Alan Maurer Posted November 13 Report Posted November 13 Mooney People, In Ovation with G1000, I am constantly re trimming the rudder to keep the ball in the center , but it does not stay put. Anybody else have the same problem or possibly a reason. Thanks Everyone! Too bad there is no manual trim!!...just the electric trim! Alan N913ND
Ragsf15e Posted November 13 Report Posted November 13 9 hours ago, Alan Maurer said: Mooney People, In Ovation with G1000, I am constantly re trimming the rudder to keep the ball in the center , but it does not stay put. Anybody else have the same problem or possibly a reason. Thanks Everyone! Too bad there is no manual trim!!...just the electric trim! Alan N913ND You might need to define this issue a little more, because that is potentially normal depending on what you mean. Anytime you change engine power or speed, rudder trim will change. Obviously you need right rudder on takeoff at full power/low speed. But less at full power higher speed. In cruise, you might even need a little left rudder at high kias. In descent, again, left rudder. And then likely neutral rudder on final, slow and configured. Do you mean you have to keep changing it even at a constant speed and power setting?
Alan Maurer Posted November 13 Author Report Posted November 13 Yes...in cruise, with no power or altitude change the ball does not stay put in the center and every few minutes I have to trim it. Seems like it should stay trimmed. For takeoff I use the G1000 setting.....right rudder.
Rick Junkin Posted November 13 Report Posted November 13 45 minutes ago, Alan Maurer said: Yes...in cruise, with no power or altitude change the ball does not stay put in the center and every few minutes I have to trim it. Seems like it should stay trimmed. For takeoff I use the G1000 setting.....right rudder. Is this an emergent problem or has it always been this way? Are you always re-trimming in the same direction? Are you seeing the trim "drift" in smooth air? The first things that come to mind are either hysteresis/backlash or friction in the rudder control system. Have you looked at the condition and security of the pushrods and linkages? Were they lubricated recently? 1
MikeOH Posted November 13 Report Posted November 13 Okay, 'out of left field' comment: Which 'ball' are you referring to? The 'real' one in a turn-coordinator, or the 'synthetic' one in the Garmin? If the latter, maybe you have a 'software' problem? Is the plane actually skidding? I.e., what is your 'backside' feeling before you retrim?
Alan Maurer Posted November 13 Author Report Posted November 13 Trim using the Garmin PFD...Garmin not a real slip indicator. When needing a trim correction plane is slipping. Always feels correct with Garmin indicator centered. I will have Sarasota Avionics check the items mntioned. Thanks Everyone!! Alan
PT20J Posted November 14 Report Posted November 14 There is a interconnect between the ailerons and the rudder so any aileron displacement will also affect the rudder. No idea if this is what's going on but if the airplane is slipping it would indicate aileron displacement. I might check the rigging. 1
MikeOH Posted November 14 Report Posted November 14 Good point! Is the plane skidding or actually slipping?
rgpilot Posted November 15 Report Posted November 15 There is a bulletin about this problem: SERVICE INSTRUCTION SIM20-124A 4
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