![Small tunnel test section.](https://www.nasa.gov/wp-content/uploads/2024/06/grc-1957-c-45993.jpg)
METAL PROTOTYPE MODELS IN SMALL TUNNEL – BLOCK TUNNEL INSPECTION
A metal prototype in the test section of a small supersonic wind tunnel in the NACA LEwis Engine Research Building (1957).
Image Credit: NASA
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https://www.nasa.gov/image-detail/grc-1957-c-45993/
Image CreditNASA
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