On the plane, Chang Haonan, who finally had time to spare, covered himself with a blanket and took a glass of juice from the young lady of the flight attendant in military uniform.

Yao Mengna went back to school directly, and did not go to Rongcheng with her-

Since it is a project, desk work such as year-end summary is indispensable.

And with his current status, he definitely doesn't have to do these jobs himself.

I can only work hard, senior sister.

So Chang Haonan, who had nothing to do, was ready to summarize his gains during this time.

Because of the smooth development of the Seiko plan and the use of abrasive flow processing equipment, the 112 factory and 601 received a sum of 60,000 yuan from the project funds as a commission and rewarded him.

In addition, before leaving, Yang Fenghata specially approached him again, saying that the commendation given by the head office was really not enough to convince the public, and he would continue to apply to the above for honors that were in line with the latter's contributions.

Although Chang Haonan will not change his plan because of these things outside his body, he has to admit that Yang Fengwan obviously has a hand in winning people's hearts.

After the phased results of the 83 project, the 112 factory and the 601 institute in Shengjing not only want to carry out the No. 11 project, which includes at least 3-4 sub-models, but also carry out technical pre-research on a stealth flying wing UAV.

This is a self-funded project, which is of course much more generous than the J-7F, but given its rather ambitious goals, it is not difficult to expect many difficulties.

And if we can get the help of a strong foreign aid, the progress of both projects will obviously be much faster.

In addition to material rewards and that insignificant reward, for Chang Haonan, what is more important is the system.

Perhaps because the movement of the Seiko Project was too big, this time he directly gained up to 125 scientific research points, as well as a large amount of experience points, especially in management:

[Research points: 500.]

Theoretical level: LV2 (3500/10000)

Engineering experience: LV2 (1000/10000)

Management capability: LV2 (0/10000)

Comprehensive ability: LV2

Projects in progress: 0

Possible Projects: 2]

After the theoretical, engineering and management levels were upgraded to level 2, the comprehensive ability assessment of the system was also upgraded by one level.

The benefit on the bright side is that it is now possible to work on two projects at the same time.

But Chang Haonan still remembers that when he was just reborn, he once asked the system to help design a J-20 with a little mischievous mind.

The response was that the level of competence was insufficient, and there were no ideas available for the project.

In other words, in order to carry out a project, in addition to having a closed-loop and feasible idea, there are also requirements for the level of the system.

It's just that his research has always been more down-to-earth, so he hasn't seen the same hint again.

However, as he gradually begins to get in touch with the more advanced research content represented by the third-generation aircraft, the improvement of comprehensive capabilities will obviously bring a lot of benefits.

……

A few hours later, the Tu-154 landed on the runway of Shuangliu Airport in Rongcheng.

For Sichuan Province, where he lived and worked for more than ten years before his rebirth, Chang Haonan naturally has feelings.

But he actually hasn't been to Rongcheng much, but he has not been upgraded to a municipality directly under the central government.

Fortunately, the 611 Institute directly sent Lu Yuying to pick up the airport.

When Chang Haonan was taken by the other party and saw the car that looked almost exactly the same as the BJ212 Jeep, but the tail was slightly longer, he couldn't help but sigh that there might be some tacit understanding within the aviation industry system.

Unexpectedly, after Lu Yuying heard his thoughts, he smiled and waved his hand:

"Comrade Xiao Chang, this time you can look away, this is not a BJ212."

"Oh?"

Chang Haonan's understanding of cars basically stays on a few thunderous brands.

But after all, the journey to the 611 Institute is not close, and it does need some topics to pass the time, and it is not difficult to guess from the tone of the other party that this car may have come from a third-tier factory in the past, which is a history that he has not experienced but is quite interested in, so he does not mind listening to the introduction related to it.

Lu Yuying patted the driver's platform in front of him, turned back to Chang Haonan and explained:

"This car is called JC121A, which is locally produced in our Sichuan Province, called Mustang Bailu brand, and the imitation is BJ121, and many official cars in the province are this model, or better JC212."

"Local production...... Could it be your 611 or 132 factories......"

Chang Haonan tightened the coat he was wrapping around as he spoke.

This car, which looks like it has been running for some years, does not have wind leaks, and there is no heating equipment, so it can only rely on people to resist the dampness and cold of this Shu winter.

Of course, he was used to this kind of climate in his previous life, but now this body is still very unaccustomed to this body for the first time to spend the winter in the Yangtze River basin.

"Not really."

Seeing him like this, Lu Yuying took out a pair of gloves from somewhere and handed them over, signaling Chang Haonan to put them on:

"Mustang Bailu was led by the Rongcheng Automobile Repair Factory and jointly engaged in four automobile manufacturing and maintenance companies, but the 132 factory produced some parts for them in the most difficult years."

"Before 90 years, the development momentum of light automobile factories has been good, but unfortunately in recent years, good foreign cars have continued to come in, and joint venture production has been carried out, and the price is getting lower and lower, and this miscellaneous brand has been difficult to sell."

For Chang Haonan, this kind of thing is not new, after all, similar plots will continue to be staged in the next ten years.

Moreover, judging from his experience along the way, the quality of this Mustang Egret brand car is indeed not flattering.

For areas that do not directly affect national security, there are some things that should be let go.

China's automobile industry must be developed, but Chang Haonan has limited energy and cannot do everything himself, so he can only rely on ways such as the Seiko plan to spread the technological achievements of cutting-edge projects faster.

As for who can enjoy this wave of technological dividends, it only depends on their own efforts and creation.

After all, the fate of a factory is not only to consider its own struggle......

Chang Haonan and Lu Yuying chatted all the way about this car, about Rongcheng, and about the aviation industry, and finally came to the 611 Institute before the sun set.

"Now the comrades in charge of the No. 10 project are all in the 132 factory to follow up the final assembly of the No. 01 prototype, and the institute is a little deserted, but our J-7F project team is here, and we have also arranged a simple reception ceremony for Comrade Xiaochang."

Perhaps for fear of rejection, the latter then continued:

"In addition to our 611 and 132 factories, there are other fraternal units involved in the project, especially the comrades from several factories on the Zhucheng side, who have come over here."

"I also want to meet the comrades who built the city, they are not easy."

Chang Haonan nodded slightly:

"But I still want to go to my accommodation first and pack my luggage."

If you only look at it from the map, then the city does not seem to be much more remote than Rongcheng, but due to a series of factors such as history and topography, the economic level of the former is much worse, and the 648 Institute and Guifei (130 Yunma Factory and 162 Shuangyang Factory), which are also the products of third-line construction, are naturally not so satisfactory compared to the brother units.

At present, it can only rely on the Jianjiao 7 model to maintain the production line and R&D capabilities.

Therefore, when Lu Yuying proposed the export-oriented J-7 improvement plan, the city construction side chose to join almost without thinking.

Considering that most of the future production capacity of Plant 132 may be placed on the production of J-10, Guifei Factory has a good chance to obtain the production task of the new modification of the follow-up J-7, and the 648 Institute can also use this project to train the team.

In this most difficult moment for the military industry, only by finding a way to survive can it be possible to persevere until the day when we see the light of day.

"No problem, I'll take you there, the conditions are definitely no worse than those over 601."

Lu Yuying patted Chang Haonan on the shoulder, and then motioned for the driver to drive towards a side road.

……

The dinner was held in the 611 guest house.

The scale is not large, at least not as good as after the successful test launch of the Thunderbolt 11.

After all, it was a celebration of the past.

Not surprisingly, not long after the banquet began, after Lu Yuying introduced Chang Haonan to everyone, the topic of the scene gradually turned to aircraft design.

"Comrade Chang, we have seen the turbojet 14B engine that has just been shipped from Shengjing yesterday, can you tell us about the difference between it and the old model in terms of air inlet matching?"

The one who opened the door was an engineer from the Liyang plant.

When he was doing a high-altitude platform test in the 624 Institute before, he also had a relationship with Chang Haonan.

As one of the participants and funders in the research and development of the J-7F, Liyang naturally hoped to use its own turbojet 13FII engine as power.

But after seeing the Turbojet 14 ground tested with their own eyes, they immediately realized that it was a new model that would take a leap forward in the aircraft's performance.

But there is still a little bit of unwillingness to recognize the reality and recognize the reality.

"It's mainly in the transonic range, on the overflow resistance of the air intake."

Chang Haonan put down the cup in his hand and explained to the other party:

"In order to improve the comprehensive performance of the engine, the final turbojet 14 engine boost ratio reached 18.6, which is basically between a typical turbojet engine of less than 15 and a typical turbofan engine of more than 20."

"Since the main installed object of the turbojet 14 was initially determined to be the high-altitude and high-speed oriented J-8C, the jet speed was increased by increasing the temperature before the turbine and redesigning the afterburner to maintain its performance at more than twice the speed of sound, at the cost of using a large number of new materials, the life of the old model has hardly been improved."

"But the design maximum speed of the J-7F aircraft is only about Mach 2.1 per hour, and the speed is mostly in the subsonic to transonic range in the hyposonic state, and the excessively high jet speed is meaningless for our model, so I specially asked the 606 to reduce the temperature before the turbine and the jet speed when designing the turbojet 14B, in exchange for longer life, higher reliability and lower fuel consumption."

"But there is a problem, the original air intake tract was designed according to the flow characteristics of the turbojet 13F engine, it is too large for the turbojet 14B, the air flow captured by the intake lip is even greater than the sum of the flow and deflation required by the engine, and the positive shock wave of the lip will be pushed out, so that the inlet tract will work in a subcritical state for a long time, resulting in a large overflow resistance."

"I don't know if I understand?"

His explanation was concise and to the point, and in three or two sentences, he understood the parts that the J-7F needed to optimize next.

In fact, this work 611 Institute is not impossible to complete alone, but it needs to explore a little bit of suitable advance matching desserts, which is far less efficient than Chang Haonan, who understands the air intake characteristics of aircraft and engines at the same time.

After all, we still have to catch up with the first flight node.

The engineer who asked the question just now didn't want to embarrass Chang Haonan, so he simply nodded, and then raised his glass and gestured to Chang Haonan.

"In that case, Comrade Chang ......"

Another young engineer from the 611 Institute spoke.

"Just call me a permanent worker."

Among people of the same generation, Chang Haonan is still more accustomed to this title.

"Okay, that Changgong, since the key to the inability of the old intake tract and the engine to match is that the intake air flow is too large, can you directly design a few air vents to increase the air intake volume?"

"No, of course not."

After hearing this question, Chang Haonan shook his head solemnly, then looked around, and found that there was a blackboard in the corner of the scene, so he walked straight over, directly picked up chalk and drew an abstract air inlet schematic diagram on it.

The reason why he attaches so much importance is because he remembers the research on the mandibular airway in his previous life, and it was in this place that he suffered a lot of setbacks.

"In the subsonic state, there is no problem with the way you just said, but in the transonic range, the positive shock wave of the inlet wave system is located outside the inlet lip, between the boundary of the free flow tube and the surface of the wedge, and it does not reach the position of the vent at all."

"If it is an adjustable air inlet like the J-8C, it is not a big problem, but the shape of the air intake of the J-7F is fixed, and there is no way to adjust it according to different speeds, so the entire air intake structure design must be optimized."

Chang Haonan put down the chalk and turned his head, and what caught his eye was the expressions of a group of people who either bowed their heads in contemplation or suddenly realized.

When the banquet was held here, there was already a bit of a technical seminar.

In order to make the atmosphere less bad, Chang Haonan changed his expression and tone to a more relaxed one:

"And don't you think the previous design was a little too ugly? It's like ...... Like a toad with a wide open mouth. ”

"After switching to a new design, the overall appearance is still the same, but ...... At least the mouth wasn't as big as it is now, and it was much more coordinated. ”

This description made the atmosphere of the scene suddenly enliven up a lot, and some people couldn't help but laugh when they heard it.

In fact, the mandibular inlet design is indeed worse in terms of aesthetics, but things like the J-7F and the U.S. military's F8 and A7 are all fine.

The real breakthrough in aesthetics is the yet-to-be-unavailable X32 fighter, which is Boeing's technology demonstrator for bidding for the JSF project.

The toad beak is also used to describe this model.

One of the very important factors in the X32's final defeat to Loma's X35 was that the pilots of all three services said that they were unwilling to fly such an ugly plane into the air, which was too demoralizing.

Lu Yuying also raised his wine glass very appropriately at this time:

"Then I wish our new model, with the help of Comrade Chang Haonan, can evolve successfully!"

"Evolution Success!"

Everyone present responded to the Tao together.

(End of chapter)