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Two men wearing hats and long coats stand at the bottom of a massive circular tunnel. At the end of the tunnel is four rows of stacked panels: this are the turning vanes. In the middle of the rows, there is a dark, cylindrical shaft that connects to the tunnel walls. This image is in black and white.

Turning Vanes inside the Altitude Wind Tunnel

In this February 1944 publicity photo, men stand in front of turning vanes inside the Altitude Wind Tunnel (AWT) at the National Advisory Committee for Aeronautics Aircraft Engine Research Laboratory. The AWT was the only wind tunnel capable of testing full-size aircraft engines in simulated altitude conditions. A large wooden drive fan, located on the other side of these vanes, created wind speeds up to 500 miles per hour.

Image Credit: NASA

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Image CreditNASA
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