Top Flite TOPA0150 - Manual (Page 38)

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4. Round the wing tip and aileron tip.
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5. Repeat steps 1 through 4 to build the other
wing tip.
Build the flaps
We’ll show you the right flap...
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1. Cut the right aileron from the wing. True up the
outer TE spar in the aileron area by sanding the
remainders of the ribs and the top and bottom sheeting.
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2. Cut the bottom flap skins from a 1/16" x 3"
x 30" balsa sheet. The skins extend from rib W-6B to
middle of rib W-2C. Glue both skins into position.
Sand the skins and the 1/8" x 3/16" balsa strips on
the underside of the top flap skins even with the
bottom of the wing.
Refer to this photo for the following two steps.
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3. Finish cutting the rest of the way through ribs
W-3 through W-6B (where you cut partway through
during preparation) and remove that portion of the ribs.
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4. Trim the bottom wing sheeting even with the
outer TE spar in the flap area.
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5. Mark the locations of the flap ribs on the die-
cut 1/16" balsa bottom flap skins where shown on
the plan.
Note: The flap must be constructed over a flat
surface so it fits the wing.
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6. Cut the flap LE from a 1/4" x 7/16" x 24" balsa
stick and glue it to the top of the bottom flap skin.
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7. Cut the flap ribs from a 3/32" x 1/4" x 30"
balsa stick. Cut the flap hinge blocks and the flap
control horn base from the remainder of the 1/4" x
7/16" x 24" balsa stick you used for the flap LE. Glue
the flap ribs, the hinge blocks and the control horn
base to the flap. Use a bar sander with 80-grit
sandpaper to bevel the ribs, the TE of the skin and
the flap LE as shown in the sketch.
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8. Glue the die-cut 1/32" plywood flap frame to
the flap.
If you are building working flaps, go to step 3. If you
are not building working flaps, perform step 2, then
go to
Finsh building the ailerons on page 39.
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