Blade with curved end for a rotary airfoil of an aircraft
US4880355A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 24, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Jun 24, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/463
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention provides a rotary aircraft airfoil comprising an attachment for fixing to a hub, a current part having a leading edge and a trailing edge and whose profile has a chord of constant or evolutive length, and a tip which extends said current part outwardly and whose leading edge extends the leading edge of said current part rearwardly in a sweep, said tip being in addition downwardly slanted. This blade is remarkable in that the downward slant of said blade tip extends over the whole of the span of this tip and is continuous from the connection with the current blade part as far as the end edge of said tip so that said tip follows a curvature such that its extrados is convex and its intrados is concave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.