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Date:  12-29-2018
Number of Hours:  3.00
Manual Reference:  
Brief Description:  Configured autopilot servos

We have been having a problem with the autopilot servos not configuring. The servos would chatter and not move the controls. Somewhere there was too much resistance to the controls moving. I had moved the servo arm to the second hole which provides a bit more torque but that had nof affect. It has been obvious to us that the controls needed to be loosened up in roll as it is tight. So, first we removed the bolt from the front of the torque tube and removed the bushing. That improved the situation somewhat but not enough. We replaced the bushing and bolt but did not tighten the nut all the way. We felt that was flatteng the tube when the nut is too tight. Next, Deano loosened all the nuts in the flaperon arms and that had a significant effect. The roll improved and moved smoothly. We performed the autopilot servo configuration and it passed successfully. The autopilot test also passed. We went ahead and retensioned the elevator and rudder cables with a tension meter. The meter was intermittant and we did not trust its readings. With the elevator cables tensioned to 25 or so pounds the roll control became tight again. Not sure why exactly but every time we put right roll in, after releasing the stick it returned to center. Left roll stayed where it was when released. So, we removed some tension from the elevator cables and the stick response loosened and returned to smooth. We scratched our heads and will do some research on this problem.
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Tensioning cables

Tensioning cables

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Rudder cable after tensioning

Rudder cable after tensioning

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