BL 7.5-inch Mk I naval gun
The BL 7.5-inch gun Mk I was a British 45-calibre, medium-velocity, naval gun which entered service with the Royal Navy in 1905.
| Ordnance BL 7.5-inch gun Mk I | |
|---|---|
Starboard wing gun on HMS Antrim | |
| Type | Naval gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1905–1922 |
| Used by | Royal Navy |
| Wars | World War I |
| Production history | |
| Designer | Vickers |
| Designed | circa. 1901 |
| Manufacturer | Vickers |
| Produced | 1905 |
| No. built | 33 |
| Specifications | |
| Mass | 13.7 long tons (13.9 t) |
| Barrel length | 28 feet (8.534 m) bore (45 calibres) |
| Shell | 200 pounds (90.7 kg) |
| Calibre | 7.5 inches (191 mm) |
| Breech | Welin breech block |
| Elevation | -5° to +15° |
| Rate of fire | 4-5 rpm |
| Muzzle velocity | 2,700 ft/s (820 m/s) |
| Effective firing range | 7.9 mi (12.7 km) at 15° |
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