Great Planes Edge 540 1.60-43cc Performance Series ARF - GPMA1414 - Manual (Page 36)

36
Install the Rudder Servos in the
Aft position
RECOMMENDED INSTALLATION FOR gAS ENgINES
o 1. Trim the covering from the aft rudder servo bays
leaving 1/8" [3mm] around the opening. Use a trim iron to
seal down the covering around the edges of the servo bays.
Temporarily unhooking one side of the elevator pushrods
may be necessary.
o 2. Locate the plywood mounting plates beneath the
covering on both sides of the rudder. Place a heavy-duty
nylon control horn on each side of the rudder, positioning
them as shown. To avoid putting stress on the clevis pins, tilt
the control horns at a slight downward angle (approximately
2° to 3°). Mark the location for the screw holes. Drill through
the marks you made with a 3/32" [2.4mm] drill bit.
Be sure
you are drilling through the plate only! Do not drill all
the way through the rudder. Using a #4 x 5/8" [16mm] self-
tapping screw, install and then remove a screw into each of
the holes. Harden the holes with thin CA. Install the control
horns with eight #4 x 5/8" [16mm] self-tapping screws.
o 3. Attach a 36" [914mm] servo extension to each rudder
servo. Secure the servo extensions with the included heat-
shrink tubing. Feed the servo extensions through the fuselage
and install the servos into the servo bays with the splines
facing forward using the mounting hardware included with the
servos. Be sure to harden the servo mounting screws with
thin CA. Attach the servo arms pointing down as shown.
o 4. Assemble the rudder pushrods using two .095" x 12"
[2.4mm x 305mm] pushrod wires threaded on one end, two
4-40 clevises, two 4-40 nuts, two solder clevises, and four
silicone clevis retainers. Just as you did with the aileron and
elevator pushrods, mark and cut the pushrods to length,
solder the clevises to the pushrods, and attach the pushrods
to the elevators, securing the clevises with silicone clevis
retainers. Be sure to use threadlocking compound on the
pushrod threads.