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Volume 64 - January 1960

Contents

Page 7 of 13

Reviews

The Library

Other

Reviews

The Library

Technical Notes

  • Supersonic Flutter of a Cylindrical Panel in an Axi–Symmetric Mode

  • D. J. Johns
  • Published online by Cambridge University Press:
    04 July 2016, pp. 362-363

  • In ref. 1 an extensive review was made of the panel flutter problem and analyses dealing with flutter of cylindrical shells of finite length were discussed in considerable detail. It was stated that one of the central points of controversy is in the choice of the appropriately simplified governing equations for the thin–walled elastic shell. Related to this is the choice of flutter mode and the question as to how the critical flutter speed depends upon the number of circumferential and axial waves in that mode.

    Stepanov and Strack and Holt found that the critical Mach number decreases with increasing number of circumferential waves, and Fung has concluded that the axially symmetric mode is of the greatest interest.

    The purpose of this note is to present a relatively simple analysis in which only axi–symmetric deformations of the shell are considered. The shell is assumed to be unreinforced longitudinally.

Other

Reviews

The Library

Technical Notes

  • The Hydro Biplane, Windermere, 1912

  • Herbert à Brassard
  • Published online by Cambridge University Press:
    04 July 2016, pp. 700-701

  • While staying at the “Old England Hotel” Bowness-on-Windermere at the end of May in 1912 one heard and then saw what was loosely called an aeroplane flying over the Lake. It is of some “historic” interest that the car which brought us to Bowness was a 45 h.p. six cylinder Napier San Giorgio model. The Hydro Biplane was garaged in rather untidy looking wooden sheds only some 100 yards from the Hotel and I have a clear recollection of the following facts. The photographs (Figs. 1 and 2) show it to be a single-engined pusher propeller biplane on one central float. It always flew at a height of about 100 yards at around 50-60 m.p.h. A little speedier “ downhill.” Taking off speed was about 50 m.p.h. The pilot (see Fig. 2), I never knew his name, flew two or three times a day in suitable weather garbed like the present day motor cyclist but without crash helmet.

Reviews

The Library

Other

Reviews

The Library

Other

Reviews

The Library

Page 7 of 13