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Top Flite Models Piper J-3 Cub Assembly Manual

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BUILDING THE PIPER J-3 CUB

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Summary of Contents for Top Flite Models Piper J-3 Cub

  • Page 1 BUILDING THE PIPER J-3 CUB...
  • Page 2 INTRODUCTION The construction sequence in the instruction manual has been proven to provide quick and accurate assembly. Do not deviate Top Flite is proud to present it's large, scale version of the legend- from the instruction manual. Read through the manual first ary J-3 PIPER CUB.
  • Page 3 6. With a razor blade, carefully cut away the T.E. sheeting and aileron cap strip to accept the 1/16" ply aileron horn plate — W-19 (PLY). Glue W-19 (PLY) in place. 7. Locate and remove all W-12 aileron riblets from their die cut sheets.
  • Page 4 11. Glue the bottom end of each full rib (W-2/W-3 (PLY), and 16. Prepare the top forward 1/8" x 1/4" x 36" sheeting spar for all W-4's to the 1/16" x 1" x 36" bottom T.E. sheeting. The installation by first trial fitting it into place into the rib slots — relieve any rib slot that might force this spar out of true.
  • Page 5 23. Locate and remove the 1/16" thick W-19A (PLY) horn plate doublers from their die-cut sheet. Glue in place on top of horn plate W-19 (PLY), as shown on the plans. Locate and remove 4 of the G-2, 3/32" balsa gussets and glue these in place into each corner of each aileron as shown on the plans.

  • Page 6: Tail Surfaces

    TAIL SURFACES 28. Using a sanding block, bevel the wingtip from the 1/8" x 1/4" sheeting spar, forward thru the 5/16" sq. L.E. to pro- Accurate joints, complete glueing and a flat work surface are vide seating for the 1/16" balsa L.E. bottom sheeting. Glue essential to strong tail surfaces.
  • Page 7 RUDDER 1. Start the right side by pinning and glueing the two-piece 1/4" square upper balsa longeron in place. The forward piece is 1. Glue and pin in place die-cut parts R-2, R-3 and the 1/4" x from the front of the firewall to F-11 position. The rear 1/2"...
  • Page 8 9. Pin and glue the right and left fuselage sides over the plans and to the cross-pieces, diagonals, the rear landing gear block Cut two fuselage sides. Note that at the furthest aft point the and to each other at the rear tail-post. Use a triangle to keep fuselage side ends at F-4 on the top and angles forward to the the sides at 90°...
  • Page 9 10. NOTE: This step assumes that you will be mounting your Epoxy both F-12 (PLY) forward landing gear block supports engine to the right side as shown on the plans. in place on the inside of the fuselage. Also epoxy both F-13 (PLY) rear supports in place.
  • Page 10 Epoxy F-14 (PLY) and F-15 (PLY) in place, on top of the With the 1/4" balsa sheet provided, accurately measure, cut fuselage longerons, against formers F-10 (PLY), F-11 (PLY) and fit the top cabin sheeting in place from the back of F-10 (PLY) to the front of F-4 (PLY).

  • Page 11: Landing Gear

    Remove the 1/4" die-cut F-21 fin supports from their sheet. LANDING GEAR Note that these fit in place in the notches provided on each Note that the landing gear wires have been essentially pre-bent to side of F-9, back to the trailing edges of the fin. Bevel the shape.

  • Page 12: Final Assembly

    4. Clean-up each of the solder joints with a wire brush and make 7. Slightly enlarge the hole in the W-1 (PLY)/W-2/W-3 (PLY) sure that the joints are strong. With the 1/4" sheet provided, wing roots to accept the outer diameter of the 1/4"-20 blind make two inserts to fill the triangle created by the front and mounting nut that will serve as the wing bolt attach point.
  • Page 13 threaded stud that is to be tapped 1/2" into the inboard end vent "snaking". The location of the rudder and elevator of the strut. Do not drill this hole any deeper than 9/16". horns should be established, the holes drilled but not installed Tape off 1/2"...
  • Page 14 If, for any reason, you choose not to use Fabrikote for covering and mounting blocks. Screw the three No. 2 x 1/2" cowl your Cub, we recommend that you use some kind of fabric cover- mounting screws in place and remove the tape holding the ing, such as silk and dope.
  • Page 15 Repeat this step on the opposite wing panel. Once you are satis- Your radio equipment MUST be reliable. DO NOT attempt to fied that the wing panel are aligned properly with both the fin fly with a radio that is suspect in any way. and stab and each other, "lock"...