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Hirgab

Losing altitude when increasing simulation rate

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I am not sure why, but when I fly the PMDG 747 and increase my acceleration rate, the auto-pilot can't maintain the set altitude. Does this happen to anyone else and can it be remedied?Thanks.

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How much are you accelerating time? I've noticed some dips in rough weather at 4X, and I imagine any faster would make it very pronounced. I'm talking maybe +/- 50 feet. If the oscillation is accelerated I imagine that would increase by a lot. When I do speed things up once in a while, I never run faster than 4X due to AI disappearing. Basically I think it boils down to accel. rate and how sensitive/powerful the autopilot is.


-Jeremy

The Ozark Dogfighter

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In the first "chapter" of the most excellent manual (PMDG 747‐400X ‐ AOM, Revision – 26SEP07) which comes with the 747-400 for FSX, there is a section on page 0-39 called "Time Acceleration Limit."The answer is there. The "Cliff's Notes" version: You can't use too high of a time-acceleration value or the autopilot won't function properly. Your manual will instruct you on what that limitation is.


Jeff Bea

I am an avid globetrotter with my trusty Lufthansa B777F, Polar Air Cargo B744F, and Atlas Air B748F.

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