Chapter 13: You told me this is called J-7?

In the following more than half a month, Chang Haonan has maintained a selfless working state: getting up early in the morning, in addition to attending class, he also conducted design calculations and performance tests on several types of air intakes.

Since there is no longer a limit on computer usage time, the progress is faster than initially expected. After Chang Haonan designed a satisfactory new nose, he also conveniently changed the large delta wing of the J-7 prototype into a double-winged one. Delta wings to enhance maneuverability at subsonic speeds.

Although this improvement has been implemented on the J-7E, it is active equipment after all. It is impossible for Chang Haonan to get the design drawings casually, so he still has to spend time to redesign a similar one.

After all the design work was completed, Zhang Man even drew two imaginary drawings of this modified version of the J-3 for air combat based on the 7D model modeled by Chang Haonan.

The course design defense is somewhat similar to the graduation project defense, except that the scale is much larger. The scene will be set directly 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 back. a row.

In this era, classrooms were not generally equipped with computers. There was only a writing projector, which could project drawings placed flat on the carrier glass onto a large screen. The effect was actually similar to using a projector to display PPT, but you needed to prepare paper. It’s the content that matters.

Under normal circumstances, neither other students nor the judges and teachers 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 defense review of the course design assignment.

When Chang Haonan came to the classroom, it was almost full, so he had to take the other three people to find a seat by the window at the end of the classroom.

They are all junior undergraduates. Although they have already taken professional courses, it is not easy for everyone to complete an aircraft design from scratch, even the simplest design.

Therefore, under normal circumstances, the scoring of this assignment will focus more on whether the design ideas and design processes of each group are correct.

After all, there are very few groups that can completely design a real "aircraft".

Unsurprisingly, the designs of the first few groups are very satisfactory. They are basically model-sized remote-controlled aircraft, and many calculation examples are even directly copied from textbooks.

This kind of homework won't get high marks, but it won't make any big mistakes. The judges' questions are also step-by-step, and a group can be finished in about fifteen minutes.

The somewhat dull atmosphere lasted until Huang Zhiqiang's team came on stage.

Huang Zhiqiang personally placed a thick book of bound design instructions on the table in front of the judges.

"Seaplane? It's 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 design drawing under the condenser of the writing projector.

Although the projection images of this era were not very clear, one could still make out the drawing showing an aircraft with twin pontoons underneath the fuselage, which immediately triggered a burst of whispers from the students behind.

"Is this...a seaplane?"

"It seems like it can carry people."

"Yes, look at the dimensions marked on the paper. The plane is 10 meters long. I'll give it a try. As expected of Huang Zhiqiang, he really dares to do it..."

"Speaking of which, I remember someone said they wanted to design a fighter jet?"

"That should just be said. I think it would be very difficult to design a truly manned aircraft. A fighter jet... I can't even think of it."

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

He enjoyed this feeling.

"Good morning, judges. Our team's design is a 6-ton seaplane that can carry up to 2.5 passengers."

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

"First of all, we will introduce the appearance characteristics of seaplane floats and their impact on fluid dynamics..."

"The theoretical calculation method of aircraft floats is as follows. The specific calculation process can be found on pages 23-25 ​​of the design instructions..."

"The shape and frame design of the buoy are shown in the figure. The specific process of calculating the external load of the buoy can be found on pages 32-37 of the design instructions..."

It has to be said that Huang Zhiqiang does have something special. Although the structure of this seaplane is unremarkable, his design process is very detailed and complete. He even made specific requirements for the mechanical properties of some key parts and conducted an overall The performance estimation should be said to be a fairly complete design plan.

It took Huang Zhiqiang just half an hour to introduce his plan. When he said thank you to the teacher and classmates, the whole classroom burst into warm applause.

Everyone including Chang Haonan applauded, sincerely.

"Brother Nan, why are you applauding them? Isn't your design much better than that seaplane?" Zhang Man absently clapped his hands twice and stopped.

"It is not easy for four people to design to this level in less than a month. Although the entire body part obviously draws on existing mature designs, if you can figure out the double pontoons, you can at least be considered a master. The level of students." Chang Haonan commented very objectively.

"Brother Nan, you almost designed our fighter jet by yourself. Isn't it even more powerful?"

"Me... naturally it's different."

Facing Huang Zhiqiang's design plan, the four judges only asked two simple questions. The main reason was that the design description was already written in great detail and they really couldn't find any faults.

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

After hearing his name, Chang Haonan took a deep breath and stood up, picked up various materials on the table and walked to the podium. When he passed by Huang Zhiqiang, he seemed to feel that the latter was using a slightly provocative way. looked at him.

Chang Haonan shook his head with regret.

Huang Zhiqiang is indeed very capable, 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 description on the table in front of the judges.

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

After seeing this design description, Huang Zhiqiang was completely relieved - the design content of a fighter jet was only so thin, which showed that it was an unfinished semi-finished product.

Steady!

"Improved J-7?" Liu Hongbo frowned as he looked at the title written on the cover. On the one hand, he felt that this group of students might be trying to fool around with a half-finished product. On the other hand, there was another picture under the title. The sketched renderings look...

It’s not like the J-7 anyway.

"Dear judges and classmates, our team's design is a deeply improved model of the J-7 fighter jet." While Chang Haonan was speaking, Wu Yifan had already projected another colored rendering of Zhang's comic onto the big screen. superior.

This amazing topic, combined with the pictures on the big screen, almost directly set off the atmosphere in the entire classroom.

"Holy shit, are you really designing a fighter jet?"

"Can you be more awesome than Huang Zhiqiang? Have you finished the plan? Don't just design a rough shape, right?"

"I've read a lot of books, so you can't fool me. Why does the J-7 look like this? Are you kidding us?"