Why is it that if there are 2 windmills next two each other, sometimes one wont be spinning, or spinning at a?

Question

we have a few wind farms around here and i always wonder....do the slow pokes need some WD-40? ;)

Answer 1

that seems to be the case at several windmills on farms near our house. The owners don't really care at what pace they spin as long as they do keep moving from the wind. Maintenance is only performed when it comes to a stop in the face of constant wind.