class armoured frigates built royal_navy 1860s different armour scheme heavier armament sister ships generally regarded half sister ships class ship spent career channel_fleet occasionally served flagship northumberland placed reserve training ship converted coal hulk sold ship scrapped design description class armoured frigates essentially enlarged versions ironclad heavier armament armour powerful engines retained broadside ironclad layout predecessor sides fully armoured protect guns designed carry shaped ram prominent northumberland feet inches long perpendiculars beam feet inches draught feet inches ship displaced long tons tons hull subdivided watertight transverse bulkheads double underneath engine boiler rooms ship considered steady gun platform able maintain speed satisfactory manoeuvre authorized crew officers enlisted men actually carried men propulsion northumberland cylinder trunk steam engine sons driving single propeller steam provided rectangular fire tube boilers produced total indicated horsepower ship sea trials september northumberland maximum speed knots mph ships normally carried long tons coal maximum capacity long tons steam nautical miles knots mph originally designed masts northumberland fitted masts refit removed rigged barque northumberland knots mph sail mainly ship propeller disconnected hoisted stern ship reduce drag worst speed ironclad era admiral described class ships performers canvas fleet day ships carried dress little purpose armament unlike half sisters northumberland armed mix seven inch inch inch rifled muzzle loading guns inch inch mounted main deck inch guns fitted upper deck chase guns seven inch guns mounted stern main deck chase guns inch gun credited ability penetrate inches wrought iron armour muzzle inch gun penetrate inch armour seven inch gun penetrate inches northumberland partially rearmed armament inch guns main deck forward chase guns rear chase gun inch guns replaced seven main deck stern inch guns remained inches breech loading guns replaced inch guns quick firing inch guns pounder hotchkiss guns machine guns later added armour unlike half sisters entire northumberland hull covered wrought iron armour compensate additional weight armament battery protected main deck ship fitted complete waterline armour belt tapered inches ends inches amidships armour extended feet inches waterline sides battery feet long protected inch armour sides including transverse bulkheads fore aft guns forward chase guns upper deck protected armoured bulkheads stern chase guns deck entirely unprotected armour backed inches teak ship conning tower protected inch armour plates construction service northumberland named ceremonial county ordered september laid october shipyard london altered building slip sir succeeded chief unlike half sisters ship spent years stocks ready launched partially frequent changes design northumberland closer completion additional weight caused stick hour slid halfway stern supported air threatening ship efforts hydraulic failed water spring tide failed use april proved successful builders went bankruptcy ship launched seized northumberland company asset water months passed admiralty possession begin fitting ship commissioned october completed october cost total ship posting channel_fleet remained captain yards painted black visually distinguished half sisters yards white time helped half sister tow floating drydock picked warrior taken bermuda ships departed june loaded long tons coal bags gun decks transferred floating dock days later uneventful voyage anchored christmas day storm parted anchor chain ship drifted ram bow ironclad hercules northumberland seriously damaged waterline compartment flooded able steam malta repairs half sister normally flagship channel_fleet normally flagship fleet second command replaced flagship northumberland flagship second command return duty served flagship lord northumberland received refit rejoined channel_fleet completion ship paid refit flagship vice sir successive commanders channel_fleet completion northumberland assigned devonport training ship renamed ship served coal hulk renamed ship sold renamed service scrapped relics large 1870s half scale models ship
HMS Northumberland (1866)