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Volume 27 - October 1923

Contents

Page 4 of 4

Other

Letter

  • Correspondence

  • H. Bouché
  • Published online by Cambridge University Press:
    24 August 2017, p. 319
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Fifth Meeting, 58th Session

Proceedings

Other

Correspondence

Research Article

  • The Effect of Variable Gearing on Aeroplane Performance

  • Annie D. Betts
  • Published online by Cambridge University Press:
    24 August 2017, pp. 557-560

  • It has been shown that considerable improvement may be made in the performance of an aeroplane by the use of an airscrew, the pitch of which can be varied. The matter was discussed by Mr. H. A. Mettam in R. and M. 577, Part II. There are, however, certain pratical drawbacks to the use of a variable pitch airscrew. Such an airscrew is expensive to construct and probably more liable to breakage or derangement in flight than the ordinary type. It also imposes on the pilot the necessity of making constant and accurate use of the variable pitch control, if the full advantages of the system are to be obtained.

    The present writer considered, therefore, that it might be worth while to inquire whether a similar improvement in performance could not be obtained by other and simpler means, namely, by the use of variable gearing between the engine and airscrew (the latter being of the usual fixed pitch type). The calculations have been made for the same machine as was used to illustrate R. and M. 577, the S.E.5 with Wolseley Viper engine. As in the variable pitch airscrew calculations, the weight has been increased from 1,976lbs. to 2,000lbs., thus allowing 24lbs. for the weight of the gearing.

Correspondence

Reviews

Other

Reviews

Other

Front matter

  • AER volume 27 issue 156 Cover and Front matter

  • Published online by Cambridge University Press:
    14 September 2016, pp. f1-f4
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Reviews

Back matter

  • AER volume 27 issue 156 Cover and Back matter

  • Published online by Cambridge University Press:
    14 September 2016, pp. b1-b2
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Page 4 of 4