51
8. If the elevator does not move far enough, either move the
pushrod out farther on the servo horn, or move the clevis in
farther on the elevator control horn.
9. If the elevator moves too much, either move the pushrod in
on the servo horn, or move the clevis out farther on the elevator
control horn.
Rudder/Nose Gear
10. With the rudder servo horn in its neutral (electrical 0)
position, adjust the clevis, if necessary, until the rudder is in its
neutral position (no left or right). Check to make sure the rudder
trim lever on the transmitter is centered.
11. With the rudder and rudder servo in their neutral positions,
adjust the nose gear so it (the wheel) is pointing directly forward
so that with no rudder input (left or right), the aircraft will track
straight ahead on the ground.
12. With the radio system turned on, move the rudder stick (the
left stick) to the right. The rudder should move to the left
(remember, aircraft orientation is as if you are sitting in the
cockpit). The rudder should move approximately 7/8′′,
measured at the trailing edge of the rudder.
13. If the rudder moves right, switch the rudder servo reversing
switch on the transmitter.
14. If the rudder doesn’t move far enough, either move the
pushrod out farther on the servo horn, or move the clevis in on
the rudder control horn. If the rudder moves too much, either
move the pushrod in on the servo horn or out on the rudder
control horn.
15. The nose wheel should rotate the same direction as the
rudder.
Throttle
16. Before fine tuning your throttle linkage, you need to
(1) disconnect the clevis to the throttle arm of the carburetor to
prevent overtravel, and then (2) electrically zero the throttle
servo, if it hasn’t been done. Remove the throttle servo horn from
the throttle servo, but keep the throttle pushrod connected to the
horn. We will reconnect the servo horn in Step 18 of this section.
17. Move the throttle stick (left, positionable stick on most
transmitters) all the way down to the idle position, and move the
throttle trim lever on the transmitter all the way down.
CONTINUED
Section 19: Fine Tuning the Control Linkages
7/8′′
Elevator/Aileron
Stick
Throttle/Rudder
Stick
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