Super military empire

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"There are too many mad scientists, which is a good thing. There are still too few mad scientists in our country." Liu Yijiu didn't think there was anything wrong with these mad scientists.

On the contrary, he felt that only the emergence of mad scientists can the technological level of a country advance by leaps and bounds.

The Soviet Union has so many crazy scientists that it has the appearance of Caspian monsters, nuclear energy aircraft, huge offensive nuclear submarines, and a series of black technologies such as condensation-to-nuclear reaction batteries.

These things allowed Lao Maozi to deter American imperialism for decades after the collapse of the Soviet Union.

"Crazy, can your funds support it? Your fighter's engine has a problem again..." Many of Liu Yijiu's projects are because of madness. As a result, it is just a copy and it has to be changed.

Until now, no finished products have come out.

Hearing Long Yaohua's words, Liu Yijiu frowned, "Didn't our engine say that it has been tested on the aerial platform?"

"After flying for more than 20 hours, something went wrong." Long Yaohua sighed.

Liu Yijiu's mouth twitched when he heard this.

"Chief, should you help me communicate with the Ministry of Aerospace Industry for the engine project? Obviously, it is not possible to have scattered technical research. It must be brought together. This can be cooperated with them. Okay, it’s okay on our side, but I think even on their side, it’s better to be in Rongcheng.” Liu Yijiu's heart is already anxious now.

The turbofan six succeeded, but the engine with a larger thrust-to-weight ratio, the turbofan eight, has been studied for many years.

This must have been happening for a while, otherwise Long Yaohua would not tell him at this time.

There is no way to solve even an aero engine, so how to solve the plug engine that the Americans have not solved in the first two decades of the 21st century?

"Are you going back in a hurry?"

"Can I not go? The panda prototype has an American engine, but we can't just fly a prototype." Liu Yijiu is also a big head.

Domestic fighter jets are actually bad engines.

Only two f14 Panda fighters were obtained from Iran. There were only four engines in total. One was training pilots, and the other had been dismantled for research. The engines were used for the first flight and test flight of the prototype.

Once a problem occurs, there is no follow-up.

It is impossible for the Soviet Union to export al-31 engines to China.

Similarly, Americans are less likely to export engines to China.

For the single-engine J-8II fighters that are not advanced in performance, the Americans end up dragging them.

Liu Yijiu quickly returned to Rongcheng and ran directly from the airport to Factory 132. On the way, he listened to the work report of Qi Hai, the chief designer of the engine.

The turbofan eight used for the f-14 Panda fighter that has been disassembled and assembled many times, the results of experiments on the ground test platform were very satisfactory, but problems appeared after the sky.The main manifestation is that problems will be discovered after flying. The main manifestation is that the welding of important parts of the engine cannot maintain stability during high-speed maneuvering of the fighter, and the phenomenon of weld cracking occurs.

"Have you found the reason?" Liu Yijiu frowned and asked.

The ground test platform is very different from the air test platform.

Moreover, for the convenience of testing, the engine and the fuselage were not completely covered with skin during the aerial test platform.This makes it easier to find engine problems.

"I found it, but the welding process we adopted was not good..." Qi Hai looked at Liu Yijiu with some embarrassment."During the welding process, the titanium alloy will be oxidized and deformed during the high temperature welding process..."

"Isn't the argon arc welding used during production?" Liu Yijiu has never paid attention to this issue.

Because the engine research project team has never raised this issue.

I'm usually very busy, and I don't have much time to understand the specific production process.

The domestic technology foundation is too poor. Any project basically starts with the most basic supporting equipment, materials, manufacturing processes, and even equipment.

If Liu Yijiu had to do everything by himself, a hundred Liu Yijiu would not be enough.

"Argon arc welding? We use this welding process. We use argon gas for protection and then weld. However, there is still oxidation. The air platform on the test flight has a slightly larger motion range, which will cause problems." The domestic titanium alloy is not a costly material in the Ninth Institute.

Moreover, with the emergence of titanium alloys, the processing problems of titanium alloys are in front of many technicians in the third zone.

Whether it is cutting cold processing or welding hot processing, various technologies are constantly being researched.

Liu Yijiu once mentioned that under the protection of argon, the welding of titanium alloys will not oxidize, and their titanium alloys have been used for such a long time, and there has been no quality problem.

The appearance of such a thing now makes Liu Yijiu a little big head.

I didn't ask anything along the way. In the engine assembly workshop of the 132 factory, Liu Yijiu saw the engine with cracked welds.

It is not only the weld between titanium alloys that has problems, but also the welds of high-temperature alloys.

When Qi Hai was observing Liu Yijiu, he introduced the working hours of each engine and various parameters of the fighter when there were problems.

After the observation, Liu Yijiu did not say anything, but directly used the process documents to determine the process production route.

After questioning the assembly technicians and investigating the entire production process, it was discovered that the argon arc welding process used in the production process is conventional argon arc welding, that is, directly during welding, through the argon gas installed in the compressed gas tank. Protect the melted welding material to perform welding.

When thinking about the production of al-31 engines by umpo, a subsidiary of Russia’s United Engine Group, in order to ensure the integrity and accuracy of the welding of engine components, all key welding points of the components are welded in the "atmosphere-24 "In the pressurized cabin, manual welding is performed by workers.

The "Atmosphere-24" pressurized cabin is the largest pressurized cabin in Russia. In 1981, Umpo manufactured this pressurized cabin at the Prometheus Institute in Leningrad, and it was mainly used for the production of supporting Su-27 Engine al-31.

However, China does not have such a pressurized chamber.

Turbofan 8 is not al-31, but the production process is basically based on this.

After all, the first engine used in the domestic J-10 was the al-31 imported from Russia, and the domestic engine was not used until the turbofan X was fully developed.

"Designing and manufacturing a pressurized cabin that can reach two atmospheres can solve this problem? If it can really solve this problem, will Simon Love not propose it? He is the chief designer of Su-27, it is impossible not Understand this situation..." Qi Hai didn't believe too much about Liu Yijiu's statement.

The argon arc welding technology has been used for such a long time, and there has never been such a problem.

"Did you let Simon Love intervene in this matter? What's more, all he wants is the engine. He is an airplane designer, not an engine designer!" Liu Yijiu did not pursue these matters too much.

Simon Love has now fully devoted his time and energy to the design of the new Giant Panda J-10 fighter.

The test flight is the imitation f-14.

"The al-31 engine is indeed produced in this way, especially the welding process. Almost all the key components are welded in the pressurized cabin. Other welding methods cannot compare the quality at all..." When Liu Yijiu asked about the welding process used by Su-27, Simon Love did not hesitate to tell everything he knew.

If Liu Yijiu hadn't been with him since getting off the plane, Qi Hai would even suspect that the two had colluded.

"...The pressurized cabin is divided into a working area and an air lock. The welding workers put on protective clothing connected to the outside of the air pipe and pass through the first door to enter the air lock, then close the door and inject argon into the air lock. After the sluice was filled with argon gas to reach pressure balance, the welding workers would weld again..." Although Simon Love did not know the details of "Atmosphere-24", Liu Yijiu knew it clearly.

The al-31 engine is very familiar to anyone in the Republic who has research on aviation equipment.

A lot of information can be received online.

Liu Yijiu and the others are very familiar with these technologies and even the entire engine production process.

Therefore, under his personal responsibility, the 611 Institute started the design of the pressurized cabin.

This kind of work is the first time for 611, but with Liu Yijiu's participation, the design work proceeded very quickly, and the plan was put out in just over ten days and put into manufacturing.

While waiting for the pressurized cabin production process, Liu Yijiu asked the special clothing design unit of the Ninth Hospital and Eight Districts to design and produce the protective clothing connected to the ventilation pipe. He provided a preliminary plan and then began to sort out what he knew. The production process of al-31.

Especially the production of each key link and the matters needing attention.

It lasted for more than 20 days, until the pressurized cabin was produced, the process was completely straightened out.

He did not put the production process into production for the first time. Is the problem with the turbofan-8 engine because of this? As long as the experiment is carried out, the results will be obtained soon.

If there is no problem, there is nothing wrong with putting it into the production process.