When General Zhang left with the Tiangong 001 UAV, Wang Bin was very happy. After all, the amount of this transaction was as high as more than 100 omnipotent coins! This is definitely the biggest deal sold since we got the technology mall system.


    At the same time, it also makes Wang Bin more firm. In the future, the products sold in the stores of the science and technology mall should be close to high technology as much as possible. Only in this way can he get more energy coins. At the same time, he also has more energy coins to buy more current technologies in the system.


    Subsequently, Wang Bin opened the technology mall system and found the space engine technology he needed. At the same time, he also had a certain confidence in his heart.


    After all, although he had hundreds of thousands of energy coins in his hands before, compared with various space engine technologies in the system, such a little energy coin can not buy any real rocket engine technology with a high degree of high technology, What you can buy when you go out is just the same technology as the rocket engine technology of various countries in the real world.


    Now he has 1.5 million more energy coins in his hand, that is, he has almost 2 million energy coins in his hand. In this way, he can still buy some really advanced rocket engine technology.


    Of course, although he is going to buy one or two high-performance rocket engine technologies with high thrust, they also need those rocket engines with tens or even hundreds of tons. After all, there is only high thrust rocket technology, but there is no low thrust, so it is impossible to manufacture multistage rockets and bundled rockets.


    Of course, compared with other things, kanxing world''s rocket technology is naturally the first choice for rocket technology, because kanxing world''s rocket technology is more complete than other technologies he can buy. There are not only cow level micro rocket technology, ion rocket technology, but even rocket engine technology with a thrust of thousands or even tens of thousands of tons, There are no shortage of stars.


    Of course, like other technologies, among these technologies, the higher the technical content of the rocket engine technology, the higher the energy currency required, and the stronger the thrust, the higher the energy currency required by the rocket engine.


    For example, the first generation plasma propulsion technology in kanxing world has a thrust of only a few cattle, and the energy money required is not many, as long as hundreds of thousands.


    As for the second generation plasma propulsion technology, although its thrust has reached the kiloniu level, it needs millions of energy coins.


    By the third generation plasma propulsion technology, its thrust can be equivalent to that of chemical rocket propulsion, reaching tens of thousands of cattle, or even hundreds of thousands of cattle. However, the energy money required is also very terrible, at least more than ten million.


    As for ordinary liquid fuel rocket motor technology or solid rocket technology, such technologies as the first generation and the second generation are still very different from those of more than two generations in terms of price under the same thrust.


    After all, even if the first and second generation rocket engine technologies are put outside, they are already backward technologies in this era. Therefore, in terms of price, they will basically not exceed 500000 energy coins. Even if the 2000 ton rocket engine technology with the largest thrust in the first generation rocket engine, its price is only 250000 energy coins, The price of the second generation of the same 2000 ton rocket engine is much higher, reaching the level of 50 million yuan, which is twice as high as the technology of the first generation of 2000 ton rocket engine.


    However, when it comes to the third generation of 2000 ton hydrogen and oxygen engine, the price in the system is higher. Even compared with the second generation technology, it is more than twice as high. In other words, the price of the third generation of 2000 ton rocket engine technology reaches 100 universal currency.


    However, if we already have the first and second generation rocket engine technology, we don''t need such a high price. Only 500000 is enough.


    As for engines with thrust above 2000 tons, they do not appear in the first and second generation technologies, that is, engines with thrust above 2000 tons start directly from the third generation engines.


    Of course, the price is naturally in line with the three generations of engines. However, even in the third generation of ordinary chemical rocket engines, there are not many with a thrust of more than 2000 tons, only three, that is, 3-4-5 thousand tons.


    In terms of price, naturally, the bigger the push, the higher the price. For example, the price of the third-generation rocket engine of 2000 tons is 1 million, and the price of the third-generation 2000 tons is twice that of the third-generation 2000 tons, that is, 200 million yuan, while the 4000 tons is also twice that of the 3000 tons, 400 million yuan and 5000 tons are 800 million yuan.


    As for the price of the fourth generation engine, as before, it is only twice that of the third generation rocket engine. However, compared with the third generation rocket engine, the performance of the fourth generation rocket engine is naturally more advanced.


    If the performance of the third generation rocket engine technology has reached the standard of the highest rocket engine in the world, the technical content of the fourth generation rocket engine technology is definitely much higher than that of the world''s top rocket engine


    If calculated according to the level of science and technology, the level of the fourth generation rocket engine has reached the level of 0.85 or even 0.9 civilization.


    Unfortunately, the most advanced rocket engine in the system has only reached the fourth generation, and there is no fifth generation rocket engine.


    According to the systematic description, after the fourth generation of rockets, all civilizations basically no longer develop ordinary Chinese Rockets. Even the fourth generation of rocket engines are actually no longer pure chemical Mars, but engines combined with force, electromagnetism, nuclear energy and other technologies, just because of the fourth generation of engines, The most important energy is still chemical fuel, so it is still classified as chemical rocket engine technology.


    Of course, for engines above the fourth generation, let alone the system is not available, or he is not qualified to buy it. Even if he is qualified to buy, the price is not what he can afford with the little energy currency in his hand. Even if he buys it, he can''t make it with the current strength of Tiangong technology.


    Therefore, for ordinary chemical rocket engine technology, Wang Bin''s heart still tends to buy the fourth generation technology. After all, even the best of the third generation technology has reached the world''s top level.


    Now that they want to develop aerospace science and technology, naturally they can''t be lower than people. With the strength of Tiangong science and technology, Wang Bin also believes that Tiangong science and technology can make four generations of rockets.


    In terms of the thrust of the rocket engine, since Wang Bin and their Tiangong technology have not yet started to get involved in the aerospace field, they naturally don''t need too much first. They only need 2000 tons or even less than 1000 tons.


    Moreover, according to Wang Bin''s judgment, in fact, the fourth generation rocket engine technology, whether 1000 tons or 2000 tons of thrust, should be similar in principle. If he bought a 1000 ton propeller, their technicians of Tiangong technology want to rely on their 1000 ton fourth generation rocket engine technology, It is not impossible to develop a rocket engine with stronger thrust.