![]() Delighted with the tests of the new 5-inch/38 dual purpose guns, whose performance was far better than the 5-inch/25 open single gun mounts used in the previous ships of The last two cruisers of the Brooklyn Class incorporated a significant change. The first four of the class were ordered on Augunder FY1934. The design proved to be excellent sea boats and were dry with a smooth roll. The tripod masts of earlier designs were replaced by light pole masts. This was a far superior design to having the hangar and aircraft midship where time after time it proved to be an extreme fire hazard. Place the hangar underneath the quarterdeck with catapults at deck edge between the hangar opening and hull sides. The design was flush deck for the first time. Complement was initially 52 officers and 816 crewmen but by 1945 it had swelled to 80 officers and 1,116 crewmen. End internal armored bulkheads tied in with theīelt armor were 5-inches thick. Turrets had maximum armor of 6.5-inches and barbettes 6-inches. The armor belt ranged from 3.5-inches to 3.25-inches. Mk 34ĭirectors were fitted for the main guns and Mk 33 directors for the secondary. Secondary guns were eight 5-inch/25 dual purpose guns in open mounts and a light antiaircraft battery of eight. Range was 26,1000-yards at the maximum elevation of 47.5 degrees. The guns used a new super heavy shell of 130 pounds (59kg), which had almost twice the penetration power of the Newly designed gun was capable of eight to ten rounds per minute, compared to the two rounds per minute of USN eight inch guns. She was armed with fifteen fast firing 6/47-inch guns Mk 16 in five turrets arranged as in the Mogami Class with the third turret capable of only broadside fire. ![]() The result was the Brooklyn Class, which marked a number of firsts. The fifth turret complicated the aircraft handling characteristics, which had always been placedĪmidship. Resistance and would allow the maximum speed of 32.5-knots on 93,500 horsepower instead of the 107,000 horsepower required with a shorter hull. As designs were formulated it was discovered that by lengthening the hull from 578-feet as in New Orleans to 600-feet a better design could be produced that would allow less water The starting point was the New Orleans Class design. The quadruple turret was considered risky to develop so the five triple gun turret design was On Mathe USN requested designs for a cruiser with fifteen 6-inch guns in triple turrets or sixteen guns in four quadruple turrets on 10,000-tons. They did fudge on the proclaimed displacement of 8,500-tons, as the class far exceeded the 10,000-ton treaty limit. Japan got the ball rolling when they announced that they would build the Mogami Class armed with fifteen 6.1-inch guns They both had the vast distances of the Pacific Ocean with which to contend. US were enamored with the idea of small cruisers. Use their allowable light cruiser tonnage to build cruisers in the 6,000-ton to 8,000-ton range, which was exactly what the British wished to build, as their greatest need was their quantity of cruisers, not individual quality. The Royal Navy had anticipated that the USN and Imperial Japanese Navy would Treaty of light cruiser, determined by gun size of main guns under 6.1-inches, and not by displacement, opened up a fertile ground for future USN cruiser development. Under the weight of the Washington Conference of 1930, the United States Navy had little tonnage left for the construction of cruisers armed with 8-inch guns, now typed as heavy cruisers under the treaty.
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