french ironclad french ironclad wooden armored corvette built french_navy late 1860s named greek sea goddess franco prussian war assigned squadron french ships attempted blockade prussian ports baltic_sea accidentally rammed sister route pacific propeller fell return france sail eventually design description alma class ironclads designed improved versions armored corvette suitable foreign deployments unlike predecessor alma class ships true central battery ironclads fitted armored transverse bulkheads like ironclads era equipped metal reinforced ram measured meters perpendiculars beam meters mean draft meters displaced metric tons long tons crew numbered officers men propulsion ship single horizontal return connecting rod steam engine driving single propeller engine powered oval boilers sea trials engine produced indicated horsepower ship reached knots mph unlike sisters arc funnels mounted carried metric tons long tons coal allowed ship steam nautical miles speed knots mph barque rigged sail area square meters armament mounted millimeter modèle breech loading guns central battery battery deck millimeter guns mounted barbettes upper deck sides ship millimeter guns mounted upper deck exchanged guns guns armor piercing shell caliber gun weighed pounds gun weighed long tons gun fired shell muzzle velocity credited ability penetrate nominal inches wrought iron armour muzzle guns fire solid shot explosive shells armor complete millimeter wrought iron waterline belt approximately meters high sides battery armored millimeters wrought iron ends battery closed bulkheads thickness barbette armor millimeters thick backed millimeters wood portions sides protected millimeter iron plates service named greek sea goddess laid toulon launched august ship began sea trials reserve brest following year commissioned july franco prussian war assigned july departed company rest cruised danish port july august entered baltic_sea squadron renamed remained baltic attempting blockade prussian ports baltic ordered return september ship assigned detached following year revolution sister spent september october port spain protect french citizens temporary flagship vice admiral october armored frigate caught fire exploded toulon paid march recommissioned april service july accidentally rammed run ashore prevent sinking ship reserve intended flagship sister sent instead october commissioned flagship sailed pacific lost propeller return sail admiral transferred flag ended days hulk
French ironclad Thétis