NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157
Edition: Model Aviation - 1989/06
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 156, 157
NO OCR TEXT NO OCR TEXT scrap wood corrugated board carrying frame solution transporting set ting up wire-braced monoplane Model held place frame rubberbands can handled stored vertically first step setup wing removed cradle Stub dowels wing slipped matching holes wing mount wing tip propped up padded support flying wires slack Second step Attach prop up second wing its support Wing wires normally kept attached wings fuselage Wings can detached fuselage remov ing six bolts fuselage wire fittings Left Last step Landing wire fittings snapped together behind pylon slipped up top tightening wires like stringing bow screw inserted through fitting pylon Right Off frame ready fly fully assembled plane can left sitting frame engine can run helper radio engine can serviced model frame wings cradles particular year Theyre wonderful source detail drawings Scale modeling pur poses Luckily 1933 Flying Manual cluded working drawings full-size Longster prototype model scaled plans dimensions photos text found its pages Except uses model airplane materi als quarter-scale model exactly dupli cates structure full-size Longster other deviations fullscale airplane balsa blocks en close hinges model engine mount ing method attaching wings center section provisions RC equipment As home-builts scale struc ture very like old Free Flight gasoline-powered modelsmy Longster weighs 6 lb pilot has 125oz/sq-ft wing loading weight wing loading OS 40 flies model very well smooth takeoffs grass efficient climbouts exemplify low power requirement airplane flying lightly loaded wing Old Les smart enough know such long sail plane-like wing could take off fly safely 26-hp Henderson fourcylinder motorcycle engine 0S 40 giving approximately same power loading Les Longster model accu rately demonstrates full-size plane Len ne quarier-scale pio looks rewiajic grouno unu mc air Jo ivlax 40 tour-cycle engine scale height Because planes light wing loading relatively small engine powers large model very well Right Model exact scale duplicates parts shown plans full-size airplane Fuselage constructed birch dowels spruce wing tail constructed balsa 26 Model Aviation LSR TE 6rQcK /J2 aRLR a1EET igfl WE VERTGRR IN NBill Weaver 4 D DOI X 4 BL /z BRLSfk SHEET IL BRLR %DIR RLLJMThBE 9 N PLY / IV \3 PLY WVDmiA 2/ 14 2RL~fi SHEET 14 QPRUC F1RD ALUMiNUM $~FRUCE RUBBER RINGS 2 61- I\V BLA EET 2 EL 16 Qc9PRUC& O3PRUC x x4 BL QRTOP&T BRL3R VERT GRRIN -A 7 N 7N-N N ictvEi VINTP16EWIIU-1~RLR E/7N 4 3Q PRUCEPRR1/ 027 DI4 C/L CABLE 0& F&40 12-5 PR0P r T V 5 2 7 0 a m CD 0 0 CD 0 0 U 5 5 0 U 5 flew Longster slow stable flier will make deliberate scalelike loops rolls slips center-of-gravity shown plane will hold true spin two revolutions before diving out models disadvantage unlike full-size plane wont stand up winds greater 15 mph scale equiv alent 60 mph Longster exactly scale cause replicates very simple airplane cant expected rival world-class Scale models fighter aircraft trimotor transports ilk beauti fully crafted Scale contests today Rath er everyday sport flier intended expression respect liking Henderson Longster original Most challenges encountered sport flying Scale model have solved design Transporting setting up wire-braced monoplane presented obvious problem simple solution carrying storage frame wings have stub dowels plug wing mounts upper landing wire fittings center section pylon two pieces fit together Upon arriv ing field set airplane its carrier ground take wing time its cradle plug center sec tion Propping up wing tip two corrugated-board supports bring landing wire fittings together just behind pylon slide fitting top pylon install screw Camming landing wires over pylon tightens up whole system Its like stringing bow ex cept effort required entire operation takes minute less time attach lot rubberbands Reverse operation remove wings lower flying wires remain attached allowed sag down rest two corrugated-board pieces side frame beside cockpit area wing can removed necessary taking out three screws attach flying wires fuselage either side PLY 3/850 MAPLE-T MOTOR MJNT 3/18 BALSA SHEET SULLIVAN RST 6 OZ FUEL TANKPINE IA SO SPRUCE BOTTOM /X 1/32 HARD ALUM FUELTENSION BAR GUTTER 1/4SO SPRUCE 3/I SO SPRUCE N CARPET THREAD LACING SO SPRUCE / TOP VIEWBOTTOM FRAME 1/4SO SPRUCEOF NOSELOOKING UP2-561/4 LG SCREW LOCK WASHER 6 NUT NUT OLDERED TO MASS TUBE3/32 BAI BRASS PYLON LAND WIRE3/16 BRASS FITTINGTUBE 1/4 BALSAIi SHEET UPPER 1/4 SOI/4DIA DOREL SPRUCE1/4 DIA ALUM TUBE______ NOSE SIDES TRUE LENGTH FUSELAGE NOSE SIDES1/16 BALSA SHEET Cr-DSEAT BACK GAS TANK___________________ 05FS-40 ENGINESELF TAPPING SCREWSDGA DESIGNS PILOT BALSA SHEET 4 3/6 SO SPRUCE USE 12-5~ r-AlLY SERV1TRAP 1/4 SQ SPRUCEj5FF S DOWN THRUST1100 MAH RUD B ELEV3 32 BALSA SERVOSSHEET 1 -NSIlT 325 BALSAIROFI ALTER FROCTO TURNBUCKLES SET TAPE PINKEDDOUBLE SIZE BOX 1/B LITE PLYFRONT FLYING WIRE P1 DOOR 4-3/B WILLIAMS BROS012345B VINTAGE WHEELSI Because design model carrier dictated scrap lumber avail able no plans included item photo guide visually youre pretty much open territory carrier though wing cradles lined Left engine fuel tank throttle servo installation 1/B4 plywood cowl can removed access brass tube landing gear scale Rubber shock discs 0 rings CyA-giued stack Right receiver-servo tray can removed through cockpit re moving two screws Wing servo leads connect just below cockpit edge location aileron cables original plane 28 Model Aviation Full-Size Plans Available Page 196 FUSELAGE TOP/BOTTOM VIEW L4 DIA DOWELS NOTE LOCTITE ALL NUTS BEFORE RUNNING ENGINE N/C COMPONENTS SHOWN ARE TOWER HOBBIES SYSTEM-500 3/16 SQ SPRUCE 5/16 50 SPRUCE I/S LITE P Y 7A II SPRUCE LW LTE PL L4 SQ SPRUC SECTION B-B 1/4 GA DOWELx N LUUL UI TRIM COLOR FUSELAGE 4 0 DOWE 36S0 IA\3/16 50SPRUCE yALSA SECT H H /SECT GO DOWEL SADU-BRO NYLON KWIK LINK SECTION E-E6 RIGGING COUPLER DOUBLE COVERING [F3/1650 SPRUCE SIDE _____ ULLIVAN GOLD-N-ROD PUSHRODS 1/9 SQ BALSA C4-L-- FUSELAGE FLOOR plastic foam Also allow air plane carried stored vertically used hooks rubberbands wings N 5/321/2/ - BALSA 2AL BREOD ANTENNA TUBE IS OUTSIDE TUBE OR SULLIVAN PUSHROD V PINE____ GOLDBERG 263 -1/8 LITE PLY I/2A C/L BELL-~4--11414k CRANKS ALTERIl AS SHOWN ~6~ 0 ORI RH WOODJQBLELEO SCREWS-TYPICALSECT i-JL32 HARD ALUM IIIPLACES EQUIRED NOTE COLOR SCHEME OF ORIGINAL AIRPLANE ALL SILVER ALUMINUM WITH RED OUTLINE TRIM LANDING GEAR 8 NUMBERS ARE BLACK landing gear front tail Since frame extends beyond air plane sides saves lot hangar I/B DIA ALUMINUM TUBE 2 REQUIRED STABILIZER STRUT 5/32 BALSA SHEET N5/32 LS 1/4BAL BALSAN SIIEET N II II BALSA RUDDERI 3/16 1/4 LBALSA 5/32 BALS BALSA SHEET 00-90 SHEETNUTS 8 BOLTS 027 DIA C/L CABLE1/4 WIDE TAILSKID MADE PROM -SAW BLADE TAILSKID WIRE FITTING FIN B STAB ATTACH PITTINGS-I/32AL1/32 ALUMINUM B REQUIREDSPECIFICATIONS WING SPAN90-3/4 LENGTH55 DRY WEIGHT6 LBS WING AREA1102 SQ IN WING LOADING 1255 OZ/ SQ FT ENGINE40-48 4-STROKE MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO rash carrying transporting such large model carrier also comes handy hold model run AMFFT AE Details pylon landing wire fittings hardware email bolts turnbuckles tubes etc scale can purchased almost model shop brace wires made Control Line cable Right tail control surfaces actuated pushrods CLtype belicranks Short cables belicranks run scale control horns exit fuselage covering correct scale locations June 1989 29 engine Additionally makes easier work repair service model frame can reach engine tank removing cowl instance access receiver-servo tray removing seat back false floor four screws two screws holding tray radio bat teries can reached through hatch nose under engine Suitable engines 05 40 0S 40 48 Surpess Saito 40 45 Longster designed around engines power weight range Dont let talk substituting 60 larger engine model doesnt need power would out scale extra weight would throw out balance surplus power would destroy whole concept structure sufficiently light strong designed first test flights proved model stronger expected Having climbed about 20-ft al titude after takeoff airplane probably due some still-unexplained radio trouble suddenly dived ground stall ing Though hit ground very hard wings flew off carnage lot less might have landing wires sheared off attach screws spars right rear landing gear leg buckled both prop blades broken off balsa dented scratched hind prop no other structural damage no shattered punctured cov ering mishap clear evidence wear-and-tear everyday sport flying wont intimidate model Construction Ill limit myself rather general descrip tions construction procedures used same time want share under lying rationale express some phi losophy about building should enough interesting detail satisfy craftsman types like build well fly Wing aileron tail Since theyre made primarily balsa wing tail can completed rapidly using cyano acrylate CyA adhesives youre allergic CyA white glue will work just well Editor Anyone witl allergy ordinary CyA should try Hot Stuffr UFO After drilling balsa fittingscrew holes apply drop thin CyA side holes removing hard ened fibers reaming original drill produces nice hard-walled hole take screw bearing-loads 00-90 0-80 screws scale equiva lents /6- A-in bolts used original working brace wires put maxi mum bending loads wire attach points rather center cantile vered wing flight loads distributed several points along wing spars 70-lb -test cables assure wing can support flight load will encounter Locating aileron servos wing I-III F-BLACK/ K#JL EXTEPNUMRS~ION~----- \ \ SECT K-K8-12 LBS C I/8LITE PLYII IV16 BALSA WEB-VERT '~ I/Bz3/B BALSA GUSSETS -H-- I6PLY 1/16 BALSA WEB3/IBxI/4WING P LEFT SIDE VERT GRjINSPRUCE SPARS LWDIA DOWELTOP AND /16 PLY 3/32 BALSA SHEET RIBS 8 SUB-RIBS -A- IJL JL JlZ~9O FRUT32 HD ALUM BI/4SO 3/18 x /2 BALSA LEADNG EDGESPRUCE AlL SER SECT M-M I/BLITE PLY RIB SECT P-PSECT makes simple provide travel differen tial run 2-56 tap through servo nylon Qwik-Link pushrod can easily turned outside wing cover ing adjust aileron neutral location servo wires run down connec tors cockpit duplicates ai leron control wires full-scale ship Fuselage central problem reproduc ing welded steel tube fuselage frame wood crossmembers longerons diagonals form beamlike trusswork will subjected either tension compression loads depending way structure loaded twisted Since structure welded unit its un likely tube members will fail tension However structure can buck le under compression wood frame structure joints tween members longeron breaks depend strength glue take tension loads balsa structures glue joints under tension will no stronger soft porous wood theyre made However after doing some testing pieces dowel spruce unimpressed strength hard wood glue joints Since Ambroid proved just slightly better CyA white glues chosen project glue tests involved applying several coats form fil lets joints especially concerned about area forward under wings flight loads wing wires engine thrust loads landing loads try ing pull joints apart Lacing joints together strong carpet thread pro vided happy lightweight solution After fuselage completely glued used 46-diameter drill pin vise hand drill holes joints connected covering sides grooves cut X Acto knife would pass under landing gear disc fittings showing through covering 30 Model Aviation Full-Size Plans Available. See Page 196 3/16 1/2 BALSA LEADING I/B LITE PLY X / 2-flA LERON SERVO H3A6V4 ALSA13/32FILLERI-\HINGE LOC H TO AIRFOIL 1~ BALSA /VB SO BALSA VBLITE 7/B 3/8 BALSA6 I/S / 0 t/B,3/B BALSA / /J / 7 5/32 I/2 BAL3 ELEVATOR /I/4 GAP ALL CONTROL SURFACES /SCALE / 4 LAMINAllONS OF 1/16 1/4 BALSA T N p ---II3A6d/4 SPRIX /1PLYWITH 3/32R LSLTETOP 8 BOTTOM /4 BALSA1/8 BALSABALSA TOP SHEET-HINGESI-EET VERTFILL SUPPORTGRAIN L4 BALSATYPICAL HINGE S/I6 1/4LOCATION SPRUCE LE 7Iriii 1/32 HO ALUM HORN 2 THREADED 8 NYLONFLATTEN ROD EL LINK8 DRILL 1/16 ALTUBE DUMMY00-90 SCREWS PUSH ROD job lacing good trick also useful wherever need put thread through holes wing rigging Rub ber Scale model soak thread end case about inch longin CyA glue give shot kicker Presto now have needle guide thread making work much easier Finish off glue metal tie bar runs across bottom wing rear flying wires carry tension loads tension fabric cov ering behind wing holds crossmem bers diagonals glue-fillet sock ets Note diagonals cut fit against longerons rather against uprights provide gluing surface viewed cross section fuse lage metamorphoses rectangular shape cockpit triangular tail Its interesting structure build constructing small fuselage sides cockpit box landing gear disc fittings must slid over dowel lon 0 FILLERCLARKY AIRFOIL SCALE PIECES 5/32 BALSA SHEET RIGGING POWTS YTABILIZII -5/32I/2 BALSA LE 1/4 BALSA HINGE LOC It1 L4SO BALSA BALSA SHEET SANDED FWSH 5/32 BALSALWITH LW SO SHEET TIPSSPARS NOTE ALL HINGES ARE ROBART SUPER HINGE POINTS 115 SB LITE PLY SECT S-S TI VIEW T-T gerons before uprights added slots allow crosspieces uprights straddle trap discs can cut hacksaw band saw build sides flat plan cut slots plan grooves Homosote top building board disc locations After building sides filled Homosote grooves spackling compound assembled fuselage structure tack ing thin CyA followed after dry ing several coats Ambroid Thick CyA whatever think best may substituted Ambroid desired engine fuel tank adhered GE Silicone II Household Glue Seal pur chased hardware store prod uct also used seal around hole engine servo lead passes through engine mount plywood Sealing hole keeps oil spray leaked fuel out airplane confining spillover area above engine mount plywood front dash Any tank leakage will ELEV STAB CROSS SECT -LAMINATED WING TIPS SECT R-R SHEET 2 O 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONGSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO noticed drains out joint bottom cowl drainage prevents fuel reaching engine control servo exterior oil side engine tank area oil-proofed giving surfaces coat six-minute epoxy thinned slightly alcohol inside cowl also coated epoxy allows lot flying fear models becoming oil soaked Clear Hobby poxy urethane varnish could used place epoxy Landing gear landing gear parts built assembled fuselage latter blocked up flying position square building surface stock size 3A6- TA-in-dia brass tubing exactly scale 1-in-dia 1A6-in-wall steel tubes used original airplane 3A6-in dowel inserts rear leg always first landing gear component June 1989 31 LAN RIGHT SIDE fail impacthave added plan since previously mentioned crash help prevent buckling hard landing tach doweling few drops thin CyA allowed run down tube Y6-in dowel slots end clear 42 brass plate used spreader bar align short A-in tubing axles provide proper tread during soldering Assemble shock strut fuse lage still accurately blocked dont add lower shock-disc plate extend hole travel-limiting screw Y6-in lower portion just yet thing checks out OK lower portion locked place squeezing upper por tion slightly C clamp travellimiting screw holes transferred A-in tube through 3/6-in Use 1/64 PLYWOOD - 80 NUTS AND BOLTS 1/4 DIA DaWEL 1/4 SO SPRUCE 3/16 DIA DOWELS 1/4 50 SPRUCE COWLING TANK \ 1/32 HARD AWMINUM I/4 I/2x 3 V RCVR SWITCH MO INTINGS HARD 6 REC SECTION C-C small rat-tailed file elongate hole about in Y6-in tube Reassemble shock strut rub ber shock-disc stack lower brass disc plate Solder disc place ex erting enough pressure against rubber take out play Made 0 rings shock discs stacked squared 6-in-dia rod Holding rod horizon tally apply drop thin CyA glue joint between 0 rings adhesive will wick around entire joint bond 0 rings tube can assem bled shock strut rings have much less contact area flat rub ber discs original airplane quite stiff probably function dur ing hard landing Both outer inner wheel-retaining collars may either turned lathe aluminum brass assembled solder pieces brass tube washers same applies landing-wire pylon fit32 Model Aviation Non-scale structure blocks control surface hinge locations Robart Hinge Points give scale appearance gap blocks show after modeL covered wing structure scale except solid ribs wing wire fittings spar rein forcements scale original airplane simple efficient model-like construction old-time barn door ailerons actuated servos mounted wing allow differ ential travel makes aileron-only turns possible enhancing realistic flight characteristics Full-Size Plans AvailableSee Page 196 PINE RUDDER SER PINE1/8 LITE PLY RECEIVERII SERVO1/8 DIA DOWEL SPREADER BAR PINE LE STRAND PROM COPPER STRANDED W RE TYPICAL CABLE EYE ATALL WNG B TAIL RIGGING IS TIJNRBUCKLES-SOLDER027 STAINLESS C/L CABLE WITH ACID CORE SOLDER TATONE INSTRUMENTSLTIMETER 11/16 7/ITACH / PRESSLREUNKNOWN / CHOKE rTLE DASHPANEL TE PLY-PAINT FLAT OR VARNISH-STAIN ~1r7 IIK 1-1/2 SCALE DIHEDRAL LW DIA DOWELS PUSHRODS / K U SECTION 0-0 IGN IT ION SWITCHSOLDER FILLET L4 BRASS TUBE ALL LG NUTS 6TRUE BOLTS ARE O-8OLENGTH ALL BRASS IS STO L4 DIA TUBEBRASS 4 REOD 3/S2 7/16 ID 5/8OO NOMINAL SIZE ORINGSI24I 27/64OD 5/16 ID 3/B LONG L/4DIA BRASSDOWEL 0 RING GUIDES-GLUE TUBEEND PLATES -I3/16 BRASS TUBE 1/16 DIA 1/4 LONG ROLL PINS OR MWI/4OIA BRASS TUBE 450 SPRUCE SAG SO SPRUCE 1/32 HARD ALUM U REAR FLYING WIRE - PULLS 0-BO NUT 8 BOLT 0 NUTS AND BOLTS u-U tings Proctor turnbucldes may used scalelike taper metalworking lathe amateur machinist friend available used Loctite hold inner wheel collars place joints pylon between aluminum tubes brass tube top-fitting Assembly rigging rigging control wires 027-in -dia stainless steel Control Line cables Being softer music wire cables rather easy form eyes shown drawing Make eyes fit 00-90 screws turnbuclde eyes Tinning stainless steel re quires acid-core solder finish soldering wash wires water re move acid flux residue Prior covering model should otherwise completed rigged have RC equipment installed Its easier reach assemble components covering Loctite rigging wire attach DVIUD SERVO TRAY 3/16 DIA DOWEL z7i ASSEMBLY OF VARIOUS SECTIONS OVER PLANS ASSEMBLED Pr1 BOX K. ADD WING STRUTS B NOSE ADD REAR BOTTOM FRAME AFRAMES B TOP SOLDER JOINTS WITH / 4%SILVER 96% TIN SOLDER w ADD DIAGONALS STRINGERS DASH B FIREWALL FUSELAGE FRAME ASSEMBLY SEQUENCE SHEET 3 OF 3 MODEL AVIATION LES LONGS 1933 HENDERSON LONOSTER 1/4 SCALE R/C MODEL AIRPLANE DESIGNED BY BILL WEAVER TRACING BY JOE DEMARCO hence bottom wing paral lel floor Make two wing props corrugated paperboard tops should about 110 higher distance lower surface wing ground line wheel shown fu selage side view drawing Attach tumbuck les fuselage pylon fittings set half-travel Plug wings center section prop up Drape thread weighted end over tip ribs high point adjust props until have 110 dihedral measured 1R-in root rib Positioning pylon vertically tape temporary brace pylon wing spars Feed wing wire through its turnbuckle eye bend back tape Unwind turnbuckles remove wings Form eyes cable bends solder Reassemble wings adjust top turnbuckles achieve final wing align ment dihedral Tighten lower LANDING 0I23456 bolts spars before covering Youll need cut relief grooves parts structure clear rigging wires con trol wires theyre installed Some wires will run through wing rib Rigging airplane requires large sur face absolutely flat Assemble tail surfaces fuselage first air plane sitting its wheels adjust wires turnbucldes until vertical hori zontal surfaces true Loctite turnbuckles Heres toil getting landing gear fuselage align ment exactly right will pay off Finally make stabilizer struts fit airplane tighten elevator rudder control cables just enough take out slack 027-in diameter ca ble has no elasticity will transfer ten sion loads bellcrank pivots produc ing high friction servos overcome rig wing prop up rear fu selage until top rear razorback June 1989 33 youVe ever fuel tank split leak fuel fuselage know important install tank can trust Du-Bro Products manufactures complete line rugged polypropylene tanks 10 convenient sizes 2 oz 24 oz guaranteed life against splitting leaking money back tank comes complete soft brass tubing hardware Protruding front lip prevents fuel lines being crimped hard landings Single twin vent design gas conversion stopper available use tank gasoline Cat No 400 Visit local Hobby Shop fuel hook up accessories Fuel Can Cap Fittings 0 Fuel Tubing Tank Filter Kwik Fill Fuel Value GaS Gb Fuel In-Line Fuel Filter Kwik Fill Fuel Pump turnbuckles just enough take out slack point should able sense tightness top wires plucked Thats because pair top wires now has four semislack wires pulling against Adjust top bottom rear spar wires give /16 washout tip ribs Hold wire eye ends adjusting turnbuckles prevents cables winding up due thread friction would throw two thread engagements off balance predispose cable unwinding loosening wire first jar youre happy adjustment put Loctite both threads turnbuckle Bind A-in spreader bars wires thread cement paint silver Position bars intersection X brace wires keep touching causing radio noise fixed wing rigging can folded removed worry will return its proper position replaced just solid struts used Covering Use fabric such Coverite Sig Koverall Both texture finish plastic films would clash charac ter airplane silver Permagloss Coverite used prototype unfortu nately no longer being made White Super Coverite finished spray can what ever silver model paint prefer proba bly best alternative used Aerogloss Stearman red trim numbers cut black Coverite Graphic Trim Sheets slid place soapy water rubbed down Coy erite bonds well itself needs extra ad hesive contacts wood Use Balsarite Sig Stix-it wood surfaces Dont cover rear fuselage bottom un til control wire openings located side covering wires threaded through Refer plans location holes landing wires wing top covering Thread landing wires through loose covering before ironing place Errors can corrected double-covering patches slid over wires ironed down after final sembly attach points X brace wires two triangular openings bot tom wing inboard spars Pyralin doors covered wire attach points full-size Longster simu lated model thin transparent plas tic notches clear wires Balance model point shown drawing %-in-dia dowel rod probably have about lati tude fore aft indicated point greater deviation may cause trouble Differences engine weight RC equip ment covering finish etc could con tribute excess weight nose tail Compensate substituting 800 500 mAh Continued page 156 34 Model Aviation Hand-cut quality kit includes rigging scale control setup wire parts pre-bent custom brass hardware parts individually identified pack aged Complete decals sEngine sizes 45-50 ES Wings fold next fuselage full scale removal four bolts Rigging intact setup time under 3 mm swing span 55 Stand off scale $15900 Add $550 P&H US orders $1500 Foreign Orders video catalog $1500 post mci vHS/Beta Regular catalog choice otMin Plan$300 Hand-Cut Quality Affordable Price AERODROME MODELS LTD 2623 S Miller Rd Saginaw Ml 48603 81-3000 Other kits available Aero-Pacer Baby Pacer Curios Jenny Flybaby Flybaby Combo Hawker Hurricane Land Jester PRODUCTS FORT misaumi IflflSI g Complete Line Exhaust Systems * Tuned Pipes Muffled Tuned Pipes * Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems UnsupasS lwhO 15 tekS F 9eoofld EZUP Shelters E Z tre fu y se f conta ned sturdy steel tubs natruct N ooSS parts0tr p over NO 06nterpa e NO roPe tO m n eture * foil ofl youra roraft 10 x1 Sturdy fadS resint jed Blue nylar tOP pius up sTEPOAISOEm Kentucky reSdC~ add 5 saleS tat prodUCtS Ltd John peck Leiuur 5evenWood0 MAK yZBV AMA 05800v-s5iIiCs gster/ Weaver Continued page 34 batteries 1100 mAh ones shown model nose-heavy adding lead before installing batteries tail-heavy small-scale tail surfaces require ward center-of-gravity location good sta bility control Miscellaneous Paint false floor seat back black followed application Sig Flat-Coat Make gas tank /16 sheet balsa cover tissue apply few coats Sig Lite-Coat plastic cap large toothpaste tube did service gas cap Spray tank assembly silver glue dowel crosspiece sits upon convenient point during wing assembly Though tank trapped wings pylon glue prevents falling off wings removed pilot quarter-scale full-body fig ure made DGA Designs kit As con struction model progressed ever became apparent wing limited ones view cockpit pilot cut off waist elbows false floor made Thats help keep ing flying weight down since trun cated pilot weighs 2 oz Acrylic paints used touch up pilots face rubber parts face helmet etc given two coats Sig Flat-Coat protect against engine oil spray No windshield indicated original plans photos Quite possibly cruis ing speed 60 65 mph wind use ful airspeed indicator judging turn coordination corrugated board props intended supporting wings making rig ging wing wires can also used carrying frame attaching detach ing wings requires cutting off tops match bottom surface wing model resting frame wing 00 dihedral angle lower wires can remain slack until upper wires stretched over pylon 00 dihedral about right will allow uneven flying field surfaces model calls materials rela Safety/Preston Continued page 153 field wrong antenna transmitter planning use got field selected frequency pin corres ponded channel markers antenna turned transmitter caused other fliers model rekitted However friend aware time cause crash short later friend lost own model another flier turned transmitter same frequency friends transmitter Again nobody could figure out cause crash tt wasnt until friend returned home putting equipment away work shop discovered transmitters fre quency did match channel markers antenna Well expensive error could happen us have transmitter same brand different frequencies Another in-flight fire Judging some photos A-scale Pogo sent Greene NY modeler Frank Williams very lucky in-flight fire did result explosion Frank gave photos short explanatory note John Worth attending recent WRAM show model powered Zenoah G-38 has its muffler secured rear cylinder two bolts Apparently both bolts became loose during flight allowed hot exhaust gas impinge directly Onto firewall photos included months column shows hole burned through fire wall very melted gas tank also ap pears have hole burned Franks note said model kept flying landed being aware what happening wasnt until attempted refuel model discovered fire Two other photos havent included show charring inside fuselage wing saddle After looking pictures am extremely surprised fire did cause model explode Frank believes foam wrapped around tank prevented air getting gasoline contained Maybe what about air already tank would say Frank born under lucky star has subsequently mounted metal plate behind muffler has locked latters taching bolts 156 Model Aviation welT5 *OTHEES AleJO COLoeS F ininin C/L New R/C HANGAR rn CATALOG IKits OR Plans Innovative Inexpensive Quick&Easy Build HORNET 074 Order yours today QUICK & LIVELY SPORT BIPLARE GREAT FOR SMALL FSELIlS Designed new Cnn 074 Queen See enganel SEND 2 Spenificatinona Wing Spurn 2h Oang Area 275 Sq Length 25 Loading 13 SzSq Pt Weoght 1112 Lb Radio iChannel micro servos Experience aileron trainer qoalofoes yoo tn pilot sleek nk inn airplane Sisple dorahie rentangular 2spar hd noons sheeted box type 0 oselage solid tail surfaces pretot aAA balsa ply tollsize illostrated plana STANGEL ENTERPRISES ostb tooplete instroc non ha dna e pa baghtP 0 BC 36 M MEMBER0 AC LPlunn S4995 01350 ShlI Plan ySSe 95 $150 SSHWAUKESHA WSCONON5 bAMJ tively uncommon sizes /32 hard alu minum sheet landing gear stock small 00-90 0-80 hex screws nuts small 00 1 2 wood screws practi cally everything else available hobby shop worry can ordered National Trea sure Scratch Builders Sig Manufactur ing Company Youll also need small nut-drivers screwdrivers use 21-piece tool set sold Polks Model Craft Hobbies Micro-Mark shown ads fine little tools Scale model builders very reasonable price Whether sound Longsters model four-cycle engine conjures memories favorite full-size airplanes have known flownor merely sounds like model four-cycle enginewith its steady flying habits hybrid lightplane/antique sure please Just remem ber winds blow Longster better go Radio Technique/Myers Continued page 39 jects 23-channel problem AND two adjacent-channel problems exist wideband 5C455 receiver Thats Bob Aberle chose identify dual-conversion narrow-band receiver 1991 receiver Note above refers AM FM Theres no difference between far interference type concerned Larry Sribnick has done again Larry friend firm SR Batteries Inc Box 287 Bellport NY 11713 phone 516/2860079 FAX 516/286-0901 now marketing tool kit consists screwdriver-type han dle ratchet handle assortment /a-in hex-shaft tool bits will also fit electric screwdriver whole shebang comes snaplocked bright yellow plastic case sells $2695 plus $3 shipping handling tool bits fit No 1 2 Phillips-head screws /l6 slotted screws 12 sizes English hex keys 050 through 5/lb six sizes metric hex keys 15mm through 5mm adapter Ia-in square-drive sockets components hardened blackened resist rust except ratchet handle stainless steel screw driver handle plastic tool bits have spring-loaded balls lock place An added setscrew socket screwdriver handle insures wont losing tool bits inside model per feet item tool kit can handle things like wheel collars engine mount bolts etc got set immdediately filed two tabs off screwdriver shaft can slip ratchet handle thereon case need give lit tle extra urge stuck screws Should happen damage tool bit replacements available $1 SR Batteries RC Battle/Good Continued page 45 approved five new 72 MHz channels close 3-to-2 decision two Commission ers absent disconcerting dissenting Commissioners opined RC pears essentially triv ial use does warrant allocation spectrum space Caustic words hairbreadth voting coupled disparaging minority opinion might have undercut optimism about course future battles FCC except Courtneys shrewd analysis counsel explained Commissioners votes di vided sharply according respective years service three favor AMA proposal served 12 15 21 years respectively two voted against three years respective tenure caution ary experience Courtneys view confirmed importance continu ally educating public officials about RC hobby would well heed re minder RC Old-Timers/Mathews Continued page 49 original ignition wiring remained consisted mid-Thirties-type automotive acces sory wire totally deteriorated insulation cracked touch re placed unique double-pole double-throw knife-blade switch disassembled cleaned corrosion buffed installed although its used its original location Although laminated balsa wheels re moved sanded tire area repainted THE LEADER IN COMPETITION NEW 4[L#L SERIES 100 THP DESIGN \ /DIAPRICE 15 16 NEW PRO SERIES 3 \ / i S NEW NIGH TECH AIRFOIL SECTION 10T0200/oINCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 6334568 645667 9456677/ 104566A7 106W6W 106EW 114677 7 7 46 ii5W ii6EW 1167 124W 12SW 1256 1356 1456 1556 164/N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 75N 5/N 6I 67/,78 SERIES 400C 9777Io W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP 66 77 /6 677 6 677 8 67 676 June 1989 157