Top Flite TOPA0410 - Manual (Page 16)

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❏ 21. Insert a T-pin from the back of the LE, through the
center of the 5/16" [7.9mm] holes in the wing dowel plate.
Keep the T-pins perpendicular to the LE as you push them
through. Remove the T-pins and drill a 3/16" [4.8mm] pilot
hole, through the balsa LE, at the pin hole locations. Enlarge
the holes to 5/16" [7.9mm] making sure that the holes in the
forward dowel plate align with the holes in the aft dowel plate.
❏ 22. From the 1/4" x 3/8" x 18" basswood stick, cut four
3" [76.2mm] long hatch rails. Use epoxy to glue the hatch
rails in the notches in ribs R-4B and R-5B.
❏ 23. From the 3/8" x 1/2" x 30" basswood stick, cut four
4-1/2" [114.3mm] long landing gear rails. Insert the rails
in the notches in ribs R-1 and R-2. Position the landing
gear on the rails, checking that the rails are parallel and
even. When satisfied with the fit, use 30-minute epoxy to
glue the rails in position.
BUILD THE WING TIP PANELS
NOTE: The tip panels are built “UPSIDE-DOWN” on the
wing plan (the jig tabs on the ribs are attached to
what is, in the end, the TOP surface of the wing.)
❏ ❏ 1. Place the wing tip panel plan on a flat building
board. Cover the plan with plan protector or wax paper.
T-Pin
Spar
❏ ❏ 2. Pin the 3/8" x 1/2" x 30" basswood main spar in
position over the plan.
❏ ❏ 3. Glue the die-cut 1/8" [3.2mm] balsa ribs T-1
through T-7, perpendicular to the spar. Make sure the jig
tabs at the TE are flat against the building board.
Cut a V-Notch in the Spar
T-6
❏ ❏ 4. Cut a V-notch in the 3/8" x 1/2" x 30" basswood
bottom spar so it can bend at rib T-6. Insert the bottom
spar into place. Do not glue the bottom spar to the ribs.
❏ ❏ 5. Notch the root end of the shaped 30" [762mm] balsa
LE and the 1/2" x 1" x 30" balsa TE to match the plan.
❏ ❏ 6. Glue the TE centered on the aft end of the ribs.
Note: Rib T-7 is glued flush with the top edge (plan side)
of the TE.
❏ ❏ 7. With the wing weighted down so the entire top spar
and all the jig tabs rest on the building board, apply glue
to all the rib and bottom spar joints. Make sure the bottom
spar is securely glued at T-6 where it is notched.
❏ ❏ 8. Glue the shaped LE, centered on the front of all
the ribs, except T-7 which will be off-center.