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Definition of the noun Autorotation

What does Autorotation mean as a name of something?

noun - plural: autorotations

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


  1. Autorotation is a state of flight where the main rotor system of a helicopter or similar aircraft turns by the action of air moving up through the rotor, as with an autogyro, rather than engine power driving the rotor. The term autorotation dates to a period of early helicopter development between 1915 and 1920, and refers to the rotors turning without the engine.
  2. Autorotation: For fixed-wing aircraft, autorotation is the tendency of an aircraft in or near a stall to roll spontaneously to the right or left, leading to a spin.

Printed dictionaries and other books with definitions for Autorotation

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Google previewSams Teach Yourself Android Game Programming in 24 Hours (2012)

by Jonathan S. Harbour

Screen autorotation is a serious problem for a game. Figure 10.2. Accelerometer axis directions.

Google previewAircraft Flight Instruments and Guidance Systems (2014)

Principles, Operations and Maintenance by David Wyatt

KEY POINT Autorotation means a rotorcraft flight condition in which the lifting rotor is driven entirely by action of the air when the rotorcraft is in motion. KEY POINT During autorotation, the upward flow of relative airflow allows the main rotor ...

Google previewVan Nostrand’s Scientific Encyclopedia (2013)

by Douglas M. Considine, Glenn D. Considine

Autorotation is an emergency procedure that permits the helicopter to make a safe landing in case of engine failure. It is necessary to maintain the speed of the rotor at sufficient rpm to provide not only adequate airflow over the rotor blades, but ...

Google previewFlight Dynamics, Simulation, and Control (2014)

For Rigid and Flexible Aircraft by Ranjan Vepa

Tumbling or autorotation is a natural outcome of the 307 Aircraft Dynamic Response.

Google previewSurprised at Being Alive (2014)

An Accidental Helicopter Pilot in Vietnam and Beyond by Robert F. Curtis

Properly done, an autorotation is a steep, fast, but relatively normal landing. Done wrong, the result is a sure crash; hence, all helicopter pilots were taught engine failure procedures from nearly the first day of flight school. every time the ...

Google previewMEMOIR: DYNAMITE, CHECK SIX (2013)

by Ray Jones

An autorotation is an emergency landing maneuver performed if the engine on a single-engine helicopter fails. The idea is to descend fast enough to keep the rotor RPM high by windmilling. This stores a lot of kinetic energy so when you get ...

Google previewAdvances in Mathematical Fluid Mechanics (2010)

Dedicated to Giovanni Paolo Galdi on the Occasion of his 60th Birthday by Rolf Rannacher, Adélia Sequeira

One of our central contribution in this paper lies in the discussion of the effect of autorotation. Autorotation is a phenomena, primarily observed in aerodynamics and defined by Lugt [10] as: ...any continuous rotation of a body in a parallel flow ...

Google previewThe Code of Federal Regulations of the United States of America (1982)

Autorotation means a rotorcraft flight condition in which the ...

Google previewHelicopter Aerodynamics Volume I (2009)

by Ray Prouty

Vertical autorotation is a stable condition and for one value of collective pitch the helicopter will settle on one rotor speed and one rate of descent. Using collective pitch, the pilot can control the rotor rpm. The lower the pitch, the faster the rotor ...

Google previewToscotti's War (2015)

by Tony Marconi

click Autorotation is a controlled crash. You cut the fuel, push down on the collective for maximum lift, and lower the nose to keep up your airspeed. As the force of gravity steadily increases your fall toward the ground, a positive, last- second ...

Google previewThe Little Book of Autorotations (2012)

by Shawn Coyle

The zero / low speed Autorotation is a useful tool to help control the overall glide path to arrive at a selected landing site. While it is quite safe to use zero / low speed to help get to a desired spot, it's normally not practical to try to land from such ...

Google previewR/C Model Helicopters A Guide for Beginners (2007)

by Malcolm Messiter

An autorotation is a descent without power. A little negative pitch is used to keep the main blades rotating. In many models the main blades (rather than the engine ) drive the tail blades. This keeps them rotating and thus functional during an ...

Google previewPrinciples of Helicopter Aerodynamics (2002)

by J. Gordon Leishman

Performed skillfully, however, the autorotation is a safe and relatively benign maneuver. 5.4.2 Height-Velocity (HV) Curve The flight conditions that will allow safe entry to an autorotation and recovery of the helicopter are summarized in the ...

Google previewAeronautical Dictionary (2004)

With Emphasis on ATC Communications Terms by J. Deborah Balter

Autorotation - A condition for rotorcraft flight in which the lifting rotor is driven entirely by action of the air when the rotorcraft is in motion. 1. Autorotative Landing/ Touchdown Autorotation - Indicates that a pilot will be landing without applying ...

Google previewA Dictionary of Mechanical Engineering (2013)

by Anthony G. Atkins, Tony Atkins, Marcel Escudier

autorotation Rotation of a body caused by aerodynamic forces. In the operation of a ...

Google previewLewis' Dictionary of Occupational and Environmental Safety and Health (1999)

by Jeffrey Wayne Vincoli

autorotation Aviation. A rotorcraft flight condition in which the lifting rotor is driven entirely ...



Procédures d'urgence, autorotation de base, panne simulée de moteur , résonance sol (causes /remèdes) si applicable au type d'hélicoptère; 3) Vol latéral et arrière, rotation sur place; 4) Identification et procédures de sortie de ...

Google previewEncyclopedia of Machine Learning (2011)

by Claude Sammut, Geoffrey I. Webb

and autonomous autoro- tation (Autorotation is an emergency maneuver that allows a skilled pilot to glide a helicopter to a safe landing in the event of an engine failure or tail-rotor failure.) in Abbeel, Coates, Hunter, and Ng (), Fig. . While DDP ...

Google previewNew American Roget's College Thesaurus in Dictionary Form (Revised &Updated) (2002)

by Philip D. Morehead

clearance, takeoff, liftoff; autorotation; zoom, loop, loop the loop, soar, climbout, climb, chandelle, glide; Immelmann turn, barrel roll; sideslip, crabbing, stall, porpoising, buffeting, fishtailing, flutter; cruising altitude; dive, nosedive, ...

Google previewConcise Oxford English Dictionary (2011)

Book & CD-ROM Set by Angus Stevenson, Maurice Waite

autorotation > n. rotation of an object caused by the flow of moving air or water around it. a — DERIVATIVES autorotate v. autoroute > n. a French motorway. — ORIGIN from Fr . autosave ...

Google previewOxford Dictionary of English (2010)

by Angus Stevenson

autorotation 7noun [mass noun] rotation of an object caused by the flow of moving air or ...

Google previewAcademic Press Dictionary of Science and Technology (1992)

by Christopher G. Morris, Academic Press

auto-restart Computer Technology, the capability of some computers to reinitialize the operating system automatically following the recovery from a power or equipment failure, autorotation Mechanics, the turning of a rotor due solely to the ...

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Scrabble value of A1U1T1O1R1O1T1A1T1I1O1N1

The value of this 12-letter word is 12 points, but it's not an accepted word in the Official Scrabble Players Dictionary.

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