Chapter 1150

"Generation four The real fourth generation helicopter? "

After listening to Zhuang Jianye's words, others were still at a loss, but the military leaders who had been dealing with equipment for half a lifetime pondered and said: "compared with the previous generations of helicopters, the fourth generation of helicopters have made great progress in materials, power and avionics. The power of the direct-8max that you Tengfei group cooperated with CIDU helicopter factory should not be bad, and the materials should not be asked The problem is that avionics may be a little worse than foreign countries, but it's barely enough... "

The military leaders are really experts in the field of equipment. When it comes to the advantages of helicopters and various manufacturers, it can be said that they are very rare.

In fact, it is true that Tengfei group does not lack materials, power and technology in helicopter, but lacks experience in system integration. Therefore, cooperation with CIDU helicopter factory can make up for this disadvantage.

Take the current zhi-8max for example. It uses two wd-63zb turboshaft engines with a power of 2484 kW, equivalent to 3377 shaft horsepower.

The engine is based on the wd-63z high-power turboshaft engine of the zhi-8plus heavy helicopter. The two-stage high-pressure compressor and one-stage low-pressure turbine are removed and the noise suppression function is added.

Of course, in other countries, a special helicopter used at sea with a turboshaft engine of 1800-2000 kW is enough. After all, the maximum lift limit of this kind of naval ship borne helicopter is 3500 meters. After all, it is used for low altitude anti submarine helicopter, and it is useless to fly high.

But there is still a Qinghai Tibet Plateau with an average altitude of more than 4000 meters in China. Who dares to guarantee that the future zhi-8max will not be able to go from sea to land, and will be able to match the height of its sibling zhi-8plus heavy helicopter to become a flying light riding on the plateau?

As a result, Tengfei group is very stubborn to equip the zhi-8max with a more powerful turboshaft engine.

Not only that, Tengfei group has made great efforts in the materials of zhi-8max.

In the past, even if composite materials were used in helicopters, they mainly focused on the secondary load-bearing structures such as skin and floor. The main load-bearing structures such as frame and truss still used metal materials such as aluminum alloy and even steel.

Even the zhi-8plus heavy-duty helicopter has not escaped from this pattern, and the use of composite materials has not exceeded 25%.

However, by the time of zhi-8max, the proportion of composite materials has suddenly increased by 55%. Not only composite materials are used for skin and floor, but also high-strength carbon fiber composite materials developed by Tengfei group are used for box frame as main bearing structure.

In other words, apart from being unable to use composite materials due to technical reasons, the rest of the places where composite materials can be used are also declining.

The reason for such a large-scale use of composite materials is not that Tengfei group wants to show off its cool skills and announce to the world how NB Tengfei group has in composite materials.

But as a last resort, we have to increase the use of composite materials as much as possible.

No way, who let the first priority of the zhi-8max is to use it as a naval ship borne helicopter.

The high salt and humidity on the sea are naturally corrosive to equipment. If the general metal is not treated specially, it will not last long. Compared with it, composite materials have natural advantages in corrosion resistance.

In addition, the domestic anti-corrosion treatment technology of special metal surface is not up to standard, so after a trade-off, Tengfei group still chooses its own better composite materials to deal with the anti-corrosion problem of the body.

In this way, the zhi-8max, which has the highest proportion of composite materials in domestic aircraft, has been created.

At the same time, this also brings a bad consequence, that is, the configuration of the engine and materials is too high, resulting in a sharp rise in costs.

In addition, the complex processes involved in the special processing of 2500 kW vortex shaft and large-scale composite materials further push up the high cost.

As a result, the unit price of a fully equipped shipborne anti submarine zhi-8max has reached 528 million yuan, almost twice that of the zhi-8plus heavy helicopter.

The unit price of zhi-8max senior VIP "Marine Corps No.1" created for high-end people has reached a record 900 million yuan, which is even higher than that of yun-18nb.

Of course, Zhuang Jianye didn't tell the big leaders about the price. Otherwise, they would definitely say that the biggest thing about zhi-8max is that it's quiet. It's expensive!

In order not to let the vulgar thing like money hinder the take-off group from embracing the high-level, Zhuang Jianye's face is not red and heart is not beating. As for whether it will make the big leaders speechless in the future, it's none of his business.

Anyway, the thigh has been held, want to throw? No way!

But then again, even if we let the military leaders know that the zhi-8max is expensive at this moment, the military leaders at this moment don't have the heart to say anything, because after a review, the military leaders have been shocked by an idea in their hearts, so that they frown and murmur inconceivably: "it should be impossible But if not, how could it be called the fourth generation But if it's the fourth generation, it has to... "Then he looked up at Zhuang Jianye in an inconceivable way and asked uncertainly, "don't you have mastered the core technology of flexible hub?"

In fact, Zhuang Jianye would like to say that they have mastered the more advanced generation of bearingless hub than the ball flexible hub, and have applied it to the zhi-12 verification machine.

If it's someone else, Zhuang Jianye will have the courage to rely on the bearingless hub. As long as he can get more money, how to be advanced and how to come has become the rule of the industry. Zhuang Jianye is not a saint. Why can't he choose the advanced if he can get more money?

The problem is that the military leaders in front of them have engaged in equipment for most of their lives. Zhuang Jianye doesn't believe that such people will not know that due to the material characteristics, bearingless hub can only be promoted in light helicopters. Due to the large swing torque of large and heavy helicopters, there is no composite material that can withstand, so even if they want to apply it, they can only continue to use it The traditional hub structure is used.

For example, the Zhi-8 plus heavy helicopter uses the all metal articulated hub of the old Zhi-8 model.

Not only the structure is complex, but also the noise is very loud. Because of this, the zhi-8plus heavy helicopter can only stay in the category of the third generation helicopter, which can be regarded as 3.5 generations at most.

Because the hub of the fourth generation helicopter, especially the fourth generation large or heavy helicopter, is no longer a complex all metal hinged or semi hinged hub, but a kind of spherical flexible hub with a large number of elastic materials.

It is obvious that the leader of the military can say the word "spherical flexible hub", which means that he is very clear about the difference and application scope between bearingless hub and spherical flexible hub.

Therefore, Zhuang Jianye could only lament in his heart that he would lose at least $200 million if he met a knowledgeable leader, but he was still quite excited to compliment the military leaders: "the leader is really powerful. At a glance, you can see that zhi-8max has applied the ball flexible oar hub, powerful ~ ~ powerful ~ ~"

however, the military leaders ignored Zhuang Jianye's compliment, but with a few words With a look of excitement, he stepped forward, his voice trembled and continued to ask, "so, you have broken the elastic bearing technology?"