Install The Tail Servos & Pushrods - GREAT PLANES Yak 54 36 ARF Instruction Manual

INSTALL THE TAIL SERVOS &
PUSHRODS
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1. Trim the covering from the forward lightening hole in the
cockpit floor as shown. Also trim the covering from the
pushrod exit slots on both sides of the fuselage.
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2. Glue or install the elevator and rudder servos with the
screws included with the radio system to the servo tray with
the splines facing forward. Use your radio system to center
the servos.
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3. Attach adjustable clevises to the elevator and rudder
control horns in the second hole as shown.
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4. As you did with the ailerons, test fit the double-sided
servo arms perpendicular to the servo cases. If the servo
arm does not fit onto the servo spline perpendicular to the
servo case, remove it from the servo and rotate it 180°.
Decide which way fits best (closest to perpendicular) and cut
off the arm that isn't used. Attach an adjustable clevis to the
outer holes of both arms and attach the arms to the servos
(in the directions shown) with the servo arm screws .
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5. Slide the 5/64" x 18" [2mm x 462mm] elevator pushrod
through the pushrod exit slot in the fuselage. Be sure that the
pushrod passes through the pushrod holes in the fuselage
formers. Insert the forward end into the clevis attached to the
elevator servo, and the aft end into the clevis attached to the
elevator control horn. Use a small clamp or tape to hold the
elevator in the neutral position. Glue the pushrod to the clevis
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