Caio Duilio-class ironclad

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For the class of battleships built in the 1910s, see Andrea Doria-class battleship.
Class overview
Name: Caio Duilio-class ironclad
Operators:  Regia Marina
Preceded by: Principe Amedeo class
Succeeded by: Italia class
Built: 1873–82
In service: 1880–1920
Completed: 2
Scrapped: 2
General characteristics
Type: Ironclad
Displacement: 11,138 long tons (11,317 t)
12,267 long tons (12,464 t) full
Length: 109.2 m (358 ft 3 in)
Beam: 19.79 m (64 ft 11 in)
Draught: 8.8 m (28 ft 10 in)
Installed power: 7,710 ihp (5,749 kW)
8 coal-fired boilers
Propulsion: 2 shafts, two double-expansion steam engines
Speed: 15 knots (28 km/h; 17 mph) at
Range: 3,760 nmi (6,960 km) at
Complement: 420
  • Waterline belt: 550 mm (22 in)
  • Turrets: 450 mm (18 in)
  • Citadel: 400 mm (16 in)

The Caio Duilio class was a class of ironclads built for the Royal Italian Navy (Regia Marina) in the 1870s. A revolutionary design fitted with the largest guns available, 100-ton 450 mm calibre muzzle-loading guns, they were regarded as the most powerful warships afloat in their day.