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Stall Warning Using Contamination Detecting Aerodynamics
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English
Abstract
Aerodynamically monitoring the performance of an aircraft's lifting surface provides the missing component in stall warning. The missing component is the ability to measure the premature loss of lift due to contamination such as insect deposits, snow, slush, or ice on the lifting surface. Conventional stall warning systems, which use a fuselage mounted angle of attack sensor, do not measure the actual stalling condition at the wing. The key to determining an early stall due to the presence of contamination is to measure the flow directly at the lifting surface. Local velocity changes in a region above the upper surface of the wing provide a consistent indication of an approaching aerodynamic stall even when contamination is present. This method of stall warning also offers new levels of safety during low level windshear recovery and takeoff performance monitoring.
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Citation
Catlin, P., "Stall Warning Using Contamination Detecting Aerodynamics," SAE Technical Paper 922010, 1992, https://doi.org/10.4271/922010.Also In
References
- Brumby, R. E. The Effect of Wing Ice Contamination On Essential Flight Characteristics Douglas Aircraft Company
- Worden, A. M. Air Flow Monitor and Stall Warning Device Maris Worden Aerospace Inc.
- Catlin, P. A. Flight Test Report for Aerodynamic Performance Monitor on Cessna-421 Jet Electronics and Technology, Inc.
- Lium, G. D. Dow, J. P. Sr. Minutes from FAA NASA International Tailplane Icing Workshop