QF 4 inch naval gun Mk I – III

Ordnance QF 4-inch gun Mk I, II, III
Australian troops with gun on a transport ship, circa. November 1914
Type	Naval gun Coast defence gun
Place of origin	United Kingdom
Service history
In service	1896 - 1920^{[note 1]}
Used by	British Empire
Wars	Boxer Rebellion, World War I
Production history
Designed	1895
Specifications
Weight	2,912 pounds (1,321 kg) barrel & breech
Barrel length	160 inches (4.064 m) bore (40 cal); 165.35 inches (4.200 m) total

Shell	Separate-loading QF 25 pounds (11.34 kg) Common pointed or Lyddite
Calibre	4-inch (101.6 mm)
Breech	Single-motion screw
Muzzle velocity	2,300 feet per second (700 m/s)^[1]
Maximum firing range	9,000 yards (8,200 m)^[2]

The QF 4-inch gun Mks I, II, III^{[note 2]} were early British QF (quick-firing) naval guns originating in 1895. They all had barrels of 40 calibres length.

Naval service

The gun was intended to be a more powerful alternative to the quick-firing 3-inch QF 12-pounder gun, and a faster-firing replacement for the BL 4-inch gun.

It was mounted on the following ships :

Pelorus-class third-class protected cruisers of 1896
Condor-class sloops of 1898
Cadmus-class sloops of 1900
Topaze-class third-class cruisers, launched in 1903
Invincible-class battlecruisers of 1906

Its 25-pound (11 kg) shell proved insufficiently powerful to make it much of an improvement on the 12-pounder. From 1907 onwards it was succeeded in its class on new warships by the BL 4 inch gun Mk VIII, which fired a 31-pound (14 kg) shell.

Coast Defence gun

From 1906 a number of Mk III guns were transferred from the Royal Navy for use as coast defence guns around the United Kingdom, and remained until 1939.^[3]

In 1918 three guns were in service at Dover Garrison and eight at Forth Garrison.^[4]

World War I land service

On 20 September 1914 the British cruiser HMS Pegasus was sunk by SMS Königsberg in Zanzibar harbour. Her 8 QF 4-inch Mk III guns were recovered and used ashore in the East African campaign. Some were used as coast defence guns at Zanzibar and Mombasa. Two guns, and from 11 February 1916, three guns, were used by 10th Heavy Battery manned by the Royal Marines, mounted on improvised field carriages and towed by Packard lorries, supported by six REO lorries carrying ammunition.^[5]

Surviving guns

A gun from HMS Pegasus used in the WWI land campaign stands outside Fort Jesus on Mombasa Island, Kenya, next to one of the 10.5-cm guns from SMS Königsberg.^[6]
A gun from HMAS Protector is on display outside the Elizabeth and Salisbury Navy Club in Elizabeth, South Australia.
A gun installed in 1918 on the island of Hirta in the St Kilda archipelago, northwest Scotland

Notes

↑ Remaining ships were all scrapped or decommissioned following WWI, by 1921 at latest
↑ I.e. Mark 1, 2 and 3. Britain used Roman numerals to denote Marks (models) of ordnance until after World War 2. Hence this article describes the first three models of British QF 4-inch guns.

References

↑ 2300 ft/s with 25 lb (11 kg) projectile in 1902, using 3 lb 9 oz (1.6 kg) cordite Mk I size 15 propellant (Text Book of Gunnery 1902)
↑ Text Book of Gunnery 1902, Table XII page 337
↑ Hogg & Thurston 1972, page 96
↑ Farndale 1988, pages 398 - 404
↑ Farndale 1988, page 316
↑ Kevin Patience, Konigsberg: A German East African Raider

Bibliography

Text Book of Gunnery, 1902. LONDON : PRINTED FOR HIS MAJESTY'S STATIONERY OFFICE, BY HARRISON AND SONS, ST. MARTIN'S LANE
General Sir Martin Farndale, History of the Royal Regiment of Artillery : Forgotten Fronts and the Home Base 1914-18. London:The Royal Artillery Institution, 1988
Hogg, I.V. and Thurston, L.F. (1972). British Artillery Weapons & Ammunition 1914-1918. Ian Allan, London. ISBN 0-7110-0381-5.

External links

Wikimedia Commons has media related to QF 4 inch naval gun Mk I - III.

Drill for 4 -inch Q.F. gun (land service). 1914 at State Library of Victoria
Gun drill for 4 inch Q.F. mark III gun (land service) 1924 at State Library of Victoria
Tony DiGiulian, British 4"/40 (10.2 cm) QF Marks I, II and III
Diagram of gun on garrison carriage at Victorian Forts and Artillery page

British Empire naval weapons of the Victorian era

Smoothbore muzzle-loading cannons	18-pounder 24-pounder 32-pounder 58 cwt 68-pounder Somerset cannon

Smoothbore muzzle-loading shell guns	8 inch 10-inch 86 cwt

Mortars	10-inch Blomefield 13-inch Blomefield

Howitzers	12-pounder Millar 24-pounder Millar

Rifled breechloaders (Armstrong)	RBL 9 pounder RBL 20 pounder RBL 40 pounder RBL 7 inch 110 pounder

Rifled muzzle-loaders (Lancaster)	68-Pounder Lancaster gun

Rifled muzzle-loaders (converted)	RML 64 pounder 71 cwt

Rifled muzzle-loaders (Woolwich)	RML 9 pounder 8 cwt RML 64 pounder 64 cwt RML 7 inch RML 8 inch RML 9 inch RML 10 inch RML 11 inch RML 12 inch 25 ton RML 12 inch 35 ton RML 12.5 inch RML 16 inch

Quick-firing guns	QF 3-pounder Hotchkiss QF 6-pounder Hotchkiss QF 6 pounder Nordenfelt QF 12-pounder 12 cwt Mk I QF 4 inch QF 4.7 inch QF 6 inch

Breech-loaders (new pattern)	BL 4 inch BL 5 inch BL 6 inch 80 pounder BL 6 inch Mk II – VI BL 8 inch BL 9.2 inch Mk I – VII BL 9.2 inch Mk VIII BL 10 inch BL 12 inch Mk I – VII BL 12 inch Mk VIII BL 13.5 inch BL 16.25 inch

Light weapons	Gatling gun Gardner gun Nordenfelt gun 1-inch Nordenfelt gun

Torpedoes	Whitehead torpedo

British Empire naval weapons of the First 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 US 14 inch 45 cal 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 V 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 pdr 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 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 pdr 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

British Empire small arms and ordnance of the First World War

No. 1
No. 2 Hales Pattern
Nos. 3, 20, 24, 35 Hales rifle grenades
Nos. 5, 23, 36 Mills
No. 6
Nos. 8, 9 Jam Tin
No. 13 Battye
No. 14 Pitcher
No. 15 Ball
No. 16 Oval
No. 17 Opera hat
No. 18
No. 19
No. 21 "Spherical"
No. 22 Newton-Pippin
No. 25 Sangster
No. 27
No. 28 Chemical
No. 29 Gas
No. 31 Day Signal
No. 32 Night Signal
No. 32 "Spherical E"
No. 34 Egg
No. 37
No. 39 Steuart Pattern

Artillery

Tank guns	QF 6 pounder Hotchkiss QF 6 pounder 6 cwt

Infantry guns	1.59-inch Breech-Loading Vickers Q.F. Gun, Mk II ("Vickers-Crayford rocket gun")

Field Artillery	BL 12 pounder 6 cwt QF 12 pounder 8 cwt QF 12 pounder 18 cwt QF 13 pounder BL 15 pounder BLC 15 pounder QF 15 pounder QF 18 pounder QF 4 inch gun Mk III BL 4 inch gun Mk VII QF 4.5 inch Howitzer

Mountain artillery	RML 2.5 inch Mountain Gun BL 10 pounder Mountain Gun BL 2.75-inch Mountain Gun QF 2.95 inch Mountain Gun QF 3.7-inch mountain howitzer

Howitzers, medium, and heavy artillery	QF 4.7 inch Gun BL 5 inch Howitzer BL 5.4 inch Howitzer BL 60 pounder gun BLC 6 inch siege gun BL 6 inch Gun Mk VII BL 6 inch Gun Mk XIX BL 6-inch 26 cwt howitzer BL 6-inch 30 cwt howitzer BL 8 inch Howitzer Mk I - V BL 8 inch Howitzer Mk VI - VIII

Siege artillery	BL 7.5 inch Mk III naval gun BL 9.2-inch howitzer BL 9.2 inch Mk X naval gun BL 12 inch Howitzer BL 12 inch Mk X naval gun BL 15 inch Howitzer

Coastal artillery	QF 12 pounder 12 cwt QF 4 inch naval gun Mk I – III BL 6 inch Mk VII naval gun BL 9.2 inch gun Mk IX–X RML 9 inch

Mortars

Grenade launchers

Smoke and chemical weapons

Railway guns

Anti-aircraft guns

Foreign weapon designs
in British Empire Armies use

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