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A Windshear Hazard IndexAn aircraft exposed to hazardous low-level windshear may suffer a critical loss of airspeed and altitude, thus endangering its ability to remain airborne. In order to characterize this hazard, a nondimensional index was developed based oil aerodynamic principals and understanding of windshear phenomena, 'This paper reviews the development and application of the Bowles F-tactor. which is now used by onboard sensors for the detection of hazardous windshear. It was developed and tested during NASA/I:AA's airborne windshear program and is now required for FAA certification of onboard radar windshear detection systems. Reviewed in this paper are: 1) definition of windshear and description of atmospheric phenomena that may cause hazardous windshear. 2) derivation and discussion of the F-factor. 3) development of the F-factor hazard threshold, 4) its testing during field deployments, and 5) its use in accident reconstructions,
Document ID
20000116199
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Proctor, Fred H. (NASA Langley Research Center Hampton, VA United States)
Hinton, David A. (NASA Langley Research Center Hampton, VA United States)
Bowles, Roland L. (Aero Tech Research, Inc. Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Air Transportation And Safety
Meeting Information
Meeting: Aviation, Range and Aerospace Meteorology
Location: Orlando, FL
Country: United States
Start Date: September 11, 2000
End Date: September 15, 2000
Sponsors: American Meteorological Society
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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