BL 9.2-inch Mk XI naval gun

The BL 9.2-inch Mark XI gun was a British 50 calibre high-velocity naval gun which was mounted as primary armament on armoured cruisers and secondary armament on pre-dreadnought battleships.

BL 9.2-inch Mk XI gun
Agamemnon fires her 9.2-inch secondary guns at Ottoman Turkish forts at Sedd el Bahr on 4 March 1915
TypeNaval gun
Place of originUnited Kingdom
Service history
In service1908 – 1920
Used byUnited Kingdom
WarsWorld War I
Production history
DesignerVickers
Designed1902
Specifications
Mass28 tons barrel & breech
Barrel length38 ft 4 in (11.68 m) bore (50 cal)

Shell380 pounds (172.4 kg) Lyddite, Armour-piercing, Shrapnel
Calibre9.2 inches (233.7 mm)
Muzzle velocity2,875 ft/s (876 m/s)
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