Vought SU-2 Corsair: The Vought SU-2 Corsair was originally designated the O3U-4, but was reassigned to the scout category of naval aircraft. This SU-2 was tested in Langley's 30 x 60 Full Scale Tunnel in 1934. The enclosure around the engine is not the Langley-developed NACA cowling, but the less efficient Townend ring cowling.
