Chapter 187 J-7, super evolution! (2-in-1)
On the plane, Chang Haonan, who finally had some free time, covered himself with a blanket and took a glass of juice from the flight attendant in military uniform.
Yao Mengna went back to school directly and did not go to Chengdu with her——
Since it was a project, desk work such as year-end summary must be indispensable.
With his current status, he definitely doesn’t have to do these tasks himself.
I can only work hard for my senior sister.
So Chang Haonan, who had nothing to do, was ready to summarize what he had gained during this period.
Due to the smooth development of the Seiko Plan and the putting into use of abrasive flow processing equipment, Factory 112 and 601 were able to legitimately take out a sum of 60,000 yuan from the project funds as a commission and reward him myself.
In addition, before leaving, Yang Fenghata came to him specifically and said that the awards given by the head office were not enough to convince the public, and he would continue to apply for honors from above that were in line with the latter's contribution.
Although Chang Haonan will not change his plans because of these external things, he has to admit that Yang Fenghao is obviously good at winning people's hearts.
After the August 3rd Project achieved phased results, the 112th Factory and the 601st Institute in Shengjing were not only engaged in Project 11th, a major project involving at least 3-4 sub-models, but they were also working on a stealth flying-wing drone. Human and machine conduct technical pre-research.
This is a self-funded project. Compared with the J-7F, the funds are certainly much more generous, but considering its rather ambitious goals, it is not difficult to predict that it will face many difficulties.
And if we can get the help of a strong foreign aid, the progress of these two projects will obviously be accelerated a lot.
Apart from material rewards and that trivial commendation, what is more important to Chang Haonan is the system.
Perhaps because the Seiko Plan created too much noise, this time he directly obtained up to 125 scientific research points, as well as a large amount of experience points, especially in management:
[Scientific research points: 500
Theoretical level: LV2 (3500/10000)
Engineering experience: LV2 (1000/10000)
Management ability: LV2 (0/10000)
Comprehensive ability: LV2
Projects in progress: 0
Projects that can be carried out: 2]
After the theory, engineering and management levels are all upgraded to level 2, the comprehensive capability assessment of the system has also been improved. class.
The obvious benefit is that now two projects can be carried out at the same time.
But Chang Haonan still remembers that when he was just reborn, he once thought about letting the system help design a J-20 with some mischievous thoughts.
The response I got at that time was [Insufficient ability level, and there are no available ideas for the project]
In other words, in order to launch a project, in addition to having a closed-loop and feasible idea, there is also a need for systematic Levels are also required.
It’s just that his research has always been more down-to-earth, so he never saw the same prompt again.
But as he gradually begins to be exposed to more advanced research content represented by third-generation aircraft, the improvement of comprehensive capabilities will obviously bring many benefits.
……
A few hours later, Tu-154 landed on the runway of Chengdu Shuangliu Airport.
Chang Haonan naturally has feelings for Sichuan Province, where he lived and worked for more than ten years before his rebirth.
But in fact, he has not been to Rongcheng very often. Instead, he has been to mountain cities that have not yet been upgraded to municipalities.
Fortunately, the 611 Institute directly sent Lu Yuying to pick him up at the airport.
When Chang Haonan was led by the other party and saw the car that looked almost identical to the BJ212 Jeep, except that the tail was slightly longer, he couldn't help but sigh that there might be some kind of tacit understanding within the aviation industry system.
Unexpectedly, after Lu Yuying listened to his idea, he smiled and waved his hand:
"Comrade Xiao Chang, you are wrong this time. This is not a BJ212."
"Oh?"
Chang Haonan's understanding of cars basically stops at a few well-known brands.
But after all, the road to the 611 Institute is not close, and we really need some topics to kill time, and it is not difficult to guess from the other party’s tone that this car may have come from a third-tier factory in the past. I have never experienced the history but am quite interested in it, so I don’t mind hearing the introduction related to it.
Lu Yuying patted the driver's seat in front of him, turned around and explained to Chang Haonan:
"This car is called JC121A. It is produced locally in our Sichuan Province and is called Yema Bailu. The imitation is BJ121. There are no other cars in the province. Most official cars are of this model, or the better JC212. "
"Local production... Could it be your 611 Institute or 132 Factory..."
Chang Haonan spoke at the same time. He tightened his coat tightly.
This car, which looks to be quite old, leaks air when running. It also has no heating equipment, so it can only rely on people to resist the humidity and coldness of this Sichuan winter.
Of course, he was used to this kind of climate in his previous life, but this body was still not used to it since it was his first time to spend the winter in the Yangtze River Basin.
“That’s not true.”
Seeing his appearance, Lu Yuying took out a pair of gloves from nowhere and handed them over, motioning to Chang Haonan to put them on:
"The Yema Bailu was led by Chengdu Auto Repair Factory and worked together with four automobile manufacturing and maintenance companies. However, Factory 132 produced some parts for them in the most difficult years."
"Before the 1990s, the development momentum of light vehicle factories has always been good. Unfortunately, in recent years, good foreign cars have continued to come in, and joint ventures have been established to produce them. The prices have also become lower and lower. It has been difficult to sell such low-end brands. ”
For Chang Haonan, this kind of thing is not new. After all, similar plots will continue to be played out in the next ten years.
Furthermore, judging from his experience along the way, the quality of this Mustang and Egret car is indeed unflattering.
For areas that do not directly affect national security, some things should be let go.
China's automobile industry must develop, but Chang Haonan has limited energy and cannot do everything himself. He can only rely on channels such as the Seiko Plan to spread the technological achievements of cutting-edge projects faster. .
As for who can benefit from this wave of technological dividends, it all depends on their own efforts and luck.
After all, the fate of a factory must not only consider its own struggle...
Chang Haonan and Lu Yuying chatted all the way about this car, about Chengdu, and various things about the aviation industry, and finally arrived in time for the sun We arrived at No. 611 before sunset.
“Now the comrades in charge of the No. 10 Project are following the final assembly of the No. 01 prototype in the 132 Factory. The place is a little deserted, but our J-7F project team is here, and we also give you, Comrade Xiao Chang A simple reception ceremony was arranged."
Perhaps he was worried about being rejected, so the latter continued:
"In addition to our 611 Institute and 132 Factory, there are also other participants. Other fraternal units in the project, especially comrades from several factories in Zhucheng, all came here specially. ”
"I also want to meet the comrades who built the city. It's not easy for them." Chang Haonan nodded slightly:
"But I still want to go to my residence first and pack my luggage."
If you just look at the map, Zhucheng does not seem to be much more remote than Chengdu. However, due to a series of factors such as history and topography, the economic level of the former is almost the same. Compared with their brother units, the development of 648 Research Institute and Guifei Institute (the merger of 130 Yunma Factory and 162 Shuangyang Factory), both products of third-line construction, is naturally not as satisfactory.
Currently, we can only rely on the JJ-7 model to maintain our production line and R&D capabilities.
Therefore, when Lu Yuying proposed the export-oriented J-7 improved plan, the city builders chose to join almost without thinking.
Considering that most of the future production capacity of Factory 132 will probably be placed on the production of J-10, Guifei Factory has a good chance of getting the production task of the new J-7 model, and 648 Research Institute can also take advantage of this project Work out the team.
In this most difficult moment in the military industry, only by finding a way to survive can we persevere until the day of dawn.
"No problem, I'll take you there right away. The conditions are definitely no worse than those at 601."
Lu Yuying patted Chang Haonan on the shoulder, and then motioned to the driver to move towards the road next to him. Take the path.
...
The dinner was held in the guest house of 611.
The scale is not large, at least not as good as after the successful test launch of Thunderbolt 11.
After all, it was a celebration.
Unsurprisingly, not long after the banquet started, after Lu Yuying introduced Chang Haonan to everyone, the topic at the scene gradually turned to aircraft design.
"Comrade Chang, we saw the turbojet 14B engine just shipped from Shengjing yesterday. Can you tell us about the difference between it and the old model in terms of inlet matching?"
Opened is an engineer from Liyang Factory.
When he was doing high-altitude platform testing at 624, he had a chance encounter with Chang Haonan.
As one of the participants and investors in the research and development of the J-7F, Liyang originally hoped to use its own turbojet 13FII engine as power.
But after seeing the turbojet 14 ground test with their own eyes, they immediately realized that it was a new model that could make a leap in aircraft performance.
But to recognize the reality clearly is to recognize the reality clearly, and there is still a certain degree of unwillingness.
“The main thing is the overflow resistance of the inlet in the transonic speed range.”
Chang Haonan put down the cup in his hand and explained to the other party:
“ In order to improve the overall performance of the engine, the final turbojet 14 engine has a boost ratio of 18.6, which is basically between a typical turbojet of less than 15 and a typical turbofan engine of greater than 20."
" Since the main installation target of the turbojet 14 was initially determined to be the J-8C with a high-altitude and high-speed orientation, the jet velocity was increased by increasing the temperature in front of the turbine and redesigning the afterburner to maintain its operating conditions above twice the speed of sound. Performance, at the expense of using a lot of new materials, the lifespan is almost no improvement compared to the old model.”
"However, the designed maximum speed of the J-7F aircraft is only about Mach 2.1. It is assumed that under combat conditions, the speed is mostly in the subsonic to transonic range. An excessively high jet speed is meaningless for our model, so I When designing the turbojet 14B, 606 was specifically required to reduce the temperature in front of the turbine and the jet velocity in exchange for longer life, higher reliability and lower fuel consumption.”
“But this is what happened. I have a question. The original inlet was designed by me based on the flow characteristics of the turbojet 13F engine. It is too big for the turbojet 14B. The air flow captured by the lip of the inlet is even greater than the flow required by the engine. and the amount of air release, the positive shock wave at the lip will be pushed out, causing the inlet to work in a subcritical state for a long time, resulting in a large overflow resistance.”
“I don’t know. Did I understand it clearly? ”
His explanation was concise and concise, and in a few words he explained the next step of the J-7F that needs to be optimized.
In fact, it is not impossible for the 611 Institute to complete this work alone, but it requires a little exploration of the appropriate starting point and matching sweet spot, which is far less efficient than Chang Haonan who understands the air intake characteristics of the aircraft and engine at the same time.
After all, we still have to rush to the first flight node.
The engineer who just asked the question didn't originally want to embarrass Chang Haonan, so he simply nodded, then raised his cup and gestured to Chang Haonan.
"In this case, Comrade Chang..."
Another young engineer from the 611 Institute spoke up.
“Just call me Chang Gong.”
Among people of roughly the same generation, Chang Haonan is still more accustomed to this title.
“Okay, then Chang Gong, since the key to the inability to match the old intake duct and the engine is that the intake air flow is too large, can we directly design a few bleed holes to increase the bleed volume of the intake duct? "
"No, of course not"
After hearing this question, Chang Haonan shook his head solemnly, then looked around and found something in the corner of the scene. He walked over to a blackboard, picked up the chalk and drew an abstract air intake diagram on it.
The reason why he paid so much attention to it was because he remembered that his previous research on the mandibular air inlet suffered a lot of setbacks here.
"In the subsonic state, there is no problem with the method you just said, but in the transonic range, the normal shock wave of the inlet wave system is located outside the inlet lip, between the free flow tube boundary and the wedge plate surface , the position of the air vent cannot be reached at all.”
“If it were an adjustable air inlet like the J-8C, it would not be a big problem, but the shape of the air inlet of the J-7F is fixed and there is no way to adjust it according to different speeds. , the entire air intake structure design must be optimized.”
Chang Haonan put down the chalk and turned around, and what he saw was a group of people either bowing their heads in thought or suddenly realizing.
At this point in the banquet, it has already begun to look like a technical seminar.
In order to make the atmosphere less bad, Chang Haonan put on a more relaxed expression and tone:
"Besides, don't you think the previous design was a bit too ugly? It's like...a toad with a big mouth."
"After switching to the new design, although overall The appearance is still the same, but... at least the mouth is not as big as it is now, and it needs to be coordinated a lot."
This description immediately made the atmosphere lively, and some people couldn't help laughing after hearing it.
In fact, the design of the mandibular air inlet is indeed inferior in aesthetics, but the J-7F and the US military's F8 and A7 are all fine.
What really breaks through the lower limit of aesthetics is the X32 fighter jet that has not yet come out, which is the technology demonstrator launched by Boeing to bid for the JSF project.
Toad's mouth is also used to describe this model.
The X32 ultimately lost to Lockheed Martin's X35. One of the very important factors was that the pilots of the three services expressed their unwillingness to fly such an ugly aircraft into the sky, which would affect morale too much.
Lu Yuying also raised his glass very appropriately at this time:
"Then I wish our new model can evolve successfully with the help of Comrade Chang Haonan!"
“Evolution successful!”
Everyone present echoed in agreement.
(End of this chapter)