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Static and dynamic stability

Published online by Cambridge University Press:  04 July 2016

A. W. Babister
A. W. Babister*
Affiliation:
University of Glasgow
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Extract

For most aircraft, longitudinal dynamic stability is assured if the static margin is positive. However, a statically stable aircraft is not necessarily dynamically stable. The problem of establishing under what conditions static stability is sufficient has recently been considered in Ref. I, by means of two-parameter stability diagrams. It seems to the present writer that a simpler approximate solution can be found by considering the factors of the characteristic equation.

Type
Research Article
Information
The Aeronautical Journal , Volume 82 , Issue 806 , February 1978 , pp. 85 - 87
Copyright
Copyright © Royal Aeronautical Society 1978 

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References

1. Sachs, G. Static stability and aperiodic divergence. Journal of Aircraft, Vol 12, p 497. 1975.Google Scholar
2. Lyon, H. M., Truscott, P. M., Auterson, E. I. and Whatham, J. Theoretical analysis of longitudinal dynamic stability in gliding flight. R & M 2075, 1942.Google Scholar
3. Babister, A. W. Aircraft stability and control. Pergamon Oxford, 1961.Google Scholar
4. Neumark, S. Problems of longitudinal stability below minimum drag speed, and theory of stability under constraint. R & M 2983, 1957.Google Scholar
5. Gates, S. B. and Lyon, H. M. A continuation of longitudinal stability and control analysis. Part 1. General theory. R & M 2027, 1944.Google Scholar