Editing Duncan-class battleship (section)

===General characteristics and machinery===
[[File:Duncan class diagrams Brasseys 1915.jpg|thumb|left|Right elevation and deck plan as depicted in ''Brassey's Naval Annual 1915'']]

The ''Duncan''-class ships were {{convert|432|ft}} [[length overall|long overall]], with a [[beam (nautical)|beam]] of {{convert|75|ft|6|in|abbr=on}} and a [[draft (hull)|draft]] of {{convert|25|ft|9|in|abbr=on}}. The ''Duncan''-class battleships displaced {{convert|13270|to|13745|LT}} [[normal displacement|normally]] and up to {{convert|14900|to|15200|LT}} [[full load|fully loaded]]. They had two pole masts fitted with [[fighting top]]s; each top carried a [[searchlight]], and four additional searchlights were mounted on the forward and aft [[Bridge (nautical)|bridges]].{{sfn|Lyon & Roberts|p=37}} The ships' hulls were divided with longitudinal bulkheads that should have allowed for counter-flooding to offset underwater damage, but the equipment necessary to quickly flood a compartment was insufficient, as was typical in many British pre-dreadnought designs. The decision to adopt longitudinal bulkheads was made in large part to keep [[secondary stability|reserve stability]] low, since that made the ships more stable gun platforms.{{sfn|Burt|p=236}}

Their crew numbered 720&nbsp;officers and [[Naval rating|ratings]], though this varied over the course of their careers; in 1904, ''Russell'' had a crew of 736, and while serving as a [[flagship]] that same year, ''Exmouth'' had a crew of 762. During the [[First World War]] in 1915, ''Russell''{{'}}s crew had grown to 781. The ships were fitted with Type 1 [[wireless telegraphy]] sets, with the exception of ''Exmouth'', which received Type 2 sets. The remainder of the class had their Type 1s replaced with Type 2 sets later in their career, except for ''Montagu'', which had already been wrecked by that time. ''Cornwallis'' and ''Russell'' eventually received Type 3 wireless transmitters. The ships carried a number of small boats that varied over the course of their careers, including a variety of steam and sail [[Pinnace (ship's boat)|pinnaces]], steam [[Launch (boat)|launches]], [[Cutter (boat)|cutters]], [[whaler]]s, [[Captain's gig|gigs]], [[dinghy|dinghies]], and [[raft]]s.{{sfn|Lyon & Roberts|p=37}}{{sfn|Burt|pp=232–233}}

The ''Duncan''-class ships were powered by a pair of 4-cylinder [[triple-expansion engine]]s that drove two inward-turning, four-bladed [[propeller|screws]]. Steam was provided by twenty-four [[Belleville boiler]]s. The boilers were divided into four [[fire room|boiler rooms]], two of which contained eight boilers each and the other two with four boilers per room; they were trunked into two closely spaced [[funnel (ship)|funnels]] located [[amidships]]. The ''Duncan''-class ships had a top speed of {{convert|19|kn}} from {{convert|18000|ihp|lk=in}}, though on speed trials their maximum speed ranged from {{convert|18.6|to|19.4|kn}}, with power slightly exceeding the design figure.{{sfn|Lyon & Roberts|p=37}}{{sfn|Burt|p=236}} At a cruising speed of {{convert|10|kn}}, the ship could steam for {{convert|6070|nmi|lk=in}}.{{sfn|Burt|p=232}}