8×6 Supersonic Wind Tunnel - NASA
The 8- by 6-Foot Supersonic Wind Tunnel (8×6) operates either in an aerodynamic closed-loop cycle, testing aerodynamic performance models, or in a propulsion open-loop cycle that tests live fuel-bu...

Source: NASA
The 8- by 6-Foot Supersonic Wind Tunnel (8×6) operates either in an aerodynamic closed-loop cycle, testing aerodynamic performance models, or in a propulsion open-loop cycle that tests live fuel-burning engines and models.