After several days of testing with ASE I know what the S-turns will look like and when they will occur on my system. It is not because of the autopilot. The S-turns will occur every time the Shift-Z ("Z") and the winds shown on the MAP/FMC ("FMC") disagree. As long as the wind shift is the same in Z and FMC there are not any S-turns. For example if Z shows winds of 270/30 and FMC shows winds of 180/20 the S-turns will start. It seems that once Z and FMC get out of sync, only clearing the weather with FSUIPC will stop them. I am not sure what the correlation between Z and FMC is, maybe Jim has an insight? I have flown three flight totaling 25 hours in real time using B572, B611, and B625. With B572/611 the winds started out ok, but once at my cruise altitude the winds were correct (270/35) for about 30 minutes, then changed 180 degrees to 090/30 and never changed for 6 hours. The winds corrected when I restarted ASE, but would never update. I attempted to correct the winds using WX Config but kept getting an error message "Unhandled exception has occurred in your application. If you click Continue, the application will ignore this ....". Under Details it talks about "System IndexOutOfRangeException:".What I would like to be able to do is insert the Average Winds from the Briefing to my winds aloft. At least on my long flights where winds and fuel are critical my flight would be manageable. Is there a way to force ASE to update FSX without restarting it? Bill Bridges

Hi Bill,The way to refresh things is to use the Refresh icon in ASE. Now to refresh FSX you can use the clear weather command in FSUIPC, then use the Refresh button in ASE. That will refresh both. Internally, we know the cause of the S turns, but the fix is out of our hands, so we continue to work around things.

Hi Bill,The way to refresh things is to use the Refresh icon in ASE. Now to refresh FSX you can use the clear weather command in FSUIPC, then use the Refresh button in ASE. That will refresh both. Internally, we know the cause of the S turns, but the fix is out of our hands, so we continue to work around things.

Jim,Just an update. I am running B611 in DWC without FSUIPC smoothing. This seems to be working best for me so far. The winds are good and the S-turns are noticable, but tolerable. Since things are stable I am reluctant to upgrade to B629. What do you think?Bill Bridges

Jim,Just an update. I am running B611 in DWC without FSUIPC smoothing. This seems to be working best for me so far. The winds are good and the S-turns are noticable, but tolerable. Since things are stable I am reluctant to upgrade to B629. What do you think?Bill Bridges

If you are using registered FSUIPC you can enable wind smoothing which will all but eliminate the S turns. There are other posts on this forum with details about how many users overcome this issue. I am using build 629 and the S turns are the same as they were in earlier versions, which is pretty much none if you have DWC on, FSUIPC suppress turbulence, and the FSX turbulence scale set to .3 to .8 depending on taste.Rob.

I tried several things to minimise the S-turns. I changed the values in fsx.cfg and FSUIPC4.ini as per the Active Sky Enhanced manual. That helped a bit. I tried switching DWC mode off, but then the destination weather didn't update properly. I tried FSUIPC wind smoothing, without any luck. Recently, I decided to only use the values I mentioned before and to tick the boxes 'Allow changes to FS own weather' and 'Allow gusts in upper winds' on the winds page in FSUIPC4. I haven't noticed any S-turns anymore.

I tried several things to minimise the S-turns. I changed the values in fsx.cfg and FSUIPC4.ini as per the Active Sky Enhanced manual. That helped a bit. I tried switching DWC mode off, but then the destination weather didn't update properly. I tried FSUIPC wind smoothing, without any luck. Recently, I decided to only use the values I mentioned before and to tick the boxes 'Allow changes to FS own weather' and 'Allow gusts in upper winds' on the winds page in FSUIPC4. I haven't noticed any S-turns anymore.

I did experience s-turns a lot in the Level-D. In my particular case, checking the Supress turbulence option in FSUIPC completely solved the problem. (by the way, turbulence does NOT get supressed by doing this) so its actually very weird, but hey, it solves the problem.

In the ASE manual there are two tweaks to minimise the S-turns and both tweaks are modifications of turbulence settings. So, indeed, if turbulence is suppressed completely, the S-turns shouldn't be an issue anymore, I experienced that too. Do you also have the boxes 'Allow changes to FS own weather' and 'Allow gusts in upper winds' ticked? What do you mean by ' turbulence does NOT get supressed by doing this'? Checking 'Suppress turbulence' really eliminates the S-turns and differences between winds in [shift]+[Z] and the aircraft's displays.

I tried several things to minimise the S-turns. I changed the values in fsx.cfg and FSUIPC4.ini as per the Active Sky Enhanced manual. That helped a bit. I tried switching DWC mode off, but then the destination weather didn't update properly. I tried FSUIPC wind smoothing, without any luck. Recently, I decided to only use the values I mentioned before and to tick the boxes 'Allow changes to FS own weather' and 'Allow gusts in upper winds' on the winds page in FSUIPC4. I haven't noticed any S-turns anymore.

Which AC are you flying that gets affected with the S-Turn syndrome?