Great Planes Edge 540 EP ARF - GPMA1550 - Manual (Page 12)

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8. Trim the covering from the control horn slot in the left
elevator (both top and bottom) and insert a control horn into
the slot on the underside of the elevator. Press a control
horn backplate onto the control horn tab on top of the
elevator. Apply a few drops of medium CA glue to the control
horn and backplate to secure them in place. The control horn
tab can be trimmed fl ush with the backplate.
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9. Attach a control horn to the right side of the rudder in
the same manner.
INSTALL THE TAIL SERVOS & PUSHRODS
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1. Trim the covering from the elevator and rudder servo
bays on both sides of the fuselage as shown.
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2. Attach a 16" [400mm] servo extension to the elevator
and rudder servos. Use your radio system to center the
servos. Before installing the servos, test fi t double-sided
servo arms perpendicular to the tail servo cases. If the servo
arms do not fi t onto the servo splines perpendicular to the
servo cases, remove them from the servos and rotate 180°.
Decide which way fi ts best (closest to perpendicular) and cut
off the arms that aren’t used. Secure the servos in the servo
bays with the splines facing forward.
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3. Attach an adjustable clevis to the outer holes of the
rudder servo arm and rudder control horn. Attach the arm to