Blake-class
Edgar-class
Powerful-class
Displacement 7.790 tons and as dimensions 109,73 (between perpendiculars)-118,11 (over all) x 18.29 x 7,24 metres or 360-387.6 x 60 x 23.9” feet. Coal-fired machinery consisted of 2-3cylinder vertical triple expansion steam engines and 4 boilers supplying 12.000 ihp allowing a speed of 20 knots and with a speed of 10 knots a range 10.000 nautical miles. Crew numbered 544 men. Armour consisted of a 7,6cm/3”-12,7cm/5” deck with the casemate protected by 15,2cm/6” thick armour and the main guns by 7,6cm/3” thick shields and the conning tower by 25,4cm/10”. Armament consisted of 2x1-23,37cm/9.2” inch breech loading Mk VI guns, 10x1-5,24cm/6” quick firing guns, 12x1-6pd guns, 4x1-3pd guns and 4-45,72cm/18“ torpedo tubes.