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Early Thoughts on the Jet Flap

Published online by Cambridge University Press:  07 June 2016

B. S. Stratford
B. S. Stratford*
Affiliation:
National Gas Turbine Establishment
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Summary

An historical sketch shows how the basic ideas of the jet flap were evolved. The exploratory work included the prediction that lift would be induced on an aerofoil by a two-dimensional jet deflected from the trailing edge, and that the magnitude of the total lift would be of the order of four times the direct jet lift. The prediction was confirmed experimentally and a first quantitative theory evolved. Meanwhile the hypothesis was put forward that, ideally, the forward thrust on the aerofoil would be independent of the deflection angle of the jet.

This paper is the first of a series of papers that will describe the development and present state of knowledge of the jet flap.

Type
Research Article
Information
Aeronautical Quarterly , Volume 7 , Issue 1 , February 1956 , pp. 45 - 59
Copyright
Copyright © Royal Aeronautical Society. 1956

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References

1. Davidson, I. M. The Jet Flap. Journal of the Royal Aeronautical Society, January 1956.CrossRefGoogle Scholar
2. Hagedorn, H. and Ruden, P. Windkanaluntersuchungen an einem Junkers-Doppelflügel mit Ausblaseschlitz am Heck des Hauptflügels. Report by the Institut für Aeromechanik und Flugtechnik der Technischen Hochschule Hannover, Lilienthal Gesellschaft Bericht A.64, 1938.Google Scholar
3. Constant, H. In discussion at the N.G.T.E., November 1952.Google Scholar
4. Stratford, B. S. Unpublished work at the N.G.T.E., March 1953.Google Scholar
5. Glauert, H. Theoretical Relationships for an Aerofoil with Hinged Flap. R. & M. 1095, April 1927.Google Scholar