Helicopter antitorque tail rotor
US8056851B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2009 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | May 19, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/82
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A blade for an antitorque tail rotor of a helicopter, having a leading edge and a trailing edge opposite each other and elongated along a longitudinal axis of the blade; the trailing edge, in use, interacts with the air current after the leading edge; the blade also has two opposite surfaces extending between the leading edge and the trailing edge, and a root portion extending from a radially inner first end, with respect to a rotation axis of the blade, towards a second end opposite the first end; and the root portion, when sectioned in a plane perpendicular to the leading edge and trailing edge, has a profile asymmetrical with respect to a chord joining the leading edge and trailing edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.