Altitude loss after take-off warning system utilizing time and a

Details Altitude loss after take-off warning system utilizing time and a Altitude loss after take-off warning system utilizing time and a

1987-07-31

1994-02-01

Orsino, Joseph A.

Communications: electrical

Aircraft alarm or indicating systems

Flight alarm

340963, 342 65, 364433, G08B 2300

Patent

active

052835740

ABSTRACT:
Warning systems for aircraft that provide a warning to the pilot of an excessive altitude loss or an excessive descent rate after take-off as long as he is flying below a predetermined altitude have the problem that they require a valid radio altitude signal for proper operation, and tend to generate nuisance warnings when used in low flying aircraft. This problem is solved by comparing the accumulated altitude loss after take-off (12, 14, 62, 34) with the product of a barometrically derived altitude and the length of time the aircraft has been flying (12, 14, 30, 32, 34). A warning is generated if the altitude loss is excessive for the accumulated time-altitude product after take-off (38, 40). Thus, the system is more sensitive immediately after take-off and becomes less sensitive as flight time is accumulated to permit low level maneuvering without generating false or nuisance warnings, and does not require a valid radio altitude signal to generate a warning.

REFERENCES:
patent: 3934222 (1976-01-01), Bateman et al.
patent: 3946358 (1976-03-01), Bateman
patent: 3947808 (1976-03-01), Bateman
patent: 3947810 (1976-03-01), Bateman et al.
patent: 4319218 (1982-03-01), Bateman
patent: 4431994 (1984-02-01), Gemin
patent: 4433323 (1984-02-01), Grove
patent: 4495483 (1985-01-01), Bateman

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