One of the two 34-foot-diameter fans in the 16-Foot Transonic Tunnel at Langley Research Center. The second fan is partially visible in the background. Note the Sitka spruce blades, which were used in many wind tunnels. Image # : L-1990-04065 Date: March 31, 1990

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Size: 2034px × 1641px
Photo credit: © NC Collections / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 16-foot, center, langley, research, transonic, tunnel, wind