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| Keywords: Boeing PB-1 Fortress with model F8F plane for supersonic speed tests in 1947.jpg A U S Navy Boeing PB-1 W Fortress BuNo 34106 Douglas-Long Beach built B-17F-75-DL USAAF s/n 42-3521 carrying a 4 10 F8F Bearcat model plane in flight near the U S Naval Air Experimental Station at Philadelphia Pennsylavania USA The model plane was contructed out of wood and carried a 227 kg lead weight and radio telemeting equipment Using automated controls the model was dropped to attain speeds of 1 000 kph to test the effects of supersonic speeds upon aircraft After its test flight the model deployed a parachute for a safe landing The aircraft is marked Naval Air Experimental Station N A M C Phila PA http //www navy mil/ah_online/department_arch html U S Navy All Hands magazine http //www navy mil/ah_online/archpdf/ah194706 pdf June 1947 p 35 Official U S Navy photo http //www history navy mil/our-collections/photography/numerical-list-of-images/nhhc-series/nh-series/NH-89000/NH-89166 html NH 89166 from the U S Navy http //www history navy mil Naval History and Heritage Command ca 1947 U S Navy PD-USGov-Military-Navy Boeing PB-1W B-17F Naval Air Materiel Center Philadelphia | ||||
