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 [1]
Type	Steam two-decker 91-gun line-of-battle ship
Displacement	5,950 long tons (6,045 t)
Tons burthen	3715 tons BM
Length	252 ft (77 m) o/a 213 ft 9.25 in (65.1574 m) in keel-line
Beam	58 ft (18 m)
Draught	25 ft 6 in (7.77 m)
Propulsion	800 nhp steam engine 3,400–3,500 ihp (2,535–2,610 kW)
Sail plan	Main mast : 67 ft × 40 in Fore mast : 61 ft × 37 in Mizzen mast : 51 ft 6 in × 27 in
Speed	12.5–13.4 knots (23.2–24.8 km/h) under power
Complement	860
Armament	Gun Deck: 34 × 8-inch (204 mm) 65cwt guns Main deck: 36 × 32-pounder/58cwt Upper Deck: 20 × 32-pounder/45cwt, 1 × 68-pounder 95cwt gun

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.