Blade end for rotary wing of an aircraft and rotary wing provided with such blade ends
US4451206A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 26, 1982 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | May 26, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/463
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a blade end for rotary wing of an aircraft, whose span is between 5 and 15% of the span of said blade. According to the invention, this blade end is charaterized in that, between points A and B', there is a stagger which, measured parallel to the span of the blade, is between 5 and 25% of the chord of the profile of the blade adjacent said blade end and in that the leading edge line of said blade end is curvilinear and such that its angle of sweep .phi. varies progressively and continuously from a low value .phi..sub.o near the blade, of between 0.degree. and 30.degree., up to a high value .phi..sub.E towards the outside of the blade, of between 60.degree. and 90.degree.. The invention leads to increased performances and to a reduction in the noise level of rotary wings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.