Tri-Flight

I eRt tied easy build ty Alsowas ou LA ite use N yon r Free ted 24 Model Aviation ST CONSTRUCliON wood Tn Flite may purchased Superior Balsa Hobby Supplies Tel [8001 488-9525 orders Fuselage build consistent-flying airplane care must taken ensure alignment use centerline top view reference Using Vs balsa Ply cut slightly oversize front rear pieces splice shown plans Trace fuselage sides cut FL shape glue have used excellent results Vs Lite Ply front rear fuselage Th approximately 2 1/20 incidence Slightly taper 3A6 x 3/ joining block rear fuselage glue sides block Glue Fl F2 F3 F5 F6 join fuselage sides glue F4 time fuselage bottom also consists /s Lite Ply Vs medium-hard balsa Join together after cutting slightly oversize shape Find approximate center draw line down center full length Glue bottom sides using slow-drying glue such Weldbond Note centerline marks formers sure line up marks centerline drawn fuselage bottom Shape removable hatch drill clearance 4-40 bolt Position F7 bottom hatch using Du Bro blind nut glue fuselage slightly below hatch position avoid having hatch adhere fuselage Locate approximate position F4 Mark line hatch glue piece 1A Lite Ply underside hatch mount Goldberg holddown bend hold-down slightly position locking screw F4 Now glue F4 fuselage hatch its proper location Cut mounting boles servo installations mount servo tray shown Install Y16 plywood doublers drill /4 holes wing holddown dowels Install dowels glue place Install servos pushrods Check see fuselage line centerline shown plan method fuselage should perfectly straight Glue top sheet balsa sides after providing breakouts ~shrods Finish gluing nose block position andthe Airtronics towhook Sand edges nice round contour fuselage now complete except covering Wing Cut wing ribs 3A2 sheet balsa Cut diagonal ribs 1/16 sheet balsa Lay aside ribs PRi PR2 PR Polyhedral Ribs Cut leading edges spruce spars trailing edges size carve sand leading edge shape left wing side turn plan over lightly spread glycerine right panel shown Shim leading edge tnck shown plans Secure ace spars trailing edge plans g edge bottom spars trailing edges sr ribs W-6 W-7 time Glue top spruce spar main panels Raise rearmost part tip trailing edge /16 produce tip washout Add top spar both tips After removing wing panels work surface shear webs diagonals may glued position glue shear webs section polyhedral utilized Glue bottom spar ribs W-6 W-7 April 1996 25 low-drag still plenty room radio components equipment used original model wing center section keyed hold powei attached wing #64 rubber bands Photos author Graphic Design Heather Erdahi original Tri-Flite covered silk structure substantial enough plastic coverings Prototype weighed 23 ounces shown Join tips main panels using plywood gusset PGl Join main panels together using plywood gusset PG2 Insert hard balsa between spruce spars tips main panels shown Section B-B Glue PRi PR2 ribs place Place 1/8 square turbulators rib notches glue place Plank bottom top center section 1/ light balsa sheet Notch install trailing edge center section 1/ x x 2/2 spruce Glue solid balsa both tips Complete shear web installation polyhedral joints Stabilizer The stabilizer conventional construction Choose medium-hard 1/4 square leading edge Note hinge locations sure allow 1/4 inch between center ribs rudder /4 balsa shown elevator control horn mount right side top view Rudder Similar stabilizer elevator construction Note hinge location 5/ elevator motion Pod Pylon pylon core 1/16 plywood shape determined engine will use Shape pod glue 1A6 plywood core mounting platform formed cutting V notch placing wing center section attain polyhedral angle Glue notch allow dry Line up plywood core glue mounting platform Shape 3/ balsa pylon sides glue diameter notch rudder plywood core Sand pylon pod streamlined shape Install 1/ plywood firewall Covering The choice covering material yours Tri-Flite very strong model structure does depend covering material strength Cover rudder sure remove covering rudder inserted stabilizer Cover fuselage except stabilizer glued Cover stabilizer remove covering material areas stabilizer glued fuselage Cut slot 3A x er leading edge entry fuselage stabilizer rudder assembly now glued fuselage After covering attach Y4 wing keys power pod join power pod fuselage use rubber bands between dowels over pod platform Locate center gravity CG adding ballast nose compartment model required four ounces attain proper CC rudder travel inch direction elevator travel 1/2 inch way upthrust 50 may vary due model weight Its critical may require adjustment after initial test flights fly hi-start winch simply remove power pod locate towhook shown have avoided warps located correct CG point built tip washout Tri-Flite will fly right off board total weight model less power pod 23 ounces 27 ounces power pod Go catch thermal have comments drop line Art Christensen 315 S Donald Ave Arlington Heights IL 60004 April 1996 27 Power pod assembly shows mount Cox Tee Dee 049 has more-than adequate power model Pod adds four ounces all-up weight lift going up Long tail moment arm aids stability substantial structure allows various launching methods power assist winch hi-start PR-II/BBALSA SHEET /TOPBB3TYOM tiA /Ir II / POD KEYS I/ADOWELI/B 55 BALSA TIWBSLAOSR SPARS V4x3/BBALSA LE I/A BALSA GUSSETS /1 RIGHT WING PLAN NOTE ALL WING RIBS ARE 3/3D BALSA /1 B B_ -~ VBD I4SFWJELP0 IDIA/AL /BOSALSARIB /EST GRAINSTYONI WRIB-I IWIPR262R3V/-A5*6W7 -- ---------------/7 V5x I/A SPRUCE VAS IBALSA --YE STOCKI/SH 1/A SPRUCE SPARS SECT 9-B W-7 3/B HO BALSA w I____ ALL RIBS 3/52 BALSA SKEETW 3 W 2 SEE TEST -FUSE BOTTOM ID V LITE 32_ 1/4 BOWEL rLPLY FROM NOSE OS HERE INS HOLD DOWN iFP3P4j5JPS P-I II PG-I1/16 PLY 1117 - W-5zi __R2- _ PB LSSi/4 BOWELILK BALSA SHEET IZL~7 1 BALSA BLOCK WINS TIPS v1 I/ASG BALSA I LE STAWLUER CROSS SECT OS ELEVAOSR 1/1K BALSA SHEET DIAGONAL RIB VA PLY PG-2 23/4I/IA H 24 - BALSACENTER OF PLATFORM I/A PLYWOOSPOLYHEDRAL DETAIL BALSA GINE PLATFORMFACE WITH I/SBLOCK GSTLNE SHEETPLYWOOD FIREWALL SU-SRO T-NUT IC tVBBALSA PADI/SBALSA LURLESE4 ARE /5 LI F440i/A BALSASALSABIBS SCREWI/ABOWELSECT A ES-BR -- --_ T-NST- --__________ LLASTI BATTERYj] RECEIVER _ :j----------- ______________________ BB-S___ P-IPD BO550 IS RUBBER NOSE SKID P-3 SWITCH FAI AISTRONICS ADJUSTABLE 1/B PLYWBODTOW HOOK SERVO TRAY F-K/ ILK LITE PLYI/B BALSA NOSE OS HEREREAR SECTION I/SC PLYFUSELAGE SIDE VIEW 1/S BALSA SHEET FUSELAGE OSP BOTOSM B SIDES RUDDER PUS HR GD IHBU5B I/2HALSA SHEET OP LVKH I/A RIBS B iI I SHEET A Li~ \ ______ TYPICAL RINSE VAS 22 BALSA 1/4 BALSATRAILINO EDUE MODEL AVIATION TRI FLITE DESIGNED BY INKED PLAN COMPUTERIZED IIG/9O ND FRIESTADALL BOnDS SKEEtO6 0 CD 0 P6-2- 1 N CD CD CD CD Ca CD 0