Photo #: S-511-51-C "Scheme "B-IV" - Destroyer Study" Preliminary design plan prepared for the General Board as part of the process leading to the Allen M. Sumner (DD-692) class design. This 30 September 1941 plan, for a 2195-ton (standard displacement) ship, provides two twin 5"/38 dual-purpose gun mounts forward, four twin 40mm anti-aircraft guns on the corners of a large after deckhouse, and two triple torpedo tube mountings. The original plan is in the 1939-1944 "Spring Styles Book" held by the Naval Historical Center. U.S. Naval Historical Center Photograph. Online Image: 367KB; 3000 x 1695 pixels