When the airplane is flying at a cruising altitude with the autothrottle engaged I find the power settings are frequently unstable. For a period of some minutes all three N1 values range up and down together by as much as 10% if not somewhat more. The N2 and fuel consumption values follow as do the graphically displayed throttles. Much of the time the power is quite solid (N1 of 90% with the GE engines and 79% with the PW engines), but then for some reason it becomes unstable. It appears to occur only when the autothrottle is engaged. I would appreciate knowing whether this is a common problem and, if so, whether there is a fix. Peter Lowry.

I think the most common reason for the throttle movement in the simulation is wind speed variation. If you try a cruise in clear weather (no weather) there will still be a minor variation in throttle, and I don't know what causes that but large movements are probably the poor wx engine in MSFS. The fix is a registered copy of FSUIPC, which offers wind speed/direction pressure and temperature smoothing. Turn off turbulence, MSFS doesn't do this realistically.

Thanks for your comment Dan. I have all turbulence turned off and I have tried to fix things with FSUIPC smoothing. Perhaps I just have to work with it some more. Any suggestions about the setting for wind smoothing might be helpful. Peter.

My settings:

Thanks again. I use Active Sky (Evolution) which has its own wind smoothing and some instruction on how to address weather problems for more sensitive aircraft like the MD-11, but that does not seem to overcome the instability in my power settings. I will try your FSUIPC settings and see what happens. Peter.

My settings:

Dan,I was searching your wind smoothing set. Unfortunately they removed the attachments. Is it possible if you can load the attachments again.It was very helpful.ThanksThanks