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The ''Commandant Rivière'' class was a class of frigates built for the French Navy in the late 1950s and early 1960s. Labeled "''aviso-escorteur''" (fr: "sloop-escort"), they were designed to perform the role of overseas patrol in peacetime and anti-submarine escort in wartime.〔 Four similar ships were built for the Portuguese Navy as the .〔Gardiner and Chumbley 1995, p. 319.〕 ==Design== The main gun armament of the ''Commandant Rivière'' class consisted of three of the new , with a single turret located forward and two turrets aft.〔〔Blackman 1962, p. 88.〕 These water-cooled automatic dual-purpose guns could fire a shell at an effective range of against surface targets and against aircraft at a rate of 60 rounds per minute.〔Friedman 1997, pp. 432–433.〕 A quadruple 305 mm anti-submarine mortar was fitted in 'B' position, aft of the forward gun and in front of the ship's superstructure,〔 capable of firing a depth charge to or in the shore bombardment role, a projectile to .〔Grove 1990, p. 55.〕 Two triple torpedo tubes were fitted for anti-submarine torpedoes, while the ship's armament was completed by two 30 mm cannon.〔 The ships had accommodation for an 80-man commando detachment with two fast landing boats, each capable of landing 25 men.〔Gardiner and Chumbley 1995, p. 118.〕 While the previous French frigates of the and classes were powered by steam turbines,〔Gardiner and Chumbley 1995, pp. 116–117.〕 because a long-range was required for the overseas colonial role of the ships, the class was instead fitted with a two-shaft diesel powerplant, capable of propelling the ship at a speed of , although was reached during trials.〔Gardiner and Chumbley 1995, pp. 117–118.〕〔Prézelin and Baker 1990, p. 158.〕 Two ships of the class were fitted with modified powerplants. ''Commandment Bory'' was powered by Free-piston engines driving gas turbines, although it was refitted with a conventional diesel installation in 1974–1975, while ''Balney'' was fitted with an experimental CODAG (Combined diesel and gas) installation, with a and two diesel engines driving a single shaft. The CODAG arrangement took up less space, allowing 100 tons more fuel to be carried and giving a range of at . ''Balny'' omitted one 100 mm gun turret to accommodate the revised machinery.〔〔Prézelin and Baker 1990, p. 157.〕 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「Commandant Rivière-class frigate」の詳細全文を読む スポンサード リンク
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