The NACA: A Look Back
In this photo taken on March 15, 1929, a quartet of NACA staff conduct tests on airfoils in the Variable Density Tunnel, which, in 1985, was declared a National Historic Landmark. (l to r) Eastman Jacobs, Shorty Defoe, Malvern Powell, and Harold Turner.
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https://www.nasa.gov/image-detail/naca-look-back/
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