a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation
Edition: Model Aviation - 1976/12
Page Numbers: 19, 20, 21, 22, 89, 90, 91, 92
a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation
Edition: Model Aviation - 1976/12
Page Numbers: 19, 20, 21, 22, 89, 90, 91, 92
a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation
Edition: Model Aviation - 1976/12
Page Numbers: 19, 20, 21, 22, 89, 90, 91, 92
a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation
Edition: Model Aviation - 1976/12
Page Numbers: 19, 20, 21, 22, 89, 90, 91, 92
a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation
Edition: Model Aviation - 1976/12
Page Numbers: 19, 20, 21, 22, 89, 90, 91, 92
a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation
Edition: Model Aviation - 1976/12
Page Numbers: 19, 20, 21, 22, 89, 90, 91, 92
a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation
Edition: Model Aviation - 1976/12
Page Numbers: 19, 20, 21, 22, 89, 90, 91, 92
a new way make Super Fibergiuss FuseiGges Revolutionary technique eliminates wood plug female mold foam dissolved shell completed ALL OF YOU scratch-balsa-wood-build ing guys can now build super fiberglass fuselage cheaper easier balsa wood construction polyester fiberglass now can build epoxy glass fuselage wooden plug female mold revolutionary technique involves use fast easily made styro foam plug covered epoxy coated fiberglass cloth foam dissolved super fiberglass fuselage integral bulkheads left techniques eliminate problems associated scratch-built fiberglass fuselages styrofoam standard foam used foam wing construction No special tools required hot-wire cutter similar photo 1 band saw de sirable dont have hot-wire cutter band saw could use coping saw substitute some extra sanding epoxy resin used made Pettit Corp Use Hobbypoxy Formula II major resin/glueing operations Hobbypoxy Formula II available use Pettit Polypoxy Formula 7035/7040 plan build several fuselages 8-hour cure time acceptable use Polypoxy 7080/7085 three basic types fuselages require three different techniques box style [Ugly Stick Sweet Stick etc] b semi-round fuse lage Kaos Dirty Birdi Tiger Tail etc c compound curve difficult shapes P-Si Aeromaster F-4 Phantom B25 article will deal semiround fuselage used pattern fliers photos show basic steps redesigned 40 Bobcat Make sure first fiberglass fuselage falls within parameters semi-round fuselage general shape shown photographs Dan Mauch Photos Boyd Beicher Construction Start installing propeller correct size spinner engine plan use Set appropriate size Kraft-Hayes engine mount Place sembly against plan adjust en gine mount until distance back spinner back mount equals distance plan back spinner front firewall Mark motor locate position set aside drill mount bearer holes time Using piece y plywood place piece carbon paper over ply wood Lay sectional view firewall over arrangement trace out December 1976 19 Tools materials foam cutter battery charger precision square flair pen epoxy brush mixing stick alcohol cleaning dish Glue Hobby poxy Formula II Pettit Polypoxy 7035/7040 Pettit Polypoxy 7080/ 7085 Foam cutters have usesMake get Left Top foam block sanded fuselage top nose centerlines thrust line fire wall layout lines established Above foam nose block cut off nose ring glued place Below Front firewall aligned glued back nose block Super Fiberglass Fuselages Right back nose block glued main fuselage foam block Below top bottom Side-view template aligned pinned place Top-view templates aligned pinned place Top view cut both sides wing front piece cut off Fiberglass over lap lines now established Stabilizer cut-out marked both sides fuselage sanded shape full outside view section firewall Trace vertical horizontal thrust lines lay out holes fuel lines throttle linkage steering linkage Center motor mount front firewalls thrust lines mark holes Now drill holes motor mount fuel lines throttle linkage steering linkage Sand outside edges until have duplicated taper shown plans place aside Using piece 1/16 plywood make nose ring identical shown plans except cut out center hole sure sand taper onto periphery nose ring shown plans Place completed nose ring firewall against plan assure parts accurate Lay large piece poster board drafting table Lay long sheets graphite paper carbon paper over poster board lay plans over arrangement poster board long enough trace entire side top view therefore will necessary make templates sections Make tem plate outside lines side view nose ring back end wing saddle move plans over unused part poster board com plete side view template wing saddle tail sure draw stabilizer cut-out Repeat procedure top view make sure trace centerlines nose tail onto templates lines transferred poster board carefully cut out shapes cut out stabilizer lines time Check templates against plans set templates aside sheet 4-in foam cut out block same length templates Make blocks wider deeper templates cannot obtain 4-in thick foam can laminate two pieces 2-in foam form 4-in-wide block Regardless whether use 2- 4-in foam must make sure top straight top cut 90 degrees sides front cut 90 degrees sides top unless thrust offset re quired top sides can sanded straight contact cementing piece 69-grit open-coat sandpaper flat board Plane block foam over sandpaper until block foam straight along top 90 degrees sides Use straightedge lay out center line front back along top block use accurate square project vertical centerline down front Lay Out mark horizontal centerline nose ring shown photos Measure back back nose ring front firewall plans Transfer measurement front nose back along centerline top mark point Square off side 20 Model Aviation point lay out draw line across top side side Using square project line top down side Pin /s X ce strips against side lines just drawn cut off nose block using hot-wire cutter bow-type saw off using band saw Make sure cut straight Project top centerline down back just cut off nose block Lay out draw horizontal thrust line onto back nose block Using Hobbypoxy Formula 4 glue back nose ring front foam block lining up centerlines nose ring Use glue sparingly keep glue outer edges cures glue thefmnt ply firewall back nose block shown photo graphs cured glue back firewall large foam block using straightedges keep assembly aligned cures Foam Cutting Lay foam block its right side Lay left side front template against foam Line up center nose ring center templates nose Check midsection top top foam block satisfied use plenty pins secure template block Install rear section template same manner making sure tail section template top butts forward section shown photographs Double check squaring off right side foam block top nose ring check top nose template Repeat maneuver firewall satis fied alignment can now cut side view Before begin would suggest cut nose section outside template sand down nose sure dont undercut template nose ring firewall Begin cutting foam top nose section moving block foam wards cutter Stay outside tem plate until youve gained experience Cut bottom nose section nose back front wing saddle Pull out turn block around cut bottom tail up wing saddle very careful cutting wing saddle Remember push foam too fast through cutter press template too hard against cutting wire fuselage side view should now look like the photograph Install top view templates same manner did side view cut out left right sides foam block Again stay outside template nose area unless have mastered hot-wire cutting procedure Sand top side views smooth within 1/16 nose ring firewall Cut off wing fairing block Left Stabilizer aligned slid position However glued time December 1976 21 Top Canopy wing fillets cut Out shaped Middle Bottom tail glass cloth trimmed glued place Above Canopy glued place Top layer glass laid up cured stab cut out made Below Wing aligned spot glued fuselage Wing fillets added Picture shows fillets prior being glued Super Fiberglass Fuselages Stabilizer removed fillets glued wing popped loose sides fillets now fiberglassed Right Foam dissolved wing saddle nose Procedure text Cut-outs engine made Fin stab added First coat epoxy has applied Below Fuselage prime painted nose-wheel gear hold drilled servo rails installed wing hold-down blocks added Note long music wire drill pushrod holes Bottom Fuselage sand ed painted white ready color Coats Weight point 17 os leading edge wing saddle See photos details Draw lines center wing saddle leading edge forward point above bottom nose ring both sides foam core Draw line top back wing saddle point /2 above bottom tail both sides foam plug lines fiberglass overlap reference line Take side view template cut out area stabilizer Pin template side core lay out sta bilizer cutout Make sure lines dark show through fiberglass will described later Sanding sanding accomplished 60-100 grit aluminum oxide open-coat sand paper Use sanding block keep areas straight sand direction Now study sectional views foam core Begin sanding wide bevel left corner nose ring back firewall Sand about ten passes left side 10 passes right side important keep plug symmetrical during sanding have sanded nose section within 1/16 nose ring start sanding radius left right sectional views Start taking longer strokes sand back end top wing section Keep moving left right sides keeping everything As near very end tail very careful over-sand Continue sanding curve top sides until have dupli cated sectional views same man ner sand bottom nose section bot tom tail section Re-establish fiberglass overlap refer ence lines top centerline Now check entire shape assure within shape shown plans Fill deep dents gouges pits Dap spackling compound Fill low spots around nose ring firewall same manner keep compound off wooden parts Sand smooth hard Cut out top side view templates wing fillets canopy fiberglass canopy can omitted omit wing fillets becsause give structure substantial rigidity clear pastic canopy can installed after fiberglassing has completed built-in glass canopy popular today also lends additional strength fuse lage Cut out foam canopy wing fillets using templates guide Sand canopy shape fit bot tom canopy fuselage Once canopy has fitted glue fuselage using Hobbypoxy Formula 4 Rough sand wing fillets shape continued page 89 22 Model Aviation Above Bottoms fillets now glassed trimmedfuselage ready covering Super Fuselages/Mauch continued page 22 shown plans Use l wrapped sandpaper make ra dius leading edge fillets use larger shapes bring radius way end fillets Use light pressure sanding keep fin gers behind area being sanded keep foam breaking Final sanding fillets takes place after basic fuse lage has fiberglassed Set wing fillets aside now well begin fiber glassing Fihergiassing Fiberglassing probably diffi cult important task involved procedure following paragraph cov ers certain facets have tried should observed performing fiberglassing operation 1 Do attempt cover entire fuselage piece glass will develop several wrinkles may get top sides looking good youll have large air pockets wrinkles bottom due gravity 2 Do apply excessive heat speed curing have found 90 95 de grees F good curing temperature 3 Be careful deform warp tail fuselage laying glass cloth working out air pockets Check condition after have finished laying up glass cloth fore epoxy sets slight readjustment glass cloth will correct condi tion however can prevented hav ing adequate support nose midsec tion tail Now lets start glassing Dust off loose foam particles set fuselage support stand sizisilar the photographs Cut out piece lO-oz tight-weave fiberglass cloth cover entire bottom tail section wing saddle tail Trim glass cloth sharp pair scissors X-acto knife Trim cloth cloth layed bottom- fuse lage will extend down fiberglass overlap reference line should able see line through glass cloth Now mark trim line glass cloth both sides bottom tail section Cut piece lines drawn making sure get clean cut dont warp line pulling weave angle fiber orientation Using above instructions cut other piece l0-oz glass cloth bottom nose section Now remove loose fibers lay pieces cloth respective locations Work glass until confrorms smoothing out carefully Now lift pieces off gently retain shape Mix two table spoons Hobbypoxy Formula Ito tablespoon hardener Using stiff epoxy r SNAP-ON BALL LINKS 2-56 THREADED COUPLER INCL fl THREADED FOR 4-40 ROD OR BOLT p TOUGH NYLON LINK SNAPS-ON AND HOLDS TIGHT iiLL2 THREADED LINK 5-Piece ball link set No181 excellent off-set steering throttle servo hookups Includes steel ball assembly 2-56 thread washer nut threaded coupler nylon ball link Easily adjustable Only 85C S AIRCRAFT QUALITY HIGH STRENGTH STEEL 118 TRIM ADJUSTMENT lIZiJJllhIuIll RIVET LINK 4-Piece ball link set No 182 prefer permanent installation Includes nylon link threaded coupler steel ball pin washer peening Absolutely no linkage play ball links used Nylon link helps reduce viabration looks good tool Only 85t r AILERON HORN WIRE _BALL LINKS 1HREADED assmy Excellent hook upBALL LINK strip ailerons _______ differential throw J No1892 Sets $175\Thisnew4piece BALL LINKI~threaded ball link set fits perfectly servo SOCKETSf71 Iarm holes belcranks Extra nylonLX1 / Unylon horns throt styles Du-bro ball linkseasy hook up sockets FitstIe arms Strong No 1884 $1 00No 190Just bolt 85 0gIX G -DU-BRO PRODUCTS INCORPORATED 0460 Banner Road Wauconda IllInois 60084 USA BOLT-ON LINK 3-piece ball link set No 180 must helicopters readily adaptable rudder elevator servo linkage RIC planes boats cars Ball joint action eliminates binding neat clean appearance OnlV 85 December1976 89 NO - PLAY PRECISION MAKE THROTTLE HOOK-UPS / EASY 4TAKES CARE OF ANY MISALIGNMENT Super Fuselages continued brush brush thin layer resin tail surface bottom Work quickly neatly Extend glue down overlap reference line Now lay glass cloth over tail section work out wrinkles make sure cloth lines up reference lines brush additional epoxy resin glass ex cept reference line After satisfied cloth has glued down foam smooth has warped tail section let set purpose 15-mm epoxy glue piece its proper posi tion Hobbypoxy Formula II Pettit 7035/7040 epoxy glue can used preferred method would have wait four hours after application before can continue next step sake expedience 15-mm glue used fasten bottom nose section bottom tail section glass cloth place glue curing tail sec tion glue place piece glass cloth cut bottom nose section using Hobbypoxy Formula glue has set bottom nose section trim excess glue runs loose fibers extend below reference line cut away excess over nose ring try fold glass cloth over nose ring will probably develop air pocket Also trim excess cloth wing saddle Check bottom tail section trim off excess glue cloth Now sand epoxy glue fiber glass overlap reference line both sides front back Sand glue sand cloth Additionally want sand no further e reference line fuselage upside down shown photograph building 40-powered fuselage cut piece l0-oz glass cloth cover en tire top nose tail down th sides least inch beyond ref erence line cannot pick up ref ence line through glass cloth remove top layer cloth re-mark reference line flair tip pen building 60-size fuselage cut piece 7-oz glass cloth cover entire top sides Cut half piece 7-oz glass cloth cover nose back 2 inches beyond wing saddle either 40- 60-size lay full piece glass cloth over fuselage smooth out Work cloth nose tail nose down sides towards tail sole purpose step ascertain wrinkles tend appear fuselage will have fiberglass canopy should almost no tending have wrinkle other hand built-in can opy will probably tend have wrinkle show up top near nose wing saddle area Depending par ticular canopy design will probably able eliminate the nose section working cloth mid dle canopy along top down towards front should no problem wrinkles mid section since will covered wing fillets persistent nose area work area engine cut-out will made eliminated cut out dry run described same technique used epoxy will valuable experience working cloth observing tendencies form folds wrinkles wrinkles will slit overlapped point fold occurs Remove glass cloth fuselage set aside Remove loose glass fibers styrofoam plug Now experts can pro ceed actual glassing operation Mix three tablespoons Hobbypoxy II glue three tablespoons hardener Mix thoroughly keeping mind tempera ture factors woking life ma terial Give yourself time available step 35 minutes Brush coat resin over entire top sides fuselage Extend layer resin least w fiberglass overlap reference lines coat resin should liberal coat should heavy coat Check make sure foam plug adequately supported nose mid section tail Next lay glass cloth over entire fuselage top sides up cloth between sides nose tail Work cloth nose up over canopy back over top sides tail Return nose rework cloth top nose up front canopy down sides back towards nose Continue working cloth up over canopy holding cloth front top canopy wooden mixing stick Popsicle stick another mixing stick work cloth over top back canopy Now move mixing stick front canopy lay edge top middle canopy free hand use other mixing stick squeeze cloth down left side canopy same mixing stick now work glass cloth down right side canopy reach junction bot tom canopy fuselage top hold mixing stick junction Re move mixing stick top canopy work cloth down side wing saddle Return left side canopy hold glass cloth junction fuselage canopy work cloth down right side mixing stick Set sticks de natured alcohol continue working cloth tail down side epoxy brush toward tail down side until reach end tail Repeat above procedure assure glass cloth full contact foam epoxy glue has gone through glass cloth excess resin has carried away Set aside let cure 8 hours fuselage cur ing build stabilizer elevator fin rudder can work wing round Out evenings After glue has cured top sides drill small hole plywood nose ring center Press nail nose ring push piece 1/16 d straight base tail nail rod used support fuselage after brush second coat epoxy over entire fuse lage Keep coat light enough doesnt run Let second coat cure over night supported coat cured scrub en tire fuselage stiff bristle scrub brush Bon Ami cleanser Rinse thoroughly blow dry hair dryer Sand glue runs Trim excess cloth below fiberglass reference lines should maintain 3/ overlap Again avoid sanding glass cloth except overlap lines building 60-size airplane lay up half layer 7-oz glass cloth same manner desribed above sure cloth extends nose few inches beyond back wing saddle down sides w reference line Sand cured Lay up another piece glass cloth over bottom nose section overlap sides reference line cured brush coat epoxy resin let cure overnight Now inspect fuselage make sure fiberglass completely filled will probably some areas will have waffle appearance should eli minated spot touch-up epoxy resin Cut slot fuselage stabi lizer Finish stabilizer epoxy resin Sand smooth cured Join eleva tor stabilizer using conventional tech niques elevator stabilizer completed slide stabilizer cut-out check alignment stabilizer aligned glue place Hobbypoxy Formula 4 glue set turn fuselage upside down set wing place Sand wing saddle area until wing proper incidence Spot glue wing foam aileron servo cut out will made Turn wing over light coat Hobbypoxy 4 glue both wing fillets place Make sure full contact wing fuselage glue cured sand wing fillets final 90 Model Aviation Face masks should always worn sandingespecially sand ing fiberglass since fine dust par tides created extreme ly injurious breathe Face masks may obtained auto body repair shops shape Pop wing loose wing saddle Cut two pieces glass cloth wing fillet sides Cut two pieces glass cloth bottoms wing fillets pieces can layed up using 5minute epoxy position After 5-minute glue has set trim excess glass cloth apply coat Hobbypoxy II glass cloth set aside cures Hold fuselage up light sight along surfaces Observe areas show shiny spots low spots corrected will cause sur face wavy correct waviness brush third coat resin over en tire fuselage Let cure overnight sand 100-grit open-coat sand paper remove glaze Switch 240grit wet-or-dry wet sand using iso propyl alcohol should now have satin smooth fuselage ready final wet sand 400-grit wet-or-dry paper Foam Removal step will remove un wanted foam nose section mid section remove foam tail section adds little weight gives additional strength wing fillets completely sealed foam will dis solved fillets Start laying out hole cut nose ring Cut hole through nose ring foam Dremel-moto tool Lay out nose section en gine cut Cut along line hot knife attachment soldering iron try pull piece off will fall off later step Decide want access panel cut bottom fuel tank compartment lay out shape cut hot knife Xgain try pull panel off will fall off next steps Obtain pint gasoline take fuselage outdoors No smoking Stay away possible sparks etc Now point nose down large can 75degree angle horizon bot tom wing saddle facing Pour little gasoline middle wing saddle few seconds foam will start dissolve Pour another ounce gas wing saddle same place no time should pour back wing saddle tilt nose up Pour another ounce fuel wing saddle fuselage vertical tank compartment panel should have fallen off now almost foam should dissolved wing saddle tank compartment nose section should partially dissolved gasoline flowed through holes firewall Remove engine cut-out panel pour little gas nose section Now foam should dissolved remains dissolved foam Rinse out entire inside fuselage two full minutes cold water pour hot water fuselage remove remains foam Remove can reached Shake loose water out dry inside out old cloth Leave outdoors overnight eliminate strong odor Scrape inside fuselage remove hardened pieces foam residue Remove remaining foam back wing saddle Dremel drum sander Finishing Fuselage Temporarily install motor mount firewall Set engine place Install propeller spinner everything line mark holes engine bear ers Remove engine motor mount drill holes Reinstall motor mount Reinforce back firewall piece fiberglass tape using Hobbypoxy Formula 4 Make bulkhead front wing saddle mount wing using dow els block hardwood bolt front wing place Fit piece no bulging recession fuselage Glue place 5-minute epoxy Make two servo tray mounting rails Carefully fit pieces glue place Cut slot top tail vertical fin place according plans Install rudder elevator horns Posi December 1976 91 FULL-SIZE PLANS No 166 Nothing Fancy$8 25 RC biplane 35 engines pretty handles beautifully No 167 Fokker D-23$400 CL profile push-pull fighter35 tractor 15-25 pusher No 168 Simitar$300 RC spectacular flying-wing 1 5 fin-mounted tractor No 101Short Seamew 40-powered Class Carrier model good prototype lends itself toinnovations $300 No 103Kloud King 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF$400 No 104Wiley Post Biplane Petite durable scale design either rubber tail wagger pulserudder $228 No 109Bill Fuoris Quarter Midget House Balsa design modifications faster times$300 No 110The Zipper latest CL Scale Racers John Kilsdonk job isa must racing fans$17 No 111Max-a-Million fleet free flights problem good A/B FAL$375 No 112Sneat Sport RC glider simple job can flown engine$275 No 114ErnieVeolests DH comet CLScale 1974 Natsfirst-placewinnera classictwin$900 No 117Novice simple beginners A-i Nordic constructed entirely sheet balsa$150 No 11 BGollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime$150 No 119Four Beginners Too basic RCtrainer 09 15s rudder elevator motor controls 0 No 120Cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake$550 No 121Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s$300 No 1234-Bits 40-powered RC 500 Club Racer has winning ways Good sport too$400 No 124Semi-Pro Contest-winning HLglider hasapop-up tail dethermalizer$100 No 125HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer$175 No 126HoopteeMk lllJohn KilsdonksCL Rat Racer involves latest state-of-the-art$115 No 127SAC Drone Astro 10 electric-powered 80 scale RC powered Glider$400 No 129Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor 15s$275 No 130Altair Class A-B Free Flight conversion data other classes$400 No 131Gee Bee Model Y 40-powered RC stand-off scale great old-time racers$500 No 134Callisto superb Standard Class RC sailplane also took Nats first$400 No 135Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team$275 No 136Fieseler Storch RC scale model 23-45 5-channel has both slots flaps$400 No 137Ambivalent RC assist FF 29-35 2 chan. can converted sport$400 No 138Candle Wind Half-A free flight competition type offers looks performance$300 No 139Jaguar FAI 15 Combat English champ offers different configuration$225 No 140Nieuport Monoplane Another Hannan cutie C02 indoor/outdoor Brown single twin. $1SO No 141Blackburn Monoplane RC Scale rendition history-maker wheels floats 40engine. $450 No 142Eagle lCL holderof Sr 1/2AProtoand Speed records UsesCos049$175 No 143Sweepo rubber winning Coupe dHivercan also flown Unlimited$275 No 144The Shark RC conversion JETCO Shark coupled flaps elevators 45-60$525 No 145Japanese Myrt CL Carrier Class II model has estremely clean design Rossi 60 No 146QuickSilver RC 1/2A Pylon Racer incorporates latest techniques$200 No 147B-i RC 15 USAF bomber full house Ace foam wings Stable No 148BumbleBee Mk II Foam wing AMA fast-combat saves time cost$450 No 149Comedian RC fun-fly aerobatic biplane good looker 40 60$400 No 150Cardinal SinnerCL stunter 35 engines Detroiter type Very competitive$375 No 151Nesmith Cougar FF rubber scale 30-in span Excellent design long flights$300 No 152The Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 No 153Cerberus RC 60-powered Pattern job retracts advanced features $475 No 154MJ2 Tempete CL scale model famous homebuilt motor control sport 25$350 No 155Tellipsoar RC Standard Class sailplane wins stand-out performance$1000 No 156Free Spirit FF Classes A&B combines excellent power/glide performance$400 No 1571935 Wakefield Winner rubber power top job its day will delight old-timer$275 No 158Flying Flag Fran McElwees 60-powered RC saucer Show Teams sport$675 No159Tercel KeithTrostles 1/2ACLstuntshipfliesanescellentpattern$200 No 160Mariha RC Scale sailplaneand no harder build typical soarers No 161Sunday Sportster RC rudder Uses Ace foam wing Design Ken Willard 049$250 No 162Sno-Bird Standout Nordic A/2 byJim Walters light thermal conditions$400 No 163Tiger Moth Docementation outline drawing scale plan 13span $175 No 164Pogo RC Formula Pylon racerbydeBolt basedonfull-scale Owl$750 No 165MidgetMustang CL 1975-1976 Natswinning Goodyear byJohn Ballard$200 Circle Numbers plans wish order 106109110 101103104 111112114115117118 119120121123124125126127129 130 131134135136137138139141 142143144145146 147148149 150 151152153154155156157158159 160161162163164165166 167168 NAME STREET CITY ZIP STATE Enclosed $ Price includes first-class postage Send check money order payable ModelAviation AMA 81 5 Fifteenth St NW Washington DC 20005 Super Fuselages continued tion servos servo tray set rail Check direction servos proper orientation give correct side servo output arms controls will correct Use piece straight 3/16 x 24 landing gear wire position over bottom fuse lage elevator servo eleva tor horn Mark line pencil Draw another line side fuse lage horn servo estab lish location angle pushrod exit Repeat step rudder servo Cut out servo pushrod exits hot knife remove panels Sharpen end 3/16 inch landing gear wire point Grind flat onto point form router bit Start router exit keeping line lines drawn bottom side fuselage router gets too hard turn hand chuck up end electric drill Hold fuselage securely drill up servo Remove router drill other exit same manner Install Nyrods devises Now try de flect control surface will find Nyrods just stiff wooden pushrods Install wing hold-down blocks glue place Align wing drill hold down bolts Remove servos anything dont want painted Prime entire fuselage Hobbypoxy undercoat Sand almost off dries 400 wet-or-dry sandpaper Now paint fuselage favorite Hobbypoxy colors painting completed install fuel tank engine radio equipment linkage landing gear Check proper operation di rections will glad answer questions addressed care magazine ADVERTISERS INDEX Ace Radio Control Inc81 Andrews Aircraft Model Co88 Cox Hobbies 79 Cumberland Press81 Du-Bro Products Inc89 EAA87 Flyline Models86 Carl Goldberg Models27 Grish Brothers80 Hobbypoxy Products Div Pettit &B Mfg85 Peck-Polymers94 Progress Mfg Company96 RC Buyers Guide91 SC Modeler Hobby Shop83 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc95 Williams Brothers84 World EnginesBack Cover 92 Model Aviation