Collective control system for a helicopter
US4696445A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1986 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Sep 18, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C13/0421
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Pilot workload is reduced in a helicopter having a force-type, multi-axis sidearm control stick by providing a displacement-type control stick for collective blade pitch control. Either stick may be used by the pilot. When the force-type stick is employed, a trim system causes the displacement-stick to track a collective position command signal which is provided to the blade actuators. Changeover of control to the displacement-type control stick is accomplished either with a switch, or by moving the collective-type control stick. The signals associated with each control stick are alternately faded in and out to assure a smooth transition when collective control is switched over from one to the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.