Since this class of giant ships equipped with 12 400mm main guns will be the absolute main force of the German Navy to be better than the King's level in the next 30 years, when designing protection, Qingying obviously had to take into account as much future combat needs as possible. Considering the gap between the current armor material and the product in 20 years later, Qingying arranged a main armor belt of 350 mm thick and 20 degrees inward for the Bavarian class; when the warring sides have a certain heading angle, the defense ability of this armor is sufficient to ensure the internal collapse of this armor. In order to prevent the main armor from falling internally caused by the shells by the shells, there is also a 16mm anti-collapse back plate behind it; when the main armor is distorted due to the collision kinetic energy and surface explosion of the incoming shells, this back plate can absorb the internal deformation of the armor well.

Qingying also took great pains to defend against water bombs: after all, the probability of such a fatal blow is definitely not low, and this level must be used until the large ships decades later, and obviously, it cannot only pursue short-term benefits like the early cannon fodder ships. After some thought, Qingying, standing on the shoulders of the giants, once again made a complete armor layout.

Below the 4.5-meter-high main armor, a piece of hardened armor with a thickness of up to 1.8 meters and thinning from 350 mm to 245 mm, firmly fits with the main armor at the same 20-degree inclination: as a continuation of the main armor belt extending to the underwater part, it can obtain equal defense power with the assistance of "sea water armor". Further down, there are two underwater TDS next doors that lead to the bottom of the ship: on the outside is a vertically downward 60 mm high bullet

The uniform steel is supplemented by a lightning protection depth of 4.2 meters and a three-layer layout of air-liquid-air, and has the ability to withstand underwater blasting of 400kg equivalent TNT. The inner layer is a gradient armor from 120 mm to 20 mm arranged at a 20-degree inclination angle. As the last layer of safety for protecting the core compartment: when a large-power torpedo and powerful water bombs break the outer layer of 60 mm TDS. This layer of internal armor can ensure that the incoming water and shells are isolated outside the core compartment.

In order to cope with the increasing combat distance and resist the threat of bombs from the air in the future, the horizontal protection of the Bavarian-class has also been strengthened. Its main horizontal armor is as thick as 150 mm, and 18 mm of structural steel is closely attached to the bottom for anti-collapse. Even after thirty years, this horizontal armor can also prevent most attacks; if the situation requires it, the ship can also thicken the level after large-scale modification.

After achieving strong offense and defense, Qingying turned its attention to speed and endurance - prioritizing firepower and protection, which has always been the orthodox bb design idea that Qingying has never been easier. However, due to offense and defense, the total tonnage of the new warship has begun to grow uncontrollably. If traditional power like the king-level is arranged, the displacement of the warship will inevitably exceed the current risk limit that the German shipbuilding industry can bear. In order to change this situation, Qingying made drastic innovations in the power system of the new ship, and for the first time, it used oil-fired boilers to the main ships on a large scale.

As a power machinery that has been announced since the 1890s, the oil-fired boiler, which has been developed for more than 20 years, is no longer considered a new equipment among the navies of various countries: compared with traditional coal-fired boilers, the oil-fired boiler is in all the leading weight, thermal efficiency, land area, and even cost. Therefore, the navies of various countries have brought it to their own warships: from the initial torpedo boats with experimental nature to the current first-class battleships, they have used heavy oil as the main source of power.

The German Navy's use of this superior equipment is much short of its use than its American and British counterparts: the reason is that Germany does not have enough oil sources. Although the German Navy's main ship boiler was converted to kerosene mixed combustion, this is still the main form of coal-fired boiler. Improvements in areas such as weight and footprint are still very limited. From the perspective of war, the German Navy should use coal as the main driving force of the warship when there is no sufficient oil source: However, after careful weighing, Qingying gritted his teeth to equip the new battleship with the latest heavy oil specialized boiler. Because in the field that Qingying currently needs to solve urgently, the advantages of oil-fired boilers over coal-fired boilers are too great.

It is worth noting that the weight of the power system itself is not much different from that of coal or oil. Currently, the coal-fired power used by Germany on the main ship can reach 25 horsepower per ton, and the fuel power is at most 33 horsepower per ton; this means that even for a warship with a power output of up to 100,000 horsepower, the battleship using an oil-fired boiler can achieve a weight saving of 1,000 tons in power itself. In fact, the real point of fuel power is the significant reduction of the required area of ​​the boiler cabin.

Unlike the pulverized coal boilers in later power plants, the current ship-purpose coal-fired boilers are piled on the grate to burn. This two-dimensional combustion method makes the output of the boiler directly linked to the area. Even with the current German power technology that is far better than the UK, the rated output of the coal-fired boiler cabin on its main ship can only reach 75 horsepower per square meter (in fact, the boiler does not generate power, and here is only an image diagram). If you want to use coal-fired power to achieve an output of 100,000 horsepower, it means that it needs at least 1,300 square meters of core cabin space: calculated based on the 20-meter width of the internal core cabin of the main ship, the boiler cabin alone will occupy 65 meters long!

The oil-fired boiler is completely different. Because the combustion method of this boiler is to spray heavy oil down from the top and burn it completely before it falls to the bottom; this three-dimensional combustion method undoubtedly makes the boiler unit occupy a unit of land and a qualitative leap compared to the coal-fired boiler with simple plane combustion. Even the German main ship oil-fired boiler with a height of only 3 floor cabins, the power it can generate can easily reach 150 horsepower per square meter; and if the height of the boiler cabin is raised to the 4 floor cabin, this number can even exceed 200 horsepower per square meter! This means that under the same power output, the core cabin length of the oil-fired boiler needs to occupy is only 37% to 50% of the coal-fired boiler; this greatly reduced armor weight brought by reducing the length of the core cabin is the core secret that fuel power can truly control the tonnage of the warship!

"Although the main boiler cabin of this class of battleships is only 410 square meters, less than half of the previous king-level, please rest assured that it has a surging core that is better than the latter. Due to the armored box design, its boiler cabin height reaches 10 meters without any pressure; and under the rated output, 12 heavy oil specialized boilers can provide it with an output power of 85,000 horsepower." On the flat and high and wide viewing platform

Qing Yingman proudly said to Tirpitz beside him, "In order to reduce service costs, I also arranged two coal-fired boilers in the middle of two sets of high-pressure steam turbines to provide the power for warship cruise and daily mechanical operations. When all 14 boilers are put into operation, its four sets of steam turbines will have a maximum output of 91,500 horsepower, which is enough to make the ship's actual speed higher than the 25 knots of Kings."

Tirpitz nodded slightly, and his eyes were filled with intoxication when he looked at the giant ship below. The epic and dreamy firepower, indestructible thick armor, and excellent speed, the three elements of the warship once again achieved a perfect unity under the cheating of the young man next to him. Even in terms of navigation and endurance that the German Navy had not paid much attention to before, this class of warships was more than their predecessors.

We have made a big leap. Its bow freeboard has a high of 9.3 meters with a regular displacement and a main body of the entire unit is 6.5 meters. Its wind and wave resistance is absolutely superior in the horizontal comparison of peers from all countries. With a full load displacement of 3,700 tons of heavy oil and 600 tons of coal, its endurance is as high as 9,400 nautical miles/12 knots, which can achieve long-distance travel from Wilhelmshaven to Germany and East Africa.

"If His Highness had not decisively adopted heavy oil as the main power of the warship and thus reduced the length of the core compartment to 119 meters; even if the width of the water was reduced as before, we would never have completed this class of warships with a standard displacement of 37,000 tons. Once its tonnage exceeds the 35,000 tons limit of the Washington Navy Treaty, even if the caliber of the main gun is only 400 mm due to the metric system, it would be difficult to

To escape the fate of being demolished like the British Hood class." Tirpitz whispered, his words full of admiration and gratitude. "In the next 20 years, I am afraid that all countries will no longer be able to build a battleship that can match it. Originally, I was still regretting the imminent scrapping of the Nassau class and the Helgolan class. Now it seems that they are freeing up tonnage for these four Bavarian classes, which is the best way to fulfill their mission."

While talking, the crowd below suddenly burst into a trembling cheer that echoed through the sky; Qingying turned around and saw that the emperor William, dressed in gorgeous clothes, had appeared on the viewing platform, waving to the black subjects below. Qingying and Tirpitz also stood up and saluted slightly to show their respect and awe of the Hohenzollern imperial power. Next to William, a middle-aged man with a kind face was staring at the huge steel hull below with a marvel and excitement. As if he felt Qingying's gaze, he turned his head and smiled at Qingying. His movements and demeanor all showed the calmness and grace of a thousand-year-old royal family.

"Dear Franz Ferdinand, we have been missing for many years." Qingying walked forward with a smile, holding the middle-aged man's hand tightly. (To be continued, please search for Astronomy, the novel is better, updated and faster!

ps: Thanks to book friend Hai Chaoer for his monthly ticket support and Shaojiang and Zhouyu1976 rewards~~~
Chapter completed!