Top Flite TOPA0101 - Manual (Page 14)

not to alter the shape of the ribs during this process
(masking tape can be used to help protect them).
Final shaping can be done after wing joining.
❏
3. Trim the tip panel top and bottom spars so
they protrude 11/16" past T-1.
❏
4. Notch the front of the center section LE to
accept the tip panel LE. Notch the back of the
center section TE to accept the tip panel TE.
❏
5. Make any small adjustments necessary to
allow you to mate the tip panel with the center
section. Use a small ruler to check that ribs R-1
and T-1 can be positioned parallel and 11/16"
apart. Adjust if necessary to obtain a good fit.
NOTE: The 3/8" wide tip spar should be
centered over the 1/4" wide center spar.
❏
6. Place the wing upside down on a flat table
with the balsa 5/8" x 2" x 6" dihedral jig block under
the center section. This sets the proper dihedral
when the tips are on the table surface.
❏
7. Apply small weights to the tips of the wing. The
T-7 jig tabs and the spar tips should contact the table.
Adjust the LE and TE junctions of the tip and center
sections to align them and relieve any stresses.
❏
8. Check again to see that R-1 and T-1
are parallel.
❏
9. Tack glue the TE and spar joints with CA.
❏
10. Carefully remove the tip weights and look at
the entire wing. Make sure there are no twists in
the wing. If there are any problems, pop loose the
wing joints and realign them.
❏
11. Replace the wing tip weights and apply
30-minute epoxy to all joints involved. Use
30-minute epoxy to glue the die-cut 1/16" ply spar
joiners in place before the glue cures.
WING STRUCTURE COMPLETION
❏ ❏
1. Cut a piece of the outer pushrod guide
tube to 18". Roughen the outside of it with coarse
sandpaper. Carefully slide it in place through the
wing ribs. Glue it to all ribs it touches.
❏ ❏
2. Cut a 20" piece of inner pushrod tube and
screw a 1" piece of threaded rod and a nylon clevis
into one end.
❏ ❏
3. Use a sharp knife to cut a 5/16" sq.
window in T-4 where the pushrod passes through.
This will allow the pushrod to move slightly as the
bellcrank rotates.
❏ ❏
4. Slide the inner pushrod tube into place
and connect the clevis to the bellcrank.
REPEAT STEPS 1-4 FOR THE OTHER SIDE OF
THE WING
❏
5. If you have your aileron servo available it is
easiest to install it now. This will allow you to
confidently zero the bellcranks when the servo is in
its centered position. See plan for proper location
and mounting of the aileron servo. The aileron
servo is mounted on 3/16" x 3/8" plywood rails.
NOTE: The servo may protrude about 5/16" below the
bottom of R-6 into the belly-pan if necessary.
Skip steps 6 to 8 if you are using standard
sport ailerons and no flaps
.
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