发明名称 |
Helicopter rotor blades. |
摘要 |
<p>A helicopter rotor blade (11) includes at its outer end (35) a tip vane (15) having a mean chord length greater than fifty per cent of a chord length of a blade central portion and a span length (25) greater than fifty per cent of the blade chord which in operation generates two approximately equal strength tip vortices to reduce an acoustic impulse and a resulting noise known as blade slap. <IMAGE></p> |
申请公布号 |
EP0482932(A1) |
申请公布日期 |
1992.04.29 |
申请号 |
EP19910309847 |
申请日期 |
1991.10.24 |
申请人 |
WESTLAND HELICOPTERS LIMITED |
发明人 |
PERRY, FREDERICK JOHN;BROCKLEHURST, ALAN |
分类号 |
B64C5/08;B64C23/06;B64C27/46;B64C27/467 |
主分类号 |
B64C5/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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