class ironclad class pair ironclad warships built italian regia marina royal_navy 1860s 1870s class comprised ships broadside ironclad armed inch inch guns converted central battery ship construction armed powerful battery eighteen inch guns ship career large rapid shift withdrawn service auxiliary duties respectively stricken naval register broken scrap following year having badly damaged fire design class designed initially planned build ships broadside ironclads time navies begun build central battery ships concentrated smaller number guns armored limited capability end fire change allowed ship shorter turn required armor ship result designed second ship class central battery ironclad construction general characteristics machinery ships class wooden hulls incorporate iron construction ships varied slightly dimensions result having converted central battery ship construction meters long perpendiculars beam average draft perpendiculars beam draft displaced metric tons long tons short tons normally displaced long tons short tons ships displaced long tons short tons load ships crew officers men ships propulsion system consisted single expansion steam engine drove single screw propeller steam supplied coal fired cylindrical fire tube boilers boilers single funnel amidships engines produced speed knots mph indicated horsepower steam nautical miles speed knots mph ships fitted barque rig supplement steam engine long distance cruising ship square feet sail area armament armor broadside ironclad armed main battery guns guns completed central battery ship battery eighteen guns placed armored ships armament revised careers ships batteries replaced guns carried guns years later armament reduced guns converted training ship equipped guns guns ships protected wrought iron belt armor thick extended entire length hull waterline wrought iron protecting guns ships service history ships completed late action italian war independence uneventful careers time entered service having superseded advanced central battery ships modified construction central battery ship changes necessitated lengthy delays ironically time completed italian navy moved advanced turret ships like class mobilized franco prussian war italy took advantage french defeat seize rome rest fleet attack port fleet unable assemble sufficient forces operation took naval demonstration attempt force ottoman_empire comply terms treaty berlin turn town montenegro following year involved collision ironclad ship damaged year converted torpedo training ship remained service guard ship ships stricken naval register broken scrap following year converted depot ship july set fire lightning strike badly burned damage proved economical repair broken scrap
Roma-class ironclad