The French ironclad La Gloire was the first ocean-going ironclad in history. She was developed following the Crimean War, in response to new developments in naval gun technology, especially the Paixhans guns and rifled guns, which used explosive shells with increased destructive power against wooden ships, and followed the development of the ironclad floating batteries built by the British and French for the bombardment of Russian forts during the Crimean War. She was designed by the French naval architect Dupuy de Lôme, and was launched at the arsenal of Mourillon, Toulon, on 24 November 1859. A 5,630-ton broadside ironclad, she had a wooden hull. Her 12 cm-thick armour plates, backed with 43 cm of timber, resisted the experimental firing of the strongest guns of the time at full charge, at a distance of 20 metres. Her official top speed was 13.1 knots but other reports suggested no more than 11.75 knots had been reached and that 11 knots was the practical maximum. As was common for the era, La Gloire was constructed with sails as well as a steam-powered screw. The original rigging was a light barquentine rig providing 1,096 sq. m of surface area. This was later increased to a full rig providing 2,508 sq. m of surface. Wikipedia [ - ]

The French ironclad La Gloire was the first ocean-going ironclad in history. She was developed... [ + ]