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USS ''Ozark'' was a single-turreted river monitor built for the United States Navy during the American Civil War. The ship served in the Mississippi River Squadron during the war, and participated in the Red River Campaign shortly after she was commissioned in early 1864. ''Ozark'' patrolled the Mississippi River and its tributaries after the end of the campaign for the rest of the war. She was decommissioned after the war and sold in late 1865. The ship's activities or owner are not known after her sale, but ''Ozark'' transported Federal troops and New Orleans police attempting to apprehend the white supremacists who killed a large number of blacks during the Colfax Massacre in 1873. She ferried witnesses back and forth to their homes on the Red River during the subsequent trials in 1874. Her ultimate fate is unknown. ==Description== The ship was long overall and had a beam of .〔Silverstone, p. 111〕 She had a depth of hold of 〔Canney, p. 110〕 and a draft of six feet. ''Ozark'' had a tonnage of 578 tons burthen.〔 She was powered by a pair of two-cylinder steam engines,〔 each driving two four-bladed, propellers, using steam generated by four boilers. The engines were designed to reach a top speed of . They had a bore of and a stroke of .〔 ''Ozark'' could carry about of coal. All of the machinery was built by the Franklin Foundry of St. Louis, Missouri.〔 The ship was fitted with three rudders,〔Canney, pp. 110–11〕 and the armored pilothouse was mounted on top of the gun turret.〔 The officers' staterooms were built on deck out of light pine, and a hurricane deck was positioned between the turret and the deckhouse, between the two funnels. The hull was subdivided by three transverse and three longitudinal watertight bulkheads.〔 ''Ozark''s main armament initially consisted of two smoothbore, muzzle-loading Dahlgren guns mounted in a twin-gun turret forward.〔 The 11-inch gun weighed and could fire a shell up to a range of at +5° elevation.〔Olmstead, et al, pp. 90, 94〕 By July 1864, her armament had been reinforced by the addition of one Dahlgren gun and three Dahlgrens, all on pivot mounts. One of these guns was mounted at the bow, another at the stern and the two others were abreast the deckhouse, one on each broadside.〔Canney, p. 111〕 The 10-inch Dahlgren weighed and could fire a shell up to a range of at +19° elevation. The nine-inch gun weighed and could fire a shell to a range of at an elevation of +15°.〔Olmstead, et al, pp. 87–88〕 ''Ozark'' was chosen as the testbed for an experimental "underwater battery" that consisted of a nine-inch Dahlgren gun firing through a pipe in the side of the hull below the waterline. Cost overruns caused the project to be cancelled in January 1863 before it could be tested.〔 The cylindrical Ericsson-style turret was armored with six layers of wrought iron plates. The forward of the hull was protected by two layers of plates that extended below the waterline. Aft of the bow section, the hull's armor consisted of two layers of plates. The ship's deck was protected by iron plates one inch thick.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「USS Ozark (1863)」の詳細全文を読む スポンサード リンク
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