Geography, Landscape and Mills
There are 3 basic types of waterwheels: horizontal, undershot, and overshot. Horizontal waterwheels revolve in the horizontal plane (which means, confusingly, their axles are vertical) much like a top-load washing machine. The undershot and overshot waterwheels are both types of vertical waterwheels, which rotate like a Ferris wheel. The undershot wheel's lower blades or paddles dip into the ...