BL 6-inch gun Mk V

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Template:Morefootnotes Template:Use dmy dates Template:EngvarB Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for unknown parameters". The BL 6 inch gun Mk V [note 1] was an early Elswick Ordnance Company breech-loading naval gun originally designed to use the old gunpowder propellants. They were used for coast defence around the British Empire.

Description and service

File:BL 6 inch Mk V gun diagram.jpg
Gun construction and rifling diagram
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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 gun was of a complex all-steel built-up construction, of a steel A-tube surrounded by multiple steel hoops, breech-piece and jacket.

Several were acquired by the British government for coast defence in the UK and were given the designation 6-inch gun Mark V. The breech fittings and firing mechanism were modified in British service to standardize them with the British service guns, Mark IV and VI. The breech-screw was locked by turning to the left, unlike standard service guns made by the Royal Gun Factory, which all locked to the right. Rifling consisted of 28 grooves of the polygroove "Elswick section" type, increasing from 0 to 1 turn in 30 calibres (i.e. 1 turn in 180 inches) at the muzzle.[1]

File:BL 6 inch Mk V gun Georges Head 1892.jpg
Mk V in the upper casemate battery at Georges Head, Sydney, 1892
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They were also exported for use as coast-defence guns in Hong Kong, New Zealand, Australian colonies and Siam (Thailand), typically as disappearing guns.

Romania purchased 10 L/32 guns and used them during the First World War. The Romanian guns had a greater range (7,800 meters).[2]

QFC conversion

File:QFC 6 inch gun Albany 1943 AWM 029664.jpeg
QFC gun, Albany defences, March 1943
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During the 1890s, when the new "QF" technology of loading propellant charges in brass cases to increase the rate of fire was in favour, 4 guns were returned from New South Wales, Australia to the UK to be converted to QF.

2 of the resulting QFC guns are known to have been still in commission until 1945, in the Princess Royal Fortress defending the port of Albany, Western Australia.[3]

Image gallery

See also

Surviving examples

Notes

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  1. ↑ Mk V = Mark 5. Britain used Roman numerals to designate Marks (models) of ordnance until after World War II. Hence this was the fifth model of BL 6-inch gun in British service.

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References

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  1. ↑ "Treatise on Construction of Service Ordnance, 1893", pages 263-264
  2. ↑ Sanders Marble, BRILL, 2016, King of Battle: Artillery in World War I, p. 358
  3. ↑ Peter Dunn, "two emplaced at the fortress from 1938 to 1945. It was originally from South Head - Sydney and was one of the four BL guns from the Colony of NSW which was sent to England in the late part of the 19th Century to be converted to QF"
  4. ↑ Script error: No such module "citation/CS1".

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Bibliography

External links

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