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Calibre. 7.5 inches (191 mm) Muzzle velocity. 2,765 to 2,840 feet per second (843 to 866 m/s) [1] Maximum firing range. 14,200 yards (13,000 m) [2] The BL 7.5-inch Mk II–Mk V guns [note 1] were a variety of 50- calibre naval guns used by Britain in World War I. They all had similar performance and fired the same shells.
The BL 7.5-inch gun Mk I was a British 45-calibre, medium-velocity, naval gun which entered service with the Royal Navy in 1905. History [ edit ] This gun was only mounted on Devonshire class cruisers commissioned in 1905, and was quickly superseded by the 50-calibre 7.5-inch Mk II gun .
L: 23,820 yards (21,780 m) at 20°. H: 40,600 yards (37,120 m) at 40° (World War II railway gun, with Super Charge) The BL 13.5 inch Mk V gun [note 2] was a British heavy naval gun, introduced in 1912 as the main armament for the new super-dreadnought battleships of the Orion class. The calibre was 13.5 inches (343 mm) and the barrels were 45 ...
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11.65 mi (18.75 km) Sights. calibrating and reciprocating [2] The BL 4.5 inch medium gun was a British gun used by field artillery in the Second World War for counter-battery fire. Developed as a replacement for the BL 60-pounder gun it used the same carriage as the BL 5.5-inch medium gun but fired a lighter round further.
The QF 4.7-inch Mk XI gun, on the Mk XX twin mounting, was introduced to the RN aboard the L and M class destroyers, in commission from 1941 onwards. It featured a 62 lb (28.1 kg) shell fired at 2,538 ft/second (774 m/s) to a maximum range of 21,240 yards (19,420 m) at 45 degrees of elevation. [1] The Mk XX mounting was fully enclosed, but the ...
Naval history. 5.5-inch Mk I at National War Memorial Southern Command. This weapon was developed by Coventry Ordnance Works in 1913 and offered to the Greek Navy as the main armament for two new cruisers building at Cammell Laird. On the outbreak Of World War I the two ships were purchased by Britain as HMS Chester and HMS Birkenhead.
6,500 yards (5,900 m) (40 lb shell) Filling weight. 9 pounds 15 ounces (4.51 kg) ( Lyddite) 5 pounds (2.27 kg) ( Amatol) The Ordnance BL 5-inch howitzer was initially introduced to provide the Royal Field Artillery with continuing explosive shell capability following the decision to concentrate on shrapnel for field guns in the 1890s.