sentences:  An armored hood with curved sides above the barbette protected the guns and crews, but the shape of the hood necessitated large openings through which to raise and depress the guns, which proved to be a liability since enemy shells could enter through them, as happened to "Barbaros Hayreddin" (ex-"Kurfürst Friedrich Wilhelm") in 1913.The 35-caliber guns had a muzzle velocity of , while the longer guns had a velocity of ; the differing velocities produced different ballistics, but the designers were not concerned with the problem, owing to the short ranges at which the ships were expected to fight and the primitive state of fire control in the 1880s.Propellant charges consisted of brown powder.