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A Simple Rolling Method for Ip

Published online by Cambridge University Press:  28 July 2016

P. T. Fink
P. T. Fink*
Affiliation:
Imperial College
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Extract

Aerodynamic theory may be used with reasonable confidence to estimate the low-speed value of the stability derivative Ip for wings of most plan forms under quasi-steady conditions so long as viscous effects are unimportant. Wind tunnels tests are made to cover other cases such as the partially stalled swept wing, but the writer has heard of a difficulty encountered by a firm when using the free-rolling method. A variant of that technique in which this difficulty is avoided and which has been used at Imperial College for some years may be of interest.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 57 , Issue 510 , June 1953 , pp. 419 - 420
Copyright
Copyright © Royal Aeronautical Society 1953

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References

1. Evans, J. M. and Fink, P. T. (1947). Stability Derivatives: Determination of lp by Free Rolling. Australian Council for Aeronautics Report No. 35, 1947.Google Scholar
2. Bradfield, F. B. (1921). Lateral Control of Bristol Fighter at Low Speeds. Measurement of Rolling and Yawing Moments of Model Wings due to Rolling. R. & M. 787, 1921.Google Scholar