Warning system for tactical rotary wing aircraft
US4980684A · kind A · utility
21Cited by
11References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1984 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Jul 11, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C5/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A warning system for rotary wing aircraft that monitors the altitude above ground of the aircraft and issues a warning when there is insufficient terrain clearance. The warning criteria are optimized for rotary wing aircraft and are altered as a function of landing gear position and airspeed. Two distinct warnings are given. One indicates insufficient terrain clearance and the other warns the pilot if he attempts to land with the landing gear up. Logic circuitry is provided to modify the criteria necessary to generate a warning, and to inhibit certain warnings, as required by the mode of operation of the aircraft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.