![A television camera is focused by a NACA technician on a ramjet engine model through the schlieren optical windows of the 10- by](https://www.nasa.gov/wp-content/uploads/2023/03/430887main_naca_tvcamera_full.jpg)
The NACA: A Look Back
A television camera is focused by a NACA technician on a ramjet engine model through the schlieren optical windows of the 10- by 10-Foot Supersonic Wind Tunnel.
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https://www.nasa.gov/image-detail/naca-look-back-12/
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