.
45.
a. Glue in the 1/8"x3/8" lite-ply rib
stiffeners. Don't forget the short
pieces just inboard of the aileron.
b. Sand down the inboard end of
the wing panel bringing the
spars, leading edge, and trailing
edge flush with the side of the
W-2 rib.
46.
Saw out the aileron using a razor saw
to cut through the ribs. Exactly where
you cut is not too critical as long as it's
somewhere between the rear spars and
the aileron spars. Cut through the W-4
rib on the outboard end of the aileron,
then remove and discard the part
remaining attached to the aileron. The
W-4Asubrib will serve as the outboard edge of the aileron. Use a sharp modeling
knife to cut the top aileron sheeting and the temporary spacers on the inboard
end.
47.
a. Trim and sand the back of the wing cutout until the ribs are even with the
rear spars. Use a long sanding block to sand just enough to make the
back edge flat, as shown here.
b. Sheet the back of the wing cutout with 3/32" x 1-1/2" x 30" balsa, cut to
length. When dry, trim the sheeting to airfoil contour.
48.
a. Sand the outer end of the wing panel, bringing all of the spars and
sheeting flush with the end W-4 rib.
b. Glue the die-cut lite-ply WTR wingtip rib to the end of the wing.
c. The fiberglass wingtip can be glued to the wing using epoxy or CIA. Be
sure to clean and lightly sand the inside of the fiberglass where the glue
will come in contact. Notice that the wingtip overlaps only onto WTR when
glued in place. Also notice that WTR does not extend all the way back to
the rear point of the wingtip. The small gap that remains can be left as it is
or filled with scrap baIsa.
d. Feather the wingtip into the wing using model filler.
49.
a. Trim and sand.the front of the
aileron in line with the angled,
die-cut slits in the ribs.
b. Add the 3/16" x 1-1/2" x 30"-
balsa aileron leading edge.
c. When dry, sand the aileron
leading edge to shape.
d. Sand each end of the aileron flat.
50.
a. Glue in the W-4A aileron rib in the position shown on the plans. The aileron rib may need some trimming to slip into
place.
b. The aileron control horn is actually a 90-degree bellcrank. Cut a slot in the aileron leading edge (don't cut the spar!)
just large enough for one arm of the horn, then epoxy the horn firmly in place on the W-4A rib. See the "Wing Rib
Cross Section" at W-4 (Plate 3) to see exactly how the horn is positioned.
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