Pratt & Whitney J57 engine installed in the Altitude Wind Tunnel test section.
A P&W J57 engine is installed in the Altitude Wind Tunnel (AWT)'s 20-foot diameter test section in January 1957.
Image Credit: NASA/HARRY WALTON
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https://www.nasa.gov/image-detail/grc-1957-c-43690/
Image CreditNASA/HARRY WALTON
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