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A self-feathering propeller is not more efficient than a fixed bladed prop, as neither type can adopt an optimal blade angle. Exceptions are the Bruntons Autoprop, Darglow FeatherStream, and the V-Prop, all of which are not merely folding propellers, but are self-actuating variable-pitch propellers. On a boat, most propellers are much less ...
Ted Irwin's personal Irwin 44 Bruntons Autoprop fitted to an Irwin 44. Irwin was born in Elizabeth, New Jersey in 1940 and developed a passion for sailing at an early age. He built his own Moth and went on to sail it to win the class North American and world championships.
A ferry is a boat that transports passengers, and occasionally vehicles and cargo, across a body of water. A small passenger ferry with multiple stops, like those in Venice, Italy, is sometimes referred to as a water taxi or water bus.