| 词条 | 12"/50 caliber gun (Argentina) |
| 释义 |
|is_artillery=yes |is_explosive= yes |is_ranged=yes | image=ARA Moreno 305mm gun.jpg | image_size = 300 |caption=a main gun of the battleship ARA Moreno during its construction, sometime between 1910 and 1915. |name= 12"/50 caliber Bethlehem gun |origin= United States |used_by={{sclass-|Rivadavia|battleship}}s |wars=World War I, World War II |prod_date= |type=Naval gun |date= |designer= |design_date=1910 |manufacturer=Bethlehem Steel Corporation[1] |service=1915–1956[1][1] |caliber= {{convert|12|in|mm|sigfig=4}}[1] |part_length={{convert|50|ft|6|in|m|abbr=on|sigfig=4}} bore (50 cal)[1] |carriage= |breech= |rate=2.0–3.0 rounds per minute[1] |velocity= |cartridge= |ammo_wt= |max_range={{convert|24000|yd|m|abbr=on}}[1] |recoil={{convert|38|in|cm}}[1] |weight=66 tons[1] |length= |crew= |number= |filling_weight= }} The 12"/50 caliber Bethlehem gun was a US naval gun designed in 1910 as the main armament for the Argentine Navy’s dreadnought battleships of the {{sclass-|Rivadavia|battleship|4}}. DesignThe 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.[2] 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 CapabilitiesThe 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 an 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. The previous 12" gun, manufactured for the U.S. Navy, was the Mark 7 version, a very similar gun which had been designed and installed in the 1912 era {{sclass-|Wyoming|battleship|2}}s.[2] ServiceThis gun was only installed in the Argentine Navy Rivadavia-class battleships Rivadavia and Moreno. See also
ReferencesCitations1. ^1956 is the year the Argentinian battleships were decommissioned. 2. ^1 2 3 4 5 6 7 8 9 {{cite web|last=DiGiulian |first=Tony |title=Argentina - 12"/50 (30.5 cm) Bethlehem |url=http://www.navweaps.com/Weapons/WNARG_12-50_Bethlehem.htm |publisher=Navweaps.com |accessdate=22 February 2010 |archiveurl=https://web.archive.org/web/20100114192258/http://www.navweaps.com/Weapons/WNARG_12-50_Bethlehem.htm |archivedate=14 January 2010 |deadurl=no |df= }} Sources{{expand section|date=September 2015}}External links
4 : Naval guns of Argentina|Naval guns of the United States|World War II naval weapons|305 mm artillery |
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