An interesting problem

[WarpD]

Ok... here's an interesting quandry.

Flight dynamics set up and working flawlessly in FS9... has a small issue in FSX that I can't explain.

In FSX the aircraft wants to 'porpoise' at higher altitudes, but not at lower ones. It exhibits none of this behavior in FS9 whatsoever.

Any thoughts?

[Wozza]

Hi
if by porpoise do you mean a very slow up and down movement, or more of a pulse which gets faster with speed? if its the later up the pitch moe number in the aircraft.cfg a tad.
If its very slow up down movement check that trim isnt moving back and forth due to a spiky key assignment or the auto pilot is on.
Wozza

[WarpD]

It's a slow movement and I believe the problem's been solved.

It was an error compounded by another error which in FS9 apparently has no effect, but in FSX causes the behavior.