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The Fan Dynamometer

Some Notes on Tests

Published online by Cambridge University Press:  14 September 2016

J. Lawrence Hodgson
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Extract

The investigation described below was undertaken in order to obtain a more accurate knowledge than can be obtained from any published results as to how the resisting torque due to the blades of a fan dynamometer varies with their shape and size, with the diameter of the fan, and with the density of the fluid in which the blades rotate.

Type
Research Article
Information
The Aeronautical Journal , Volume 20 , Issue 77 , March 1916 , pp. 20 - 26
Copyright
Copyright © Royal Aeronautical Society 1916

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References

page 20 note * A list of the symbols used is given at the end of the Paper.

page 22 note * In the author's experiments N varied for any one fan over a range of 1 : 3 ; in Messrs. Morgan and Wood's experiments over a range of 1 : 2. These ranges are too small to prove that: the N2 law is followed exactly.