Chapter 72 Return to Beijing Airlines (Added update 25 for leader flankerr)
With the cooperation of two people, the new wing of the 83rd Project after major modifications was completed in only about 20 days. Design optimization.
The final simulation results show that the improved wing can greatly improve the maneuverability of the aircraft. The position where the aileron reaction occurs in the bomb-loaded state is greatly delayed, and the usable position at stall angle of attack and large angle of attack is Overload has also been significantly improved.
Of course, the specific performance data will not be known until the wind tunnel test is completed and the new wing is built and installed on the No. 04 demonstration aircraft for test flight.
In fact, if the Bayan Project is simply replaced with double delta wings, then there is potential for further improvement in performance in this area.
But this deviates from the original intention of the development of the J-8 model.
You must know that the performance of the 1471G radar that the Bayan San Project is expected to replace is almost comparable to the APG66 (V). It may even be directly replaced with the 1473 type derived from it in the future, which is the same as the J-10. It has a radar and the foundation of a twin-engine heavy interceptor, so the cost is not low.
With both Project 10 and Project 11 progressing smoothly, Project 83 can only be positioned as a specialized high-altitude, high-speed interceptor aircraft of the People's Air Force, taking a differentiated competition route and making two types of aircraft. Something that is not easy to do with third-generation machines.
So all changes currently made must be to optimize other performance as much as possible while ensuring its high-altitude and high-speed capabilities.
If it is turned into an aircraft with no obvious strengths and weaknesses, it will have no advantage at all compared to the future J-10 and J-11.
Under the guidance of this idea, combined with the current level of China's aviation industry, Chang Haonan asked himself that he was already the best in wing design.
In addition, while waiting for the calculation results, he also completed the explanatory document he had promised Xu Yang and handed it to him on the last day before leaving the Institute of Computing Technology.
......
Originally, Chang Haonan should have followed Yang Xia back to Shengjing after finishing work here.
But if we count the days, there are only a few days left before Beijing Hang University’s recommended postgraduate interview.
Although based on his current achievements, even if the confidential part of the 83rd Project is excluded, he can only rely on the first grade point in the whole grade, a paper in the "Journal of Aeronautics and Astronautics", and most importantly, the 603 application. As the first person to complete advanced technological achievements, this interview is just a formality.
But this cutscene still has to go.
Just like more than 20 years later, a professor from Beihang University became an astronaut and had to hold group meetings and preside over students' graduation defenses in the space station.
At this time in 1996, there were few places connected to the Internet. The upper limit of the Internet speed was generally 56K, and it could reach 128K in better conditions. It took a while to open the simplest web page, so online Interviews or something...
Don't even think about it.
Of course, considering Chang Haonan's special situation, the college also said that if he really can't come back, he can use a camera to record a video of a few minutes and play it on site.
However, he himself is in the capital now. After the wing improvement is completed, there seems to be nothing special to worry about in a short period of time.
More importantly, the very act of using video to participate in an interview has a sense of beauty that is worthless.
After thinking about it again and again, I decided to explain the situation to Yang Fenghata and go back to school to handle the matter of direct examination.
"Sister Xia, I want to have a phone call with Chief Yang."
Although this call had nothing to do with the specific content of the wing improvements, it did involve his and Yang Xia's schedules, so it was safer to contact them in a confidential manner.
"Telephone? But we will go back to Shengjing tomorrow or the day after tomorrow." Yang Xia looked at Chang Haonan with confusion and asked.
"Well... I have something going on at my school, and I may need to stay here in the capital for a few days."
The task Yang Xia received was to assist Chang Haonan, so she did not know how to To interfere with the other party's decision, he just led the latter to an office at the Institute of Computing Technology, where there were several red phones.
“You can use whichever one you want, I’ll wait for you outside.”
After saying that, Yang Xia turned and left the room. Chang Haonan quickly called Yang Fenghao's office and explained the situation to the other party.
“Of course that’s no problem.”
The reply over there was also very pleasant.
After all, Chang Haonan is not from Institute 601, and in the past month or so, he has made great contributions to the entire August 3rd Project.
Even just discovering wing design flaws in advance is equivalent to saving several months of time on the project.
Not to mention that he directly solved this problem and even optimized the low-altitude and low-speed control problem that has troubled the J-8 for many years.
"In that case, I'll ask Engineer Xu Jinxu to come over for you and ask him to bring the data back with Yang Xia."
Obviously, due to the importance of this data, we can't just For Yang Xia to take it back alone, she must be accompanied by a second person with the same secret level.
Xu Jin is the old engineer Lin Shikuan mentioned before, and he met Chang Haonan at the first progress seminar.
The arrangement was quite thoughtful, so the latter naturally couldn't have any objections.
In addition, perhaps considering that after the wing design improvement work is completed, it will take some time to manufacture a new wing, Yang Fenghao even granted a half-month holiday so that Chang Haonan can concentrate on the school. Things over there, take a good rest by the way.
Of course, if there is an emergency in the meantime, you still have to ensure that you are on call.
So, the next morning, after completing the handover with Xu Jin, who rushed to the capital after a long journey, Chang Haonan finally returned to Beijing Hang University again.
It is already mid-August, just in time for the 1996 freshman class to register——
Because of military training, they arrive at school about half a month earlier than the older students.
As a result, the school entrance was crowded with some bewildered new students as usual, as well as parents who came to see off their students. It took Chang Haonan a lot of effort to finally squeeze into the school.
"Hello, classmate, do you need..."
Before he could recover, he heard a somewhat familiar voice.
"Old Wu?"
Chang Haonan raised his head and saw Wu Yifan standing under a parasol on the roadside, obviously thinking that he was a new student with a suitcase in his hand.
"Let me go, Nanshen?"
The other party obviously recognized Chang Haonan: "Why did you come here so early this year?"
Then he immediately realized something. , and answered by himself: "Oh, yes, you have to prepare for the postgraduate interview..."
"Ahem...don't talk about this." Chang Haonan waved his hand: "What are you doing? ”
Not far behind Wu Yifan, there were twenty or thirty junior students who looked like they should be sophomores or juniors at the beginning of school.
There are three tables placed a little further away, filled with several cardboard boxes, which seem to be small things such as IC phone cards, tape recorders, and electric kettles.
"Hey, I'm not as capable as you. I let Academician Du decide to go to graduate school, so I can only take advantage of this opportunity to make a little money..."
I'm so worried today. Okay, I will continue to add more updates tomorrow
(End of this chapter)