propeller brake

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• propeller brake — A friction brake used on turboprop engines to prevent the propeller from windmilling in flight after it has been feathered and from rotating when the engine has been shut down. In a free turbine, it prevents prolonged windmilling when the… …   Aviation dictionary

• Brake specific fuel consumption — (BSFC) is a measure of an engine s efficiency. It is the rate of fuel consumption divided by the power produced. BSFC is specific for shaft engines such as reciprocating engine. The BSFC Calculation (in metric units) To calculate BSFC, use the… …   Wikipedia

• brake horsepower — The power delivered to the propeller shaft (main drive or main output) of an aircraft engine. It is the difference between the horsepower delivered by the engine and that consumed by friction. The actual horsepower received by the propeller of an …   Aviation dictionary

• propeller efficiency — The ratio of the thrust horsepower to the brake horsepower, or the ratio of the thrust power delivered to the engine to the engine power required to turn the propeller. On an average, 20% of the brake horsepower is lost because of frictional… …   Aviation dictionary

• brake drum — /ˈbreɪk drʌm/ (say brayk drum) noun the steel or cast iron drum attached to the wheel hub or propeller shaft of a motor vehicle, etc., against which the brake lining is forcefully applied to arrest its turning when the brake is operated …  

• Hand brake — In cars, the hand brake (also known as the emergency brake, e brake, park brake, slide stick or parking brake) is a latching brake usually used to keep the car stationary. Automobile e brakes usually consist of a cable (usually adjustable for… …   Wikipedia

• Water brake — A water brake is a type of fluid coupling used to absorb mechanical energy and is usually comprised of a turbine or propeller mounted in an enclosure filled with water. As the turbine or propeller turns, mechanical energy is transferred to the… …   Wikipedia

• Hydraulic propeller — Hydraulic Hy*drau lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; y dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock,… …   The Collaborative International Dictionary of English

• Hydraulic brake — Hydraulic Hy*drau lic, a. [F. hydraulique, L. hydraulicus, fr. Gr. ?, ?, a water organ; y dwr water + ? flute, pipe. See {Hydra}.] Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock,… …   The Collaborative International Dictionary of English

• equivalent brake horsepower/equivalent shaft horsepower — The sum of horsepower available at the propeller shaft in a piston/turboprop engine, measured as brake horsepower and equivalent power derived from jet thrust by applying a numerical factor to measure thrust. ESHP = SHP (shaft horsepower) +… …   Aviation dictionary

• fan brake — noun : a fan or propeller used to provide resistance for its driving mechanism (as an engine or a dynamometer for measuring power) …   Useful english dictionary