Just judging from the current data and structural design scheme, the core machine project is actually not much advanced.

Compared with the F404, the new core machine avoids the fear of heights, and the maximum total temperature of the turbine has increased a little; Compared with RD33, the advantage is not too obvious, but the first-stage compressor is missing, and the weight of the entire core machine is controlled.

It seems that this engine is more advanced than F404 and RD33, and it seems that this is a world-leading core machine, and the subsequent military reasoning based on this should be more advanced than these two engines.

But this advantage is not obvious, you a mid-push core machine developed at the end of the eighties, when you come up with a complete military mid-push engine, it must have been the nineties, think about an engine that can only be finalized in the nineties, and take it compared with the two models finalized in the seventies.

If this is the case, you can't break through and increase the performance compared to others, then you really don't live, what's the point of investing so much money and waiting anxiously for so long?

To put it bluntly, when the nineties came up with a complete military push, the generation gap came out again, and what happened to the international military aviation engine in the nineties?

It's not much: the most awesome is F119, which is definitely a proper generation difference, maybe some people want to quibble that it's just a big push, and it's not an order of magnitude with the middle push, and it can't be compared.

Well, let's take a look at the situation of the push: in the nineties, GM launched a deeply improved model of the F404: F414, with a thrust of nine tons and a thrust ratio of more than 9; Europe has come up with an even more awesome artifact: the EJ200. The status of this engine in the military thrust engine is the same as the status of the F119 in the military push, and it can definitely be regarded as a fourth-generation aero engine.

Think of these. Yang Hui does not think that the new push core machine is the core machine that can really reach the international cutting-edge level. Even if it can be half a generation more advanced than F404 and RD33, it still seems a little backward in the face of F414 and EJ200.

The progress now lies in finally bringing the development method of the aero engine into the right way, which is definitely a historic breakthrough, and from this point alone, the new mid-push core aircraft is definitely a successful core aircraft.

For this reason, Yang Hui did not hesitate to praise his words: "It's rare, as far as it seems now, this core machine is enough to compete with all the core machines in active service in the world, F404, RM12, RB199, RD33." These engines used to be our drooling existence, but now we can proudly say: foreigners have, even if we don't have it now, we must have it, we will eventually have it! ”

I have been working hard to call each other, and I have been working hard for many years in scientific research, isn't it just to have my own advanced push core machine? Now the light is at hand, and everything is finally realized.

Wu Lao also sighed a lot at this time: "Yes, we have to have what we should have." Now let's see how the full power performance of our mid-push core machine is, if it is, my old man will not be in vain! ”

The entire core machine was designed by 624, but this time, the chief engineer of the core machine was not related to Jiang Hefu in the previous face. The current general design has been changed to Wu Zhonghua, Wu Lao Kangding, as the chief engineer, Liu Daxiang, Liu as the chief engineer, and the entire core machine project has not only accelerated the speed. The quality is also much better than the previous one's push core machine.

Complex mechanical projects are not only designed but also manufactured. As many as 21 large-scale scientific research institutes are involved in the manufacturing of the entire core machine: Southwest Science and Industry is responsible for most of the manufacturing projects, and its 460, 170, 100 factories and titanium alloy processing bases are also involved.

However, it is not simple to select any of the other units selected by the Southwest Science and Industry: the arc end gear is provided by the Hongqi Factory, and the casing is manufactured by the Jinguancheng 420 Factory. The 621 Institute of Beihang Materials is also deeply involved in the project because of the use of high-temperature materials, as well as the 625 Institute of Beihang University, which is specially responsible for the research of precision machining technology of aero engines in the Republic, and Deyang No. 2 Heavy Machinery Factory has manufactured compressor discs and turbine discs with the unique large-tonnage press in the entire southwest region.

There are various other scientific research institutions involved in the development of the whole engine, these are not introduced, in general, the development of the whole project is actually a typical product of the general battle, of course, if you insist on adding a foreign name to the general war system: "division of labor and cooperation, merit-based bidding" can also be regarded as this meaning.

When the chief designer Wu Lao said that he was ready to start the full-power test run of the core machine, a group of people in the black pressure were excited, this time the test was different from the test run in the previous two months, this is definitely the most test of people's endurance.

Chief Engineer Liu calmed down at this time: "There is nothing to be nervous about, we have the test foundation of the previous month, the cold suspension and the first-order critical speed are all a success, the whole core machine is running well, the vibration is small, and the exhaust temperature is normal, there will not be too many problems, everyone can rest assured." ”

Chief Engineer Liu's words of relief seem to be confident when outsiders stand up, and there is no need to bear the follow-up test at all, but the problem is that all the people who participated in the ignition test of the core machine this time are professional insiders, and they all understand that the previous tests are only pediatrics.

The previous tests alone do not reflect any problems, and the tests to be done now are to be prepared to be directly installed on the high-altitude platform test, which is completely different from the ground bench test in the early stage.

The ground bench test is generally only used to test whether the structural design of the core machine is qualified, and when the ground bench is tested, the inlet pressure of the compressor of the core machine is generally 0.35-0.45MPa, and the inlet temperature of the compressor is only 430-460K. This test does not reflect the core performance at all.

Only now to prepare for the start of the high-altitude platform test is the key point, through the SB101 high-altitude platform simulation, can effectively test the performance of the entire core aircraft in the air.

The inlet pressure of the core machine in the high-altitude test will increase significantly, the lowest is 0.56MPa, and the inlet temperature will also increase to more than 600K.

Let's ask which professional will not sweat hard for this, which is at least more than 40% worse than the working environment data of the ground bench test, and only after passing the full-power high-altitude simulation test can we say that the initial peace of mind.

Signaling everyone to wait quietly, Chief Engineer Liu asked the high-altitude platform testers on the side to come forward, carefully put the special cart on the core platform, and under the congratulations of everyone, the core machine was taken out of the room and walked to the outdoor high-altitude platform simulation cabin.

When the door of the huge high-altitude warehouse is opened, the secret linen is revealed, and its complexity is definitely far greater than that of the self-proclaimed aero engine of industry, and everyone is dazzled by this alone.

As the core machine was hoisted up and placed firmly in the test chamber, only then did the testers climb the herringbone ladder and connect the various necessary pipelines to the core machine to be tested.

Half an hour of various joint debugging although boring, but no one showed any dissatisfaction, this kind of test of course to be cautious, if there is something wrong in the test, to say that the core machine test data can not be collected in time, to say that the core machine is broken, or even the entire high-altitude warehouse is broken, then it is a big thing.

This does not allow everyone to be careless, and the test will not begin until the person in charge of the joint debugging test has checked various matters and signed a issuance form that can start the test.

"Let's all wait on the side, the test will start soon, the test will last about half an hour, and everyone will wait patiently on the side during this time."

After saying that, the whole set of analog aerial platforms began to operate, all kinds of turbomachinery were running rapidly, and even the always powerful current seemed a little inadequate, and this set of equipment consumed too much energy. (To be continued.) )