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Experimental Aerodynamics of a Two-Dimensional Sail


Dayman, Bain (1953) Experimental Aerodynamics of a Two-Dimensional Sail. Engineer's thesis, California Institute of Technology. doi:10.7907/7GWF-WA96.


Some basic low-speed aerodynamic characteristics of a two-dimensional sail located between endplates were obtained during these investigations for two sail sizes. The effects of the amount of camber (resulting from variation of the slack in the sail) upon the lift, drag, and pitching moment of a sail constituted the major portion of these investigations. A limited study on the advantages of a sail with a jib was made for one particular jib location and camber. Ideally, the results should be independent of sail size. The results of these investigations, although not quite identical, are consistent for the two sail sizes. As the camber (measured in percent of length of the sail perpendicular to the leading edge) increased from zero to 10%, the maximum lift increased from 0.92 to a maximum of 1.7 and remained fairly constant as the camber increased to 23%, then it decreased to 1.5 as the camber further increased to 27%. The maximum ratio of lift to drag at maximum lift occurred at 7% camber. The addition of the jib did not affect the maximum lift relationship with the camber, but it did increase the lift to drag ratio at maximum lift.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautical Engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Millikan, Clark Blanchard
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1953
Record Number:CaltechETD:etd-04292003-113154
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1540
Deposited By: Imported from ETD-db
Deposited On:06 May 2003
Last Modified:18 May 2023 22:19

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PDF (Dayman_b_1953.pdf) - Final Version
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