Emerald-class corvette

Last updated

HMSTurquoise.jpg
Turquoise at anchor
Class overview
NameEmerald class
OperatorsNaval Ensign of the United Kingdom.svg  Royal Navy
Preceded by HMS Rover
Succeeded by Bacchante class
Built1873–1878
Completed6
Scrapped6
General characteristics (as built)
Type Composite screw corvette
Displacement2,120 long tons (2,150 t)
Tons burthen1,864 bm
Length220 ft (67.1 m) (p/p)
Beam40 ft (12.2 m)
Draught18 ft (5.5 m)
Installed power2,031–2,364  ihp (1,515–1,763 kW)
Propulsion
Sail plan Ship rig
Speed12–13 knots (22–24 km/h; 14–15 mph)
Range2,000–2,280  nmi (3,700–4,220 km; 2,300–2,620 mi) at 10 knots (19 km/h; 12 mph)
Complement230
Armament

The Emerald-class corvettes were a class of six composite screw corvettes built for the Royal Navy in the mid-1870s. The Opal was built by contract under the 1873-74 Programme, and Turquoise, Ruby, Tourmaline and Emerald under the 1874-75 Programme - the first three also by contract, while Emerald was dockyard-built at Pembroke. The final ship (Garnet) was also dockyard-built at Chatham under the 1875-76 Programme.

Contents

Design and construction

The construction used iron frames, with wooden cladding around the frames. These were two-decked ships, with the ordnance on the upper deck and accommodation on the main deck below. They were designed to carry the same armament of fourteen 64-pdr guns as the preceding Amethyst class corvettes from which their design was developed, with two of the guns mounted on rotating slides as bow and stern chasers, and the other twelve guns slide-mounted on the broadsides.

However, only Opal was so completed, and two of her broadside guns were removed following her first commission. Tourmaline was built with the same number of ports, but with only ten broadside guns vice twelve (plus the two chase guns). The other four vessels were completed with this ordnance (two chasers and ten broadside guns, without ports for a sixth pair of broadside guns) - all these guns being of the 64cwt model. In the early 1880s Tourmaline and Emerald were re-armed with four 6-inch (100-pdr) and eight 5-inch (50-pdr) breach-loader guns.

Ships

ShipBuilder [1] Laid down [2] Launched [2] Completed [2] Fate [2] Cost [2]
Opal William Doxford, Sunderland 13 October 18739 March 1875January 1876Sold for scrap, 11 August 1892£95,949
Turquoise Earle's Shipbuilding, Hull 8 July 187422 April 187613 September 1876Sold for scrap, 24 September 1892£95,547
Ruby Earle's Shipbuilding, Hull8 July 18749 August 187614 June 1877Converted to coal hulk, December 1904; sold for scrap, 16 February 1921£93,116
Tourmaline Raylton Dixon, Middlesbrough 17 July 187430 October 1875January 1874Converted to coal hulk, 1899; sold for scrap, November 1920£95,769
Emerald Pembroke Dockyard 29 July 187418 August 18762 July 1878Converted to powder hulk, 1898; sold for scrap, 10 July 1906£98,442
Garnet Chatham Dockyard 16 March 187530 June 187731 October 1878Sold for scrap, December 1904£92,468

Footnotes

  1. Chesneau & Kolesnik, p. 51
  2. 1 2 3 4 5 Lyon & Winfield, p. 289

Bibliography

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