Take the 9 203mm main guns on the "Nanchang-class heavy cruiser" as an example, the original selection was an improved version of the German SKC/34 naval gun, because Hu Weidong strongly recommended the use of a fully automatic loader, so that the rate of fire of the 203mm naval gun, which had the strongest comprehensive performance in the history of World War II, was greatly improved, reaching the same maximum rate of fire as the American 203mm naval gun of 6 rounds per minute, but at the same time that the rate of fire was greatly accelerated, due to the new barrel steel provided by the Chinese side, the average life of the barrel of this naval gun was almost not reduced by half a point.

The improved SKC/34 naval gun has opened a long gap with other guns of the same caliber on the shijie at this time, but the Germans did not expect that Hu Weidong had not yet come up with all the dry goods. Take the barrel steel as an example, the formula and process provided by Hu Weidong are used to manufacture army artillery, and the rate of fire of army artillery is much lower than that of naval guns of the same caliber, so the performance is naturally much lower.

In addition, although the German artillery experts were already first-class, they were still accustomed to designing the gun first and then finding the right material for the gun, so they simply replaced the new material after obtaining it, except for extending the life of the barrel and obtaining other performance improvements. As one of the world's top artillery and ammunition experts in the 21st century, Hu Weidong was able to tailor the design of the cannon according to the performance of the material, so after the two heavy cruisers were determined to be owned by the Chinese Navy, Hu Weidong's redesigned 203mm naval gun was much better than the German cannon in performance, and under the premise of no less accuracy, this 203mm naval gun not only had a maximum rate of fire of an astonishing 10 rounds per minute, but also had a barrel life of more than 800 rounds at the same time

However, the materials used are better, and the cost has increased a lot, especially the amount of rare earth, tungsten, molybdenum and other alloy components is several times higher than that provided to Germany. However, China's resource reserves are much richer than Germany's, especially Chinese specialties such as rare earths, plus the 203mm naval gun is already the largest caliber artillery of the Chinese Navy. Moreover, the Nanchang-class heavy patrol will not be equipped too much with China's national strength, so it is completely affordable. In fact, for a country like China, which is rich in resources but has a low degree of industrialization. Production man-hours and product quality are the key to determining production costs, and because Hu Weidong has been focusing on quality management and simplifying artillery design as much as possible, both of these aspects are satisfactory. Therefore, on the whole, the 203mm naval gun designed by Hu Weidong is not cheap. But it is not ridiculously expensive, and the production cost is fifty percent higher than the original German naval gun, considering the significant increase in performance. The value for money is actually not bad.

In addition, Hu Weidong specially developed a variety of new ammunition for him (Note 1), its power in actual combat is far from any of the same caliber artillery on Shijie can be compared, and the use of new propellants increases the bore pressure and muzzle velocity of the artillery, and its maximum range is more than 50 kilometers, although because of the hit rate, it is almost impossible to hit the enemy ship if it exceeds 30 kilometers, but the power of the gun with a large range is also great (under the premise that the shell and the propellant are the same)!

In addition to the 203mm main guns on the Nanchang-class heavy cruisers. Hu Weidong also designed a large number of new artillery pieces, including antiaircraft guns, tank guns, and aerial guns of various calibers, thus greatly enhancing the overall strength of the people's army. But even Hu Weidong himself had to admit that if it weren't for the military precision machine tools, 10,000-ton hydraulic presses and other strategically important processing equipment provided by the Germans, he would have had the ability to do it again. It is impossible for China to develop these guns so quickly and start mass production soon, and without high-quality artillery, many advanced special ammunition will also be unusable, so even Hu Weidong, who has always been a fan of the Soviet Union, has a somewhat favorable impression of Germany, even if he knows that the two countries are actually just using each other

In addition, there is a key jishu has to mention, that is, the armor is hardened on both sides, this jishu can greatly enhance the armor's anti-penetration ability, up to 50%, although the thickness of the armor exceeds a certain limit, the increase will be smaller and smaller, but in terms of heavy patrol with not very thick armor, it can still get a fairly obvious improvement, and then count the huge advantages of the performance of the new armor steel itself, The defensive capabilities of a double-sided hardened 80mm armor plate could almost be compared to the armor of a Japanese battleship up to 300 mm thick, which was terrifying

Historically, this armor was originally invented by the Americans, and although the research in China started quite early, because some technological keys could not be figured out, and the industrial base was too weak, the cost could not be reduced, so it was naturally impossible to apply it in large quantities. It wasn't until the 21st century that Chinese armor experts finally made a major breakthrough in this area, and once they understood the key, the problem became incredibly simple, and the cost of double-sided hardened armor was reduced to a point where it was not much higher than that of homogeneous armor (which is better than that of the United States, but it is not known if there is a gap in performance). ), so much so that it was widely used on the cheapest wheeled armored vehicles

Hu Weidong naturally knew the secret of this jishu, but the previous research work has not been smooth, until after receiving the support of German jishu equipment, many of the original problems were suddenly solved, and this jishu was finally successfully solved, which made Hu Weidong have to sigh again the importance of the industrial base.

After the successful development of this jishu, the biggest benefit is the Chinese tank, especially the light tank, because the double-sided hardened armor is particularly effective for thinner armor, which can increase its ability to resist armor-piercing shells by 50%, and the ability to resist armor-piercing shells is even greater (because double-sided hardened armor is an extremely simplified version of composite armor), so that the latest model of the Bayi light tank (Note 2) has not increased in weight. It has amazing armor protection that surpasses that of the T34 medium tank

Note 1: Hu Weidong attached great importance to ammunition, but the German side did not fully realize the value, so in addition to the paid transfer of the concave and jujube core fully loaded bomb type, which was easy to be imitated, Hu Weidong only helped the Germans improve the alloy material formula and heat treatment process used in the armor-piercing warhead

Note 2: This is also the first official mass production of the Bayi type light tank, compared with the early Shiyan model, the application of the latest rare earth armor steel and double-sided hardened armor jishu, the main gun replaced by a 57mm anti-aircraft gun to the tank gun, in addition to the engine performance has also been significantly improved, both the maximum speed and the maximum stroke have been improved. (To be continued.) )