Originally Posted by
timfountain
Wind and direction of wind. They free-wheel without power. Even a big turbine and be turned by hand....
I did wonder that but the turn rate was pretty consistent. Usually breezes come and go.
Originally Posted by
pseudoswede
Were they both facing the same direction? Was it breezy outside?
Yes, and don't know. What surprised me was that it didn't seem to take more than a few moments (I was distracted by a G&T) for the ET engine to have reversed direction and reached a constant turn rate.