Excessive descent rate warning system for aircraft
US3947808A · kind A · utility
51Cited by
11References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1975 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Jan 22, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/0607
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a system that compares the rate of descent of an aircraft with its altitude above ground and generates a warning signal when the sink rate exceeds a predetermined limit for a particular altitude, the maximum warning time is limited to a specified value in order to minimize nuisance warnings at higher altitudes. At a descent rate above a certain value, the excessive sink rate warning signal is inhibited for combinations of descent rates and aircraft altitudes which would provide a warning greater than a selected time to impact, such as 30 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.