发明授权
US08998127B2 Pre-landing, rotor-spin-up apparatus and method 有权
预着陆,转子旋转装置和方法

Pre-landing, rotor-spin-up apparatus and method
摘要:
A method and apparatus for reducing roll of rotorcraft landing in autorotation may include executing a flight with a rotorcraft. The flight may include first, second, and third portions ordered sequentially. During the first portion, the rotorcraft may be flown with the rotor exclusively in autorotation. During the second portion, the rotorcraft may be flown with the rotor powered at least partially by an engine of the rotorcraft, which may increase the rotational speed of the rotor. During the third portion, the rotorcraft may be flown with the rotor exclusively in autorotation. The flight and the third portion may terminate simultaneously with a touch down of the rotorcraft. Kinetic energy stored in the rotor during the second portion, during the third portion, bring the ground speed of the rotorcraft to substantially zero before touching down.
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