free turbine

A separate turbine that is not mechanically connected to the remainder of the engine, as for example in some turboprop engines that drive the propeller. Arrangements have to be made for braking the propeller, to prevent it from spinning in a wind when the aircraft is at rest, and for shutting off the fuel when the power turbine is unloaded. See also free power turbine.
Free turbine in a turboprop engine.

Aviation dictionary. 2014.

Look at other dictionaries:

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  • turbine — /terr bin, buyn/, n. any of various machines having a rotor, usually with vanes or blades, driven by the pressure, momentum, or reactive thrust of a moving fluid, as steam, water, hot gases, or air, either occurring in the form of free jets or as …   Universalium

  • Turbine — A turbine is a rotary engine that extracts energy from a fluid flow. Claude Burdin (1788 1873) coined the term from the Latin turbo , or vortex, during an 1828 engineering competition. Benoit Fourneyron (1802 1867), a student of Claude Burdin,… …   Wikipedia

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  • turbine — /ˈtɜbaɪn / (say terbuyn), Originally US / bən/ (say buhn) noun 1. any of a class of hydraulic motors in which a vaned wheel or runner is made to revolve by the impingement of a free jet of fluid (impulse turbine or action turbine) or by the… …   Australian English dictionary

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  • turbine — tur•bine [[t]ˈtɜr bɪn, baɪn[/t]] n. mac any of various machines having a rotor, usu. with vanes or blades, driven by the pressure or thrust of a moving fluid, as steam, water, hot gases, or air, either in the form of free jets or as a fluid… …   From formal English to slang

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