Variable-pitch multi-blade rotor, in particular for the rear anti-torque system of a rotating wing aircraft
US5249925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Nov 6, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C2027/8254
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A variable-pitch multi-blade rotor for use as the anti-torque rear rotor of a rotating wing aircraft has a rotor with a central shaft rotated about a central axis, a hub constrained to rotate with the central shaft about the central axis, blades distributed around the central axis with each blade being connected to the central shaft by a twistable element, a pitch control disk for the blades which is constrained to rotate with the central shaft but free to slide axially relative to the central shaft, and a member for controlling the sliding of the pitch control disk along the central shaft. Each blade root is secured to a transverse thrust and pitch control lever forming a yoke having one end hinged to the hub and another end hinged to the pitch control disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.