HMS Colossus was an 80-gun second-rate ship of the line, part of the Vanguard class designed by Sir William Symonds. Built at Pembroke Dockyard, she was laid down in October 1843, launched on 1 June 1848, and completed by 3 July of the same year. Initially, she was not fitted out for active service and was placed in ordinary, with a construction cost of approximately £59,119. The Vanguard-class ships were characterized by their slightly varied hull designs, intended to assess their speed and handling. HMS Colossus measured 190 feet 8 inches (58.1 meters) at the gundeck and 153 feet 6 inches (46.8 meters) at the keel, with a beam of 57 feet (17.4 meters), a draught of 18 feet 10 inches (5.7 meters), and a depth of hold of 23 feet 4 inches (7.1 meters). Her tonnage was 2,583 42/94 tons burthen, and her wartime crew comprised approximately 720 officers and ratings. Armament on HMS Colossus included a combination of smoothbore cannons and carronades: twenty 32-pounder (56 cwt) guns and two 68-pounder carronades on her lower gundeck; twenty-eight 32-pounder (50 cwt) guns and two 68-pounder carronades on the upper gundeck; fourteen 32-pounder (42 cwt) guns on the quarterdeck; and eight more 32-pounders on the forecastle deck, providing formidable firepower typical of ships of her class. In 1854–1855, HMS Colossus was modified to include steam propulsion. She was fitted with a two-cylinder horizontal trunk steam engine producing 1,458 indicated horsepower, driving a single screw propeller. This provided her with a maximum speed of 9.3 knots, marking her as part of the transitional period from sail to steam power. HMS Colossus served until she was sold for scrap in March 1867. Her relatively short service life reflects the rapid technological advancements of the era, but her conversion to steam underscores her role in the evolution of naval warfare and ship design during the mid-19th century.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.