- A propeller whose blades have been rotated so that the leading and trailing edges are nearly parallel with the aircraft flight path to stop or minimize drag and engine rotation. Normally used to indicate the shutdown of a reciprocating or turboprop engine because of a malfunction. See also feather (ii).When the propeller feathers, the blades are about 90° to the plane of rotation.
Aviation dictionary. 2014.
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propeller blade angle — Except when feathered, when the angle is approximately 90°, the acute angle between the chord of a propeller and the plane of the rotation. Also called pitch. See blade angle. See also propeller synchrophasing … Aviation dictionary
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
propeller pitch — The acute angle between the chord of a propeller and a plane perpendicular to the axis of rotation. The three main pitch angles are coarse, fine, and feathered … Aviation dictionary
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jet engine — an engine, as an aircraft engine, that produces forward motion by the rearward exhaust of a jet of fluid or heated air and gases. Also called jet, jet motor. [1940 45] * * * Any of a class of internal combustion engines that propel aircraft by… … Universalium
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feather — I. noun Etymology: Middle English fether, from Old English; akin to Old High German federa wing, Latin petere to go to, seek, Greek petesthai to fly, piptein to fall, pteron wing Date: before 12th century 1. a. any of the light horny epidermal… … New Collegiate Dictionary
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airplane — /air playn /, n. 1. a heavier than air aircraft kept aloft by the upward thrust exerted by the passing air on its fixed wings and driven by propellers, jet propulsion, etc. 2. any similar heavier than air aircraft, as a glider or helicopter. Also … Universalium