1917 British L-class submarine
 HMS L5
|
| History |
|---|
 United Kingdom |
|---|
| Name | HMS L5 |
| Builder | Swan Hunter, Wallsend |
| Laid down | 23 August 1916 |
| Launched | 26 January 1918 |
| Commissioned | 15 May 1918 |
| Fate | Sold for scrapping, 1931 |
| General characteristics |
|---|
| Class and type | L-class submarine |
| Displacement |
- 891 long tons (905 t) surfaced
- 1,074 long tons (1,091 t) submerged
|
| Length | 231 ft 1 in (70.4 m) |
| Beam | 23 ft 6 in (7.2 m) |
| Draught | 13 ft 3 in (4.0 m) |
| Installed power |
- 2,400 bhp (1,800 kW) (diesel)
- 1,600 hp (1,200 kW) (electric)
|
| Propulsion | |
| Speed |
- 17 kn (31 km/h; 20 mph) surfaced
- 10.5 kn (19.4 km/h; 12.1 mph) submerged
|
| Range | 3,800 nmi (7,000 km; 4,400 mi) at 10 kn (19 km/h; 12 mph) on the surface |
| Test depth | 100 feet (30.5 m) |
| Complement | 35 |
| Armament | |
HMS L5 was a L-class submarine built for the Royal Navy during World War I. The boat survived the war and was sold for scrap in 1931.
Design and description
The L-class boats were enlarged and improved versions of the preceding E class. The submarine had a length of 231 feet 1 inch (70.4 m) overall, a beam of 23 feet 6 inches (7.2 m) and a mean draft of 13 feet 3 inches (4.0 m). They displaced 891 long tons (905 t) on the surface and 1,074 long tons (1,091 t) submerged. The L-class submarines had a crew of 35 officers and ratings.[1]
For surface running, the boats were powered by two 12-cylinder Vickers[2] 1,200-brake-horsepower (895 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 600-horsepower (447 kW) electric motor.[1] They could reach 17 knots (31 km/h; 20 mph) on the surface and 10.5 knots (19.4 km/h; 12.1 mph) underwater.[3] On the surface, the L class had a range of 3,200 nautical miles (5,900 km; 3,700 mi) at 10 knots (19 km/h; 12 mph).[1]
The boats were armed with a total of six 18-inch (45 cm) torpedo tubes. Four of these were in the bow and the remaining pair in broadside mounts. They carried 10 reload torpedoes, all for the bow tubes.[4] They were also armed with a 4-inch (102 mm) deck gun.[5]
Construction and career
HMS L5 was laid down on 23 August 1916 by Swan Hunter at their Wallsend shipyard, launched on 1 September 1917, and completed on 15 May 1918. She was based at Falmouth, Cornwall in 1918. L5 was assigned to the 4th Submarine Flotilla and HMS Titania in 1919 and sailed to Hong Kong, arriving on 14 April 1920. She served on the China Station with other vessels of this class in the 1920s. On 20 October 1927 off Hong Kong, L5 and HMS L4 rescued the crew of the merchant ship SS Irene from a pirate attack after firing her deck gun. HMS L5 was sold in 1931 and broken up in Charlestown, Fife.
