NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.
Edition: Model Aviation - 1984/08
Page Numbers: 26, 27, 28, 29, 30, 31, 32, 33, 34, 136, 137, 140
NO OCR TEXT NO OCR TEXT what Elf really looks like Just safe side though ordered couple sets plans Old-Timers already familiar envelope arrived several weeks later pleasantly surprised Elf pretty cabin biplane 39-in upper wing shorter lower wing la Waco Its tail feathers channel flier Cox Golden Bee 049 7-3 prop would run about 3 mm attain several hun dred feet altitude good flight After engine quit Elf real floater biplane An occasion al thermal would noticeably slow its descent couple years later installed Cox 09 some small Ace digitalproportional equipment two-channel rudder elevator control turned Elf hot little bomb would loop rollbut could no longer float around big lazy circles due weight addi tional equipment point clear Elf bigger fly well multichannel radio equipment set out larger version completely redrawing plans settled 60-in span up per wing began compute important dimensions Through out re-design process continuous effort made keep structure light engine 29 35 range could used still retain easy Old-Timer flight character istics installed OS 30 regular Old-Timer fare its nose like Rearwin promptly forgot about old standby plans ordered began rework plans RC modern glow engine 39 just about right 049 engine some Ace rudder-only pulse equip ment sitting shelf Elf turned out great single- has entirely adequate Left The radio area seen top fuselage servos mounted extreme rear help balancing battery pack sits 3/32 ply floor front servos receiver rubberbanded another ply plate beneath servos rear end fuel tank can seen left Right aileron servo note wheel has drilled differential actionmore up down movement Left This shows strut mount before modified worked okay number flights strut eventually felt out during rather tight maneuver After 1/16-in pins added hold shown plans Right landing gear attached 4-40 bolts Brass tabs wrapped around 1/8-in music wire landing gear soldered crossover wires act shock absorbers 28 Model Aviation pieces have bean built everything has bean sended smooth its now ready covering structure beautiful youll certainly want translucent covering HANK CLARK WNEEIIY SAYS JASSALi-r& ii RIGMT NIOW a&rI YUW LATE TIIIS 5TPY B-3 DAZE F MUC4 WRJOSURRWG-ONE RdUTE IMYUTTLa PILOT FLEW ThE COOPWHEN GOOPyOU6O0OFSAILI4G RUF DMNGKNOW WELLMAD ATM- WANTS ThRU GIRLS WHATS THE POOR EXCLJSCALYSO 5NCffJ-YURE OFI1M BUSY- YOUE 5U5Y-MUCb4O THISTRIP-AS F uLor--YOL W4NT MOQE-- ~wiTWE MOOKART- NOflME RCEBNAS-THE FALCON MODEL SrrS ____ I4FTA DOAHAFR / 3/6 SQ SPRUCE THRU STAB INTO BLOCK 1A6 X 3/B RIBS 3/I 6 SI-EET FRAMING 3/I6SO BALSA R85 3A6X 3/B ST AND RUDDER LE 3/BSQ SPARS 7/ IiSSQ I-lARD 2 I/8 DOWEL STAB MOUNTS 311/16 PLYWOOD CABIN OUT WINDOWS II I/16SHEET C/S CONER TAIL WHEELON /16 M WPRE THRU BRASS BRAaET INTO RUDDER 3/16 50 SPRUCE LONGERONS AND FIES I/B SQ S1INGERS SIDES lOP BOTTOM AILCCtJTROL INTO SERVO IN WING C/S 3/I6X /2 AILERON SPARS I/4XIBALSrE 3/BBALSA COWL 7 /4 I/I6 PLY29 -35 ENGINE 3 I/B SHEET 1/4 PIY FROM Fl FIREWALLI/B PLUS 3/163/16 PLYWOOD WING SADDLE LG MOUNi TOTE WING PLYWOOD 4-40 BOLT IIET GEAR 1/2 SHEI/BSHEET~ H BLIND NUT ATTACH INSIDE PANEL I/I6PtY\OD REINF ALL MAIN SPARS TOP AND BOTTOM WING I/B MJSIC WIRE GEAR 2 3/4 DU BRO WHEELS LAB SHEET LAMINATES WITH 3/32 PLYVD AND WIRE PEGS I/4SHEET ALL r1PS 3/32 SHEET ALL RIBS WITH VENT HOLES 3/BX I/2BALSA L EDGES Left Note 1/8-in wood dowel helps retain cowl muffler easy make K&S brass stock performs well Enclosure muffler cowl preserves clean lines fuselage Right spinner 2-in made Fox 104 Zinger prop pulls Elf Senior around nicely Notice area just ahead red stripe epoxy overlaps Monoote covering 5-lb model Probably good Schnuerle type 25 would also job stay away anything larger 40 Elf doesnt need lot power fly well Youve probably noticed already Old-Timer has ailerons Because its semi-scale appearance felt ail erons would detract planes good looks certainly improve its handling opposed typical wallowing-about three-channel style conservative Old-Timer enthu siasts model could flown three channel increasing rudder fin sizes amount dihedral wings have suggested some three channel dihedral figures plans Construction Before beginning study plans thoroughly acquaint self subassembly Construc tion techniques typical OldTimers However beware two im portant points First dont omit 3/32 plywood front top wing dowel mount extends top cabin right down plywood landing gear mount Second note 1/8 sheet balsa wedge between fuselage stabilizer give positive incidence stab Also note stab se cured three dowels Wings Begin cutting out parts will need complete construction No 2 rib common make two 1/16 plywood templates sandwich No 2 ribs between gang-sand balsa ones finished dimensions No 2 ribs still assembled stack cut out notches spars cut off tails aileron spar going build model ailerons suggest include aileron spar think may want add future Cut out Rib Nos 1 3 4 wing tip parts Assemble spars aileron spar should firm hard 1/2 x 3/16 balsa tips tapered after assembly wing panels front spars sawn -in plank knotless Left tail wheel mount soldered brass stock tnas Taslenea plywooa wtn screws i ne controi norns aiso muuniea piywood Right Three 1/8-in dowels help secure stabilizer fuselage leading edge vertical fin spruce making strong attach ment point 3/16 balsa piece fuselage Elf logo fin done Pactra Formula-U two squares Monoote trim 30 Model Aviation I/B BALSA INSTRUMENT PANEL F- 2 TRIAL FIT BEFORE CUTTING DOWEL NOTCHES / GLUE TABSWIN OS H IE LO I/IA BALSA LINING I/B BALSA SHEET SIDES S I/IAo 3/16 BALSA SPACERS BETWEEN 3/IA SO SPRUCE FRAME WORE AND WINDOW FRAME /4 OD BRASS TUBING TI/33PLYWOOD II OSOBRASSIII SHEETIII I I I ADJUST MANIFOLD OPENING TO FITCABIN WINDOW FRAME TEMPLATE YOUR ENGINE MUFFLER I/IA BALSA SHEET LINING1/4 TOP 3/IA SO SPR REAR WING I/B SD SPRUCEWING SADDLE TO HERETOP DOWEL STRINGER 1/4 OVERLAP WINDOWMAKE CUTS MATERIALAT CURVES WINDOW FRAME FOLD OVER AND SEALONMONOKOTE COVERING INSIDE COVERING WINDOW FRAME 1/4 BOTTOM REAR WING DOWEL UT LS PLYWOOD WINDOW FRAMEI/IA BALSA WINDOW I/IA BALSA BASIC FUSELAGE FRAMEWORK LONGERON3/IA SO 3/IA PLYWOOD TAIL WHEEL MOUNT I/BSO SPRUCE I/B 50 SPRUCE STRINGERS STRINGERS USE SAME SPACING FOR BOTTOM STRINGERS DOWEL FOR SECURINGI II/B BALSA LOWER COWL F-21 [111CRORSPIECE__________________________________________________ bID AR EXIT I/IA BALSA SHT EXHAUST PIPE OVER FUEL TANKOPENING BOTTOM3/IA GUSSETSFUSELAGE TOP VIEW1/4 CROSS GRAIN BET F-I S F-S OF COWL______________________________________ OMITTED FOR HEET FUSE BOTI CLARITY BALSAI/IA BALGA CENTER1/4 BALSA SHEET STRINGERSWING SHEETING 1/4 3/IACROSS DRAINED 2FOXBALSA3/ 2PLY ENGINE,I/RRALSA SHEET COWL SEPARATE LINEIlANE OINSIDE LINING TOP HALF GLUED TO- AREF-I TO HERE F-I WITH I/B DOWELS-RAYT BOT HALF RETAINED B 4-40 BOLT-- t I SO AIR EXITS BOTH4 4G DLT DOUBLER TO HERE SIDE SIDES B BOTOMB BLIND NUTFUSELAGEVIEW1/4 BALSA ~H3/32 PLYSHEETCROSS 3/IA BALSA CROSS GRAI0 5 BFLOOR 1/2 3/IA PLY BAR3/IA PLF-I/B MUSIC WIREI/B BALSA LAMINATED TO S/IA TO MOUNT COL G MOUNTBALSA SADDLE INSIDE 3/Bo 1/4 PLY GLUED INTO INSIDE 1/4TOP VIEW WHEEL PANT BALSA LAMINATION MOUNT FOR1/4 BALSA WHEELPANTS USE TWO 4-40 BOLT__________________________ UT BLIND NUTS MOUNTED IN PLY 2 BALSA_________________ STRIP TO SECURE WHEELPANTS TO______________________ AND BIND WITH COPPERILANDING GEAR WIRE SOLDER TOLD SLOT INSIDE ONLY 25/4OU-BRO -3/IA BALSA 1/2 BALSA 1/4 BALSAWHEELSLOT INSIDE ONLY WELLFOR AXLE 3/IA BALSA SHEET SUGGESTED FIN AND RUDDER SIZE FOR 3 CHANNEL OPERATION 3/B S/IA BALSAI\HINGE POINT 3/IA SOI I/BSO SPRUCESPRUCE L F EXIT GUIDESHORN MOUNT I/IA M W SOLDERED TO BRASS TUBE 3/IA PLYI/A PLYSOLDEB WASHER BUTT STRINGERS3/4 DIG TAILWHEEL 3/IA SD BALSA 3/IA SOCROSS PIECES SPRUCETOPABOTTOM I/B SO SPRUCE STRINGERS 13 ACROSS BOT B TOPI o~SOLDERED ---BRASS SHEET 2 BRASS TUBE TAILWHEEL BRACKET 0I2345A MODEL AVIATION GENERAL NOTES ORIG DESIGN BY FRANK EHLING 1937 WING SPAN AO/45ELF BIPLANE- SENIOR TOTAL AREA 820 50 IN FUSELAGE LENGTH 44REDESIGN 8 DRAWING BY GARY BROWN WEIGHT 5 LBS ENGINE 28 TO 40 ACING BY 30E DEMARCO CHANNELS 4 AS DESIGNED T OF 2 3 OPTIONAL C I et N m z C, w m C, m m -u m 1/4 PLYWOOD F-I FIREWALL Left All pieces ready covering point everything should carefully smoothly sanded Right Note 3/32 ply mount front top wing Vertical-grain sheeting inside cabin provides strength firmly mounting radio equipment Left The landing gear fastened 3/16 plywood 4-40 bolts through brass mounting tabs method allows convenient removal gear repairs needed Right Ailerons activated torque rods installed picture taken Main spar 3/16 pine Holes ribs help equalize pressure inside outside wing within rib bays Lert Cowl held two wood dowels 4-40 bolt through bottom firewall Cut generous-sized cooling holes cowl Right can see stab-mounting dowels sticking up Also note taper 1/8 sheet platform gives stab 2 deg positive incidence straight-grained pine thickness 3/16 rear spar 3/16 x spruce commonly available hobby shops Please note tips spars need tapered last No 2 rib tip before wing assembly begins right left wing panels can now assembled exclusive ailerons trailing edge will added later Finish wing assembly joining panels 1/16 plywood dihedral braces add remaining center section No 1 ribs trailing edge last step wing construc tion sheet center sections both wings 1/16 balsa After wings completed wouldnt hurt twist about 1/4 3/8 washout tips have covered Monoote some other iron-on will simple Just reheat material near tips twist tips correct direction raise trailing edge Make sure get equal amounts washout opposite tips otherwise youll correcting aileron trim ailerons assembled indepen dent wing over plans actuated via torque rods dont have appropriate power tools cut 3/16 x 3/4 pine main spar alternate can easily made Laminate 3/8 x 3/16 balsa strip between two 3/16 sq spruce pieces 32 Model Aviation 1/4 BALSA SHEET 7 7 TIP RIB FOR ALL RIBS ARE 3/32 BALSALOWER WING 4 / / 3 SPLICE JOINT AT LAST S 3/HS 3/16RIB FOR TIP BALSA7 TAPER 3/IA ALTERNATh MAIN PA CONSTRUCTION 7N 77_____ 41/4 BALSASHEET- GE POINT / 3 RIB FOR LOWER WING3/IA 5 3/4 PINE MAIN SPAR S S 1/16 PLY DIHED BRACES WING PLAN TOP S ///451 BALSA1/16 PLY11/ BOTTOM WING3/IA BALSA TRAILING EDGEGUSSETS TIP OUTLI NE 3/IA 1/2 PINE OR SPRUCE REARTORDUE ROD AlL CONTROL SPAR-3/3D MW 4 3/3D 10 TUBE 3/32 10 TUBE VIEW 2 I/IA PLY DIHED BRACE 1/ I/IA BALSA CENTER SECTION SHEETING TOP AND BOTTOM AILERON SERVO / /1 / 1/16 PLY DIHED BRACE 3/16 BALSA GUSSETS 1/4 Ii4B-L4%NSS 3-LSA WASHERS WOOD SPACERI/B MUSICWRAP WITH 64 HACKSAWAROWOODBLADES/B PECE EQUAL TO TOTALWIRERUBBER BAND FOR HTHICKNESS OPSHOCK ACTIONCU OUT ON BLADES~QJ~\\SAND OFF CORNER/ON 332 ONE I/B AOTCHINS TOOL//S2\\AFTER SLUNG RB/7 PER SDE SOLDER 3/64 MUSIC WIRECOTTER KE1LOWER W NG S RUT N PLACE GEAR WASHERS RB 4 BIND THESEI/B ID BRASS TUBEVENT HOLES ALL RIBS JOINTS WITHSOLDER TO MW AXLERIB FINE COPPERAND INSIDE WAS HERTOP WING STRUT WIREBSOLDERRETAIN WHEEL WITH OUTSIDE WASHER BMOUNT COTTER KEY IF SERVO ARMS OR WHEELSRIB ___SA ARE NOT AVAILABLEREDRILLNOTE ACTUAL WHEEL AS SHOWN 33 FROMLENGTH OF RIB TOTYPICAL AILERON SECTION STANDARD HOLES BEND PUSH- DOTTED LINES TO AILERONRODS TO CLEAR SHAFTALLOW FOR CUTS INNOTE ALL RIBS ARE 3/32 BAL SERVOI/IA BALSA SlEETLE TE AND AILERON TOP BOTTOMSPAR CROSS-GRAIN fop OM TTED FOR CLARITYI/A DOWELS TO MOUNT STAB I/IAS 3/B..........1 TO FUSELAGE BALSA RIBS TO ORDUE__ RODSB SO HG BA GA--ED —..I/4SO BALSA _ wj SPARS TOP ALEADING EDGE BO TOM 3/B SO BALSA 4 BALSA SHEET /STABILIZER____________ ____ ____ I/IA MUSIC WIRE OR WELDING ROD EPOXY NIN PLACE \ OIEJARAEE LEFT B ONE RIGHT I/B BALSA VERY GRAIN I/IA BALSA\\\ CROSS GRAIN NOTE ANGLE OF STRUT MOUNT TE CURVE TO FiT AIRFOIL WING STRUTS SECONDARY SPAR BRACE USE ON MAIN SPAR AND SECONDARY SPAR USE ON LEADING EDGE 1/4 ~jILERON SPARSHEET I/I6~ PLYWOOD /HINGE POINT DIHEDRAL BRACES yR ODWEL ~1 LW BALSA 7 GUSSETS L-d 3/B SO3/BIN V4RALSA BALSAPLY.. -r I/B MW -JOINER 3/4 BALSA T E STOCKNOTCH FOR3/B 1/4 BALSA RIB ENDS 0I5345A 3/B 5 1/2 BALSA LEADING EDGE 3/35 BALSA RIBS S STRUT MNT LOWER WING S STRUT MNT UPPER WING A 3/32 BALSA -D S/IA BALSA WING DRAL I/IA PLY LOWER WING TIP OUTLINE I TOP WINO ZI2 I NOITOM WINGj V8 i-to BOTTOM WING TO HERE SAME TIP PIECES AS TOP WING-NO AILERI5NS ON ROT WING N 2 34 vi 7 1/4 BALSA SHEET TIP PIECES LAST STIP TAPER MAIN SPAR 1/4 5 IRIB BALSA YE34 7 NOTE NOTCH SPARS INTO V4 WINS TIPS \ 1/4 BALSA SHEET N7 TAPER SPARS ELEVATORFROM TIP RIB TO I/4AT TIP ~-77 L4 BALSA ______________ SHEET 3/4 BALSA TESYOCK CENTER SECT7 RIBSTYPICAL STAB SECTION CONTROL SURFACE MOVEMENTS AILERONS I/4DN 7/IA UP ELEVATOR 3/4 UP B DOWN RUDDER LEFT RIGHT M EL AVIATION ELF BIPLANE-SENIOR REDESIGN B DRAWING BY GARY BROWN TRACING BY RCO TB 20F2 1 C I N m -o z w m m m -v m -a NJ 17 _- Lelt i nls s another view tail wheel mounting shown color pictures bracket mounted two layers ply woodone 3/16 piece between two fuselage longerons other 1/8 piece top longerons also meets 1/8 spruce stringers Right leading edge stab 3/16 sq spruce firmly cemented 3/16 balsa piece mounted between top two longerons Left The stab elevator fin rudder simple structures built directly over plan ply mounting strip wheel pants shows clearly the right inner side Right strut mounts simply doubled-up balsa pieces slot cut middle piece splice joint will need cut top spruce piece spar begins taper last No 2 rib notches ribs lead ing edge aileron spar cut tool sketched plans quite simply two pieces wood sandwich two three hacksaw blades together width depth notch adjusted adding subtract ing blades varying depth Use spacer behind blades keep two pieces wood parallel Before covering wings like wrap trailing edge dihedral joints center section patch fiber glass cloth couple coats epoxy cement will strengthen joint protect thin wood against rubberb ands Fuselage two side frames built up 3/16 sq spruce balsa joined together Cut out bottom wing saddles 3/16 sheet pin over plans Next assemble 3/16 sq framework side noting longerons 3/16 sq spruce After first side cement dry leave plans assemble second side directly top first done laminate 1/8 balsa wing saddle doublers ride fuselage side Note 1/8 doub ler extends front landing gear mount Join fuselage sides wing trailing edges top bottom balsa plates sure sides parallel forward two points After thoroughly dry cement 3/16 plywood landing gear mount Glue 3/32 plywood front wing dowel supports place Note ex tend full height cabin Pay careful attention gluing technique carry quite load simultaneously lend lot strength cabin area Add 3/16 sq cross member top front cabin 1/8-in cabin top plate point tail end fuse lage may clamped together temporar ily 3/16 sq balsa cross members added wing trailing edge rearward step com pleted glue tail end fuse lage sides together proceed nose finish fuselage framing First glue ood firewall line fuselage inside verticalgrain 1/16 balsa firewall back trailing edge top wing Mount engine determine tank position glue fuel tank floor Finish fuselage sheeting adding 1/8 balsa sheets sides just aft firewall 1/16 balsa sheets top nose section fuselage framing completed adding 1/8 sq spruce stringers top sides bottomand plywood window frames pushrod exits wing dowels added after fuselage covered exposed ends can fuelproofed polyester resin epoxy cowling constructed 3/8 sheet balsa lightly glued fire wall over mounted engine Cement 1/16 plywood spinner ring quickly mount spinner engine properly align ring rear spinner Now carve roughly shape cowling step done carefully break cowling off firewall carve out inside much possible lighten gener ously cut cooling needle valve holes Once cowling fine-sanded its finished shape inside out cut upper part lower part permanently glue upper section firewall use three 1/8-in wood dowels added holding power Use Continued page 136 34 kArr4eil Avitinn TIGER TAIL 4 Ron Chidgeys latest series little larger lighter slower retains honest flight character tistics its predecessors Especially recommended sportsman ad vanced pattern also good choice turn-around pattern Plans construction hints $995 WELLER 3 BLADE PROP very stiff molded fiberglas propellor Eniand Its efficient design allows substantial reduction noise level actually improving per formance -$2000 NEW CLAMP IT FOREVER STAINLESS STEEL PIPE CLAMPS Lighf strong Low-profile selflocking 3116 width wont cut silicone couplers Pkg 4 clamps $295 EltIBrow Continued page 34 glass cloth polyester resin side cowling strength have favorite method attaching cowls use method using bolt two wood dowels shown plans simple has worked out problems Wing struts purely optional support load Build struts last after model com pletely finished Slight variations di iiensions wing saddle cushion thick ness may require struts slightly longer shorter shown plans Measure finished wing gap carefully make cardboard template front plans figure exact length struts should Also make sure fit snuggly between wings loose fit will practically guarantee vi bration Notice cross-graining balsa strut laminations before cutting NEW Sleeve Puller -$795 Bearing Puller $695 NEW 1 dia aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing-structure 2024 alum tube 24 long socket 12 long S89SIset ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily damage Cone cone eapanding brass ring grips sleeve bearing 10 new 60s 17MM rear bearing * Special * Both $1395 See Dealer Order Direct Include 75 Per Item UPS GP Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 904 476-8639 out pieces important factor con tributing strength Once struts finish-sanded proper length rubberband wings fuselage align perfectly other Next determine ex act location strut 3/32 plywood mounting block pin epoxy securely end strut struts finished yellow epoxy paint match cowl wheel pants Tail seCtion stabilizer elevator constructed over plans Sand taper leading edge ribs shape eading edge Note center section stab covered 1/16 sheet fin rudder also built over plans Note spruce leading edge fin Since model could also flown three channels rudder ele vator engine have drawn slight ly enlarged fin rudder ensure good controL Also note increased wing dihedral angles three-channel use wheel pants course option al dont take long build add lot 'golden age~ flavor model consist laminations balsa strip plywood mounting purposes Cut out center laminations allow about 1/8 around circumference wheel middle 3/16-in lami nation can varied allow thickness different wheels Du-Bro wheels fit pants designed Before carving sanding add ood mounting bar inside pant shown 4-40 screw blind nut either side axle mounts wheel pant landing gear mounted careful pants dont bind wheels landing gear made 1/8-in music wire 3/64-in music wire crossover shock absorbers Cut four small brass tabs solder land ing gear shown use 4-40 bolts blind nuts mounting fuse lage wheels like solder brass tubing axle retain wheel washer cotter key sure bend little toe-in axle better ground handling good solder joint clean parts soldered emery cloth fine sandpaper until shiny Put drop acid-type flux heat parts gun iron until solder will melt touched Allow solder flow base metal Remember never use acid-type flux acid-core solder electrical wires due its corrosive effects Covering Since model rather light ly loaded uses very strong wing spars may use just about cover ing method material desire ex cept no burlap house paint model uses combination transpar ent MonoKote epoxy paint will notice photos wheel pants struts nose area cowling Aug 11-12 Sea Plane FUNFLY Events Call write details BALSA USA PO Box 164 Marinette WI 54143 906-863-6421 136 Model Aviation WING TUBE & SOCKETS NEW GLOW iirebclll PLUGS NEW IMPROVED High Performance Glow Element Blow Proof Seal Six Types 3 Heat Ranges Longer Life Only $129 Swanson71 Associate PO Box 1Since 1948 Wayne NJ 07470 ATTENTION OPS Engines & Parts Available Racing Marine Use OPS 1 ter Midget OPS 45 Marine PLUS Custom TD 049/051 engine parts Complete inventory stock custom parts COX TD 049/051 engines complete Intormation send $1 P & G Metal Products 301 North Yale Drive Garand TX 75042 Gene Hempel214 272-5210 after 600 PMJ Al Featuring fast service qualified people latest equipment including SPECTRUM ANALYZER AM FM SIGNAL GENERATOR Call Steve helms Tony Stilman custom work competition needs stock complete hobby line specializing competition accessoriesall discounted prices Steve Helms RADIO SOUTH AUTHORIZED SERVICE CENTER FOR Kruft Systems Futaba PCMJR Unlimited 8 108 E Burgess Rd Pensacola FL 32503 904478-6745 AFutaba Distributor er Inquiries Welcome * opaque yellow parts finished epoxy paint wheel pants cowling filled balsa two coats polyester resin sanding after coat applied three coats K&B Superpoxy yellow per structions gave terrific finish nose area firewall much fuel oil also used Superpoxy keep MonoKote sealed First treat bare wood inside out side nose area two coats polyester resin fuel proofing same areas dont need paint such tank floor back side firewall Sand area polyester resin applied will finished either paint Monoote Next cover fuselage Mono Kote within inch fire wall except top bottom Carefully sand No 60-grit paper MonoKote will over lap paint MonoKote sur face dull rough epoxy will stick quite well leaving nose area nicely fuel-proofed MonoKoting fuselage cover right over side window frames cut MonoKote out windows leaving about -in margin mar gin will folded over sealed down inside plywood window frame Cut -in margin Mono Kote diagonally curves frames order get neat fold-over Once MonoKote has sealed down inside frame glue windows place inside frame Radio installation Assuming build according plans use engine average weight model will probably nose-heavy Start radio installation mounting ser vos far rear cabin possible far make ac cess difficult Install engine fuel tank wheels etc move battery receiver properly locate bal ance point installed 3/32 plywood floors shown attach receiver battery rubberbands Simply placing radio equipment under fuel tank will probably result noseheavy condition Set up control surface throws shown plans Note have used differential throw ailerons can find servo arm wheel made differential ac tion youre set just redrill servo wheel shown plans wrn also need bend pushiods clear servo shaft Muffler Elf homemade affair K&S brass stock Its total enclosure within cowl preserves clean lines nose keeps oil underneath model correct tools materials custom mufflers model difficult make Just remember make too restrictive assemble muffler once have cut trial-fitted parts use 30% silver solder Bernz-O Matic type propane torch solder parts together As type metal joining clean two pieces joined use correct type flux After cleaning joint area fine sandpaper until shines apply thin coat silver solder flux begin heat torch Sheet metal heats Continued page 140 HOBYI-IT5EAWAYHOBBYHIDEAWAYIIOBBYHIDEAWAYHO8aYHIDEAWAY FAMOUS BRITISH DIESELS AEROMODELLER SPARES M/E PAW D/C 3rd PRINTING CATALOG-DIESEL HANDBOOK pp HOBBY HIDEWAYDELAVANIL 309 244-7389 61734 HO BRYN DE AWAYIlO BRYIIIDE AWAYHO BRYIlIOt AWAYHO B BYN ID EAW ZiL P0 Box 2790 IPark Falls WI 54552 UProudly PresentsU 15 SCALE RADIO COP 62 SPAN NGINE . IC First Series Great Flying Canards RIC Modeler TAYLORCRAFT GIANT SCALE 90 WINGSPAN 4CYCLE75-90 SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST PO Box 566 Auburn WA 98071 206 941-8248 August1984 137 Now Kit Form ElflBrown Continued page 137 quickly apply solder should melt flat puddle around joint solder forms little ball base metal material either 1 hot enough 2 clean enough 3 fluxed Practice piece scrap brass first will pick up knack quickly After solder job complete chip away encrusted flux rinse thoroughly water Du-Bro muffler strap workswell attaching muffler engine havent convinced try build ing own muffler Du-Bro Muff-l Aire II should work well little modification cowling Flying First few words about upside down engines Inverted engines harder start upright ones providing flip model belly-up start easiest way cradle Robart makes $11995 wIth large lInear servos $12995 wIth small rotary servos Seed SS fer complete cetmlog 509 487-2122 nice Styrofoam can build few pine boards short time youre careful prim ing can get inverted engine start regularly turning model upside down Just careful using electric starter engine does get hydraulic lock too much fuel prime resulting bent rod topic running inverted engines experience have never found inboard batteries necessary desirable keep glow plug lit idle Provided carburetor adjust ed correctly fuel tank placed properly engine will idle just well inverted upright minus side onboard plug lighter just adds weight potential fire hazard should something chort-circuit After youve adjusted engine idle made sure surface throws set correctly its time first flight takeoff prepared correct heading little right rudder Give full throttle short distance will lift off little up-elevator Once air climb safe altitude acquaint yourself its handling char acteristics Since theres lot wing area move about youll notice reacts very gently aileron control Co ordination rudder neces sary because aileron differential will snap things up quite bit landing dont afraid slow down Elf ready again use little rudder pull tail down touch up-elevator once begins slow ground enjoy Old-Timers cabin 6planes try Elf may never sweep SAM Championships like Old-Timers its loads fun fly Radio TechniquelMyers Continued page 37 youre using doesnt make sound unless transmitter operating Yicinity could put LED light-emitting diode pilot light would use battery cur rent wand does OK gang make up use Let John Lange know much appre ciate generosity writing him 1700 N 37th Ave Stone Park IL 60165 Toledo year met talked John Blue Thunder Simone photod Eagle Helicopter soon production wings enhance maneuverability John ex pects able perform whole new series aerobatics cant wait see time Helicopter wins aPat tern event Wholl first Several elaborate expeasive new RC sys tems shown Toledo Altech Simprop represented Hanno Ptett ner Miniature Aircraft Supply Co Multiplex being imported Walt Schoonard Futabas PM digi tal pulse-code modulation system So far Ive handled done testing Futaba PCM showed outstanding performance spite fact receiver single140 Model Aviation Save easy assemble 4 channel kit expandable 71 OnIy$ 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Y Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled fdr easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pock I600mAH ft 1200mAH extral Expandable Full Command Systems 908 E Rosewood Spokane WA 99208 [HOT WIRE FOAM CUTlER ATTENTION ORATCH UVILIERS cutting foam wings ats turtle decks ny model parts n made foam ts over 7 foot wing span Operotes 12 alt motor cycle battery tith instructions 9 dealer order drect MtestainAe4Di Hawk PO lox 221 Mt Morris 1148458 AC K VTACH/PULSE C MOS Technology 4 Digit TaoS 150 40000 RPM 000 RPM Optroat Pick-Up 4 Digit Pulemeter Alumicum Case Hold Drsplay Scoitch Tooc NI-Cd Battehes Cng Poise Cables 10010454 Tachonreta uses 441011 LEDI RPM Xt0 Only last digit dropped Special tiller easier read soetight POLO soAtoh holds display RPM no need bend goes prop read Batteries 040rnai4NtCdl does use receloen batteries power ton Poise teadlngs 0100k Anodized Aluminum oase rugged Poise input ole cable Inom radio rsueioec servooc puts Also leclodes solden solder lice end shrink lit br Caching mating cosneotors charger poise cables better product modeler ,eersre LNA H8N ELEcTRONIcS55scseuest h4Iosrrrcereounr 01cc55100 jjkjce.rcenrocnoae,oenult ftEse,te sen a- @*.