Editing Resolution-class submarine (section)

==Construction==
Two pairs of the boats were ordered in May 1963 from Vickers Shipbuilding Ltd, [[Barrow in Furness]] and from Cammell Laird and Co. Ltd, [[Birkenhead]]. The option of buying a fifth unit, planned as {{HMS|Ramillies||2}},{{ref label|reference name_A|a|}}  was cancelled in February 1965 as a cost-savings measure by the government of [[Prime Minister]] [[Harold Wilson]].{{sfn|Gardiner|1995|p=531}}{{sfn|Roberts|2009|p=104}} Traditional [[battleship]] names were used, signifying that they were the [[capital ship]]s of their time.

[[Vickers Shipbuilding and Engineering Ltd|Vickers Armstrong]] in [[Barrow-in-Furness]] constructed ''Resolution'' and ''Repulse'' and [[Cammell Laird]] in [[Birkenhead]] constructed ''Renown'' and ''Revenge''. The construction was unusual in that the bow and stern were constructed separately before being assembled together with the American-designed missile compartment.

The design was a modification of the {{sclass|Valiant|submarine|0}} fleet submarine, but greatly extended to incorporate the missile compartment between the fin and the nuclear reactor. The length was {{convert|130|m|ft}}, breadth {{convert|10.1|m|ft}}, height {{convert|9|m|ft}} and the displacement {{convert|8400|LT|t}} submerged and {{convert|7600|LT|t}} surfaced. A [[Rolls-Royce plc|Rolls-Royce]] pressurised water reactor ([[PWR1]]) and [[English Electric Company]] turbines gave them a speed of {{convert|25|kn|km/h}} and they could dive to depths of {{convert|275|m}}. Sixteen Polaris A3 missiles were carried, in two rows of eight. For emergencies there was a diesel generator and six {{convert|21|in|mm|order=flip|adj=on|0}} [[torpedo tube]]s located at the bow, firing the [[Tigerfish torpedo|Tigerfish wire-guided homing torpedoes]]. The submarines put to sea with a crew of 143.

According to former head of the [[Royal Corps of Naval Constructors]] R.J. Daniel, the ''Resolution''-class SSBNs possessed five features that were envied by the [[United States Navy]]: the machinery loading hatch, automated hovering system, welded hull valves, standardised valves, and raft-mounted propulsion machinery.{{sfn|Daniels|2004|p=192}}