13
Make sure your elevator servos are centered and mount your servo arms parallel to the hinge line.
Take some masking tape and tape the elevator counter balances to the stabilizers so that they are in a
center position.
Screw in your two HD ball links onto the counterclockwise ends of the 2.5” H9 push rods and screw the
other end into the control horn. Ensure everything is still centered. Don’t forget to add locknuts to the
4/40 bolts attaching the ball link to the arm.
Ensure aileron servos are centered and mount your arms parallel to the hinge line.
Be sure that you install the horns at the same height from the hinge line (see attached). By doing so you
will have very little servo matching to do afterwards.
Screw in four HD ball links onto the counterclockwise ends of the 2.5” H9 push rods and screw the
other end into the control horn. Ensure everything is still centered. Don’t forget to add locknuts to the
4/40 bolts, attaching the ball links to the arms.
Ensure your rudder servo is centered and mount
your rudder servo arm.
Two Futaba 9157 servos were used on our test
aircraft. You will need additional servo arms to
tie the two or three servos together as well as a
servo matching device.
