The Lifeboat News
[ Post a Response | The Lifeboat News ]
Not sure what you mean by "windmilling" but suspect you're talking about the wagon wheel effect
That's an optical illusion where the apparent rotation of the spoked object appears to rotate differently (speed and direction) from the reality.
The rolling shutter causes skewing of objects. It can be seen in car/bike races where vertical structures (stands, flagpoles) appear as diagonals.