Top Flite TOPA0970 - Manual (Page 11)

11
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9. Repeat steps 1-8 for the left wing panel. Make
note that the fl ap servo arm will be mounted pointing
toward the wing tip side of the left wing panel so that
when the fl ap servos are joined together using a
Y-harness, they will both move in the same direction.
INSTALL THE AILERON
AND FLAP PUSHRODS
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1. Thread a 2-56 nut and a metal clevis 15
complete turns onto a 4" [102mm] pushrod. Slide a
silicone clevis retainer onto the clevis and connect the
clevis to the outer hole of a nylon control horn.
Hinge Line Hinge Line
CORRECT INCORRECT
Hi
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2. Position the control horn over the plywood
plate in the aileron (if you cannot see it, hold the
aileron at a shallow angle in good lighting or use a
small pin to puncture the covering) using the position
of the servo arm as a guide. Align the holes in the
control horn directly over the aileron hinge line and
mark the location of the control horn mounting holes.
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3. Drill 1/16" [1.6mm] holes at the marks you
made through the plywood plate. Do not drill all the
way through the aileron! Thread a #2 x 3/8" [9.5mm]
self-tapping screw through each hole and back it out.
Apply a couple drops of thin CA glue to each hole to
harden the wood. When the glue has dried, install
the control horn onto the aileron using two #2 x 3/8"
[9.5mm] self-tapping screws.
Servo Horn
1/16"
[1.6mm]
FasLink
2-56 (.074")
Pushrod Wire
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4. Use tape or a small clamp to hold the aileron
in the neutral position. Make a mark on the pushrod
where it crosses the outer hole in the servo arm.
Make a 90° bend at the mark on the pushrod and
cut off the excess pushrod 1/4" [6mm] beyond the
bend. Attach the pushrod to the servo arm using a
nylon FasLink
™ . Thread the clevis up or down on the
pushrod as necessary to center the aileron with the
servo arm centered. When satisfi ed, apply a drop