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高速旋翼机专利技术

2018-3-31 19:48| 发布者: dymodel| 查看: 33| 评论: 0|原作者: ship

摘要: 高速旋翼机专利技术 Abstract An improved method of operating rotorcraft capable of achieving high speeds such that stability is maintained as the craft speed exceeds 0.75 times the rotor tip sp ...
高速旋翼机专利技术



Abstract
An improved method of operating rotorcraft capable of achieving high speeds such that stability is maintained as the craft speed exceeds 0.75 times the rotor tip speed. These high speeds are achieved by varying collective pitch, including to negative values, to maintain acceptable levels of flapping at high aircraft forward speeds and low rotor rotation rates, or adjusting or maintaining the rotor rotation rate by automatically controlling the tilt of the rotor disk relative to the airstream or aircraft, or a combination of these techniques. More specifically, by utilizing these techniques the forward aircraft speeds can be high enough, and the rotor rotation rates low enough, that an advance ratio, Mu, greater than 0.75 can be achieved while maintaining rotor stability.

Patent number: 6435453
Filing date: Aug 18, 2000
Issue date: Aug 20, 2002
Inventors: Jay W. Carter, Jr.
Assignees: Cartercopters, L.L.C.
Primary Examiner: Charles T. Jordan
Secondary Examiner: T. Dinh
Attorneys: Bracewell & Patterson, L.L.P.
Application number: 9/641,364

U.S. Classification
244/8; 244 25 R; 244/171.1

International Classification
B64C 2702


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