NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY
Mach 2.5 wind tunnel. Observation window showing the inside of a high-speed wind tunnel. This is the Mach 2.5 wind tunnel, designed to test at supersonic speeds of up to 2.5 times the speed of sound (Mach 1). Photographed in the Engineering Building at the National Physical Laboratory, Teddington, UK.
Model release not required. Property release not required.