HMS L12
{{Use dmy dates|date=December 2016}}
{{Use British English|date=December 2016}}
| {{Infobox ship begin}}
{{Infobox ship image |Ship image= HMSM L.12 and H.28 FL16246.jpg |Ship caption= HMS L12 and H28 }} {{Infobox ship career |Hide header= |Ship country= United Kingdom |Ship flag= {{shipboxflag|United Kingdom|naval}} |Ship name= HMS L12 |Ship namesake= |Ship ordered= |Ship builder=Vickers Limited, Barrow-in-Furness |Ship laid down=22 January 1917 |Ship launched=16 March 1918 |Ship acquired= |Ship commissioned=30 June 1918 |Ship decommissioned= |Ship in service= |Ship out of service= |Ship struck= |Ship reinstated= |Ship homeport= |Ship motto= |Ship nickname= |Ship honours= |Ship fate= Sold for scrapping, 16 February 1932 |Ship notes= }} {{Infobox ship characteristics |Hide header= |Header caption= |Ship class=L-class submarine |Ship displacement=*{{convert|914|LT|t|abbr=on}} surfaced
|Ship length={{convert|238|ft|7|in|m|1|abbr=on}} |Ship beam={{convert|23|ft|6|in|m|1|abbr=on}} |Ship draught={{convert|13|ft|3|in|1|abbr=on}} |Ship power=*{{convert|2400|bhp|kW|lk=in|abbr=on}} (diesel)
|Ship propulsion=*2 × diesel engines
|Ship speed=*{{convert|17|kn|lk=in}} surfaced
|Ship range={{convert|3800|nmi|abbr=on|lk=in}} at {{convert|10|kn}} on the surface |Ship test depth={{convert|150|ft|1}} |Ship complement=38 |Ship armament=*4 × bow British 21-inch torpedo torpedo tubes
|Ship notes= }} |
HMS L12 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 1932.
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 {{convert|238|ft|7|in|m|1}} overall, a beam of {{convert|23|ft|6|in|m|1}} and a mean draft of {{convert|13|ft|3|in|m|1}}.Gardiner & Gray, p. 93 They displaced {{convert|914|LT|t}} on the surface and {{convert|1089|LT|t}} submerged. The L-class submarines had a crew of 38 officers and ratings.Akermann, p. 165
For surface running, the boats were powered by two 12-cylinder VickersHarrison, Chapter 25 {{convert|1200|bhp|lk=in|0|adj=on}} diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a {{convert|600|hp|0|adj=on}} electric motor. They could reach {{convert|17|kn|lk=in}} on the surface and {{convert|10.5|kn}} underwater. On the surface, the L class had a range of {{convert|3800|nmi|lk=in}} at {{convert|10|kn}}.Harrison, Chapters 3
The boats were armed with four 21-inch torpedo tubes in the bow and two 18-inch (45 cm) in broadside mounts. They carried four reload torpedoes for the 21-inch tubes for a grand total of ten torpedoes of all sizes.Harrison, Chapter 27 They were also armed with a {{convert|4|in|mm|adj=on|0}} deck gun. L12 was fitted with 16 vertical mine chutes in her saddle tanks and carried one mine per chute.
Construction and career
HMS L12 was built by Vickers, Barrow-in-Furness. She was laid down on 22 January 1917 and was commissioned on 30 June 1918. The boat collided with the submarine {{HMS|H47}} off Milford Haven, Wales on 9 July 1929. She was able to surface and returned to Milford Haven; three sailors died. HMS L12 was sold to John Cashmore Ltd on 16 February 1932 for scrapping at Newport.
Notes
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References
- {{cite book|last=Akermann|first=Paul|title=Encyclopaedia of British Submarines 1901–1955|edition=reprint of the 1989|year=2002|publisher=Periscope Publishing|location=Penzance, Cornwall|isbn=1-904381-05-7}}
- {{Cite Colledge2006}}
- {{cite book |editor1-last=Gardiner|editor1-first=Robert|editor2-last=Gray|editor2-first=Randal|title=Conway's All the World's Fighting Ships 1906–1921|year=1985|location=Annapolis, Maryland|publisher=Naval Institute Press|isbn=0-85177-245-5|name-list-style=amp}}
- {{cite web|url=http://rnsubs.co.uk/dits-bits/br-3043.html|title=The Development of HM Submarines From Holland No. 1 (1901) to Porpoise (1930) (BR3043)|last=Harrison|first=A. N.|date=January 1979|publisher=RN Subs|access-date=27 September 2022}}
{{British L class submarine}}
{{1929 shipwrecks}}
{{DEFAULTSORT:L12}}
Category:British L-class submarines
Category:Ships built in Barrow-in-Furness
Category:World War I submarines of the United Kingdom