class battleship class proposed type battleship planned french_navy construction scheduled begin class comprised ships named cities france rest honored french design improvement previous class mounted fourth quadruple gun turret total sixteen guns construction cancelled outbreak world war august ships laid design starting french_navy began dreadnought battleship construction program starting ships class year ship class authorized year class battleships followed design work began design staff submitted proposals new battleships ranged metric tons long tons short tons long tons short tons designs featured main battery fourteen sixteen guns guns guns mix quadruple twin gun turrets navy authorized fourth class battleships scheduled design staff determined gun long design proposals incorporated weapons cancelled design staff settled proposals proposal mounted fourteen guns long tons short tons ship meters long november design staff instead chose slightly larger second design armed sixteen guns quadruple turrets ships scheduled ordered january followed april world war broke august shifting military requirements particularly army forced cancellation class ships characteristics ships long perpendiculars long overall beam draft load displacement estimated long tons short tons propulsion system settled time class cancelled design staff proposed mixed steam turbine triple expansion engine system ships preceding class turbine system ship previous class considered new geared turbines proved satisfactory new destroyer final design called propulsion system rated shaft horsepower speed knots mph unknown number boilers funnels amidships sixteen modèle guns mounted quadruple turrets comprised main battery turrets equipped electric hydraulic training elevation gear mounted centerline arrangement clear according conway world fighting ships turret placed forward amidships superfiring pair aft contemporary suggests turrets mounted superfiring pairs forward aft turrets weighed long tons short tons electrically trained elevated guns divided pairs mounted twin thick bulkhead divided turrets pair guns ammunition magazine fired simultaneously independently guns range rate fire rounds minute shells kilogram armor piercing rounds fired muzzle velocity meters second secondary battery consist guns modèle new automatic model singly mounted casemates hull guns fired shell muzzle velocity ships equipped unknown number anti aircraft guns torpedo tubes unknown size submerged hull ships protected variation armor layout previous class primary alterations slightly thinner armor upper deck plating compensate improved armor waterline
Lyon-class battleship