In addition, the different materials have different requirements for the design, and when Sukhoi fine-tuned the design, this fighter called the "Swift" in the West became the best piston single-engine fighter during World War II with its unimaginable speed, maneuverability, range and super fuselage protection. ,!

The reason why China's aviation industry, which has a weak foundation, has been able to make a splash is that in addition to the introduction of a large number of foreign advanced equipment and outstanding talents, the huge advantages in material science and technology are even more significant. Epoxy resin reinforced paulownia wood appeared too late in history, when the alloy used in the aircraft has transitioned from aluminum alloy to titanium alloy, and there are many categories, excellent performance, and the jet aircraft is too fast and extremely resistant, so the requirements for the strength of the fuselage are much higher than that of piston aircraft, especially the surface high temperature generated by supersonic flight is an unsolvable problem (although epoxy resin is quite good in various synthetic resins, but the temperature is too high, it will still soften, or even catch fire). At the same time, there were many strong non-metallic materials such as carbon fiber, and the labor cost of reinforced paulownia wood was high, so the value was very limited. But at the moment when World War II has not yet broken out, the performance of this material is absolutely outstanding, and even the so-called "Igarashi metal" that created the myth of the Zero fighter in history - chromium-nickel-manganese super-hard aluminum alloy is far from comparable, and the specific gravity of the reinforced paulownia wood foundation is less than 0 in the case of similar strength. 15. The overall proportion is less than 0. The extreme lightness of the 4 clearly has an overwhelming advantage, and with the industrial base of the current border area. On the contrary, the cost of producing reinforced paulownia wood is lower than that of chromium-nickel-manganese super-hard aluminum......

The strength of the turbocharger produced in the border area is also directly related to the application of high-temperature resistant materials that are beyond the times, and these alloys are only modified from the steel materials of the tank barrel provided by Hu Weidong for living purposes, so it can be imagined how amazing the effect will be when the ammunition, barrel and armor materials in Hu Weidong's memory are used in their most suitable positions. To cite an example here, the Zhiyuan was heavily damaged in the previous battle, and the frontal armor of the two rear main turrets was almost completely destroyed, so Hu Weidong naturally replaced it with a new one. The new turret armor is a radical change from before......

It should be known that even the ordinary homogeneous steel used in the penetration ability test of later generations (this is the thing that was used to penetrate tank guns in later generations with a thickness of seven or eight hundred or even more millimeters), the strength including hardness is 2-3 times that of similar alloy steels during World War II (in other words, later tanks shelled the armor steel of World War II. It is possible to wear more than 2 meters deep...... If you apply composite armor and other super era jishu, the effect is even stronger than unimaginable.

Having said that, due to the inconvenience of composite armor maintenance (if it is broken, it is directly replaced with a new one, and the tank is small in size, so it doesn't matter if it is done, and the cost of warships is too high. ), so it is difficult to apply on warships. And because the demand is too large, the weight of the armor of the main turret of a warship is equivalent to the total weight of the armor of dozens or even hundreds of tanks. Therefore, too expensive special materials could not be used, and Hu Weidong did not want to affect the speed and endurance of the Zhiyuan too much, so he only increased the thickness of the armor on the front of the turret to 80 (the thickness of the armor on the top side and back was increased to 30), and the ability to resist armor-piercing shells was equivalent to the effect of the thickness of the armor used by the Zhiyuan (Note 1), the original biggest weakness suddenly became an advantage, and the armor of other parts of the warship was also replaced one after another. Its overall defense capability suddenly surpassed that of any type of heavy cruiser on the Shijie at that time......

And because the bow of the ship was changed to the bulbous bow that is rarely used on the Shijie at present, the maximum speed of the Zhiyuan class has not decreased, but has increased, reaching 36 knots. However, the cruising speed has decreased (Note 2). In addition, it has to be mentioned that Hu Weidong removed the three seaplanes carried on the ship, which not only freed up the load and space, but also prevented the gunpowder catapult (Note 3) and the spare powder magazine under it from being hit by the enemy during the battle and causing disaster to the whole ship.

As for the role of water reconnaissance aircraft in correcting shelling, it became unnecessary with the installation of regular shipborne radars. In the fine weather (with the level of technology in this era, the enemy's detection range is also limited in bad weather, so there is no need to worry too much. Weather. The shipborne radar can detect enemy ships at a distance of 40 kilometers from the sea, and it is enough to guide the ship's guns, and you must know that unless the enemy ship is in a berthing state in a naval battle, it must be at least within 25 kilometers before it can hit the enemy ship; The air detection distance has reached 150 kilometers away. It was enough to detect the incoming enemy aircraft in time.

Although the reconnaissance range is definitely larger than that of seaplanes, aircraft reconnaissance is still basically dependent on visual inspection (the detection range of airborne radar during World War II is only a few kilometers, and air combat is somewhat useful at night, and it is better to search the sea during the day than direct visual inspection...... Therefore, when the enemy is discovered, he is often discovered, but the seaplane is slow, and if he is entangled by the enemy plane, he will not want to get rid of it, but it is easy to expose the existence of his own warship......

Note 1: Compared with the performance of the armor steel used by several major naval powers in World War II, the British is the best, and the German is slightly inferior (but the structural steel is the best, so the sinking resistance is extremely strong. There is a certain gap between the United States and the two countries, and Japan, except for the Yamato Musashi, which has concentrated the strength of the whole country to make a fine product and the armor performance of American warships, the armor used by the rest of the warships is inferior to Britain and Germany, so the strength of modern homogeneous armor steel is set in this book is 3 times that of Japanese armor and 2 times that of the United States. 5 times, 2 times the British and German ......

Note 2: The bulbous bow can reduce the wave resistance, and increase the speed of the ship by 1-2 knots under the premise of the same power, but the principle is quite complicated, the specific form is only in its corresponding small speed range, and the effect is obvious, and if the difference is large, it even increases the resistance, Hu Weidong chooses to strengthen the maximum speed, so the cruising speed that is far away will naturally be affected. As for the design of the bulbous bow, there are now six or seven Shijie-level fluid mechanics experts in the border area, and it is naturally not difficult to have their help......

Note 3: During World War II, aircraft catapults were basically gunpowder catapults, which had the advantage of simple structure, but at the same time, they were also a major safety hazard for warships, and the ejection liliang was too small to help fly various heavy aircraft, including later jet aircraft, so it was replaced by steam catapults after the war.

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