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The 6-inch (152 mm)/40 caliber Mark 4 guns were developed before the Spanish–American War and still used black powder or brown powder, in later years they were not considered strong enough to withstand the higher chamber pressures generated by the newer smokeless powder adopted around 1898.
152.4 mm (6.00 in) BL 6 inch naval guns Mk XIII – XVIII United Kingdom: World War I - World War II 152.4 mm (6.00 in) BL 6 inch Mk XXII naval gun 50-caliber United Kingdom: 1920s - World War II 152.4 mm (6.00 in) BL 6 inch Mk XXIII naval gun 50-caliber United Kingdom: World War II 152.4 mm (6.00 in) QF 6 inch Mk I - III 40-caliber
In World War I Britain urgently needed heavy artillery on the Western Front, and various obsolete 6-inch naval guns were converted to 8-inch howitzers. Sixty-three QF 6-inch Mk II guns were shortened, bored out to 8 in (200 mm) and converted to BL type to produce the BL 8-inch howitzer Mk V. [12] Four entered service in December 1915 and 59 ...
Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...
This was an Elswick Ordnance export design, completely different from and longer (30-calibres, 183.5 inch bore) than the contemporary 26-calibres British naval service 6-inch Mk III, IV and VI guns designed by the Royal Gun Factory, although it fired the same 100-pound projectiles.
The BL 6-inch gun Marks II, III, IV and VI [note 1] were the second and subsequent generations of British 6-inch rifled breechloading naval guns, designed by the Royal Gun Factory in the 1880s following the first 6-inch breechloader, the relatively unsuccessful BL 6-inch 80-pounder gun designed by Elswick Ordnance.
The BL 6-inch gun Mark VII (and the related Mk VIII) [h] was a British naval gun dating from 1899, which was mounted on a heavy travelling carriage in 1915 for British Army service to become one of the main heavy field guns in the First World War, and also served as one of the main coast defence guns throughout the British Empire until the 1950s.
Its 6-inch guns were designated BL 6-inch Mk XIII. Superfluous at the end of the war, Agincourt was decommissioned in 1921 and her 6-inch guns removed and used for coastal defence, and in 1939 the First World War era British gunboats Aphis and Ladybird each had their two 6-inch Mk VII guns replaced with 2 MK XIII guns, in which capacity they ...
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