There was too little time to develop an entirely new design, so Stark went back to the design for Helena and St. Louis. On October 2, 1939 Stark proposed that the CL-55 and CL-56 should be repeats of the St. Louis but substituting two more twin 5-inch/38 gun mounts for the deletion of the 3rd triple 6-inch turret of St. Louis. To speed up the process it was decided to have these two cruisers built in government yards to avoid the bidding process. Both were designated to be built by New York Shipbuilding. From the start there was concern about top weight of the cruisers and their inherent stability. One very important partial solution was suggested by the builder. With the Helena and St. Louis, their 3-inch armor belt inclined inwards at 2 degrees. The yard suggested that with the CL-55 and CL-56 the same belt should incline outwards at 6 degrees. This would provide more internal volume lower in the hull, enhancing stability. This suggestion was quickly accepted and gave the Clevelands a noticeable tumblehome lacking in the Brooklyn Class. The beam at waterline increased by 2.5-feet. In June 1940 the King Board recommended that new large ships should mount at least four quadruple 1.1-inch gun mounts. This recommendation was worked into the Cleveland design. However, none of the ships in the class every carried the Chicago Pianos. By mid-1941 it was realized that the 1.1-inch/75 was an unreliable gun system. The Bureau of Ordnance ordered that the 1.1-inch guns of Cleveland be replaced by twin 40mm/56 Bofors guns. Admiral Stark thought that he was overseeing the construction of only two light cruisers but with the advent of World War Two, the quantity of warships was a paramount concern. Eventually 52 cruisers of the Cleveland Class would be ordered with 29 finished as cruisers, 9 would be converted into light aircraft carriers,, one would be broken up in the yard and 13 would be cancelled at the end of the war. USS Cleveland CL-55 would be the only one of the class completed with four twin 40mm Bofors mounts. For USS Columbia CL-56 the AA fit changed to two twin Bofors mounts and two quadruple Bofors mounts.
USS Cleveland was laid down on July 1, 1940 at New York Shipbuilding in Camden, New Jersey, launched on November 1, 1941, and completed on July 29, 1942. Her length was 608-feet 4-inches overall and 600-feet at waterline, with a beam of 64-feet 4-inches and draft 24-feet 6-inches at deep load. Design displacement was 10,000-tons but actual full load displacement was 14,131-tons. Armament was twelve 6-inch/47 Mk 16 main guns (4x3), twelve 5-inch/38 DP secondary guns (6x2), eight 40mm/56 Mk 2 Bofors guns (4x2), and ten 20mm/70 Mk 2 Oerlikon guns. The armor belt ranged from 3.25-inches to 1.25-inches. A 2-inch armored deck was over machinery spaces and magazines. Four Babcock & Wilcox boilers supplied steam to four General Electric geared turbines, developing 109,458 horsepower for an actual maximum speed of 32.3-knots, instead of the designed 32.5-knots. Designed range was 11,000 nm at 15-knots but actual range was far less, 8,640 nm at 15-knots. (History from: The Modern Cruiser, The Evolution of the Ships that Fought the Second World War by Robert C. Stern, Seaforth Publishing 2020; U.S. Cruisers by Norman Friedman, Naval Institute Press 1984)
|
|