Ordnance QF 12-pounder 18 cwt | |
---|---|
![]() Deployed as anti-aircraft gun on HMS Agamemnon off Salonika, 1916 | |
Type | Naval gun, Coastal defence |
Place of origin | United Kingdom |
Service history | |
In service | 1906–1921? |
Used by | Royal Navy |
Wars | World War I |
Production history | |
Designer | Elswick Ordnance Company |
Designed | 189? |
Specifications | |
Mass | Gun & breech: 2,016 lb (914 kg) |
Barrel length | Bore: 150-inch (3.81 m) (50 calibres) |
Shell | Separate QF 12.5 lb (5.66 kg) |
Calibre | 3 in (76 mm) |
Rate of fire | 20 rd/min[1] |
Muzzle velocity | 2,600 ft/s (790 m/s)[2] |
Effective firing range | 9,300 yards @ +20° (8,500 m @ +20°) |
The QF 12 pounder 18 cwt gun (Quick-Firing) was a 3-inch high-velocity naval gun used to equip larger British warships such as battleships for defence against torpedo boats. 18 cwt referred to the weight of gun and breech (18 × 112 lb = 2,016 lb or 914 kg), to differentiate the gun from others that also fired the "12 pound" (actually 12.5 lb or 5.7 kg) shell.
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