Keywords: Douglas XT3D-1 with folded wing 1931.jpeg A U S Navy Douglas XT3D-1 BuNo 8730 pictured on the ground at an unidentified location in June 1931 <br>The Douglas T3D was ordered as a successor for the Martin T4M and Great Lakes TG torpedo-bombers It featured folding wings and a forward-looking window in the fuselage to assist in the aiming of ordnance It was delivered to the U S Navy in 1931 but flight testing revealed inadequate performance particularly with the Pratt Whitney Hornet S2B1-G engine Subsequently the aircraft was equipped with a Pratt Whitney XR-1830-54 and enclosed cockpits The aircraft was then re-designated XT3D-2 and delivered to the U S Navy in 1933 by which time the service had shifted its attention to dive-bombing The aircraft remained in use as an engine test bed until 1941 at which time it was stricken from the U S Navy inventory http //collections naval aviation museum/emuwebdoncoms/pages/doncoms/AdvQuery php U S Navy National Museum of Naval Aviation photo No http //collections naval aviation museum/emuwebdoncoms/pages/doncoms/Display php irn 16036234 QueryPage 2Femuwebdoncoms 2Fpages 2Fdoncoms 2FAdvQuery php 1996 253 865 1931-06-24 U S Navy PD-USGov-Military-Navy Douglas T3D Backwards-folding wings |