BL 9.2-inch Mk I – VII naval gun
The BL 9.2-inch Mk I–VII guns were a family of early British heavy breechloading naval and coast defence guns in service from 1881 to the end of World War I. They were originally designed to use the old gunpowder propellants.
| Ordnance BL 9.2-inch Mk I–VII gun | |
|---|---|
Mk VI gun on disappearing mounting at Ben Buckler Gun Battery, Sydney | |
| Type | Naval gun Coast defence gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1881–1918 |
| Used by | Royal Navy Australian colonies |
| Wars | World War I |
| Production history | |
| Variants | Mk I – VII |
| Specifications | |
| Mass | Mk I & II : 20 tons barrel & breech Mk III : 24 tons |
| Barrel length | Mk I & II : 230 inches (5,842 mm) bore & chamber (25 calibres) Mk III–VII : 290 inches (7,366 mm) (31.5 calibres) |
| Shell | 380 pounds (172.37 kg) 290 pounds (131.54 kg) (High-angle guns) |
| Calibre | 9.2-inch (233.7 mm) |
| Muzzle velocity | 2,065 feet per second (629 m/s) |
| Maximum firing range | 10,000 yards (9,100 m) |
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