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Calibration of a Cruciform Wind Vane Configuration at Subsonic and Supersonic Speeds

Published online by Cambridge University Press:  04 July 2016

F. W. Dee  and
D. G. Mabey
F. W. Dee
Affiliation:
Royal Aircraft Establishment, Bedford
D. G. Mabey
Affiliation:
Royal Aircraft Establishment, Bedford
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Extract

Incidence and sideslip must be measured accurately in aircraft performance and stability tests. A convenient method is to install wind vanes on a nose boom. When only one sideslip and one incidence vane are fitted, mutual interference occurs, and the vanes do not indicate the true flow direction. This interference can be 0·5° at 0° incidence at subsonic and supersonic speeds. Thus a symmetric configuration of vanes is essential for accurate measurements of incidence and sideslip.

A cruciform arrangement of four wind vanes was fitted around the nose boom Pitot head of the Fairey Delta 2 supersonic research aircraft. The effect of the Pitot boom on the vane sensitivity was determined by a calibration of the aircraft vanes on a duplicate Pitot-static head in the R.A.E. Bedford 3 ft wind tunnel.

The effects of the fuselage and the wing upwash are only present at subsonic speeds and can be estimated.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 67 , Issue 628 , April 1963 , pp. 267 - 268
Copyright
Copyright © Royal Aeronautical Society 1963

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References

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