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6 inch 35 caliber naval gun 1877
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6 inch 35 caliber naval gun 1877 : ウィキペディア英語版
6 inch 35 caliber naval gun 1877

6 inch 35 caliber naval gun 1877 was a 152 mm naval gun used by Russian Empire. The gun was used from 1887 as battleship secondary armament and cruiser armament. The gun was mostly replaced by newer 6 inch 45 caliber Canet gun 1892 by Russo-Japanese War, but was still used on some ships. During the First World War fourteen guns were used as a coastal guns on Gulf of Finland in the Peter the Great's Naval Fortress and were taken over by Finland after Finland's Declaration of Independence in 1917. The guns were used by Finland in the Second World War.〔
〕 Russian model year 1877 refers to rifling system, not gun adoption.
==Background==
Russian Empire Staff captain A.F. Brink had developed plans for a new six inch 35 caliber gun that was able to withstand 20% higher barrel pressures than existing guns. In 1882 development began for a new six inch naval gun that resulted in Brink's design being selected. Based on gun barrel material strength theories of lieutenant general N.V. Kalakutskij Obukhov State Plant produced the first 35 caliber gun in 1885. The design was a hoop gun with a total of eight layers besides the inner barrel: five mantle barrels, shroud, connecting and mounting rings. The gun was the first medium caliber gun used by Russia that had Treuille de Beaulieu screw breech block with de Bange obturator.〔〔

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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