On Altis all windmills are aligned to north. They are not affected by the direction of wind. In reality, windmills are automaticly aligned to the direction, where the wind is coming from.
The windmills are also not affected by the strength of the wind. If you set up the strength of the wind to 0, the windmills still spin. There is no change of spinning speed, if you set up the strength of wind to 100. In reality the windmills won't spin, if there is no wind and will spin really fast, if there is pretty hard wind.