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A Theoretical Investigation of the Effect of Upwash and Camber on Drag Due to Lift for Rectangular Wings at Supersonic Speeds


Seidman, Oscar (1955) A Theoretical Investigation of the Effect of Upwash and Camber on Drag Due to Lift for Rectangular Wings at Supersonic Speeds. Engineer's thesis, California Institute of Technology. doi:10.7907/AMQ1-JJ66.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. A theoretical investigation was conducted, using linearized theory, to determine the combined effects of upwash and camber on drag due to lift for rectangular wings at supersonic speeds. Both the case of body upwash and the case of a uniform upwash field were considered. Previous studies have shown that body upwash and wing camber, acting separately, each reduce the drag due to lift for a rectangular wing. In the present investigation it was found that the individual effects as measured by the criterion [...] are additive and that there is a further gain which increased with decreasing aspect ratio. For the basic wing-body configuration investigated, with wing having a reduced aspect ratio of two, the upwash effect was much larger than the camber effect. For a complete aircraft configuration with lifting nose, optimum camber reduced the drag at a given lift by a somewhat smaller percentage than it did for an isolated wing. The analysis further indicated that use of moderate negative wing incidence could reduce aircraft drag at a given 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):
  • Lagerstrom, Paco A.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1955
Record Number:CaltechETD:etd-01212004-103434
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:259
Deposited By: Imported from ETD-db
Deposited On:22 Jan 2004
Last Modified:06 Jul 2023 20:50

Thesis Files

PDF (Seidman_o_1955.pdf) - Final Version
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