Experiments in Aerodynamics Volume 27, No. 1

Experiments in Aerodynamics Volume 27, No. 1

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ... 25, 26, December 5 and 11, and comprised over 80 individual experiments. The detailed observations of both series are presented in Tables XIV and XV, placed at the end of this chapter. The column headed "description of planes" gives the dimensions and weight of the planes. The aspect of the plane--i.?., its position with respect to the The square foot was adopted as a unit in the earliest experiments, and its use has been continued as a matter of experimental convenience, owing to considerations bearing upon the uniformity of apparatus. Were these experiments to be recommenced, I should prefer to use C. G. S. (or at least metric) units throughout. Third, many of the curves show a tendency to reach a minimum point for an inclination of the planes of about 30, the highest angle at which these planes were used. It was, therefore, seen to be desirable to extend the angles of inclination far enough to include the minimum point of the curve within the range of observation. This was done in the case of four of the planes whose results are plotted in Fig. 9. In examining these curves, it will be seen that the minimum point falls between 25 and 35. It should also be noted that the change in the soaring speed is quite small for settings between 25 and 40, and that in a number of individual observations the real character of the curve over this range was masked by the errors introduced by wind and weather. Since the planes whose results are plotted in Fig. 9 all have the same weight per unit area, the difference in their soaring speeds arises solely from their difference of size, shape, or aspect. The effect of shape and aspect indicated in Fig. 8 is beautifully exhibited and amply confirmed in the six comparable curves of Fig. 9. For low...show more

Product details

  • Paperback | 34 pages
  • 189 x 246 x 2mm | 82g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236925009
  • 9781236925008