"It was used for calibrating airspeed instruments and testing airfoils. The item to be evaluated was placed in the choke-throat and viewed through the glass door. During operation, the air was drawn into the small end of the tunnel and exhausted from the large end where the fan was located."
July 22, 2013 4:00 AM PDT
Photo by: Daniel Terdiman/CNET
| Caption by: Daniel Terdiman
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