100-ton gun
The 100-ton gun (also known as the Armstrong 100-ton gun) was a 17.72-inch (450 mm) rifled muzzle-loading (RML) gun made by Elswick Ordnance Company, the armaments division of the British manufacturing company Armstrong Whitworth, owned by William Armstrong. The 15 guns Armstrong made were used to arm two Italian battleships and, to counter these, British fortifications at Malta and Gibraltar.
| Armstrong 100-ton gun | |
|---|---|
"Rockbuster" at Napier of Magdala Battery, Gibraltar | |
| Type | Naval gun Coast defence gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1877-1906 |
| Production history | |
| Designer | Elswick Ordnance Company |
| Unit cost | £16,000 (£176,000 today) |
| No. built | 15 |
| Specifications | |
| Mass | 103 tons |
| Barrel length | bore: 362.9 inches (9.22 m) (20.5 calibres) |
| Shell | HE, AP, Shrapnel, 2,000 pounds (910 kg) |
| Calibre | 450-millimetre (17.72 in) |
| Recoil | 1.75 m (5 ft 9 in) |
| Elevation | 10° 30' |
| Traverse | 150° |
| Muzzle velocity | 1,548 feet per second (472 m/s) |
| Maximum firing range | 6,600 yards (6,000 m) |
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