''Impérial'' was one of five second-rank, 90-gun, steam-powered

ships of the line A ship of the line was a type of naval warship constructed during the Age of Sail from the 17th century to the mid-19th century. The ship of the line was designed for the naval tactic known as the line of battle, which depended on the two colum ...

built for the

French Navy The French Navy (french: Marine nationale, lit=National Navy), informally , is the maritime arm of the French Armed Forces and one of the five military service branches of France. It is among the largest and most powerful naval forces in t ...

in the 1850s. The ship participated in the

Second Italian War of Independence The Second Italian War of Independence, also called the Franco-Austrian War, the Austro-Sardinian War or Italian War of 1859 ( it, Seconda guerra d'indipendenza italiana; french: Campagne d'Italie), was fought by the Second French Empire and t ...

in 1859 and the

Second French intervention in Mexico The Second French Intervention in Mexico ( es, Segunda intervención francesa en México), also known as the Second Franco-Mexican War (1861–1867), was an invasion of Mexico, launched in late 1862 by the Second French Empire, which hoped to ...

in 1862. She was

scrapped Scrap consists of recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap has monetary value, especially recovered me ...

in 1897.

Description

The ''Algésiras''-class ships were repeats of the pioneering ship of the line and were also designed by

naval architect This is the top category for all articles related to architecture and its practitioners. {{Commons category, Architecture occupations Design occupations Architecture, Occupations ...

Henri Dupuy de Lôme Stanislas Charles Henri Dupuy de Lôme (; 15 October 18161 February 1885) was a French naval architect. He was the son of a naval officer and was born in Ploemeur near Lorient, Brittany, in western France. He was educated at the École Polytechn ...

. They had a length at the

waterline The waterline is the line where the hull of a ship meets the surface of the water. Specifically, it is also the name of a special marking, also known as an international load line, Plimsoll line and water line (positioned amidships), that indi ...

of , a

beam Beam may refer to: Streams of particles or energy *Light beam, or beam of light, a directional projection of light energy **Laser beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially localized grou ...

of and a depth of

hold Hold may refer to: Physical spaces * Hold (ship), interior cargo space * Baggage hold, cargo space on an airplane * Stronghold, a castle or other fortified place Arts, entertainment, and media * Hold (musical term), a pause, also called a Fermat ...

of . The ships displaced and had a draught of at

deep load The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into wei ...

. Their crew numbered 913 officers and ratings.Winfield & Roberts, p. 70 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 A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power and torque and rotation, usually used to connect ...

using steam provided by eight

boiler A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central h ...

s. The engines were rated at 900

nominal horsepower Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the ...

and produced for a speed of . The ships were fitted with three masts and

ship rig A full-rigged ship or fully rigged ship is a sailing vessel's sail plan with three or more masts, all of them square-rigged. A full-rigged ship is said to have a ship rig or be ship-rigged. Such vessels also have each mast stepped in three seg ...

ged. The armament of the ''Algésiras''-class ships consisted of eighteen 36-pounder ()

smoothbore A smoothbore weapon is one that has a barrel without rifling. Smoothbores range from handheld firearms to powerful tank guns and large artillery mortars. History Early firearms had smoothly bored barrels that fired projectiles without signi ...

cannon and sixteen

Paixhans gun The Paixhans gun (French: ''Canon Paixhans'', ) was the first naval gun designed to fire explosive shells. It was developed by the French general Henri-Joseph Paixhans in 1822–1823. The design furthered the evolution of naval artillery into the ...

s on the lower

gundeck The term gun deck used to refer to a deck aboard a ship that was primarily used for the mounting of cannon to be fired in broadsides. The term is generally applied to decks enclosed under a roof; smaller and unrated vessels carried their guns on ...

and thirty-four 30-pounder cannon on the upper gundeck. On the

quarterdeck The quarterdeck is a raised deck behind the main mast of a sailing ship. Traditionally it was where the captain commanded his vessel and where the ship's colours were kept. This led to its use as the main ceremonial and reception area on bo ...

and

forecastle The forecastle ( ; contracted as fo'c'sle or fo'c's'le) is the upper deck of a sailing ship forward of the foremast, or, historically, the forward part of a ship with the sailors' living quarters. Related to the latter meaning is the phrase " be ...

were twenty 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 A barracks ship or barracks barge or berthing barge, or in civilian use accommodation vessel or accommodation ship, is a ship or a non-self-propelled barge containing a superstructure of a type suitable for use as a temporary barracks for sai ...

,Roche, I, p. 251 and eventually broken up in 1897.Winfield & Roberts, p. 71

Citations

References

* * {{DEFAULTSORT:Imperial (1856) Ships of the line of the French Navy Algésiras-class ships of the line 1856 ships Ships built in France Napoléon-class ships of the line