❏
3. Test fit one of the metal clevises in the holes in
both control horns on both joiner wires. If the clevis
pins don’t go in, enlarge the holes in the joiner wires
with a 1/16" [1.6mm] drill. Clean the joiner wires with
denatured alcohol, and then thoroughly roughen them
with coarse sandpaper so epoxy will adhere.
❏
4. Temporarily connect the clevis on the flap
pushrod to the top hole in the control horn on one of
the joiner wires. Position the joiner wire so the
pushrod is centered in the exit slot in the wing. Then
mark the location of the joiner wire onto the flaps.
❏
5. Use a 1/8" [3.2mm] brass tube sharpened on
the end or a 1/8" [3.2mm] drill to drill holes into the
flaps in alignment with the marks that note the
location of the joiner wire.
❏
6. Use a 1/8" [3.2mm] brass tube sharpened on
the end or a hobby knife to cut grooves in the leading
edge of the flaps to accommodate the wire.
❏
7. Test fit both flaps to the joiner wire. View the
trailing edges of the flaps from the end of the wing.
See if the flaps are parallel with each other (have the
same “up” and “down”). If necessary, “tweak” the
joiner wire to align the flaps.
❏
8. Test fit the flaps to the wing with the joiner wire.
Cut a half-round notch in the trailing edge of the wing
to accommodate the solder joint and the control horn
during maximum flap deflection. Make certain
nothing interferes with full, smooth flap movement.
Make adjustments where necessary.
Join the Flaps to the Wing
❏
1. Remove the flaps, hinges and joiner wire from
the wing. Carefully apply a small dab of petroleum
jelly or small drop of oil to the pivot points on the
hinges to keep epoxy from getting into the hinge joint
and jamming up the hinges.
❏
2. Lay two or three paper towels on top of each
other. Cut the stack into small squares by cutting the
stack into four, equal-width strips. Cut the strips into
four equal squares. These paper towel squares will
come in handy throughout the building project (and
save you from wasting whole paper towels!).
One flap at a time will be glued to the wing…
- 8 -
