HMS L71
HMS L71 was a late-model L-class submarine built for the Royal Navy during the First World War. The boat was not completed before the end of the war and was sold for scrap in 1938.
| History | |
|---|---|
 United Kingdom | |
| Name: | HMS L71 |
| Builder: | Scotts Shipbuilding and Engineering Company, Greenock |
| Laid down: | 29 August 1917 |
| Launched: | 17 May 1919 |
| Commissioned: | 23 December 1919 |
| Fate: | Sold for scrapping, 25 March 1938 |
| General characteristics | |
| Class and type: | L-class submarine |
| Displacement: |
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| Length: | 235 ft (71.6 m) |
| Beam: | 23 ft 6 in (7.2 m) |
| Draught: | 13 ft 2 in (4.0 m) |
| Installed power: |
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| Propulsion: |
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| Speed: |
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| Range: | 4,500 nmi (8,300 km; 5,200 mi) at 8 kn (15 km/h; 9.2 mph) on the surface |
| Test depth: | 150 feet (45.7 m) |
| Complement: | 44 |
| Armament: |
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Design and description
L52 and its successors were modified to maximise the number of 21-inch (53.3 cm) torpedoes carried in the bow. The submarine had a length of 235 feet (71.6 m) overall, a beam of 23 feet 6 inches (7.2 m) and a mean draft of 13 feet 2 inches (4.0 m).[1] 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 44 officers and ratings.[2] They had a diving depth of 150 feet (45.7 m).[3]
For surface running, the boats were powered by two 12-cylinder Vickers[4] 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 4,200 nautical miles (7,800 km; 4,800 mi) at 10 knots (19 km/h; 12 mph).[1]
The boats were armed with six 21-inch torpedo tubes in the bow. They carried eight reload torpedoes for a grand total of a dozen torpedoes.[5] They were also armed with two 4-inch (102 mm) deck guns.[2]
Construction and career
HMS L71 was laid down on 29 August 1917 by Scotts Shipbuilding and Engineering Company at their Greenock shipyard, launched on 17 May 1919, and completed on 23 January 1920.
On commissioning, L71 joined the 2nd Submarine Flotilla, based at Devonport.[6] The boat was sold for scrap on 25 March 1938 at Milford Haven.
Notes
- Gardiner & Gray, p. 94
- Akermann, p. 165
- Harrison, Chapter 11
- Harrison, Chapter 25
- Harrison, Chapter 27
- "I.—Atlantic Fleet: Submarines". The Navy List. February 1920. pp. 702–3. Retrieved 10 September 2020 – via National Library of Scotland.
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) [1969]. 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)". Submariners Association: Barrow in Furness Branch. Archived from the original on 19 May 2015. Retrieved 19 August 2015.