A 45 mm (1.8 in) torpedo bulkhead ran the length of the hull, several meters behind the main belt. The Panzerschiffe are a special case, as they are not really battleships. Ersatz Yorck, a replacement for the armored cruiser Yorck, was awarded to AG Vulcan in Hamburg on 10 April 1915. The ships were to have electrical power provided by diesel generators. The three ships had originally been ordered as additions to the Mackensen class, but developments abroad, particularly the British Renown-class battlecruisers, led to the navy re-designing the ships. However, the areas of the hull between the torpedo bulkhead and the outer wall of the ship were also used for fuel storage. Muzzle velocity was 805 meters per second (2,640 ft/s).  To shorten the belt length, the amidship magazine found on the Counties was removed (reduced armament required less magazine space anyway).  Though the Ersatz Yorck-class ships were not completed, the design formed the starting point for the work that ultimately produced the Scharnhorst-class battleships built by the Kriegsmarine in the mid-1930s. Today I bring you another upgrade ship. armored cruiser yorck. The guns had a sustained rate of fire of 5 to 7 rounds per minute. The primary change was an increase of the main battery from eight 35-centimeter (14 in) guns to eight 38 cm (15 in) weapons. Intended ammunition stowage for the Ersatz Yorck class was 720 shells or 90 rounds per gun; these were 750-kilogram (1,650 lb) shells that were light for guns of their caliber. They were essentially a reduced version of the preceding County class, scaled down to enable more cruisers to be built from the limited defence budgets of the late 1920s. At a range of 20,000 m (66,000 ft), the armor-piercing shells could penetrate up to 336 mm (13.2 in) of steel plate. This marked a significant increase over the Mackensen design, which displaced 31,000 t (31,000 long tons) as designed; the bulk of the displacement growth was accounted by the heavier main battery, larger, more powerful engines, and additional boilers that provided a speed increase of 1.5 to 2 knots (2.8 to 3.7 km/h; 1.7 to 2.3 mph) over the Mackensens. The crew of the ship was to consist of 47 officers and 1,180 sailors. The three ships had originally been ordered as additions to the Mackensen class, but developments abroad, particularly the British Renown -class battlecruisers, led to the navy re-designing the ships. The Royal Navy had a need for smaller cruisers than the County class, the largest design possible under the Washington limits, in order that more could be built under the strict defence economies of 1920s Britain. The ships were designed to store 850 t (840 long tons) of coal and 250 t (250 long tons) of oil in purpose-designed fuel bunkers. The RMA initially believed the war would be over quickly, but by early 1915, it had become clear that it would not be the case. The turbines were supplied with steam by 24 coal-fired Schulz-Thornycroft single-ended boilers and 8 oil-fired Schulz-Thornycroft double-ended boilers. The main battery gun turrets were also heavily armored: the turret sides were 270 mm (11 in) thick and the roofs were 110 mm (4.3 in). The belt tapered down to 30 mm (1.2 in) at the bow, though the stern was not protected by armor at all. As a result of the magazine changes, and to keep the funnels distant from the bridge, only two funnels were required; the forward boiler room uptakes trunked up into a large fore-funnel. As with the Mackensens, the three ships of the Ersatz Yorck class were never completed. Ersatz Yorck and Ersatz Gneisenau were intended to use Föttinger fluid transmission for their turbines, while Ersatz Scharnhorst's turbines retained direct coupled geared transmissions. The guns had a rate of fire of around one shell every 38 seconds.  The ships would have been supplied with approximately fifteen torpedoes. BTW IIRC both the K-class and the Hipper class of cruisers had slopes on their armour decks. These guns were intended for defense against torpedo boats, and were supplied with a total of 2,240 shells. Displacement rose about 2,500 t (2,500 long tons) compared to the Mackensen class, with about 1,000 t (980 long tons) of that increase being a result of the heavier 38 cm guns. 14 new cruisers. Nevertheless, the work that had gone into the Ersatz Yorck design was not a wasted effort; when the design staff began work on the Scharnhorst-class battleships in the 1930s, they used the plans for Ersatz Yorck as a starting point. The main armored deck ranged in thickness from 30 mm in less important areas, to 80 mm (3.1 in) in the sections that covered the more critical areas of the ship. 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