autorotative descent

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Rotary Rocket — Rotary Rocket, Inc, was a rocketry company headquartered in a convert|45000|sqft|m2|sing=on facility at Mojave Airport that developed the Roton concept in the late 1990s as a fully reusable Single Stage to Orbit (SSTO) manned spacecraft. Roton… … Wikipedia
Cierva W.9 — W.9 The W.9 in April 1947 Role experimental helicopter Manufacturer Cierva Autogiro Company, Ltd. First flight … Wikipedia
height/velocity curve — A chart produced by the helicopter manufacturer indicating regions from which safe autorotative descent is possible for a helicopter. It assumes zero wind, sea level, and maximum takeoff weight. Typical height velocity curve … 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 — 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

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