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The Theory of the Dunne Aeroplane

Published online by Cambridge University Press:  24 August 2017

J. W. Dunne
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Extract

This small addition to the evening's programme has been made possible by the courtesy of Mr. Mervyn O'Gorman, who has cut out a portion of his lecture in order to make room for me. You, as scientific people, will realise that this is just about as generous a thing as a man can do, and I can assure Mr. O'Gorman that I am proportionately grateful.

The title of Mr. O'Gorman's lecture has suggested to me that perhaps after all the simplest and most readily comprehensible way of describing this machine is to present it in its aspect of a combination of a number of stability devices. This lecture will therefore be more qualitative than quantitative.

Type
Research Article
Information
The Aeronautical Journal , Volume 17 , Issue 66 , April 1913 , pp. 83 - 102
Copyright
Copyright © Royal Aeronautical Society 1913

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References

note on page 86 * My attention having been accidentally directed to fluid flow in diverging, converging, and vena-eontraeta pipes, it occurred to me that wings built in such forms would give pressure distributions quite different from the ordinary, and also quite different travels of the centre of pressure, and were therefore worthy of investigation. But the stability actually obtained with the first model came as an astounding surprise.

note on page 88 * My late friend. Captain Ferbor, told me that Penaud was the first to explain the stabilising effect of the longitudinal “Veo.” But I understand that Penaud acknowledged considerable indebtedness to Sir George Cayley.

note on page 94 * As if, for example, it were deliberately banked over by the use of the ailerons, which were immediately afterwards returned to their normal position.

note on page 95 * i.e., it must elevate as the angle of incidence is reduced by this upward deviation.

note on page 99 * The tips of the "Zanonia" leaf form a negative kathedral, which rolls the leaf the same way as does a positive dihedral, but lacks the stability of the latter.