| History | |
|---|---|
 United Kingdom | |
| Name | HMS L25 |
| Builder | Vickers Limited, Barrow-in-Furness |
| Laid down | 25 February 1918 |
| Launched | 13 February 1919 |
| Fate | Sold for scrapping, 1935 |
| General characteristics | |
| Class and type | L-class submarine |
| Displacement |
|
| Length | 238 ft 7 in (72.7 m) |
| Beam | 23 ft 6 in (7.2 m) |
| Draught | 13 ft 3 in (4.0 m) |
| Installed power |
|
| Propulsion |
|
| Speed |
|
| 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 | 38 |
| Armament |
|
HMS L25 was a L-class submarine built for the Royal Navy during World War I. She was one of five boats in the class to be fitted as a minelayer. The boat survived the war and was sold for scrap in 1935.
Design and description
L9 and its successors were enlarged to accommodate 21-inch (53.3 cm) torpedoes and more fuel. The submarine had a length of 238 feet 7 inches (72.7 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 914 long tons (929 t) on the surface and 1,089 long tons (1,106 t) submerged. The L-class submarines had a crew of 38 officers and ratings.
For surface running, the boats were powered by two 12-cylinder Vickers 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. 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. On the surface, the L class had a range of 3,800 nautical miles (7,000 km; 4,400 mi) at 10 knots (19 km/h; 12 mph).
The boats were armed with four 21-inch torpedo tubes in the bow. They carried four reload torpedoes for the 21-inch tubes for a grand total of eight torpedoes. They were also armed with a 4-inch (102 mm) deck gun. L25 was fitted with 14 vertical mine chutes in her saddle tanks and carried one mine per chute.
Construction and career
HMS L25 was built by Vickers, Barrow-in-Furness. She was laid down on 25 February 1918 and was commissioned on 13 February 1919.
L25 ran aground off The Needles, Isle of Wight, on 7 April 1924. She was refloated later that day.
L25 was sold to John Cashmore Ltd for scrapping at Newport, Wales, in 1935. Her ship's bell is in the care of the Royal Navy Submarine Museum.
Notes
- ^ Gardiner & Gray, p. 93
- ^ Akermann, p. 165
- Harrison, Chapter 25
- Harrison, Chapters 3
- Harrison, Chapter 27
- "L25 aground near The Needles". The Times. No. 43621. London. 8 April 1924. col A, p. 16.
References
- Akermann, Paul (2002). Encyclopaedia of British Submarines 1901–1955 (reprint of the 1989 ed.). Penzance, Cornwall: Periscope Publishing. ISBN 1-904381-05-7.
- Colledge, J. J.; Warlow, Ben (2006) . Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.
- Gardiner, Robert & Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 0-85177-245-5.
- Harrison, A. N. (January 1979). "The Development of HM Submarines From Holland No. 1 (1901) to Porpoise (1930) (BR3043)". RN Subs. Retrieved 27 September 2022.
| British L-class submarines | |||||||
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 Royal Navy |
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 Soviet Navy |
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| Shipwrecks and maritime incidents in 1924 | |
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| Shipwrecks |
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| Other incidents |
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1923   1925 | |