"The wide-body model of the Yun-10 is also a new derivative model, with a maximum take-off weight of 150 tons, and the dual-use model ...... first" Ma Fengshan introduced the new modification design of the Yun-10.

"In this case, it's no longer Yun Shi, right?" After listening to the introduction, Long Yaohua said that compared with the performance indicators required by the military, it would still be worse, but the new model has made a lot of progress in technical performance.

"It can be said that it is not a Yunten, because of this model, we changed it to an upper wing to prepare for the upper wing in the back. In the design of large domestic transport aircraft, there is a lack of experience and experience, and now it is making up for various deficiencies......" Ma Fengshan said.

Li Mingshan looked at them, "The upper wing design, not for civil aviation?"

"It's completely for the military, after all, wide-body passenger aircraft ......," Ma Fengshan replied, "although the flexibility is poorer, but the stability is better, the military transport aircraft needs to consider the personnel and equipment of the airborne, and need to consider the low-altitude flight performance......

According to Ma Fengshan, this is a completely new project.

Xie Kai clearly knew that the upper single-wing structure was also proposed by him before.

"The performance of civil airliners is very poor, especially the noise heard by passengers in the airport will be very loud, which is not conducive to market promotion. Although Li Mingshan knew, he did not want the 404 research large aircraft to be just for military use, "Although the Air Force has put forward the direction of construction and development, everyone knows that it is impossible to equip large aircraft on a large scale in the short term." ”

Dual-use is the most suitable.

At present, funds are limited, and for a long time to come, the Air Force will focus on troop building, exploration, and experimentation, and the national defense strategy of defense will allow military expenditures to be reduced to a very low level.

Specializing in large military transport planes is not very much in line with the needs of the army's future development, and this makes Li Mingshan feel that it is a bit wasteful.

There is money, no problem.

In the absence of money, it is obviously not appropriate to do this.

On a monoplane, the engine is hoisted under the wing, parallel to the cabin, and the noise is directly transmitted to the cabin, which is not suitable for civil airliners. Similarly, because the aircraft engine is not as close to the ground as the engine of the monoplane, the requirements for the airport runway are very high, and it is impossible to achieve field take-off and landing. It is not possible to parachute even the airborne troops from the side hatch under the monoplane......

Civil airliners and military transport aircraft are different in terms of performance requirements.

What military transport aircraft need to achieve is the construction of large-scale airdrop capabilities, how to deliver troops and equipment to places of urgent need faster and more efficiently, without considering the passenger experience.

Just like the current Yun-8, there is no airtight design in the cabin, and there is no air-conditioning technology, and the soldiers have to wear thick military coats to keep warm......

For civil airliners, the passenger experience is the first consideration.

It's too noisy, and who spends money to pay for sin?

"Chief, our wide-body model, in fact, is divided into two, one is the lower single wing, one is the upper single wing, in as many cases as possible, the use of common standardized parts, in addition to the various test models before the test flight, in production, only the main structure and other places are different...... "Cheng introduced the situation from time to time.

"Your funds?" Li Mingshan had never thought that Yun Shi had developed to such an extent.

If there is a special military transport aircraft, designed for the domestic Air Force, he will naturally be happy.

"There is no problem with funding, all expenses are strictly budgeted. Zheng Yucheng hurriedly said, "There is absolutely no shortage of funds." At present, Yun 10 is the largest project in our hands to make the most progress. ”

The attitude is clear that the current Air Force equipment, especially large aircraft, is a priority for the development of 404.

Li Mingshan just wanted to ask them how to recover the R&D funds in the future if the military did not procure, but in the end he still did not ask.

He knows the answer - not at home, these guys will definitely look for buyers abroad.

Even for the sake of orders, maybe one or two orders, Xie Kai and they will go to fool those small countries to buy.

"Military transport aircraft are a must, mainly in terms of large early warning aircraft, if the lower wing design is adopted, the dish radome on the top does not conform to ......the aerodynamic layout," Xie Kai said, "This is also the price we must pay in order to catch up with the advanced technology in the world." Without a solid technical foundation, it is impossible to overtake in corners in the field of science and technology. ”

Li Mingshan agreed with Xie Kai's statement.

Now the domestic large aircraft supporting facilities are basically perfect, large presses, five-axis CNC machine tools are already available.

The production technology of key parts of the engine has been solved, and mass manufacturing capacity can be formed.

"If there's a shortage of people, you can talk to me and we'll help you figure it out. Of course, it is only limited to the field of aircraft design......" Li Mingshan thought for a long time and took the initiative to speak.

Xie Kai and Zheng Yucheng glanced at each other, but they didn't expect the old guy to take the initiative to say that they were designers in the aviation field.

You don't have to think about it, you know that you have technical experience.

"That's a good feeling, chief, you're really a timely rain. The faces of the two foxes, one old and one young, bloomed with joy.

"Are you really going to move away?" Li Mingshan didn't get an answer, and pulled the topic back again.

The ability of two foxes, one old and one young, to change the topic is getting stronger and stronger, and they will be led astray by them if they are not careful.

"Civilians stay, military moves. A lot of our base is empty. Zheng Yucheng said, "Of course, we are too lazy to build a production line or anything, and whether we will continue to cooperate with Qin Fei to produce test machines or even orders at that time is not necessarily." ”

This can be regarded as giving Li Mingshan a clear answer.

The military wide-body transport aircraft was designed to be moved directly back to the 404.

"In terms of personnel?" Li Mingshan said that he understood, Zheng Yucheng and they were already very kind.

Obviously, Qin Fei's people are anxious to make great strides to improve their technical strength and want to cooperate with Lockheed, but they are not kind.

"We are going to be transferred there from time to time to preside over the design of large military aircraft. When Zheng Yucheng said this, he looked at Ma Fengshan.

Cheng heard this from time to time, obviously because he was too surprised, and he didn't believe it for a while.

Ma Fengshan didn't have anything abnormal.

Although Cheng is young from time to time, he has partnered with him for so many years and knows a lot about large aircraft technology.

Li Mingshan did not interfere with the personnel appointment and dismissal of 404, and Zheng Yucheng must have fully considered it when he proposed it here.

The person was proposed by Xie Kai, and he was also very helpless, Tang Dana, who was 20 lucky in China, is still studying for a graduate degree in solid mechanics, and he still has a few years to graduate, so he can't dig people now, right?

"Chief, are they really going to move out?" Sun Daoqian and the others had been waiting for news.

Once the Yunshi project moves away, their good days will come to an end.

Although the production of the Yun-10 project is not much, and one is produced a year, seeing that the model derivative design has come out now, whether it is a prototype manufacturing or a mature Yun-10 passenger aircraft with a mature production design, it is a big order, and the production task of Yun-8 will be nearing the end.

On the surface, the above does not support or oppose the continued development of Yun Shi, but a lot of funds have been allocated to Qin Fei's production supporting upgrades, so that Qin Fei's production line has been in a slow continuous update and upgrading.

Yun Shi moved away, and opened the production line by himself, and by then, these appropriations would be gone.

The production order is gone, so how can you live a good life?

"They were only partially evacuated. Civilian projects remain on this side. Li Mingshan briefly introduced the situation, "Unless there are some factors that affect the development of Yunshi." ”

These words were obviously a warning to Sun Daoqian and others.

Su Xingguo smiled bitterly, "Chief, if they don't participate, where else is it possible for us to cooperate with the Americans!"

Sun Daoqian also nodded, "They won't come out with money, even if it's a modification of a wide-body passenger plane and the introduction of American technology, they don't agree." ”

Li Mingshan looked at the two and sighed.

In the military, even if there is an accelerated development of imported technology, what can it do?

The army has no money, and now everything has to make way for the country's economic development, which determines that the air force does not have much money to purchase large-scale advanced equipment.

The people of 404 see much more clearly than Sun Daoqian.

"Sometimes, when engaging in military scientific research projects, it is not necessary to draw results, but the process is very important. In particular, the stimulating effect of the process on the entire national technology system cannot be ignored. Li Mingshan only dropped such a sentence.

Cheng has always been a little unclear from time to time, it stands to reason that the military large aircraft project is more important, why let himself preside over this work?

He didn't ask too much, though.

"Ma Lao, how big a gap can there be between the military wide-body and the civil aviation wide-body in terms of performance?" After Li Mingshan left, Xie Kai and Zheng Yucheng called several core leaders of the large aircraft team together for a meeting.

The main discussion is the continuous modification of the Y-10 and the launch of the military transport aircraft.

"The gap is a lot bigger. The civilian ones only widen the fuselage, or even lengthen it, and the wing spars and wing boxes cross the entire cabin, on the one hand, it will affect the shipment of goods, like heavy equipment such as armored vehicles, if it is installed on the wing box as the center point, the center of gravity will be raised, and it will not be able to fly at all......" Ma Fengshan thought that Xie Kai knew, and while staring at Xie Kai with surprised eyes, he introduced.

Xie Kai asked this purpose, not because he didn't know.

Rather, I want to know how likely it is that aircraft for different purposes for military and civilian purposes can be used in parts and components.

That will reduce costs.

"The parts are very versatile, although the structure is a little different. The requirements of civil airliners are higher than those of military aircraft, and on the airport runway with good conditions, the service life of the landing gear with higher strength is higher, which can effectively increase the service life. There is only one disadvantage, that is, the production cost is higher. ”

"How much higher?"

"At least 15 percent. ”

"That's acceptable. "Just raising the cost by such a small amount can effectively reduce the cost of the military, which is already very cost-effective.

"You can't use Yun Shi anymore for this project, right?" Zheng Yucheng was interested in naming it again, and looked at Xie Kai with a look of hope, "Yun Shi is 110 tons, our new model, or call it Yun 15?150 tons...... In the future, the 200-ton class will be called Yun-20......"