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
Class overview
Name	River-class destroyer
Operators	Royal Australian Navy
Built	1910–1915
In commission	1911–1925
Completed	6
Lost	0
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. A further six ships were built to the same design for the Royal Australian Navy as River-class destroyers.^[2] 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]}

Cite error: There are <ref group=Note> tags on this page, but the references will not show without a {{reflist|group=Note}} template (see the help page).