Install The Rudder Servos In The Aft Position - GREAT PLANES Perfomance Series Sukhoi SU-31 1.60 ARF Instruction Manual

the forward rudder servo. Insert the two rudder servo joiner
rods (included with the kit) through the screw-lock pushrod
connectors as shown and tighten all the 4-40 SHCS.
❏
11. Connect the other two clevis ends with the brass
couplers installed onto the outer holes of the aft rudder servo
extension. Check to be sure that the elevator servo wires are
not entangled in the rudder pull-pull cables. Slide a swage
onto the ends of the pull-pull cables inside the fuse. Move the
rudder to the neutral position and feed the ends of the cables
through the holes in the brass couplers. The pull-pull cables
will cross each other inside the fuse. With both pull-pull
cables having tension and the rudder in the neutral position,
crimp the swages onto the cable ends to secure them as
you did in step 4. You can fi ne-tune the tension on the lines
by threading the clevises up or down on the couplers until
satisfi ed. Then, tighten the 4-40 nuts against the clevises
and slide the silicone clevis retainers over the clevises. Be
sure that the rudder is in the neutral position when the cables
are both tight and the rudder servos are perpendicular to the
fuse. Note: If the rudder servo extensions contact the throttle
servo when using the forward radio tray, move the throttle
servo all the way to the side of the tray and fl ip the position
of the throttle servo arm.

Install the Rudder Servos in the Aft Position

This is the recommended installation for gas engines.
❏
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.
❏
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 degrees). 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.
❏
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 fuse
and install the servos into the servo bays with the splines
34