关于这张图
Screwjacks located on the exterior of the second throat section in the 10- by 10-Foot Supersonic Wind Tunnel at the National Aeronautics and Space Administration (NASA) Lewis Research Center. The 10- by 10 tunnel was the most powerful propulsion wind tunnel in the country when it began operating in 1956. The facility can generate wind speeds from Mach 3 to 3.5. A flexible wall nozzle located just upstream from the test section can be adjusted using screw jacks to produce the desired air flow. The 61-foot long second throat, seen here from the outside, was located just beyond the test secti…
