In the following more than half a month, Chang Haonan has maintained a state of selfless work: getting up early in the morning, in addition to class, is to carry out design calculations and performance tests on several air intakes.

Because there is no time limit for the use of the computer, the progress is faster than expected at the beginning, so that after Chang Haonan designed a satisfactory new nose, he also easily changed the large delta wing of the J-7 prototype to a double delta wing to enhance the maneuverability in the subsonic state.

Although this improvement has been realized on the J-7E, it is active equipment after all, and Chang Haonan can't get the design drawings casually, so he still has to take the time to redesign a similar one.

And after all the design work was completed, Zhang Man even relied on the 3D model modeled by Chang Haonan to draw two imaginary drawings of this magic modified version of the J-7 for air combat.

The defense of the course design is somewhat similar to the defense of the graduation project, but the scale is much larger, and the scene will be directly set up in a large classroom, with dozens of students from the entire major sitting in the back, and several judges, including Liu Hongbo, sitting in the first row.

In this era, classrooms are not generally equipped with computers, only a writing projector, which can project drawings flat on the carrier glass onto a large screen, and the effect is actually similar to using a projector to play PPT, but you need to prepare paper content.

Under normal circumstances, neither other students nor the judges have seen the design plans of each group before, so a good-looking rendering can leave a deeper first impression on the audience.

Soon, it was time for the course design assignment defense review.

When Chang Haonan came to the classroom, the people inside were almost full, so he had to take the other three to find a window position in the innermost part of the classroom.

They are all junior undergraduates, and although the professional classes have been almost completed, it is not easy for everyone to complete an aircraft design from scratch, even the simplest design.

Therefore, in general, the grading of this assignment will pay more attention to whether the design ideas and design process of each group are correct.

After all, there are very few groups that can design a true "airplane" in its entirety.

Not surprisingly, the design of the first few groups is very decent, basically the size of a model airplane, and many examples are even directly copied from the textbook.

There will be no high marks for such assignments, but there will be no big mistakes, and the judges' questions are also step-by-step, and a set can be completed in about fifteen minutes.

The somewhat dreary atmosphere lasted until Huang Zhiqiang's group came on.

Huang Zhiqiang personally put a thick bound design description on the table in front of the judges.

"Seaplanes? Kind of interesting......"

Liu Hongbo finally became interested and put on the glasses that had been on the table before.

The other three teachers also cheered up almost instantly.

At the same time, another person also placed the blueprint under the condenser of the writing projector.

Although the projection picture of this era is not very clear, it is still possible to make out that the drawing depicts an aircraft with double pontoons under the fuselage, which immediately caused a whisper from the students behind.

"It's ...... Seaplane? ”

"It seems to be able to carry people."

"Yes, you look at the size marked on the paper, the plane is 10 meters long, I'll take it, it's worthy of Huang Zhiqiang, I really dare to do it......"

"Speaking of which, I remember that there seemed to be people who wanted to design fighter jets?"

"I think it's hard to design a really manned plane, fighter jet...... I can't even think about it. ”

Huang Zhiqiang stood on the podium and was silent for a few seconds, although he couldn't hear exactly what the people behind the classroom were saying, it was not difficult to imagine the shock and admiration of the other students at this time.

He enjoyed it.

"Good morning, judges, our team has designed a 2.5-ton seaplane that can carry up to six passengers."

"The overall design scheme of the aircraft is as follows, using a simple, reliable and stable double-pontoon structure......"

"First, the shape characteristics of the seaplane pontoon and its influence on hydrodynamics are introduced......

"The theoretical calculation of the aircraft pontoon is as follows, and the specific calculation process can be found on pages 23-25 of the design description......"

"The shape of the pontoon and the design of the bulkhead are shown in the figure, and the specific process of calculating the external load of the pontoon can be found on pages 32-37 of the design description......"

I have to say that Huang Zhiqiang does have something, although the structure of this seaplane is mediocre, but his design process is very detailed and complete, and even made specific requirements for the mechanical properties of some key parts, and made an overall performance estimate, it should be said that it is a fairly complete design scheme.

It took Huang Zhiqiang half an hour to introduce his plan, and when he said thank you to the teachers and students, the whole classroom erupted in warm applause.

Including Chang Haonan was applauding, sincerely.

"Brother Nan, what kind of applause do you give them, isn't your design much more powerful than that seaplane?" Zhang Man clapped his hands twice absentmindedly next to him and didn't continue.

"It is not easy for 4 people to design to this extent in less than a month, although the entire body part obviously draws on the existing mature design, but it can be calculated and understood by the double pontoons, at least it can be regarded as the level of master's students." Chang Haonan commented very objectively.

"Then Brother Nan, you almost single-handedly designed our fighter jet, isn't it even more powerful?"

"Me...... Nature is different. ”

In the face of Huang Zhiqiang's design plan, the four judges only asked two simple questions, mainly because the design description had been written in great detail, and they really couldn't find anything wrong.

"The next group, Chang Haonan, Zhou Shuwan, Zhang Man, Wu Yifan!"

Chang Haonan, who heard his name, took a deep breath and stood up, picked up the various materials on the table and walked onto the podium, and when he passed by Huang Zhiqiang, he seemed to feel that the latter was looking at him with a slightly provocative gaze.

Chang Haonan shook his head with some pity.

Huang Zhiqiang's ability is indeed very strong, but after this period of contact, he can feel that there is a problem with the other party's mentality.

But now is not the time to worry about others, Chang Haonan also put his design instructions on the table in front of the judges.

The thickness is only about half of Huang Zhiqiang's book.

After seeing this design description, Huang Zhiqiang was completely relieved - the design content of a fighter jet is only so thin, which is enough to show that it is a semi-finished product that has not been completed.

Steady!

"An improved version of the J-7?" Liu Hongbo looked at the title written on the cover and frowned, on the one hand, he felt that this group of students was probably going to make a half-finished fool, and on the other hand, there was a sketched rendering under the title, which looked ......

It's not like the J-7 anyway.

"Judges, teachers, students, the design of our group is a deeply improved model of the J-7 fighter." While Chang Haonan was speaking, Wu Yifan had already projected another colored rendering of Zhang Comic onto the big screen.

This amazing topic, combined with the pictures on the big screen, almost directly detonated the atmosphere of the entire classroom.

"I'm grass, really designing fighter jets?"

"Can it be more awesome than Huang Zhiqiang? Is the plan done? Don't just design a rough shape, right? ”

"I read a lot of books, you can't fool me, why does J-7 look like this? Kidding us, huh? ”