| RML 8-inch 9-ton gun | |
|---|---|
 Gundeck of HMS Northumberland | |
| Type | Naval gun Coast defence gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1866–190? |
| Used by | Royal Navy |
| Production history | |
| Manufacturer | Royal Arsenal |
| Unit cost | £568[1] |
| Variants | Mk I – Mk III |
| Specifications | |
| Mass | 9 long tons (9.1 t) |
| Barrel length | 118 inches (3.0 m) bore + chamber[2] |
| Shell | 174 pounds 12 ounces (79.3 kg)[3] |
| Calibre | 8-inch (203.2 mm) |
| Muzzle velocity | 1,420 feet per second (430 m/s)[4] |
The British RML 8-inch 9-ton guns Mark I – Mark III[5] were medium rifled muzzle-loading guns used to arm smaller ironclad warships and coast defence batteries in the later 19th century.
- ^ Unit cost of £567 12 shillings 10 pence is quoted in "The British Navy" Volume II, 1882, by Sir Thomas Brassey. Page 38
- ^ Text Book of Gunnery 1887 Table XVI page 313
- ^ 174 lb 12 oz projectile. Text Book of Gunnery 1887 Table XVI page 313
- ^ 1,420 feet/second firing 174-pound 12-oz projectile . Text Book of Gunnery 1887 Table XVI page 313
- ^ Mark I – Mark III = Mark 1 through to Mark 3. Britain used Roman numerals to denote Marks (models) of ordnance until after World War II. Hence this article describes the three models of RML 8-inch guns.