Bearingless tail rotor for helicopters
US4306837A · kind A · utility
13Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1979 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Apr 24, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/33
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A helicopter tail rotor structure includes a thin, flat, tension-bearing strap of fibers extending spanwise, and is to be centrally secured by a hub to a helicopter tail mast. Flex sections are formed inboard of substantially equally divided portions of said fibers which extend as top and bottom blade spars from the outboard margins of the flex sections. Preferably, the planes of the flex sections and the planes of the spars are oriented at predetermined nose-up twist angles, one relative to the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.