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Measurements of the oscillatory lateral derivatives of a high incidence research model (HIRM 1) at speeds up to M = 0.8

Published online by Cambridge University Press:  04 July 2016

C. O. O'Leary  and
E. N. Rowthorn
C. O. O'Leary
Affiliation:
Royal Aerospace Establishment, Bedford
E. N. Rowthorn
Affiliation:
Royal Aerospace Establishment, Bedford
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Summary

Tests were made to investigate the effects of Mach number on the oscillatory lateral derivatives of a three-surface, high-incidence research model (HIRM 1). Effects of Reynolds number and frequency parameter were also investigated at low speed. A new flexible sting and hydraulic actuator system were designed for the tests in the 2.4 m x 2.4 m Pressurised Wind Tunnel.

Results showed that the effects of Reynolds number and frequency parameter were not very significant at low speeds but there were quite large effects of Mach number on some derivatives, notably yawing and rolling moments due to sideslip and rate of yaw.

Type
Research Article
Information
The Aeronautical Journal , Volume 93 , Issue 921 , January 1989 , pp. 11 - 21
Copyright
Copyright © Royal Aeronautical Society 1989 

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References

1. Ross, A. J. and Reid, G. E. A. Development of Mathematical Models for a High Incidence Research Model - Parts 1 and 2. RAE Technical Reports 83077 and 84072, 1983.Google Scholar
2. O'Leary, C. O. Dynamic Tests on a High Incidence Research Model (HIRM) in a Low-Speed Wind Tunnel. RAE Technical Report 84111, 1984.Google Scholar
3. Ross, A. J. and Edwards, G. F. Correlation of Predicted and Free-Flight Responses near Departure Conditions of a High Incidence Research Model. RAE Technical Memorandum Aero 2031, 1985.Google Scholar
4. O'Leary, C. O. Wind-Tunnel Measurement of Lateral Aerodynamic Derivatives using a New Oscillatory Rig, with Results and Comparisons for the Gnat Aircraft. RAE Technical Report 77159, 1977.Google Scholar
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