Top Flite TOPA0120 - Manual (Page 18)

❑ ❑ 25. Trim the 1/16” balsa Shear Webs to fit
behind the spar between ribs W-4 through W-12.
Glue them in place with CA+. Wick CA- into all the
joints of the Shear Webs and the Spars to make
sure they are well bonded. It is not important to
glue the shear webs to the ribs.
❑ ❑ 26. Cut a 13” length of Outer Pushrod
Tube. Rough up the outside of the tube with 220
grit sandpaper. Feed the tube through the holes in
the ribs as shown on the plans. Use CA to glue
the tube in place.
❑ ❑ 27. Cut three lengths of Inner Pushrod
Tube about 5/16” long and slide them onto a .074"
x 36" threaded one end wire, at the intervals
shown on the plans. Carefully apply a small drop
of CA to secure each short tube if they are not very
snug on the wire.
❑ ❑ 28. Snap a Nylon Clevis with Clevis
Retainer securely onto the
bellcrank. Feed the wire
assembly into the wing and
screw the threaded end
well into the clevis. Hint: The
wire is extra long. After the
threaded end starts threading
into the clevis, you may bend over the excess wire
and use it as a handle to turn the wire the rest of
the way into the clevis. Be sure to hold the clevis
securely with pliers while threading the wire into it
to keep from stressing the clevis pin. Cut off the
excess wire about 1-1/4” beyond the root end of
the spar.
INSTALL THE CENTER RIB (W-1)
❑ ❑ 29. Finish cutting the slot in the aft part of
the two W-1 ribs for the Wing Bolt Plate.
❑ ❑ 30. Glue the die-cut 1/16” ply W-1B
doubler ribs to the W-1’s. Be sure to make a left
and a right.
❑ ❑ 31. Glue the die-cut 1/8” balsa Fwd
Center Brace (FCB) to rib W-2 over its location on
the plans.
❑ ❑ 32. Place rib W-1 into position. Glue it in
place with CA+. NOTE: FCB sets W-1 at the
correct angle.
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