Paddle Wheel

A propelling wheel suspended and revolving at the side or stern of a vessel, its shaft being above the water and perpendicular to the vertical fore-and-aft plane of the vessel. It is provided with floats or buckets, secured at intervals around the circumference, only a few of which are in the water at the same time.

Radial Wheel. In this arrangement the buckets are secured rigidly to the arms of the wheel and the planes of their faces are practically radial planes.

Feathering Wheel. In this arrangement the buckets are supported at their ends on gudgeons or journals, and controlled by a mechanism which holds them with the plane of their faces practically perpendicular to the surface of the water during the time they are in the water.