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Volume 54 - Issue 479 - November 1950

Contents

Sixth British Commonwealth and Empire Lecture

  • Some International Aspects of Air Transport

  • George Cribbett
  • Published online by Cambridge University Press:
    28 July 2016, pp. 669-696

  • In accepting the invitation to address the Royal Aeronautical Society I am deeply conscious of the honour that has been paid to me and of the responsibility I have undertaken. My sense of responsibility flows from the realisation that I have been called upon to contribute from personal knowledge and experience to the great volume of recorded and authoritative opinion already contributed by these lectures.

    I have chosen to address you on some international aspects of air transport because it is my firm belief that the lack of an enlightened multilateral code in an important field of international air transport is one of the more serious impediments to the full exploitation of the technical advances with which air transport has been presented in recent years.

Research Article

  • A Comparative Study of the Noise from Turbo-Jet and Reciprocating Aircraft Engines in Flight

  • S. C. Ghose
  • Published online by Cambridge University Press:
    28 July 2016, pp. 697-707

  • Sources of noise in aircraft are discussed briefly with particular reference to the introduction of the turbo-jet engine.

    An account is given of a particular investigation made in a Lancastrian aircraft fitted with both turbo-jet and reciprocating engines. The equipment by which the noise spectrum was analysed over, an extended frequency band is described.

    The results are examined and the effects of the two types of engine on the noise spectrum are compared, under different representative conditions, in the forward and rear sections of the fuselage.

  • The Anticlastic Curvature of Rectangular Beams and Plates

  • D. G. Ashwell
  • Published online by Cambridge University Press:
    28 July 2016, pp. 708-715

  • The pure bending of a rectangular beam about an axis parallel to a principal axis of its cross-section is well understood if its depth d is comparable in magnitude with its breadth b. The usual theory, noticing the geometrical fact that at any cross-section the longitudinal strains of filaments of the beam are proportional to the distances of the filaments from some neutral axis parallel to the axis of bending, postulates that the longitudinal stresses will vary in the same way.

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