lead ship class monitors built royal_navy 1870s ships ordered satisfy demands local defence war scare pace construction slowed perceived threat war declined ship spent career reserve sustained period commission months russo turkish war british trying force russians end war allowing seize constantinople sold scrap design description class ships modified versions class ships length perpendiculars feet beam feet draught feet inches deep load displaced long tons crew consisted officers men ships cylinder inverted compound steam engines driving single propeller shaft engines produced total indicated horsepower december ship sea trials gave maximum speed knots mph carried long tons coal steam nautical miles knots mph ships mounted inch rifled muzzle loading guns twin gun turrets fore aft superstructure guns fire solid shot explosive shells mounted carriages hydraulic elevate guns class complete waterline belt wrought iron inches thick amidships inches ends superstructure conning tower fully armoured reason called inches wrought iron gun turrets inches faces inches sides rear vertical armour backed inches teak decks inches thick construction laid september london launched july commissioned january ship towed month proved lengthy fitting period completed cost build refit recommendation ships construction extend superstructure sides ship improve stability acted refitted 1880s refit strengthened upper decks added watertight bulkhead false keel quick firing pounder hotchkiss guns added torpedo boat defence machine guns increased crew approximately men added long tons displacement service ship completed lead ship class placed 1st class reserve completion ship sisters commissioned april august russo turkish war service admiral sir portland harbour paid chatham august refitted ships class participated annual fleet times like sisters placed non effective list january transferred sold july
HMS Cyclops (1871)