Editing PolyFactory:Windmill (section)

=== Rotational power generation ===
Main purpose of the Windmill is to generate rotational force that can be used by other machines. The amount of it depends on multiple factors, such as:

# Amount of sails, with minimum being 2. It effects final stress capacity supported by the windmill.
# Height it is placed on (depending on dimension). It needs to be at least 5 blocks above the ground in Overworld to start rotating, through being higher gives better results. In The Nether, it needs to be around y=64. In The End dimension position doesn't matter. It effects final speed and stress capacity.
# The biome, with ocean biomes giving x1.3 and beaches and mountains x1.2 boost to both speed and stress capacity.
# Whenever it is raining, giving additional x1.1 boost to speed and stress capacity.

You can connect multiple windmills in parallel to increase total stress capacity available.