Rotorcraft having propeller generated power during autorotations
US11572155B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2019 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Jun 30, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C2027/8236
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rotorcraft having pusher propeller generated power during autorotations. The rotorcraft has an engine powered mode and an autorotation mode. The rotorcraft includes an engine and a drivetrain configured to receive torque and rotational energy from the engine in the engine powered mode. A main rotor system is coupled to the drivetrain and is rotatable to generate lift and forward thrust for the rotorcraft in the engine powered mode. A pusher propeller is coupled to the drivetrain and is rotatable to generate forward thrust for the rotorcraft in the engine powered mode. In the autorotation mode, the pusher propeller is aerodynamically driven responsive to airflow therethrough and the drivetrain is configured to receive torque and rotational energy from the pusher propeller, thereby providing power to the main rotor system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.