Which 20th century battleship featured artillery with a specially reinforced barrel and steam turbine propulsion?
Built-up gun A built-up gun is artillery with a specially reinforced barrel. An inner tube of metal stretches within its elastic limit under the pressure of confined powder gases to transmit stress to outer cylinders that are under tension. Concentric metal cylinders or wire windings are assembled to minimize the weight required to resist the pressure of powder gases pushing a projectile out of the barrel. Built-up construction was the norm for guns mounted aboard 20th century Dreadnoughts and contemporary railway guns, coastal artillery, and siege guns through World War II.
Canon de 305 mm Modèle 1893/96 gun The Canon de 305 mm Modèle 1893/96 was a heavy naval gun used as the main armament of a number of French pre-dreadnoughts during World War I. It equipped the "Charlemagne", "République" and "Liberté"-class battleships as well as the unique battleships "Iéna" and "Suffren". It was also used as railway artillery in that war.