QF 4.7-inch Mk IX & XII naval gun
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The 4.7 inch QF Mark IX and Mark XII were 45-calibre, 4.7-inch (120 mm) naval guns which armed the majority of Royal Navy and Commonwealth destroyers in World War II,[1] and were exported to many countries after World War II as the destroyers they were mounted on were sold off.
Quick Facts Type, Place of origin ...
QF 4.7 inch Mark IX & Mark XII | |
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Type | Naval gun |
Place of origin | United Kingdom |
Service history | |
In service | 1928–1970? |
Used by | Royal Navy Royal Canadian Navy Royal Australian Navy Royal Hellenic Navy Royal Netherlands Navy Polish Navy Royal Norwegian Navy Turkish Navy Dominican Navy Argentine Navy Brazilian Navy |
Wars | World War II Korean War |
Production history | |
No. built | 742 (Mk IX); 372 (Mk XII) |
Specifications | |
Mass | 2.963–2.984 long tons (3,011–3,032 kg) (Mk IX) 3.238–3.245 long tons (3,290–3,297 kg) (Mk XII) |
Length | 220.62 in (5.60 m) (Mk IX) 224.08 in (5.69 m) (Mk XII) |
Barrel length | Bore: 212.58 in (5.40 m) L/45 (cal) |
Shell | Separate loading cased charge |
Shell weight | 50 pounds (22.7 kg) SAP or HE |
Calibre | 4.724 inches (120 mm) |
Breech | Semi-automatic horizontal sliding-block |
Recoil | Hydro-pneumatic |
Elevation | Varied by mounting |
Rate of fire | about 15 rounds per minute |
Muzzle velocity | 2,650 ft/s (810 m/s) |
Maximum firing range | 16,970 yards (15,520 m) at 40° |
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