Loading the wheel...
Turn it
Rotate by any number of degrees, go to an angle, or keep stepping one paddle at a time. The wheel eases in and stops exactly where you asked.
Let it run
Press Free spin, Flick or Reverse, drag the wheel to throw it, then turn up Friction. Tick Pour water and the water alone turns it.
Written in xTalk
The whole demo is one OXT-Beyond stack in xTalk Script. Box2Dxt runs the physics, and every graphic in the group redraws from the one body's angle.