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Analysis of a Pilot Airplane Lateral Instability Experienced with the X-15 AirplaneAn analysis is made of a lateral-control problem in which the pilot, through normal application of control, induces divergent oscillations in bank angle. The problem, first encountered on the X-15 simulator and later confirmed in flight, is explained through the use of root-locus plots of the pilot-airplane combination in which the pilot is represented by a human transfer function. A parameter is developed which is useful for predicting the lateral-control problem and for showing the effect of the principal aerodynamic and inertial parameters. Also, means of determining regions in the flight envelope where the pilot-airplane would be susceptible to lateral instability are developed.
Document ID
Document Type
Other - NASA Technical Note (TN)
Taylor, Lawrence W., Jr.
(NASA Dryden Flight Research Center Edwards, CA United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1961
Subject Category
Aircraft Stability And Control
Report/Patent Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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