Inside the World’s Largest Wind Tunnel

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It’s 80 feet high, 120 feet wide, that’s large enough to hold a Boeing 737. Now trucking companies are using the wind tunnel to make their massive machines more efficient.

The tunnel encloses 900 tons of air, 40 tons of which rush through the throat per second at maximum speed. Dwarfed by the immensity of the tunnel structure, the experimental model seen here is actually almost 50 feet long.

The tunnel can replicate the wind conditions of flight via six 22,500-horsepower motors with blades as tall as four-story buildings.

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That’s why Navistar showed up with its truck, which a crane dropped into place (the walls of the tunnel open up for easy access).

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SOURCEnasa.gov
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