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USS Casco (1864)
The first USS ''Casco'' was the first of a class of twenty 1,175-ton light-draft monitors built by Atlantic Works, Boston, MA for the Union Navy during the American Civil War.
==Launch and refitting==
Upon her launching in May 1864, it was found that the design of these ships was seriously flawed. She was pronounced unseaworthy when nearly completed and on 25 June 1864 she was ordered to be converted to a torpedo vessel, without a turret or heavy guns. ''Casco'' was commissioned 4 December 1864, Acting Master C. A. Crooker in command.
John Ericsson developed the original design for the Casco class monitors, but Chief Engineer Alban C. Stimers, the General Inspector of Ironclads, elaborated it. When bids were requested for the ships, Assistant Secretary of the Navy Gustavus Fox wrote to Ericsson to confirm that Stimers had arranged the details with Ericsson’s approval. Ericsson replied that he had been kept in the dark and that Stimers had “frittered away” Ericsson’s principles, but in March 1863, Fox began to award contracts anyway. The vessels received another redesign in the aftermath of Rear Admiral Samuel F. Du Pont's failed attack on Charleston, SC, on 7 April 1863. Twenty vessels were ordered without serious scrutiny of the design. $14 million US was allocated for the construction of these vessels. It was discovered that Stimers and his assistant Theodore Allen had failed to compensate properly for the weight his revisions added to the original plan and this resulted in excessive stress on the hull and a freeboard of only . In June 1864, Stimers was removed from control of the project and Ericsson was called in to undo the damage. He was forced to raise the hulls of the monitors under construction by nearly two feet and the first few completed vessels had their turrets removed and a single pivot-mount Dahlgren cannon mounted. These same few vessels had a retractable spar torpedo added as well.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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