NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY NATIONAL PHYSICAL LABORATORY (C) CROWN COPYRIGHT / SCIENCE PHOTO LIBRARY
Compressed air tunnel. View of the air screw from the inside of a compressed air tunnel. This device produced wind speeds of up to 60 miles per hour and was used to carry out test work for the British aircraft industry. Photographed at the National Physical Laboratory, Teddington, UK.
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