Aircraft rotor blade of shape adapted for acoustic improvement during an approach flight and for improving performance in forward flight
US10414490B2 · kind B2 · utility
3Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2016 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Jul 28, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/467
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A blade of a rotor for a rotary wing aircraft. The blade presents relationships for variation in the sweep and in the chord of the profiles of sections of the blade, in particular in order to improve the twisting stiffness and the bending stiffness of the blade. The blade is then double-tapered and it presents three sweeps, making it possible firstly to improve the aerodynamic performance of the blade in forward flight, and secondly to reduce the noise given off by the blade, in particular during an approach flight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.