(NASA Langley Research Center Photograph.) black-and-white photos Seversky P-35 at Langley May 10, 2013by Lone_Sentry_Admin1 min read A Seversky P-35 used for NACA research at the Langley Aeronautical Laboratory at Hampton, Virginia, August 1939. (NASA Langley Research Center Photograph.) (NASA Langley Research Center Photograph.)