GREAT PLANES Rapture 40 Instruction Manual page 32

2. Thread a nylon clevis twenty full turns onto the threaded
end of a 36" [910mm] wire pushrod. Slip a silicone retainer
over the clevis, then connect the clevis to the outer hole in a
control horn. Make another assembly the same way.
3. Cut both pushrods to a length of 26" [660mm]. Guide
the pushrods up through the tubes in the fuselage. Position
the rudder control horn on the rudder as shown. Note that
the clevis holes in the horn should be positioned over the
pivot point (leading edge) of the rudder. Use a ballpoint pen
or a piece of leftover pushrod to mark the location of the two
mounting holes in the horn on the rudder.
4. Drill 3/32" [2.4mm] holes at the marks. Mount the horn
to the rudder with two #2 x 1/2" [13mm] screws and the
nylon mounting plate.
5. Mount the elevator control horn to the elevator the
same way. Note that the horn must be as close to the edge
of the elevator as possible so the screw does not interfere
with the joiner wire.
6. Place the elevator, rudder and throttle servos on the
servo rails in the fuselage. Make three one-arm servo arms
by cutting off the unused arms. If using Futaba servos, use
the shorter, six-arm servo arms instead of the four-arm
servo arms. If using another brand of servos, the arms must
be short enough so they do not interfere with the other
servos. Enlarge the holes in only the rudder and elevator
servo arms with a 5/64" [2mm] drill or a Hobbico Servo Arm
Drill. Install the arms on the servos.
7. Hold the rudder pushrod over the outer hole in the
rudder servo arm. Push or pull on the pushrod to center the
rudder. Use a fine-point felt-tip pen to mark the pushrod
where it crosses the hole in the arm.
8. Disconnect the rudder pushrod from the rudder control
horn. Make a 90° bend in the pushrod at the mark. Slip a
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