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A Random Distribution of Gusts Corresponding to a Measured Frequency of Vertical Gusts

Published online by Cambridge University Press:  07 June 2016

M. Fine
M. Fine*
Affiliation:
Rotol Ltd.
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Summary

The paper describes a method of estimating the frequency of gust components in the plane of a propeller from measurements of vertical gust components, which are those generally recorded. By this means additional flight recording is avoided and the danger of under-estimating the frequency of gusts affecting the propeller is reduced. Random distribution of gusts in space is assumed. It is found that gust components in the plane of the propeller of 10 ft./sec. or more occur 2·51 times as frequently as vertical components of 10 ft./sec. or more. For speeds greater than 10 ft./sec., the ratio is higher.

Type
Research Article
Information
Aeronautical Quarterly , Volume 9 , Issue 3 , August 1958 , pp. 251 - 257
Copyright
Copyright © Royal Aeronautical Society. 1958

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References

1. Bullen, N. I. B. The Variation of Gust Frequency with Gust Velocity and Altitude. A.R.C. Current Paper 324, 1957.Google Scholar
2. Watson, G. N. A Treatise on the Theory of Bessel Functions. Cambridge University Press, 1944.Google Scholar
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5. Glaisher, J. W. L. On Riccati's Equation and its Transformations, and on Some Definite Integrals which Satisfy Them. Phil. Trans. Roy. Soc, 1881, Part III.Google Scholar
6. Fine, M. A Random Distribution of Gusts Corresponding to a Measured Frequency of Vertical Gusts. Rotol Performance Office Report No. 1026, April 1957.Google Scholar