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FIGHTING SHIPS OF THE WORLD
FRANCE
SHIPS-OF-THE LINE, CAPITAL SHIPS AND MONITORS
ROCHAMBEAU broadside ironclad (1867)


Ships


Name No Yard No Builder Laid down Launched Comp Fate
Rochambeau (ex-Dundenberg)     W. H. Webb, New York, USA 3.10.1862 22.7.1865 7.8.1867 stricken 4.1872


Technical data


Displacement normal, t

7800

Displacement full, t 
Length, m

107.4 pp 115.0 oa

Breadth, m

22.2

Draught, m

6.52 mean

No of shafts

1

Machinery

1 2-cyl HSE return connecting rod, 6 'return flame' tubular boilers

Power, h. p.

4500

Max speed, kts

15

Fuel, t

coal 540 - 1000

Endurance, nm(kts)1200(8)
Armour, mmwrought iron; belt: 89 - 63, deck: 18, casemate: 114, CT: 250
Armament

4 x 1 - 274/18 M1864-66 MLR, 10 x 1 - 240/18 M1864-66 MLR

Complement600


Project history

Build largely of green wood with weak framing and very heavy longitudinal timbers, the sides being 2.3m thick at the knuckle, this ship had a low hull with pronounced ram bow and an amidships casemate on the lines of the better known Virginia (Merrimack). The hull armour sloped outwards and the casemate inwards, both at 35°. There were 22 gun ports, six on each broadside, two at each corner and two axial, four of the 279mm SBML guns being arranged to traverse at these end ports, while the 381mm were at the foremost broadside ones. The port sill height was only 1.4m. There was a light brigantine rig, and though US trials in June 1867 gave only 11.7 kts at 3778 ihp, a maximum of 15.07 kts at 4535 ihp and designed draught was claimed in France a year later. Named the Rochambeau by the French she was rearmed with French guns, but was only commissioned for some weeks in 1870.

Ship protection

Belt had 89-63mm and casemate 114mm iron armour with 0.9m timber backing.

Modernizations

None.

Naval service

No significant events.