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The Wind Channel: Its Design and Use

Published online by Cambridge University Press:  14 September 2016

J. R. Pannell
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Extract

It has long been realised that experiments in the laboratory on small models afford in certain cases a means of obtaining, cheaply and rapidly, information on the behaviour of the actual structure under the conditions in which it is to be used. This plan has been adopted in many branches of science, and in none to a larger extent than in naval and aeronautical architecture. The problems to be investigated are usually those connected with the motion of bodies through a fluid, but if we accept the principle of relative motion we have an alternative method open to us for our model experiments. We may, if we wish, reverse the conditions and set the fluid in motion, the model remaining stationary. Generally speaking, one plan has been adopted in naval architecture and the other in aeronautics. In the former case models are towed through water in a ship tank, while in the latter they are placed in a tube through which air is passed.

Type
Research Article
Information
The Aeronautical Journal , Volume 22 , Issue 91 , July 1918 , pp. 211 - 240
Copyright
Copyright © Royal Aeronautical Society 1918

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References

Note on page 212 * Described in the Smithsonian Misc. Col., Vol. 62

Note on page 222 * Kontchino Bulletin Fase, I., 1906.

Note on page 228 * This beam is called the lift beam from the common practice of supporting a model in such a manner that the lift forces act across the current.

Note on page 230 * Rpt. Adv. Comm. for Aero., 1913-14, p. 291.

Note on page 232 * See Rpt. Adv. Comm. for Aero., 1912-13, p. 59 et seq.

Note on page 233 * Rpt. Adv, Comm, for Aero., 1912-13, p. 63.

Note on page 234 * Rpt. Adv. Comm. for Aero., 1912-13, p. 35.

Note on page 235 * “ Engineering,” Sept. 12, 1913.

†Smithsonian Misc. Col., Vol. 62, No. 4, p. 34.

Note on page 236 * Effective pitch is calculated from the airspeed in the channel just before the airscrew (neglecting increase of velocity due to inflow) divided by revs, per min.

Note on page 237 * Rpt. Adv. Comm. for Aero., 1912-13, p. 77.

†Rpt. Adv. Comm. for Aero., 1909-10, p. 70.

‡Rpt. Adv. Comm. for Aero, 1912-13, p. 135.

Note on page 239 * Rpt. Adv. Coram, for Aero., 1912-13, p. 172.