54H60 propeller on a US Navy EP-3E Orion's number four engine as part of pre-flight checks. The Orion is an anti-submarine warfare aircraft]]A propeller is essentially a type of fan which transmits power by converting rotational motion into thrust for propulsion of a vehicle such as an aircraft, ship, or submarine through a fluid such as water or air, by rotating two or more twisted blades about a central shaft, in a manner analogous to rotating a screw through a solid. The blades of a propeller act as rotating wings (the blades of a propeller are in fact wings or airfoils), and produce force through application of both Bernoulli's principle and Newton's third law, generating a difference in pressure between the forward and rear surfaces of the airfoil-shaped blades and by accelerating a mass of air rearward. History The principle employed in using a screw propeller is used in sculling. It is part of the skill of propelling a Veneti

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