System and method for reducing the noise of pusher type aircraft propellers
US8622334B2 · kind B2 · utility
15Cited by
14References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 2011 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Sep 13, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system and method for reducing the noise penalty of a pusher propeller, allowing an aircraft to retain its advantages for UAV configurations, while allowing acoustic performance similar to that of a tractor propeller by reducing, or eliminating, propeller noise emissions. The system and method provide an airfoil-shaped flight surface with (i) a scoop configured to route boundary layer air and associated wake from said flight surface, and (ii) a suction device configured to provide a suction pressure, wherein the scoop routes boundary layer air from the flight surface to the suction device via an opening in the flight surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.