propeller


propeller

Device with a central hub and radiating blades placed so that each forms part of a helical (spiral) surface, used to propel a vehicle such as a ship or airplane. By its rotation in water or air, the propeller produces thrust on the blades, which gives forward motion to the vehicle.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on propeller, visit Britannica.com.

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