NASA NTRS · 19930090720
A method for the direct determination of wing-section drag
Abstract
In order that the method may be more easily understood, we will first consider the simpler case when there is no lift, but only drag, and when the streamlines at the measuring point behind the obstacle are nearly parallel. Moreover, the flow is assumed not to deviate much from the two-dimensional flow.
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Betz, A. 1925-11-01. A method for the direct determination of wing-section drag. https://ntrs.nasa.gov/citations/19930090720
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