Summary
HMS L69 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 1939.
| History | |
|---|---|
 United Kingdom | |
| Name | HMS L69 |
| Builder | William Beardmore and Company, Dalmuir |
| Laid down | 7 July 1917 |
| Launched | 6 December 1918 |
| Fate | Sold for scrapping, February 1939 |
| General characteristics | |
| Class and type | L-class submarine |
| Displacement |
|
| Length | 235 ft (71.6 m) |
| Beam | 23 ft 6 in (7.2 m) |
| Draught | 13 ft 2 in (4.0 m) |
| Installed power |
|
| Propulsion |
|
| Speed |
|
| 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 |
|
Design and description edit
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 960 long tons (980 t) on the surface and 1,150 long tons (1,170 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 edit
HMS L69 was laid down on 7 July 1917 by William Beardmore and Company at their Dalmuir shipyard and launched on 6 December 1918. She was then towed to HM Dockyard, Rosyth for completion on 18 April 1923. The boat was sold to Arnott Young in February 1939 for scrap.
Notes edit
References edit
- 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)". RN Subs. Retrieved 27 September 2022.
at Dalmuir.