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The ''M15'' class comprised fourteen monitors of the Royal Navy, all built and launched during 1915. == Design == The ships of this class were ordered in March, 1915, as part of the Emergency War Programme of ship construction. They were designed to use the 9.2 inch Mk VI gun turrets removed from the and the Mk X turrets held in stock for the and s. This resulted in the first four of the class, which were built by William Gray & Company of Hartlepool, receiving the Mk X mounting. The remaining ten ships, all built by Sir Raylton Dixon & Co., Middlesbrough, all received the Mk VI mounting. During September 1915, the 9.2 inch guns of HMS ''M24'', ''M25'', ''M26'' and ''M27'' were removed for use as artillery. These were replaced by 7.5-inch guns. ''M24'' and ''M25'' received the spare guns reserved for the recently sunk pre-dreadnought battleship , ''M26'' received one of ''Swiftsure''s spare guns. ''M27'' received 6-inch (M27) guns. ''M21'' and ''M23'' also had their 9.2 inch gun removed in 1917, receiving 7.5-inch guns from the decommissioned pre-dreadnought . The class used a mixture of propulsion methods. ''M21'' and '' M22'' were fitted with conventional triple-expansion steam engines, ''M24'' was fitted with four-cylinder paraffin engines, and the remainder received Bolinder four-cylinder semi-diesel engines. 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「M15-class monitor」の詳細全文を読む スポンサード リンク
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