If it is said that the sight of the broad-chord titanium alloy fan blades with forward-swept and backward-swept profiles like the Rolls-Royce "Trenta" series turbofan engines makes Djokovic like a little otaku with a broken melon, and the excitement cannot be greater.

Djokovic, who saw the "Z" structure inside, was completely excited to explode on a large Yanpony.

I really almost rolled my eyes and went straight to see those Soviet sages.

After a long time, I finally returned to the world, and then I couldn't take a breath and stabilize for a while, so I pointed to the "Z" structure in the model and asked urgently: "How did you make this structure?"

As soon as these words came out, those executives and experts in the Russian aviation industry, who were originally worried that Djokovic had three longs and two shorts, turned their hopeful eyes on Liu Cong.

That's right, how did this "Z" shape structure arranged in the internal cavity of the Ascendas Group come about?

You must know that the Soviet Union and later Russia have been studying this for seven or eight years but have not made any progress at all, and looking at the world, only two countries, Britain and the United States, can really make this kind of structure, and there is absolutely no semicolon in addition.

There is no way, in fact, the titanium alloy "Z" structure used as a support inside is not a traditional honeycomb structure, but a hollow truss structure, similar to the beams in traditional houses, with a large number of hollows in the middle of the frame.

In layman's terms, it is to use a titanium alloy hollow beam as thin as a hair to support two outer blades that are also titanium alloys.

The principle is similar to the honeycomb sandwich structure of the previous generation, but the processing and manufacturing are very different.

After all, the honeycomb structure is a whole, and the corresponding overall plasticity can be carried out according to the requirements, and as for the connection method, it can be completed by high-grade vacuum brazing or electron beam welding.

Overall, it's not that complicated.

However, this method is not played in the "Z" structure, firstly, this structure is not a whole, and secondly, the titanium alloy wire used to support the blades is extremely fine, and it cannot withstand the high temperature caused by any welding method.

If it weren't for that, with the Soviet Union's advanced attainments in welding technology at that time, the "Z" structure would have been solved long ago, so why wait until the disintegration and not understand what was going on?

So this is a difficult problem not only for Djokovic, but also for other Russian executives and experts.

Although Liu Cong is no longer the half-baked electrician he was when he was in the 23rd Factory, he is essentially the honest man who personally went down to the river to fish and invited Zhuang Jianye to his home.

Seeing Djokovic's excitement, he almost went crazy immediately...... Phew~~ I almost went to see the sage, Liu Cong felt a little unbearable, so he weighed it a little and said, "Eh...... The Z-shaped structure in our fan blades is made using a method called super-molding-diffusion joining process. ”

"Super-shoning-diffusion joining process?" Djokovic's eyes narrowed unconsciously when he heard this.

Liu Cong nodded without hesitation: "That's right, it's the super-Shuo molding-diffusion joining process......

As he spoke, Liu Cong introduced the high-tech manufacturing process of Tengfei Group.

It turned out that Tengfei Group had mastered this technology as early as three years ago, but it was not applied to the manufacture of fan blades of turbofan engines at that time, but to a certain anti-ship missile.

Because the missile uses the WD-16P small turbojet engine produced by the Tengfei Group to replace the original rocket engine, the overall aerodynamic layout of the missile has to be changed, but in order to save money, the navy requires the new anti-ship missile to continue to use the old model of the launcher and storage device.

This requires that the overall size of the new anti-ship missile should not exceed that of the old model too much, and in particular, the diameter of the missile body must be determined in accordance with the upper limit of the Navy's existing launchers and storage devices.

This is difficult for the chief designer in charge of the new anti-ship missile, because the anti-ship missile equipped with turbojet power is different from the previous model of rocket thrust, which needs the surrounding air to support combustion, so there must be an air intake channel for air injection on the missile body.

According to the traditional design idea, a rectangular bulge will be set under the missile as the entrance to the air inlet for the turbojet engine to work normally.

The problem is that the diameter of the missile will significantly exceed the ceiling of the Navy's existing launchers and storage devices, which does not meet the requirements of the Navy.

Switching to a retractable air intake was technically possible, but the cost skyrocketed, far exceeding the Navy's budget.

In desperation, the chief engineer of the new anti-ship missile simply copied the layout of the air intake of the American "Harpoon" anti-ship missile and designed a titanium alloy air inlet with bilateral inner pipes.

In this way, the air inlet is almost the same as the missile body, but the opening edge is slightly higher than the missile body, so that the maximum range of the new anti-ship missile can reach 150 kilometers under the condition that it meets the requirements of the navy.

However, the design is very perfect, but the implementation in practice has made the development team all kinds of hair.

The titanium alloy inlet of this double-sided inner pipe is good, but the key is that it is not easy to make it, first of all, it is necessary to control the weight, not too heavy, otherwise it will cause the center of gravity of the entire missile to move back, resulting in the missile being launched to become a large drill monkey.

Secondly, the structural strength must be good and be able to withstand at least large overload impact.

Finally, it has extremely strong corrosion resistance, after all, it is a naval equipment, and it cannot be too delicate in the sea environment with high salt and high humidity.

In this way, the design team referred to the American harpoon and proposed an integrated molding scheme.

But the problem is that looking at the whole world, the only country that can make a "Harpoon" that integrates the air intake tract with the missile body is the United States, and the rest, including France, has one anti-ship missile equipped with a turbojet engine, and there is no air intake that does not protrude outside the missile body.

There is only one reason for this, and that is that other countries do not have the cutting-edge manufacturing technology of the United States, and even if they can design it, they will not be able to build it at all.

In the face of this situation, the new anti-ship missile development team at that time said that it was not desperate, but it was false, but that the dead horse was treated as a live horse doctor and ran around in various domestic manufacturers to see if it could find a so-called miracle.

As a result, this search was really found from the engine provider of anti-ship missiles, Tengfei Group.

At that time, in the supporting project of the No. 10 project in which Tengfei Group participated, the supporting production products of the vertical tail spar and the No. 3, No. 12, No. 27 and No. 28 reinforced wing ribs had just been brought back by the chief engineer of the No. 10 project.

There is only one reason: the technology is too advanced and does not meet the requirements of domestic large-scale production.

At that time, Zhuang Jianye's heart of the MMP mentality not to mention, you must know that for these components, Tengfei Group almost pressed carbon fiber, aramid fiber at the bottom of the advanced technology on the bottom of the box, but it got such a comment, no one will feel good.

But the problem is that there is no way to feel uncomfortable, military equipment, especially the main battle military equipment of the future air force, must always have a balanced relationship between advanced nature and large-scale production, otherwise once the war end is opened, large-scale production is required, and it turns out that those high-end materials are not available, so don't you be dumbfounded?

Therefore, the chief engineer's request is reasonable, so Zhuang Jianye gritted his teeth and endured it.

However, before Zhuang Jianye could adjust it, the new technical indicators of the No. 10 engineering chief engineer made Zhuang Jianye rampage again, and the requirements for large-scale production were not forgotten, and the new product standards should maintain more than 85% of the combined performance indicators of carbon fiber and aramid fiber.

With materials that can be mass-produced, it reaches the level of 85% of the top high-end aviation materials, and more!

Is this a man-made plane? It's just forcing people to hit their heads against the wall!

So after receiving this new technical standard, Zhuang Jianye carried a bottle of two pots on the roof of the Tengfei Group building, poured half a bottle, and scolded in the direction of the East Sichuan Plain for more than two hours, and then went downstairs in a comfortable mood.

And then...... Then the super-molding-diffusion joining process was forced out under the weight of the No. 10 chief engineer.