Rebirth of Military Workers

Chapter 789

Xie Kai looked at the hopeful expression on the old guy’s face with a weird look.

He actually thinks this way.

If a 150-ton transport plane is called Yun-20, it would be a shame for Yun-20.

He clearly knows the technical performance of the Yun-20. The maximum take-off weight is more than 220 tons, the maximum load is more than 66 tons, and the range is more than 9,500 kilometers, although the online announcement is only more than 7,800 kilometers…

How can a 150-ton aircraft occupy the model name of the Y-20?

“Then it is called Yun-15. To distinguish military from civilian use, military use is called Yun-15, civilian use is called Yun 10-200, that level, with two hundred positions, no problem, right?” Xie Kai Never let Zheng Yucheng, an old guy, do such a good thing by himself.

Ma Fengshan and others hurriedly nodded, indicating that more seats can be arranged.

Zheng Yucheng looked at Xie Kai contemptuously. This kid was so shameless that he cast him expectant eyes.

Have to grab the naming rights yourself.

“By the way, Mr. Cheng, I think that some details of the overall aerodynamic layout of our military design may be the most suitable. Although the transport capacity of the Il-76 is strong, compared with the C-141 in the United States, the economy still needs Not bad.” Xie Kai looked at Cheng Wei from time to time and said in a discussing tone.

He didn’t want to interfere with the design.

However, the current YXT wide-body model, no, it should be called Y-15 to be exact. The aerodynamic layout is largely based on the IL-76 that Xie Kai obtained from the Iraqi.

Cheng looked at Xie Kai from time to time, with a smile on his face, making a performance of listening.

“In terms of aerodynamic layout, based on our current lack of experience and technology, the conventional layout is more reliable. For the overall starting layout, we can adopt a large aspect ratio wing design, leading edge sweep, and no wing tip design. I think it can also be used. In addition, don’t use the Il-76’s structural design where the wing directly passes through the top of the cabin…” Xie Kai said, his face became serious.

These technical characteristics are all adopted by Yun-20.

Yun-15 is obviously for Yun-20 as a basic reserve, on the one hand to accumulate design experience, on the other hand, it is used to verify these technical theories, so that domestic designers can avoid some detours.

From time to time, Cheng and Ma Fengshan and others frowned and looked at Xie Kai.

Once the design is changed, a lot of work will take longer.

“I know that everyone is worried that these design changes will affect the progress of the project. You don’t need to rush to produce results. When you look at the higher and larger the foreign aircraft, you will start to become anxious. It is useless to build a house. , Waiting for the upgrade of domestic technical support!”

“Chief Li Mingshan has already put forward the army’s performance requirements for future large aircraft. Our Yun-15 could not meet the requirements. If we change it, then…” Cheng looked embarrassed from time to time.

If Xie Kai is a professional aviation design expert, he would not have any opinions.

These things proposed by Xie Kai require a lot of experimentation.

“Based on the current annual military budget, how much can the Air Force buy? You guys, don’t just stare at you. The demand for the Air Force’s fighter jets is even greater…” Xie Kai understands the future development of the Air Force and will definitely not disrupt the future development of the Air Force. The pace of their development.

In the short term, it is impossible for the Air Force to purchase large-scale military transport aircraft on a large scale.

After the disintegration of the Soviet Union in the early 1990s, the Air Force has gradually accumulated a wealth of Il-76. After decades, the total number has not exceeded 40. Many of them are used as carrier aircraft for Air Police-2000. The Il-78 aerial nurse transformed from Il-76.

“Or, we simply learn from Boeing and McDonnell Douglas, developing monoplanes. In this way, although the layout of the aircraft will affect the transportation, it can be used for both military and civilian purposes. Whether it is an early warning aircraft, aerial tanker, or bomber, it can be used. …” Cheng asked tentatively from time to time.(Read more @ wuxiax.com)

To remodel, it is better to be thorough.

The use of a single wing, although it is said that both stability and flexibility are at a medium level, at least in terms of the future prospects of the project, it is better and more cost-effective.

“No.” Xie Kai shook his head resolutely, “At present, with our technical reserves, it is difficult to solve some problems. For McDonnell Douglas and Boeing, they proposed such a design, which only needs to change the design and manufacture of the middle section, and the front and rear airframes are divided. Duan, just go straight up… and even so, the US Air Force’s strategic transport aircraft has not adopted such a design.”

Large military transport aircraft cannot take shortcuts.

Looking at the world’s large military transport aircraft, none of them use mid-wing or lower-wing wings, and all are upper-wing wings.

Cheng looked at Zheng Yucheng for help from time to time, hoping that he could stop Xie Kai from messing around.

However, Zheng Yucheng looked at the sky, staring at the ceiling and wandering.

He doesn’t understand technical issues, and he won’t direct blindly.

On the other hand, Xie Kai doesn’t seem to understand, as if he doesn’t know what he doesn’t understand. Of course, this is just Zheng Yucheng’s understanding of Xie Kai.

“Regarding the wing layout, I think we should adopt the design of the top-mounted wing box, that is, the entire wing box is outside the cabin, instead of the structure of other large aircraft that inserts the wings into the cabin. In this way, The net height under the wings will increase a lot, and the size of the cabin can be widened and heightened, which is conducive to loading a single piece of over-gauge cargo at the maximum cabin height…” Xie Kai continued.

The humpback appearance of the Y-20 is the most unique shape of a large aircraft in the world, and it is also the most obvious feature that distinguishes it from other large transport aircraft.

Even the ultra-high cargo that cannot be transported by C-17 can be transported by -20; the ultra-wide objects that cannot be transported by the latest modification of IL-76, such as the 99 main battle tank, can also be transported by -20. Transported.

Now that the 99 tank is still in the drawing design stage, Xie Kai can’t help but consider these.

Of course, if the transport of -15 is done, the maximum load capacity is that it is impossible to transport 99 tanks at all, so what?

Yun-15 is just a basis. Yun-20 and Yun-30 are all required.

“In this way, the entire aerodynamic layout has to be modified.” Ma Fengshan looked at Xie Kai, frowning, “The previous design used the upper single wing to be inserted into the top of the cabin. If it is not inserted, it is equivalent to the entire aircraft. Hanging under the wing requires higher strength.”

At present, there are only 45,000 tons of large presses in China. The pressure-forged parts that this large press can provide cannot support hundreds of tons of aircraft to fly for a long time in the air.

If you want to do this, you need a more stable design, more advanced materials, and a larger tonnage forging press.

Means higher cost.

“Didn’t we have begun to build a 65,000-ton large press?” Zheng Yucheng said casually. In the field of security, our design must be advanced. If we can’t design it, we will fall behind, right?”

This old guy still understands very well.

Xie Kai looked at the old guy, as if he didn’t understand anything at ordinary times, and always hit the nail on the head when it was critical.

As a unit of the military industry system, the design must be forward-looking.

“Not only that, but even the avionics systems used, I hope to adopt more advanced systems. I want to integrate the various instruments used to indicate the data of different systems into fewer digital displays…”

Since we are preparing for Yun-20, we are not afraid of slower time.

With the requirements put forward by the design, the surrounding supporting units will work hard in this direction. Once successful, the overall technical performance can be improved a lot.

“Will it be too difficult?” Ma Fengshan’s brows were twisted together, but he didn’t say a word. Cheng couldn’t help but say it from time to time. “Let’s not talk about how long it takes to fix this in China. It just uses a lot of advanced composite materials. Wait, the cost will rise to a very high level. Can the Air Force afford it?”

Cost is the most unavoidable issue for domestic designers.

The technology is too advanced and requires more research to support it; the large-scale use of various advanced materials will cost more.

The Air Force can’t afford or use more expensive equipment at all.

“It’s really harder. Ten years, is it enough?” Xie Kai asked, “This is not a joke, please don’t forget the purpose of the project itself. On the one hand, it is to solve the problem, on the other hand, it is It is through these projects to stimulate the technological development of domestic related supporting industries!”

Without a good foundation, don’t even think about challenging more difficult technologies.

Those engaged in military industry have this mindset.

“The original Yunshi design had to compromise with the existing technology in order to get results faster. Why didn’t the Civil Aviation Administration of China? That result can only bring disaster to the project!” Zheng Yucheng assisted again. “At the beginning, it was said that Yunshi could enter mass production with only 30 million yuan. Up to now, including the supporting large presses and our integrated engine plant, the investment has exceeded 500 million yuan, and it still has not received the Civil Aviation Administration of China. Airworthiness permit, commercialization completed…”

When he thought of the real situation when he took over Yunshi, he was upset.

This is one of the reasons why several other old guys often despise him.

Ma Fengshan and others were a little embarrassed.

Wasn’t it all for the sake of not letting the Yun-10 project be dismantled? There was nothing to do.

“Everyone, Director Zheng has no other meaning in saying this. At the beginning, there was no money, so I had to do it. Now, we don’t need to think too much about the cost. What we need is technology, the experience and experience accumulated in the process of breaking through technology. Technology!” Seeing Zheng Yucheng embarrassed the whole atmosphere, Xie Kai hurriedly rescued the scene.

Zheng Yucheng also realized the problem and hurriedly said, “Yes, the purpose of this is to keep everyone from being overwhelmed! The technology of Yunshi is now mature, and the supporting facilities are also becoming more perfect… We are designing in order to adapt the supporting facilities to us. Instead of adapting to the package.”