Английская Википедия:Brazilian monitor Rio Grande
Шаблон:Infobox ship imageШаблон:Infobox ship careerШаблон:Infobox ship characteristics
The Brazilian monitor Rio Grande was the second ship of the Шаблон:Sclass river monitors built for the Imperial Brazilian Navy during the Paraguayan War in the late 1860s. Rio Grande participated in the Passage of Humaitá on 19 February 1868 and provided fire support for the army for the rest of the war. The ship was assigned to the Upper Uruguay (Шаблон:Lang-pt) flotilla after the war. Rio Grande was scrapped in 1907.
Design and description
The Pará-class monitors were designed to meet the need of the Brazilian Navy for small, shallow-draft armored ships capable of withstanding heavy fire. The monitor configuration was chosen as a turreted design did not have the same problems engaging enemy ships and fortifications as did the casemate ironclads already in Brazilian service. The oblong gun turret sat on a circular platform that had a central pivot. It was rotated by four men via a system of gears; 2.25 minutes were required for a full 360° rotation. A bronze ram was fitted to these ships as well. The hull was sheathed with Muntz metal to reduce biofouling.[1]
The ships measured Шаблон:Convert long overall, with a beam of Шаблон:Convert. They had a draft between of Шаблон:Convert and displaced Шаблон:Convert.[2] With only Шаблон:Convert of freeboard they had to be towed between Rio de Janeiro and their area of operations.[1] Their crew numbered 43 officers and men.[2]
Propulsion
The Pará-class ships had two direct-acting steam engines, each driving a single Шаблон:Convert propeller. Their engines were powered by two tubular boilers at a working pressure of Шаблон:Convert. The engines produced a total of Шаблон:Convert which gave the monitors a maximum speed of Шаблон:Convert in calm waters. The ships carried enough coal for one day's steaming.[3]
Armament
Rio Grande carried a single 70-pounder Whitworth rifled muzzle loader (RML) in her gun turret. The 70-pounder gun had a maximum elevation of 15°. It had a maximum range of Шаблон:Convert.[4] The 70-pounder gun weighed Шаблон:Convert and fired a Шаблон:Convert shell that weighed Шаблон:Convert.[5] Most unusually the gun's Brazilian-designed iron carriage was designed to pivot vertically at the muzzle; this was done to minimize the size of the gunport through which splinters and shells could enter.[6]
Armor
The hull of the Pará-class ships was made from three layers of wood that alternated in orientation. It was Шаблон:Convert thick and was capped with a Шаблон:Convert layer of peroba hardwood. The ships had a complete wrought iron waterline belt, Шаблон:Convert high. It had a maximum thickness of 102 millimeters amidships, decreasing to Шаблон:Convert and Шаблон:Convert at the ship's ends. The curved deck was armored with Шаблон:Convert of wrought iron.[1]
The gun turret was shaped like a rectangle with rounded corners. It was built much like the hull, but the front of the turret was protected by Шаблон:Convert of armor, the sides by 102 millimeters and the rear by 76 millimeters. Its roof and the exposed portions of the platform it rested upon were protected by 12.7 millimeters of armor. The armored pilothouse was positioned ahead of the turret.[1]
Service
Rio Grande was laid down at the Arsenal de Marinha da Corte in Rio de Janeiro on 8 December 1866, during the Paraguayan War, which saw Argentina, Uruguay and the Empire of Brazil allied against Paraguay. She was launched on 17 August 1867 and completed on 3 September 1867. She arrived at Montevideo on 6 January 1868 and steamed up the Paraná River, although her passage further north was barred by the Paraguayan fortifications at Humaitá. On 19 February 1868 six Brazilian ironclads, including Rio Grande, sailed past Humaitá at night. Rio Grande and her two sister ships, Шаблон:Ship and Шаблон:Ship, were lashed to the larger ironclads in case any engines were disabled by the Paraguayan guns. Шаблон:Ship led with Rio Grande, followed by Шаблон:Ship with Alagoas and Шаблон:Ship with Pará. The latter two ships were damaged as they sailed past the fortifications and had to be beached to prevent them from sinking. Rio Grande continued upstream with the other undamaged ships and they bombarded Asunción on 24 February.[7] On 23 March Rio Grande and Barroso sank the Paraguayan steamer Igurey.[8] Paraguayan soldiers in canoes attempted to board both ships on the evening of 9 July, but were only successful in getting on board Rio Grande where they were able to kill Antônio Joaquim, the ship's captain and some of the crew. The remaining crewmembers locked the monitor's hatches and Barroso was able to kill or capture almost all of the Paraguayans on deck.[9] On 15 October she bombarded the Angostura Fort in company with Шаблон:Ship, Шаблон:Ship, Pará and her sister Шаблон:Ship.[8]
After the war Rio Grande was assigned to the newly formed Alto Uruguay Flotilla, based at Itaqui. She was docked in Ladário for rebuilding in 1899, but this was never completed and she was scrapped in February 1907.[8]
Footnotes
References
External links
Шаблон:Pará class ironclad Шаблон:Brazilian ironclads
