Ordnance BL 4-inch Mk IX gun | |
---|---|
Type | Naval gun |
Service history | |
In service | 1917–1945 |
Used by | Royal Navy Royal Canadian Navy Free French Navy |
Wars | World War I World War II |
Production history | |
No. built | 2,382[1] |
Specifications | |
Mass | 2 tons barrel & breech[2] |
Barrel length | 180 inches (4.572 m) bore (45 calibres) |
Shell | 31 pounds (14.1 kg) |
Calibre | 4 inches (101.6 mm) |
Breech | Welin interrupted screw |
Elevation | -10 degrees to +30 degrees[3] |
Rate of fire | 10-12 rpm[3] |
Muzzle velocity | 800 metres per second (2,600 ft/s)[2] |
Maximum firing range | 12,660 metres (13,850 yd)[2] |
The BL 4-inch Mk IX naval gun[note 1] was a British medium-velocity naval gun introduced in 1917 as secondary armament on the Renown-class battlecruisers and Glorious-class "large light cruisers", but which served most notably as the main armament on Flower-class corvettes throughout World War II.
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