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Spin: angles and inertial moments

Published online by Cambridge University Press:  04 July 2016

Patroclos J. Yangos  and
John P. Yangos
Patroclos J. Yangos
Affiliation:
Hellenic AF College
John P. Yangos
Affiliation:
HAF Technology Research Center (KETA)
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Extract

‘Young lady, a spin is like a love affair;

you don't notice how you get into it

and it is very hard to get out of!’

Theodore von Karman to Amy Johnson*

The serious mathematical complications of the kinetics of the aeroplane spin have given birth to methods of explanation based on assumptions and simplifications, the application of which, not unfrequently, has led to confusion and misunderstanding on the part of the student, let alone error on the part of the initiator of the method.

One of the problems, is the selection of the geometric parameters that have to be introduced as opposed to those which may be left out of the picture. Obviously, in such complex movement as the spin, the most obscure parameters are the angles of the motion. Unfortunately, there is a minimum number of such angles which is necessary and if one, hopefully, begins with a lesser number, one soon finds that the rest have to be put in place, even tardily, if the puzzle is to be completed.

Type
Research Article
Information
The Aeronautical Journal , Volume 85 , Issue 846 , August 1981 , pp. 270 - 276
Copyright
Copyright © Royal Aeronautical Society 1981 

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References

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