The engineering plant was replaced in 1942. Unfortunately, the specially built engines failed to produce their design power, and some developed dangerous crankcase explosions. V-5 and her near-sisters V-4 ( Argonaut) and V-6 ( Nautilus) were initially designed with larger and more powerful MAN-designed diesel engines than the Busch-Sulzer engines that propelled earlier V-boats, which were failures. A raised gun platform was provided around the conning tower, and deck stowage for spare torpedoes was included under the platform and in the superstructure. The design was possibly influenced by the German "U-cruisers" of the Type U-139 and Type U-151 U-boat classes, although V-4, V-5, and V-6 were all larger than these. This factor, and the implications of the 1922 Washington Naval Treaty, suggested the need for long-range submarine "cruisers", or "strategic scouts", as well as long-range minelayers, for which long endurance, not high speed, was most important. The configuration of V-4, V-5, and V-6 resulted from an evolving strategic concept that increasingly emphasized the possibility of a naval war with Japan in the far western Pacific. V-5 was generally similar to the preceding submarine minelayer V-4, although slightly smaller and lacking a minelaying system. USS Narwhal under construction at Portsmouth Naval Shipyard, 1927 She was named V-5 (SC-1) when her keel was laid down on by the Portsmouth Navy Yard in Kittery, Maine.ĭesign V-5 a.k.a. USS Narwhal (SS-167), the lead ship of her class of submarine and one of the " V-boats", was the second ship of the United States Navy to be named for the narwhal. 2 × 6-inch (152 mm)/53 caliber guns Mark XII Mod. (four external tubes were added 1942-3 provision for 8–12 additional torpedoes externally) : 31.6 × 21-inch (533 mm) torpedo tubes (four forward, two aft 24 torpedoes including 6 in deck stowage) : 31.As Built: 9 officers, 10 petty officers, 70 enlisted : 305–11.2 × Westinghouse electric motors, 1,270 hp (950 kW) each,.Re-engined 1942: 4 × General Motors Winton Model 16-278A 16-cylinder two-cycle diesel-electric diesel engines, 1,600 hp (1,200 kW) each, : 210 : 180.As Built: 2 × BuEng-built, MAN-designed> : 57 direct-drive main diesel engines, 2,350 hp (1,750 kW) each,.Portsmouth Naval Shipyard, Kittery, Maine : 285–304
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