G - Physics – 08 – B
Patent
G - Physics
08
B
343/15, 354/18
G08B 23/00 (2006.01) G01C 5/00 (2006.01) G01C 21/00 (2006.01) G05D 1/08 (2006.01)
Patent
CA 1243117
ALTITUDE LOSS AFTER TAKE-OFF WARNING SYSTEM UTILIZING TIME AND ALTITUDE Abstract of the Disclosure 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 save 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 sen- sitive 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.
498123
Riches Mckenzie & Herbert Llp
Sundstrand Data Control Inc.
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