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Brazilian ironclad Rio de Janeiro
The Brazilian ironclad ''Rio de Janeiro'' was an armored gunboat ((ポルトガル語:Canhoneira Couraçada) Nr. 3) built for the Brazilian Navy during the Paraguayan War in the mid-1860s. Like the other two gunboats she was built in Brazil and was designed as a casemate ironclad. Commissioned in April 1866, the ship did not enter combat until September, when she bombarded Paraguayan fortifications at Curuzu. ''Rio de Janeiro'' hit two mines on 2 September and rapidly sank, taking 53 of her crew with her.
==Design and description==
''Rio de Janeiro'' was designed to meet the need of the Brazilian Navy for a small, simple, shallow-draft armored gunboat capable of withstanding heavy fire. A casemate ironclad design was chosen for ease of construction and a bronze ram, long, was fitted. The hull was sheathed with Muntz metal to reduce biofouling. For sea passages the ship's freeboard could be increased to by use of removable bulwarks high. On riverine operations, the bulkwarks and the ship's masts, were usually removed.〔Gratz, p. 144〕
The ship measured long overall, with a beam of and had a mean draft of . ''Rio de Janeiro'' normally displaced and at deep load. Her crew numbered 148 officers and men.〔
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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