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High-angle-of-attack stability and control improvements for the EA-6B ProwlerThe factors involved in high-angle-of-attack directional divergence phenomena for the EA-6B ECM aircraft have been investigated in NASA-Langley wind tunnel facilities in order to evaluate airframe modifications which would eliminate or delay such divergence to angles-of-attack farther removed from the operational flight envelope of the aircraft. The results obtained indicate that an adverse sidewash at the aft fuselage and vertical tail location is responsible for the directional stability loss, and that the sidewash is due to a vortex system generated by the fuselage-wing juncture. Modifications encompassing a wing inboard leading edge droop, a wing glove strake, and a vertical fin extension, have significantly alleviated the stability problem.
Document ID
19870061804
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Jordan, Frank L.
(NASA Langley Research Center Hampton, VA, United States)
Hahne, David E.
(NASA Langley Research Center Hampton, VA, United States)
Masiello, Matthew F.
(NASA Langley Research Center Hampton, VA, United States)
Gato, William
(Grumman Corp. Aircraft Systems Div., Bethpage, NY, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Aircraft Stability And Control
Report/Patent Number
AIAA PAPER 87-2361
Accession Number
87A49078
Distribution Limits
Public
Copyright
Other

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