first of all i am sorry if this has already been posted on the forum. when i fly some planes on fs2004 eg meljet 777, i notice that the plane never stays level when i increase the fs speed to 16 times the normal. it normally seems to fly up and down without me touching the controls. the question is will this problem be in the pmdg 747.thanks r.king

I think yes.It's mathematics: when you increase simulation speed, you don't increase the calculation steps along with the speed.So say that FS makes 100 calculations per second, and in that time it's at 1x.Now if you go 16x it always makes 100 calculations but this time these 100 calcs have to cope with 16 times the stimulus and interactions then before.Result is less precision and less reactiveness.Maybe they've come up with a way to limit this but even the 737ng is affected by this although very slightly.