De-rotation system for a counter-rotating, coaxial rotor hub shaft fairing
US7621480B2 · kind B2 · utility
27Cited by
25References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 2006 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | May 12, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S1/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rotor hub fairing system includes an upper hub fairing, a lower hub fairing and a shaft fairing therebetween. The rotor hub fairing system is attached to the counter-rotating, coaxial rotor system through a bearing arrangement such that the shaft fairing may be positioned at an azimuthal position about the main rotor axis of rotation relative the airframe by a de-rotation system. The de-rotation system controls the position of the shaft fairing about the axis of rotation such that the shaft fairing is prevented from rotating freely in unison with either shaft as may otherwise result during some flight regimes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.