Airplane automatic control force trimming device for asymmetric engine failures
US4648569A · kind A · utility
14Cited by
9References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Oct 23, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C13/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The difference in dynamic pressure in the propeller slipstreams as measured by sensors 20 and 20a is divided by the freestream dynamic pressure generating a quantity proportional to the differential thrust coefficient. This quantity is used to command an electric trim motor 26 to change the position of trim tab 14 thereby retrimming the airplane to the new asymmetric power condition. The change in position of the trim tab produced by the electric trim motor is summed with the pilot's input to produce the actual trim tab position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.