Tunnel Trials Air Force Cadet 2nd Class Eric Hembling uses a Ludwieg tube, a type of wind tunnel, to measure the pressures, temperatures and flow fields of basic geometric and hypersonic research vehicles at the U.S. Air Force Academy in Colorado Springs, Colo., Jan. 31, 2019. SHARE IMAGE: Download Image: Full Size (1.25 MB) Tags: Science, Air Force, Technology, hypersonics Photo By: Joshua Armstrong, Air Force VIRIN: 190131-F-NH566-0001Y.JPG Photo Gallery