a propeller consisting of a horizontal disc carrying a number of vertical blades uniformly spaced around its circumference. The disc is driven so as to rotate about a vertical axis. During its travel around the disc axis, each blade is caused to tilt cyclically by a mechanical linkage, and is phased so that a mean fluid lift force is generated.
Rudder propellers and Voith-Schneider equipment
Where remote control of rudder and Voith-Schneider propellers is electrical, hydraulic or pneumatic there must be two independent control systems between the steering station and the propulsion installation.
