12"/50 caliber gun (Argentina)
|12"/50 caliber Bethlehem gun|
a main gun of the battleship ARA Moreno during its construction, sometime between 1910 and 1915.
|Place of origin||United States|
|Used by||Rivadavia-class battleships|
|Wars||World War I, World War II|
|Manufacturer||Bethlehem Steel Corporation|
|Barrel length||50 ft 6 in (15.39 m) bore (50 cal)|
|Caliber||12 inches (304.8 mm)|
|Recoil||38 inches (97 cm)|
|Rate of fire||2.0–3.0 rounds per minute|
|Maximum firing range||24,000 yd (22,000 m)|
The gun was designed in 1910, and it was probably based on the US 12"/50 (30.5 cm) Mark 7 naval gun with a breech weight added. The guns were manufactured at the Bethlehem Steel Corporation. The ships in the class had twelve 305 mm guns each, mounted in six twin (2-gun) turrets, with two turrets forward, two aft, and one on each side.
Measurements and Capabilities
The gun weighed 66 tons including the breech and was capable of an average rate of fire of 2–3 rounds a minute. It could throw a 870 lb. (394.6 kg) Mark 15 armor piercing shell 24,000 yards (21,950 meters) at an elevation of 14.7°, while the "barrel life" of the guns was 200 shots.
- BL 12 inch Mk XI – XII naval gun British equivalent
- Obukhovskii 12"/52 Pattern 1907 gun Russian equivalent
- 30.5 cm SK L/50 gun German equivalent
- List of naval guns
- 1956 is the year the Argentinian battleships were decommissioned.
- History and specifications, at Naval Weapons of the World website (NavWeaps.com) (retrieved 2010-02-22)
- "Haze Gray & Underway" - World Battleship Lists - Argentina (retrieved 2010-02-22)
- (Spanish) "Historia y Arqueología Marítima" (HistArMar) - Battleships ARA Moreno & Rivadavia - History & Pictures (retrieved 2010-02-22)