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The Pressure Jet Helicopter*

Published online by Cambridge University Press:  04 July 2016

A. Stepan
A. Stepan*
Affiliation:
Fairey Aviation Co. Ltd.
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Extract

Before enlarging on the main subject of this paper, it will be helpful to clarify some fundamental conceptions of various rotor drive configurations.

In the past the original shaft-driven helicopter presented two major problems to the designer. These were first: the necessity to choose between either some torque balancing device or a multi-rotor layout and, second: the necessity of a large reduction gear box, the weight of which seemed to become prohibitive with increasing all-up weight of the design. Big helicopters with either single rotor/tail rotor configuration or multi-rotor configuration, are flying successfully and prove that these afore-mentioned problems, although still in existence, were mastered in an admirable way. Nevertheless, in the old days the words “ tip. drive ” had a magic sound to the harassed designer.

Type
Research Article
Information
The Aeronautical Journal , Volume 62 , Issue 566 , February 1958 , pp. 123 - 131
Copyright
Copyright © Royal Aeronautical Society 1958

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Footnotes

*

A Section Lecture given on 9th October 1956.

References

1.Douglas, L. L. (1949). An Analysis of the Pressure Jet Helicopter. A Paper Presented at the Fifth Annual Forum, American Helicopter Society, May 1949.Google Scholar
2.Stepan, A. (1949). Jet Propulsion of Rotor Blades. Journal of the Helicopter Association of Great Britain, Vol. 3, No. 3, 1949.Google Scholar
3.Brown, John (1954). Some Applications of Gas Turbine to Helicopter Propulsion. Journal of the Helicopter Association of Great Britain, Vol. 8, No. 3.Google Scholar
4.Bragg, S. L. and Holliday, J. B. (1955). The Influence of Altitude Operating Conditions on Combustion Chamber Design. Second AG ARD Combustion Colloquium, 5th–9th December 1955, Published by Universities Press, Belfast, by Sir Isaac Pitman and Son.Google Scholar
5.Richards, E. J. (1955). Problems of Noise in Helicopter Design. Journal of the Helicopter Association of Great Britain, Vol. 9, No. 1.Google Scholar