<ul><li>The Altitude Wind Tunnel (AWT) at the National Advisory Committee for Aeronautics Aircraft Engine Research Laboratory became operational in 1944.</li><li>The AWT was the only wind tunnel capable of testing full-size aircraft engines in simulated altitude conditions.</li><li>The tunnel featured turning vanes in each corner to straighten the airflow and direct it around the corners.</li><li>The turning vanes were made up of 36 to 42 vertical vanes, each 2.5 feet long and half-moon shaped.</li></ul>

Turning Vanes inside the Altitude Wind Tunnel

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