PS: Thank you book friends "Old Man Li", "GHOULLI", "llz432" and "nqm" for their monthly tickets, today is Chinese New Year's Eve, here is an early year in advance, I wish you all a good ^_^ year in the coming year

Since China is also preparing to adopt the Type 59 tank as China's main battle tank in the next two decades, even if the appearance of composite armor will change greatly, the expert only needs to look at the load wheels to understand. Therefore, Hu Weidong played a heart, he did not give the design directly to Germany, but deliberately exposed the flaws for the German spies to steal it, so that not only blocked the mouths of the allies, but also had an excuse to sever diplomatic relations with Germany, after all, the crimes committed by the Nazis cannot be washed clean, and it is necessary for China to clear up its involvement as soon as possible, anyway, even if the diplomatic relations are broken, the business can still be done!

No matter how powerful the tank is, it is afraid of aircraft, but because the performance of the German FW190B/C/D three models has almost reached the limit of piston aircraft, the potential for improvement is not large, and it is also very good to be slightly modified for tactical bombing, so there is not much need for the improvement of tactical bombers. As for strategic bombers, Hu Weidong didn't know much about them, and Germany's national strength didn't support them, so the focus of an exchange between the two sides focused on future jet aircraft. In the end, experts from both countries made a lot of gains, and China's jet aircraft development progress was greatly advanced, and the German jet fighter developed later was also greatly improved in terms of reliability compared with history.

Germany benefited greatly from Hu's suggestion to use kerosene as a jet engine fuel and to conduct research in advance, as early jet aircraft in history did not have a dedicated fuel. Generally, gasoline is mixed with kerosene, due to the defects of strong volatility, flammability and explosiveness of gasoline, the accident rate of early jet aircraft is extremely high, if you can get aviation kerosene out in advance, it can undoubtedly greatly reduce the mortality rate of pilots.

In addition, Hu Weidong also said three ideas that later had a major impact on the course of World War II: First, the proximity fuse can be used not only to use anti-aircraft shells against aircraft, but also to deal with ground troops, and the lethal effect is very amazing, just as anti-aircraft machine guns and small-caliber anti-aircraft guns are equally powerful against ground troops; The second is with radio jammers that can cause the proximity fuse to be triggered in advance and cannot reach the real target. Although the methods of such electronic countermeasures can be easily cracked once they are known to the enemy. But when you use it for the first time, you can still receive miraculous results, and if you use it well, you can completely make the enemy's main fleet suffer a fatal blow; The third is early warning aircraft, although the current German army lacks haode aircraft platforms, radar jishu can not be compared with the level of early warning aircraft when it was invented in history. But at least a warning range of 80 kilometers can still be done. A little more improvement can reach more than 120 kilometers. Such a large warning range is enough to expose any sneak attack launched by the enemy from the sea or the ground in advance, and to allow its own planes to rise into the air in time to meet the enemy, but early warning aircraft are more valuable to the United States, which has more aircraft and also has large transport planes as a platform. So it is worth considering when Germany will take it out

As for naval equipment, the Chinese side did not give much help to Germany, but received two seemingly inconspicuous but quite important jishu from Germany. The first is the hydrogen peroxide torpedo, which can replace the oxygen torpedo, which can make the aviation torpedo, a weapon that has been eliminated by the Chinese Navy, very valuable again, and thus greatly strengthen China's coastal defense; The second is the snorkel jishu used on submarines, and the value of this invention is greater.

Although the Germans achieved quite amazing results in the Battle of Iceland, they were ultimately defeated in terms of the purpose of the campaign. Moreover, the weakness of the drop-shaped submarine, which was slower than the old ship-shaped submarine when sailing long distances, was gradually exposed, and as a result, two expensive drop-shaped German submarines were sunk by the US military one after another.

In order to solve this huge weakness, which seriously affected the strategic mobility and survivability of the teardrop-shaped submarine, a German engineer advanced (historically until the end of World War II, when Germany was almost gone. Figured out a way to put a snorkel on the submarine.

In this way, the submarine can start the diesel engine underwater, the air required is introduced by the snorkel, and the exhaust gas generated is also discharged by the snorkel, and the submarine no longer needs to float to charge, and even directly use the diesel engine to drive the underwater navigation (of course, the speed will be slower in the state of the snorkel), not only will the speed be affected by frequent floating during long-distance sailing, but also the concealment of the submarine will have a great leap forward, although the snorkel and periscope that extend out of the water can be detected by the enemy's airborne radar, But the distance required is, after all, much closer, and this danger is almost negligible in real combat

Hu Weidong also knew that he was a layman after all, and he only knew a little about modern submarines, if the Germans didn't take the initiative to say it, the Chinese submarines without actual combat would not know when they would be able to discover this problem, and sure enough, need is the biggest driving force for scientific and technological progress! Of course, the snorkel jishu content during World War II was not very high (Note 1), and it would have been easy for China to invent it once it was discovered in the future, and the Germans would not have been so kind if it hadn't been for that.

But even so, Hu Weidong reciprocated by giving the Germans a good idea that could further enhance the concealment of the submarine, that is, to install a small detector of radio waves at the top of the snorkel, and use it to receive centimeter waves or millimeter waves, because the radar that could detect the submarine during World War II was in these two bands, and there was no microwave communication at that time, so as long as the radio waves in this wavelength range were received, they must have come from the enemy's radar. At the same time, the detector is set to automatically alert the ship as long as the intensity of the radio wave in the selected wavelength range exceeds a certain value, so that the enemy's radar can be warned in advance, and the enemy's aircraft and anti-submarine ships can dive and hide before they approach

Note 1: Modern submarines are different, because the anti-submarine capabilities of various countries are far from comparable during World War II, so the diving depth is much larger to be relatively safe, and the snorkel does not dare to extend out of the sea too much, its concealment, strength and even monitoring (there have been Chinese submarines because of the strong wind and waves at sea caused seawater to pour into the ventilation pipe to make it automatically shut down, and the generator on the boat is still running, consuming a lot of oxygen in a very short period of time [oxygen consumption is more than one-third, and the carbon dioxide concentration in the boat is enough to cause severe hypoxic suffocation. This caused the suffocation of all the officers and men on board, causing a serious accident of major shipwreck. ) have higher requirements (to be continued......)