BL 15-inch Mk I naval gun
The BL 15-inch Mark I succeeded the BL 13.5-inch Mk V naval gun. It was the first British 15-inch (380 mm) gun design and the most widely used and longest lasting of any British designs, and arguably the most successful heavy gun ever developed by the Royal Navy. It was deployed on capital ships from 1915 until 1959 and was a key Royal Navy gun in both World Wars.
| BL 15-inch Mark I naval gun | |
|---|---|
As mounted on monitor HMS Terror, 1915 | |
| Type | Naval gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1915–1959 |
| Used by | United Kingdom |
| Wars | World War I, World War II, Cold War |
| Production history | |
| Designed | 1912 |
| Produced | 1912–1918 |
| No. built | 186 |
| Specifications | |
| Mass | 100 long tons (100 t) |
| Length | 650.4 inches (16.52 m) |
| Barrel length | 630 inches (16 m) L42 |
| Shell | separate charges and shell |
| Shell weight | 1,938 pounds (879 kg) |
| Calibre | 15-inch (381.0 mm) |
| Recoil | 46 inches (1.2 m) |
| Rate of fire | 2 rounds per minute |
| Muzzle velocity | 2,450–2,640 feet per second (750–800 m/s), with supercharge |
| Maximum firing range | 33,550 yards (30,680 m) (Mk XVIIB or Mk XXII streamlined shell @ 30°) HMS Vanguard – 37,870 yards (34,630 m) @ 30°, with supercharges. |
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