The National Full-Scale Aerodynamics Complex at NASA’s Ames Research Center is the largest wind tunnel in the world. At 80 by 120 feet, the open-circuit wind tunnel draws air in through the 360 foot wide by 130 foot high air intake. The air then goes through the 120 foot wide by 80 foot tall test section — big enough to hold a full scale Boeing 737 — at speeds up to 115 mph before being exhausted to the atmosphere. Six 40 foot diameter fan blades driven by 23,500 hp motors are responsible for moving the air.
Frankly, all that is great, but the air intake looks damn sexy with a sunset in the background.
Power is derived from six 40-foot diameter fan blades, each motor rated at 23,500 hp. The wind tunnel began regular operations in 1987.
[Image Credit: me! (sorry it's a bit blurry)]