Rotary wing aircraft having a non-ducted tail rotor with at least five blades
US10131425B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2015 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Nov 3, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C2027/8272
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A non-ducted tail rotor comprising a hub and at least five blades, each of the blades extending to a free end that, in rotation, describes a circle presenting a given “maximum” radius. The hub is rigidly secured to a drive shaft, the hub comprising a hollow circular body centered on an axis of rotation, the body presenting an “internal” radius between the axis of rotation and an outer periphery of the body, the internal radius lying in the range 0.2 times to 0.4 times the maximum radius, each blade presenting a root extended by an airfoil element projecting from the body, extending from the root to the free end, the root being swivel-hinged to the outer periphery about a pitch axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.