GREAT PLANES SU-31 Instruction Manual page 7

Almost-ready-to-fly electric 3d aerobat
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5. Locate two double-sided servo arms that fit the output
splines of your aileron servos. Also, locate four adjustable
clevises. If necessary, remove the flashing from the top of
the clevises using some sandpaper. Be certain that the
flashing is fully removed, or it will be very difficult to install
the clevises.
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6. Temporarily connect the aileron servos and battery
pack to your radio. Center the servos and trim levers on the
transmitter. Test fit the double-sided servo arms parallel to
the aileron hinge line. Decide which way fits best (closest to
parallel) and cut off the arm that isn't used. The remaining
arm should point toward the wing tip. Be sure to make a left
and right servo arm.
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7. Fit an adjustable clevis onto both 2 x 100mm aileron
pushrods.
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8. Trim the mounting tabs on two control horns so that
they are 1/4" [6.4mm] long. Test fit the control horn into the
control horn slot in the wing. Check to be sure that the horn
holes sit over the hinge line. If they do not, use a hobby knife
to enlarge the slot so that the horn holes sit over the hinge
line. Coat the control horn mounting tabs with medium CA
and press them into the slots in the ailerons.
7

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