Top Flite TOPA0120 - Manual (Page 17)

❑ ❑ 18. Work the Upper Spar assembly into
place, making sure it fits well. Put some weights
on top of the structure to make sure it is held onto
the work surface. Fit the die-cut 1/16” plywood
Fwd and Aft LG Box Webs between W-3 and W-4
to confirm the angle of these ribs. Use CA to glue
in the top spar. Thoroughly glue the Fwd and Aft
LG Box Webs to the spars as well as W-3 and
W-4.
❑ ❑ 19. Hold the shaped balsa Leading Edge
centered vertically on the front edge of the ribs.
Use CA to glue it in place.
❑ ❑ 20. If you are going to use flaps, trim the
1/4” x 3/8” balsa stock left over from the wing spars
to the length shown on the plans for the Flap Bay
Rails. Glue the rails into the notches in W-5 and
W-6 with CA. If you do not plan to use flaps, you
should fill the notches with scrap wood.
❑ ❑ 21. Glue the aileron bellcrank assembly
into the slots in ribs W-8 and W-9. The bellcrank
should face away from the building board as
shown in the photo.
❑ ❑ 22. Glue the die-cut 1/8” balsa Corner
Brace into the corner of W-8 and the Trailing
Edge.
Note: Do steps 23 and 24 for a plane
without operating flaps. Skip them for a
plane with operating flaps.
❑ ❑ 23. Test fit, then glue in the die-cut 3/32”
balsa Flap Tip Rib at the location shown on the
plans.
❑ ❑ 24. Glue in the die-cut 3/32” balsa Flap
Root Rib.
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