turboprop

/terr"boh prop'/, n.

1. See turbo-propeller engine.

2. an airplane equipped with one or more turbo-propeller engines.

[1940-45; TURBO- + PROP³]

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Hybrid engine that provides jet thrust and also drives a propeller.

It is similar to the turbojet except that an added turbine, behind the combustion chamber, works through a shaft and speed-reducing gears to turn a propeller at the front of the engine. Because of improvements in turbojet design, the turboprop, which is less efficient at high speeds, lost much of its importance in the 1960s, though it is still used for relatively short-range aircraft.

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▪ engineering

also called  P Jet 

 hybrid engine that provides jet thrust and also drives a propeller. It is basically similar to a turbojet except that an added turbine, rearward of the combustion chamber, works through a shaft and speed-reducing gears to turn a propeller at the front of the engine.

      The first experimental turboprop aircraft, a modified Gloster Meteor fighter equipped with two Rolls-Royce Trent units, flew in 1945 in England. The first turboprop commercial airliner to enter scheduled service was the Vickers Type 701 Viscount, April 18, 1953.

      As a consequence of improvements in turbojet design, the turboprop—less efficient at high speeds—lost much of its importance in the 1960s, although it was retained for relatively short range aircraft.

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