Editing Trafalgar-class submarine (section)

{{Short description|1983 class of British attack submarines}}
{|{{Infobox ship begin
}}
{{Infobox ship image
| Ship image = File:HMS Trafalgar SSN cropped.JPG
| Ship caption = HMS ''Trafalgar'' in 2008
}}
{{Infobox ship class overview
| Name = 
| Builders = [[Vickers Shipbuilding and Engineering]], [[Barrow-in-Furness]]
| Operators = {{navy|United Kingdom}}
| Class before = {{sclass|Swiftsure|submarine|4}}
| Class after = {{sclass|Astute|submarine|4}}
| Subclasses = 
| Cost = {{ShipCost|GBR|200|m|year=1986|r=0}} per unit
| Built range = 1977–1986
| In service range = 1983–2024
| In commission range = 
| Total ships building = 
| Total ships planned = 
| Total ships completed = 7
| Total ships cancelled = 
| Total ships active = 0
| Total ships laid up =
| Total ships lost = 
| Total ships retired = 7
| Total ships preserved = 
}}
{{Infobox ship characteristics
| Hide header = 
| Header caption = <ref>{{cite web|url=http://www.royalnavy.mod.uk/The-Fleet/Submarines/Fleet-Submarines/Trafalgar-Class|title=Trafalgar Class – Royal Navy|access-date=19 December 2014}}</ref>
| Ship class = 
| Ship type = [[Nuclear marine propulsion|Nuclear-powered]] [[fleet submarine]]s
| Ship displacement = *Surfaced: 4,500 to {{convert|4,800|t|abbr=on}}<ref name="Steve Bush 2014">{{cite book|last=Bush|first=Steve|title=British Warships and Auxiliaries|year=2014|publisher=Maritime Books|page=12 |isbn=978-1904459552}}</ref>
*Submerged: 5,200 to {{convert|5,300|t|abbr=on}}<ref name="Steve Bush 2014"/>
| Ship length = {{convert|85.4|m|ft|abbr=on}}<ref name="Steve Bush 2014"/>
| Ship beam = {{convert|9.8|m|ft|abbr=on}}<ref name="Steve Bush 2014"/>
| Ship height = 
| Ship draught = {{convert|9.5|m|ft|abbr=on}}<ref name="Steve Bush 2014"/>
| Ship power = 
| Ship propulsion = *1 × [[Rolls-Royce PWR|Rolls-Royce PWR1]] nuclear reactor
*2 × [[General Electric Company plc|GEC]] steam turbines
*2 × WH Allen turbo generators; 3.2 MW
*2 × [[Paxman (engines)|Paxman]] diesel generators {{convert|2800|shp|MW|abbr=on}}
*1 × [[Pump-jet|pump jet propulsor]]{{#tag:ref|All boats have a [[Pump-jet|pump jet propulsor]] with the exception of {{HMS|Trafalgar|S107|2}}, which was fitted with a 7-bladed conventional propeller.<ref>Graham, Ian, ''Attack Submarine'',  Gloucester Publishing, Oct 1989,  page 12. {{ISBN|978-0-531-17156-1}}</ref>|group=Note}}
*1 × motor for emergency drive
*1 × auxiliary retractable prop
| Ship speed = Over {{convert|30|kn|km/h|lk=in}}, submerged<ref name="Steve Bush 2014"/>
| Ship range = Unlimited<ref name="Steve Bush 2014"/>
| Ship test depth = 600m
| Ship complement = 130<ref name="Steve Bush 2014"/>
| Ship sensors = 
| Ship EW = *2 × [[Submerged signal ejector|SSE]] Mk8 launchers for Type 2066 and Type 2071 torpedo decoys
*RESM Racal UAP passive intercept
*CESM Outfit CXA
*SAWCS decoys carried from 2002
| Ship armament = 
*5 × 21-inch (533 mm) torpedo tubes with stowage for up to 30 weapons:
** [[Tomahawk (missile)|Tomahawk]] Block IV cruise missiles
** [[Spearfish torpedo|Spearfish]] heavyweight torpedoes


| Ship notes = 
}}
|}

The '''''Trafalgar'' class''' was a class of [[Nuclear marine propulsion|nuclear-powered]] [[fleet submarine]]s (SSNs) in service with the [[Royal Navy]], and the successor to the {{sclass|Swiftsure|submarine|4}}. Like the majority of Royal Navy nuclear submarines, all seven boats were constructed at [[Barrow-in-Furness]] shipyard, [[Cumbria]]. The class made up part of the Royal Navy's nuclear-powered ‘hunter-killer’ submarine force. The ''Trafalgar'' class was replaced by the larger and more capable {{sclass|Astute|submarine|4}}, of which five are commissioned.

The name ''Trafalgar'' refers to the [[Battle of Trafalgar]] fought between the Royal Navy and the combined fleets of France and Spain in 1805.