An operation in which the propeller blades move to the lowest pitch from the high-pitch angle consequent to feathering. This reduction of the angle of the blades’ aerodynamic forces unloads the engine and causes the propeller to rotate faster or, if there is no engine power, causes the propeller to autorotate, thus increasing RPM. See propeller pitch.

Aviation dictionary. 2014.

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Look at other dictionaries:

  • Unfeather — Un*feath er, v. t. [1st pref. un + feather.] To deprive of feathers; to strip. [R.] [1913 Webster] …   The Collaborative International Dictionary of English

  • unfeather — un·feather …   English syllables

  • unfeather — “+ transitive verb Etymology: Middle English unfetheren, from un (II) + fetheren to feather : to deprive (as a bird) of feathers : pluck, deplume, strip …   Useful english dictionary

  • Capital Airlines Flight 20 — Infobox Airliner accident|name=Capital Airlines Flight 20 Date=January 18 1960 Type=Engine failure, loss of control Site=near Charles City, Virginia Fatalities=50 Injuries=0 Aircraft Type=Vickers 745D Viscount Operator=Capital Airlines Tail… …   Wikipedia

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