QF 4 inch naval gun Mk IV, XII, XXII
From Self-sufficiency
| Ordnance QF 4 inch gun Mk IV, XII, XXII | |
|---|---|
| 300px Mk IV gun from HMS Lance at the Imperial War Museum, London | |
| Type | Light Naval gun Submarine gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1911-1940s |
| Used by |  United Kingdom
|
| Wars | World War I World War II |
| Specifications | |
| Weight | 2,750 pounds (1,250 kg) barrel & breech |
| Barrel length | 160 inches (4.064 m) bore (40 calibres) |
| | |
| Shell | Mk IV : Separate QF 31 pounds (14.06 kg); Mk XII & XXII : Fixed QF 31 pounds (14.06 kg), 35 pounds (15.88 kg) from 1944[1] |
| Calibre | 4-inch (101.6 mm) |
| Breech | horizontal sliding block |
| Muzzle velocity | Mk IV : 2,370 feet per second (720 m/s)[2] Mk XII & XXII : 1,873 feet per second (571 m/s) |
| Maximum range | 10,000 yards (9,100 m) |
The QF 4-inch gun Mk IV was introduced in 1911 as a faster-loading light gun successor to the BL 4 inch Mk VIII gun.
Contents
Mk IV gun
File:QF 4 inch Mk IV gun HMS Satyr WWI IWM SP 1497.jpg On R class destroyer HMS Satyr circa. 1917 - 1918
Mk IV armed many British destroyers and some cruisers in World War I. It was used to arm merchant ships in World War II.
The guns armed the following warships :
- Forward class scout cruisers as re-gunned in 1911
- Sentinel class scout cruisers as re-gunned 1911-1912
- Pathfinder class scout cruisers as re-gunned 1911-1912
- Adventure class scout cruisers as re-gunned 1911-1912
- Acasta (K) class destroyers of 1911
- Laforey (L) class destroyers of 1913
- Yarrow M class destroyers laid down 1912 - 1915
- Admiralty M class destroyer of 1913
- Thornycroft M class destroyers laid down 1913 - 1915
- Hawthorn M class destroyer of 1914
- Talisman class destroyers of 1914
- Medea class destroyers of 1914
- Faulknor class leaders of 1914
- Marksman class destroyers of 1914
- Anzac class destroyers of 1915
- Yarrow Later M class destroyers of 1915
- R class destroyers of 1916
- S class destroyers of 1917
- Fundy class minesweepers of 1938 (guns from decommissioned Canadian S class destroyers)
Mk XII and XXII submarine gun
File:QF 4 inch Mk XII gun on T class submarine AWM 306479.jpeg Mk XII gun on unidentified T class submarine circa. WWII
The Mk XII variant was developed for arming submarines from 1918, Mk XXII was developed to arm submarines during World War II. These submarine guns fired a heavier 35-pound projectile from late 1944[1]. Mk XII and XXII equipped :
- L class
- Odin ("O") class
- Parthian ("P") class
- River (or Thames) class
- Grampus (or Porpoise) class
- Triton ("T") class
- S class
- Some of the Amphion ("A" or Acheron) class
Surviving guns
- The Mk IV gun from HMS Lance which fired the first British shot of World War I on 5 August 1914 is on display at the Imperial War Museum, London.
See also
- 12px Media related to QF 4 inch Mk IV naval gun at Wikimedia Commons
- List of naval guns
Notes
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- Tony DiGiulian, British 4"/40 (10.2 cm) QF Marks IV, XII and XXII
External links
Template:GreatWarBritishNavalWeapons
Template:WWIIBritishCommNavalWeapons
