PS: Thank you for the reward of the book friend "Chen Liangyou 1", and continue to ask for recommendation votes ^_^

Although because of the relatively large thickness, the increase in the armor of the warship can not be compared with the tank, but the Nanchang-class heavy cruiser also benefited a lot from it, considering that the thicker the double-sided hardened armor, the worse the increase, and the Nanchang class is only a heavy patrol after all, so Hu Weidong decided to further reduce the armor thickness of the Nanchang class, so the improvement of the protective force is not very large, but the load thus freed up greatly increases the range of the Nanchang-class heavy cruiser, which has great practical significance for the Chinese Navy without overseas bases.

In addition, it is worth mentioning that double-sided hardened armor is also a modern armor jishu that can be used on warships, which means that the potential of the protection of the Nanchang-class heavy cruiser has been fully tapped, and unless someone invents a super-level jishu that surpasses the level of the twenty-first century, or sacrifices other performance, the armor protection ability of the Nanchang-class heavy cruiser has been difficult to enhance at all. However, the main reason for Hu Weidong's suspension of the study of warship armor was the development trend of non-armor warships after the war

In addition to artillery and armor, Hu Weidong also did not hesitate to remove the six torpedo tubes that had long been unpleasant, on the grounds that for the heavy patrol with a full load displacement of more than 18,000 tons, the chance of using it is not large, and once it is hit by the enemy, it will cause great danger, and it will do more harm than good to keep it, so it is better to remove it with peace of mind.

In addition, the seaplanes carried in the design of the two heavy cruisers and their supporting gunpowder catapults were also canceled by Hu Weidong, this was out of the same safety considerations as the removal of torpedo tubes, to prevent seaplanes, especially gunpowder catapults, from becoming weak points in the defense of Nanchang-class heavy cruisers in battle, and second, to avoid the seaplanes sent out for reconnaissance to expose the traces of the warships, after all, with the slow flight speed of seaplanes, it is difficult to get rid of tracking once they are targeted by the enemy.

In fact, Hu Weidong had made the same suggestion to the German side before, but the Germans always felt uncertain about the fact that long-range shelling relied entirely on radar guidance. However, Germany's world's best optical sighting device could not be separated from the cooperation of the aircraft (otherwise it would not be possible to get rid of the limitations of the earth's curved surface), so they finally kept the seaplanes on the ship. Hu Weidong could only shrug his shoulders helplessly, and he admitted that the performance of the current radar is indeed not as good as that of the first optical instrument in Germany. Especially in the weather with good visibility, there is great potential for radar as a new jishu, even before the cooperation with Germany jishu has consolidated China's industrial base. A new model is also launched almost every few months, not to mention in the future.

Seeing that the Germans were so stubborn, Hu Weidong did not insist too much. But on China's own warships, he still always demanded that radar be used as the basis of the fire control system, and according to his estimates, according to the pace of development of the Chinese radar Jishu, within a year, the shipborne radar could completely replace the role of optical instruments, except for small-caliber anti-aircraft guns, which required an extremely high reaction speed. So. The existence of seaplanes obviously did more harm than good, and it was inevitable that they would be removed, but Hu Weidong was touched by this, and he came up with the idea of developing a carrier-based helicopter, which did not need a dangerous gunpowder catapult. It also has a small fuel load, even if it is destroyed by the enemy, it will not cause serious consequences, and the target is smaller and not easy to be detected by the enemy, and the space and load on the warship are much smaller than that of a seaplane, and the carrier-based helicopter is also in line with the trend of post-war naval development, so this can be considered

It's just that the difficulty of helicopter development is far more difficult than Hu Weidong imagined, in fact, as early as when he first introduced talents from abroad, he had already used historical helicopters (to be precise, helicopters with practical value. The inventor of the Russian-American engineer Igor Murphy. Ivanovich. Sikorsky brought it to China and allocated funds for the development of helicopters, but due to the weakness of China's industrial base, not much breakthrough has been made in the past two years, so that Hu Weidong was even worried that the invention of helicopters would be delayed due to his own intervention. Fortunately, after the comprehensive cooperation with Germany, not only China's industrial base is much thicker, but also the introduction of the rotorcraft jishu from Germany, which has taken the wrong path but has great reference value for helicopter development, thus greatly accelerating the development progress of helicopters

In April 1939, Sikorsky's research team finally succeeded in building the first practical helicopter, the VS-300, and in the following year, several major breakthroughs were made, and finally at the end of 1940, the first finalized helicopter "Z-1" was put into mass production. The Z-1 is a two-seater helicopter with a maximum take-off weight of more than 1,200 kg, a cruising speed of 115 km/h, a range of more than 360 km, and a practical ceiling of more than 2,000 meters. "Z-1" can carry 1 driver and 1 observer. With only that pilot, it can also carry 1 depth charge and take off from a warship on an anti-submarine mission. It seems that this helicopter seems to be good, but the immature rotor power at this time has made the reliability of the "Z-1" has been criticized, and the preciousness of Chinese pilots has limited its application. It was not until later, after the second-generation helicopter "Z-3" using gas turbines was put on board, that it began to be universally praised and promoted on various types of ships, but by then World War II had come to an end.

Besides, it was only 1939 at this time, so Hu Weidong only set aside a platform on the Nanchang-class heavy cruiser for future helicopters. Compared with the helicopter platform, the area occupied by the 4 seaplanes and their catapults is too large, and it is a great waste to have such a large area empty, so Hu Weidong decided to install a main turret and corresponding other facilities at the rear of the Nanchang-class heavy cruiser after consulting the German warship designers, which also made it the most powerful heavy cruiser in World War II, even if the difference in artillery performance of various countries is still the same, its basic parameters are as follows:

Standard displacement: 14200 tons, full load displacement: 18500 tons

Dimensions: 205.9 meters long, 21.3 meters wide, 5.8 meters draft

Power: 12 high-pressure heavy oil boilers, 3 steam turbine engines, the maximum power of the main engine design is 156,000 horsepower

Speed: 36 knots

Endurance: 10,800 nm / 16 knots

Main guns: 4 triple 203mm turrets

Air defense: 6 double-mounted 127mm anti-aircraft guns, 8 double-mounted 88mm anti-aircraft guns, 8 twin 37mm anti-aircraft guns, 12 twin-mounted 25mm anti-aircraft guns, 6 "Skynet" 7-barreled 25mm anti-aircraft guns.

Anti-submarine: 2 rocket depth launchers (maximum range 1500 meters), 2 hedgehog guns (maximum range 300 meters).

Armor: waterline main armor belt 25-50mm (Note 1); horizontal armor 50-80mm; turret (frontal) 120mm; conning tower 125mm; Mine armor, three layers of 25mm each.

Crew: 1800 people

Note 1: The reason why the thickness of the armor of the main armor belt of the side chord is greatly reduced is because the combat mode of the Chinese Navy is very different from that of Germany, unless the Nanchang-class heavy cruiser is a small ship that bullies the enemy, it will rarely bombard the enemy ship with a side chord, so the side chord armor does not need to be so thick, and because the head and tail to the enemy (pursuit or escape) is the main combat method, the probability of the turret being attacked by large-caliber armor-piercing shells in front of the turret is very large, so armor protection is very important. As for the horizontal armor, taking into account the insufficient power of dive bombing, the thickness of 50-80mm is enough (to be continued. )