & Hobby Expo133 aroIlna Taffinder170 Cheveron164 Model Supply168 LrIc178 Condor Trading Co161 Consumers Guide26 Coverite29 151 Cox Hobbies147 iation150 ngineering174 Designs146 Systems24 jtm uenard Model Products172 Larry Dodge Aero Inc178 Dougs Hobby Shop94-97 Du-Bro Products Inc149 FAI Model Supply150 y Inc4 ass Master175 Models152 ost Products152 MfgCo176 27 IEC fl.Products162 i rroducts160 aur MI. rroducts176 Geometron Co171 Carl Goldherg Models5 153 Hobbies176 Products98175 Great Planes88 Harry B Hlgley& Sons166177 Historic Aviation25 Hobby Barn134-135 Hobby Horn170 Hobby Hideaway175 Hobby Lobby155 Hobby World Imports152 Holleys Silent Flight30 Ikon Northwest Co162 Indy RC Sales Inc138-1 40 International Modeler Show53 Jeff Ia Corp174 Jomar51 JTec136 K&BMfg172 K&S Engineering160 KandWEnt160 Kin Craft166 Knights Air133166 Kustom Kraftsmanship8 L&L Model Products18 Leading Edge157 Lindsey Micro Products166 Lone Star Models45 M&W Models162 MACS Products160 Master Kit176 McDaniel RC Service144 Messers Quality Model152 Micro Mark6-7 Micro Model Engineering150 Midwest Products175 Model Engineering Norwalk10 Model Ignition12 Model Magic Products47 Model Products Corp148 Model Rectifier CorpCover 2 Morrill-ADC168 Mutchlers Hobbies158-159 NEPRO174 Nor-Ray Products Inc55 North Products178 Off Ground Models163 Ohio Superstar156 PAC Model Supply176 PK Products129 Pacer Technology17 Peck-Polymers172 Penn Valley Hobby Center156 Peripheral Systems Inc28 Pica Productsis Polks Hobby31130-131 RC Buyers Guide 18 RC Video Magazine 150 RJL Industries 142 RJM Systems 162 Radio South 177 Repla-tech Intl 178 Robbe Modelsport 179 RoushMfg 170 SR Batteries176 SachsbyTG173 St Croix Park Falls28 Satellite City145 SavOn Hobbies49 Schlueter Free Flight Models177 Shamrock Competition Imports165 Sheldons Hobby Shop30 Sig Mfg16 Simcoe RC Aircraft Co13 Slim Line Mufflers148 Southeastern Air Crafters162 Standale Aircraft132 Sullivan Products1169 RC Sweitzer Enterprises129 T&D Fiberglass Spec 144 Tatone Prod Co 86 Tidewater Hobby Enterprises 55 Toledo RC Exposition 142 Top Flight Models Inc 87 Tower Hobbies 167 US Alpina85 VK Model Aircraft142 WE Technical Services 8 Wandit Manufacturing 177 Williams Bros 86 Wilshire Model Center 26 Windsor Propeller 144 Wing Mfg 16 Workshop Concepts World Engines Zenith Aviation RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS plane such Beaver fact lighterweightweight regardless material meth building techniques constructing sec- Another obvious conclusion drawnod Sure Micafllm pre-primed ond model could compensate forfrom experiment finishingcase lighter fibergiassing 15the small increase finishing materialtechniques add comparable amounts ofContinued page 180 ATHES ING MACHINES INE SHOP SUPPLIES S Fe Avetlon Modeler BLUE~DGE MACHINERY AND_TOOLS INC I0 Call oII f,e i-ASO-072-ASeeRHPrHSHHUHAI WOE ef Ic WV 562353AMHH7 MHHH8HCUHrHrE POAoeS36-YHeoioaeeWV25526 legE $100 boHr 200 Pugeel SILICONE TUBING O2550 SMALL 1 062 dl 1 83 00 MED1002 dl 0400$9000600 LANGE 1 125 dl 0000 81125 *2000 US CAN POSTPAID DODGE AERO INC 10210 MannIng Ave N Stiliwater MN 55082 178 Model Aviation flIII Ill ow, 11V1119 110111 2hour spectacular helicopter exploration Breathtaking music Critically acclaimed Details FREE VHS BETA Beerger Productions 32I7lt7AeUh La. 07102 /02 O10224I * SCALE DOCUMENTATION * SCALE DRAWINQSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1985 INTERNATIONAL AIRPLANE CATALOG48500 MCKENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send S 100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 NEWSPACESA FUEL CONTAINER FISHENYHUrBUS o 73/8 highE 91/8 THNgh Rigid PHIyHIh$IHHH INCIHEIHE THIIIH9 pI 8120 pEg FOHUNHArE Leck THMNg Through Cup North Products PO Box 18415 cleveland Heights OH 44118 ULinL 93Super Drone$1275 RC Shoulder-wing sport flier spans 68 uses 45-60 engine No 494HABOOB$400 CL Very lightweight sport/stunter flies wind power alone can adapted 049- 1 5 Cu glow engines Spans 39 No 495FW-1 90$425 RC Hand-launched all-balsa scalelike sport flier 1 0-1 5 engine spans 331/4 Part Dogfight Duo Two RC channels No 496P47 Thunderbolt$425 RO Characteristics like FW-1 90 Part Dogfight Duo Spans 33% No 153Slilietto CL Stunt model McDonald winner 19761 9801 982 FAI World Champ $ 375 No 239Blue Birils AC Ken Willards formation plane 4-channel 18 power 375 No 262Crashmasler CL Crash-proot trainer two nizes1 5-30- 35-40-power$125 No 299Gee Bee Sr Sparisler AC 1-scale Haftke tsr 91 power Prototype span 3011 Two halt sheets Ne 302Mint P16 RC Sarpnlus 049 docted tan sport tiler tsr 2-channel Balsa wings tail fuse structure$275 No 3101930 Fleet Biplane AC Sport Scale tsr 35-48 4-channel Wingspan 56 % scale Two sheets -$625 No 314Drake B AC Ken Willards flying boat 3-channel 15-power Ply tram land remnoable gear -$375 No 326Taylor Cab AC Dnn Sinus Schoolyard-Scale 049s 2-3 channel Spans 50 -$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope soaring -$200 No 356Pieces FF Indoor Easy B Aubber-power contest-winner hy W Van Gorder . $100 No 386Laser 200 AC Sport Scale replica ot championship Aerobatic Ilier Uses 40 power 4-5 channel Two sheets -61075 No 398Gee Bee ll1 RC Hatikes latest 1-scale spans 75 weighs 15 lh tiles 90 larger Pour sheets no doc- 62225 No 414Elecliic Spaiky AC electric powered tan flier tsr 05 motor 3-channel AC scaled api 939 rubber-power fuonrite9850 No 422Scooter AC Two-Meter Sailplane has won Nuts event 1982 1983 plus other contests$550 No 426Chioa CApper ACFahuloos 74-in span Sport Scale flying bout tor four 10 size engines aod 4-channel Three sheetsno doc $2000 No 430Imoside AC Zippy little sporister 1 0-1 5 power 3-channel AC -$400 Na 433Waits Up AC Electric-powered glider tor 2-3 channelo 035 motor spanO 52 No 437Kioiisher CL Profile Carrier plane spans 40% uses 35 engine - - -$600 INe 438Croloer PF Embryo Endurance rubber-power tan ship has big-model characteristics -$200 Ne 440Cavaler AC Old-Timer like new design has hoge wing br slow easy flights Far 35 power 3 channels Two sheets- -61725 No 441Nil Wil PP Hot small lightweight competition ship 15 power designer Horn] Murphy-- 475 No 442Lazy Duck AC Big canard sport flier tsr %A-09 power 2 channels Uses toam board parts - -6650 No 444Firehoit AC pusher canard sporllpattern uses 40 pusher engine 4-channel Has swept forward foam wings - 650 N 0446Le Crale AC Electric-powered sport tlier fur 05 motors 3-channels Two nersions parasol cabin6550 No 447hA Miss America AC Old-Timer %A Texaco model tsr 049 glow 2-channels$650 No 452Gee Bee Z AC Ouarter-scale spans 71% uses 90 power Pour sheets - -$1600 No 453Smoothie Prntile CL Profile rendition Bob Palmers soper-Stunter early Pifties 35 power$550 Ne 454Sweel P-3D PF Neat stick and-tissue Outdoor Aubber P30-class model isa cootnot-winner -$200 No 456HiTech 2001 AC Oucted-fan futuristic-looking canard 25-size engines Built-up construction Three sheets- -91175 No 457Spectra AC hlectric-power 05 size motor uses 3 different wings spurt soaring aerobatics-6700 Na 458Dauntleun CL Profile Carrier 15-power events Two sheets -6575 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size eogine 4 channels6650 Na 461Tinter Barnstormer CL Famous unflapped Stunter late Porties Uses 35 engine -6650 Ne 462Pemilia P0 FF Jumbo guSher Scale WW Italian observation plane -$400 No 463Platykelmiothes VE AC %A Pylon racer uses life ply built-up structure fur strength lightness- - $ 475 Ne 465Blue Max AC Pan-fly sporluter 40-size engines spans 52 Lightweight structure - -$700 Ne 466Competitor CL Stuntertor 60 power has 650 sq wing area - -$575 Na 467Alco Sport FP Aubber Scale design woo 83 Nato f designer Don SrulI Wingspan 26 in-9250 Nn 468Smoother CL Stunter 29135 power Design based oo hybrid SinoothielNobler$675 No 469Don Kichot AC Sport Scale rendering Polish homebuilt pusher Spans 75 uses 40-size 4-cycle engine Foursheets $2075 No 470Stinker 9C Mid-wing sportoter uses 40145 four-stroke engine spans 50% tail-dragger -6650 No 473Tocane AC Sport scale turboprop trainer spans 66 uses 60175 engines Two sheets. No 474Pacer 15 FF Nordic A-i Towline Glider won 1983 World Champs - -$500 No 475Geophysical CL Slow Combat model uses geodetic wiog construction 36 engine Two-sheet plan has partspatterns - 0 No 476ManIa 250 PP competition Ak plane has manta-ray-shaped wing spans 43 - 00 No 477Maodailo CL Sport Stunter uses sport 15 engine spans 35 in- 25 No 478Buttercup AC Cute elfin sportoter uses micro 2-ch AC pulse-rudder Spans 27 020 035 power- -$300 No 479Four-Stroke Booster ftC SportlAerobatics uhip has 1 920s styling uses 90 4-stroke engine spans 8S 2 sheets$1100 No 480Bidiculoss CL Pabuloas competition Stunter has 550 sq wing area flies TO 0491051 spans 47% in$600 No 481Europa 9C Sailplane PAl competition has fiberglass fuselage faam wings wing flaps stabilator tail Spans 110 in$700 No 482GeldesA8er AC SportlAerobatic model looks like Golden Age sportster 60 engines spans 62 -6750 Ne 483COS Nawk Ultralight PP Outdoor Gas Scale plane ones CO-2 power spans 29 - 00 Ne 484Aerneca K AC Osarter-Scale 30s Iightplane spans 9 ft. uses 12 ca 2-cyl 4-stroke engine weighs 11 y lbThree sheets$1975 No 485Hawker Hooter CL Fun-scale British et fighter has 16%-in foam wing uses %A power- 75 No 486Miles-Atwood Special AC Sport-Scale Golden Age air racer uses 21 engine spans 45 in-- $825 No 487Cap 21 AC Scale Aerobatic plane 40-size engine spans 62 Two sheets- -$1000 Na 488MB-i PP Jumbo Aubber Scale 1920-era Thomas Morse Scout biplane spans 37 00 Ne 489Undertaker CL Poam-wisged Past Combat plane 36 engine spans either 45 47 in- - 00 No 490Weekender AC Low-wing sport flier 20-size 4-stroke engine spans 47% -6575 No 491yellow Peril CL Advanced trainer all-balsa spans 23 uses %A power6325 No 491 Circulator PP A-i Towline Glider spans silo uses fiberglass tail boom circle-tow mechanism - 6 250 Circle numbers plans wish order 193239262299302 326332358386398 426430433437438 442444446447452 456457458460461 465466467468469 474475476477478 481482483484485 488489490491492 310 414 440 453 462 470 479 486 493 314 422 441 454 463 473 480 487 494 495496 Plan price leciedos firSi class poslage US delivery Which Air Mail over 300 miles orders oulside Ihe US lease add $250 Air Mail $125 surface mail Make check money order payable US funds Model Aviation c/u AMA 1910 Samuel Morse tIn Reoton VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ NAME STREET CITY STATE ZIP oz glass cloth keep mind data expressing small percentage total weight aircraft hypothetical 60-size plane weighed 8 lb 128 oz finishing materials add-on weight would vary 35% Micaflim 75% 15-oz glass cloth total usually tolerable range model aircraft An important consideration based upon results application data next project course finish ing techniques will differ condi tions experiment probably sufficiently alter outcome signifi cantly applying data will need estimate total surface area aircraft covered apply estimate follows X Weight oz increase estimate W Observed weight oz experiment Estimated surface area plane WA 2100 Dont forget add both top bottom wing surface areas plus tail surfaces guess fuselage area calculation may help select method over another clear however weight alone important influencing factor selecting finishing method As stated before personal prference de sire special effect skill tools hand hope durability weather conditions under work influences experiment simply removes possible preconceptions about weight build-up aspect decision-making process Weight paint included experiment simply because would add too complexities design experiment wide variety paints available us should subject future experiment Basical ly however white paints heavy clear lightest Pigment adds weight paint can add ounces unsuspected manner will inter esting technically challenging criti cally compare two-part epoxies poly isothiocyanates lacquers enamels onepart epoxies poly-S Voisin/SruII Continued page 89 testing Add clay get center gravity CG point shown plans Adjust model turn wide circles against torque left left handed prop means forward rudder ailerons As canards little model can handle much power wish use larger motors can achieve exhilarating high-climbing flights would have taken Gabriels breath away 180 Model Aviation 0 0 csJ n 0 -00 O3 00 zoo m 050 0 s oo us 0 -to GO 90 flb 000 0 00 00 0000 oa 000 80 Old C 00 us 0 0000 00 0 000 Ci 0 00 00~ Os 0 J 0 E00 U Os 000 N coo Is
Edition: Model Aviation - 1985/12
Page Numbers: 92, 93, 175, 176, 177, 178, 180
The experiment study weight build-up severai covering surface preparation techniqut. some can seen information presented provides added insight heip pick covering method modeis much weight various covering prepping materials add models 92 Model Aviation WHEN FINISHiNG MODEL weight added often Its con-method available intormation Indetermining whether project troll e dstead rely upon past experiences will successful flier possible to experi meni experiences RC colleagues ruin otherwise sound project poor show j u st howThese hands-on observations helpful choice finishing methodbut always accurate Weight often cited planning next model would principle reasons selecting methodbeneficial able estimate accurately material over another usually littlethe expected weight build-up method consideration given total addedversus another might give us greater weight comes balsa preparationversatility choice projects material priming Often reasons experiment possible make wise choice finishingdesigned accurately measure weight build-up various finishing techniques hoped data would provide basis comparing method other giving aeromodeler clearer perspective differences similari ties between several popular approaches thing must made clear before proceeding weight alone should factor selecting finishing method Strength durability type aircraft mod eled desired appearance time applica tion availability materials tools personal skill preference fluence decision experiment Five finishing materials selected silk aluminum MonoKote Super Coverite Micaflim glass cloth covering materials applied standard fashion Balsarite treatment balsa con ditions controlled experi mental laboratory silk purchased local fabric shop weight basis compared iden tically K&B silk Aluminum MonoKote Top Flite Models Super Coverite pre-primed Coverite Micafilm pur chased local hobby shop Two types glass cloth selected lightweight 06 oz/sq yd purchased Dan Par sons Products medium 15 02/sq yd Sig Manufacturing Co order make critical analytical com parisons 30 test sheets 1/16 balsa prepared measuring 5 x 4 21 sq test sheets labeled carefully weighed analytical balance sensitive milligram Mettler Analytical Balance addition three blank test sheets weighed throughout experiment treated other way blank balsa sheets served internal check control possible weight gain loss due humidity changes results experiment sum marized Table 1 principal methods finishing listed first column iron-on coverings two sub-groups analyzed no balsa prepara tion except sanding other Balsarite treatment second column lists weight build-up following Balsarite ap plication amounts 032 gm/21 sq about 1 oz total 60-size plane estimated 2100 sq total surface area silk-and-dope method balsa prepared three coats Sig balsa filler sanded between coat third column lists added weight application covering pre primed Micafilni added about 1 gm/test sheet up 35 oz/60-size plane difficulty working Micafilm because iron set too hot Adhesion much improved perfect after cool ing iron 2500F Balsarite improved adhesion shown Table 1 will add little final total weight about 1 oz Aluminum MonoKote surprisingly Continued page 175 Table 1 Weight Balsa Prep icaflim no Balsarite Balsarite030 Aluminum no Balsarite MonoKote Balsarite Super no Balsarite Coverite Balsarite Silk Dope Polyester Resin Glass 060 02/sq yd Cloth 15 ozIsq yd Various Finishing Techniques 1 Prime 098 128 156156 034157191 108024132 032108023163 346 452 550 674 466 575 047070060177624 Primary application 109 160 Cyanoacrylate Glass Cloth 15 02/sq yd195 Secondary application 039 045 052 067 200 272 039234 705 959 825 1 Data first four columns expressed grams gin value represents average three separate experimental determinations column records weight increase measured test sheet 5 x 4 121 sq 2 Projectedweight build-up expressed oz121 00 sq 2100 sq estimate total surface area 60-size plane estimate includes finishing steps through surface priming step Painting included ounce equals 2835 gin 3 Primex applied sanded 4 Clear dope applied sanded 5 Dupont lOOS gray primer applied sanded December 1985 93 Above Based test results author estimated weight increase 13 oz fibergiassing 1/5scaie Corsair Actual weight gained including primer 15 oz O6-oz cloth used sheeted surfaces Below Added wainht heavy fiber alassina techniqus enn excesiva Amuthnr ARUn 7am 10 fn h9 CoveringTotal wt Projected wt materialgainbuild-up2 m oz/21 OOsq 098 098 fuselage frame over plans After assembly dry smooth both sides sanding block add plywood doub lers Round off fuselage edges sandpaper except stabilizer will mounted Cut out desired engine weight mount modules sand Cut out tail parts cockpit dorsal fin wing flaps sand smooth Sand some taper flaps elevator desired Cover parts lightweight heatshrink material Japanese tissue clear dope could used covering will probably require maintenance Add color dope trim desired Final assembly begins wing-fuse lage intersection Slip outboard tip cleaning wing opening sandpaper stick required Slip wing off its centered position temporarily coat center section top bottom thoroughly white glue Slip wing back proper final position Force white glue voids Align wing properly apply thin CyA entire joint unit will strong enough handle Make fillet baking soda around leading edge wing both sides apply CyA Clean covering material sur faces joined install horizontal stabilizer fuselage being careful align wing As wing joint use white glue CyA baking soda/ CyA fillet Similarly install fin rudder Slip flap joiner wire through fuselage Drill flaps Cut slots hinges Install flap elevator hinges shown plans cer tain run pins through hinges make sure wont come out Install control horns Rig pushrod bellcrank next last outside hole flap hornand pushrod last hole flap horn elevator Check plans control surface deflec tions Balance model shown plans sensitive controls move center gravity CG rearward less sensitive move CG forward May flying days windy Weight/Poffenbarger Continued page 93 heavy retrospect non-metallic Mono Kote variety also should have tested According experiment square inch 60-size 2100 sq sur photo Stuecker taken Geophysical article appeared May1985 issue Model Aviation noticed reader wrote MA requesting information wind flier served asthe structural format forthe Geophysical simpleand innocentbeglnningscamethe end product theform article HOYHXDEAWAYIIOBBYHTDEAWAYHOB9YHIAWAYHOBBYHIDAWAY FAMOUS BRITISH DIESELS AEROMODELLER PLANS SPARES M/E PAw D/C 3rd PRINTING CATALOG - DIESEL HANDBOOK $350 pp HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 Ho00YHrOEAwAHO0BYHIDEAWAflIO0BY9IDEAWAYHOB0Y4IDEAW 3 December 1985 175 FIBERGLASS COWLS 70 cowls eelpants Sig Pica Top-Flite Jemco Nosen Pilot Staflord Radials Behrens Garmhausen W E Tech other kits plans One-piece laminated construction handlaid fiberglass strong hut lightweight Send SASE price list please inclpde names models interested parts call between DAM 0 PM EDT information COD ordering hope hear youl 703 890-6017 Dept MA St 1 Sex 530 Geedview VA 24095 PAC MODEL SUPPLY WrCAiV4 203 575-0916 Flight-Proven DesignsTemp 203 393-1990 Balsa Construction 5-6 lbs Cessna 15040 Powered 62Easy Construction 110-15 hrs Stable Fliers Mooney 40 Powered 62Scale Like Appearance Slow Flying Capabilities Cherokee 40 Powered 604955 ea plus $250 UPS Cherokee 1/3 ScaleContest Proveni 23 place Ken Barnes200 plus 800 shipping Cessna 15025 Powered 50 3S plus $250 UPS NEW Firemaster BIpe5667 lbs60 Powered 6995 llntroductory Pricel Coming Soon 60 Powered Pattern Ships MasterCard ers Invited Meier Sr Owner/Pres lie Perugini Assist TARBaby TRANSMITTER CASE /Especially Turn-around thisAn inexpensive rugged molded .L 850 sq 120 4 cyclecase protect expensive iW powered Ron Ohidgey designtransmitter both two stick smooth solid performersingle stick transmitters Brown Rib templates computerleather grain aluminum trim plotted Plans construc lion hints locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing br plug-in wings Included pair ol special slip-fit phenolic sockets build wing structure Now size models 78 dia x 2 $ 895 1 dies 2$ 995 1 dia x3- $1495 Gator RIO Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 aster SION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 13141 221-8803 MANUFACTURERS OF SPORT PATTERN STINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 RBIPE NEW WING MOUNTING SET wing mounting system developed Ron Chidgey last neal accurate stays tight Three nylon brackets screws machined wing blocks included -$695 See Dealer Order Direct Include $150 Per Item UPS Information latest engines prices CALL OR WRITE FOR FREE CATALOG VISA MaslerCard Accepted F 0 X MFG CO 5305 TOWSON AVE FORT SMITH AR 72901 501 646-1656 face plane covered aluminum MonoKote total add-on weight would 55 oz Super Coverite lighter expected though addition Balsarite prepration balsa brings very close aluminum MonoKote overal weight build-up Su per Coverite joy work compared other methods finishing recommendead primer Primex very light respect silk dope can seen lightness silk overcome heaviness filler balsa preparation clear dope used both appliction priming steps Fibergiassing performed poly ester resin thinned MEK methyl ethyl ketone applied soft brush Excess resin blotted tissue paper little no sanding needed approach Comparison 06 oz/sq yd 1 5-oz cloth shows medium-weight cloth absorbs considerably resin primer giving rise 25oz additional build-up over 06-oz cloth surprising discovery though fibergiassing did result greatly-increased weight build-up com pared other methods certainly due method resin applica tion very satisfactory highly recommended resin poured blotted thinned heavy resin resi due will accumulate sanding will difficult Recently application glass cloth cyanoacrylate CyA glues has recommended much lighter method Using CyA 1 5-oz cloth did result much weight saving however apparent gray primer could sanded off better because cloth weave less visible blot ted-resin technique CyA method re quires excellent ventilation lot skill avoid bumps thready problems however keep mind experi ment weight build-up critical comparison ease application finish ing techniques Perhaps striking result ex periment weight build-up finding YS ENGINES HATORI HEADERS TETTRA HARDWARE ATLANTA- OMEGA SEE YOUR LOCAL DEALER SEND $1 FOR CATALOG $6 FOR HEADER POSTER GOLDEN GATE HOBBIES POBox 123 San Bruno CA 94066 TEL 415 952-3045 1 76 Model Aviation GZP C 904 478-6745 Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft Pro Line U G 43 West Nine Mile Rd Pensacola FL 32514 ~~2 * A Futaba Distributor er Inquiries Welcome * great weight penalty pay fiberglassing particularly proper technique followed method thinning catalyzed resin MEK blotting excess resin before has cured has covered previous issues Model Aviation necessary apply heavy resin coat balsasheeted surfaces penalty paid added weight far exceeds minimal benefit added strength Furthermore O6-oz glass cloth quite sufficient surfacing planes Comparing fiberglassing technique Super Coverite example would predict finish fibergiassed plane would weigh 227% carry comparison step further suppose built 1/5-scale DeHavilland Beaver used Balsarite Super Coy erite Primex finishing tech niqueand found finish failed achieve aluminum-sheeted appearance desired planning strategy second model plane could estimate 227% increase weight finishing materials lightweight glass cloth approach se lected might easily accommodated Schlueter Free Flight Models 3508 Poinsettia Ave Manhattan Beach Ca 90266 0 C PACIFIC ACE 0 BLACK BULLET RTIAL KITS plans&printedwvod PACIFiC ACE BLACK BULLET 20332530$470 40$665 ADD $200 SHIPPING FOR EACH 1t03 KIT ORDERCA RES ADO RI TAX Dealer Inquiries Invited WELLI TOLP YOU NOT TO STAND IN FRONT O THT ENGJ-N NEW IMPROVED dUm Wiliat Medd macre wouli POW *US PatRol No Des ** WANDIT * ealers Ivxded, * -- 6 * -I *10 ft CORD * *WetorDry * Stick Abrasives * *A Keen Machine gives exceptional *sanding control 101 excellent finish *5995Basic vcI 1 fIat Wand 1 each0 *xlRgvts *o595Bxida Special rid 2 lIar 1 naIlrxand sand 5 vi K grits9 * *129Dalaxe eExdes 3 hat 2 haIl rxand wandS 1 baIt wands 10 xl9 *K grits9 *Additional Wands Abrasives availabie *C * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 uite Texas 751499 December 1985 177 Futaba JR GLOW PLUG TAP 14-32 E8 4WtR HARRY HIGLEY 8 SONS INC P o Box 532 GLENWOOD ILL 60425 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX K AMA Membership143 Academy Av Research Dev12 Ace Radio Control Airtronics2 Altech MarketingCover 3 Astro Flight86 ISA9 n Built Models132 W~t flistributors144 165 Productions178 Enterprises146 24 yandTools178 154 Products16 Model Imports10 Model & Hobby Expo133 aroIlna Taffinder170 Cheveron164 Model Supply168 LrIc178 Condor Trading Co161 Consumers Guide26 Coverite29 151 Cox Hobbies147 iation150 ngineering174 Designs146 Systems24 jtm uenard Model Products172 Larry Dodge Aero Inc178 Dougs Hobby Shop94-97 Du-Bro Products Inc149 FAI Model Supply150 y Inc4 ass Master175 Models152 ost Products152 MfgCo176 27 IEC fl.Products162 i rroducts160 aur MI. rroducts176 Geometron Co171 Carl Goldherg Models5 153 Hobbies176 Products98175 Great Planes88 Harry B Hlgley& Sons166177 Historic Aviation25 Hobby Barn134-135 Hobby Horn170 Hobby Hideaway175 Hobby Lobby155 Hobby World Imports152 Holleys Silent Flight30 Ikon Northwest Co162 Indy RC Sales Inc138-1 40 International Modeler Show53 Jeff Ia Corp174 Jomar51 JTec136 K&BMfg172 K&S Engineering160 KandWEnt160 Kin Craft166 Knights Air133166 Kustom Kraftsmanship8 L&L Model Products18 Leading Edge157 Lindsey Micro Products166 Lone Star Models45 M&W Models162 MACS Products160 Master Kit176 McDaniel RC Service144 Messers Quality Model152 Micro Mark6-7 Micro Model Engineering150 Midwest Products175 Model Engineering Norwalk10 Model Ignition12 Model Magic Products47 Model Products Corp148 Model Rectifier CorpCover 2 Morrill-ADC168 Mutchlers Hobbies158-159 NEPRO174 Nor-Ray Products Inc55 North Products178 Off Ground Models163 Ohio Superstar156 PAC Model Supply176 PK Products129 Pacer Technology17 Peck-Polymers172 Penn Valley Hobby Center156 Peripheral Systems Inc28 Pica Productsis Polks Hobby31130-131 RC Buyers Guide 18 RC Video Magazine 150 RJL Industries 142 RJM Systems 162 Radio South 177 Repla-tech Intl 178 Robbe Modelsport 179 RoushMfg 170 SR Batteries176 SachsbyTG173 St Croix Park Falls28 Satellite City145 SavOn Hobbies49 Schlueter Free Flight Models177 Shamrock Competition Imports165 Sheldons Hobby Shop30 Sig Mfg16 Simcoe RC Aircraft Co13 Slim Line Mufflers148 Southeastern Air Crafters162 Standale Aircraft132 Sullivan Products1169 RC Sweitzer Enterprises129 T&D Fiberglass Spec 144 Tatone Prod Co 86 Tidewater Hobby Enterprises 55 Toledo RC Exposition 142 Top Flight Models Inc 87 Tower Hobbies 167 US Alpina85 VK Model Aircraft142 WE Technical Services 8 Wandit Manufacturing 177 Williams Bros 86 Wilshire Model Center 26 Windsor Propeller 144 Wing Mfg 16 Workshop Concepts World Engines Zenith Aviation RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS plane such Beaver fact lighterweightweight regardless material meth building techniques constructing sec- Another obvious conclusion drawnod Sure Micafllm pre-primed ond model could compensate forfrom experiment finishingcase lighter fibergiassing 15the small increase finishing materialtechniques add comparable amounts ofContinued page 180 ATHES ING MACHINES INE SHOP SUPPLIES S Fe Avetlon Modeler BLUE~DGE MACHINERY AND_TOOLS INC I0 Call oII f,e i-ASO-072-ASeeRHPrHSHHUHAI WOE ef Ic WV 562353AMHH7 MHHH8HCUHrHrE POAoeS36-YHeoioaeeWV25526 legE $100 boHr 200 Pugeel SILICONE TUBING O2550 SMALL 1 062 dl 1 83 00 MED1002 dl 0400$9000600 LANGE 1 125 dl 0000 81125 *2000 US CAN POSTPAID DODGE AERO INC 10210 MannIng Ave N Stiliwater MN 55082 178 Model Aviation flIII Ill ow, 11V1119 110111 2hour spectacular helicopter exploration Breathtaking music Critically acclaimed Details FREE VHS BETA Beerger Productions 32I7lt7AeUh La. 07102 /02 O10224I * SCALE DOCUMENTATION * SCALE DRAWINQSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1985 INTERNATIONAL AIRPLANE CATALOG48500 MCKENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send S 100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 NEWSPACESA FUEL CONTAINER FISHENYHUrBUS o 73/8 highE 91/8 THNgh Rigid PHIyHIh$IHHH INCIHEIHE THIIIH9 pI 8120 pEg FOHUNHArE Leck THMNg Through Cup North Products PO Box 18415 cleveland Heights OH 44118 ULinL 93Super Drone$1275 RC Shoulder-wing sport flier spans 68 uses 45-60 engine No 494HABOOB$400 CL Very lightweight sport/stunter flies wind power alone can adapted 049- 1 5 Cu glow engines Spans 39 No 495FW-1 90$425 RC Hand-launched all-balsa scalelike sport flier 1 0-1 5 engine spans 331/4 Part Dogfight Duo Two RC channels No 496P47 Thunderbolt$425 RO Characteristics like FW-1 90 Part Dogfight Duo Spans 33% No 153Slilietto CL Stunt model McDonald winner 19761 9801 982 FAI World Champ $ 375 No 239Blue Birils AC Ken Willards formation plane 4-channel 18 power 375 No 262Crashmasler CL Crash-proot trainer two nizes1 5-30- 35-40-power$125 No 299Gee Bee Sr Sparisler AC 1-scale Haftke tsr 91 power Prototype span 3011 Two halt sheets Ne 302Mint P16 RC Sarpnlus 049 docted tan sport tiler tsr 2-channel Balsa wings tail fuse structure$275 No 3101930 Fleet Biplane AC Sport Scale tsr 35-48 4-channel Wingspan 56 % scale Two sheets -$625 No 314Drake B AC Ken Willards flying boat 3-channel 15-power Ply tram land remnoable gear -$375 No 326Taylor Cab AC Dnn Sinus Schoolyard-Scale 049s 2-3 channel Spans 50 -$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope soaring -$200 No 356Pieces FF Indoor Easy B Aubber-power contest-winner hy W Van Gorder . $100 No 386Laser 200 AC Sport Scale replica ot championship Aerobatic Ilier Uses 40 power 4-5 channel Two sheets -61075 No 398Gee Bee ll1 RC Hatikes latest 1-scale spans 75 weighs 15 lh tiles 90 larger Pour sheets no doc- 62225 No 414Elecliic Spaiky AC electric powered tan flier tsr 05 motor 3-channel AC scaled api 939 rubber-power fuonrite9850 No 422Scooter AC Two-Meter Sailplane has won Nuts event 1982 1983 plus other contests$550 No 426Chioa CApper ACFahuloos 74-in span Sport Scale flying bout tor four 10 size engines aod 4-channel Three sheetsno doc $2000 No 430Imoside AC Zippy little sporister 1 0-1 5 power 3-channel AC -$400 Na 433Waits Up AC Electric-powered glider tor 2-3 channelo 035 motor spanO 52 No 437Kioiisher CL Profile Carrier plane spans 40% uses 35 engine - - -$600 INe 438Croloer PF Embryo Endurance rubber-power tan ship has big-model characteristics -$200 Ne 440Cavaler AC Old-Timer like new design has hoge wing br slow easy flights Far 35 power 3 channels Two sheets- -61725 No 441Nil Wil PP Hot small lightweight competition ship 15 power designer Horn] Murphy-- 475 No 442Lazy Duck AC Big canard sport flier tsr %A-09 power 2 channels Uses toam board parts - -6650 No 444Firehoit AC pusher canard sporllpattern uses 40 pusher engine 4-channel Has swept forward foam wings - 650 N 0446Le Crale AC Electric-powered sport tlier fur 05 motors 3-channels Two nersions parasol cabin6550 No 447hA Miss America AC Old-Timer %A Texaco model tsr 049 glow 2-channels$650 No 452Gee Bee Z AC Ouarter-scale spans 71% uses 90 power Pour sheets - -$1600 No 453Smoothie Prntile CL Profile rendition Bob Palmers soper-Stunter early Pifties 35 power$550 Ne 454Sweel P-3D PF Neat stick and-tissue Outdoor Aubber P30-class model isa cootnot-winner -$200 No 456HiTech 2001 AC Oucted-fan futuristic-looking canard 25-size engines Built-up construction Three sheets- -91175 No 457Spectra AC hlectric-power 05 size motor uses 3 different wings spurt soaring aerobatics-6700 Na 458Dauntleun CL Profile Carrier 15-power events Two sheets -6575 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size eogine 4 channels6650 Na 461Tinter Barnstormer CL Famous unflapped Stunter late Porties Uses 35 engine -6650 Ne 462Pemilia P0 FF Jumbo guSher Scale WW Italian observation plane -$400 No 463Platykelmiothes VE AC %A Pylon racer uses life ply built-up structure fur strength lightness- - $ 475 Ne 465Blue Max AC Pan-fly sporluter 40-size engines spans 52 Lightweight structure - -$700 Ne 466Competitor CL Stuntertor 60 power has 650 sq wing area - -$575 Na 467Alco Sport FP Aubber Scale design woo 83 Nato f designer Don SrulI Wingspan 26 in-9250 Nn 468Smoother CL Stunter 29135 power Design based oo hybrid SinoothielNobler$675 No 469Don Kichot AC Sport Scale rendering Polish homebuilt pusher Spans 75 uses 40-size 4-cycle engine Foursheets $2075 No 470Stinker 9C Mid-wing sportoter uses 40145 four-stroke engine spans 50% tail-dragger -6650 No 473Tocane AC Sport scale turboprop trainer spans 66 uses 60175 engines Two sheets. No 474Pacer 15 FF Nordic A-i Towline Glider won 1983 World Champs - -$500 No 475Geophysical CL Slow Combat model uses geodetic wiog construction 36 engine Two-sheet plan has partspatterns - 0 No 476ManIa 250 PP competition Ak plane has manta-ray-shaped wing spans 43 - 00 No 477Maodailo CL Sport Stunter uses sport 15 engine spans 35 in- 25 No 478Buttercup AC Cute elfin sportoter uses micro 2-ch AC pulse-rudder Spans 27 020 035 power- -$300 No 479Four-Stroke Booster ftC SportlAerobatics uhip has 1 920s styling uses 90 4-stroke engine spans 8S 2 sheets$1100 No 480Bidiculoss CL Pabuloas competition Stunter has 550 sq wing area flies TO 0491051 spans 47% in$600 No 481Europa 9C Sailplane PAl competition has fiberglass fuselage faam wings wing flaps stabilator tail Spans 110 in$700 No 482GeldesA8er AC SportlAerobatic model looks like Golden Age sportster 60 engines spans 62 -6750 Ne 483COS Nawk Ultralight PP Outdoor Gas Scale plane ones CO-2 power spans 29 - 00 Ne 484Aerneca K AC Osarter-Scale 30s Iightplane spans 9 ft. uses 12 ca 2-cyl 4-stroke engine weighs 11 y lbThree sheets$1975 No 485Hawker Hooter CL Fun-scale British et fighter has 16%-in foam wing uses %A power- 75 No 486Miles-Atwood Special AC Sport-Scale Golden Age air racer uses 21 engine spans 45 in-- $825 No 487Cap 21 AC Scale Aerobatic plane 40-size engine spans 62 Two sheets- -$1000 Na 488MB-i PP Jumbo Aubber Scale 1920-era Thomas Morse Scout biplane spans 37 00 Ne 489Undertaker CL Poam-wisged Past Combat plane 36 engine spans either 45 47 in- - 00 No 490Weekender AC Low-wing sport flier 20-size 4-stroke engine spans 47% -6575 No 491yellow Peril CL Advanced trainer all-balsa spans 23 uses %A power6325 No 491 Circulator PP A-i Towline Glider spans silo uses fiberglass tail boom circle-tow mechanism - 6 250 Circle numbers plans wish order 193239262299302 326332358386398 426430433437438 442444446447452 456457458460461 465466467468469 474475476477478 481482483484485 488489490491492 310 414 440 453 462 470 479 486 493 314 422 441 454 463 473 480 487 494 495496 Plan price leciedos firSi class poslage US delivery Which Air Mail over 300 miles orders oulside Ihe US lease add $250 Air Mail $125 surface mail Make check money order payable US funds Model Aviation c/u AMA 1910 Samuel Morse tIn Reoton VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ NAME STREET CITY STATE ZIP oz glass cloth keep mind data expressing small percentage total weight aircraft hypothetical 60-size plane weighed 8 lb 128 oz finishing materials add-on weight would vary 35% Micaflim 75% 15-oz glass cloth total usually tolerable range model aircraft An important consideration based upon results application data next project course finish ing techniques will differ condi tions experiment probably sufficiently alter outcome signifi cantly applying data will need estimate total surface area aircraft covered apply estimate follows X Weight oz increase estimate W Observed weight oz experiment Estimated surface area plane WA 2100 Dont forget add both top bottom wing surface areas plus tail surfaces guess fuselage area calculation may help select method over another clear however weight alone important influencing factor selecting finishing method As stated before personal prference de sire special effect skill tools hand hope durability weather conditions under work influences experiment simply removes possible preconceptions about weight build-up aspect decision-making process Weight paint included experiment simply because would add too complexities design experiment wide variety paints available us should subject future experiment Basical ly however white paints heavy clear lightest Pigment adds weight paint can add ounces unsuspected manner will inter esting technically challenging criti cally compare two-part epoxies poly isothiocyanates lacquers enamels onepart epoxies poly-S Voisin/SruII Continued page 89 testing Add clay get center gravity CG point shown plans Adjust model turn wide circles against torque left left handed prop means forward rudder ailerons As canards little model can handle much power wish use larger motors can achieve exhilarating high-climbing flights would have taken Gabriels breath away 180 Model Aviation 0 0 csJ n 0 -00 O3 00 zoo m 050 0 s oo us 0 -to GO 90 flb 000 0 00 00 0000 oa 000 80 Old C 00 us 0 0000 00 0 000 Ci 0 00 00~ Os 0 J 0 E00 U Os 000 N coo Is
Edition: Model Aviation - 1985/12
Page Numbers: 92, 93, 175, 176, 177, 178, 180
The experiment study weight build-up severai covering surface preparation techniqut. some can seen information presented provides added insight heip pick covering method modeis much weight various covering prepping materials add models 92 Model Aviation WHEN FINISHiNG MODEL weight added often Its con-method available intormation Indetermining whether project troll e dstead rely upon past experiences will successful flier possible to experi meni experiences RC colleagues ruin otherwise sound project poor show j u st howThese hands-on observations helpful choice finishing methodbut always accurate Weight often cited planning next model would principle reasons selecting methodbeneficial able estimate accurately material over another usually littlethe expected weight build-up method consideration given total addedversus another might give us greater weight comes balsa preparationversatility choice projects material priming Often reasons experiment possible make wise choice finishingdesigned accurately measure weight build-up various finishing techniques hoped data would provide basis comparing method other giving aeromodeler clearer perspective differences similari ties between several popular approaches thing must made clear before proceeding weight alone should factor selecting finishing method Strength durability type aircraft mod eled desired appearance time applica tion availability materials tools personal skill preference fluence decision experiment Five finishing materials selected silk aluminum MonoKote Super Coverite Micaflim glass cloth covering materials applied standard fashion Balsarite treatment balsa con ditions controlled experi mental laboratory silk purchased local fabric shop weight basis compared iden tically K&B silk Aluminum MonoKote Top Flite Models Super Coverite pre-primed Coverite Micafilm pur chased local hobby shop Two types glass cloth selected lightweight 06 oz/sq yd purchased Dan Par sons Products medium 15 02/sq yd Sig Manufacturing Co order make critical analytical com parisons 30 test sheets 1/16 balsa prepared measuring 5 x 4 21 sq test sheets labeled carefully weighed analytical balance sensitive milligram Mettler Analytical Balance addition three blank test sheets weighed throughout experiment treated other way blank balsa sheets served internal check control possible weight gain loss due humidity changes results experiment sum marized Table 1 principal methods finishing listed first column iron-on coverings two sub-groups analyzed no balsa prepara tion except sanding other Balsarite treatment second column lists weight build-up following Balsarite ap plication amounts 032 gm/21 sq about 1 oz total 60-size plane estimated 2100 sq total surface area silk-and-dope method balsa prepared three coats Sig balsa filler sanded between coat third column lists added weight application covering pre primed Micafilni added about 1 gm/test sheet up 35 oz/60-size plane difficulty working Micafilm because iron set too hot Adhesion much improved perfect after cool ing iron 2500F Balsarite improved adhesion shown Table 1 will add little final total weight about 1 oz Aluminum MonoKote surprisingly Continued page 175 Table 1 Weight Balsa Prep icaflim no Balsarite Balsarite030 Aluminum no Balsarite MonoKote Balsarite Super no Balsarite Coverite Balsarite Silk Dope Polyester Resin Glass 060 02/sq yd Cloth 15 ozIsq yd Various Finishing Techniques 1 Prime 098 128 156156 034157191 108024132 032108023163 346 452 550 674 466 575 047070060177624 Primary application 109 160 Cyanoacrylate Glass Cloth 15 02/sq yd195 Secondary application 039 045 052 067 200 272 039234 705 959 825 1 Data first four columns expressed grams gin value represents average three separate experimental determinations column records weight increase measured test sheet 5 x 4 121 sq 2 Projectedweight build-up expressed oz121 00 sq 2100 sq estimate total surface area 60-size plane estimate includes finishing steps through surface priming step Painting included ounce equals 2835 gin 3 Primex applied sanded 4 Clear dope applied sanded 5 Dupont lOOS gray primer applied sanded December 1985 93 Above Based test results author estimated weight increase 13 oz fibergiassing 1/5scaie Corsair Actual weight gained including primer 15 oz O6-oz cloth used sheeted surfaces Below Added wainht heavy fiber alassina techniqus enn excesiva Amuthnr ARUn 7am 10 fn h9 CoveringTotal wt Projected wt materialgainbuild-up2 m oz/21 OOsq 098 098 fuselage frame over plans After assembly dry smooth both sides sanding block add plywood doub lers Round off fuselage edges sandpaper except stabilizer will mounted Cut out desired engine weight mount modules sand Cut out tail parts cockpit dorsal fin wing flaps sand smooth Sand some taper flaps elevator desired Cover parts lightweight heatshrink material Japanese tissue clear dope could used covering will probably require maintenance Add color dope trim desired Final assembly begins wing-fuse lage intersection Slip outboard tip cleaning wing opening sandpaper stick required Slip wing off its centered position temporarily coat center section top bottom thoroughly white glue Slip wing back proper final position Force white glue voids Align wing properly apply thin CyA entire joint unit will strong enough handle Make fillet baking soda around leading edge wing both sides apply CyA Clean covering material sur faces joined install horizontal stabilizer fuselage being careful align wing As wing joint use white glue CyA baking soda/ CyA fillet Similarly install fin rudder Slip flap joiner wire through fuselage Drill flaps Cut slots hinges Install flap elevator hinges shown plans cer tain run pins through hinges make sure wont come out Install control horns Rig pushrod bellcrank next last outside hole flap hornand pushrod last hole flap horn elevator Check plans control surface deflec tions Balance model shown plans sensitive controls move center gravity CG rearward less sensitive move CG forward May flying days windy Weight/Poffenbarger Continued page 93 heavy retrospect non-metallic Mono Kote variety also should have tested According experiment square inch 60-size 2100 sq sur photo Stuecker taken Geophysical article appeared May1985 issue Model Aviation noticed reader wrote MA requesting information wind flier served asthe structural format forthe Geophysical simpleand innocentbeglnningscamethe end product theform article HOYHXDEAWAYIIOBBYHTDEAWAYHOB9YHIAWAYHOBBYHIDAWAY FAMOUS BRITISH DIESELS AEROMODELLER PLANS SPARES M/E PAw D/C 3rd PRINTING CATALOG - DIESEL HANDBOOK $350 pp HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 Ho00YHrOEAwAHO0BYHIDEAWAflIO0BY9IDEAWAYHOB0Y4IDEAW 3 December 1985 175 FIBERGLASS COWLS 70 cowls eelpants Sig Pica Top-Flite Jemco Nosen Pilot Staflord Radials Behrens Garmhausen W E Tech other kits plans One-piece laminated construction handlaid fiberglass strong hut lightweight Send SASE price list please inclpde names models interested parts call between DAM 0 PM EDT information COD ordering hope hear youl 703 890-6017 Dept MA St 1 Sex 530 Geedview VA 24095 PAC MODEL SUPPLY WrCAiV4 203 575-0916 Flight-Proven DesignsTemp 203 393-1990 Balsa Construction 5-6 lbs Cessna 15040 Powered 62Easy Construction 110-15 hrs Stable Fliers Mooney 40 Powered 62Scale Like Appearance Slow Flying Capabilities Cherokee 40 Powered 604955 ea plus $250 UPS Cherokee 1/3 ScaleContest Proveni 23 place Ken Barnes200 plus 800 shipping Cessna 15025 Powered 50 3S plus $250 UPS NEW Firemaster BIpe5667 lbs60 Powered 6995 llntroductory Pricel Coming Soon 60 Powered Pattern Ships MasterCard ers Invited Meier Sr Owner/Pres lie Perugini Assist TARBaby TRANSMITTER CASE /Especially Turn-around thisAn inexpensive rugged molded .L 850 sq 120 4 cyclecase protect expensive iW powered Ron Ohidgey designtransmitter both two stick smooth solid performersingle stick transmitters Brown Rib templates computerleather grain aluminum trim plotted Plans construc lion hints locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing br plug-in wings Included pair ol special slip-fit phenolic sockets build wing structure Now size models 78 dia x 2 $ 895 1 dies 2$ 995 1 dia x3- $1495 Gator RIO Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 aster SION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 13141 221-8803 MANUFACTURERS OF SPORT PATTERN STINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 RBIPE NEW WING MOUNTING SET wing mounting system developed Ron Chidgey last neal accurate stays tight Three nylon brackets screws machined wing blocks included -$695 See Dealer Order Direct Include $150 Per Item UPS Information latest engines prices CALL OR WRITE FOR FREE CATALOG VISA MaslerCard Accepted F 0 X MFG CO 5305 TOWSON AVE FORT SMITH AR 72901 501 646-1656 face plane covered aluminum MonoKote total add-on weight would 55 oz Super Coverite lighter expected though addition Balsarite prepration balsa brings very close aluminum MonoKote overal weight build-up Su per Coverite joy work compared other methods finishing recommendead primer Primex very light respect silk dope can seen lightness silk overcome heaviness filler balsa preparation clear dope used both appliction priming steps Fibergiassing performed poly ester resin thinned MEK methyl ethyl ketone applied soft brush Excess resin blotted tissue paper little no sanding needed approach Comparison 06 oz/sq yd 1 5-oz cloth shows medium-weight cloth absorbs considerably resin primer giving rise 25oz additional build-up over 06-oz cloth surprising discovery though fibergiassing did result greatly-increased weight build-up com pared other methods certainly due method resin applica tion very satisfactory highly recommended resin poured blotted thinned heavy resin resi due will accumulate sanding will difficult Recently application glass cloth cyanoacrylate CyA glues has recommended much lighter method Using CyA 1 5-oz cloth did result much weight saving however apparent gray primer could sanded off better because cloth weave less visible blot ted-resin technique CyA method re quires excellent ventilation lot skill avoid bumps thready problems however keep mind experi ment weight build-up critical comparison ease application finish ing techniques Perhaps striking result ex periment weight build-up finding YS ENGINES HATORI HEADERS TETTRA HARDWARE ATLANTA- OMEGA SEE YOUR LOCAL DEALER SEND $1 FOR CATALOG $6 FOR HEADER POSTER GOLDEN GATE HOBBIES POBox 123 San Bruno CA 94066 TEL 415 952-3045 1 76 Model Aviation GZP C 904 478-6745 Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft Pro Line U G 43 West Nine Mile Rd Pensacola FL 32514 ~~2 * A Futaba Distributor er Inquiries Welcome * great weight penalty pay fiberglassing particularly proper technique followed method thinning catalyzed resin MEK blotting excess resin before has cured has covered previous issues Model Aviation necessary apply heavy resin coat balsasheeted surfaces penalty paid added weight far exceeds minimal benefit added strength Furthermore O6-oz glass cloth quite sufficient surfacing planes Comparing fiberglassing technique Super Coverite example would predict finish fibergiassed plane would weigh 227% carry comparison step further suppose built 1/5-scale DeHavilland Beaver used Balsarite Super Coy erite Primex finishing tech niqueand found finish failed achieve aluminum-sheeted appearance desired planning strategy second model plane could estimate 227% increase weight finishing materials lightweight glass cloth approach se lected might easily accommodated Schlueter Free Flight Models 3508 Poinsettia Ave Manhattan Beach Ca 90266 0 C PACIFIC ACE 0 BLACK BULLET RTIAL KITS plans&printedwvod PACIFiC ACE BLACK BULLET 20332530$470 40$665 ADD $200 SHIPPING FOR EACH 1t03 KIT ORDERCA RES ADO RI TAX Dealer Inquiries Invited WELLI TOLP YOU NOT TO STAND IN FRONT O THT ENGJ-N NEW IMPROVED dUm Wiliat Medd macre wouli POW *US PatRol No Des ** WANDIT * ealers Ivxded, * -- 6 * -I *10 ft CORD * *WetorDry * Stick Abrasives * *A Keen Machine gives exceptional *sanding control 101 excellent finish *5995Basic vcI 1 fIat Wand 1 each0 *xlRgvts *o595Bxida Special rid 2 lIar 1 naIlrxand sand 5 vi K grits9 * *129Dalaxe eExdes 3 hat 2 haIl rxand wandS 1 baIt wands 10 xl9 *K grits9 *Additional Wands Abrasives availabie *C * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 uite Texas 751499 December 1985 177 Futaba JR GLOW PLUG TAP 14-32 E8 4WtR HARRY HIGLEY 8 SONS INC P o Box 532 GLENWOOD ILL 60425 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX K AMA Membership143 Academy Av Research Dev12 Ace Radio Control Airtronics2 Altech MarketingCover 3 Astro Flight86 ISA9 n Built Models132 W~t flistributors144 165 Productions178 Enterprises146 24 yandTools178 154 Products16 Model Imports10 Model & Hobby Expo133 aroIlna Taffinder170 Cheveron164 Model Supply168 LrIc178 Condor Trading Co161 Consumers Guide26 Coverite29 151 Cox Hobbies147 iation150 ngineering174 Designs146 Systems24 jtm uenard Model Products172 Larry Dodge Aero Inc178 Dougs Hobby Shop94-97 Du-Bro Products Inc149 FAI Model Supply150 y Inc4 ass Master175 Models152 ost Products152 MfgCo176 27 IEC fl.Products162 i rroducts160 aur MI. rroducts176 Geometron Co171 Carl Goldherg Models5 153 Hobbies176 Products98175 Great Planes88 Harry B Hlgley& Sons166177 Historic Aviation25 Hobby Barn134-135 Hobby Horn170 Hobby Hideaway175 Hobby Lobby155 Hobby World Imports152 Holleys Silent Flight30 Ikon Northwest Co162 Indy RC Sales Inc138-1 40 International Modeler Show53 Jeff Ia Corp174 Jomar51 JTec136 K&BMfg172 K&S Engineering160 KandWEnt160 Kin Craft166 Knights Air133166 Kustom Kraftsmanship8 L&L Model Products18 Leading Edge157 Lindsey Micro Products166 Lone Star Models45 M&W Models162 MACS Products160 Master Kit176 McDaniel RC Service144 Messers Quality Model152 Micro Mark6-7 Micro Model Engineering150 Midwest Products175 Model Engineering Norwalk10 Model Ignition12 Model Magic Products47 Model Products Corp148 Model Rectifier CorpCover 2 Morrill-ADC168 Mutchlers Hobbies158-159 NEPRO174 Nor-Ray Products Inc55 North Products178 Off Ground Models163 Ohio Superstar156 PAC Model Supply176 PK Products129 Pacer Technology17 Peck-Polymers172 Penn Valley Hobby Center156 Peripheral Systems Inc28 Pica Productsis Polks Hobby31130-131 RC Buyers Guide 18 RC Video Magazine 150 RJL Industries 142 RJM Systems 162 Radio South 177 Repla-tech Intl 178 Robbe Modelsport 179 RoushMfg 170 SR Batteries176 SachsbyTG173 St Croix Park Falls28 Satellite City145 SavOn Hobbies49 Schlueter Free Flight Models177 Shamrock Competition Imports165 Sheldons Hobby Shop30 Sig Mfg16 Simcoe RC Aircraft Co13 Slim Line Mufflers148 Southeastern Air Crafters162 Standale Aircraft132 Sullivan Products1169 RC Sweitzer Enterprises129 T&D Fiberglass Spec 144 Tatone Prod Co 86 Tidewater Hobby Enterprises 55 Toledo RC Exposition 142 Top Flight Models Inc 87 Tower Hobbies 167 US Alpina85 VK Model Aircraft142 WE Technical Services 8 Wandit Manufacturing 177 Williams Bros 86 Wilshire Model Center 26 Windsor Propeller 144 Wing Mfg 16 Workshop Concepts World Engines Zenith Aviation RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS plane such Beaver fact lighterweightweight regardless material meth building techniques constructing sec- Another obvious conclusion drawnod Sure Micafllm pre-primed ond model could compensate forfrom experiment finishingcase lighter fibergiassing 15the small increase finishing materialtechniques add comparable amounts ofContinued page 180 ATHES ING MACHINES INE SHOP SUPPLIES S Fe Avetlon Modeler BLUE~DGE MACHINERY AND_TOOLS INC I0 Call oII f,e i-ASO-072-ASeeRHPrHSHHUHAI WOE ef Ic WV 562353AMHH7 MHHH8HCUHrHrE POAoeS36-YHeoioaeeWV25526 legE $100 boHr 200 Pugeel SILICONE TUBING O2550 SMALL 1 062 dl 1 83 00 MED1002 dl 0400$9000600 LANGE 1 125 dl 0000 81125 *2000 US CAN POSTPAID DODGE AERO INC 10210 MannIng Ave N Stiliwater MN 55082 178 Model Aviation flIII Ill ow, 11V1119 110111 2hour spectacular helicopter exploration Breathtaking music Critically acclaimed Details FREE VHS BETA Beerger Productions 32I7lt7AeUh La. 07102 /02 O10224I * SCALE DOCUMENTATION * SCALE DRAWINQSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1985 INTERNATIONAL AIRPLANE CATALOG48500 MCKENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send S 100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 NEWSPACESA FUEL CONTAINER FISHENYHUrBUS o 73/8 highE 91/8 THNgh Rigid PHIyHIh$IHHH INCIHEIHE THIIIH9 pI 8120 pEg FOHUNHArE Leck THMNg Through Cup North Products PO Box 18415 cleveland Heights OH 44118 ULinL 93Super Drone$1275 RC Shoulder-wing sport flier spans 68 uses 45-60 engine No 494HABOOB$400 CL Very lightweight sport/stunter flies wind power alone can adapted 049- 1 5 Cu glow engines Spans 39 No 495FW-1 90$425 RC Hand-launched all-balsa scalelike sport flier 1 0-1 5 engine spans 331/4 Part Dogfight Duo Two RC channels No 496P47 Thunderbolt$425 RO Characteristics like FW-1 90 Part Dogfight Duo Spans 33% No 153Slilietto CL Stunt model McDonald winner 19761 9801 982 FAI World Champ $ 375 No 239Blue Birils AC Ken Willards formation plane 4-channel 18 power 375 No 262Crashmasler CL Crash-proot trainer two nizes1 5-30- 35-40-power$125 No 299Gee Bee Sr Sparisler AC 1-scale Haftke tsr 91 power Prototype span 3011 Two halt sheets Ne 302Mint P16 RC Sarpnlus 049 docted tan sport tiler tsr 2-channel Balsa wings tail fuse structure$275 No 3101930 Fleet Biplane AC Sport Scale tsr 35-48 4-channel Wingspan 56 % scale Two sheets -$625 No 314Drake B AC Ken Willards flying boat 3-channel 15-power Ply tram land remnoable gear -$375 No 326Taylor Cab AC Dnn Sinus Schoolyard-Scale 049s 2-3 channel Spans 50 -$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope soaring -$200 No 356Pieces FF Indoor Easy B Aubber-power contest-winner hy W Van Gorder . $100 No 386Laser 200 AC Sport Scale replica ot championship Aerobatic Ilier Uses 40 power 4-5 channel Two sheets -61075 No 398Gee Bee ll1 RC Hatikes latest 1-scale spans 75 weighs 15 lh tiles 90 larger Pour sheets no doc- 62225 No 414Elecliic Spaiky AC electric powered tan flier tsr 05 motor 3-channel AC scaled api 939 rubber-power fuonrite9850 No 422Scooter AC Two-Meter Sailplane has won Nuts event 1982 1983 plus other contests$550 No 426Chioa CApper ACFahuloos 74-in span Sport Scale flying bout tor four 10 size engines aod 4-channel Three sheetsno doc $2000 No 430Imoside AC Zippy little sporister 1 0-1 5 power 3-channel AC -$400 Na 433Waits Up AC Electric-powered glider tor 2-3 channelo 035 motor spanO 52 No 437Kioiisher CL Profile Carrier plane spans 40% uses 35 engine - - -$600 INe 438Croloer PF Embryo Endurance rubber-power tan ship has big-model characteristics -$200 Ne 440Cavaler AC Old-Timer like new design has hoge wing br slow easy flights Far 35 power 3 channels Two sheets- -61725 No 441Nil Wil PP Hot small lightweight competition ship 15 power designer Horn] Murphy-- 475 No 442Lazy Duck AC Big canard sport flier tsr %A-09 power 2 channels Uses toam board parts - -6650 No 444Firehoit AC pusher canard sporllpattern uses 40 pusher engine 4-channel Has swept forward foam wings - 650 N 0446Le Crale AC Electric-powered sport tlier fur 05 motors 3-channels Two nersions parasol cabin6550 No 447hA Miss America AC Old-Timer %A Texaco model tsr 049 glow 2-channels$650 No 452Gee Bee Z AC Ouarter-scale spans 71% uses 90 power Pour sheets - -$1600 No 453Smoothie Prntile CL Profile rendition Bob Palmers soper-Stunter early Pifties 35 power$550 Ne 454Sweel P-3D PF Neat stick and-tissue Outdoor Aubber P30-class model isa cootnot-winner -$200 No 456HiTech 2001 AC Oucted-fan futuristic-looking canard 25-size engines Built-up construction Three sheets- -91175 No 457Spectra AC hlectric-power 05 size motor uses 3 different wings spurt soaring aerobatics-6700 Na 458Dauntleun CL Profile Carrier 15-power events Two sheets -6575 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size eogine 4 channels6650 Na 461Tinter Barnstormer CL Famous unflapped Stunter late Porties Uses 35 engine -6650 Ne 462Pemilia P0 FF Jumbo guSher Scale WW Italian observation plane -$400 No 463Platykelmiothes VE AC %A Pylon racer uses life ply built-up structure fur strength lightness- - $ 475 Ne 465Blue Max AC Pan-fly sporluter 40-size engines spans 52 Lightweight structure - -$700 Ne 466Competitor CL Stuntertor 60 power has 650 sq wing area - -$575 Na 467Alco Sport FP Aubber Scale design woo 83 Nato f designer Don SrulI Wingspan 26 in-9250 Nn 468Smoother CL Stunter 29135 power Design based oo hybrid SinoothielNobler$675 No 469Don Kichot AC Sport Scale rendering Polish homebuilt pusher Spans 75 uses 40-size 4-cycle engine Foursheets $2075 No 470Stinker 9C Mid-wing sportoter uses 40145 four-stroke engine spans 50% tail-dragger -6650 No 473Tocane AC Sport scale turboprop trainer spans 66 uses 60175 engines Two sheets. No 474Pacer 15 FF Nordic A-i Towline Glider won 1983 World Champs - -$500 No 475Geophysical CL Slow Combat model uses geodetic wiog construction 36 engine Two-sheet plan has partspatterns - 0 No 476ManIa 250 PP competition Ak plane has manta-ray-shaped wing spans 43 - 00 No 477Maodailo CL Sport Stunter uses sport 15 engine spans 35 in- 25 No 478Buttercup AC Cute elfin sportoter uses micro 2-ch AC pulse-rudder Spans 27 020 035 power- -$300 No 479Four-Stroke Booster ftC SportlAerobatics uhip has 1 920s styling uses 90 4-stroke engine spans 8S 2 sheets$1100 No 480Bidiculoss CL Pabuloas competition Stunter has 550 sq wing area flies TO 0491051 spans 47% in$600 No 481Europa 9C Sailplane PAl competition has fiberglass fuselage faam wings wing flaps stabilator tail Spans 110 in$700 No 482GeldesA8er AC SportlAerobatic model looks like Golden Age sportster 60 engines spans 62 -6750 Ne 483COS Nawk Ultralight PP Outdoor Gas Scale plane ones CO-2 power spans 29 - 00 Ne 484Aerneca K AC Osarter-Scale 30s Iightplane spans 9 ft. uses 12 ca 2-cyl 4-stroke engine weighs 11 y lbThree sheets$1975 No 485Hawker Hooter CL Fun-scale British et fighter has 16%-in foam wing uses %A power- 75 No 486Miles-Atwood Special AC Sport-Scale Golden Age air racer uses 21 engine spans 45 in-- $825 No 487Cap 21 AC Scale Aerobatic plane 40-size engine spans 62 Two sheets- -$1000 Na 488MB-i PP Jumbo Aubber Scale 1920-era Thomas Morse Scout biplane spans 37 00 Ne 489Undertaker CL Poam-wisged Past Combat plane 36 engine spans either 45 47 in- - 00 No 490Weekender AC Low-wing sport flier 20-size 4-stroke engine spans 47% -6575 No 491yellow Peril CL Advanced trainer all-balsa spans 23 uses %A power6325 No 491 Circulator PP A-i Towline Glider spans silo uses fiberglass tail boom circle-tow mechanism - 6 250 Circle numbers plans wish order 193239262299302 326332358386398 426430433437438 442444446447452 456457458460461 465466467468469 474475476477478 481482483484485 488489490491492 310 414 440 453 462 470 479 486 493 314 422 441 454 463 473 480 487 494 495496 Plan price leciedos firSi class poslage US delivery Which Air Mail over 300 miles orders oulside Ihe US lease add $250 Air Mail $125 surface mail Make check money order payable US funds Model Aviation c/u AMA 1910 Samuel Morse tIn Reoton VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ NAME STREET CITY STATE ZIP oz glass cloth keep mind data expressing small percentage total weight aircraft hypothetical 60-size plane weighed 8 lb 128 oz finishing materials add-on weight would vary 35% Micaflim 75% 15-oz glass cloth total usually tolerable range model aircraft An important consideration based upon results application data next project course finish ing techniques will differ condi tions experiment probably sufficiently alter outcome signifi cantly applying data will need estimate total surface area aircraft covered apply estimate follows X Weight oz increase estimate W Observed weight oz experiment Estimated surface area plane WA 2100 Dont forget add both top bottom wing surface areas plus tail surfaces guess fuselage area calculation may help select method over another clear however weight alone important influencing factor selecting finishing method As stated before personal prference de sire special effect skill tools hand hope durability weather conditions under work influences experiment simply removes possible preconceptions about weight build-up aspect decision-making process Weight paint included experiment simply because would add too complexities design experiment wide variety paints available us should subject future experiment Basical ly however white paints heavy clear lightest Pigment adds weight paint can add ounces unsuspected manner will inter esting technically challenging criti cally compare two-part epoxies poly isothiocyanates lacquers enamels onepart epoxies poly-S Voisin/SruII Continued page 89 testing Add clay get center gravity CG point shown plans Adjust model turn wide circles against torque left left handed prop means forward rudder ailerons As canards little model can handle much power wish use larger motors can achieve exhilarating high-climbing flights would have taken Gabriels breath away 180 Model Aviation 0 0 csJ n 0 -00 O3 00 zoo m 050 0 s oo us 0 -to GO 90 flb 000 0 00 00 0000 oa 000 80 Old C 00 us 0 0000 00 0 000 Ci 0 00 00~ Os 0 J 0 E00 U Os 000 N coo Is
Edition: Model Aviation - 1985/12
Page Numbers: 92, 93, 175, 176, 177, 178, 180
The experiment study weight build-up severai covering surface preparation techniqut. some can seen information presented provides added insight heip pick covering method modeis much weight various covering prepping materials add models 92 Model Aviation WHEN FINISHiNG MODEL weight added often Its con-method available intormation Indetermining whether project troll e dstead rely upon past experiences will successful flier possible to experi meni experiences RC colleagues ruin otherwise sound project poor show j u st howThese hands-on observations helpful choice finishing methodbut always accurate Weight often cited planning next model would principle reasons selecting methodbeneficial able estimate accurately material over another usually littlethe expected weight build-up method consideration given total addedversus another might give us greater weight comes balsa preparationversatility choice projects material priming Often reasons experiment possible make wise choice finishingdesigned accurately measure weight build-up various finishing techniques hoped data would provide basis comparing method other giving aeromodeler clearer perspective differences similari ties between several popular approaches thing must made clear before proceeding weight alone should factor selecting finishing method Strength durability type aircraft mod eled desired appearance time applica tion availability materials tools personal skill preference fluence decision experiment Five finishing materials selected silk aluminum MonoKote Super Coverite Micaflim glass cloth covering materials applied standard fashion Balsarite treatment balsa con ditions controlled experi mental laboratory silk purchased local fabric shop weight basis compared iden tically K&B silk Aluminum MonoKote Top Flite Models Super Coverite pre-primed Coverite Micafilm pur chased local hobby shop Two types glass cloth selected lightweight 06 oz/sq yd purchased Dan Par sons Products medium 15 02/sq yd Sig Manufacturing Co order make critical analytical com parisons 30 test sheets 1/16 balsa prepared measuring 5 x 4 21 sq test sheets labeled carefully weighed analytical balance sensitive milligram Mettler Analytical Balance addition three blank test sheets weighed throughout experiment treated other way blank balsa sheets served internal check control possible weight gain loss due humidity changes results experiment sum marized Table 1 principal methods finishing listed first column iron-on coverings two sub-groups analyzed no balsa prepara tion except sanding other Balsarite treatment second column lists weight build-up following Balsarite ap plication amounts 032 gm/21 sq about 1 oz total 60-size plane estimated 2100 sq total surface area silk-and-dope method balsa prepared three coats Sig balsa filler sanded between coat third column lists added weight application covering pre primed Micafilni added about 1 gm/test sheet up 35 oz/60-size plane difficulty working Micafilm because iron set too hot Adhesion much improved perfect after cool ing iron 2500F Balsarite improved adhesion shown Table 1 will add little final total weight about 1 oz Aluminum MonoKote surprisingly Continued page 175 Table 1 Weight Balsa Prep icaflim no Balsarite Balsarite030 Aluminum no Balsarite MonoKote Balsarite Super no Balsarite Coverite Balsarite Silk Dope Polyester Resin Glass 060 02/sq yd Cloth 15 ozIsq yd Various Finishing Techniques 1 Prime 098 128 156156 034157191 108024132 032108023163 346 452 550 674 466 575 047070060177624 Primary application 109 160 Cyanoacrylate Glass Cloth 15 02/sq yd195 Secondary application 039 045 052 067 200 272 039234 705 959 825 1 Data first four columns expressed grams gin value represents average three separate experimental determinations column records weight increase measured test sheet 5 x 4 121 sq 2 Projectedweight build-up expressed oz121 00 sq 2100 sq estimate total surface area 60-size plane estimate includes finishing steps through surface priming step Painting included ounce equals 2835 gin 3 Primex applied sanded 4 Clear dope applied sanded 5 Dupont lOOS gray primer applied sanded December 1985 93 Above Based test results author estimated weight increase 13 oz fibergiassing 1/5scaie Corsair Actual weight gained including primer 15 oz O6-oz cloth used sheeted surfaces Below Added wainht heavy fiber alassina techniqus enn excesiva Amuthnr ARUn 7am 10 fn h9 CoveringTotal wt Projected wt materialgainbuild-up2 m oz/21 OOsq 098 098 fuselage frame over plans After assembly dry smooth both sides sanding block add plywood doub lers Round off fuselage edges sandpaper except stabilizer will mounted Cut out desired engine weight mount modules sand Cut out tail parts cockpit dorsal fin wing flaps sand smooth Sand some taper flaps elevator desired Cover parts lightweight heatshrink material Japanese tissue clear dope could used covering will probably require maintenance Add color dope trim desired Final assembly begins wing-fuse lage intersection Slip outboard tip cleaning wing opening sandpaper stick required Slip wing off its centered position temporarily coat center section top bottom thoroughly white glue Slip wing back proper final position Force white glue voids Align wing properly apply thin CyA entire joint unit will strong enough handle Make fillet baking soda around leading edge wing both sides apply CyA Clean covering material sur faces joined install horizontal stabilizer fuselage being careful align wing As wing joint use white glue CyA baking soda/ CyA fillet Similarly install fin rudder Slip flap joiner wire through fuselage Drill flaps Cut slots hinges Install flap elevator hinges shown plans cer tain run pins through hinges make sure wont come out Install control horns Rig pushrod bellcrank next last outside hole flap hornand pushrod last hole flap horn elevator Check plans control surface deflec tions Balance model shown plans sensitive controls move center gravity CG rearward less sensitive move CG forward May flying days windy Weight/Poffenbarger Continued page 93 heavy retrospect non-metallic Mono Kote variety also should have tested According experiment square inch 60-size 2100 sq sur photo Stuecker taken Geophysical article appeared May1985 issue Model Aviation noticed reader wrote MA requesting information wind flier served asthe structural format forthe Geophysical simpleand innocentbeglnningscamethe end product theform article HOYHXDEAWAYIIOBBYHTDEAWAYHOB9YHIAWAYHOBBYHIDAWAY FAMOUS BRITISH DIESELS AEROMODELLER PLANS SPARES M/E PAw D/C 3rd PRINTING CATALOG - DIESEL HANDBOOK $350 pp HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 Ho00YHrOEAwAHO0BYHIDEAWAflIO0BY9IDEAWAYHOB0Y4IDEAW 3 December 1985 175 FIBERGLASS COWLS 70 cowls eelpants Sig Pica Top-Flite Jemco Nosen Pilot Staflord Radials Behrens Garmhausen W E Tech other kits plans One-piece laminated construction handlaid fiberglass strong hut lightweight Send SASE price list please inclpde names models interested parts call between DAM 0 PM EDT information COD ordering hope hear youl 703 890-6017 Dept MA St 1 Sex 530 Geedview VA 24095 PAC MODEL SUPPLY WrCAiV4 203 575-0916 Flight-Proven DesignsTemp 203 393-1990 Balsa Construction 5-6 lbs Cessna 15040 Powered 62Easy Construction 110-15 hrs Stable Fliers Mooney 40 Powered 62Scale Like Appearance Slow Flying Capabilities Cherokee 40 Powered 604955 ea plus $250 UPS Cherokee 1/3 ScaleContest Proveni 23 place Ken Barnes200 plus 800 shipping Cessna 15025 Powered 50 3S plus $250 UPS NEW Firemaster BIpe5667 lbs60 Powered 6995 llntroductory Pricel Coming Soon 60 Powered Pattern Ships MasterCard ers Invited Meier Sr Owner/Pres lie Perugini Assist TARBaby TRANSMITTER CASE /Especially Turn-around thisAn inexpensive rugged molded .L 850 sq 120 4 cyclecase protect expensive iW powered Ron Ohidgey designtransmitter both two stick smooth solid performersingle stick transmitters Brown Rib templates computerleather grain aluminum trim plotted Plans construc lion hints locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing br plug-in wings Included pair ol special slip-fit phenolic sockets build wing structure Now size models 78 dia x 2 $ 895 1 dies 2$ 995 1 dia x3- $1495 Gator RIO Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 aster SION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 13141 221-8803 MANUFACTURERS OF SPORT PATTERN STINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 RBIPE NEW WING MOUNTING SET wing mounting system developed Ron Chidgey last neal accurate stays tight Three nylon brackets screws machined wing blocks included -$695 See Dealer Order Direct Include $150 Per Item UPS Information latest engines prices CALL OR WRITE FOR FREE CATALOG VISA MaslerCard Accepted F 0 X MFG CO 5305 TOWSON AVE FORT SMITH AR 72901 501 646-1656 face plane covered aluminum MonoKote total add-on weight would 55 oz Super Coverite lighter expected though addition Balsarite prepration balsa brings very close aluminum MonoKote overal weight build-up Su per Coverite joy work compared other methods finishing recommendead primer Primex very light respect silk dope can seen lightness silk overcome heaviness filler balsa preparation clear dope used both appliction priming steps Fibergiassing performed poly ester resin thinned MEK methyl ethyl ketone applied soft brush Excess resin blotted tissue paper little no sanding needed approach Comparison 06 oz/sq yd 1 5-oz cloth shows medium-weight cloth absorbs considerably resin primer giving rise 25oz additional build-up over 06-oz cloth surprising discovery though fibergiassing did result greatly-increased weight build-up com pared other methods certainly due method resin applica tion very satisfactory highly recommended resin poured blotted thinned heavy resin resi due will accumulate sanding will difficult Recently application glass cloth cyanoacrylate CyA glues has recommended much lighter method Using CyA 1 5-oz cloth did result much weight saving however apparent gray primer could sanded off better because cloth weave less visible blot ted-resin technique CyA method re quires excellent ventilation lot skill avoid bumps thready problems however keep mind experi ment weight build-up critical comparison ease application finish ing techniques Perhaps striking result ex periment weight build-up finding YS ENGINES HATORI HEADERS TETTRA HARDWARE ATLANTA- OMEGA SEE YOUR LOCAL DEALER SEND $1 FOR CATALOG $6 FOR HEADER POSTER GOLDEN GATE HOBBIES POBox 123 San Bruno CA 94066 TEL 415 952-3045 1 76 Model Aviation GZP C 904 478-6745 Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft Pro Line U G 43 West Nine Mile Rd Pensacola FL 32514 ~~2 * A Futaba Distributor er Inquiries Welcome * great weight penalty pay fiberglassing particularly proper technique followed method thinning catalyzed resin MEK blotting excess resin before has cured has covered previous issues Model Aviation necessary apply heavy resin coat balsasheeted surfaces penalty paid added weight far exceeds minimal benefit added strength Furthermore O6-oz glass cloth quite sufficient surfacing planes Comparing fiberglassing technique Super Coverite example would predict finish fibergiassed plane would weigh 227% carry comparison step further suppose built 1/5-scale DeHavilland Beaver used Balsarite Super Coy erite Primex finishing tech niqueand found finish failed achieve aluminum-sheeted appearance desired planning strategy second model plane could estimate 227% increase weight finishing materials lightweight glass cloth approach se lected might easily accommodated Schlueter Free Flight Models 3508 Poinsettia Ave Manhattan Beach Ca 90266 0 C PACIFIC ACE 0 BLACK BULLET RTIAL KITS plans&printedwvod PACIFiC ACE BLACK BULLET 20332530$470 40$665 ADD $200 SHIPPING FOR EACH 1t03 KIT ORDERCA RES ADO RI TAX Dealer Inquiries Invited WELLI TOLP YOU NOT TO STAND IN FRONT O THT ENGJ-N NEW IMPROVED dUm Wiliat Medd macre wouli POW *US PatRol No Des ** WANDIT * ealers Ivxded, * -- 6 * -I *10 ft CORD * *WetorDry * Stick Abrasives * *A Keen Machine gives exceptional *sanding control 101 excellent finish *5995Basic vcI 1 fIat Wand 1 each0 *xlRgvts *o595Bxida Special rid 2 lIar 1 naIlrxand sand 5 vi K grits9 * *129Dalaxe eExdes 3 hat 2 haIl rxand wandS 1 baIt wands 10 xl9 *K grits9 *Additional Wands Abrasives availabie *C * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 uite Texas 751499 December 1985 177 Futaba JR GLOW PLUG TAP 14-32 E8 4WtR HARRY HIGLEY 8 SONS INC P o Box 532 GLENWOOD ILL 60425 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX K AMA Membership143 Academy Av Research Dev12 Ace Radio Control Airtronics2 Altech MarketingCover 3 Astro Flight86 ISA9 n Built Models132 W~t flistributors144 165 Productions178 Enterprises146 24 yandTools178 154 Products16 Model Imports10 Model & Hobby Expo133 aroIlna Taffinder170 Cheveron164 Model Supply168 LrIc178 Condor Trading Co161 Consumers Guide26 Coverite29 151 Cox Hobbies147 iation150 ngineering174 Designs146 Systems24 jtm uenard Model Products172 Larry Dodge Aero Inc178 Dougs Hobby Shop94-97 Du-Bro Products Inc149 FAI Model Supply150 y Inc4 ass Master175 Models152 ost Products152 MfgCo176 27 IEC fl.Products162 i rroducts160 aur MI. rroducts176 Geometron Co171 Carl Goldherg Models5 153 Hobbies176 Products98175 Great Planes88 Harry B Hlgley& Sons166177 Historic Aviation25 Hobby Barn134-135 Hobby Horn170 Hobby Hideaway175 Hobby Lobby155 Hobby World Imports152 Holleys Silent Flight30 Ikon Northwest Co162 Indy RC Sales Inc138-1 40 International Modeler Show53 Jeff Ia Corp174 Jomar51 JTec136 K&BMfg172 K&S Engineering160 KandWEnt160 Kin Craft166 Knights Air133166 Kustom Kraftsmanship8 L&L Model Products18 Leading Edge157 Lindsey Micro Products166 Lone Star Models45 M&W Models162 MACS Products160 Master Kit176 McDaniel RC Service144 Messers Quality Model152 Micro Mark6-7 Micro Model Engineering150 Midwest Products175 Model Engineering Norwalk10 Model Ignition12 Model Magic Products47 Model Products Corp148 Model Rectifier CorpCover 2 Morrill-ADC168 Mutchlers Hobbies158-159 NEPRO174 Nor-Ray Products Inc55 North Products178 Off Ground Models163 Ohio Superstar156 PAC Model Supply176 PK Products129 Pacer Technology17 Peck-Polymers172 Penn Valley Hobby Center156 Peripheral Systems Inc28 Pica Productsis Polks Hobby31130-131 RC Buyers Guide 18 RC Video Magazine 150 RJL Industries 142 RJM Systems 162 Radio South 177 Repla-tech Intl 178 Robbe Modelsport 179 RoushMfg 170 SR Batteries176 SachsbyTG173 St Croix Park Falls28 Satellite City145 SavOn Hobbies49 Schlueter Free Flight Models177 Shamrock Competition Imports165 Sheldons Hobby Shop30 Sig Mfg16 Simcoe RC Aircraft Co13 Slim Line Mufflers148 Southeastern Air Crafters162 Standale Aircraft132 Sullivan Products1169 RC Sweitzer Enterprises129 T&D Fiberglass Spec 144 Tatone Prod Co 86 Tidewater Hobby Enterprises 55 Toledo RC Exposition 142 Top Flight Models Inc 87 Tower Hobbies 167 US Alpina85 VK Model Aircraft142 WE Technical Services 8 Wandit Manufacturing 177 Williams Bros 86 Wilshire Model Center 26 Windsor Propeller 144 Wing Mfg 16 Workshop Concepts World Engines Zenith Aviation RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS plane such Beaver fact lighterweightweight regardless material meth building techniques constructing sec- Another obvious conclusion drawnod Sure Micafllm pre-primed ond model could compensate forfrom experiment finishingcase lighter fibergiassing 15the small increase finishing materialtechniques add comparable amounts ofContinued page 180 ATHES ING MACHINES INE SHOP SUPPLIES S Fe Avetlon Modeler BLUE~DGE MACHINERY AND_TOOLS INC I0 Call oII f,e i-ASO-072-ASeeRHPrHSHHUHAI WOE ef Ic WV 562353AMHH7 MHHH8HCUHrHrE POAoeS36-YHeoioaeeWV25526 legE $100 boHr 200 Pugeel SILICONE TUBING O2550 SMALL 1 062 dl 1 83 00 MED1002 dl 0400$9000600 LANGE 1 125 dl 0000 81125 *2000 US CAN POSTPAID DODGE AERO INC 10210 MannIng Ave N Stiliwater MN 55082 178 Model Aviation flIII Ill ow, 11V1119 110111 2hour spectacular helicopter exploration Breathtaking music Critically acclaimed Details FREE VHS BETA Beerger Productions 32I7lt7AeUh La. 07102 /02 O10224I * SCALE DOCUMENTATION * SCALE DRAWINQSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1985 INTERNATIONAL AIRPLANE CATALOG48500 MCKENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send S 100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 NEWSPACESA FUEL CONTAINER FISHENYHUrBUS o 73/8 highE 91/8 THNgh Rigid PHIyHIh$IHHH INCIHEIHE THIIIH9 pI 8120 pEg FOHUNHArE Leck THMNg Through Cup North Products PO Box 18415 cleveland Heights OH 44118 ULinL 93Super Drone$1275 RC Shoulder-wing sport flier spans 68 uses 45-60 engine No 494HABOOB$400 CL Very lightweight sport/stunter flies wind power alone can adapted 049- 1 5 Cu glow engines Spans 39 No 495FW-1 90$425 RC Hand-launched all-balsa scalelike sport flier 1 0-1 5 engine spans 331/4 Part Dogfight Duo Two RC channels No 496P47 Thunderbolt$425 RO Characteristics like FW-1 90 Part Dogfight Duo Spans 33% No 153Slilietto CL Stunt model McDonald winner 19761 9801 982 FAI World Champ $ 375 No 239Blue Birils AC Ken Willards formation plane 4-channel 18 power 375 No 262Crashmasler CL Crash-proot trainer two nizes1 5-30- 35-40-power$125 No 299Gee Bee Sr Sparisler AC 1-scale Haftke tsr 91 power Prototype span 3011 Two halt sheets Ne 302Mint P16 RC Sarpnlus 049 docted tan sport tiler tsr 2-channel Balsa wings tail fuse structure$275 No 3101930 Fleet Biplane AC Sport Scale tsr 35-48 4-channel Wingspan 56 % scale Two sheets -$625 No 314Drake B AC Ken Willards flying boat 3-channel 15-power Ply tram land remnoable gear -$375 No 326Taylor Cab AC Dnn Sinus Schoolyard-Scale 049s 2-3 channel Spans 50 -$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope soaring -$200 No 356Pieces FF Indoor Easy B Aubber-power contest-winner hy W Van Gorder . $100 No 386Laser 200 AC Sport Scale replica ot championship Aerobatic Ilier Uses 40 power 4-5 channel Two sheets -61075 No 398Gee Bee ll1 RC Hatikes latest 1-scale spans 75 weighs 15 lh tiles 90 larger Pour sheets no doc- 62225 No 414Elecliic Spaiky AC electric powered tan flier tsr 05 motor 3-channel AC scaled api 939 rubber-power fuonrite9850 No 422Scooter AC Two-Meter Sailplane has won Nuts event 1982 1983 plus other contests$550 No 426Chioa CApper ACFahuloos 74-in span Sport Scale flying bout tor four 10 size engines aod 4-channel Three sheetsno doc $2000 No 430Imoside AC Zippy little sporister 1 0-1 5 power 3-channel AC -$400 Na 433Waits Up AC Electric-powered glider tor 2-3 channelo 035 motor spanO 52 No 437Kioiisher CL Profile Carrier plane spans 40% uses 35 engine - - -$600 INe 438Croloer PF Embryo Endurance rubber-power tan ship has big-model characteristics -$200 Ne 440Cavaler AC Old-Timer like new design has hoge wing br slow easy flights Far 35 power 3 channels Two sheets- -61725 No 441Nil Wil PP Hot small lightweight competition ship 15 power designer Horn] Murphy-- 475 No 442Lazy Duck AC Big canard sport flier tsr %A-09 power 2 channels Uses toam board parts - -6650 No 444Firehoit AC pusher canard sporllpattern uses 40 pusher engine 4-channel Has swept forward foam wings - 650 N 0446Le Crale AC Electric-powered sport tlier fur 05 motors 3-channels Two nersions parasol cabin6550 No 447hA Miss America AC Old-Timer %A Texaco model tsr 049 glow 2-channels$650 No 452Gee Bee Z AC Ouarter-scale spans 71% uses 90 power Pour sheets - -$1600 No 453Smoothie Prntile CL Profile rendition Bob Palmers soper-Stunter early Pifties 35 power$550 Ne 454Sweel P-3D PF Neat stick and-tissue Outdoor Aubber P30-class model isa cootnot-winner -$200 No 456HiTech 2001 AC Oucted-fan futuristic-looking canard 25-size engines Built-up construction Three sheets- -91175 No 457Spectra AC hlectric-power 05 size motor uses 3 different wings spurt soaring aerobatics-6700 Na 458Dauntleun CL Profile Carrier 15-power events Two sheets -6575 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size eogine 4 channels6650 Na 461Tinter Barnstormer CL Famous unflapped Stunter late Porties Uses 35 engine -6650 Ne 462Pemilia P0 FF Jumbo guSher Scale WW Italian observation plane -$400 No 463Platykelmiothes VE AC %A Pylon racer uses life ply built-up structure fur strength lightness- - $ 475 Ne 465Blue Max AC Pan-fly sporluter 40-size engines spans 52 Lightweight structure - -$700 Ne 466Competitor CL Stuntertor 60 power has 650 sq wing area - -$575 Na 467Alco Sport FP Aubber Scale design woo 83 Nato f designer Don SrulI Wingspan 26 in-9250 Nn 468Smoother CL Stunter 29135 power Design based oo hybrid SinoothielNobler$675 No 469Don Kichot AC Sport Scale rendering Polish homebuilt pusher Spans 75 uses 40-size 4-cycle engine Foursheets $2075 No 470Stinker 9C Mid-wing sportoter uses 40145 four-stroke engine spans 50% tail-dragger -6650 No 473Tocane AC Sport scale turboprop trainer spans 66 uses 60175 engines Two sheets. No 474Pacer 15 FF Nordic A-i Towline Glider won 1983 World Champs - -$500 No 475Geophysical CL Slow Combat model uses geodetic wiog construction 36 engine Two-sheet plan has partspatterns - 0 No 476ManIa 250 PP competition Ak plane has manta-ray-shaped wing spans 43 - 00 No 477Maodailo CL Sport Stunter uses sport 15 engine spans 35 in- 25 No 478Buttercup AC Cute elfin sportoter uses micro 2-ch AC pulse-rudder Spans 27 020 035 power- -$300 No 479Four-Stroke Booster ftC SportlAerobatics uhip has 1 920s styling uses 90 4-stroke engine spans 8S 2 sheets$1100 No 480Bidiculoss CL Pabuloas competition Stunter has 550 sq wing area flies TO 0491051 spans 47% in$600 No 481Europa 9C Sailplane PAl competition has fiberglass fuselage faam wings wing flaps stabilator tail Spans 110 in$700 No 482GeldesA8er AC SportlAerobatic model looks like Golden Age sportster 60 engines spans 62 -6750 Ne 483COS Nawk Ultralight PP Outdoor Gas Scale plane ones CO-2 power spans 29 - 00 Ne 484Aerneca K AC Osarter-Scale 30s Iightplane spans 9 ft. uses 12 ca 2-cyl 4-stroke engine weighs 11 y lbThree sheets$1975 No 485Hawker Hooter CL Fun-scale British et fighter has 16%-in foam wing uses %A power- 75 No 486Miles-Atwood Special AC Sport-Scale Golden Age air racer uses 21 engine spans 45 in-- $825 No 487Cap 21 AC Scale Aerobatic plane 40-size engine spans 62 Two sheets- -$1000 Na 488MB-i PP Jumbo Aubber Scale 1920-era Thomas Morse Scout biplane spans 37 00 Ne 489Undertaker CL Poam-wisged Past Combat plane 36 engine spans either 45 47 in- - 00 No 490Weekender AC Low-wing sport flier 20-size 4-stroke engine spans 47% -6575 No 491yellow Peril CL Advanced trainer all-balsa spans 23 uses %A power6325 No 491 Circulator PP A-i Towline Glider spans silo uses fiberglass tail boom circle-tow mechanism - 6 250 Circle numbers plans wish order 193239262299302 326332358386398 426430433437438 442444446447452 456457458460461 465466467468469 474475476477478 481482483484485 488489490491492 310 414 440 453 462 470 479 486 493 314 422 441 454 463 473 480 487 494 495496 Plan price leciedos firSi class poslage US delivery Which Air Mail over 300 miles orders oulside Ihe US lease add $250 Air Mail $125 surface mail Make check money order payable US funds Model Aviation c/u AMA 1910 Samuel Morse tIn Reoton VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ NAME STREET CITY STATE ZIP oz glass cloth keep mind data expressing small percentage total weight aircraft hypothetical 60-size plane weighed 8 lb 128 oz finishing materials add-on weight would vary 35% Micaflim 75% 15-oz glass cloth total usually tolerable range model aircraft An important consideration based upon results application data next project course finish ing techniques will differ condi tions experiment probably sufficiently alter outcome signifi cantly applying data will need estimate total surface area aircraft covered apply estimate follows X Weight oz increase estimate W Observed weight oz experiment Estimated surface area plane WA 2100 Dont forget add both top bottom wing surface areas plus tail surfaces guess fuselage area calculation may help select method over another clear however weight alone important influencing factor selecting finishing method As stated before personal prference de sire special effect skill tools hand hope durability weather conditions under work influences experiment simply removes possible preconceptions about weight build-up aspect decision-making process Weight paint included experiment simply because would add too complexities design experiment wide variety paints available us should subject future experiment Basical ly however white paints heavy clear lightest Pigment adds weight paint can add ounces unsuspected manner will inter esting technically challenging criti cally compare two-part epoxies poly isothiocyanates lacquers enamels onepart epoxies poly-S Voisin/SruII Continued page 89 testing Add clay get center gravity CG point shown plans Adjust model turn wide circles against torque left left handed prop means forward rudder ailerons As canards little model can handle much power wish use larger motors can achieve exhilarating high-climbing flights would have taken Gabriels breath away 180 Model Aviation 0 0 csJ n 0 -00 O3 00 zoo m 050 0 s oo us 0 -to GO 90 flb 000 0 00 00 0000 oa 000 80 Old C 00 us 0 0000 00 0 000 Ci 0 00 00~ Os 0 J 0 E00 U Os 000 N coo Is
Edition: Model Aviation - 1985/12
Page Numbers: 92, 93, 175, 176, 177, 178, 180
The experiment study weight build-up severai covering surface preparation techniqut. some can seen information presented provides added insight heip pick covering method modeis much weight various covering prepping materials add models 92 Model Aviation WHEN FINISHiNG MODEL weight added often Its con-method available intormation Indetermining whether project troll e dstead rely upon past experiences will successful flier possible to experi meni experiences RC colleagues ruin otherwise sound project poor show j u st howThese hands-on observations helpful choice finishing methodbut always accurate Weight often cited planning next model would principle reasons selecting methodbeneficial able estimate accurately material over another usually littlethe expected weight build-up method consideration given total addedversus another might give us greater weight comes balsa preparationversatility choice projects material priming Often reasons experiment possible make wise choice finishingdesigned accurately measure weight build-up various finishing techniques hoped data would provide basis comparing method other giving aeromodeler clearer perspective differences similari ties between several popular approaches thing must made clear before proceeding weight alone should factor selecting finishing method Strength durability type aircraft mod eled desired appearance time applica tion availability materials tools personal skill preference fluence decision experiment Five finishing materials selected silk aluminum MonoKote Super Coverite Micaflim glass cloth covering materials applied standard fashion Balsarite treatment balsa con ditions controlled experi mental laboratory silk purchased local fabric shop weight basis compared iden tically K&B silk Aluminum MonoKote Top Flite Models Super Coverite pre-primed Coverite Micafilm pur chased local hobby shop Two types glass cloth selected lightweight 06 oz/sq yd purchased Dan Par sons Products medium 15 02/sq yd Sig Manufacturing Co order make critical analytical com parisons 30 test sheets 1/16 balsa prepared measuring 5 x 4 21 sq test sheets labeled carefully weighed analytical balance sensitive milligram Mettler Analytical Balance addition three blank test sheets weighed throughout experiment treated other way blank balsa sheets served internal check control possible weight gain loss due humidity changes results experiment sum marized Table 1 principal methods finishing listed first column iron-on coverings two sub-groups analyzed no balsa prepara tion except sanding other Balsarite treatment second column lists weight build-up following Balsarite ap plication amounts 032 gm/21 sq about 1 oz total 60-size plane estimated 2100 sq total surface area silk-and-dope method balsa prepared three coats Sig balsa filler sanded between coat third column lists added weight application covering pre primed Micafilni added about 1 gm/test sheet up 35 oz/60-size plane difficulty working Micafilm because iron set too hot Adhesion much improved perfect after cool ing iron 2500F Balsarite improved adhesion shown Table 1 will add little final total weight about 1 oz Aluminum MonoKote surprisingly Continued page 175 Table 1 Weight Balsa Prep icaflim no Balsarite Balsarite030 Aluminum no Balsarite MonoKote Balsarite Super no Balsarite Coverite Balsarite Silk Dope Polyester Resin Glass 060 02/sq yd Cloth 15 ozIsq yd Various Finishing Techniques 1 Prime 098 128 156156 034157191 108024132 032108023163 346 452 550 674 466 575 047070060177624 Primary application 109 160 Cyanoacrylate Glass Cloth 15 02/sq yd195 Secondary application 039 045 052 067 200 272 039234 705 959 825 1 Data first four columns expressed grams gin value represents average three separate experimental determinations column records weight increase measured test sheet 5 x 4 121 sq 2 Projectedweight build-up expressed oz121 00 sq 2100 sq estimate total surface area 60-size plane estimate includes finishing steps through surface priming step Painting included ounce equals 2835 gin 3 Primex applied sanded 4 Clear dope applied sanded 5 Dupont lOOS gray primer applied sanded December 1985 93 Above Based test results author estimated weight increase 13 oz fibergiassing 1/5scaie Corsair Actual weight gained including primer 15 oz O6-oz cloth used sheeted surfaces Below Added wainht heavy fiber alassina techniqus enn excesiva Amuthnr ARUn 7am 10 fn h9 CoveringTotal wt Projected wt materialgainbuild-up2 m oz/21 OOsq 098 098 fuselage frame over plans After assembly dry smooth both sides sanding block add plywood doub lers Round off fuselage edges sandpaper except stabilizer will mounted Cut out desired engine weight mount modules sand Cut out tail parts cockpit dorsal fin wing flaps sand smooth Sand some taper flaps elevator desired Cover parts lightweight heatshrink material Japanese tissue clear dope could used covering will probably require maintenance Add color dope trim desired Final assembly begins wing-fuse lage intersection Slip outboard tip cleaning wing opening sandpaper stick required Slip wing off its centered position temporarily coat center section top bottom thoroughly white glue Slip wing back proper final position Force white glue voids Align wing properly apply thin CyA entire joint unit will strong enough handle Make fillet baking soda around leading edge wing both sides apply CyA Clean covering material sur faces joined install horizontal stabilizer fuselage being careful align wing As wing joint use white glue CyA baking soda/ CyA fillet Similarly install fin rudder Slip flap joiner wire through fuselage Drill flaps Cut slots hinges Install flap elevator hinges shown plans cer tain run pins through hinges make sure wont come out Install control horns Rig pushrod bellcrank next last outside hole flap hornand pushrod last hole flap horn elevator Check plans control surface deflec tions Balance model shown plans sensitive controls move center gravity CG rearward less sensitive move CG forward May flying days windy Weight/Poffenbarger Continued page 93 heavy retrospect non-metallic Mono Kote variety also should have tested According experiment square inch 60-size 2100 sq sur photo Stuecker taken Geophysical article appeared May1985 issue Model Aviation noticed reader wrote MA requesting information wind flier served asthe structural format forthe Geophysical simpleand innocentbeglnningscamethe end product theform article HOYHXDEAWAYIIOBBYHTDEAWAYHOB9YHIAWAYHOBBYHIDAWAY FAMOUS BRITISH DIESELS AEROMODELLER PLANS SPARES M/E PAw D/C 3rd PRINTING CATALOG - DIESEL HANDBOOK $350 pp HOBBY HIDE WAY DELAVANIL 309 244-7389 61734 Ho00YHrOEAwAHO0BYHIDEAWAflIO0BY9IDEAWAYHOB0Y4IDEAW 3 December 1985 175 FIBERGLASS COWLS 70 cowls eelpants Sig Pica Top-Flite Jemco Nosen Pilot Staflord Radials Behrens Garmhausen W E Tech other kits plans One-piece laminated construction handlaid fiberglass strong hut lightweight Send SASE price list please inclpde names models interested parts call between DAM 0 PM EDT information COD ordering hope hear youl 703 890-6017 Dept MA St 1 Sex 530 Geedview VA 24095 PAC MODEL SUPPLY WrCAiV4 203 575-0916 Flight-Proven DesignsTemp 203 393-1990 Balsa Construction 5-6 lbs Cessna 15040 Powered 62Easy Construction 110-15 hrs Stable Fliers Mooney 40 Powered 62Scale Like Appearance Slow Flying Capabilities Cherokee 40 Powered 604955 ea plus $250 UPS Cherokee 1/3 ScaleContest Proveni 23 place Ken Barnes200 plus 800 shipping Cessna 15025 Powered 50 3S plus $250 UPS NEW Firemaster BIpe5667 lbs60 Powered 6995 llntroductory Pricel Coming Soon 60 Powered Pattern Ships MasterCard ers Invited Meier Sr Owner/Pres lie Perugini Assist TARBaby TRANSMITTER CASE /Especially Turn-around thisAn inexpensive rugged molded .L 850 sq 120 4 cyclecase protect expensive iW powered Ron Ohidgey designtransmitter both two stick smooth solid performersingle stick transmitters Brown Rib templates computerleather grain aluminum trim plotted Plans construc lion hints locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing br plug-in wings Included pair ol special slip-fit phenolic sockets build wing structure Now size models 78 dia x 2 $ 895 1 dies 2$ 995 1 dia x3- $1495 Gator RIO Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 aster SION OF BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 13141 221-8803 MANUFACTURERS OF SPORT PATTERN STINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 RBIPE NEW WING MOUNTING SET wing mounting system developed Ron Chidgey last neal accurate stays tight Three nylon brackets screws machined wing blocks included -$695 See Dealer Order Direct Include $150 Per Item UPS Information latest engines prices CALL OR WRITE FOR FREE CATALOG VISA MaslerCard Accepted F 0 X MFG CO 5305 TOWSON AVE FORT SMITH AR 72901 501 646-1656 face plane covered aluminum MonoKote total add-on weight would 55 oz Super Coverite lighter expected though addition Balsarite prepration balsa brings very close aluminum MonoKote overal weight build-up Su per Coverite joy work compared other methods finishing recommendead primer Primex very light respect silk dope can seen lightness silk overcome heaviness filler balsa preparation clear dope used both appliction priming steps Fibergiassing performed poly ester resin thinned MEK methyl ethyl ketone applied soft brush Excess resin blotted tissue paper little no sanding needed approach Comparison 06 oz/sq yd 1 5-oz cloth shows medium-weight cloth absorbs considerably resin primer giving rise 25oz additional build-up over 06-oz cloth surprising discovery though fibergiassing did result greatly-increased weight build-up com pared other methods certainly due method resin applica tion very satisfactory highly recommended resin poured blotted thinned heavy resin resi due will accumulate sanding will difficult Recently application glass cloth cyanoacrylate CyA glues has recommended much lighter method Using CyA 1 5-oz cloth did result much weight saving however apparent gray primer could sanded off better because cloth weave less visible blot ted-resin technique CyA method re quires excellent ventilation lot skill avoid bumps thready problems however keep mind experi ment weight build-up critical comparison ease application finish ing techniques Perhaps striking result ex periment weight build-up finding YS ENGINES HATORI HEADERS TETTRA HARDWARE ATLANTA- OMEGA SEE YOUR LOCAL DEALER SEND $1 FOR CATALOG $6 FOR HEADER POSTER GOLDEN GATE HOBBIES POBox 123 San Bruno CA 94066 TEL 415 952-3045 1 76 Model Aviation GZP C 904 478-6745 Al Featuring fast service qualified people latest equipment including SPECTRUM ANAL YZER AM FM SIGNAL GENERATOR Call Sam Leonard Tony Stiliman custom work competition needs stock complete hobby line specializing competition accessories discounted prices RADIO SOUTH-m AUTHORIZED SERVICE CENTER FOR kruft Pro Line U G 43 West Nine Mile Rd Pensacola FL 32514 ~~2 * A Futaba Distributor er Inquiries Welcome * great weight penalty pay fiberglassing particularly proper technique followed method thinning catalyzed resin MEK blotting excess resin before has cured has covered previous issues Model Aviation necessary apply heavy resin coat balsasheeted surfaces penalty paid added weight far exceeds minimal benefit added strength Furthermore O6-oz glass cloth quite sufficient surfacing planes Comparing fiberglassing technique Super Coverite example would predict finish fibergiassed plane would weigh 227% carry comparison step further suppose built 1/5-scale DeHavilland Beaver used Balsarite Super Coy erite Primex finishing tech niqueand found finish failed achieve aluminum-sheeted appearance desired planning strategy second model plane could estimate 227% increase weight finishing materials lightweight glass cloth approach se lected might easily accommodated Schlueter Free Flight Models 3508 Poinsettia Ave Manhattan Beach Ca 90266 0 C PACIFIC ACE 0 BLACK BULLET RTIAL KITS plans&printedwvod PACIFiC ACE BLACK BULLET 20332530$470 40$665 ADD $200 SHIPPING FOR EACH 1t03 KIT ORDERCA RES ADO RI TAX Dealer Inquiries Invited WELLI TOLP YOU NOT TO STAND IN FRONT O THT ENGJ-N NEW IMPROVED dUm Wiliat Medd macre wouli POW *US PatRol No Des ** WANDIT * ealers Ivxded, * -- 6 * -I *10 ft CORD * *WetorDry * Stick Abrasives * *A Keen Machine gives exceptional *sanding control 101 excellent finish *5995Basic vcI 1 fIat Wand 1 each0 *xlRgvts *o595Bxida Special rid 2 lIar 1 naIlrxand sand 5 vi K grits9 * *129Dalaxe eExdes 3 hat 2 haIl rxand wandS 1 baIt wands 10 xl9 *K grits9 *Additional Wands Abrasives availabie *C * WANDIT MANUFACTURING 214 288-5789 * *PO Box 266 uite Texas 751499 December 1985 177 Futaba JR GLOW PLUG TAP 14-32 E8 4WtR HARRY HIGLEY 8 SONS INC P o Box 532 GLENWOOD ILL 60425 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX K AMA Membership143 Academy Av Research Dev12 Ace Radio Control Airtronics2 Altech MarketingCover 3 Astro Flight86 ISA9 n Built Models132 W~t flistributors144 165 Productions178 Enterprises146 24 yandTools178 154 Products16 Model Imports10 Model & Hobby Expo133 aroIlna Taffinder170 Cheveron164 Model Supply168 LrIc178 Condor Trading Co161 Consumers Guide26 Coverite29 151 Cox Hobbies147 iation150 ngineering174 Designs146 Systems24 jtm uenard Model Products172 Larry Dodge Aero Inc178 Dougs Hobby Shop94-97 Du-Bro Products Inc149 FAI Model Supply150 y Inc4 ass Master175 Models152 ost Products152 MfgCo176 27 IEC fl.Products162 i rroducts160 aur MI. rroducts176 Geometron Co171 Carl Goldherg Models5 153 Hobbies176 Products98175 Great Planes88 Harry B Hlgley& Sons166177 Historic Aviation25 Hobby Barn134-135 Hobby Horn170 Hobby Hideaway175 Hobby Lobby155 Hobby World Imports152 Holleys Silent Flight30 Ikon Northwest Co162 Indy RC Sales Inc138-1 40 International Modeler Show53 Jeff Ia Corp174 Jomar51 JTec136 K&BMfg172 K&S Engineering160 KandWEnt160 Kin Craft166 Knights Air133166 Kustom Kraftsmanship8 L&L Model Products18 Leading Edge157 Lindsey Micro Products166 Lone Star Models45 M&W Models162 MACS Products160 Master Kit176 McDaniel RC Service144 Messers Quality Model152 Micro Mark6-7 Micro Model Engineering150 Midwest Products175 Model Engineering Norwalk10 Model Ignition12 Model Magic Products47 Model Products Corp148 Model Rectifier CorpCover 2 Morrill-ADC168 Mutchlers Hobbies158-159 NEPRO174 Nor-Ray Products Inc55 North Products178 Off Ground Models163 Ohio Superstar156 PAC Model Supply176 PK Products129 Pacer Technology17 Peck-Polymers172 Penn Valley Hobby Center156 Peripheral Systems Inc28 Pica Productsis Polks Hobby31130-131 RC Buyers Guide 18 RC Video Magazine 150 RJL Industries 142 RJM Systems 162 Radio South 177 Repla-tech Intl 178 Robbe Modelsport 179 RoushMfg 170 SR Batteries176 SachsbyTG173 St Croix Park Falls28 Satellite City145 SavOn Hobbies49 Schlueter Free Flight Models177 Shamrock Competition Imports165 Sheldons Hobby Shop30 Sig Mfg16 Simcoe RC Aircraft Co13 Slim Line Mufflers148 Southeastern Air Crafters162 Standale Aircraft132 Sullivan Products1169 RC Sweitzer Enterprises129 T&D Fiberglass Spec 144 Tatone Prod Co 86 Tidewater Hobby Enterprises 55 Toledo RC Exposition 142 Top Flight Models Inc 87 Tower Hobbies 167 US Alpina85 VK Model Aircraft142 WE Technical Services 8 Wandit Manufacturing 177 Williams Bros 86 Wilshire Model Center 26 Windsor Propeller 144 Wing Mfg 16 Workshop Concepts World Engines Zenith Aviation RTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS plane such Beaver fact lighterweightweight regardless material meth building techniques constructing sec- Another obvious conclusion drawnod Sure Micafllm pre-primed ond model could compensate forfrom experiment finishingcase lighter fibergiassing 15the small increase finishing materialtechniques add comparable amounts ofContinued page 180 ATHES ING MACHINES INE SHOP SUPPLIES S Fe Avetlon Modeler BLUE~DGE MACHINERY AND_TOOLS INC I0 Call oII f,e i-ASO-072-ASeeRHPrHSHHUHAI WOE ef Ic WV 562353AMHH7 MHHH8HCUHrHrE POAoeS36-YHeoioaeeWV25526 legE $100 boHr 200 Pugeel SILICONE TUBING O2550 SMALL 1 062 dl 1 83 00 MED1002 dl 0400$9000600 LANGE 1 125 dl 0000 81125 *2000 US CAN POSTPAID DODGE AERO INC 10210 MannIng Ave N Stiliwater MN 55082 178 Model Aviation flIII Ill ow, 11V1119 110111 2hour spectacular helicopter exploration Breathtaking music Critically acclaimed Details FREE VHS BETA Beerger Productions 32I7lt7AeUh La. 07102 /02 O10224I * SCALE DOCUMENTATION * SCALE DRAWINQSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1985 INTERNATIONAL AIRPLANE CATALOG48500 MCKENZIE HWY S3OOVIDA OREGON 97488 PAW DIESELS Englands Finest 049 35 RIC STD Send S 100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 NEWSPACESA FUEL CONTAINER FISHENYHUrBUS o 73/8 highE 91/8 THNgh Rigid PHIyHIh$IHHH INCIHEIHE THIIIH9 pI 8120 pEg FOHUNHArE Leck THMNg Through Cup North Products PO Box 18415 cleveland Heights OH 44118 ULinL 93Super Drone$1275 RC Shoulder-wing sport flier spans 68 uses 45-60 engine No 494HABOOB$400 CL Very lightweight sport/stunter flies wind power alone can adapted 049- 1 5 Cu glow engines Spans 39 No 495FW-1 90$425 RC Hand-launched all-balsa scalelike sport flier 1 0-1 5 engine spans 331/4 Part Dogfight Duo Two RC channels No 496P47 Thunderbolt$425 RO Characteristics like FW-1 90 Part Dogfight Duo Spans 33% No 153Slilietto CL Stunt model McDonald winner 19761 9801 982 FAI World Champ $ 375 No 239Blue Birils AC Ken Willards formation plane 4-channel 18 power 375 No 262Crashmasler CL Crash-proot trainer two nizes1 5-30- 35-40-power$125 No 299Gee Bee Sr Sparisler AC 1-scale Haftke tsr 91 power Prototype span 3011 Two halt sheets Ne 302Mint P16 RC Sarpnlus 049 docted tan sport tiler tsr 2-channel Balsa wings tail fuse structure$275 No 3101930 Fleet Biplane AC Sport Scale tsr 35-48 4-channel Wingspan 56 % scale Two sheets -$625 No 314Drake B AC Ken Willards flying boat 3-channel 15-power Ply tram land remnoable gear -$375 No 326Taylor Cab AC Dnn Sinus Schoolyard-Scale 049s 2-3 channel Spans 50 -$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope soaring -$200 No 356Pieces FF Indoor Easy B Aubber-power contest-winner hy W Van Gorder . $100 No 386Laser 200 AC Sport Scale replica ot championship Aerobatic Ilier Uses 40 power 4-5 channel Two sheets -61075 No 398Gee Bee ll1 RC Hatikes latest 1-scale spans 75 weighs 15 lh tiles 90 larger Pour sheets no doc- 62225 No 414Elecliic Spaiky AC electric powered tan flier tsr 05 motor 3-channel AC scaled api 939 rubber-power fuonrite9850 No 422Scooter AC Two-Meter Sailplane has won Nuts event 1982 1983 plus other contests$550 No 426Chioa CApper ACFahuloos 74-in span Sport Scale flying bout tor four 10 size engines aod 4-channel Three sheetsno doc $2000 No 430Imoside AC Zippy little sporister 1 0-1 5 power 3-channel AC -$400 Na 433Waits Up AC Electric-powered glider tor 2-3 channelo 035 motor spanO 52 No 437Kioiisher CL Profile Carrier plane spans 40% uses 35 engine - - -$600 INe 438Croloer PF Embryo Endurance rubber-power tan ship has big-model characteristics -$200 Ne 440Cavaler AC Old-Timer like new design has hoge wing br slow easy flights Far 35 power 3 channels Two sheets- -61725 No 441Nil Wil PP Hot small lightweight competition ship 15 power designer Horn] Murphy-- 475 No 442Lazy Duck AC Big canard sport flier tsr %A-09 power 2 channels Uses toam board parts - -6650 No 444Firehoit AC pusher canard sporllpattern uses 40 pusher engine 4-channel Has swept forward foam wings - 650 N 0446Le Crale AC Electric-powered sport tlier fur 05 motors 3-channels Two nersions parasol cabin6550 No 447hA Miss America AC Old-Timer %A Texaco model tsr 049 glow 2-channels$650 No 452Gee Bee Z AC Ouarter-scale spans 71% uses 90 power Pour sheets - -$1600 No 453Smoothie Prntile CL Profile rendition Bob Palmers soper-Stunter early Pifties 35 power$550 Ne 454Sweel P-3D PF Neat stick and-tissue Outdoor Aubber P30-class model isa cootnot-winner -$200 No 456HiTech 2001 AC Oucted-fan futuristic-looking canard 25-size engines Built-up construction Three sheets- -91175 No 457Spectra AC hlectric-power 05 size motor uses 3 different wings spurt soaring aerobatics-6700 Na 458Dauntleun CL Profile Carrier 15-power events Two sheets -6575 No 4604-40 AC Shoulder-wing sport flier 4-cycle 40-size eogine 4 channels6650 Na 461Tinter Barnstormer CL Famous unflapped Stunter late Porties Uses 35 engine -6650 Ne 462Pemilia P0 FF Jumbo guSher Scale WW Italian observation plane -$400 No 463Platykelmiothes VE AC %A Pylon racer uses life ply built-up structure fur strength lightness- - $ 475 Ne 465Blue Max AC Pan-fly sporluter 40-size engines spans 52 Lightweight structure - -$700 Ne 466Competitor CL Stuntertor 60 power has 650 sq wing area - -$575 Na 467Alco Sport FP Aubber Scale design woo 83 Nato f designer Don SrulI Wingspan 26 in-9250 Nn 468Smoother CL Stunter 29135 power Design based oo hybrid SinoothielNobler$675 No 469Don Kichot AC Sport Scale rendering Polish homebuilt pusher Spans 75 uses 40-size 4-cycle engine Foursheets $2075 No 470Stinker 9C Mid-wing sportoter uses 40145 four-stroke engine spans 50% tail-dragger -6650 No 473Tocane AC Sport scale turboprop trainer spans 66 uses 60175 engines Two sheets. No 474Pacer 15 FF Nordic A-i Towline Glider won 1983 World Champs - -$500 No 475Geophysical CL Slow Combat model uses geodetic wiog construction 36 engine Two-sheet plan has partspatterns - 0 No 476ManIa 250 PP competition Ak plane has manta-ray-shaped wing spans 43 - 00 No 477Maodailo CL Sport Stunter uses sport 15 engine spans 35 in- 25 No 478Buttercup AC Cute elfin sportoter uses micro 2-ch AC pulse-rudder Spans 27 020 035 power- -$300 No 479Four-Stroke Booster ftC SportlAerobatics uhip has 1 920s styling uses 90 4-stroke engine spans 8S 2 sheets$1100 No 480Bidiculoss CL Pabuloas competition Stunter has 550 sq wing area flies TO 0491051 spans 47% in$600 No 481Europa 9C Sailplane PAl competition has fiberglass fuselage faam wings wing flaps stabilator tail Spans 110 in$700 No 482GeldesA8er AC SportlAerobatic model looks like Golden Age sportster 60 engines spans 62 -6750 Ne 483COS Nawk Ultralight PP Outdoor Gas Scale plane ones CO-2 power spans 29 - 00 Ne 484Aerneca K AC Osarter-Scale 30s Iightplane spans 9 ft. uses 12 ca 2-cyl 4-stroke engine weighs 11 y lbThree sheets$1975 No 485Hawker Hooter CL Fun-scale British et fighter has 16%-in foam wing uses %A power- 75 No 486Miles-Atwood Special AC Sport-Scale Golden Age air racer uses 21 engine spans 45 in-- $825 No 487Cap 21 AC Scale Aerobatic plane 40-size engine spans 62 Two sheets- -$1000 Na 488MB-i PP Jumbo Aubber Scale 1920-era Thomas Morse Scout biplane spans 37 00 Ne 489Undertaker CL Poam-wisged Past Combat plane 36 engine spans either 45 47 in- - 00 No 490Weekender AC Low-wing sport flier 20-size 4-stroke engine spans 47% -6575 No 491yellow Peril CL Advanced trainer all-balsa spans 23 uses %A power6325 No 491 Circulator PP A-i Towline Glider spans silo uses fiberglass tail boom circle-tow mechanism - 6 250 Circle numbers plans wish order 193239262299302 326332358386398 426430433437438 442444446447452 456457458460461 465466467468469 474475476477478 481482483484485 488489490491492 310 414 440 453 462 470 479 486 493 314 422 441 454 463 473 480 487 494 495496 Plan price leciedos firSi class poslage US delivery Which Air Mail over 300 miles orders oulside Ihe US lease add $250 Air Mail $125 surface mail Make check money order payable US funds Model Aviation c/u AMA 1910 Samuel Morse tIn Reoton VA 22090 Please allow 3 6 weeks delivery Please print carefullyEnclosed $ NAME STREET CITY STATE ZIP oz glass cloth keep mind data expressing small percentage total weight aircraft hypothetical 60-size plane weighed 8 lb 128 oz finishing materials add-on weight would vary 35% Micaflim 75% 15-oz glass cloth total usually tolerable range model aircraft An important consideration based upon results application data next project course finish ing techniques will differ condi tions experiment probably sufficiently alter outcome signifi cantly applying data will need estimate total surface area aircraft covered apply estimate follows X Weight oz increase estimate W Observed weight oz experiment Estimated surface area plane WA 2100 Dont forget add both top bottom wing surface areas plus tail surfaces guess fuselage area calculation may help select method over another clear however weight alone important influencing factor selecting finishing method As stated before personal prference de sire special effect skill tools hand hope durability weather conditions under work influences experiment simply removes possible preconceptions about weight build-up aspect decision-making process Weight paint included experiment simply because would add too complexities design experiment wide variety paints available us should subject future experiment Basical ly however white paints heavy clear lightest Pigment adds weight paint can add ounces unsuspected manner will inter esting technically challenging criti cally compare two-part epoxies poly isothiocyanates lacquers enamels onepart epoxies poly-S Voisin/SruII Continued page 89 testing Add clay get center gravity CG point shown plans Adjust model turn wide circles against torque left left handed prop means forward rudder ailerons As canards little model can handle much power wish use larger motors can achieve exhilarating high-climbing flights would have taken Gabriels breath away 180 Model Aviation 0 0 csJ n 0 -00 O3 00 zoo m 050 0 s oo us 0 -to GO 90 flb 000 0 00 00 0000 oa 000 80 Old C 00 us 0 0000 00 0 000 Ci 0 00 00~ Os 0 J 0 E00 U Os 000 N coo Is