PT

NO OCR TEXT NO OCR TEXT older military insignia fact trainers ended up hands private owners sometimes modified aerobatic work means finishing schemes available Scale modeler looked Fairchild PT-19 PT-26 mime engines figured Quadra Q-42 just couldnt made fit narrow cowl Ijust didnt want try duplicate exposed cylinders radial engine installation some aircraft fun Scale model project decided go round cowl would easily contain Quadra other large gas engine ended up stand-way-off sort-ofScale generic copy PT-19 -20 -21 -22 -23 -25 Total its PT-146 Works field modelers ask its PT22 -23 whatever Obviously thing really Scale fuselage has slab sides no rigging wires landing gear mounted fuselage rather wings etc does have two pilots behind windshields nice-looking round cowl familiar trim scheme old-fashioned insignia builds up fast easy flies great wanted keep PTs proportions similar other Q-42 powered aircraft liked laid out wing 96-inch span large span Quadra rounded wingtips wing area about 1300 square inches good size keep wing loading reasonable Q-42 engine stock Quadra muffler 1200 mAh battery pack six standard servos plastic film covering usual building techniques PT weighs 15 lb 12 oz wing loading 28 ounces per square foot Quadra weighs 4 lb 4 oz complete airframe equipment 11 lb 8 ozgood think large-size model quick-and-easy foam core construction stayed 16% symmetrical airfoil Ive good luck its fully aerobatic fast enough slows down well keep horizontal stabilizer vertical fin area large side think ample tail volume helps make easy handling aircraft rugged sheet aluminum landing gear used bolted fuselage bottom just ahead wing leading edge Thats major deviation scale aluminum gear simple easy went round molded fiberglass cowl Fiberglass Specialties 38624 Mt Kisco Dr Sterling MI 48310 easily mounted some hardwood blocks plywood spacers firewall will enclose engines suitable airplane avoids problem build exposed radialengine cylinders friend Lou McGuire built PT along with differences being trim schemes went aluminum chrome MonoKote fuselage yellow wings tail surfaces Lous has blue 26 Model Aviation e fiberglass cowl can easily contain almost large engine muffler Hole carburetor access choking Landing gear bolts plywood mount fuselage Cowl attaches four nylon bolts bottom cut away clearance Plenty room fuselage Two servos elevator throttle rudderltail wheel basic balsa/plywood fuselage box topped foam blocksnot yet sheeted photo Two templates used cut foam wingtip cores see text left foam block has just cut Lou McGuire left author PTs Lous model trimmed US Navy markings authors US Army January1996 27 Fuselage top foam cores have sheeted cockpit openings have cut out Easy quick Tail surfaces /a foam balsa edges reinforcements shaped sheeted both sides /32 balsa Wing sheeted foam core Aileron cutout lined balsa Aileron servo cutout has plywood mounts place REINFODUF FIREWALL JOINT WITS FIBERGLASS CLOTSFUSELAGE TDP BLOCKS NOT SHOWN / AIM EPOST CDWL LOCATION FIBERGLASS CONL AVAILABLE FROM FIBERGLASS SPECALTES SaGER MT KISCO DR STERLING HEIGHTS MI BS0 5f4 PLC SPACER PERMITS USE OF C/4 BALSA _____________S/Sf BALSA SHEETING OVER FOAM CORES F BERG ASS COW S/B BALSA '2 3D P F REWAWINDSHIELD FRAMESCOCKPIT ID P BRACKE SOPENING B HARDWOOD B OCKSB BA SAI/U PLYWOODPATTERN DRAlt TAP FOB N ON DO SCOCKP F DOR TO MDUNT COWBALSAVERTICAL FIN 1/B BALSA OVERTO STAB BLOCKFOAMESTENDS TSROUGH CORE TOP SECTIONSFUSELAGE TOP [v32][b-1-10-1-10]] I-- 174 PLrWDDD DRILL AND TAP 174 -20 SPINNER I/B BALSA DOUBLER 1/B BALSA BULKHEADS TWO ELEVATOR SERVOS WITH TE LINKAGE TO EACH DR RECOMMENDED CIMPUhTI/TI 9/23/IS RflWESTAO K II II 7T Tha PT SPORT/AEROBATIC AIRCRAFT FDR LARGER ENGINES DESIGNED AND DRAWN UT DICK SARPOLUS SHEET OF 2798 1 4i--- N _______ SERVOS ____ MOUNTSON WING QUADRA042 ZENDAN 0 SB SUPER TIGER 5 00004 1/2 WHEELS OR SIMILAR ENGINES RECOMMENDED 0 0 I 2 5 4 5 0 F B B ID II IS 0 CD 0 ____ I/U TRIANGLE STOCK /7 1 C CD -o i 0 5 Ci CD CD 0 CD DIHEDRAL UB UNDER EACH TIP INSTALL AILERON SERVO ________HOLE THROUGH FDAM CORE-- -___________ FOR AILERON EXTENSION CABLE WRAP CENTER SECTION WITH HEAVY FIBERGLASS CLOTH AND EPOXY______ I/G BALSA CENTER PIECE ALSO THE FOAM CORE SECTION AT WINGTIP FOAM CORE WINGTIP TEMPLATE CROSS SECTION 1 __________/11/j S/52 BALSA SHEETIHG CONSTRUCTION FOAM WING CORE TEMPLATES FOAM CORE FUSELAGE TOP BLOCK TEMPLATES IH N II1 It'I II 1 K 7~' I~ PT SHEETS OF CIUPCI7CIIZCI /95 SIAO 7982 fuselage yellow wings tail surfaces Mine has US Army fuselage sides Lous has US Navy course both have older military insignia little variety rather round cowl fiberglass cowl Choice Cut design might simulate inlineengine-powered aircraft formed plastic canopy over two cockpit positions would replicate PT-26 really wanted work PT-22 type landing gear install type wings Figure out make exposed engine cylinders could go PT-22 like PTs appearance air like aerobatic capability Lou says its about easiest-flying big airplane hes ever can relax least somewhat CONSTRUCTION youve scratch-built large projects like before probably have own building techniques would comfortable building directly plans dont hesitate try scratch-built airplane like find someone cut cores order bunch balsa plywood good supplier get cowl aluminum gear cut out wood parts assemble kit PT has foam core wings tail surfaces fuselage top blocks Im sold foam core construction scratch-building sport aircraft its lot easier drawing up rib patterns assembling built-up structure Wing cores sheeted 3A2 medium balsa edge-glued needed width taping joints together masking tape hard part edge-gluing balsa getting tight fit between individual sheets balsa sheets come straight edges As long sheets fit together well dont have straight may able get good joints trimming sanding edges use long sanding straightedge made piece aluminum right-angle stock working edges necessary until sheets fit well enough taped glued Flip wood over open taped joint over edge workbench apply glue use aliphatic-resin glues easier sand smooth joint joint laid flat workbench scrape excess glue off putty knife continue same process balance joints weight wood down until glue dries Peel off masking tape use taped side outer surface sheeting sand inside surface sheeting rougher sandpaper speed up work use finer sandpaper finish off outer surface years Ive used Dave Browns Southern Sorghum contact cement sheeting cores Alternatives thinly spread 30 Model Aviation TUIS WE 0UY AOR usr 14E IE5IJLT %ALE $PlNNER 74C L L B DICK SdUO44JS - BI1LS OfR FOAM BERGLAS5 CGWL rIJiER flLLAM - 5 A4 - NLS TR1-rocK - -2 V VV - V 4WHEEL5-2 B4bS SIlT THE BEST IN SCALE SCALE DRAWINGS & PHOTOS building kits available Extra 300s SU26s scale drawings photo pacs will just what looking 300 SU26 just few documentation drawings available Photos David Boddington England COLOR PHOTO AVAIL CATALOGS Best Scale$400 NEXUS Aircraft$6 00 NEXUS Scale Orawnigs$500 RCMW Plans catalog$500 VrH German catalog$800 PLEASE Al S2OOPP Call for ssfbrmation andcredit card orders 909 885 3959 fan 889 9307 Extra 300 t/24th scale Extra 3005 1/24th $850 SU-26 1/24 scale SU-26 Mx 1/24th $725 Ad 5200 postage epoxy glue other suitable contact cements Just sure type select made hobby use test thoroughly yourself Some contact cements can dissolve foam after think completed wing safely done core sheeted top bottom trim off leading edge block-sand square Add oversized leading edge strip plane sand shape thing held back building aircraft like deciding what wingtip structure finally hit upon cutting tip section upper lower part joining get tapered foam core tip section Two plywood templates needed planfomi layout wingtip end main wing panel tip root template added another upper half airfoil mirror-image template setup needed other half wingtip Cutting cores wasnt bad once reduced wire temperature somewhat avoid melting too much foam away balsa stiffener between upper lower foam cores helps keep things aligned until core sheeted tip section sheeted sanded simply epoxied main wing panel Before sheet tip core trial-fit main wing panel sand foam necessary good fit after sheeted Epoxy sheeted tip main wing panel sand round off outer edge tip section ailerons cut sheeted wing trimmed allow balsa edging Glue edging wing panels ailerons plane sand shape hinge ailerons along centerline using large sturdy freely moving hinges Cut recesses lower wing surfaces aileron servo mounting Before join two wing halves sure make holes through foam cores aileron-servo extension cables heat end piece heavy steel rod push through foam core root aileron-servo mounting location used install servos within wing section use removable hatches above current trend simply install servos wing surface leave visible doesnt look neat servos linkages certainly accessible plywood wing-mounting key used leading edge position retain wing fuselage reinforced plywood rib installed root wing cores contact area fuselage bulkhead retains wing mount can trimmed shimmed necessary get correct wing-to-fuselage fit prefer method find easier using two heavy dowels wing retention After wing halves butt-glued epoxy center joint wrapped heavy six-ounce fiberglass cloth epoxy glue Use double layer center Ive using nine-inch-wide strips cloth 32 Model Aviation HOLMAN PLANS P0 BOX 741 SAN BERNARDINO CA 92402 MA 909 885 3959 fax 909 889 9307 overlapped center give five-inchwide double layer brush coat epoxy position fiberglass cloth brush additional epoxy sure cloth saturated reasonably smooth appearance too much sanding squeegee off excess epoxy leaving enough cloth saturated strength smooth level Hobbypoxys Smooth n Easy epoxy ideal forthis Tail surfaces flat-plate section use hot-wire-cut 3A foam panels cores inside balsa framed sheeted assemblies built-up internal construction coald used foam makes easier quicker tail surfaces built flat workbench surface foam cores cut shape alsa framing reinforcements added sheeted 3A2 balsa done wing cores edges shaped trailing edges stabilizer vertical fin left square leading edges elevators rudder beveled centerline hinging Fuselage Select firm-to-hard balsa two sides edge-gluing splicing necessary get size required Glue 3A2 plywood doublers ood landing gear block doublers balsa wing-saddle pieces stab saddle doublers balsa lower edge strips two fuselage sides before adding bulltheads laminate pieces lywood make wall fuselage side flat workbench add firewall next three bulkheads side installing perpendicular side Glue second side bulkheads sides parallel firewall wing trailing edge position Add triangle stock heavy fiberglass cloth behind firewall reinforce its junction sides Add ood wing-bolt plate balsa cockpit floor Pull tail end together installing rear bulkheads As done can position assembly over centerline sure fuselage straight fuselage sides taper straight line rear straight-cut foam top block will fit correctly Before sheeting foam fuselage top blocks check see will line up flush bottom fuselage assembly sheeted close enough sanded match foam cores can sanded some extent proper alignment Sheet foam blocks same manner wing cores Trim sheeting check fit cut two cockpit openings before gluing top block place Depending fuel tank configuration use whether youll using smoke tank might want carve recess foam top block behind firewall added internal room lined cockpit openings thin plywood epoxied place Cut slot rear fuselage top block vertical fin glue top block place Add plywood landing gear mount forward bottom section fuselage Before ANOTHER JIM MEISTER 1/4 SCALE SEMI-KIT liiQComplete & Partial Kits 1OO Span2 5 Cu Inalso available Phone intornation Scala tight tiainmg manual availahle 0500 olans 0200 Aseaboatoui ealsa-ply ConstructionMarking templates 30 lb rated Notch tab easyAccurate scale outline FaN-TRAX PLANS$4000 assembly-Complete instructions REORACSS CANOPY$3000SEND TO Retracts shown4 sheets plansas low OtybCOWL$3000 tohaust gun slotsTwoFREE CA TALOGSPINNtR 5%$4000Jim Meister piece WlO gun blisters curbHigh lift airfoil forEXHAUST SCOOPS 5006319 NC 40 intake scoop asoilablevery slow landingsFREE SHIPPING$ioaoMebane NC 27302 formeo plasticCATALOG9101 5023700 TOTAL$ MUSTANG CORSAIR SPITFIRE MKII P-41DTHDNDERBOLTI sLe Messffsdmlltt N T-ON OWEN LESS HMSSLE MOE RIM Dieselize Davis Diesel Its Awesome 0% Power Easy Starting e&kiSgi No Glow Plugs Twice Long e Sound DAVIS MODeL PRO P0 Box 141 Dept MA ord CT 06460 877For complete information packet send $400 credit applied first order YouCSCALE HEADQUARTERS Large Model Fun Easy Way- Engineered Lazy Builders adding rear fuselage bottom section cut holes rear bulkheads elevator rudder pushrods wait until tail surfaces installed fuselage pushrods installed wing fitted before adding bottom planking Fit wing fuselage next adjusting fit wing mounting key necessary through fuselage bulkhead drilling tapping wing mount plate two -20 nylon bolts wing mounted add horizontal stab aligning wing vertical fin added perpendicular stabilizer plywood section bottom rear fuselage used mount leaf-spring tail wheel assembly Whatever type hinges use cut notches drill holes along centerlines surfaces notch control surfaces appropriate permit close fit surfaces main structure still allowing proper movement recess control surfaces accept plywood mounting pads nylon homs go ailerons elevators rudder Epoxy plywood mounts surfaces homs mounted self-tapping screws use ood servo mounts fuselage 4-40 threaded rods devises linkages Fiberglass-tube pushrods used elevator linkages Using separate servos elevators its own pushrod allows pushrods perfectly straight Since pushrods cross over within fuselage elevator servos mounted higher other keep two pushrods rubbing together tail wheel steering tied rudder small springs actual rudder linkage can done pushrod twin-cable pull-pail setup make up aileron extension cables Y harness two aileron servos mounted wingA 1200 mAli battery pack used wrapped foam rubber positioned behind fuel tank above wing fuel tank can positioned foam-rubber blocks held place rubber bands screw eyes Engine mount Qundra Q-42 like quiet stock muffler come engine permit its use 3/4-inch-thick spacer three layers ood behind engine mount provides clearance muffler ahead firewall position retain round fiberglass cowl four plywood pieces hardwood blocks added firewall will locate cowl cowl trimmed needed held place four nylon bolts drill tap hardwood blocks accept bolts plywood landing gear mount also drilled tapped bolts hold gear place mount ignition switch bracket off side firewall accessible behind rear edge cowl Use spinner aluminum hub nut appearance cockpit windshields cut plywood fitted place epoxied together cut top sheeting little after airplane has covered ensure good bond gluing windshields place Clear plastic glued inside windshield pieces used Williams Bros pilots spacing up bit cockpit floor balsa blocks proper appearance Covering/trim Use iron-on plastic films quickest lightest covering covered fuselage chrome MonoKote rubbed fine steel wool kill shine better resemble aluminum covering Any sort insignia available Major Decals/Northeast Screen Graphics selection great Scale effect rigging wires struts could added between fuselage wings wire bracing tail surfaces sport aircraft some scale detailing always nice Hying wasnt worried about test flying PT immediately comfortable its flying characteristics Its aerobatically capable still very easy comfortable fly slows up nicely landings wish installed landing flaps doesnt need would add some fun would look good PT requires same caution attention due large aircraft thing pure fun fly Fly safely Dick Saipolus 32 Alameda Ct Shrewsbuiy NJ 07702 LEGAL BARON P-Si Engine 60-120 511/2 Decala available Call info oack SWRA LEGAL RJ P-51 Engine 60-120 Span 511/2 Decals available Call info pack Also Available Roto Finish Stiletto Color Tile P-51 Sky Harbor R/C Fine Woods 1-800-279-2871 January1996 35 bWHA0 HE VACE PLANE Engine High Performance 40- Span 48 56 P-38 LIGHTNING 70 WING SPAN 40 TO 60 ENGINES DESIGNED NY\Aj-~576 SD IN HAL PA REM TI BASIC SEMI-KIr$8499 FULL COMBO PACKAGE . INCLUDES SEMI-KIT SIG WOOD P4K COMPLErE SPRING-AIR RETRACT GEAR SYSTEM DECAL SHEET HARD WAREAND WING SHEETING GLUE$35796 COMBO SPECIAL$31999 ADD $799 SHIPPING IN USAIL RESIDENTS ADD 7% TAX VISA & MASTER CARD ACCEPTEDCALL 300-342-3009 WING MFG 305 E SIMMONS GALESBUNG IL 61401 *21 Scu *24 HP___*3 HP *45 lbsII L2 LAgINeS *45 lbs *mufflI 3 Pro ducts*muffl *hi~tI linkageMade Excellence*throttle linkage Amencan* *CDI IgnitionCDI gmtion US35US41 Catalog $1 Distributed Reids Quality Model Products Dealer Inquiries Invited 16 Main Street Phelps NY 14532Domestic/Overseas Visa/Mastercard Accepted315-548-3779 548-4099 Fax Authorized Warranty Repair Center