Cleveland-class cruiser
The Cleveland-class was a group of light cruisers built for the United States Navy during World War II. They were the most numerous class of light cruisers ever built. Fifty-two were ordered, and 36 were completed, 27 as cruisers and nine as the of light aircraft carriers. They were deactivated within a few years after the end of the war, but six were converted into missile ships, and some of these served into the 1970s. One ship of the class, USS Little Rock, remains as a museum ship.
Development
A development of the preceding , the Cleveland class was designed with increased cruising range, anti-aircraft armament, and torpedo protection compared with earlier U.S. cruisers.After the London Naval Treaty of 1930, the U.S. Navy took up a renewed interest in the 6-inch gun-armed light cruiser, partially due to the Navy complaining about the 8-inch gun's slow rate of fire of three rounds per minute compared to the ten rounds per minute of 6-inch guns. At this time, the U.S. Navy began to deploy drones to use as targets for anti-aircraft targets, which could simulate both dive and torpedo bombers. The simulations showed that without fire control directors and computers, the ships of the fleet would be almost helpless against the density of aircraft attacks envisioned in any future war. Mechanical computers alone could weigh up to 10 tons and had to be housed below decks for both weight and protection measures. As World War II was to prove, the pre-war assumptions were optimistic as eventually, every anti-aircraft gun platform above 20 mm would end up having remote power, with fire control and radar aiming.
As designed, the Cleveland class was already a tight design, but requests to widen the ship were turned down as it would affect production rates. Shortly after the Fall of France, the Two-Ocean Navy Act changed those production rates rapidly. In order to fit the new heavier fire control and radar systems within the allotted tonnage for a cruiser, the No. 3 gun turret was omitted. This also gave room for the enlargement of the bridge spaces to accommodate the new combat information center and necessary radars, along with enough tonnage to fit an additional pair of 5-inch/38 twin mounts, located fore and aft of the superstructure, with wider arcs of fire. Despite the loss of three 6-inch guns compared to the preceding Brooklyn and St. Louis classes, the more advanced fire control gave the Cleveland class a firepower advantage in practical use.
Towards the end of World War II, the increase of light anti-aircraft weapons made the class top-heavy, so to compensate, some ships had one of the two catapults, and No. 1 turret rangefinders removed. Top weight issues would plague the class with every addition of equipment having to be weighed against what would have to be removed. For example, the tighter installation of the control radar necessitated the removal of the 20 mm clipping rooms, where 20 mm rounds were loaded into their magazines.