Bulwark-class ship of the line
| Royal Alfred in 1867 | |
| Class overview | |
|---|---|
| Operators | Royal Navy | 
| Preceded by | Duncan class | 
| Built | 1859–1870 | 
| In commission | 1863–1889 | 
| Planned | 12 | 
| Completed | 7 | 
| Cancelled | 5 (including 2 "suspended" on the stocks and never finished) | 
| General characteristics | |
| Type | Steam two-decker 91-gun line-of-battle ship | 
| Displacement | 5,950 long tons (6,045 t) | 
| Tons burthen | 3715 tons BM | 
| Length | 
 | 
| Beam | 58 ft (18 m) | 
| Draught | 25 ft 6 in (7.77 m) | 
| Propulsion | 
 | 
| Sail plan | 
 | 
| Speed | 12.5–13.4 knots (23.2–24.8 km/h) under power | 
| Complement | 860 | 
| Armament | 
 | 
The Bulwark class were the final class of wooden line-of-battle ships laid down for the Royal Navy. They were laid down after HMS Warrior. In March 1861 their construction was suspended, and seven were later converted to iron-clads. HMS Bulwark and HMS Robust were kept on the stocks almost complete, in case of need, until they were scrapped in 1873 and 1872.