The rotation of the blades of a helicopter driven solely by the action of ascending air

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  • Autorotation — ist das nur durch Luftströmung (Fahrtwind) erzeugte freie Rotieren eines Hubschrauberrotors oder Flugkörpers. Beim Rotor eines Drehflügelflugzeugs setzen die Rotorblätter die Energie des Luftstroms dabei in dynamischen Auftrieb um, vergleichbar… …   Deutsch Wikipedia

  • autorotation — ● autorotation nom féminin Mode de fonctionnement d un rotor d hélicoptère dont le système d entraînement mécanique ou par réaction n agit plus …   Encyclopédie Universelle

  • Autorotation — Autorotation,   Selbstdrehung, Luftfahrt: 1) Flugzustand eines Hubschraubers, der bei Triebwerkausfall durch Verstellung der Rotorblätter eingenommen werden kann. Der durch einen Freilauf vom Triebwerk entkuppelte Rotor wird im Sinkflug durch den …   Universal-Lexikon

  • Autorotation — In aviation, the word autorotation is applied to operation of fixed wing aircraft and rotary wing aircraft. The word has significantly different meanings in each of these two applications.In the operation of fixed wing aircraft, autorotation is… …   Wikipedia

  • Autorotation — L autorotation est le mouvement de rotation sur lui même qu un mobile subit éventuellement lors de son déplacement dans le fluide : il peut par exemple s agir d une hélice non motorisée, fonctionnant à la manière d une éolienne. Pour les… …   Wikipédia en Français

  • autorotation — i. A condition in which a rotor of a helicopter is driven solely by the action of air ascending through its blades rather than by engine power. In helicopters, descending with the power off, air flows in the reverse direction upward through the… …   Aviation dictionary

  • Autorotation (helicopter) — Autorotation is the state of flight where the main rotor system of a helicopter is being turned by the action of air moving up through the rotor rather than engine power driving the rotor. The term autorotation can be traced back to a period of… …   Wikipedia

  • autorotation to touch-down — An expression used by a helicopter pilot to indicate that he or she will be landing without applying power to the rotor. Also called autorotational landing or touchdown autorotation …   Aviation dictionary

  • autorotation — noun Date: 1918 the turning of the rotor of an autogiro or a helicopter with the resulting lift caused solely by the aerodynamic forces induced by motion of the rotor along its flight path • autorotate intransitive verb …   New Collegiate Dictionary

  • autorotation — autorotational, adj. /aw toh roh tay sheuhn/, n. Aeron. the condition of flight occurring when lift is derived solely from the action of air upon the unpowered rotor of a moving helicopter or autogiro. [1915 20; AUTO 1 + ROTATION] * * * …   Universalium

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