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BL 7.5-inch Mk I naval gun

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Naval gun

Ordnance BL 7.5-inch gun Mk I
Starboard wing gun onHMSAntrim
Type	Naval gun
Place of origin	United Kingdom
Service history
In service	1905–1922
Used by	Royal Navy
Wars	World War I
Production history
Designer	Vickers
Designed	circa. 1901
Manufacturer	Vickers
Produced	1905
No. built	33
Specifications
Mass	13.7 long tons (13.9 t)
Barrel length	28 feet (8.534 m) bore (45calibres)

Shell	200 pounds (90.7 kg)
Calibre	7.5 inches (191 mm)
Breech	Welin breech block
Elevation	-5° to +15°
Rate of fire	4-5 rpm
Muzzle velocity	2,700 ft/s (820 m/s)^[1]
Effective firing range	7.9 mi (12.7 km) at 15°^[2]

TheBL 7.5-inch gun Mk I was a British 45-calibre, medium-velocity, naval gun which entered service with theRoyal Navy in 1905.

History

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This gun was only mounted onDevonshire class cruisers commissioned in 1905, and was quickly superseded by the 50-calibre7.5-inch Mk II gun.

Notes

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^2700 ft/sec firing a 200-pound projectile:Brasseys Naval Annual 1902 using 61 lb cordite MD size 26 propellant :Treatise on Ammunition 1915
^Friedman, Norman (1 January 2011).Naval weapons of World War One. Seaforth.ISBN 978-1-84832-100-7.OCLC 786178793.

References

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Friedman, Norman (2011).Naval Weapons of World War One. Barnsley, South Yorkshire, UK: Seaforth.ISBN 978-1-84832-100-7.

External links

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Wikimedia Commons has media related toBL 7.5 inch Mk I naval gun.

Tony DiGiulian,British 7.5"/45 (19 cm) Mark I

v t e British Empire naval weapons of theFirst World War
Monitor guns	BL 9.2-inch Mk VI BL 9.2-inch Mk VIII BL 9.2-inch Mk X BL 9.2-inch Mk XII BL 12-inch Mk VIII BL 14-inch Mk II (US built) BL 15-inch Mk I BL 18-inch Mk I
Capital ship main armament	Vickers 10-inch 45 cal. EOC 10-inch 45 cal. BL 12-inch Mk VIII BL 12-inch Mk IX BL 12-inch Mk X BL 12-inch Mk XI & XII EOC 12-inch 45 cal. Mk XIII BL 13.5-inch Mk I – IV BL 13.5-inch Mk V BL 13.5-inch Mk VI EOC 14-inch 45 cal. Mk I BL 15-inch Mk I
Armoured cruiser main armament	BL 7.5-inch Mk I BL 9.2-inch Mk X BL 9.2-inch Mk XI
Secondary armament and light cruiser main armament	QF 12-pounder 18 cwt QF 14-pounder Maxim-Nordenfelt QF 14-pounder Mk I & II QF 4-inch Mk III BL 4-inch Mk VII QF 4-inch Mk V BL 4-inch Mk IX BL 5.5-inch Mk I QF 6-inch Mk I – III BL 6-inch Mk VII BL 6-inch Mk XI BL 6-inch Mk XII BL 6-inch Mk XIII-XVIII BL 7.5-inch Mk II – Mk V
Destroyer and small cruiser armament	QF 12-pounder 12 cwt Mk II QF 4-inch Mk III BL 4-inch Mk VIII QF 4-inch Mk IV BL 4.7-inch Mk I
Merchant ship armament	QF 4.7-inch Mk I – IV QF 4.7-inch Mk V*
Submarine guns	BL 4-inch Mk XI QF 4-inch Mk XII
Anti-aircraft guns	QF 2-pounder "pom-pom" Mk II QF 3-inch 20 cwt QF 4-inch Mk V
Light weapons	.303 Vickers machine gun QF 3-pounder Hotchkiss QF 3-pounder Vickers QF 6-pounder Hotchkiss
Torpedoes	18-inch Mk V – VIII 21-inch Mk II 21-inch Mk IV
Mines	Spherical Mk I, II and III Vickers Elia mine Type H mine
Anti-submarine weapons	Type A Depth charge Type B Depth charge Type C Depth charge Type D Depth charge Type E Depth charge Type F Depth charge Type G Depth charge Cruiser Mine 7.5-inch howitzer
Landing guns	QF 12-pounder 8 cwt

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