Helicopter rotor blade
US4427344A · kind A · utility
12Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1981 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Mar 13, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/463
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A helicopter rotor blade is disclosed having a root end for attachment to a rotor head, a tip end defining the end of the blade fartherest from the root end with a central portion of aerofoil section extending between and attached to the root end and the tip end to define a rotor radius wherein an outboard region of the central portion has a negative basic pitching moment coefficient of absolute value not less than 0.02 and an inboard region having a basic pitching moment coefficient more positive than that of the outboard region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.