HMS Mercury (1878)
From Wikipedia, the free encyclopedia
Mercury | |
| History | |
|---|---|
| Name | Mercury |
| Builder | Pembroke Dockyard |
| Laid down | 16 March 1876 |
| Launched | 17 April 1878 |
| Completed | September 1879 |
| Reclassified |
|
| Fate | Sold for scrap, 9 July 1919 |
| General characteristics | |
| Class & type | Iris-class despatch vessel, later second-class cruiser |
| Displacement | 3,730 long tons (3,790 t) |
| Length | 315 ft (96 m) |
| Beam | 46 ft (14 m) |
| Draught | 20 ft 6 in (6.2 m) |
| Installed power | 12 boilers; 6,000 ihp (4,500 kW) |
| Propulsion | 2 × shafts; 2 × compound-expansion steam engines |
| Sail plan | Barque-rigged |
| Speed | 17 knots (31 km/h; 20 mph) |
| Range | 4,950 nmi (9,170 km; 5,700 mi) at 10 knots (19 km/h; 12 mph) |
| Complement | 275 |
| Armament | 10 × 64 pdr rifled muzzle-loading (RML) guns |
HMS Mercury was one of two Iris-class despatch vessels, later redesignated as second class cruiser built for the Royal Navy during the 1870s. The two ships were the first all-steel warships in the Royal Navy.
The Iris-class ships were designed as dispatch vessels and were later redesignated as second-class protected cruisers. Mercury had an overall length of 315 feet (96 m), a beam of 46 feet (14 m), and a draught of 20 feet 6 inches (6.2 m). The ships displaced 3,730 long tons (3,790 t) at normal load[1] and were the first British warships with an all-steel hull.[2] Their crew consisted of 275 officers and ratings.[1]
The Iris class was powered by a pair of horizontal four-cylinder Maudslay, Sons and Field compound-expansion steam engines, each driving one propeller shaft using steam from eight oval and four cylindrical boilers.[1] The engines were designed to produce a total of 6,000 indicated horsepower (4,500 kW) for a speed of 17 knots (31 km/h; 20 mph). Mercury reached a maximum speed of 18.57 knots (34.39 km/h; 21.37 mph) from 7,735 ihp (5,768 kW), making her the fastest warship in the world.[3] The ship carried enough coal to steam 4,950 nautical miles (9,170 km; 5,700 mi) at 10 knots (19 km/h; 12 mph).[1] Originally equipped with a light barque rig, her spars were soon removed and the class became the first "mastless cruisers".[4]
The Iris-class ships were originally armed with ten 64-pounder (6.3-inch (160 mm)) rifled muzzle-loading (RML) guns, eight on the main deck and the remaining pair on the upper deck on pivot mounts to serve as chase guns fore and aft.[1]