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211558 results in Engineering

Page 2110 of 10578

  • Stresses in Single-Spar Wing Constructions with Incompletely Built-Up Ribs*

  • F. Reinitzhuber
  • Journal:
    The Aeronautical Journal / Volume 45 / Issue 363 / March 1941
    Published online by Cambridge University Press:
    28 July 2016, pp. 104-116

  • The constructional elements of single-spar wing structures are main spars, torsion tubes, ribs, and auxiliary spars. The ribs, which generally extend over the entire wing section, are for the purpose of stiffening the torsion tubes and taking up the forces in the torsion tubes and in the main spar. Mounted structures in the wing, engine, and landing gear often make it necessary to build up only one-half of the wing cross section completely with flanges and webs as a flexural supporting member. The other half of section is then omitted entirely or only the flanges are retained.

  • A Combination of the Quasi-Cylinder and Slender Body Theories

  • C. H. E. Warren, L. E. Fraenkel
  • Journal:
    The Aeronautical Journal / Volume 59 / Issue 532 / April 1955
    Published online by Cambridge University Press:
    28 July 2016, pp. 305-308

  • The Quasi-Cylinder and slender body theories for the supersonic flow past bodies of revolution have been much used in recent years because, for reasonably simple body profiles, these theories permit a simple and rapid calculation of the first-order pressure distributions and aerodynamic forces. It is assumed in both theories that the body profile slope is small; in the quasi-cylinder theory it is also assumed that the body radius is nearly constant, whereas in the slender body theory it is assumed that the thickness ratio of the body (maximum diameter/length) is small.

    In the present note these two theories are combined completely. From a strictly mathematical point of view nothing is gained by this combination, and, furthermore,application of the combined theory to a particular case is in general a little more laborious than application of either of the original theories.

  • Letter

  • S. P. Langley
  • Journal:
    The Aeronautical Journal / Volume 31 / Issue 196 / April 1927
    Published online by Cambridge University Press:
    28 July 2016, p. 275
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  • Correspondence

  • B. C. Carter
  • Journal:
    The Aeronautical Journal / Volume 34 / Issue 229 / January 1930
    Published online by Cambridge University Press:
    28 July 2016, p. 144
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  • Wind Tunnel Balance Design— The Simultaneous Measurement of Forces and Moments

  • C. G. Saunders
  • Journal:
    The Aeronautical Journal / Volume 58 / Issue 518 / February 1954
    Published online by Cambridge University Press:
    28 July 2016, pp. 141-143

  • An electro-mechanical method of simultaneous component separation is suggested as an alternative to mechanical systems. Based on the commonly used weighbeam, employing a motor driven leadscrew, poise weight, selsyn repeater circuit and counter, component separation is proposed by means of the selsyn differential circuit.

    The use of the selsyn motor as a direct or differential telemeter mechanism is well known, and as such, has many industrial applications. Such use, applied to the aerodynamic balance, offers the advantage of avoiding many of the difficulties associated with design and in particular, the construction of a mechanically independent and simultaneous measuring instrument.

Page 2110 of 10578