Communications: electrical – Aircraft alarm or indicating systems – Flight alarm
Patent
1990-03-12
1991-10-01
Crosland, Donnie L.
Communications: electrical
Aircraft alarm or indicating systems
Flight alarm
244191, 340963, G08B 2300
Patent
active
050537679
ABSTRACT:
The invention provides for the detection of both longitudinal and vertical windshears during the takeoff and landing phases of aircraft flight. Standard instrumentation available on many aircraft is used to calculate the aircraft's energy loss or gain by integrating the value of the longitudinal shear. When the energy loss or gain exceeds predetermined levels, appropriate annuciation is provided to the human pilot. The same standard instrumentation aforementioned is also used to calculate changes in the aircraft's specific energy rate, that is the aircraft's actual energy rate divided by the aircraft's weight, to determine the effect of vertical winds. Specific energy rate is calculated by integrating the difference between the aircraft's acceleration relative to the ground and its acceleration relative to the airmass in which it is flying. To preclude false annunciations caused by the integration of small biases resulting from sensor or computational errors, all integrations are set to zero, that is the integrators are reset whenever the relevant parameters are below predetermined thresholds.
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Youssefi Khosrow H.
Zweifel Terry L.
Albin Arnold L.
Crosland Donnie L.
Honeywell Inc.
Swarthout Brent A.
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