NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii
Edition: Model Aviation - 1984/02
Page Numbers: 28, 29, 30, 31, 32, 33, 34, 35, 36, 119, 122
NO OCR TEXT P-38 certainly eye-catcher view two OS 15s have synched shes ready takeoff many flights author has never experienced engine failure isnt tempted purposely have flameoutl Make sure engines running well before takeoff EVEN CASUAL acquaintances world fighter aircraft have little trouble con juring up image off beaten design-path bird 1937 distinctive lines P-38 evolved hands Lockheed designers Hall Hibbard Clarence Johnson answer Army specifications new high performance pursuit-fighter aircraft Lockheed won competition eventually earned contract build first XP-38 its features might take granted today remember year 1937 XP-38 quite radical design pause consider military just stepped out wirebraced-biplane era tricycle landing ger desirable feature made practical lack engine pod noticeable difference other planes Other notable features included twin Left Spinners backplate prop nut Note ridge base spinner cone fits backplate groove Spinners turned balsa coated fiberglass polyester resin details process text Right Homemade mufflers hobby shop sheet brass really work arent too tough put together OS 15s propped 8-4s Left Make sure square aileron torque tube lined up connected wing panels slid place Silicone rubber sealer used root keep out engine oil Note retaining hook music wire Right Aileron servo installation accessible via pod hatch retained 1/16-in wire pin rear hooks rubberband front Nose-wheel steering operated aileron servo February 1984 29 IU Left With radio access hatch covers removed see servos engine throttles U rudders elevator R hatches sealed silicone Servos mounted 1/8 ply trays Note aileron torque rods running through rear servo compartments Right Throttle servo us shown pulled halfway out ply tray 1/16 ply hatch covers hold servo trays place Study pictures will help construction Cradle authors P-38 made heavy corrugated cardboard curved foam blocks corners Its handy working underside model underside can see 4-oz Sul livan fuel tank held place rubberbands Depending upon tank used some wing sheeting may have cut away place correctly respect engineimportant satisfactory running Nyrod conduit control cable sanded Main landing gear mounting comes view flush neat exit Bar connecting rud forward hatch removed Brass straps ders 1/16-in music wire soft-soldered LG drilled mount _______________________________________ ing 4-40 screws blind nuts P-38 grabs some altitude after having made low pass high speed really good flier model must built lightly Ready-to-fly weight shouldnt exceed 414 lb UWH 1 HUKJ Q MA TrN wor U OLD aANDrrFJ NOH/THEYCAL C UNLOADED-NOW HAN SEZ YOU ~-EIST OPROw5P HE IN 3 MUSEUMS HIJACKEO HIS CAN HELP CrlF NASMOCMIELLflELD TAVELAE McOLX THEY GO AND AND AMA RES1VNV ~LEAVE THEIP HERE k AILERON RODS THRU TUBING INTO SO BRASS I1JBE AT WING JOINT K WIRE CLIP TO ANCHOR PAD IN C/S I/ SHEET BACKTOTE OS MAXJS ON TATONE ALUM MOUNT I/B PLYWOOD BEAMS P 3 TO REAR SPAR P 3 1/4 PLYWOOD 3/32 BALSA STRINGERS ALL POD 1lVVV IT4cNQCKWOOUVK P JUiT iEZYi//Th NC MY YEP CIlUCAS LYARPLNES 3/32 PLY DIHEDRALSIG 9 CLEAR CANOPY BRACE REARSRAR- 1/16 SHEET ALLiOP BO1TCti CENTER SECliON WIRE HINGESOPTIONALTO ADD T L WEIGHTTHRU STABILI ZER I1A6 WIRE EQJAUZER ON TABSYD RUCOERS I/BVX 3/16 RIBS 3/16 BALSA POST AND T EDGE U ELHN JNDERSLOTID CLEAR STABIUZER BALSA flP FRAMES 3/16X 3/s LESTAB BLOCK FAIRINGS I/B STRINGERS AFflJNO XM EXTEND AlL SPARAND- WEB TO BUTrRIB-AILERON RODSARE SOLEERED INSIDE SQUARE TUBING AT 3/I6X I/2AILSR 3/ISSO SPARS TOP AND BOlTOM 3/16 BALSA FORMED TIPS PS 3/IS X 3/B KEEL LOWERlO PS UPPER TOT E SOLID BLOCK NOSEX 2 NOSE I/BWIRETo P3 turbo-supercharged v-i 710 Allison liquidcooled engines swinging counter-rotating propellers cancel torque effect design also allowed aircrafts guns placed pod directly front pilot Early 1939 during attempt set new cross-country speed record break held Howard Hughes XP-38 crashed during landing flown little 12 hours However Army recognized good thing gave Lockheed order 13 aircraft designated YP-38 Thus beginning Army Air Corps commonly unique versatile fighter During war P-38 served num ber capacities addition fighter bomber escort duties successful photo reconnaissance aircraft job able employ its superior speed outrun threatening adversary end WW II 1946 saw reopening National Air Races Cleveland OH However never same prewar years Gone small home-built racers steel tube wood fabric place war sur plus fighters rapidly being out dated recent development jet engine Mustangs Corsairs Cobras other war birds dominated both closedcourse Thompson cross-country Bendix well other lesser races small number P-38 Light nings entered Nationals successful ones flown Tony LeVier aircraft subject arti cle LeVier very experienced pilot flew prewar postwar air races During war worked Lockheed test pilot gaining intimate knowledge aircraft Though lesser known famous P-38 aces Maj Richard Bong Maj Thomas McGuire LeVier could match skills controls P-38 LeViers P-38L somewhat refined its specialized task air racing superchargers trailing edge air intakes removed faired over additional gasoline capacity provided Some air racing achievements P-38L 1946 2nd place Thompson Trophy Race average speed 3702 mph 1947 5th place Thompson Trophy Race average speed 3575 mph 1947 1st place Sohio Trophy Race average speed 3609 mph Construction goal project produce lightweight twin engine fun Scale model eye appeal im portantly good flying characteristics order achieve model consists en tirely built-up construction During building process should make effort keep model light After com pletion original model though add equal amounts lead tail boom correct planes noseheaviness therefore although plans show built-up tail surfaces sheet wood could substituted no weight penalty Plan ready-to-fly weight no 4/2 lb careful should have no problems Wing halves joined -in od brass tubing front spar 6-in od rear spar brass tubing slips aluminum tubing same size id has epoxied between top bot tom spars front rear system has worked well no failures Aileron torque rods connect through wing joint via square brass tubing same id od measurements A-in od outboard wing panels Also outboard wing panels 3/M-in music wire hooks snap through hole 3A2 plywood plate mounted wing root hooks engaged released reaching through main landing gear openings screwdriver As twin use two identical en gines same manufacturer make sure both operate flawlessly Never attempt fly twin engine running less perfectly wing divided three partsthe center section two outboard panels Basically model built up around SIB B CL 1/16 BALSA 3/32 NOTCHESINST PANEL STRINGER 3/B 3/W BALSA~VIR SHEETING KEEL BADIBONEFORMER SE TA IL P-3P-A P3-P-I BALSA B0C6 NOSE -.RCVR B /RATT AREA3/32 BALSA STRINGER SEE SETAILFOR ALL POSITIONS 4 COT THIS SECTION SOT AFTER PiTTING FORMERS 2 SIA NOSENOSE SEAR SOON WHEELSlEET WARP WITH TO CONTOUR OF P00 DRY AND GOD FONME POD WITH I/B PLYW FUSELAGE POD 55 BALSA SPARS TOP A3/4 3/B BALSA BOTTTRILEADING EDGE B-IA13B-Il 1/N r-OR 1/Il BA NIl RINSE LOCATIONRIB 3/B I/A BALSA3/16 52 BALSA1/16 PLY TRAILING EDGESPARS TOP BETWEEN BOTTOMA NOT SPI FRONT SPAR 115/16 WINS FRONT VIP FRONT 3/32 PLY DIHEDRAL REAR 1/16 PLY DIHEDRAL center section front rear spar Accuracy alignment very important flight landing loads tied unit Before beginning construction of various subassemblies cut out Left Inboard area two wing panels shows mounting system Note square tube aileron torque rod connectors aluminum tubes epoxied between front rear spars Right Wood dowels tried initially joining wing panels discarded found removing joining panels sometimes difficult due humidity changes Substituting brass solved problem 32 Model Aviation FULL-SIZE PLANS AVAILABLE . SEE PAGE 164 I/IA BALSA COCHPIT SHEETING P-A P-V yR GO BALSA /P-JOLONGERON NOTE BALANCE ON FRONT WINS OPSA I/lA MW EPOXIES HERE HOLDS HEAR OF HATCH P-GA DRILL I/IA HOLE RADIO ACCESS RATCI COT OUT BEFORE SHEETING B ADS I/B SO BALSA STRINSERS TO EDGES ABS THEN SHEET TTPICAL WINO JOINT PANEL SCRAP BALSA VCSARB AR NT SPARSALAN TUMINA I/IA BALSA CENTER lINTSECTION SHEETING TOP SHEETING DRAITY FOR CLARITY RH-PLO H-BAI/ABALGAI VA IGHESRAL H-RBWES BALSA \I SPARS ID SO S GSj R-9R-G __ R-IO--VIA VERTICAL GRAIN -BALSA WEBS ____ R-I IR-6B0 R-12R7 -zsQ TTPOAL DIJTBOAHO R-14WINSTI PREOSCRE RELIEF WEES ALL RING VA PLYWOOD MS FUSELA2 POD IERVC L -l/1-~/ VIA BALIA L BEARING BRACE BALSA LEFT BOOMVA SO BALSA FILLEHSPARS-ROOT TD JOhNT V-11- II 2410 ALLEADAW TSRE216 BALSAEDGE SHE ETINS BOTH DIHEDRAL BRACES RUN BETWEEN RIBS 3 NOTE RIBS B-I THRA 0-S I/IA BAL FIT VEER ENABlE HIB H-HA I/B BALGA SAEARAOSq RIBS H-ER THRA H-IH I/IA BALSA PLATECATOIT USE SILVER SOLAERCZXVJ TO ENGINE RITA BRASS "vB IA STRAP B A-AR MALT t BRASS POD CBJTLINEBRASS MUFFLER 1/4 AL TOME EPOXY IN 4 H-S-S- -I II/HPL BATCH \JL LV t LY 1 MW VA BALSA GUSSET PLYWOOD DIHEDRAL BRACES R-I h11171flsHz R-2 -nj - LIZD R-3___ _VIA BALSA SHEETING R-4 TYPICAL CENTER 2 ARILL LR RWFOR TARNINA 3 CBM~ SILVER SAIRERALASS BALSA BLOCALABOR TO AHILL PERFECT- ROARA SAAPE LV NA VALETICS TARS FLYINGSPINNERLINE WITO GLASS CLOTH CONNECT WING WITH I/HOD B S/lAID BRAGS TGHINX VIEW H-BAR-7 HHAM--N 0/AID S2 JK ALUM SPARS2~-yR BALSA WINO IOINTGUSSET 7 ~-C NAINE OCTAAT PLY RING t~ VA PLY CARL MOSAIT \\70OW OH-HA MALTS TA -JCBECAME TO BLISA SAYS COWL HEAR VIEW DETAIL ENAINE ENGINE COWLING FROdT VIEW AM RAILS SIZE PARTS YR TA FIT TRAM DEBARS GRE parts gather together necessary com ponent materials Begin wing cutting out complete set ribs An alternate method sand wich balsa blanks Ribs 3 12 between plywood templates No 2 No 12 extra blank Rib 1 outside template No 2 slight spot glue between blank will keep sliding during sanding carving method will leave beveled edges ends rib need carefully sanded square have sanded accu rately will have produced very accu rate set ribs Start assembly gluing Ribs 3 4 5 NGE OCA ON GENERAL ROTES 4 CHANNEL RADIO WING SPAN 56 LENGTH SN-I/O WEIGHT HA-AR 02 TWO IS ENGINES LOCKHEED P-38 IUN SCALE R/C DESIGNED B DRAWN BY GARY E BROWN 1. TRACING BY JOE DEMARCO SHEET OF 2 6B top bottom front rear spars Next join left right center sections plywood dihedral braces Add Ribs 1 2 leading trailing edges complete center section frame work outboard panels built typical symmetrical-rib fashion Assemble ribs OR 2AI& Left Author used built-up tail feathers prototype came out nose-heavy hindsight told him could have used sheet balsa weight penalty Right Skids bottom fins 1/8 plywood Scrap balsa used fillet control cable exits rear stringers February 1984 33 spars add leading trailing edges finally add wing tips Ailerons built separate units next important step join wings via brass tubing telescopes alu minum tubing epoxied between top bottom spars Cut shims space alu minum tubes evenly between spars important thing make sure alu minum tubes front rear spars perfectly parallel horizontal verti cal planes Join outboard panels center sec tion epoxy still wet brace tubes place assure exact align ment wing panels tubes course transportation large enough really no reason wing cannot built piece final step completing wing add plywood beams carry formers pod forward wing leading edge 3A6 plywood bulkhead will mount nose wheel sure incorporate 10 positive wing incidence adjusting beams 10 below center line airfoil epoxy securely ply wood dihedral braces After done center section can sheeted /6 balsa except radio hatches wing servo hatch covers cut /6 plywood held place four corner screws Booms Assemble 6-in keel back bone pieces over plans Mount Formers 6 through 10 firewall point wish may angle firewall out ward couple degrees resulting en gine out-thrust may help keep model under control one-engine-out situation However dont let technique ex cuse use not-so-reliable engine Glue stringers Formers 6 10 notch ends accept forward flush AG sheeting used sq spruce strin gers booms would now recom mend substitution balsa save ad ditional weight Now ready glue booms wing center section have cut out top keel boom correctly between Formers 2 6 will have curve duplicates top curve airfoil point booms attach Make sure booms parallel hori zontal vertical planes point sure adjust 10 positive incidence wing After booms joined wing add remaining form ers top bottom wing Drill landing gear mounting holes main gear Former 4 before gluing place Sheet booms A6 balsa ward Former 6 P-38 small fillets booms pod join wing fillets easily accomplished spackling compound Sig Epoxolite As can see photos have mounted engines horizontally can mounted way prefer Just sure maximum engine reliability mount fuel tanks centerlines just below needle valves car buretors Use epoxy polyester resin fuel-proof tank area firewall air intakes built up AG balsa pieces between boom stringers will provide gluing base intakes Add intakes after covering booms Pod As have seen support pod two plywood beams rooted front rear wing spar dihedral braces first step squarely cement Formers 3 4 5 plywood beams Add 6 balsa keel backbone Glue Formers 6 7 8 9 10 between keel wing center section glue Formers 1 2 Sheet pod /6 balsa Former P-S rearward above below wing center section Cut access hatch battery receiver aileron servo Finally add 3A2 stringers ahead Former P-S Notch sheeting greater strength Dont forget bolt nose wheel mount before adding stringers Add nose block last cockpit detailing wish Tail group rudders stabilizer built over plans usual way VIA BALSAINTAKE FORMERS SHEETING 3/IAI-I RALA- H F21-31-4 -4 2V1/IA BALSA kLEFT SIDE SHEETING- OMITTED FOR CLARITY 1-3 NOSE GEAA HULUREAGPz P73P-I-- TA 3/IA PLY - CARVED S FINN El -3/32 BALSA 1/16 BALSA p4 VIA PLY.U II/IA PLY 3/32 50p7 BALSA p4OSTEP P-S TO HERERATIO HATI NOTE NOT PlO-- -I/B SO BAL STRINGER I/IA BALSA77-----------I/IA BALS -I/IAP I/IA P1P-b P-GA TO HERE 3/32 BALSA- -3/32 BALSR POD FORMERS I/IA BALSAP73AI/H BALSA / WING CUTOUT WINS CUTOUT 1 3/IA PLYI/IA PLY S MOUNT PABOOM FaRMERS F- F-9 F-IC F-B F7 TO F-b USE 3/32 BALSA I/A PLY 2 model came out nose heavy built-up tail feathers could easily construct solid sheet surfaces saving little time gaining needed weight tail rudders coupled VI6-in music wire Left view similar color pictures servos being installed Right again hatches place pod hatch stringered prototype author now feels sheeting would preferable Slots booms two small blocks pod bottom landing gear doors Note switch mount pod 34 Model Aviation FULL-SIZE PLANS VAILABLE. SEE PAGE 164 ACOWLINSO ARE MADE UP OF3/IA BALSA 4 LAYERS OF I/O BALSAGREY AND ONE OF 3/B NOTCH TOP OF FUEL TANKCBUTCH FROMNOTE USE I/IA F-K FORWARD AREATO ALLOW FORBALSA SHEETING I/IA SHEETINGFROM P-I TO F-AFORM ROUNDED 3/IAGREET TO HEREUSE I/B BALSAFILLETS WITH GUSSETSTRINGERS FROMSCRAP BALSA RUF-A TO PIO 3/Ic BALSAFIN SIDE VIEWCRUTCH INSP-I F-SF-lU F-7 F-B -N 3/IABALSA GUSSET 3/IACE STER RIGHT-- GUSSETSSIDE STRINGER INTAKE POSITION -L SLEFT SIDE SHEETING AND DOORSSTRINGERS OMITTED FOR CLARITY NE ALUM H-2H-S DR MOUNTHATCHI/BMW /UBRCERIBS OEWHI/lA BALSA 7 ROOM SHEETINGI/I PLYSKAKYINS VISOEEP TOP OUTBDARD 1/16 PLY I/B BALSA HATCH FORMERSSTRINGER SHEETING JOINT AT F-A3/B 3IA ________BALSA SPARS HZH-SF-3F-2 2-1/2 MAIN TOP INBOARD BOOM SHEETINGWHEELS 7 CUT OBEETS OSEBSIZE SHAPE TO FIT 3/32 50 BALSA STRINGERS ELEVATOR PR p5 Y INSERT PDp ELES HORN MOUNT FUSELA E -P10 P00 3/16 BALSA SHEET HINGE P01ST 3/IA I/H BALSA ORTIONAL 316 BALSA SHEET TAIL SURFACES RUCMAY BE SUBSTITUTED COT OUT FOB ELEVATOR ~-A/R PLY STIFFENER 3/IAPLY-HORN MOUNT RUDDER BAR BRASS TAB HINGE P01ST NOTE HATCH HOLD DOWNS-MAKE SMALL HOOKS FROM LIGHT MUSIC WIRE B EPOGY INTO EACH HATCH DOOR YOU ANG BOOMS ONLY ALSO EPOGY SMALL AClOAS INSIDE OF BOTH BOOMS AND THE POD USE SMALL TO FASTEN WITH ~1 k/f 3/IA BALSA TIPS STABILIZER3/R3/IA BALSA LEADING EDGE BALSA RIBS Ii UPPER FRONT P00 SHEETING ICOCHPIT AREA II/IA BALSA SHEET UPPER REAR P00 SHEETING H-S TO POD ENDFUSELAGE POD SHEETINGS DOOR ER PLYWOODEIA BALSA SHEET BEAMS3/IA BALSACOCKPIT FLOOR AlA BALSA GREET /32 BRASSI/IA BALSA SIfETINGMAIN LU DOORS BALSA F-K TO F-INOSE SEARMARE H ALL PARTS DOOR ALLARE I/W BALSA ENGINESPARTS I/IA 3/16 BALSAURSOLANDING GEAR DOORS B BUSE WIREF-IF-DF-3KEELBALSA INBINA BEAKF-SF-ASTRINGERS F-7 F-BF-N F-ID LEFT BOOMSTABILIZER CARVED BALSA SPINNER3/IA BALSA KEEL NOTEFIREWALL MAYLEFT WING PANEL SEVERAL SEOREES TOLOCKHEEDP38I BE ANGLED OUTWARD BENEFIT ONE ENGINEDESIGNED B DRAWN BY GARY E BROWN OUT SITUATIONS pushrod works well avoids need internal control cables dont care looks wire can run cables both rudders synchronize Covering finish Carefully sand en tire framework preparation cover ing material choice model covered medium weight silkspan After wing panels covered before painted twist about Y4-in washout tips easily accom plished silkspan holding frame work over steaming pot water sev eral minutes Continue hold slightly twist after removing steam until silkspan dries Measure carefully / 3/IA V2 BALSA TRAILING EDOE 3/iA BALSA SHEET ensure get same amount washout wing panels steam again necessary Practically lightweight model finish can used silkspan liking lettering cut MonoKote Trim Tony LeVier pod handlettered brush dope Fox Skyways done transfer letSHEET 2 OF 2 AD Left On far side pod note bar diagonally across back cowlthis mounting nose gear door warped fit contour pod Right Beams 1/8 ply can seen top half pod Install nose wheel mount before applying pod stringers February 1984 35 Left Thats nylon nose gear mount just barely visible between stringers Slot small balsa squares mount nose gear door Right Cockpit detailing optional looks nice careful keep lightweight used WW II 9-in canopy Sig Mfg Co fits nicely tering available art supply stores overall finish done red fuel-proof dope several top coats clear Spinners mufflers etc 0ff-the-shelf hobby shop spinners dont have correct contour P-38 heres make own will need two CB Associ ates 2-in aluminum backplates prop shaft nuts fit engines Cut two balsa blocks little larger backplate dia meter 15/x-in long Drill hole perfectly centered perpendicular rear spinner block drill arbor Roughcarve block shape chuck arbor lathe electric drill turning block final spinner shape After outside dimensions finished will need carve out inside sure begin balancing spinner carve order initiate preserve good bal ance Remember side block likely heavier before start carving balancing complete line inside light glass cloth polyester resin Also give outside sev eral coats resin Use thin coats avoid uneven weight distribution final step mate spinner backplate creating resin lip base spinner fit groove backplate release agent melt little candle ski wax onto backplate allow flow evenly around groove well over edge Fill groove completely resin Roughen base spinner cone will contact resin groove Now backplate level surface squarely place spinner cone backplate resin groove will adhere base edge cone Once resin sets up will have perfect male mold backplate groove base cone Finish spinner epoxy paint durability Cowls made five laminations /2-in balsa 2-in-dia ring /6 plywood under spinner cowls held firewalls 4-40 screws through /4 ply bar epoxied diagonally across rear cowl contact firewall blind nuts mounted fire wall screws installed removed through air intakes front cowls method eliminates need external screws fasteners mufflers fabricated out K&S sheet brass tubing fit OS like experiment urge try building own mufflers Particularly Scale projects end results can often look better design muffler model rather design model around commercially-available muffler try building muffler brass stock use silver solder least 30% silver content Soft solders will hold up fuel tanks used rectangular 4-oz Sullivans will give plenty ca pacity 15-size engine suggest consider nothing aluminum mounting engines started glassfilled mounts found flexible enough allow engines vibrate intol erably certain rpm setting switched Continued page 123 36 Model Aviation bare bones built-up structure tail section shown have charm beauty Its ready covering Dummy supercharger intakes booms later rebuilt sheeted unmatched foam fiberglass Cowls firewalls fuel tank areas fuel-proofed polyester resin before painting Perma-Grit TM Lifetime * Carbide Sanding Tools Tungsten Carbide grit hardest material next diamond * Outlasts sandpaper 100s times * Tools will load up * Grit cant tear loose * Makes fitting blending fairing pleasure * Fairs LE TE foam undercutting * Rapid stock Removal better control * Saves time money aggravation * Replaces plane knife rasp ft sanding blocks excellent tools modeler can use Don Lowe Professional Engineer Ask Dealer send check M 0 No CODsl DG Products 209 Carrlands Dr Dayton ON 45429 513 294-1192 Tungsten carbide grit brazed steel 9 long tool use balsa hardwoods fiberglass beaded foams epoxy fillers plexiglas Made USA Average Modelers Use F100Flaf Coarse/Fine$695 F101 Flat Fine$695 F-102Flaf Coarse$695 R200 ius Coarse/Fine$695 R201 1/8 Tangent Coarse/Fine$695 R-2023/e Round Coarse/Fine$625 R-203h Round Coarse/fine$495 R204 Round Coarse/Fine$495 Postage Paid Ohio residents add 6% tax Gerald Martin Herford TXa very ood flying buddy Battle f Britain series Baa Baa Black leep next project will ob iure Dayton-Wright 1918 hich early retract gear rst round cowL Still researching leave thought ust Fun certainly ame game going rt very best out modeling obby Now saying. lotice Would contributor ent photos Ray Ardens minia ure historic engines please contact uthor Bill Winter 4426 A/tm-a Ct Fairfax 22030 -38/Brown ontinued pane 36 atone mounts securely bolted fire tails Most radio equipment should fit P-38 ut smaller lighter better rottle rudder elevator servos iounted sides wing oper te surfaces throttles via cables ileron servo mounted underneath ockpit just ahead front wing spar ailerons torque-rod operated rder allow outboard wing panels moved 3A2-in music wire torque rods onnect telescoping square brass ibing receiver battery pack laced forward portion pod landing gears bent /0-in tusic wire coil bender ide variety ready-made landing gears ie market will also job Brass bunting tabs soft-soldered up r ends two main gears mounted Former 4s /io ply three 4-40 screws id blind nuts nose gear mount nkage quite routine major dif rence normal being operated y aileron servo lying Though beginners model e P-38 difficult fly first flight might want leave cowls off until get engines properly adjusted Prior starting prime both en gines Start left engine first Peak being careful let get overlean Now start right engine synchronize ear left engine full throttle par ticularly careful overlean either en gine extra tweak needle valve usually gains nothing rpm might cause engine go dead after takeoff certain both engines idle reliably respond unison throttle changes both engines running smoothly ready takeoff takeoff run climb-out aver age length speed As model avoid abrupt nose-high attitudes after take off until aircraft has gained sufficient airspeed Once air model will feel quite stable control surface responses normal Continued page 126 product review product review product review Stampe SV4 French primary trainer @ $100 Champion Model Aeroplane Company Inc PO Box 891 Woodbridge NJ 07095 Some slight deviation scale provides lots construction simplicity case produces Stand-Off Scale super kit love bipes hate making cabane struts kit cabane struts prebent assembled brazed proper angles simply installed using two wheel collars nut bolt other com ponent parts individually packaged High quality balsa used throughout parts machine-cut shape formers individually saw-cut leading edge machine-shaped notched ribs grooved leading edge planking maple parts cut shape drilled tapped two-piece rolled plan cluded Stampe 5V4 Champion uses 45-80 engines 4-channel radio sports 1003 sq wing 6 7r/Ab package product review product review product review e e-- - * KIT BUILDERS Lighten snd strengthen nest project factory processed graphite glass balsa laminates * SCRATCH BUILDERS Design wits high-tech composites ultimate strength weight components ftC 510 551 already lamiliar MAGNALITE cnmpssitet try tample kit includes C F 007 C F Ot 4-Rigid graphite sheets C F 250 eon grain Dalsa graphite laminate O 5 t 25- 1/5 end grain balsa glass laminate O 5 250 1/4' end grain balsa glass laminate Graphite Runs 075 1/4 diameter trochure Shows bow louse composite Partial tinting al sizet pricet available CF 007t'n24'$900 6's24'$1800 sf2'$1300 12' sf2'$ 700 Promotional 12' 012'$ 850 sale price 1/4 o24'$1800 075's3t$450 fib$750 iga$850 $1500 $100 C F 014 C F 250 Gb 125 O 8 250 Graphite Rods Millen Fiber Glass Saloons New Sample Kit Brocbure 8ISA MASTERCARD COD CHECK OR MONEY ORDER Finrida Residents Add SOlo Sales Tat Add $300 Postage ling Developed Ry LETT MODEL S Sales Information BOB VIOLETT MODELS 1373 Citrus Rd Winter Springs FL 32708 Phone 3051 365-5869 February 1984 123 0hR wa q-p4 GOITIOLIII TillS PROF/LEn COMBA 70RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacities UKIFLOW & STIIDD Custom Dliii Vials Ingredients detailed brochure50C stamps/check oni CAROLINA-TAFFINDER 9345 Delhi Road Charleston Hgts SC 29418 803-563-7169 SAL TFORKII District 3 Symposium Workshop Jan 14-15 1984Sponsored Tusco RC Club Admission $500 y $800 ys Wives Free P-38IBrown Continued oaoe 123 Surface movements should approxi mately follows rudders 3/s-in both ways ailerons /4-in both ways elevator 5/6-in both wayswith little bit uptrim start Aileron response posi tive like full-size aircraft roll rate slow Ailerons rudders needed no trim adjustments elevator model needed bit up-trim offset nose-heaviness Landings Cub-like need full throttle first flight make few landing approaches well before fuel runs low get feel sink rate Dont try come final nose too high keep level down slightly until just before touchdown flair slightly have done some low-speed testing model altitude course hangs stalling surprisingly well youve always wanted try twin boxy add-an-engine designs turn off try racy P-38 Theres nothing like twinon ground especially air Radio Technique/Myers Continued aoe 39 would confuse voice music RC systems designers very concerned spatter however dont actually use ON/OFF switching Instead use shaped tran sition ON OFF ON minimizes spatter Just make things bit complex significant deviations ideal performance hardware both sys tems As consequence ON/OFF signalshaping mentioned above AM trans mitter puts little frequency shift transmitted RF signal time turns signal ON OFF shift FM its minor amount its needed control spatter shift decoded narrow-band FM receiver because re ceiver designed detect exactly kind small shift frequency Reminds Catch 22 doesnt point should point out servos controlled same way send little pulses voltage ON-time pulse determines servo out put shaft position see Fig 2 FM receiver little less ideal too theory ideal FM receiver ampli fies received signals point can clean off incidental AM use its limiting stages see Fig 3 However AM coming RCnbAM transmitter goes way zero also has exactly same configuration valid control signal should able see limiter cant get rid really wanted jam RCnbFM youd hard put find better way using RCnbAM now should grasp RCnbAM transmitter can control RCnbFM receiver amount AM put out RCnbFM transmitter negligible So does RCnbFM transmitter manage control RCnbAM receiver bandwidths RC AM FM sys tems have essentially same characteris tics Without becoming overly technical should able visualize RC sys tems spaced 10 kHz away other Common Carrier systems must neces sity use bandwidths equal less half distance between channel centers Therefore new narrow-band RC sys tems must use bandwidths 5 kHzor lessfor both AM FM systems IF intermediate frequency section RC receiver must designed cut off infor mation sharply slightly before 5 kHz points minimize adjacent-channel interference problems see Fig 4 Now lets take look what happens RCnbFM signal passes through real RCnbAM receiver happiest circumstances center frequency interfering RCnbFM transmitter happens land passband RCnbAM receiver deviated FM signal also lands within passband outputs two signals will equal shown Fig 5a voltage will sent servo wont pulse As consequence no interference control will result QSEE HOT STUFFTVIDEO-TI PS VHS CASSETTES #S 1 2 CLIP THIS COUPON SEND $5500 check MO GET BOTH VHS TAPES PLUS 1 EA 2 oz HOT STUFF 2 oz SUPER T 3 oz HOT SHOT FREE OFFER GOOD IN U S ONLY THRU JUNE 84 PO BOX 836 h4 S MI CA 93062 805 522-0062 126 Model Aviation Reservations Salt Fork Lodge Box 7 Cambridge OH 43725 800 282-7275 DIRECTIONS$54/night double US 22 East tram 177 just north Cambridge AMAIMA4IMACQSPRA Workshops will conducted areas RC including Gliders Gene Shelkey Electric Helicopters Fabricating Scale Parts Ed Wisser Monokoting Ramona Schultz Foam Cutting Bob Wallace other workshops Sigs Dave Brown Mark Ratcliffe Al Seidowski DISTRICT 3 MEETING further information call write Bob Button216343-7906 712 E 4th St Dover OH 44622 1731 6* 45 Street Ft Lauderdale FL 33309 13051 491-61 15 THE LANDING GEAR PEOPLE Tired 1 kit landing gears dcii III biggie property 0 & 0 Engineertug can solve problemil * Custom bout needs & specs guoranteod tit * Strong & durable withstand toighest landiog * 0 & 0 Eugloesriog gear wilt work & keep ysur biggie Ilylog * In otock roplaceweot gear br popular models Byron PIlls Cbniten Eagle LAP 21 Balsa USA J-3 CUB Air Tech Pawnee aid Eugle Nose Big Stick Champ ClIabria II & 0 medeli Soapper Stinger ond Snapper Tii