NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664
Edition: Model Aviation - 1983/04
Page Numbers: 22, 23, 24, 25, 26, 27, 28, 118, 119, 122
NO OCR TEXT NO OCR TEXT TD 09 well-hidden cowl Larger 10 engines would need protrude through cowlbut could also mounted upright sideways Streamlined aluminum tube bungee covers slide over rubberband landing gear shock absorbers similar full-size prototype Lightweight balsa floats covered 3A-oz fiberglass cloth resin weigh 2 oz wheeled gear K&S streamlined alu minum tubing used float spreaders Water rudder float looks realistic unfortunately picks up everything thats surface water Really needed Fuselage width just enough three small servos 225 mAh battery under fuel tank receiver stands up between fuel tank servos Switch mount 1/16 plywood Triangular gussets add strength top fuseiaae around F-4 Simulated wire suports between stab fin 4-lb-test monofilament fishing line crimped 1/16-in aluminum tube connectors Bent pin hooks pass through fin stab Tail wheel gear made brass sheets 3/32-in wheel collar Careful attention detail pays off good wing-to-fuselage fit top window MonoKote wiped clear acetone Aileron servo held place foam tape youre fly water Goldberg 1/16-in aileron puahrods exit through curved slots cut sure seal wood before installing servo Wire link servo arm wing Thin aluminum tabs beverage can glued slots soldered aileron puahrods inside 5/32-in lD brass tubing balsa strut ends Struts screwed ply mounts wing HANI 8UILT FRED REESES J-5 CUBU f DEAD RNGER MAIE O MINE -ALL IT ITI5WHILEk~ NEEDS ISART IIWASIN71JYONITP - 3/16 HOLD DOWN DOWELS BUILD ThiS ANDGOES INTHd yOU GO UP INTNE LY IT OFF LAKE WHILE SIT I4 CUB-WHEN rrs DONE EOGE NEXT BOAT - FLY ALONG SIDE IT YEAR -~JOY WIRE S PUSH PULL AlL 1/8 X 3/4 SPAR JOINER FRct4T 5/32ID BRASS TUBE SOLDEREDTO LINKAGE / / 1/16 FORMERS K 1/8 SHEET "n ALL RUDDER OUTUNE 1/16 X 3/16 RIBS 3/16 SQ POSTS 1/16 X 3/16 LAMINATiONS F 4 1/8 PLY BLKHEAD ROOT BLOCK FAIRING 2 I/B BALSA DOUBLERS Fl TO F3ONLY"N 1/32 PlY DOUBLERI/16SHEET FIREWALITO F 5 F2 VBPLY FIREWALL WITH I/B PLY AT BASEF / NOSE BLOCK II D09 ON TATONE MOUNT 1/4 DOWEL FOR 440 BOLT BALSA BLOCKS BALSA BLOCKS /LOCK BLOC1 3/8K 8 5ON 1A6 STREAMUNEPLYALUMTUBE 2 COWL C I/B PLY BRACE 3 PLACES -x 7 1/4 BALSATOP 1/32 PLY BOTTOM FY10 5 I/850 SPRAY RAILS 1/16 BOTrOMS AND SIDES I/B SQ BOTTOM KEEL I/BX 3/8 FRONT STRUT I/8X 1/4 REAR STRUT K STEERABLE WATER RUDDER NOT RETRACTABLE I/16WIRE STUTS THRU BLOCKS METAL HORN TO WATER RUDDER I/B SHEET FILLERS I/BSO ALL LONGERONSGOLDBERG BELLCRANK T EDGEAILTE SPARS LE STOCK I/BX 3A4FRONT SIR TO C 1/8 PLY STRUT MOUNT Hying schools quickly accepted Cub its easy flying ability reports new pilots soloing after less three hours instruction market boomed Piper sold over 8000 Cubs next three years During war Piper built another6OOO Cubs L-4 military After war another 720 Cubs built before company realized boom over Piper regrouped 1947 little low-priced Vagabond born Cub left behind Only PA-18 Super Cub remained production last Cub line until 1981 tooling remaining parts sold Super Cub now back pro duction company Texas its original form J-3 powered 40-hp Continental engine J3C-40 year later 50 65-hp Continental en gines introduced Cubs certified J3C-50 J3C-65 same time Cub certified Franklin engines 13F-50 13F-65 Thirty Cubs powered threecylinder radial Lenape Papoose engine 50-hp J3P-50 few months later Cub certified Lycoming engines J3L-50 55 65 Cubs also certified de livered Edo 54-1140 60-1320 twin floats picture J3L-65 Cub modeled article shown pages 311 340 Vol 7 US Civil Aircraft Juptner years have wanted build Cub floats sometimes need little push push George Wilsons article Model Builder floats Sig Cub Unfortunately Georges floats scaled down would float model sta bilizer under water redesigned floats using strips Styrof9am until flot ation adequate Cub scale 1 foot spans 44 has 280 sq wing area perfect 09 10 have used Cox TD Medallion 09 engines years like smaller size lighter weight compared newer Tamo now making RC carburetor TD09 used Cox muffler As can see pictures combination makes very neat installation head com pletely cowled Only tip muffler protrudes out side Originally model scale dimen sions outlines however stable enough Consequently tail sur faces have enlarged still scale shape Weight important factor type model feel 33 oz floats about maximum built what consider very lightweight structure RC equipment adds much weight used fourchannel radio 225 mAh battery pack weighed 11 oz Use micro-type radio system could reduce weight 4 oz greatly im prove performance fact using TD 049 two channels would accomplish same floats model should weigh 25 oz would perform well floats add new dimension flying both fun challenging model will convert land plane floats just few minutes needs about 150 feet 26 Model Aviation basic fuselage box stans i/s balsa sides per shaded plans Doublers 1/32 ply inside front 1/a balsa outside give strength needed Fit center wing section wing panels before applyIng top sheetIng Epoxy wing panels center section after blocking up tips proper dihedral Wide crosapleces tuselage Dottom front 1/s ply landing gear mounts holding cowl Formers stringers nose sheeting nose block place fuselage structure compiete wnen 1/16 ply cabin glued leave slots between pieces landing gear wire Nothing unusual about wing construction ailerons buIlt tne same time main wing panels After whole wing panels sanded aiierons cut out I I FThI FLOAT PARTS 1 SS 515 SPAR o p 2 USX I/S LIAESWI q i YMT Rue TIPS PROD I4 SlEET BALSA GB LANNATE 4 LAYERS HE L/RUI/S /605/4 JVSS WGIEIFRGWAROi/B PLYRHON AWSWAR-4RR-SWIWi -sR-S6-3SELLcBANSCA ALuo R~13WWSRIWAWAWARBWA n C0wA wa1 /IBS p FOPRE lAYTON A-SI RWItB I/BO 172 HEAR JODER I/BO I/S 9h WAR I/SU I/A i/B PLY UT MT y RWIASjIIWT____,n-S--a ________________________ ___ ICMYll I7 MTfl A-B SO I/A TRAILER ESGEROEDWAI SCULEI 1/5 EACH TIP 111114 NOBEAGE SHEDRAL 10 r ID FL-AFUR .FLA,FL-FL-BFLWPGP YOU USE RoOHER COSTROS INSTEAD OF AILEROSS EWAN PUSIWIOCWING TIP WAiin I/2 FL-IFL-SP13FL-AFL4FL4 FL-aFL____ F1\ /1/14 BALSA \1/S PLYLMEVIS HEAR FLOATS AND STIWJTSI/B U I/4 I/GSULSUVWBALSA1/IB BALSAVA BALSAI/ BALSAI/B BALSAI/IS WALSA.-ARE HELD SI PLACE WITH AX o FROMI~SA EPOXY RWE STRUTS--AIJUB TUBS CUT AND SUREAMGS SITUEIERAAE CAN GLUED INTO FLOATS WIG SQ FLOAT SPREADERSSINS ME SOLDERWING STRUTS SLOTS SI STRUTS SA10 WITS THSEAS AU GLUE 1/5 SO OGlE5/5 CBS STREAMLIE ALW& TUBSREAR VIEW_____U/B U S/R BALSA I~l 3/IBSALSAI/UPIYTEGR5INAR1/16 SALSAR7R11 WI3/SD IRAN TOREUSSR TIE RUSSER iIii FLOAT FRONT VIEWS-SR10 N 1/8 SALSA ID Al BALSA RuE EUCHFLIOA I FL-ID4 I ISCALE UIIYLGE --I w ______ I/IS UIRUS FL [sj]010 GIJYTRATE WRIORELS VS SORE F-lU IFGTO IX I/SFLY FAIRMA STAG P1CM// II-mALAA FAIRWIB SLOCEFUSELAGE TOP yEW5/IG BALSA KlINE DRAIN MAHE mOM I/GA PLY OR -- -S/MSG TATOIE ENGRE ERASALI-I TUBPI-OUTLIE US PSOPELLOW-W iDAI/V BALSA COO TA OW USGS TABIID SC CABRSRETOSISI- SI OMSWIALWITHA-FUSELAGE ou VIEW/MONOFLI\ F-I ItMASS PARTS 4 WENGACHIT EIPBN TIRE010 IRAN RUSARS MWRS-ERT WATEBLANDING GEAR ITOP OUR FLAT RESSIHEllS FBOMT STRUTI ALL VMWRE FLT STRUTS ____________________________________________________________[v32][b11522097131300]]PSONT YEW AXLE-VIE FLB LEPTI Uj FLIOAt4S-IIIFL-BPLBIALL I/WI WRE OLE STRAY~11 II TIE P50W VIEW FOR ANGLE OF 610109 i/SSE KlANI/MYSAWSOYYOM COWL FRctJT VIEW L~GLSA PING-lISA PLYWOOD lEADS- V6HLSA COEES-I/SA RX OR ILIAD E3GAGBT-S/1gARAGS SW PLININDEG-VR ALUHESW PIPER J-3 CUB ESE I0I2 3456 FiREWALL -n C I cj N m z w rn m m take off water model quickly up step gradually builds up speed until lifts off takeoffs water very realistic exciting floats 1/4 wider scale rear portion floats enlarged lengthened provide adequate flota tion Surprisingly floats weigh two ounces wheeled landing gear Rubber wheels heavy floats very light Fuselage Construction Using shaded guide plan build two fuselage sides sq balsa /8 sheet balsa Glue 1/32 ply doublers inside cabin area /s balsa nose doublers over outside nose wind shield Join fuselage sides bulk heads F-4 F-5 Glue tail together add sq crosspieces Mount engine epoxy fire wall Glue ply cowl landing gear mounts F-6 7 8 9 Glue 1/16 ply cabin floor pieces leaving 1/16-in slots between pieces 1/16-in wire landing gear Add balsa doublers around window areas overlapping joints Glue two sq side stringers top glued right over fuselage side Glue balsa triangular gussets top cabin frame bulkhead F-4 Glue bulkheads F-i F-3 add top 1/16-in sheeting Trim front 1/16-in sheeting glue front cowl block Glue 1-in strips 1/16 balsa sides cowl give definition rear cowl edge Most 1/16-in sheet sanded away later during shaping Sand bottom engine compartment true large flat sanding block Begin removable cowl hold-down epoxying 4-40 blind nut A-in hole centered F-6 Drill A-in hole down center /4-in dowel cut off 9/16-in length Run -in 4-40 bolt through dowel blind nut F-6 tighten Drill A-in hole cowl block hold-down dowel screw epoxy dowel hole holding block tight fuselage Trim back cowl block line up cowl edge sides glue 3/16 balsa wedges behind cowl wedges complete fuselage side profile form duct engine cooling air Shape outside cowl hollow side clear engine Glue bulkheads F-li through F-15 two top side stringers Glue balsa between top stringers rudder stab mounts side sheets slotted later stab Also glue pieces sheet between two side stringers pushrod exits Add top center sq stringer Glue F-b sand fuselage final shape A-in doublers around win dows flat-sanded zero top match cross section F-4 wing built gluing ribs over spars Add leading edge trailing edge wing tips Build ailerons gluing x /2 aileron spars Pin X ron leading edges places glue aileron ribs Sand wing shape cut out ailerons Glue V8 ply aileron bellcrank mounts 1/16 balsa sheet under bellcrank mounts Glue ply strut horn mounts Slip 1/16-in wire pushrods clevis soldered end bellcrank Mount Goldberg aileron bellContinued page 118 28 Model Aviation Fit wing fuselage Add front hold-down dowels through holes F-4 Glue W-12 1/a plywood screw support 1/a sq top stringer Fit window blocks paint inside cabin add /8-in dowel supports Fit windshield epoxy place three steps starting front Curved outlines ot tail surtaces autnors moae cut irom 3/16 sheet could laminated three layers 1/16 x 3/16 balsa bent around cardboard form Control horn mounts ply Horns screwed mounts short 2-56 bolts 1/16 holes glue drop Safety/Preston Continued oaae 14 best spot mount switch servo tray inside fuselage most always switeh fails mounted side fuse majority radio manufacturers pro vide servo trays have location mounting switch articles weve seen instruct beginners install radio show receiver switch located fuselage side would like ask readers opin ion switch mounted way prone failure mounted servo tray rationale can think would cause premature failure switch fuselage side increased likelihood contacts may become dirty seems like forever mentioning something about hazards propellers letter Murray Granshack included propeller safety tip sure whether have previously mentioned Another hint about safety wood props tighten prop nut too much thereby crush wood center causing prop blades fly off two directions engine running think lot beginners tend suggest dont already own four-way prop wrench should buy chance overtightening prop nut will creased use six- seven-in -long openended wrench rather shorter four-way wrench Similarly using AMAstyle acom prop nut requires 5/32-in dia meter steel rod tightening keep length rod about four five Another letter subject props comes Phillip Nickell Longmont CO Phillip included some charts formulas give prop tip speed theoretical forward speed model respect prop diameter rpm prop pitch Since forward travel speed given prop pitch rpm somewhat con troversial issue going touch However including chart illustrates prop tip speed range prop diameters rpms Perhaps next time tweak needle valve ultimate top-end per formance will think about speed piece wood plastic thats fraction inch away fingers subject prop tip speed did ever think about prop noiseproducing component model recently attended AMA Executive Council meeting Ed Izzo VP District chairman AMAs Noise Committee talked about suppression model aircraft noise com mittee has constructed quiet Pattem model features among other things three-bladed prop reducing prop diameter adding extra blade can move same amount air some given rpm reduction prop tip speed consequent reduction prop noise Since us use ineffective mufflers hear engine exhaust noise According Ed engine exhaust noise easiest thing reduce quest tranquility flying field Muffler manufacturers take note some products sell under label muffler nothing short joke opinion writer long overdue establishing maxi mum sound output levels model aircraft en gines Perhaps Eds committee will help achiev ing goal Since previous paragraph has probably made us public enemy No muffler manufac turers lets see can upset few model maga zine publishers too exception MAs however Ron Sebosky Advance NC sent us clipping recent issue model magazines no MA part construction article RC Scale model author article stated fact often fly local super market parking lot agree Ron such flying site leaves something desired safety point view might prudent publishers magazines delete such statements made contributors lest others get idea club should solve flying site problems moving parking lot local supermarket chain True model con struction article small 38-in -winspan /2A power could still cause serious injury should hit person could totally unaware parking lot being used airport rather just place parking ones car last item round out months epistle comes Flight Line News newsletter Conejo RC Modelers edited Art Addington title Safety First Flight Courtesy Some time ago adopted rule first flight aircraft would done solono other aircraft sky As rules go has slowly lost its presence result ero sion evident two weeks ago young man asked would help him first flight did safety check took wing off another flier check controls make sure properly rigged Two other fliers up takeoff little wild nose steering too sensitive say least made ourselves known other two fliers plane far out trim would climb idle very little roll control landed plane deadstick pushing forward elevator control little work pits another flier helped put new plane up takeoff scared H--- out other flier up new model almost hit him did same thing twice trying land fliers comment dont put plane pits leave Good advice Leave until can fly its lonesome leamed lesson hope telling will save accident also hope relating story column other clubs might give some thought requirement first-flights model should performed no others air Have safe month John Preston 7012 Elvira Ct Foils Church VA 22042 Piper Cub J-3/Reese Continued paqe 28 cranks drill down through outer hole bellerank 1/16-in drill through balsa bottom drill running rotate bellerank gently cut curved slot pushrod exit Build wing center section stacking ribs spar joiners 1/16-in balsa bottom Trial-fit wing panels center section everything fits easily add top 1/16 sheeting center sec tion Epoxy wing panels center blocking up wing tip /2 Use 1 under tip dont use ailerons 118 Model Aviation Nick GIANT RIC SCALt f-LAN DESIGNS 2 4 Cu size Engines AT6 TEXAN24 1101 Span$2700pp uSA POKKER DR127 I63 TIp$2500pp USA FIF BEARCAT2/ 166 Span$2700pp USA CURTISS P-4024 19C Span$2700pp USA FALl CORSAIR2 192 Span$2700pp USA Fiberglass Cowlings & Canopies available also send slamp far derailed bocbureS an Gianl scale Accessarles Oar Plans ned Poslpaid wilbin Ibe u5Al 0. S Sand off bottom edges spar joiners spars Fit wing fuselage Drill two /8-in holes wing through F-4 glue V2-in lengths /8-in dowel holes wing leaving A-in protruding front hold-down Glue W-12 V8 ply screw support A-in sq top stringer Drill install #4 sheet-metal screw hold wing place Glue piece /8 balsa over top front F-4 cover dowel holes Glue two balsa fairing blocks sand shape Paint inside cabin yellow area over instrument panel flat black Add A-in dowel cabin supports also painted yellow Using pattern cut out windshield clear butyrate available Sig Manufacturing Co Fit fuselage Epoxy windshield place three steps starting front Make tail surface outlines 3/16 sheet laminate outlines three layers t/16 x 3/16 balsa soaked few minutes hot water wrapped around cardboard form white glue between layers Hold laminations together pins until dry Add 1/16 x 3/16 ribs Join elevator halves length A-in dowel glue / ply horn mounts Sand edges round Cover stabilizer elevator install hinges Cut slot fuselage stabilizer Trim away covering center stabilizer sides fuselage glue stabilizer place Give entire structure coat Balsarite seal wood spite best intentions occasionally everything gets wet Cover rest model Yellow MonoKote EconoKote use matching yellow MonoKote trim over window areas edges iron-on covering heat iron will melt windows iron covering just edge windows Use black MonoKote trim side stripe numbers little Cub logo rudder hand-painted using Pactra Namel plastic models tail wheel unit made thin sheet brass 3/32-in wheel collar tapped 4-40 bolt wheel yoke horn sol dered wheel collar completed assembly attached brass arm /4-in 4-40 bolt screw tail wheel tight model will ground-loop swivels Tail wheels locked full-size Cub takeoffs Use electric motor brush springs con nect rudder horn wheel horn springs soft will allow rudder move tail wheel locked engine doesnt idle slowly enough inverted taxi anyway main landing gear exercise wire bending 1/16-in piano wire Take COMPLETE LINE OF AMERICAN MADE ENGINES ENGINESFROM RJL IN 198311 MODE MOTOR JG high qraahiy stat l~od 05* entire sing inns Iwerery wdoles SOnlosg 555 isrlm alt oish SO Os vaeriS iss onesinvoss nOses detoise csdhvsss LSDASSTO OIlY $635 Calif realdefits add salsa tax T61 A/C SWIALE SCHNUEALE T 61 wrIl inn hnssted production during 1963 Swine ports increase fuel economy robbing power Features include Forged Piston Con Rod hardened steel cylinder single ring double ball bearings investment cast crankcase B19 B40 U-CONTROL 91903900 840 $4900 perfect engine fur Ucontrol flying Improved bypass low tensiun dykes ring make B40 gig euceptiunal values Muffler will soon available 519 U/C available now K61 A/C Schnuerle ported 61 provindes nsith easy starting high perform ance longevity FEATURES tFLUOg notonoln Poetoids Roo Curt DwAto eon Forgtd Anon Poo & Con god Ro*od Coomlg Rod 0-rg nodon Sod Con tS lOCus 15500 U Send 1 00 Complete& Key Chainasua tw5 hss stinn inOnnon doss 500S Priss osd Catalogoislabisry udsloo ins rhargo MADE IN AMERICA AMERICAN TECHNOLOGY RJL Industries ox 5654 Pgun CA 9110Ph@nw f213J 3560016 time make bend carefully Adjust bends until will sit flat table screw fuselage fore soldering Bind junctions fine copper wire solder Solder 3/32-in brass tubes over axles used Kraft 13A-in wheels because smooth hubs hubs sanded painted yellow A-in black edge make hubs appear smaller word Cub hand-painted center hub fine brush black Cut two I-in lengths 3A-in K&S streamlined aluminum tube covered yellow trim bungee covers Wrap hooks landing gear rubberbands bulk rubberbands will hold bungee covers place floats built Vs X 2-in balsa tops 1/16 balsa bulkheads sides bottom Lay x 2 x 18-in tops over plan mark bulkhead locations draw center line Glue bulkheads place add sq keel Glue FL-lOs FL-l make boxed slots aluminum spreader tubes Glue float sides bottom Glue nose blocks sand shape Cover floats 3A-oz K&B glass cloth resin Use toilet paper blot away ex cess resin resin too thick add little acetone make easier work dry sand lightly glue sq balsa chines 1/16 sq top rails Prime paint floats silver Cut slots spreaders join floats spreaders epoxy Mount 1/16-in wire float struts fuselage Epoxy wire struts holes drilled floats Solder middle strut front strut top made steerable float rudder works rudder 4-lb monofilament fishing line linkage However dont use it picks up weed algae water during takeoff run prevents takeoff steering does work Continued page 122 BE LEADER { Join NATIONAL FREE FLIGHT SOCIETY help develop threshold low speed aeronautical technology NFFS AMA special interest group promotes scientific nature model aeronauticsyear ly publishes SYMPOSIUM volume 10 issues NFFS DIGEST AGRESSIVE participate THINKING group Send membership applica tion HAL WOODS Printer 1 YR 707 Second St 2 YR Davis CA 95616 Checks Payable NFFS JR SR/OP 7501500 13502700 April 1983 119 Made USA QuaIItl 014800 IncludIng Muffler relIabIlIty awvIoe AMERICAN MADE B19 and B40 RADIO CONTROL 919 t69940 57900 best bet beginner Sunday flyer lwproved bypass low tension dykes ring give plenty power Equipped Perry carburetor new RI [ muffler fly water important protect radio Cub small does lend itself waterproof com partment Therefore recommend read follow directions water proofing radio Radio Tech nique column George Myers Feb mary 1982 issue Model Aviation ideal prop Cox TD 09 old Cox 7 X 3/ no longer make 7 x 4 little too much prop TD 09 50 should cut down about 6 rebalancedor use 7 x 3 model Cub flies pretty fast Cub control response very good Ai leron response slow-flying highwinged airplane usually sluggish fly ing Cub little faster keeps response normal Remember dont try rush Cub off water will take off ready Enjoy Cub always some thing special about Piper Cub no matter large small Radio Technique/Myers Continued page 31 coreless-motor servo higher inch-ounces per Watt equal transit times duration flying want coreless-motor ser vos Although cant prove test data fact basket CM much lighter armature conventional motor leads suspect CM will resist shock vibration damage better potential advantage reality rests design manufacturing techniques First look Tower 500 youre like arent inclined take new crop lowpriced radios very seriously case point new Tower Gold System 500 offers plug-in crystal right front panel dual rates aileron elevator servo-reversing ai leron elevator rudder throttle electric trims trainer button output meter Ni-Cds charger receiver four servos less $150 paid just receiver 1971 Pro-Line As matter fact wouldnt looking hadnt sent Tower Hobbies along what essentially challenge Try before make up mind came crystals both ends 72MHz band right middle channels 12 40 56 exact According Towers Bill Bax ter sets come crystals Tower plugs whatever request stock 001% crystals check 100-ft ground range transmitter antenna collapsed receiver antenna dangling out box inside warehouse Never take advertising too seriously tried same thing Theyre right Testing transmitters nearest RC channels set ting exposed transmitter antennae same lengths found Tower trans mitter far away possible moved adjacent-channel transmitter until servos just began jitter distance ratio 201 equates very good performance dont claim narrowband performance say its narrow enough today son Tim screwed Tower Gold 500 well-used Quickee 500 went out some flight tests didnt try everything book Tim did take plane up high hard see maybe 2000 feet col lapsed antenna retained full control antenna down 3 exposed Since testing servos column tested Tower TSS-50 servo found better average Output torque 40 in-oz 900 reversed-cycling transit time 5 sec onds Airtronics servo number9455194554 Torque turn Output Wheel no volts26 06inch-ounces Idle current no control pulse77milliamps 900 Reversed Cycling transit time0505seconds Free-running current12040milliamps Stall current600800milliamps Volts stall4848VOC Stall Torque3560inch-ounces Motor typeConventionalCoreBess 122 Model Aviation can make want looks NEW RADIO NEW RC CHANNELS great easily removed prob WRIGHT FLYER JILl lem 1/2 SPORT SCALE40 ENGINE LI Wa e ed ogged drive coupled wing-warp/rudder GEORGE MARSOEN $19500 Plus Shippine 7621 Mary Cassalt Drive Potomac Md 20854 BUILD WITH THE FINEST IN RC COVERING MATERIALS CECONITE RC FABRIC Heat shrinkable up 10% Will over lighten Attached dope Apply direction Fill weave dope 66 inch width Clear Very strong 18 oz/sq yd 1 yd length 1183 sq ydl $695 3 yd length l59 sq yd $1995 5 yd length 916 sq yd $3195 FILLER COAT Water base paint replaces coats ol clear dope Apply 1-2 coats loam rubber brush Dries 30 minutes 1 01 covers 75 sq S Fuel proot gas glow Use over Ceco nile other tabrics Protects tabric trom sun Apply type ol color paint over Filler Coat Pint $895 Quart 95 SUPER SEAM Lacquer base glue Used standard model building cement Also extra strength applying Ceconite other labrics Clear color Sands easily dries quickly Quart $995 ORDER DIRECT OR AT HOBBY SHOP MASTER CARD VISA accepted USA add $300 postage tax Nevada orders Add $200 COD Send $1 00 information Jerry Nelson Sc Company Post Office Box 12863 Reno Nevada 89510 702-322-0664