 The Royal Sovereign @-@ class battleships were based on Admiral @-@ class barbette ships , but contained several alterations . The freeboard was raised , the barbettes ' armour was extended and an upper belt and secondary armour were added . They could also obtain a higher speed , but were 4 @,@ 000 tonnes larger . Resolution was 410 feet ( 120 m ) long overall and had a beam of 75ft and a draft of 27ft 6in . She displaced up to 15 @,@ 580 tonnes at her full combat load . Her propulsion system consisted of two 3 @-@ cylinder triple expansion engines powered by eight coal @-@ fired cylindrical boilers . With natural draught , her engines provided a top speed of 15 @.@ 5 knots at 9 @,@ 000 indicated horsepower ; 16 @.@ 5 knots at 11 @,@ 000 indicated horsepower could be obtained with forced draught . She had a maximum complement of 712 officers and enlisted men , although her crew in 1903 amounted to 672 people . When built , ships of the Royal Sovereign class rolled too heavily under certain conditions . Bilge keels were added to compensate for the problem , and the ships " proved to be excellent seaboats quite capable ... of maintaining high speeds in a seaway " . The ships were well @-@ constructed and probably the most substantial built for the Royal Navy , even if they " suffered ... from excessive weight and fittings . " In the view of the maritime historian R. A. Burt , they were " highly successful ; at that time , they were probably unequalled in all @-@ round fighting efficiency . " 
