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Chapter 1350 World Leading

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    You must know that China Tengfei¡¯s three-dimensional weaving technology did not achieve a breakthrough in a flash of inspiration, but has been continuously invested for twelve years.

    In other words, when China Ascendas was still a weak Ascendas Group, the three-dimensional weaving process had already become a key core technology that the Ascendas Group was preparing to conquer.

    The reason for this is for no other reason than that when the Ascendas Group was researching carbon fiber composite materials, it discovered a unique weaving technique to change the order of carbon fiber filaments, so that the carbon fiber composite material produced has its own specular reflection effect.  , thereby reducing radar reflectivity and achieving the so-called radar stealth effect.

    This discovery can be said to be one of the most important achievements of the Tengfei Department in the field of scientific research at that time. Once discovered, it was classified as a secret by the headquarters and focused on research and development.

    There is no way, this discovery is really too important, because once this technological achievement is applied, it will not only solve the problem of stealth materials for next-generation combat aircraft and bombers, but more importantly, it can greatly reduce the later maintenance and maintenance of stealth aircraft.  The problem of excessive maintenance costs has greatly improved the equipment condition, attendance rate and availability of stealth aircraft.

    Not to mention the country, which did not have sufficient financial resources at the time, even the United States, whose annual funding accounts for more than 40% of the world's total expenditures, if it knew that the Tengfei Department had such technological achievements at that time, it would still be flocking to shout, I want it, I want it, I want it.  I want to

    As the saying goes, landlords have no surplus food. Although the United States is wealthy, the ridiculously high maintenance and upkeep costs of stealth aircraft still make it difficult for the US military to bear.

    The reason for this is very simple. Most of the stealth aircraft developed by the US military were pre-researched in the 1970s and entered into substantial research projects in the 1980s. Although technically they are still the best in the world and can be called the South Bay of the Solar System, in concept they are still seven or seven.  Old stuff from the eighties.

    Therefore, the US military's stealth relies more on advanced activation shapes + non-metallic materials with low radar reflectivity + thick absorbing coatings to reduce the effectiveness of radar detection.

    ¡°China Tengfei has directly surpassed these three iron-clad urban regulations in the field of stealth aircraft design, starting from the material itself, so that the material itself has extremely strong radar wave absorption and scattering functions.

    This is like playing a shy two-player game with a goddess. Due to physical reasons, the exhausted pretty girl naturally has to do enough foreplay, including 9 and licking, and tossing and turning for more than an hour, but the actual result is less than two minutes.

    It's different for a strong man with a strong physique. He is big, durable and good at sex. Naturally, he doesn't need any foreplay. He just waits for 60 minutes first. If he feels uncomfortable, he adds another half minute, which will directly make the goddess feel deep in his soul.  Ascension to bliss.

    Compared with Americans' work, China's path to take-off is more like a straight-up hard-on. Since its own conditions are so good, it is regarded as a treasure by the Americans and has been classified as a secret stealth paint from beginning to end. What is the impact of China's take-off?  In terms of technical path, it can only be regarded as the icing on the cake, not a necessity.

    It is good to have it, it can further reduce the probability of radar reflection. If there is no problem, it is not a big deal, because the material itself has extremely strong radar wave absorption and scattering functions, and can still achieve the stealth effect.

    Now that complex and expensive stealth coatings have become dispensable, there is no need to care so much about maintenance. If conditions are favorable, it can be sprayed. If conditions are not met, a layer of ordinary coating can still make the third-generation machine look better.  Press it on the ground and rub it hard.

    The problem is that China Tengfei's technical path is good, but it is very difficult to realize. The reason is very simple, that is, the entire fiber weaving method is very complicated, so that in the first five years, the Tengfei Group could only rely on simple  The equipment manually completes the preparation of test samples.

    The scrap rate and material waste rate are frighteningly high, not to mention the time cost. It often takes more than three months to complete, but even so, only one test sample the size of a TV remote control can be produced each time.

    Under such circumstances, no matter how promising the carbon fiber special braided stealth path is, it will never be put into practical use. After all, stealth aircraft are industrial products, not works of art. Since they are industrial products, they involve large-scale mass production. Even if they are  China's take-off technology path can greatly improve the performance of stealth aircraft, but it is useless if it cannot be industrialized and mass-produced.

    Therefore, finding an industrial mass production method that can mass-produce this special carbon fiber composite material with its own stealth properties became the focus of Ascendas Group's research in this field at that time.

    However, the problem is that even if you know what the problem is, it is very difficult to solve it. How to do it, how to do it, and what plan to use. Not to mention the Ascendas Group at that time, even if it is put on the whole world, it is probably the same.  Sub paste.

      Just when Ascendas Group was at a loss to solve the problem of industrialized mass production of stealth materials, an article in NASA's internal academic journal obtained through special channels aroused the concern of relevant team members of Ascendas Group at that time.  Notice.

    The title of the article is "The Feasibility of Realizing Mirror Reflection of Carbon Fiber Materials Through Three-Dimensional Weaving Technology". The author is Richard Mendelsohn, a Swedish-American aerospace materials scientist who works at the NASA Aerospace Materials Laboratory.  He has participated in the research and development of aerospace materials in many cutting-edge fields of NASA.

    Mendelsohn's article was a technical solution he came up with in his spare time, which is to use NASA's set of high-performance military reconnaissance satellites, advanced space telescopes, stealth aircraft, and new strategies to  Aerospace products such as transport aircraft provide three-dimensional braiding machines made of high-strength composite materials. By re-programming and constructing new arrays, it may be possible to achieve a certain radar mirror reflection effect through changes in fiber winding and internal linking methods.

    Although Mendelsohn¡¯s article did not explain the specific feasibility, he stated in the comments of the article that this was just a guess, and there was no so-called follow-up.

    After all, DuPont is behind the US military's stealth coatings, and the annual profits are not as big as usual. If a new gadget that is dispensable for stealth coatings is really developed, are you going to let DuPont drink from the Mistral Soldiers?

    If you want a follow-up, unless DuPont rushes to the street, it¡¯s almost the same.

    But regardless of whether there is a follow-up or not, whether it is feasible or not, for the Ascendas Group at that time, it was tantamount to obtaining a treasure, because the Ascendas Group, which had already accumulated a lot in this area, knew very well that Mendelsohn¡¯s guess was not only correct,  And it¡¯s extremely feasible.

    What else can you say?  American experts have already pointed out the direction, and then just roll up your arms and get started. So for more than ten years, after going through the first generation dl-520 three-dimensional knitting machine; the second generation dl-527 three-dimensional knitting machine, finally in  Last year, China Tengfei successfully developed the third-generation DL-535 three-dimensional knitting machine that can weave carbon fiber composite materials with its own stealth properties. Since then, it has become a world leader in this field!

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