Communications: electrical – Aircraft alarm or indicating systems – Flight alarm
Patent
1986-07-15
1989-07-18
Orsino, Joseph A.
Communications: electrical
Aircraft alarm or indicating systems
Flight alarm
73178T, 340963, 342 65, 364433, G08B 2300
Patent
active
048497568
ABSTRACT:
An aircraft ground proximity warning system is disclosed having an inadequate terrain clearance warning mode, wherein the criteria required to generate the warning is modified when the aircraft is flying over undulating or mountainous terrain. The system is responsive to signals representative of the radio altitude, the barometric altitude, the speed of the aircraft, the flap position and the landing gear position to provide warnings when the aircraft is operating below a predetermined altitude with either or both of the landing gear of the flaps not in a landing configuration. The warning system also provides a warning when the aircraft is traveling above a predetermined speed and below a predetermined altitude irrespective of the configuration of the landing gear or the flaps. Also disclosed is logic circuitry for detecting that the aircraft is flying over undulating or mountainous terrain and modifying the warning envelope during such condition to provide longer warning times.
REFERENCES:
patent: 3925751 (1975-12-01), Bateman et al.
patent: 3936796 (1976-02-01), Bateman
patent: 3944968 (1976-03-01), Bateman et al.
patent: 4030065 (1977-06-01), Bateman
patent: 4567483 (1986-01-01), Bateman et al.
patent: 4675823 (1987-06-01), Noland
Orsino Joseph A.
Sundstrand Data Control Inc.
Swarthout Brent A.
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