View source for 130 mm/55 B7 Pattern 1913

{{Infobox weapon
| name               = 130mm/55 Pattern 1913 naval gun B7
| image              = Stamsund - Canon.jpg
| image_size = 300
| caption            =
| origin             = Russian
| type               = [[Naval gun]]
<!-- Type selection -->
| is_ranged          = yes
| is_bladed          =
| is_explosive       =
| is_artillery       = yes
| is_vehicle         =
| is_missile         =
| is_UK              =
<!-- Service history -->
| service            = 1914–1945?
| used_by            = Russia; [[Soviet Union]]
| wars               = [[World War I]], [[World War II]]
<!-- Production history -->
| designer           =
| design_date        = 1912
| manufacturer       =[[Obukhov State Plant]], [[Vickers Limited|Vickers Ltd.]]
| unit_cost          =
| production_date    = 1913 - 1925
| number             = 571
| variants           =
<!-- General specifications -->
| spec_label         = Pattern 1913
| weight             = {{convert|5290|kg|lb|abbr=on}} (gun only)
| length             = {{convert|7150|mm|in|abbr=on|sigfig=3}}
| part_length        = {{convert|7019|mm|ftin|abbr=on}} (bore)<br>{{convert|5862|mm|ftin|abbr=on|sigfig=1}} (rifling)
| width              =
| height             =
| diameter           =
| crew               =
<!-- Ranged weapon specifications -->
| cartridge          = HE mod 1911
| cartridge_weight   = {{convert|36.86|kg|lb|sigfig=3}}
| caliber            = {{convert|130|mm|in|abbr=on|sigfig=3}}
| barrels            =
| action             =
| rate               = 5-8 shots/minute
| velocity           = {{convert|861|m/s|ft/s|abbr=on}}
| range              =
| max_range          = {{convert|20300|m|yd|0|abbr=on}}
| feed               =
| sights             =
<!-- Artillery specifications -->
| breech             = [[Welin breech block]]
| recoil             = [[Hydro-spring]]
| carriage           =
| elevation          = -5° / + 30°
| traverse           = 360°
}}
The '''130mm/55 B7 Pattern 1913 naval gun ''' was a 5.1-inch naval gun used predominantly on ships of the [[Imperial Russian Navy]] and later by the [[Soviet Navy]]. It was manufactured mainly by the [[Obukhov State Plant]] (OSP) in [[St. Petersburg]], as well as under licence by [[Vickers Limited]] in Great Britain. The gun was used as medium artillery on several Russian [[dreadnoughts]] and as main artillery on cruisers, as well as coastal artillery. It was succeeded by the [[130 mm/50 B13 Pattern 1936]] naval gun, which became the standard destroyer gun of the Soviet Navy during [[World War II]].
==History==
In 1911 OSP received an order to design a semi-automatic 130&nbsp;mm/60 caliber naval gun for the Main Shipping Administration. The order asked for two prototypes, one for cartridges, one for rounds. On 12 July 1912 the cartridge-version with a 55 caliber barrel was approved. In September 1912 it was decided to go with the hydro-spring rather than the hydro-pneumatic recoil system. Earlier an OSP designed semi-automatic breech mechanism was rejected in favor of a [[Welin breech block|Vickers design]].
In 1913 an initial order of 471 guns was placed with OSP. By 1 January 1917 143 guns had been delivered, with 96 due until the end of that year. The remaining 282 guns were supposed to be delivered in 1918. The first charge of guns was used to equipped the cruiser [[Russian cruiser Svetlana (1915)|''Svetlana'']] and the [[Imperatritsa Mariya-class battleship|''Imperatritsa Mariya''-class]] battleships of the [[Black Sea Fleet]].
Another order of 100 guns was placed in 1913 with Vickers Ltd., of which 24 were ready for delivery by 16 September 1914. Of these 7 were shipped to [[Arkhangelsk]] in October 1914. A further 12 guns destined  for Russian cruiser [[Russian cruiser Varyag (1899)|''Varyag'']] were delivered to Russia on the same route as the repairs of ''Varyag'' were delayed, where they were put to the defense of [[Saaremaa]] island.
The Soviet Navy retained the 130mm/55 Pattern 1913 naval gun and produced additional guns under the designation B-7, as the OSP had been renamed Works No. 232 "Bolshevik" in 1922.
In 1923, 12 guns had been placed in four coastal batteries, one in [[Odessa]] and three along the Caucasian coast.
In 1930 a minor modernizations were made to a few guns at the "Bolshevik" works, improving the loading mechanism and enhancing elevation to +40°.
==References==
* {{cite web |url= http://flot.sevastopol.info/arms/guns/130_55.htm|title= 130mm/55 Pattern 1913 naval gun|author= |date= |publisher= |language= Ru|accessdate=21 March 2010}}
* {{cite web |url= http://wunderwaffe.narod.ru/Magazine/MK/2001_01/05.htm|title= Artillery|author= |date= |publisher= |language= Ru|accessdate=21 March 2010}}
* {{cite web |url=
http://www.navweaps.com/Weapons/WNRussian_51-55_m1913.htm|title= Russian 130 mm/55 (5.1") Pattern 1913|author= Tony DiGiulian |date= 10 May 2006 |publisher= |accessdate=23 March 2010}}
{{Use dmy dates|date=June 2017}}
{{DEFAULTSORT:130 mm 55 B7 Pattern 1913}}
[[Category:Coastal artillery]]
[[Category:130 mm artillery]]
[[Category:Artillery of the Soviet Union]]
[[Category:Artillery of the Russian Empire]]
[[Category:Obukhov State Plant products]]