tractor configuration

An aircraft constructed with a tractor configuration has the engine mounted with the propeller facing forwards such that the aircraft is "pulled" through the air, as opposed to the pusher configuration in which the propeller faces backwards and the aircraft is "pushed" through the air.In the early years of powered aviation both tractor and pusher designs were common. However, by the mid-point of the First World War, interests in pushers declined and the tractor configuration dominated such that today all propeller-driven aircraft are assumed to be tractors unless stated otherwise.
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