Bismarcks Big Guns |
Specifications |
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Bismarck's and Tirpitz's main battery consisted of eight 38 cm (15 in) SK C/34 guns in four twin turrets, Anton and Bruno in a superfiring pair forward of the superstructure and Caesar and Dora aft. The turrets allowed elevation to 30°, which gave the guns a maximum range of 36,520 m (39,940 yd). The guns fired 800 kg (1,800 lb) projectiles at a muzzle velocity of 820 meters per second (2,690 ft/s). The main battery was supplied with between 940 and 960 shells total, for approximately 115–120 shells per gun. As with other German large-caliber naval rifles, these guns were designed by Krupp and featured sliding wedge breech blocks, which required brass cartridge cases for the propellant charges. Under optimal conditions, the rate of fire was one shot every 18 seconds, or three per minute. The gun turrets were electrically trained and the guns were hydraulically elevated. Gun elevation was controlled remotely. The turrets required each gun to return to 2.5° elevation for loading. Tirpitz was eventually provided with time-fuzed shells to combat the repeated Allied bombing attacks.
The Bismarcks' use of four twin turrets (the 4 × 2 configuration) was a design practice that hearkened back to the First World War. Almost all other post-1921 capital ships had triple or even quadruple turrets, which allowed for additional heavy caliber guns, while reducing the number of turrets. Fewer turrets reduced the length of the battleship's armored citadel (particularly magazine length and the armor needed to protect it) and shortened the vessel itself. Although triple turrets were considered for the Bismarcks, there were concerns that the extra barrel would lower the overall rate of fire in each turret, along with fears that a single well-aimed hit could disable a larger proportion of the ship's firepower. It was also felt that four twin turrets allowed for a better field of fire and a more effective sequence of salvos. |
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