(Add 19/20 for @driden)

When they were about to give up, they went back to study the Boeing 707 tanker and were preparing to imitate it, the Ninth Academy proposed to combine the 708 large civil aviation aircraft, the 603 military transport aircraft, and all their Qin Fei's power to create a 200-ton multi-purpose transport aircraft with technical indicators like the original Yun-9.

If the research is successful, it will be relatively easy to transform whether it is a civil aviation passenger plane, a military transport plane, aerial refueling plane, etc.

For the two hundred tons, the carrying capacity must exceed 40 tons.

"Everyone knows the performance indicators. I personally think that the appearance can be referenced to the Soviet Il-76 military transport aircraft, but in this regard, we need to have our own design ideas. We conduct technical demonstrations in advance and list the required technology list one by one. Whether it is materials, electronics or various foundations lacking in production and manufacturing, we will carry out reverse research one by one!" The people from the three units finally sat together to discuss the development of a 200-ton large aircraft.

Liu Yijiu remembers very clearly the technical performance and various detailed designs of the Y20 project that was studied in China after entering the 21st century, but he did not take it out directly here.

After the development of the Yunshen 708 Institute, Ma Fengshan and Cheng Bushi and others began to study the new generation of research. They already had preliminary ideas, but these ideas did not become drawings. During the process of plan demonstration, after several units discussed it, Liu Yijiu would put forward some opinions at the right time, so that Yunshen could appear in the Republic decades earlier.

"Director Liu, although it is easier to say, whether it is design ability or production and manufacturing ability, the technical foundations of our companies are much worse..." Other countries are studying more advanced weapons and equipment when their industrial foundation has reached its level.

The Republic is not good, the foundation is too poor.

Liu Yijiu directly proposed to use good steel on the blade, first take out the design plan, conduct technical demonstration, what kind of industrial foundation is needed, and then invest in related technical research and development.

This is also impossible.

"No need to make these plans. We will provide technical upgrades. Of course, you need to solve these financial problems yourself. Just the preliminary technical demonstration requires a lot of funds..." Liu Yijiu did not argue, but told them that if they want to continue in cooperation, they must upgrade their supporting facilities themselves. The Ninth Academy can provide them with upgraded technical equipment, but will not provide funds.

"The biggest problem is the large press. We do not have a 45,000-ton forging machine tool. We must reach a cruising speed of more than 800 kilometers per hour, and the overall maximum take-off weight reaches 220, which puts higher requirements on the structural strength of the entire aircraft..." Qin Fei has been studying and has a certain understanding of the strength or aerodynamic layout required for the body structure. "Especially the engine with a large bypass ratio..."

Tens of thousands of tons of free forging machinery are the shortcomings of the Republic, and the one that also concentrates the cutting-edge power of the entire country's machinery manufacturing.

The largest hydraulic press in China is in the Shanghai Machinery Factory, and even the main beam of a large aircraft such as Yunshi is very difficult.

Not to mention anything else, casting technology alone is a very troublesome thing.

"The Second Press had already cooperated with us to start a large forging press of 60,000 tons a few years ago. It should be completed in a short period of time, so this is not a problem..." Liu Yijiu was very concerned about the situation of the large press. The Second Press has always had the funds and technical support from the Ninth Hospital, especially in terms of automatic control.

His words surprised others a little. He did not expect that such equipment would be made in China, but he had not heard any news before.

After repeated confirmation, Liu Yijiu assured them with great certainty that the 60,000-ton large press had already begun to be manufactured, just for the production of Yunshi, so that other people could rest assured.

"As for the engine, this is not a problem. Our turbofan-8 can achieve such thrust..." Huang Qiaosong continued Liu Yijiu's words.

"Where is the material?" Since this is the case, what else can I do?

There are so many good things in the Ninth Courtyard, but it seems that there is no intention to take them out without cooperation?

"Materials are a problem, but we have a lot of new materials, and we can only solve the problem when we encounter them during the design process..." Even Liu Yijiu, there is absolutely no guarantee that the materials can be fully supplied.

Materials are just a general category. Different parts and components, even if they are only used, they need several subtle materials.

Not only China, but also countries such as the United States and the Soviet Union with advanced technology dare not boast about materials and say that this is not a problem.

"Director Liu, we cooperate with research and development in three parties. How to cooperate specifically? Should we conduct project division of labor or joint development? Everyone has relevant personnel and technologies for each project?" This is what 603 is most concerned about.

Don’t work with the Ninth Hospital. After they created a large plane, they became supporting units of the Ninth Hospital.

As the first batch of national defense science and technology talents in the Republic, Niu Jing can take it and let it go. Liu Yijiu promised not to poach their talents, and he apologized to Liu Yijiu in public.

Now when the interests of several units were involved, he once again raised the question that Qin Fei also wanted to raise based on the principle of considering 603.

"My personal meaning is that we cooperate with all projects so that we can conduct comprehensive technical exchanges. Of course, some of our technologies will not hide privately, so I also hope that everyone will not hide privately in terms of technology. Only when we make progress together can we make progress in our entire national defense industry..." Liu Yijiu did not think that Niu Jing was wrong with asking this.

He had no intention of using other units, but sincerely hoped that everyone would make progress together.

Only when the overall progress can the country's national defense technology improve.

"Before, due to funding problems, management system reasons, and efficiency, we did it ourselves instead of cooperation. But now, we find that no unit can complete all the work. In this regard, I hope everyone will also recognize this problem and do not only care about the interests of their own units. Progressing together and achieving a win-win situation is our goal." Liu Yijiu said this sincerely.

Niu Jing, Sun Daogan and others were very embarrassed by what he said.

"Of course, during this cooperation process, I hope that our 708 office will still be responsible for, and you both will assist." Speaking of this, Liu Yijiu looked at the people from the other two units, and saw that neither of them had any reaction, waiting for him to continue talking.

He picked up the teacup on the table in front of him and took a sip to hide his inner surprise.

"After all, Mr. Ma has more experience in the research of large jet aircraft. What's more important is that the project review of our Ninth Academy is not as complicated as the country. We are not afraid of wasting money. As long as we use money, we can buy experience and make us grow, it is worth it... The reason why our research and development is fast is because all our projects are piled up with money..." Liu Yijiu's words immediately received warm applause.

The problem faced by their units is lack of money.

All technologies are developed, but without much capital, it is impossible to use money to pile up the technology.

"Director Liu, if our technology cannot make breakthroughs, can we consider introducing some related technologies from abroad?" Introducing technology from abroad is very popular in China this year.

Without waiting for Liu Yijiu to answer, Huang Qiaosong said with contempt, "In the scope of the Ninth Court, no technology will be considered for introducing it from abroad..."

His words made Liu Yijiu's face burn.

But he said nothing.

"The technologies we lack are all high-end and sophisticated technologies that foreign countries monopolize us, so everyone still cut off the idea of ​​introducing them from abroad. Fortunately, we have the most critical engine. If the Ninth Academy had not taken over the turbofan-6 project, our Yun-10 would have been basically done. Westerners represented by the Americans would rather export aircraft to us than give us manufacturing capabilities..." Ma Fengshan warned everyone not to be lucky.

He also knew that these people believed that the Ninth Academy could be introduced from abroad in some complex technologies.

Even though it is now a honeymoon period, the West's top technology blockade on China is still very serious.

What can be obtained is also some behind.

"Independent innovation is what we should do. In the early days of the founding of the People's Republic of China, the Soviet Union withdrew all experts aiding China and burned down technical drawings. Without any foundation, did we also create two bombs and one satellite?" Liu Yijiu emphasized to everyone.

"We cannot buy national defense if we have money. Everyone should clearly realize that both sides of the war between Iran-Iraq War. Before the war, both sides claimed that they were the third largest military power in the world and could not even create bullets and shells. How many years have the war been fought?"

The tone is not very strict, but it is heartfelt.

"We are not afraid of foreign countries blocking us and monopolizing us with technology, because we are Chinese defense science and technology workers. Our task is to make the country's national defense stronger." Liu Yijiu said in a summary, "For our national defense and military science and technology workers, wherever there is blockade, there will be independent innovation. One day, all our technologies will not be expected to be obtained from abroad..."

"Wow wow wow wow..." The applause rang out.
Chapter completed!