Wind Tunnel
A drawing of a fan blowing yellow strips of paper across a helicopter inside a wind tunnel

NASA tests aircraft in wind tunnels. Image Credit: NASA

      a tunnel area through which air is blown to check how air flows around an object (such as an airplane part or model) placed in the tunnel

Engineers found a problem when the airplane model was tested in the wind tunnel.

The Wright brothers tested their airplane in a wind tunnel before flying it.

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What Are Wind Tunnels? Grades K-4
What Are Wind Tunnels? Grades 5-8