Acheron-class destroyer

HMS Acheron
Class overview
Name	Acheron-class destroyer
Operators	Royal Navy
Preceded by	Acorn class
Succeeded by	Acasta class
Built	1911–1912
In commission	1911–1922
Completed	23
Lost	3
General characteristics
Displacement	750 to 790 tons
Length	246 ft (75.0 m) to 252 ft (76.8 m)
Beam	26 ft (7.9 m) to 26 ft 9 in (8.15 m)
Draught	8 ft 6 in (2.59 m) to 9 ft (2.7 m)
Installed power	Standard I-class: 13,500 shp (10,067 kW) Acheron, Ariel: 15,500 shp (11,558 kW) Lurcher, Oak, Firedrake: 20,000 shp (14,914 kW)
Propulsion	Standard I-class: 3 × Parsons steam turbines 3 × Yarrow-type oil-fired boilers 3 × shafts Ferret, Forester: 3 × Parsons steam turbines 3 × White-Forster oil-fired boilers 3 × shafts Hind, Hornet, Hydra: 2 × Brown-Curtis turbines 2 × Yarrow-type oil-fired boilers 2 × Shafts Oak, Lurcher, Firedrake:[1] 2 × Parsons turbines 3 × Yarrow oil-fired boilers 2 × shafts
Speed	27 kn (50 km/h; 31 mph) – 35 kn (64.8 km/h; 40.3 mph)
Armament	2 × BL 4-inch (101.6 mm) L/40 Mark VIII guns, mounting P Mark V 2 × QF 12-pounder (76 mm) 12 cwt guns, mounting P Mark I 2 × single tubes for 21-inch (530 mm) torpedoes

The Acheron class (renamed the I class in October 1913) was a class of twenty-three destroyers of the British Royal Navy, all built under the 1910–11 Programme and completed between 1911 and 1912, which served during the First World War. There was considerable variation between the design and construction of ships within this class, which should be considered as more of a post-build grouping than a homogeneous class.^{[Note 1]}

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