HMS Inconstant was a pioneering unarmored, iron-hulled screw frigate constructed for the Royal Navy in the late 1860s. Laid down on 27 November 1866 at Pembroke Dockyard in Wales and launched on 25 March 1872, she represented an experimental response to contemporary naval developments, designed by Sir Edward Reed to match the speed of American wooden frigates. Measuring approximately 337 feet 4 inches (102.8 m) in length between perpendiculars, with a beam of 50 feet 3 inches (15.3 m) and a draught of 25 feet 6 inches (7.8 m), she displaced around 5,780 long tons (5,870 t). Her hull was sheathed in two layers of oak and copper to mitigate biofouling, enhancing her seaworthiness and speed. Powered by a John Penn and Sons two-cylinder trunk steam engine, she generated 7,360 indicated horsepower, reaching a top speed of 16.2 knots during sea trials, making her the fastest warship afloat at her completion. She also boasted a traditional three-mast ship rig with a sail area of 26,655 square feet, capable of reaching speeds of 13.5 knots under sail alone, and could hoist her propeller into the hull to reduce drag under sail conditions. Armament included ten rifled muzzle-loading 9-inch guns on the main deck and six 7-inch guns on the upper deck, providing formidable firepower for her size. Her complement was about 600 officers and ratings, and her design prioritized both speed and seafaring stability. HMS Inconstant served initially with the Channel Squadron, briefly with the Detached Squadron, before being placed in reserve in 1872. Recommissioned in 1880, she served as flagship of the Mediterranean Fleet’s Detached Squadron during a circumnavigation of the globe, participating in notable events such as supporting operations during the Anglo-Egyptian War of 1882. After her active service, she functioned as an accommodation ship, gunnery training vessel, and torpedo training ship, under various names, until she was sold for scrap in 1955. Notably, she was the second-to-last surviving Welsh-built warship, marking her significance in maritime history as a symbol of naval innovation and adaptability during a transformative period.

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