A U.S. Navy Boeing PB-1(W) <i>Fortress</i> (BuNo 34106, Douglas-Long Beach built B-17F-75-DL, USAAF s/n 42-3521) carrying a 4:10 F8F <i>Bearcat</i> 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.
U.S. Navy
circa 1947 <div style="display: none;">date QS:P,+1947-00-00T00:00:00Z/9,P1480,Q5727902</div>
<a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/department_arch.html">U.S. Navy All Hands magazine</a> <a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/archpdf/ah194706.pdf">June 1947</a>, p. 35. Official U.S. Navy photo <a rel="nofollow" class="external text" href="http://www.history.navy.mil/our-collections/photography/numerical-list-of-images/nhhc-series/nh-series/NH-89000/NH-89166.html">NH 89166</a> from the U.S. Navy <a rel="nofollow" class="external text" href="http://www.history.navy.mil">Naval History and Heritage Command</a>