Editing Warrior-class ironclad (section)

===Propulsion===
[[File:HMS Warrior trunk engine.jpg|thumb|left|Close-up of the ship's trunk steam engine]]
The ''Warrior''-class ships had one 2-cylinder [[Trunk engine|trunk steam engine]] made by [[John Penn (engineer)|John Penn and Sons]] driving a single {{convert|24|ft|6|in|m|1|adj=on}} propeller.<ref>Ballard, p. 246</ref> Ten rectangular [[boiler (steam generator)|boiler]]s<ref>Roberts, p. 7</ref> provided steam to the engine at a working pressure of {{convert|20|psi|kPa kg/cm2|0|abbr=on|lk=on}}. The engine produced a total of {{convert|5267|ihp|lk=on}}<ref>Ballard, pp. 246–247</ref> and was the most powerful thus far built for a warship.<ref name=p19>Parkes, p. 19</ref> On [[sea trial]]s in October 1861 ''Warrior'' had a maximum speed around {{convert|14.3|kn|lk=in}}; ''Black Prince'' was about a half knot slower. The ships carried {{convert|800|LT|t}} of coal, enough to steam {{convert|2100|nmi|lk=in}} at {{convert|11|knots}}.<ref name=p01>Parkes, pp. 20–21</ref>

The ironclads were [[ship rig]]ged and had a sail area of {{convert|48400|sqft|sqm|0}}. The lower masts were made of wood, but the other masts were iron. ''Warrior'' made {{convert|13|kn}} under sail, but ''Black Prince'' could only do {{convert|11|kn}}. Under both sail and steam ''Warrior'' once logged {{convert|17.5|kn}}. Both funnels were semi-retractable to reduce wind resistance while under sail alone. The ships' propellers could be hoisted up into the stern of the ship to reduce drag while under sail. They were the largest hoistable propellers ever made and required about 600 men to be raised.<ref name=p01/>