four Diesel generators located outside each end of the armored citadel for a total capacity of 10,000 kW. Armor The armor scheme of the battlecruisers was quite complex with armor plates of no less than 25 different thicknesses used. Although designed to withstand only cruiser shellfire no less than , or 29% of the total displacement was devoted to armor. The citadel armor was intended to provide an immunity zone against armor-piercing shells at ranges between and . The remainder of the armor was intended to resist high explosive shells and HE bombs. The waterline belt armor was thick and inclined outwards at an angle of 15° to maximize its effectiveness against both plunging and horizontal fire. It had a vertical height of , of which was below the design waterline. It covered approximately 60% of the ship's waterline or about . of armor covered the hull side above the belt as protection from splinters. The forward end of the armored citadel was closed off by a thick transverse bulkhead on the forward end and aft. The deck armor in the citadel ranged in thickness, from for the upper deck, a middle deck—increased to over the handling rooms for the gun turrets—and a lower splinter deck of , which increased outboard to . The waterline forward of the citadel was protected by a splinter belt all the way to the bow, with a similar extension aft to the steering gear compartment. The middle deck behind this splinter belt was thick. The steering gear was protected by of armor on the sides, a deck and a armored bulkhead aft. Additional armored plates were fixed to the third bulkhead of the underwater protection system to protect against diving shells hitting below the level of the waterline belt. Their thicknesses varied depending on location and ranged oddly from amidships to over the 305 mm magazines. The main battery turrets were protected by of armor on the faces, on the sides and on the roofs. Their barbettes had a maximum of on their forward faces and on the after face. Below the main deck they were protected by only of armor. The 130 mm turrets were only protected by of armor as splinter protection. The forward conning tower had a forward face of that thinned down to 225 mm on the aft section with a roof. Its controls and cable runs were protected by