Waterwheel

A wheel with paddles designed to extract power from flowing water.

Undershot waterwheel

The water runs left to right and is controlled by the sluice gate. The wheel turns counter-clockwise.

Breast waterwheel

The water arrives at the wheel at roughly axle height and turns the wheel counter-clockwise.

Overshot waterwheel

The water arrives over the top of the wheel and turns the wheel clockwise.