Canadian Chinook
A Royal Canadian Air Force CH-147F Chinook is suspended above ground by cables in the Benefield Anechoic Facility Sept. 25. The BAF, operated by the 772nd Test Squadron, is the largest anechoic chamber in the world and can fit any aircraft inside. It provides a "free space" so electronic warfare tests can be conducted without radio frequency interference from the outside world. The chamber is filled with polyurethane and polyethylene pyramids designed to stop reflections of electromagnetic waves. (U.S. Air Force photo by Donald R. Allen)

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Photo by: Donald R. Allen |  VIRIN: 180925-F-BU402-0314.JPG