The BL 15-inch Mark I succeeded the BL 13.5-inch Mk V naval gun. It was the first British 15-inch (380 mm) gun design and the most widely used and longest lasting of any British designs, and arguably the most successful heavy gun ever developed by the Royal Navy. It was deployed on capital ships from 1915 until 1959 and was a key Royal Navy gun in both World Wars.
The BL 16-inch Mark I was a British naval gun introduced in the 1920s and used on the two Nelson-class battleships. A breech-loading gun, the barrel was 45 calibres long meaning 45 times the 16-inch (406 mm) bore – 60 ft (18 m) long.
The QF 4.7-inch Gun Mks I, II, III, and IV were a family of British quick-firing 4.724-inch (120 mm) naval and coast defence guns of the late 1880s and 1890s that served with the navies of various countries. They were also mounted on various wheeled carriages to provide the British Army with a long range gun. They all had a barrel of 40 calibres length.
The QF 6-inch 40 calibre naval gun (Quick-Firing) was used by many United Kingdom-built warships around the end of the 19th century and the start of the 20th century. In British service it was known as the QF 6-inch Mk I, II, III guns. As the 15 cm/40 (6") 41st Year Type naval gun it was used for pre-dreadnought battleships, armoured cruisers and protected cruisers of the early Imperial Japanese Navy built in UK and European shipyards. It was also the heaviest gun ever carried by a pre-Cold War destroyer.
The QF 12-pounder 12-cwt gun (Quick-Firing) was a common, versatile 3-inch (76.2 mm) calibre naval gun introduced in 1894 and used until the middle of the 20th century. It was produced by Armstrong Whitworth, Elswick and used on Royal Navy warships, exported to allied countries, and used for land service. In British service "12-pounder" was the rounded value of the projectile weight, and "12 cwt (hundredweight)" was the weight of the barrel and breech, to differentiate it from other "12-pounder" guns.
The Ordnance QF Hotchkiss 6 pounder gun Mk I and Mk II or QF 6 pounder 8 cwt were a family of long-lived light 57 mm naval guns introduced in 1885 to defend against new, small and fast vessels such as torpedo boats and later submarines. There were many variants produced, often under license which ranged in length from 40 to 58 calibers, but 40 caliber was the most common version.
The Armstrong Whitworth 12-inch naval gun of 40 calibres length was designed by and manufactured mainly by Armstrong's ordnance branch, Elswick Ordnance Company. It was intended for the Royal Navy's Royal Sovereign-class battleships, but budgetary constraints delayed their introduction. The first units were instead supplied to Japan. As the Type 41 12-inch (305 mm) 40-calibre naval gun it was the standard main battery on several early United Kingdom-built pre-dreadnought battleships of the Imperial Japanese Navy.
The Vickers 10 inch naval gun was used on battleships and armoured cruisers built during the first decade of the 20th century. They were used as the Type 41 10-inch /45-caliber aboard the British-built semi-dreadnought Katori-class battleships and the natively-built Satsuma-class battleships of the Imperial Japanese Navy.
A 4.7 inch Gun is any of a number of British-built 120 mm naval artillery guns. Several of these guns were designed and manufactured by the Elswick Ordnance Company, part of Armstrong Whitworth. They were a major export item and hence were actually of 120 mm calibre (4.724 inches) to meet the requirements of metricised navies, 4.7 inch is an approximation used for the British designation. 4.7 inch guns include:
The BL 12 inch Gun Mark X was a British 45-calibre naval gun which was mounted as primary armament on battleships and battlecruisers from 1906. It first appeared on HMS Dreadnought.
The BL 7.5-inch Mk II–Mk V guns 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 EOC 12 inch 45 calibre gun were various similar 12-inch wire-wound naval guns designed and manufactured by Elswick Ordnance Company to equip ships that the parent company Armstrong Whitworth built and/or armed for several countries before World War I.
The EOC 10-inch 45 calibre gun were various similar 10-inch naval guns designed and manufactured by Elswick Ordnance Company to equip ships they built and/or armed for several countries before World War I.
The Vickers 14-inch 45-calibre gun was designed and built by Vickers and initially installed on the battlecruiser Kongō which it was building for the Imperial Japanese Navy. Guns similar to this Vickers design were also later built in Japan to arm Kongō's sister ships and subsequent Japanese-constructed "super-dreadnoughts" which were all built in Japan. Japanese-built versions of the guns were designated 14-inch 41st Year Type, and from 1917 when the Navy went metric they were redesignated 36 cm 41st Year Type.
Almirante Latorre, named after Juan José Latorre, was a super-dreadnought battleship built for the Chilean Navy. It was the first of a planned two-ship class that would respond to earlier warship purchases by other South American countries. Construction began at Elswick, Newcastle upon Tyne soon after the ship was ordered in November 1911, and was approaching completion when it was bought by the United Kingdom's Royal Navy for use in the First World War. Commissioned in September 1915, it served in the Grand Fleet as HMS Canada for the duration of the war and saw action during the Battle of Jutland.
The Almirante Latorre class consisted of two super-dreadnought battleships designed by the British company Armstrong Whitworth for the Chilean Navy. They were intended to be Chile's entries to the South American dreadnought race, but both were purchased by the Royal Navy prior to completion for use in the First World War. Only one, Almirante Latorre (HMS Canada), was finished as a battleship; Almirante Cochrane (HMS Eagle), was converted to an aircraft carrier. Under their Chilean names, they honored Admirals (Almirantes) Juan José Latorre and Thomas Cochrane; they took their British names from what was then a dominion of Canada and a traditional ship name in the Royal Navy.
By taking on ships being built for foreign navies in British shipyards, a number of British-built 6-inch 50-calibre naval guns found their way into British service in World War I. Their specifications and performance differed from standard Royal Navy 6-inch guns but in British service they fired standard service 100-pound projectiles.
Riachuelo was a battleship project for the Brazilian Navy developed between 1913 and 1914. It was designed to be the most powerful warship of its time; it was a Brazilian response to the Chilean projects Almirante Latorre and Almirante Cochrane and to the Argentine projects Rivadavia and Moreno, during the naval arms race in South America. The construction would be carried out by the British construction company Armstrong Whitworth and Vickers, under the codename Project 781, a project chosen among several other plans offered to the Brazilian authorities. The battleship would be 188.98 meters long and have at least eight 381-millimeter guns, displacing up to 30,500 nautical tons.
The 15 cm/45 41st Year Type was a British naval gun designed by the Elswick Ordnance Company for export in the years before World War I that armed warships of the Imperial Japanese Navy. These guns served aboard Japanese ships during World War I and as coastal artillery during World War II.
The BL 13.5-inch Mk VI gun was a British heavy naval gun, originally ordered by the Ottoman Navy to equip its Reşadiye-class dreadnoughts around 1911. The one ship completed was seized by the British Government when World War I began in August 1914 and became HMS Erin. Only 10 guns were built, to a design similar to that of their 45-calibre BL 13.5-inch Mk V naval gun. The smaller chamber in the Mk VI gun meant that less propellant could be used which reduced muzzle velocity by 55 ft/s (17 m/s) and range by 630 yards (580 m). Designed by Vickers, they manufactured the guns of X and Y turrets, while Elswick Ordnance Company manufactured the guns of A, B, and Q turrets.
