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Space History Photo: Submarine Model in the NTF

space history, NASA, wind tunnels
A submarine is shown being tested in one of NASA's wind tunnels.
(Image: © Paul Bagby.)

In this historical photo from the U.S. space agency, a navy submarine is shown undergoing tests in the National Transonic Facility on Oct. 3, 1986. Because air works in the same way as a liquid, it can be used to simulate the effects of water on a submarine hull.

Each weekday, SPACE.com looks back at the history of spaceflight through photos (archive).

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