"This ...... This...... This ......"

I don't know how long it took, Djokovic opened his mouth and wanted to say something, but he didn't say anything for a long time, no way, the scene in front of him was too shocking.

I saw that the black first-stage fan of the WD-60ML turbofan engine was covered with minced meat and feathers, and even a little blood was attached to it.

Because right next to them, the crews who operated the air cannons were thawing two frozen dead chickens, each weighing about 2 kilograms.

This level has exceeded the safety indicators of most aero engines, at least the civilian engines of the former Soviet Union did not meet this standard.

Of course, this alone cannot shock Djokovic and others so much, after all, the fighting nation has always adhered to the glorious tradition of enough to do, as long as the engine can send the iron lump into the sky, safety is not the point.

The reason why these Russians can't even talk is the number of first-stage fan blades of the WD-60ML turbofan engine in front of them, and the shape of the first-level black blades.

22 pieces! S-shaped rhythm curve!

Together, they have a unique industrial beauty.

However, in addition to this throbbing beauty, Djokovic also saw the excellent performance of the WD-60ML turbofan engine with low fuel consumption, high thrust, low noise and high stability.

You must know that the fan blades of the current general aero engine are more than 36 pieces, and most of them are made of metal, and the number is equal to the weight, but the WD-60ML turbofan engine of Tengfei Group is less than ten fan blades than the traditional engine, what does this mean?

WD-60ML turbofan engine has significant weight reduction.

When the weight comes down, the thrust-to-weight ratio will be higher, and the thrust-to-weight ratio will be high, and the overall thrust will be raised, based on this, along with other performances, the performance of the WD-60ML turbofan engine will naturally rise.

Of course, this alone can only show that the WD-60ML turbofan engine is okay, not excellent, but with the addition of the S-shaped rhythm curve, the qualitative change will be completely underway, because this shape of the blade is more efficient than the previous scimitar-mounted aerodynamic layout, especially in the face of supersonic speed at the tip of the blade, it can more effectively absorb high-speed airflow, so as to create greater thrust for itself.

All in all, in short, Liu Cong didn't say anything big just now, and the WD-60ML turbofan engine of Tengfei Group is really good, so the executives and experts in the Russian aviation industry who were clamoring before were dumbfounded, and Djokovic, who didn't know what his old face was, started his performance again.

Coughed lightly twice to alleviate the shocked gaffe just now, then turned his head to look at Liu Cong with a smile, and asked amiably: "How do you make this kind of blade?" Also, what kind of product is the H-ZB800 grade carbon fiber you just said?"

Liu Cong's smile became more and more honest, but there was a sneer in his heart, and he still clichéd, so he was not afraid that I would scare you to death if I said it.

How else do you make it, what kind of product?

The F-22 in the United States is such a urine product!

In fact, as early as seven or eight years ago, Song Yanan of the Institute of Aeronautical Materials under the Tengfei Group inadvertently found in the preparation of carbon fiber composite materials that through different fiber gaps and layout degrees, a miniature mirror reflection effect can be formed through different fiber gaps and layouts, so as to play a certain stealth effect, Tengfei Group has in fact been included in the next generation of combat aircraft supporting pre-research key support units.

At that time, it was still the end of the 80s, and the progress of the No. 10 project was still stumbling, but the superiors had already made a far-sighted plan for the systematic pre-research of the next generation of combat aircraft, and it was from then on that the research and development ideas of the development generation, the pre-research generation, and the exploration generation began to gradually take shape.

It's just that at that time, the overall technology was backward, the scientific and technological conditions were effective, and although some units such as the Tengfei Group had some bright spots, the overall level was still not enough to launch a new generation of combat aircraft.

Even the highlight of Tengfei Group is only a theoretical breakthrough in the laboratory, and it is still far from practical application, not to mention how the fiber array and textile of this material should be carried out, even if it meets the demand, it cannot be installed on the plane.

Because according to the requirements of the new generation of combat aircraft announced by the United States, there is a supersonic cruise, and the heat temperature generated by the friction between the body and the air in the supersonic process of the aircraft is very high, and ordinary carbon fiber composite materials cannot withstand the burning of this temperature at all.

Therefore, in addition to the stealth function of the material itself, the problem faced by Tengfei Group is also the practical problem of applying to the aircraft.

Fortunately, the higher authorities attach great importance to this aspect, especially in the face of the progress of the American F-22 fighter, and have stepped up the pace of pre-research, not only from the smooth progress of the No. 10 project to join the pre-research team, but also continue to increase the investment in the pre-research project.

In the early nineties, Tengfei Group's national allocation for composite materials reached 80 million yuan, which increased to 150 million yuan in 1993, and after a major event in 1996, the research and development fund was increased to 300 million.

In addition, the aviation and aerospace departments, local and military R&D funds have also followed up, coupled with Tengfei Group's own high annual R&D investment, so that Tengfei Group's annual R&D expenditure is not less than 500 million.

After spending money for many years regardless of the cost, at the end of last year, Song Yanan's team came up with a new composite material that can be put into practical application with both high strength and high toughness, and the coexistence of mirror emission and absorption characteristics - 3900-2800 prepreg.

Among them, 3900-2 is the label of epoxy resin in the prepreg, only one of these composite materials has ultra-high toughness, and the use of epoxy resin is indispensable.

After testing, the epoxy resin of the 3900-2 model has particularly strong absorption properties for mainstream air defense radars such as millimeter wave and centimeter wave after being reinforced at high temperature, and can achieve excellent stealth efficacy with unique fiber arrangement.

As for T800, as the name suggests, it is a T800 level of high-strength medium-mold carbon fiber, which is used to cooperate with 3900-2 epoxy resin to form the main structure of the entire composite material.

With such an awesome thing, the head of Tengfei Group, the king of the aerospace industry, the chosen son of the pretending industry, the naming master, Zhuang Money, Jianye, of course, did not miss this once-in-a-lifetime opportunity, so he hid in the office for three days, and finally made a well-known name for this new material: H-ZB800