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Helicopter Research: a review of outstanding problems together with an account of some recent work at A & A A E

Published online by Cambridge University Press:  26 October 2023

F O'Hara

Summary

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In the first part of the paper a brief review is made of major items for research in the helicopter field, the subjects touched on including rotor aerodynamics, stability and control, evaluation of configurations, vibrations and fatigue, and operational aspects An outline is given, in the section on stability and control, of work being done at A & A E E in connection with the assessment of the longitudinal handling characteristics of helicopters The second part of the paper contains an account of recent work at A & A E E on the low speed and take-off performance of a helicopter An empirical method of low speed performance estimation is described, and the variation with wind speed of the ground effect on a rotor is discussed theoretically and on the basis of experimental results A theoretical analysis of the forward take-off motion of a helicopter is briefly presented, and the final section is concerned with the performance of a multi-engine helicopter in the event of failure of one engine, with particular reference to the possibility of safe operation from the type of site proposed for civil use

Type
Joint Section Lecture with The Royal Aeronautical Society, 18th February, 1954
Information
The Journal of the Helicopter Association of Great Britain , Volume 7 , Issue 4 , April 1954 , pp. 206 - 223
Copyright
Copyright © Royal Aeronautical Society 1954

References

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