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320 mm Model 1934 naval gun
Naval gun / From Wikipedia, the free encyclopedia
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The 320 mm naval gun was the main battery gun used to modernize Italy's World War I battleships for service during World War II.[1] The guns were manufactured by boring out and relining the battleships' original 12"/46 (30 cm) built-up guns and modifying the turrets to increase elevation above the original 20° maximum. Each ship carried two 548-tonne twin turrets and two 745-tonne triple turrets. All guns used pneumatically operated side-swing Welin breech blocks. Each barrel could fire two rounds per minute.[2]
Cannone navale da 320 | |
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![]() This photo shows the typical fore-and-aft installation of a twin turret superfiring over a triple turret. | |
Type | Naval gun |
Place of origin | Italy |
Service history | |
In service | 1937 – 1956[1] |
Used by |
|
Wars | Second World War |
Specifications | |
Mass | 64 tonnes[2] |
Barrel length | 14 meters (550 inches)[2] |
Shell | 525 kilograms (1,160 lb)[2] |
Caliber | 320 mm (12.6 in)[2] |
Muzzle velocity | 830 meters per second (2,700 ft/sec)[2] |
Maximum firing range | 30 kilometres (19 mi)[2] |
In service these guns chronically suffered of great horizontal dispersion, both from the worsened thermodynamic performance of the guns themselves and from the unequal quality of the shells fired.[3]