View source for HMS A11

{{short description|Submarine of the Royal Navy}}

{{Use dmy dates|date=February 2018}}
{{Use British English|date=February 2018}}
{|{{Infobox ship begin}}
{{Infobox ship image
|Ship image=A class submarines.jpg
|Ship caption=A group of {{sclass2|A|submarine|||1903}}s
}}
{{Infobox ship career
|Hide header=
|Ship country=United Kingdom
|Ship flag={{shipboxflag|United Kingdom|naval}}
|Ship name=''A11''
|Ship ordered=
|Ship awarded=
|Ship builder=[[Vickers#Vickers.2C Sons .26 Maxim|Vickers, Sons & Maxim Ltd.]] [[Barrow-in-Furness]]
|Ship original cost=
|Ship yard number=
|Ship way number=
|Ship laid down=1903
|Ship launched=8 March 1905
|Ship sponsor=
|Ship christened=
|Ship completed=
|Ship commissioned=11 July 1905
|Ship recommissioned=
|Ship decommissioned=
|Ship maiden voyage= 
|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 fate=Scrapped, May 1920
|Ship notes=
|Ship badge=
}}
{{Infobox ship characteristics
|Hide header=
|Header caption=
|Ship class={{sclass2|A|submarine|||1903}}
|Ship displacement=*{{convert|190|LT|t|0|abbr=on}} surfaced
*{{convert|206|LT|t|0|abbr=on}} submerged
|Ship length={{convert|105|ft|m|abbr=on|1}}
|Ship beam={{convert|12|ft|9|in|m|abbr=on|1}}
|Ship height=
|Ship draught={{convert|10|ft|8|in|m|abbr=on|1}}
|Ship depth=
|Ship power=*{{convert|600|bhp|lk=in|abbr=on}} ([[petrol engine]])
*{{convert|150|hp|abbr=on}} ([[electric motor]])
|Ship propulsion=*1 × 16-cylinder Wolseley petrol engine
*1 × electric motor
|Ship speed=*{{convert|11|kn|lk=in}} surfaced
*{{convert|6|kn}} submerged
|Ship range={{convert|500|nmi|lk=in}} at {{convert|10|kn|abbr=on}} surfaced
|Ship test depth=
|Ship complement=2 officers and 9 ratings
|Ship armament=2 × [[British 18 inch torpedo|18-inch (45&nbsp;cm)]] [[torpedo tube]]s
}}
|}

'''HMS ''A11''''' was an {{sclass2|A|submarine (1903)|0}} [[submarine]] built for the [[Royal Navy]] in the first decade of the 20th century. After surviving [[World War I]], she was sold for [[ship breaking|scrap]] in 1920.

==Design and description==
''A11'' was a member of the [[A-class submarine (1903)|first British class of submarines]], although slightly larger, faster and more heavily armed than the [[lead ship]], {{HMS|A1}}. The submarine had a length of {{convert|105|ft|1|in|m|1}} [[length overall|overall]], a [[beam (nautical)|beam]] of {{convert|12|ft|9|in|m|1}} and a mean [[draft (ship)|draft]] of {{convert|10|ft|8|in|m|1}}. They [[displacement (ship)|displaced]] {{convert|190|LT|t}} on the surface and {{convert|206|LT|t}} submerged. The A-class submarines had a crew of 2 officers and 9 [[Naval rating|ratings]].<ref name=gg9>Gardiner & Gray, p. 86</ref>

For surface running, the boats were powered by a single 16-cylinder {{convert|600|bhp|lk=in|0|adj=on}} [[Wolseley Motors|Wolseley]] [[petrol engine]] that drove one [[propeller shaft]]. When submerged the propeller was driven by a {{convert|150|hp|0|adj=on}} [[electric motor]]. They could reach {{convert|11|kn|lk=in}} on the surface and {{convert|6|kn}} underwater.<ref name=gg9/> On the surface, ''A11'' had a range of {{convert|500|nmi|lk=in}} at {{convert|10|kn}}; submerged the boat had a range of {{convert|30|nmi|lk=in}} at {{convert|5|kn}}.<ref name=a0>Akermann, p. 120</ref>

The boats were armed with two [[British 18 inch torpedo|18-inch (45&nbsp;cm)]] [[torpedo tube]]s in the bow. They could carry a pair of reload torpedoes, but generally did not as doing so that they had to compensate for their weight by removing an equal weight of fuel.<ref>Harrison, Chapter 27</ref>

==Construction and career==
''A11'' was ordered as part of the 1903–04 Naval Programme from [[Vickers]].<ref>Harrison, Chapter 3</ref> She was laid down at their [[shipyard]] in [[Barrow-in-Furness]] in 1903, [[Ship naming and launching|launched]] on 8 March 1905 and completed on 11 July 1905.<ref name=a0/>

On 7 September 1910 ''A11'' collided with a barge when leaving [[HMNB Portsmouth|Portsmouth Harbour]]. The barge was sunk, although her two crew were rescued, and ''A11''{{'}}s bow was slightly damaged.<ref>{{cite magazine|title=Naval Matters—Past and Prospective: Portsmouth Dockyard |journal=The Marine Engineer and Naval Architect |volume=33|date=October 1910|page=98}}</ref> In February 1913, ''A11'' was one of three submarines based at [[Lamlash]] on the Isle of [[Isle of Arran|Arran]] off the west coast of Scotland.<ref>{{cite magazine |title=Fleets and Squadrons in Commission at Home and Abroad: Submarines |magazine=The Navy List |date=March 1913 |page=269d |url= https://digital.nls.uk/british-military-lists/archive/94246554 |accessdate=24 February 2021 |via=National Library of Scotland}}</ref>

==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}}

==External links==
*[http://www.maritimequest.com/warship_directory/great_britain/submarines/pages/a_1902_class/a_11_page_1.htm MaritimeQuest HMS A-11 Pages]

{{A class submarine (1903)}}
{{1910 shipwrecks}}

{{DEFAULTSORT:A11}}
[[Category:A-class submarines (1903)]]
[[Category:World War I submarines of the United Kingdom]]
[[Category:Ships built in Barrow-in-Furness]]
[[Category:Royal Navy ship names]]
[[Category:1905 ships]]
[[Category:Maritime incidents in 1910]]