Great Planes Edge 540 1.60-43cc Performance Series ARF - GPMA1414 - Manual (Page 26)

26
Install the Throttle Servo (gas)
Since most gas engine installations will require the rudder
servos to be installed in the aft location to minimize
additional ballast when balancing the model, the throttle
servo can be installed into one of the unused forward
rudder servo bays. If you determine that your engine
installation requires the rudder servos to be installed in
the forward position, an alternative throttle servo tray is
provided. The tray can be glued or screwed on either side
of the forward rudder servo bays. The additional pieces
shown in the picture should be glued to the underside of
tray at the ends of the throttle servo opening for the servo
mounting screws. The remainder of the throttle servo
installation steps will still apply.
o 1. Place your throttle servo into the forward rudder servo
bay as shown. Drill 1/16" [1.6mm] holes to mount the servo.
Install the servo into the servo bay using the hardware
included with the servo. Be sure to apply thin CA to the holes
to harden the wood. Center the servo with your radio system
(depending on the location of the receiver, a 6" [152mm] servo
extension may be needed). Attach a servo arm to the servo,
securing it with the servo arm screw. The servo arm should
be on the same side as the carburetor on your engine.
o 2. Determine the location of the throttle pushrod based on
the position of the throttle arm on the carburetor. Drill a hole
through the firewall for the throttle pushrod using a long, 3/16"
[4.8mm] drill bit. If you do not have a long drill bit, you may need
to temporarily remove the engine in order to drill the hole.
o 3. Insert the outer pushrod tube through the hole in the
firewall and slide it through the formers in the fuselage
toward the servo arm on your throttle servo. Mark and cut
the pushrod tube to the necessary length. Use sandpaper
to scuff the tube where it will be glued to the firewall and the
throttle pushrod tube supports. Reinstall the tube into the
plane and glue the forward end to the firewall. Long pushrod
supports are provided and can be cut to length and used
where needed. Clip the short throttle pushrod tube support
near the aft end of the tube. Use the pushrod tube support
to align the outer pushrod tube level with the throttle servo
arm. Glue the pushrod tube support to the fuselage former
as shown and glue the tube to the support.