HMS R12
{{short description|Submarine of the Royal Navy}}
{{Use dmy dates|date=July 2017}}
{{Use British English|date=July 2017}}
| {{Infobox ship begin}}
{{Infobox ship image |Ship image=File:R class submarine.svg |Ship caption=R-class submarine }} {{Infobox ship career |Hide header= |Ship country=United Kingdom |Ship flag= {{shipboxflag|United Kingdom|naval}} |Ship name=HMS R12 |Ship ordered= |Ship awarded= |Ship builder=Cammell Laird, Birkenhead |Ship original cost= |Ship yard number= |Ship way number= |Ship laid down=1 December 1917 |Ship launched=9 April 1918 |Ship sponsor= |Ship christened= |Ship completed= |Ship acquired= |Ship commissioned=29 October 1919 |Ship decommissioned=December 1919 |Ship in service= |Ship out of service= |Ship renamed= |Ship reclassified= |Ship refit= |Ship struck= |Ship reinstated= |Ship homeport= |Ship identification= |Ship motto= |Ship nickname= |Ship honours= |Ship captured= |Ship fate= Sold, 21 February 1923 |Ship notes= |Ship badge= }} {{Infobox ship characteristics |Hide header= |Header caption= |Ship class=R-class submarine |Ship tonnage= |Ship displacement=*{{convert|410|LT|t|0}} surfaced
|Ship length={{convert|163|ft|9|in|m|abbr=on}} |Ship beam={{convert|15|ft|3|in|m|abbr=on}} |Ship draught={{convert|11|ft|6|in|m|abbr=on}} |Ship power=*{{convert|240|bhp|kW|lk=in|abbr=on}} (diesel)
|Ship propulsion=*1 × diesel engine
|Ship speed=*{{convert|9.5|kn|lk=in}} surfaced
|Ship range={{convert|2400|nmi|abbr=on|lk=in}} at {{convert|9|kn |
|Ship test depth={{convert|150|ft|1}}
|Ship complement=2 officers and 20 ratings
|Ship sensors=Bow hydrophone array
|Ship armament=6 × bow 18-inch (45 cm) torpedo tubes
|Ship notes=
}}
|}
HMS R12 was one of 10 R-class submarines 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 1923.
Design and description
The R-class submarine was designed to meet an Admiralty requirement for a specialised hunter-killer submarine with an emphasis on submerged performance. The boats had a length of {{convert|163|ft|9|in|m|1}} overall, a beam of {{convert|15|ft|3|in|m|1}} and a mean draft of {{convert|11|ft|6|in|m|1}}. They displaced {{convert|410|LT|t}} on the surface and {{convert|503|LT|t}} submerged. The R-class submarines had a crew of 2 officers and 20 ratings.Gardiner & Gray, p. 93 They had a diving depth of {{convert|150|ft|1}}.Harrison, Chapter 19
For surface running, the boats were powered by a single eight-cylinder Harrison, Chapter 25 {{convert|240|bhp|lk=in|0|adj=on}} diesel engine that drove the single propeller shaft. When submerged it was driven by a {{convert|1200|hp|0|adj=on}} electric motor. They could reach {{convert|9.5|kn|lk=in}} on the surface and {{convert|15|kn}} underwater. On the surface, the R class had a range of {{convert|2400|nmi|lk=in}} at {{convert|9|kn|}} and {{convert|60|nmi|abbr=on|lk=in}} at {{convert|5|kn|}} submerged.Harrison, Chapter 10
The boats were armed with six 18-inch (45 cm) torpedo tubes in the bow. They carried six reload torpedoes for a grand total of a dozen torpedoes. They were equipped with an array of five hydrophones in the bow to allow them to locate and engage targets while submerged.
Construction and career
HMS R12 was laid down on 1 December 1917 by Cammell Laird at Birkenhead, launched on 9 April 1918 and commissioned on 29 October 1919. She came too late to see any combat in World War I, like most of the other R class submarines. R12 was paid off in December 1919, and sold on 21 February 1923 to J. Smith.
Notes
{{reflist|30em}}
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 R-class submarine}}
{{DEFAULTSORT:R12}}
Category:British R-class submarines