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Canadian Chinook
A Royal Canadian Air Force CH-147F Chinook is rolled into the Benefield Anechoic Facility Sept. 24. The BAF, operated by the 772nd Test Squadron, is the largest anechoic chamber in the world and can fit any aircraft inside. The chamber is filled with polyurethane and polyethylene pyramids designed to stop reflections of electromagnetic waves. The size of the pyramids, which are painted dark blue or black, varies depending on the particular frequency and test procedure being conducted. Aircraft systems can be tested and verified that they work properly prior to actual flight test. (U.S. Air Force photo by Kyle Larson)

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Photo by: Kyle Larson |  VIRIN: 180924-F-YN876-1126.JPG