There are three places with the highest concentration of heavy industry in China: the old industrial base in the northeast, the area around the Qinling Mountains, and the strategic rear area in the southwest hinterland.

Large aircraft in Shanghai, not because of the good foundation of heavy industry there, but because the conditions of Shanghai were better, compared with the heavy industry in other places, this side is actually not in line with the production of large aircraft.

Many spare parts are transported from the Qinling Mountains and the northeast.

If he couldn't cooperate with Qin Fei, Xie Kai could only choose Rongcheng in the southwest hinterland.

The northeast is too far away, and the supporting units of various large aircraft are not as perfect as those in the southwest.

In those years, for the sake of national defense strategic security, many important core units were arranged in the southwestern hinterland, which was safer.

"I think let's ask them how much they produce each year, and whether it will affect our production and improvement. Such an opportunity for cooperation, once missed, is difficult to encounter again. Ouyang Shaoxiu didn't want to lose such an opportunity.

Su Xingguo also nodded, "Yes, even if they produce one every year, on our side, we can do a lot of supporting facilities, and there are tens of millions of funds a year." ”

"If they produce too many quantities, it will seriously squeeze the production and improvement work of Yunba. Sun Daoqian was worried about affecting their project, "The Yunba modification work must continue, they have insufficient scientific research personnel, and there are insufficient assembly technicians......

"We are mainly based on Yun 8, they are modified Yun 10, and when they have the ability, they will undertake some of their technical projects, or merge projects that are not much different from our technology. Regarding the worries of Sun Daoqian and others, Ouyang Shaoxiu also had them before.

That's why they hope that the Yunshi team will participate in their project.

Funding can be strongly supplemented, and technical strength can also be enhanced.

"Let's talk to them again, as long as it doesn't affect our project, we can work together. What do you think?" asked Sun Daoqian.

Everyone else agrees.

They can't afford to lose their current main business for the sake of cooperating with the Yunshi project team.

The Yun-10 has many technical defects, and when the time comes, the technology of large aircraft will not be available, and small planes will not be able to make breakthroughs, and they will not be able to make a difference to the military.

"How many planes can you produce each year?" Xie Kai asked Su Xingguo after he asked them.

The output of Yun-8 cannot be large, from 80 years to the present, in five years, only 25 aircraft have been produced.

The Air Force will not equip too much of such aircraft.

Until the real Y-9 came out, the number of Y-8 equipment was only about 100, including more than 20 aircraft supplied to civil aviation and exported.

Almost five units are produced per year.

For such a large aircraft plant, this is an embarrassingly small number.

"At the maximum capacity, we can produce about eight aircraft per year. "Su Xingguo is not lying about this.

Now production is almost at a rate of five per year.

Modifications are carried out at the same time as production, and at the same time the production of other types of aircraft is also carried out.

"In other words, your idle production capacity can't provide us with one Yun-10 every year?" Zheng Yucheng asked.

In the current situation of Yun Shi, it is impossible to produce one aircraft a year.

However, the modification work requires a lot of experiments, and the prototype is indispensable.

Therefore, there must be at least one spare capacity reserved per year.

"That's pretty much it. Su Xingguo nodded and said.

Qin Fei is huge, and the scale is even larger than the 404 base.

Such a small amount of production capacity per year is staggering.

Perhaps the scale used to produce vintage aircraft is not small, and the most important thing is that this factory is well-equipped. For any part of the aircraft, from material production to processing, Qin Fei's own factory can complete all aspects of manufacturing.

This is the case for many domestic enterprises.

Even the 404 base is the same.

Although the sparrow is small, it has all kinds of organs, and all units pursue comprehensiveness in construction, if nothing else, for the outbreak of war, all spare parts can be produced by their own factories, and production will not be affected by logistics and transportation problems.

"Ladies and gentlemen, it is your production capacity that is now an obstacle to our cooperation, can you understand that?" Xie Kai asked.

Sun Daoqian looked at him, "Didn't they all make it clear?"

"We don't need to produce one every year, in the beginning, it was only one every two years. Zheng Yucheng said.

"You said it, but it's just the beginning. Su Xingguo reminded Zheng Yucheng.

The production process of the Y-10 is more complex.

"I don't know if you've heard of the pulsating production line?" Xie Kai asked.

If the production capacity is low, it is natural to increase the production capacity.

When Xie Kai visited the Yunba production workshop in the morning, he found that each aircraft was densely packed with tooling and equipment, instead of the pulsating production line that was commonly used in aircraft production later.

"I've heard of pulsating production lines, but I don't know the specifics. Do you know?" Su Xingguo's eyes lit up.

Zheng Yucheng didn't know what a pulsating production line was, and even Ma Fengshan and others didn't know it.

How Xie Kai knows is not paying attention to it at this time, they are concerned about what a pulsating production line is.

"Actually, I don't know very well, I've always heard of assembly line production before, and the last time I went to Xiangjiang to see assembly line production. On the entire assembly line, each job is only responsible for a small process...... "In order not to be asked, Xie Kai can only talk about the assembly line first.

The aircraft pulsating assembly line is actually an optimized assembly line.

"When I first heard about the pulsating production line, I didn't know what was going on. When we took over the Yun-10 project and learned about the Yun-10 production process, I was thinking that if the Yun-10 needed large-scale mass production, with the production capacity of Factory 5703, it would be able to produce several aircraft a year...... "Xie Kai said slowly.

He's said so much that he hasn't even begun to say what a pulsating production line is.

Qin Fei's people were in a hurry, and they couldn't urge.

Zheng Yucheng was different, he was extremely upset by Xie Kai's behavior of talking and appetizing, and immediately interrupted Xie Kai's words angrily, "You just say it, don't sell it and hang your appetite." ”

"What are you anxious about? I have to say no?" Xie Kai glared at Zheng Yucheng.

Everyone was helpless.

"All domestic aircraft production is in the traditional way, with the aircraft as the center, the tooling equipment is arranged around the aircraft, and the assembly workers take a fixed station to work according to the final assembly task...... In the whole production process, most of it relies on manpower. The work intensity of workers is high, and the slightest negligence may cause missing installation or missing inspection. In the prototype production process of Yunshi, seven large-scale quality troubleshooting work was carried out, and thousands of problems were found...... "Xie Kai said this, not to hit the Yunshi team.

Ma Fengshan and Cheng were embarrassed from time to time.

What Xie Kai said was the truth, and this is what they told Xie Kai.

It took seven large-scale quality inspections to gradually form a quality inspection system, but even so, it was still difficult to ensure stable quality.

"If we divide the production process of the aircraft into several important stages, the first stage is the assembly of small parts into large parts, such as the installation and testing of flaps and ailerons of wing components, and then the second stage of work will be carried out without problems. ”

As soon as Xie Kai's words came out, the entire conference room was silent, and Ouyang Shaoxiu, Ma Fengshan and others quickly recorded what he said.

As long as you are knowledgeable, you know that in this way, after the work is subdivided, you can not only quickly improve the proficiency of workers, but also ensure quality from all aspects.

"The second phase of work is to carry out the installation of six major parts of the aircraft's front fuselage, middle fuselage, rear fuselage, left and right wings and tail section, as well as pipelines, cables and various functional systems. The large components were also largely installed and initially inspected in the first phase......"

Each part of the aircraft is installed separately and inspected before the overall installation to minimize the missing parts and failure rate.

In this way, the quality of the entire production process becomes controllable.

"The third stage of work is the installation of the main landing gear as well as floors, insulating blankets, secondary structural parts, etc. ”

"The fourth stage of work, decorating the interior of the aircraft, installing an auxiliary power unit and conducting preliminary tests on it. ”

"The fifth phase of work is to carry out hydraulic system, landing gear retraction test, avionics test, flight control test, etc. ”

Xie Kai briefly introduced the division of the working area of the pulsating production line from Boeing that he remembered in his mind.

"This is a good way to do this, so not only will the production efficiency be greatly improved, but the quality problems will also be effectively solved. Ouyang Shaoxiu took the lead in slapping after Xie Kai finished speaking.

The benefits of the method proposed by Xie Kai can be seen at a glance as long as people who understand management.

The biggest problem of domestic production is that it is inefficient and quality control is not easy.

"Not only is the efficiency improved and the quality controllable, but in the production process, when each stage of the work is completed, the aircraft as a whole moves forward, and each work area is directly responsible for the work they undertake, and there are fewer inspection and inspection links...... At the same time, we can improve the utilization rate of tooling and develop some auxiliary equipment to make production more efficient...... "Xie Kai said.

"For example?" Su Xingguo was also interested in this production method.

"Installation of six major components of the aircraft. It adopts modular design and manufacturing, and the installation of pipelines and cables of each component is completed before final assembly, forming a large component module structure. In the final assembly, the tooling is designed according to the position, and only a few parts need to be put close together before installation, so that the work becomes simpler...... "Xie Kai said.

The advent of pulsating production lines will greatly reduce the time and tooling required for aircraft final assembly, and at the same time, the quality will become more controllable.

"This is what I understand as a pulsating production line, and I don't know if that's the case. Xie Kai saw the surprise on many people's faces and said with a smile.

Qin Fei once completed the first pulsating production line in China, and in this era, as long as they really pay attention to it, they will also complete the first domestic one, and take the lead in integrating with international standards in terms of assembly methods.