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Theory of wing rockWing rock is one type of lateral-directional instabilities at high angles of attack. To predict wing rock characteristics and to design airplanes to avoid wing rock, parameters affecting wing rock characteristics must be known. A new nonlinear aerodynamic model is developed to investigate the main aerodynamic nonlinearities causing wing rock. In the present theory, the Beecham-Titchener asymptotic method is used to derive expressions for the limit-cycle amplitude and frequency of wing rock from nonlinear flight dynamics equations. The resulting expressions are capable of explaining the existence of wing rock for all types of aircraft. Wing rock is developed by negative or weakly positive roll damping, and sustained by nonlinear aerodynamic roll damping. Good agreement between theoretical and experimental results is obtained.
Document ID
19850037432
Document Type
Conference Paper
Authors
Hsu, C.-H. (Kansas Univ. Lawrence, KS, United States)
Lan, C. E. (Kansas, University Lawrence, KS, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
AIRCRAFT STABILITY AND CONTROL
Report/Patent Number
AIAA PAPER 85-0199
Funding Number(s)
CONTRACT_GRANT: NAG1-134
Distribution Limits
Public
Copyright
Other