Start with the right aileron.
❏ ❏
1. Cut the covering from the right aileron servo mount
in the bottom of the wing. Hint: Cut the covering 1/8" [3mm]
inside the edges, then use a trim iron to seal the covering to
the edges.
❏ ❏
2. Connect a servo extension cord to the aileron servo
wire. Secure the connection with vinyl tape, heat shrink
tubing, or special clips suitable for that purpose.
❏ ❏
3. Tie the end of the string that is taped inside the
wing to the end of the servo wire. Pull the wire through.
Note: If something happens to the string such as it breaks
or it cannot be located, don't worry. Tie another piece of
string to the servo wire and tie a weight (such as a wheel
collar) to the other end of the string. Place the wing on end
and drop the weight down through the holes in the ribs. Pull
the end of the string out of the hole in the middle of the wing.
Refer to this photo for the following two steps.
❏ ❏
4. Drill 1/16" [1.6mm] holes in the wing for mounting the
aileron servo. Add a few drops of thin CA to the holes and
allow to harden. Mount the servo to the wing. Note that, for the
right aileron servo shown in the photo, the servo arm points
towards the middle of the wing and the output shaft is toward
the trailing edge. The left aileron servo is mounted in a “mirror”
image (with the servo arm pointing toward the middle of the
wing and the output shaft toward the trailing edge).
❏ ❏
5. Thread a nylon clevis twenty full turns onto a 6"
[150mm] threaded pushrod. Connect the clevis to a control
horn with a silicone retainer over the clevis. Place the control
horn on the aileron so the pushrod is in alignment with the
servo arm. Use a felt-tip pen to mark the pushrod over the
holes in the servo arm. Bend the pushrod at the mark, then
fit a nylon Faslink (shown in the sketch above) to the
pushrod. Cut the pushrod so 1/16" [2mm] protrudes from the
Faslink. If necessary, enlarge the holes in the servo arm with
a #48 (or 5/64" [2mm]) drill. Connect the pushrod to the
servo arm with the Faslink.
❏ ❏
6. Drill 1/16" holes into the aileron for mounting the
control horn with two #2 x 1/2" [13mm] screws. Add a few
drops of thin CA to the holes and allow to fully harden.
Mount the control horn to the aileron with two #2 x 1/2"
[13mm] screws. Be certain the screws are secure and get a
good “bite” into the wood. If necessary, remove the screws,
add a few more drops of thin CA to the holes and allow to
harden. Remount the control horn.
❏
7. Mount the left aileron servo and make the pushrod
the same way. Install the screws that hold the servo arms to
the servos.
❏
1. Use epoxy to glue the three plywood forward wing
joiners together. Wipe away excess epoxy before it hardens.
Join the Wing
Servo Arm
Hook Up the Ailerons
9
