HMS Undaunted (1914)

Aerial view circa. 1914-1918
History
United Kingdom
Name:	HMS Undaunted
Builder:	Fairfield Shipbuilding and Engineering Company, Govan
Laid down:	21 December 1912
Launched:	28 April 1914
Commissioned:	August 1914
Fate:	Sold for scrap, 9 April 1923
General characteristics (as built)
Class and type:	Arethusa-class light cruiser
Displacement:	3,512 long tons (3,568 t)
Length:	410 ft (125.0 m) p/p 436 ft (132.9 m) o/a
Beam:	39 ft (11.9 m)
Draught:	15 ft 7 in (4.75 m) (mean, deep load)
Installed power:	40,000 shp (30,000 kW) 8 × Yarrow boilers
Propulsion:	4 × shafts; 4 × steam turbines
Speed:	28.5 kn (52.8 km/h; 32.8 mph)
Range:	3,200 nmi (5,900 km; 3,700 mi) at 16 knots (30 km/h; 18 mph)
Complement:	270
Armament:	2 × single BL 6 in (152 mm) Mk XII guns 6 × single QF 4 in (102 mm) Mk V guns 1 × single QF 3-pounder (47 mm (1.9 in)) anti-aircraft gun 4 × 21 in (533 mm) torpedo tubes
Armour:	Waterline belt: 1–3 in (25–76 mm) Deck: 1 in (25 mm)

HMS Undaunted was one of eight Arethusa-class light cruisers built for the Royal Navy in the 1910s.

The Arethusa-class cruisers were intended to lead destroyer flotillas 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 and 5,795 long tons (5,888 t) at full load. Undaunted was powered by four Brown-Curtis steam 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). She carried 840 long tons (853 t) tons of fuel oil that gave a range of 3,200 nautical miles (5,900 km; 3,700 mi) at 16 knots (30 km/h; 18 mph).

The main armament of the Arethusa-class ships consisted of two BL 6-inch (152 mm) Mk XII guns that were mounted on the centreline fore and aft of the superstructure and six QF 4-inch Mk V guns in waist mountings. They were also fitted with a single QF 3-pounder (47 mm (1.9 in)) anti-aircraft gun and four 21 in (533 mm) torpedo tubes in two twin mounts.