The ships of the Wittelsbach class were the first battleships built under the first Naval Law of 1898, and they were designed by Prof. Dr. Dietrich, then the chief constructor. The ships represented an incremental improvement over the preceding Kaiser Friedrich III class. Although Konteradmiral (Rear Admiral) Emil Felix von Bendemann had argued for an increase in the main battery from the 24-centimeter (9.4 in) guns of the Kaiser Friedrich III class to more powerful 28 cm (11 in) guns, the Wittelsbach-class ships were equipped with the same armament of 24 cm guns, but were given an additional torpedo tube. They also had improved defensive capabilities, as they were protected by a more extensive armored belt. Additionally, they received more powerful engines and were slightly faster. They also differed from the preceding ships in their main deck, the entire length of which was flush; in the Kaiser Friedrich III-class ships, the quarterdeck was cut down.
General characteristics and machinery
Line-drawing of the Wittelsbach
The ships of the Wittlesbach class were 125.2 meters (410 ft 9 in) long at the waterline and 126.8 m (416 ft 0 in) overall. They had a beam of 22.8 m (74 ft 10 in) and a draft of 7.95 m (26 ft 1 in) forward. The Wittelsbachs were designed to displace 11,774 metric tons (11,588 long tons) with a standard load, and displaced up to 12,798 metric tons (12,596 long tons) at full combat weight. The Wittelsbach-class ships' hulls were built with transverse and longitudinal steel frames. Steel hull plates were riveted to the structure created by the frames. The hull was split into 14 watertight compartments and included a double bottom that ran for 70 percent of the length of the ship.
The ships were regarded in the German Navy as excellent sea boats with an easy roll; the ships rolled up to 30° with a period of 10 seconds. They maneuvered easily; at hard rudder the ships lost up to 60 percent speed and heeled over 9°. However, they suffered from severe vibration, particularly at the stern, at high speeds. They also had very wet bows, even in moderate seas. The ships had a crew of 33 officers and 650 enlisted men. However, when serving as a squadron flagship, the crew was augmented by an additional 13 officers and 66 enlisted men. While acting as a second command ship, 9 officers and 44 enlisted men were added to the standard crew. Wittelsbach and her sisters carried a number of smaller vessels, including two picket boats, two launches, one pinnace, two cutters, two yawls, and two dinghies.
The five ships of the Wittelsbach class each had three three-cylinder triple expansion steam engines. The outer engines drove a three-bladed screw that was 4.8 m (15 ft 9 in) in diameter; the central shaft drove a four-bladed screw that was slightly smaller, at 4.5 m (14 ft 9 in) in diameter. To produce steam to power the engines, each ship had six marine-type boilers, with the exception of Wettin and Mecklenburg, which had six Thornycroft boilers, along with six transverse cylindrical boilers. Steering was controlled by a single large rudder. Electrical power was supplied by four generators that each produced 230 kilowatts (310 hp) at 74 volts, although in Wittelsbach the generators were rated at 248 kilowatts (333 hp).
The propulsion system was rated at 14,000 metric horsepower (13,808 ihp; 10,297 kW), which produced a top speed of 18 knots (33 km/h; 21 mph). On trials, however, the five ships had significantly varied performances. Schwaben, the slowest ship, reached 13,253 PS (13,072 ihp; 9,748 kW) for a top speed of only 16.9 knots (31.3 km/h; 19.4 mph). Wettin, the fastest, managed 15,530 PS (15,318 ihp; 11,422 kW) and a top speed of 18.1 knots (33.5 km/h; 20.8 mph). They carried 650 metric tons (640 long tons) in their holds, but fuel capacity could be nearly tripled to 1,800 metric tons (1,772 long tons) with the usage of additional spaces in the ships. This provided a maximum range of 5,000 nautical miles (9,260 km; 5,754 mi) at a cruising speed of 10 knots (19 km/h; 12 mph).
Armament and armor
Lithograph of Mecklenburg
The ships' armament was nearly identical to the preceding Kaiser Friedrich III class. The primary armament consisted of a battery of four 24 cm (9.4 in) SK L/40 guns in twin gun turrets,[a] one fore and one aft of the central superstructure. The guns were mounted in Drh.L. C/98 turrets, which allowed elevation to 30° and depression to −5°. At maximum elevation, the guns could hit targets out to 16,900 meters (18,500 yd). The guns fired 140-kilogram (310 lb) shells at a muzzle velocity of 835 meters per second (2,740 ft/s). Each gun was supplied with 85 shells, for a total of 340. The turrets were hydraulically operated Secondary armament included eighteen 15 cm (5.9 inch) SK L/40 guns; four were emplaced in single turrets amidships and the rest were mounted in MPL casemates.[b] These guns fired armor-piercing shells at a rate of 4–5 per minute. The ships carried 120 shells per gun, for a total of 2,160 rounds total. The guns could depress to −7 degrees and elevate to 20 degrees, for a maximum range of 13,700 m (14,990 yd). The shells weighed 51-kilogram (112 lb) and were fired at a muzzle velocity of 735 meters per second (2,410 ft/s). The guns were manually elevated and trained.
The ships also carried twelve 8.8 cm (3.45 in) SK L/30 quick-firing guns, also mounted in casemates and pivot mounts. These guns were supplied with between 170 and 250 shells per gun. These guns fired 7.04 kg (15.5 lb) at a muzzle velocity of 590 mps (1,936 fps). Their rate of fire was approximately 15 shells per minute; the guns could engage targets out to 6,890 m (7,530 yd). The gun mounts were manually operated. The ships' gun armament was rounded out by twelve machine cannons. The ships were also armed with six 45 cm (17.7 in) torpedo tubes, all submerged in the hull; one was in the bow, another in the stern, and two on each broadside. These weapons were 5.1 m (201 in) long and carried an 87.5 kg (193 lb) TNT warhead. They could be set at two speeds for different ranges. At 26 knots (48 km/h; 30 mph), the torpedoes had a range of 800 m (870 yd). At an increased speed of 32 knots (59 km/h; 37 mph), the range was reduced to 500 m (550 yb).
The five Wittelsbach class battleships were armored with Krupp steel. Their armored decks were 50 millimeters (2.0 in) thick, with sloped sides that ranged in thickness from 75 to 120 mm (3.0 to 4.7 in). The sloped section of the deck connected it to the main armored belt, which was 225 mm (8.9 in) in the central citadel, where the ship's vitals were. This included ammunition magazines and the propulsion system. The belt was reduced to 100 mm (3.9 in) on either end of the central citadel; the bow and stern were not protected with any armor. The entire length of belt was backed by 100 mm of teak planking. Directly above the main belt, the 15 cm casemate guns were protected with 140 mm (5.5 in) thick steel plating. The 15 cm guns in turrets were more exposed and therefore slightly better protected: their side armor was increased to 150 mm (5.9 in), with 70 mm (2.8 in) thick gun shields. The 24 cm gun turrets had the heaviest armor aboard ship: 250 mm (9.8 in) thick sides and 50 mm thick roofs. The forward conning tower also had 250 mm thick sides, though its roof was only 30 mm (1.2 in) thick. The rear conning tower was much less protected. Its sides were only 140 mm thick; the roof was 30 mm thick.