French ship Impérial (1856)

Impérial was one of five second-rank, 90-gun, steam-powered Algésiras-class ship of the line ships of the line built for the French Navy in the 1850s. The ship participated in the Second Italian War of Independence in 1859 and the Second French intervention in Mexico in 1862. She was scrapped in 1897.

Description
The Algésiras-class ships were repeats of the pioneering ship of the line FRENCH SHIP Napoléon and were also designed by naval architect Henri Dupuy de Lôme. They had a length at the waterline of 71.23 m, a beam of 16.8 m and a depth of hold of 8.16 m. The ships displaced 5121 t and had a draught of 8.45 m at deep load. Their crew numbered 913 officers and ratings.

The primary difference between Napoléon and the Algésiras class was that the boilers of the latter ships were moved forward of the engines. They were powered by a pair of four-cylinder horizontal-return connecting-rod steam engines that drove the single propeller shaft using steam provided by eight boilers. The engines were rated at 900 nominal horsepower and produced 3603 PS for a speed of 13 kn. The ships were fitted with three masts and ship rigged.

The armament of the Algésiras-class ships consisted of eighteen 36-pounder (174.8 mm) smoothbore cannon and sixteen 223.3 mm Paixhans guns on the lower gundeck and thirty-four 30-pounder 164.7 mm cannon on the upper gundeck. On the quarterdeck and forecastle were twenty 163 mm Paixhans guns and a pair of 163 mm rifled muzzle-loading guns.

Career
Impérial took part in the Second Italian War of Independence and the Second French intervention in Mexico. She was renamed Jupiter in 1870, used as a barracks ship, and eventually broken up in 1897.