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RML 16 inch 80 ton gun : ウィキペディア英語版 | RML 16 inch 80 ton gun
The RML 16 inch 80 ton guns were large rifled muzzle-loading guns intended to give the largest British battleships parity with the large guns being mounted by Italian and French ships in the Mediterranean Sea in the 1870s. ==Design and history==
The gun was constructed of a toughened mild steel inner "A" tube surrounded by multiple wrought-iron coils, breech-piece and jacket. Rifling was of the "polygroove plain section" type, with 33 grooves increasing from 0 to 1 turn in 50 calibres (i.e. 1 turn in 800 inches) at the muzzle.〔 After a long design and experimentation period beginning in 1873, with 4 guns became the only ship to mount them, in 1880. By that time such muzzle-loading guns were already obsolescent and were being superseded by a new generation of rifled breechloading guns. 2 more guns were mounted for coast defence in the Admiralty Pier Turret at Dover.
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「RML 16 inch 80 ton gun」の詳細全文を読む
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