Indefatigable was one of 10 ships of the class that were sheathed in wood and copper to reduce fouling when serving in tropical waters. She was 314 ft 0 in (95.71 m) long overall and 300 ft (91.44 m) between perpendiculars, with a beam of 43 ft 8 in (13.31 m) and a draught of 18 ft 6 in (5.64 m). Displacement was 3,600 long tons (3,700 t).[1] Five cylindrical fire-tube boilers fed steam to two Triple-expansion engines rated at 7,000 ihp (5,200 kW) natural draught and 9,000 ihp (6,700 kW) with forced draught. This gave a design speed with forced draught of 18.75 kn (21.6 mph; 34.7 km/h).[1]
An armoured deck of between 1+1⁄4 inches (32 mm) and 2 inches (51 mm) protected the ship's magazines and machinery, while the ship's conning tower had 3 inches (76 mm) of armour and the gunshields 4+1⁄2 inches (110 mm). Two QF 6-inch (152 mm) guns were mounted fore and aft on the ship's centreline, while six 4.7 in (120 mm) guns were mounted three on each broadside. 8 six pounder guns and 1 three pounder provided protection against torpedo boats.[1]
In 1905, Indefatigable went into reserve at Portsmouth, recommissioning in January 1906 as part of the 4th Cruiser Squadron on the North America and West Indies Station. On 11 January 1910, she was renamed Melpomene, freeing up the name Indefatigable for a new battlecruiser.[6] In May 1912, Melpomene was active off the coast of Mexico during the Mexican Revolution, and was reported to be about to land a force of Marines to protect British subjects.[7][8]
Melpomene was employed in the Training Squadron from 1912 to 1913,[6] and was sold for scrap to the shipbreakers Ward on 7 October 1913,[9][2] at a price of £15,800.[10]
