The Arethusa-class cruisers were intended to lead destroyerflotillas and defend the fleet against attacks by enemy destroyers. The ships were 456 feet 6 inches (139.1 m) long overall, with a beam of 49 feet 10 inches (15.2 m) and a deep draught of 15 feet 3 inches (4.6 m). Displacement was 5,185 long tons (5,268 t) at normal[3] and 5,795 long tons (5,888 t) at full load. Inconstant was powered by four Parsonssteam turbines, each driving one propeller shaft, which produced a total of 40,000 indicated horsepower (30,000 kW). The turbines used steam generated by eight Yarrow boilers which gave her a speed of about 28.5 knots (52.8 km/h; 32.8 mph).[4] She carried 840 long tons (853 t) tons of fuel oil[3] that gave a range of 5,000 nautical miles (9,300 km; 5,800 mi) at 16 knots (30 km/h; 18 mph).[5]
Corbett, Julian. Naval Operations to the Battle of the Falklands. History of the Great War: Based on Official Documents. Vol. I (2nd, reprint of the 1938 ed.). London and Nashville, Tennessee: Imperial War Museum and Battery Press. ISBN0-89839-256-X.
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Gardiner, Robert & Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN0-85177-245-5.
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Pearsall, Alan (1984). "Arethusa Class Cruisers, Part I". Warship. VIII. London: Conway Maritime Press: 203–11. ISBN0-87021-983-9.
Pearsall, Alan (1984). "Arethusa Class Cruisers, Part II". Warship. VIII. London: Conway Maritime Press: 258–65. ISBN0-87021-983-9.
"Royal Navy Log Books - HMS Inconstant". naval-history.net. Retrieved 3 January 2014. OldWeather.org transcription of ship's logbooks December 1914 to February 1915