Emergency collective actuator and method for a helicopter
US9789958B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2016 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Nov 7, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C27/59
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A helicopter includes a rotor system having a rotor with an adjustable pitch that is controlled at least in part by a pilot using a collective control and which helicopter generates a Low RPM signal that is indicative of a threshold low rotational speed of the rotor. An actuator arrangement can move the collective control by exerting a force on the collective control such that the pilot is able to overcome the actuator force but which otherwise can move the collective control from a current operational position toward a minimum pitch position. A clutch can co-rotate with a motor to serve in transferring the actuation force to reduce the adjustable pitch and can slip relative to the actuator shaft assembly responsive to an application of a counterforce applied by the pilot to the collective control such that the counterforce overcomes the actuation force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.