Ludwieg Tub
Air Force Cadet 2nd Class Eric Hembling uses a Ludwieg Tube to measure the pressures, temperatures and flow field of various basic geometric and hypersonic research vehicles at Mach 6 in the U.S. Air Force Academy's Department of Aeronautics, Jan. 31, 2019.

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Photo by: Joshua Armstrong, Air Force |  VIRIN: 190131-F-NH566-0004.JPG