In China, when manufacturing airplanes, you can get the final assembly by standing on a stool, and you can climb up and down, but here, if you assemble the Su-27, it will definitely not work.

How big is this plane? It's almost at the level of a fighter-bomber! Scaffolding, around the aircraft, a station, the front nose has a one-story height scaffolding, so that you can stand there, the nose of the part of the assembly, on both sides, the scaffolding is two stories high, so that standing on it, you can get the cockpit!

In this way, it looks spectacular enough. The skin of the body is also already assembled, and it is yellow, which looks strange.

Last time I came, I had already seen the MiG-29 factory, and compared with the Su-27 factory, the MiG-29 was obviously a circle smaller, and when everyone went around to the back, they also began to study the engine in the tail.

"Our fighter is using the AL31 engine of the Salyut factory. With a maximum thrust of 12 tons, this engine is the most reliable engine in the world. Simonov said.

The Salute factory of the Rurika Group, mainly for the production of aerospace engines, but also the production of aviation engines, for this engine, they are also tossed for many years, from 1973, until 1985 to be qualified, began to produce and assemble in large quantities, without this advanced engine, can not meet this outstanding fighter ah.

Thrust 12 tons, used on their own J-10, that is the best, this visit, Song Lao still did not come, for Song Lao, the most important task now is to build a metal prototype, J-10 project is all he has.

As for what engine J-10 uses, he is now also obedient to the arrangement of his superiors, if he really wants to use the AL31 engine, then he will seriously consider the matching, even if this will lead to major changes to the fighter.

This engine appeared in Qin Feng's eyes, Qin Feng was quite obsessed with it, how high the technical content of the engine is, just look at how many products it has, so far, only the United States and the Soviet Union have high-thrust engines in the world! All engines in Europe are medium thrusts with a thrust of seven or eight tons, and research and development are large, which only the most powerful countries can do.

"If we import this kind of aircraft, then we must import a certain supporting engine, what is the life of this engine?" General Lin asked.

The Air Force is the main user, and it must have a clear understanding of the equipment, and this time I came to understand the equipment, according to the consistent impression, the life of the Soviet fighter engines is very short, and in this way, during the whole life of a life, the engine must be replaced several times, which is also a big cost.

Compared with the initial purchase cost, the West pays more attention to the whole life cost, and many of their engines have a life of more than 1,000 hours, or even 3,000 hours, which is the same as the life of the body, so as to save a lot of later maintenance costs.

There are different understandings of the life of the engine, in wartime, the plane may be shot down in dozens of hours, and it is useless if the life is too high, but in peacetime, frequent replacement of the engine will bring a heavy burden.

"Now the engine has a life of 300 hours, but Salyut will soon increase it to 500 hours." Simonov said.

For the Soviet Union, 500 hours of life is already very good, and it does not mean that after 500 hours it will not be able to fly, after 500 hours, the engine will go to the overhaul plant, completely disassemble and repair, replace those worn parts, check whether each blade is intact, this is the overhaul of the engine, after the overhaul, you can fly for another 500 hours, so that the total life will be a thousand hours.

"It's too short." General Lin said: "If we want to purchase this kind of aircraft, then we must purchase a supporting overhaul plant. ”

If there is no overhaul plant, then it will be controlled by others, and when the engine flies to the end of its life, it will have to be sent to the Soviet Union for overhaul, and if the international form changes in the future, and relations with the Soviet Union are stiff, then the Soviet Union will not overhaul it, and the aircraft will be scrapped.

General Lin also tried hard to suppress his impulses, and did not say anything about the introduction of engine manufacturing plants, after all, the current Su-27 is only purely imported, and there is no talk of introducing production lines, since there is no introduction of production lines, of course, there will be no introduction of engine production lines.

In the past, each introduction was matching, the airframe and the engine were introduced together, and now, it is a future project, but now, it must be negotiated first, that is, the engine overhaul plant!

Although there is a great step in the overhaul and production of the engine, but, step by step, through the overhaul of the engine, you can also accumulate the experience of the third-generation engine, which is definitely good for the country, and this is also a very normal requirement.

"We can't call the shots on this, and we still need an answer from Moscow." Simonov said.

General Lin can speak fluent Russian, and the communication with Simonov is very smooth, and there is no need for a translator, but Qin Feng is not good, I don't know what the two are talking about, they are grunting, but they can guess that they must be talking about the engine.

The engine is the crown of the aviation industry, and the domestic research and development of turbofan ten is very difficult, and if you want to make the J-10 fly, it is best to introduce this kind of engine.

Of course, like Tu Lao's problem, the casing of this engine is on top of the engine, and the J-10 is a single-engine aircraft, and maintenance is carried out from below, so the design of the casing must be modified, and these are things for later.

Now, let's look at the Su-27, this plane looks too tall. What would it feel like if you sat on it?

"We see that there is a tail vertebra in the middle of these two engines, what is this tail vertebra for?" Qin Feng raised a question.

The MiG-29 does not, its tail is two engines placed in parallel, and the Su-27 fighter, between the two engines, there is a protrusion that extends backwards, this bulge is like the tail vertebrae of a vertebrate, and if you look at it from a distance, it looks like the hook of a bee.

What is this device for? It doesn't just mean to have a proper space to parachute it, right?

Simonov frowned, sure enough, the question raised by the other party was very professional, and even said that it involved confidentiality, but now, this aircraft is already a mature aircraft, and these designs will eventually be dissected by the outside world, so now it is nothing to tell the other party.

"This tail vertebra serves two functions." Simonov explained.