June 16, 201312 yr Hi, Every so often, when I'm flying, the PMDG 737NGX will just start to trim itself, without autopilot engaged. Then I'll basically have to surcome to what ever setting it decides on and then land with the joystick pulled all the out. Once getting on the ground the pmdg will then continue to trim itself until it can no longer do so. Any ideas? Drives me nuts and makes the flight so unenjoyable as I hand fly.
June 16, 201312 yr It's a feature of the 737; it's trying to trim to maintain the current speed. Moving the controls in the opposite direction, or trimming yourself, will cancel the auto-trim for a period of time (5-seconds? can't remember exactly). It's in the FCOM somewhere... Jordan Forrest
June 16, 201312 yr Author Is this true even if auto throttle is off? Seems super strange. Can I turn it off?
June 16, 201312 yr Maybe you have a button on your joystick mapped to the function or maybe a key that you're unware of. Gavin Price
June 16, 201312 yr Author If I did it would have to be really faulty because its really constant trimming. The fact that the trim goes crazy when I land tends to make me think this is a PMDG bug or 737 NGX feature... although I can't imagine this being intended functionality as: a - it doesn't consistently happen b - when it does, it always results in me landing the plane horribly. If I would center the yoke at that point the plane would nose dive I'm going to try to disconnect controls and reboot LINDA next time.
June 17, 201312 yr Commercial Member a - it doesn't consistently happen If you have a hardware trim axis, make sure you're centering it before handing things over to the autopilot. Good call to try to disconnect the hardware next time it happens. Kyle Rodgers
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