Rotorcraft with opposing roll mast moments, and related methods
US8128034B2 · kind B2 · utility
4Cited by
10References
12Claims
0Family size
Inventor
Key dates
| Filing date | Aug 15, 2006 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Apr 7, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In rotorcraft having rotors on multiple masts, a controller causes opposing roll mast moments to be applied to the different rotors. In preferred embodiments, the opposing roll moment is the result of increasing the lift on the advancing blade and reducing the lift on the retreating blade on the second rotor. This can be accomplished in any suitable manner, such as by applying differential cyclic roll control to the two rotors by tilting the two Swashplates of the two rotors or by using Individual Blade Control (IBC).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.