Great Planes Matt Chapman Eagle 580 46/EP ARF - GPMA1281 - Manual (Page 11)

11
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3. Cut three arms from two four-armed servo arms (a long
servo arm will be needed on the elevator servo to achieve
3D control throw). Center the elevator and rudder servos
with your radio system and install them onto the servos in
the orientation shown with the servo arm screws. Enlarge
the outer holes of each servo arm with a 5/64" [2mm] drill bit.
Install the elevator and rudder servos into the servo tray as
shown using the hardware supplied with the servos. Before
drilling the mounting holes, test fi t your throttle servo (if
applicable) to confi rm there is enough space for it next to the
elevator servo. Be sure to harden the screw holes with thin
CA as was done with the aileron servos.
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4. Thread a nylon clevis and silicone clevis retainer onto a 2-56
x 36" [914mm] pushrod 20 complete turns. Slide the pushrod
through the rudder pushrod exit slot in the fuselage and connect
it to the second inner hole in the rudder control horn.
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5. With the rudder in the neutral position and the rudder
servo arm perpendicular to the servo case, mark where the
pushrod crosses the outer hole of the servo arm. As you
did with the aileron pushrods, make a 90° bend at the mark
and cut off the excess pushrod 1/4" [6mm] beyond the bend.
Secure the pushrod to the servo arm with a nylon FasLink.
Make any adjustments necessary to the nylon clevis so that
the rudder is properly centered and slide the silicone clevis
retainer to the end of the clevis. Cut off the tip of the rudder
control horn so it does not interfere with the elevator.
Aft Rudder Servo Installation
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A. Sand and clean a 36" [914mm] pushrod with
denatured alcohol. Lightly coat 4" [102mm] of the pushrod
beyond the threaded end with epoxy. Slide the included
piece of carbon fi ber tube over the pushrod, positioning
it 1/4" [6mm] beyond the threaded end. Wipe away any
excess epoxy with denatured alcohol.