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Chapter 1150 Ball Flexible Propeller Hub

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    "Fourth generation aircrafta real fourth generation helicopter?"

    After listening to Zhuang Jianye's words, others were still at a loss, but the military leader, who had been dealing with equipment for half his life, said thoughtfully: "Compared with previous generations of helicopters, the fourth-generation helicopters have better materials, power and avionics.  There has been great progress. The Z-8max that your Ascendas Group and Cidu Helicopter Factory cooperated with should not be bad in terms of power, and there should be no problems in materials. The avionics may be inferior to those abroad, but it is still barely enough  ¡­¡±

    The top leaders in the military are indeed experts in the field of equipment. When talking about helicopters and the advantages of various manufacturers, they are very familiar with them.

    It is indeed true that Ascendas Group has no shortage of materials, power and technology in helicopters, but what it lacks is experience in system integration. Therefore, cooperation with Cidu Helicopter Factory can make up for this disadvantage.

    Take the current Zhi-8max as an example. It uses two WD-63zb turboshaft engines with a power of 2484 kilowatts, equivalent to 3377 shaft horsepower.

    This engine is based on the wd-63z high-power turboshaft engine equipped with the Z-8plus heavy-duty helicopter, minus the two-stage high-pressure compressor and the one-stage low-pressure turbine, and improved it by adding the noise suppression function.

    Of course, in other countries, a dedicated helicopter for maritime use with a turboshaft engine of 1,800 to 2,000 kilowatts would be enough. After all, the maximum ceiling of a ship-based helicopter equipped by this type of navy is 3,500 meters.  After all, it is a helicopter used for low-altitude anti-submarine warfare. It is useless if it flies high.

    But there is no Qinghai-Tibet Plateau in China with an average altitude of more than 4,000 meters. Who can guarantee that the future Z-8max will not be able to travel from sea to land, and will be matched with its brother Z-8plus heavy-duty helicopter to become an aerial vehicle for galloping over the plateau?  Qingqi?

    Coupled with the lessons learned from Ascendas Group¡¯s poor consideration of the Z-12, Ascendas Group is very stubborn in equipping the Z-8max with a more powerful turboshaft engine.

    Not only that, Ascendas Group has also put a lot of effort into the materials of Zhi-8max.

    Even if helicopters used composite materials in the past, they basically focused on secondary load-bearing structures such as skins and floors. Main load-bearing structures such as frames and trusses still used metal materials such as aluminum alloys or even steel.

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

    But when it comes to Zhi-8max, the proportion of composite materials used has suddenly increased by 55%. Not only are composite materials used for the skin and floor, but even the box-shaped frame as the main load-bearing structure is made of high-strength materials developed by Ascendas Group.  Carbon fiber composite material.

    In other words, apart from the inability to use composite materials due to technical reasons, Ascendas Group has not fallen behind in other places where composite materials can be used.

    The reason why Ascendas Group uses composite materials on such a large scale is not to show off its cool skills and announce to the world how great Ascendas Group is in composite materials.

    Rather, we have no choice but to increase the use of composite materials as much as possible.

    No way, who made the Zhi-8max¡¯s first priority to be used as a navy carrier-based helicopter?

    The high salt and high humidity at sea are inherently corrosive to equipment. Ordinary metals cannot resist it for long without special treatment. In contrast, composite materials have natural advantages in corrosion resistance.

    In addition, the domestic technology in corrosion-resistant treatment of special metal surfaces is not up to par, so after some weighing, Ascendas Group chose composite materials that it is better at to deal with the corrosion resistance of the aircraft body.

    In this way, the Z-8max was created, which has the highest proportion of composite materials among domestic aircraft so far.

    Of course, this also brings an undesirable consequence, that is, the configuration of the engine and materials is too high, causing the cost to rise sharply.

    Coupled with the complex processes involved in the special processing of 2,500-kilowatt turbine shafts and large-scale composite materials, the already high cost has been further pushed up.

    So much so that the unit price of a fully equipped carrier-based anti-submarine Z-8max has reached 528 million yuan, which is almost twice that of the Z-8plus heavy-duty helicopter.

    The unit price of the Zhi-8max premium VIP "Marine One" built for high-end people has reached a record-breaking 900 million yuan, which is actually higher than the unit price of Yun-18nb.

    Of course, Zhuang Jianye did not disclose these selling prices to the leaders, otherwise these people would definitely say, the biggest special thing about 8max is that it is quiet, and it is obviously expensive!

    In order not to let such vulgar things as money prevent Ascendas Group from embracing its senior management, Zhuang Jianye pretended that it was not a matter of concern. As for whether it would stun the big leaders in the future, that was none of Zhuang Jianye's business.  .

    Anyway, my thighs are already hugged, do you want to get rid of them?  ?Door!

    But then again, even if the military leaders knew that the Zhi-8max was priced at a high price, the military leaders at this moment would not have the thought to be speechless, because after taking stock, the military leaders had already been attracted by a person in their hearts.  The idea was so shocking that he frowned and murmured in disbelief: "It shouldn't be possible But if it's not like this, how can it be called the fourth generation But if it is the fourth generation, it must"

    Then he raised his head and looked at Zhuang Jianye with some disbelief, and asked with some uncertainty: "Don't you have mastered the core technology of the ball flexible propeller hub?"

    In fact, Zhuang Jianye really wants to say that they have also mastered the bearingless propeller hub, a generation more advanced than the ball flexible propeller hub, and have applied it to the Z-12 verification aircraft.

    If it were anyone else, Zhuang Jianye would probably have the courage to rely on bearingless propeller hubs. As long as he can get more funds, it has become an industry standard to be advanced.  Said?

    The problem is that the military leader in front of him has been engaged in equipment for most of his life. Zhuang Jianye does not believe that such a person would not know that due to material characteristics, bearingless propeller hubs can only be promoted on light helicopters. Large and heavy helicopters, due to the swing  The torque is too large, and currently no composite material can withstand it, so even if you want to apply it, you have no choice but to continue to use the traditional propeller hub structure.

    For example, the Z-8plus heavy-duty helicopter uses the old Z-8 all-metal articulated propeller hub.

    Not only is the structure complex, but it is also very noisy. Because of this, the Z-8plus heavy-duty helicopter can only stay in the third-generation helicopter category, and can be considered a 3.5-generation helicopter at most.

    Because the propeller hub used by the fourth generation helicopters, especially the fourth generation large or heavy helicopters, is no longer a complex all-metal articulated or semi-articulated propeller hub, but a spherical flexible propeller hub that uses a large number of elastic materials.

    ¡°Obviously, the fact that a senior leader in the military can say the word ball-flexible propeller hub means that he is very clear about the difference and application range between bearing-less propeller hubs and ball-flexible propeller hubs.

    Therefore, Zhuang Jianye could only lament in his heart. When he met a knowledgeable leader, he would have lost at least 200 million in funds. However, he was still quite excited and complimented the military leader: "The chief is really awesome. You can tell at a glance that he is the leader."  ¡ª8max uses a ball-flexible propeller hub, which is amazing~~amazing~~¡±

    However, the top military leaders ignored Zhuang Jianye's compliments. Instead, they took a step forward with a somewhat excited look and continued to ask with a trembling voice: "So, you have also broken through the elastic bearing technology?"

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