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Application of Forebody Strakes for Directional Stability and Control of Transport AircraftA brief overview of a cooperative NASA/Boeing research effort, Strake Technology Research Application to Transport Aircraft (STRATA), intended to explore the potential of applying forebody strake technology to transport aircraft configurations for directional stability and control at low angles of attack, is presented. As an initial step in the STRATA program, an exploratory wind-tunnel investigation of the effect of fixed forebody strakes on the directional stability and control characteristics of a generic transport configuration was conducted in the NASA Langley 12-Foot Low-Speed Wind Tunnel. Results of parametric variations in strake chord and span, as well as the effect of strake incidence, are presented. The use of strakes for yaw control is also discussed. Results emphasize the importance of forebody/fuselage crossflow in influencing strake effectiveness. Strake effectiveness is also seen to be directly related to its span, but less sensitive to chord; a very short-chord strake with sufficient span can have a significant effect.
Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Shah, Gautam H.
(NASA Langley Research Center Hampton, VA, United States)
Granda, J. Nijel
(Boeing Co. Long Beach, CA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1999
Subject Category
Aircraft Stability And Control
Report/Patent Number
AIAA Paper 98-4448
Distribution Limits
Public Use Permitted.
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