![Two men stand at the end of a large circular honeycombed screen](https://www.nasa.gov/wp-content/uploads/2023/03/312917main_GPN-2000-001296_full.jpg)
NASA Langley’s First Wind Tunnel
The honeycombed, screened center of this open-circuit air intake for Langley's first wind tunnel insured a steady, nonturbulent flow of air. Two mechanics pose near the entrance end of the actual tunnel, where air was pulled into the test section through a honeycomb arrangement to smooth the flow.
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https://www.nasa.gov/image-detail/nasa-langleys-first-wind-tunnel/
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