I read that excessive play in the control linkage causes poor autopilot performance. So I checked the linkage on my RV-12 by putting the roll servo in test mode and moved the flaperon by hand. The control stick moved whenever I moved the flaperon. That means that there is not much play in the control system. But wait, the roll servo was locked in test mode. Why wasn't the servo holding the flaperon still? So I watched the roll servo while moving the control sticks with my feet. The play is in the servo shaft. The shaft wobbles. This is not rotational movement or gear lash. The end of the servo shaft moves about 1/32" fore and aft without rotation.
Did I get a bad servo or are they all that way? If they are all that way, then I will try to fabricate a bearing to support the end of the servo shaft to keep it from wobbling.
Joe Gores
Did I get a bad servo or are they all that way? If they are all that way, then I will try to fabricate a bearing to support the end of the servo shaft to keep it from wobbling.
Joe Gores