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Propeller — 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 mass such as water or air, by rotating two or more twisted… … Wikipedia
Napier & Son — The 1907 Napier 60 hp D. Napier Son Limited was a British engine and pre Great War (the brass era ) automobile manufacturer and one of the most important aircraft engine manufacturers in the early to mid 20th century. Their post First World… … Wikipedia

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