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Volume 53 - November 1949

Contents

Page 3 of 6

Other

Meeting Report

Afternoon Session: The Constructors' Approach to the Problem

Helicopter Discussion

Research Article

  • The General theory of Cylindrical and Conical Tubes Under Torsion and Bending Loads: Single and Many Cell Tubes of Arbitrary Cross-Section with Rigid Diaphrams

  • J. Hadji-Argyris, P. C. Dunne
  • Published online by Cambridge University Press:
    28 July 2016, pp. 461-483

  • Parts 1 to 5 of this paper (February, September and November 1947 issues of the JOURNAL) investigated the stresses and deformations of closed tubes in which the thicknesses were governed by the ts* and t* laws. In the present part, the analysis is extended to multi-cell tubes with openings, open tubes with or without St. Venant torsional stiffness, and to tubes formed by joining elements of different cross-sections. To illustrate the theory a numerical example of the stressing of a four-boom wing consisting of seven joined elements is fully worked out. Finally, an appendix gives practical methods of dealing with tubes which do not conform to the ts* and t* laws, and of finding approximate solutions for four-boom tubes with direct stress carrying covers.

Other

Research Article

  • The Weight of Seaplane Floats

  • L. W. Rosenthal
  • Published online by Cambridge University Press:
    28 July 2016, pp. 906-910

  • Although floatplanes were not popular during the war years, new types have made their appearance since, and presumably, for certain classes of work, more will be seen in the future. With this in mind, this paper is presented in the hope that it may help in assessing the float weights on any new designs that are contemplated. Some suggestions are included concerning geometry and design which, if adopted, may help to show a higher weight efficiency than existing practice.

    The paper is based upon an analysis of the weight and geometrical data relating to a large number of floats, although since the number built during recent years is small, a certain amount of data, which might possibly be considered old by some standards, has been incorporated. As will be seen by the curves, recent practice shows no radical departure from earlier years and the inclusion of the early data to establish design trends would appear to be warranted.

Reviews

Evening Session—Chairman Dr. H. Roxbee Cox

Meeting Report

Reviews

Afternoon Session: The Constructors' Approach to the Problem

Helicopter Discussion

Reviews

Correspondence

Reviews

Evening Session—Chairman Dr. H. Roxbee Cox

Helicopter Discussion

Correspondence

Review

Page 3 of 6