Propeller speeds also varied during the flight ... did away with the cam and pushrods and instead connected a flexible drive shaft to the engine’s camshaft. This carried the rotation up to ...

By attaching an electric motor with a push prop to the back of the car, [Kryzer] avoids the need for any kind of drive system or gearing. Steering works normally thanks to some scratch-built ...

Konrad Marine has put stern drives on many small crabbers and other types of fishing vessels. The company’s dual prop 680B ...

Scientists say they have designed a propeller system that can replace electrical and diesel-operated engines currently used to drive ferries plowing through the seas on pre-determined routes.

The airframe and engines must withstand these conditions. High-speed propellers face challenges in achieving supersonic flow ...