(For Wanwan local tyrant Torrey, that is, the alliance leader - Xiaoding - greatly plus more 1/25)

"Welcome Director Liu to inspect the work......" When Liu Yijiu followed Long Yaohua to the Ministry of Aerospace, a group of bigwigs came to shake hands with Director Liu, and some bigwigs even jokingly said such things. Pen, fun, and www.biquge.info

"Director Du, aren't you a tormented kid!" Liu Yijiu's face was flushed, Rao felt that his face was thicker than the city wall, and he could even defend against the attack of nuclear bombs, in such a situation, he couldn't resist being teased by the bigwigs of the Ministry of Astronautics. "If my father knows about it, he won't break my legs!"

"Minister Qian won't. You are our God of Wealth! This time, we have to send us funds, and it's too late to welcome ......."

"Okay, let's go into the conference room and talk about it!" Long Yaohua couldn't laugh or cry, now the people of the Ministry of Aerospace Industry are more enthusiastic about Liu Yijiu than the officials of the Ministry of Finance.

After some greetings, Liu Yijiu saw Qian Xuesen smiling at him, and even Du Bin, the mentor who guided him into the aerospace field.

Several bigwigs of the Beidou system are also in this, which shows that the Ministry of Aerospace Industry attaches great importance to his trip.

"This time, I think you already know something. The cooperation between the Ministry of Aerospace and the Ninth Academy is not once or twice, and now you both have long-term and stable cooperation, so there is no need to introduce it again. Long Yaohua presided over the meeting, and after everyone was seated, he said, "This time, it involves the most secret project in the country, Dongfeng-31, which is still in the stage of theoretical research and demonstration. What's more, the Ninth Courtyard has money! ”

Long Yaohua's introduction made all the bigwigs in the aerospace industry laugh.

Indeed, the Ninth Courtyard is rich.

Although DF-31 is said to be the country's most top-secret project, it is no secret to those involved in this project. Liu Yijiu's Ninth Academy is also top secret, and even their Ninth Academy's Computer Research Institute and other units are still undertaking some tasks.

"Xiao Liu, I heard that you loaded this missile on the ship? What kind of boats do you use to fit it? Du Jingkun was very skeptical, according to their current situation, it was not too easy to get the DF-31 to be installed on the battleships in the hands of the Ninth Academy after it was successfully developed.

Weight aside, just too large a diameter is not an easy task.

Moreover, it is even necessary to ensure that the launch is carried out while moving at sea.

"Yes, although the 13 key technologies of our project have a large number of technologies obtained during the DF-22 research, they are serious challenges in solid fuel engines, propellant synthesis, elastic cone composite manufacturing, and large-scale special trailer manufacturing. In a short period of time, it is difficult to develop successfully. Every technology needs to be constantly broken through! Qian Xuesen also felt that Liu Yijiu was a little whimsical, "Actually, the Dongfeng-31 is not suitable for the ship, the diameter is too large." ”

In 83 Dongfeng-22, that is, after the 202 project was discontinued because of Liu Yijiu's suggestion, after the demonstration of the joint demonstration group, the proposed "large diameter, basic type, serialization" plan was recognized by the ****** and the Military Commission, and in the same year, Dongfeng-31 was launched.

This is two years earlier than in history.

However, it is not because of early research that the key technologies of these missiles have made greater breakthroughs.

In particular, large solid-fuel engines, composite solid propellants, composite materials, etc., and even large special trailers, there is no experience in the country.

Dongfeng-6 and Dongfeng-7 have studied these technologies for a long time, and at this time, the basic data and technologies of those studies come in handy.

"The big diameter is not a problem, the problem is that we need the DF-31 to have higher hit accuracy, longer range, and at the same time need to have more speed. Of course, it would be better if the diameter could be smaller and the manufacturing cost lower. Rocket engine, isn't the large solid rocket engine we jointly developed with you already in test run? That's not a problem. As for the rest, we don't need trailers or anything, we can get propellant synthesis, and the rest is composite materials, which we can also solve......" Liu Yijiu said without exaggeration.

Immediately, some bigwigs in the Ministry of Aerospace were shocked.

If so, the Ministry of Space Industry would only need to solve the heavy trailer to be able to make this long-range ICBM a maneuverable launch!

"Really? What can you do to advance the synthesizer process? The speed of the re-entry phase of the cone, after entering the atmosphere, will exceed Mach 10, how to solve the problem of heat protection at that time? Qian Xuesen asked Liu Yijiu with a frown.

This kid hasn't had a good chat with him for a few years, and now he doesn't even make drafts for bragging!

"Wouldn't it be easier if we had done new research on the Red Star-10 missile used by Niptosan, although it uses a single solid propellant, but the terminal hydroxyl polybutadiene allows the missile to reach speeds of Mach 12 outside the atmosphere? As for composite materials, we can use organic compounds such as aramid fibers/epoxy resin shells to reduce the weight of missile shells. As for the fairing at the top end as well as the problem of heat protection, it is easier. Not much else, we can provide at least two ......" Liu Yijiu did not brag on this.

They have the most advanced material in the world - graphene!

"Then you can talk about how to solve the problem of heat protection in the re-entry stage of the missile? Would you like us to tell you about the design ideas? Du Zhongkun was a little dissatisfied with Liu Yijiu's bragging.

The aerospace bigwigs are all unhappy.

If Liu Yijiu can't solve these problems, just bragging here, it is estimated that after this meeting, he will have to be beaten.

Obviously, seeing that the faces of the bigwigs around him were not good-looking, Liu Yijiu didn't care at all, this time the graphene was not given to them, but proposed a solution to the historical Dongfeng-31. It's just that I'm a little sorry for Professor Pan Ding, who researched this kind of material.

For the design of the DF-31, he is too familiar with it.

He immediately shook his head, "You yourself feel that this thing is secret, and there is nothing mysterious about it." Isn't it because of the miniaturized warhead design, which makes the fairing on the top more sharp, resulting in the obvious aerodynamic heating effect of the warhead part after re-entering the atmosphere, and the carbon/quartz ablation material used by Dongfeng-5 cannot prevent the heat generated at higher speeds at all...... "Liu Yijiu's words made many aerospace bigwigs stunned!

It's top secret.

How did this kid know?

There is a way for laymen to see the excitement, and insiders to look at the doorway, Long Yaohua is a layman, he is often boycotted by these technical bulls, Liu Yijiu, this kid is obviously avenging him. Although he didn't understand what Liu Yijiu said, he was obviously very profound, and he suppressed the gang of aerospace bosses, and his heart naturally blossomed.

"Then tell me what kind of materials to use!" Even Qian Xuesen was a little anxious.

If these problems are solved, the DF-31 will soon be able to enter the sample trial production work.

The process is completely capable of improving I don't know how many times.

"Quite simply, using high-purity viscose-based carbon fiber solves this problem. I think everyone should know that in order to reduce weight and improve strength, our fighters and helicopters use a large number of composite materials...... "Originally, Long Yaohua thought that Liu Yijiu would provide graphene to the Ministry of Aerospace.

didn't expect that this kid had other materials.

In this case, graphene was not taken out, which shows that this kid attaches great importance to graphene.

Is a material really that heavy or?

"High-purity viscose-based carbon fiber?" The aerospace bigwigs who know the material are all frowning and thinking.

"How about we? If it's cooperation, let's continue to talk, if not, forget it. Just when I didn't say it. Liu Yijiu said with a cheap smile on his face.

He was so cheap that he paused at this point.

It's like a man takes off his pants and is about to pounce on a beautiful woman who is scratching her head, and then the beauty tells him, give the money, and if you don't give the money, you won't continue......

At this time, apart from giving money, what else can men do?

After all, the pants were all off, and it was determined that it wasn't an immortal jumping or something.

"You mean to work with us?" Du Zhongkun understood that the appetite of the Ninth Academy was not small.

"Of course, with so much technology provided by us, can we do it without medling? Although we are not proficient in the overall technology of the whole bomb, high-precision guidance, etc., but the materials or anything are not a problem. Isn't it possible that we gave you the technology for nothing, and when you sell missiles to us in the future, you won't have to ask for a sky-high price? Liu Yijiu said half-jokingly, half-seriously.

"As long as the materials you say are proven to be valid, I will cooperate with you!" Big Money spoke, although this feeling was particularly awkward.

"Everyone knows that carbon fiber is more heat-resistant, but it's not easy to make a fairing out of carbon fiber and have very high strength. It just so happens that our Ninth Institute has a lot of research on materials in this area, so we have the industrial production technology of this material! What Liu Yijiu didn't say was that this was actually a kind of inferior material used to replace graphene, which was too costly.

The production cost of graphene is too high, but the strength is enough, so the Ninth Academy has worked the research of carbon fiber.

The high-purity viscose-based carbon fiber he said has not been successfully developed now, but he knows the formula, so it will not be too difficult.

"Go on......"

"Continue? That's all, of course, with the signing of the contract, that's not all......"

(To be continued.) )