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 use time, the progress is faster than initially expected. After Chang Haonan designed a satisfactory new nose, he also conveniently made the J-7 prototype larger The delta wing was changed to a double delta wing 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-7 for air combat based on the 3D model created 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. One 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. You just need to prepare paper content.
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 of people, 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 third-year undergraduates. Although they have almost completed professional courses, it is not easy for everyone to complete an aircraft design from scratch, even the simplest design.
Therefore, in general, 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 control aircraft. Many calculation examples are even directly imitated from textbooks.
This kind of homework will not get high marks, but it will not 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 screen of this era was not very clear, it was still possible to identify an aircraft with twin pontoons underneath the fuselage on the drawing, which immediately triggered a burst of whispers from the students behind.
“This is... a seaplane?”
“It seems to be able to carry people.”
“Yes, look at the dimensions marked on the paper, the plane has It’s 10 meters long. I’ll try it. As expected of Huang Zhiqiang, he really dares to do it..."
"Speaking of which, I remember that someone said they wanted to design a fighter jet before?"
"That should just be a talk. I think it would be difficult to design a truly manned aircraft. A fighter jet... ...I can’t even think about it.”
Huang Zhiqiang stood silent for a few seconds. Although he couldn’t hear what the people behind the classroom were saying, it was not difficult to imagine the shock of other students at this time. and admiration for oneself.
He enjoys this feeling.
“Good morning, fellow judges, our team’s design is a 2.5-ton seaplane that can carry up to 6 passengers.” “The overall design plan of the aircraft is as follows, with simple, reliable and good stability. The 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 in the design instructions. Pages 23-25..."
"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 description..."
I have to say that Huang Zhiqiang does have something. Although the structure of this seaplane is unremarkable, his design process is very detailed and complete, and he even made specific requirements for the mechanical properties of some key parts and carried out The overall performance estimate 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.
Including Chang Haonan, everyone applauded, sincerely.
"Brother Nan, why are you applauding them? Isn't your design much better than that seaplane?" Zhang Man clapped his hands absentmindedly twice and stopped.
“It’s 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, it can still include the double pontoons. Understood, at least at the level of a master's degree student," Chang Haonan commented very objectively.
“Brother Nan, you almost designed our fighter jet by yourself, isn’t it even more powerful?”
"Me...of course it's different."
Faced with Huang Zhiqiang's design plan, the four judges just asked two simple questions, mainly because the design description had already been written in great detail. , I really can’t find anything wrong with it.
"The next group, Chang Haonan, Zhou Shuwan, Zhang Man, Wu Yifan!"
After hearing his name, Chang Haonan took a deep breath and stood up, picking up the various items on the table. This material walked onto the podium. When he passed by Huang Zhiqiang, he seemed to feel that the latter was looking at him with a slightly provocative look.
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 is only so thin, which shows that it is an unfinished semi-finished product.
Stable!
"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 doesn’t look like the J-7 anyway.
"Dear judges and classmates, our group's design is a deeply improved model of the J-7 fighter jet." While Chang Haonan was speaking, Wu Yifan had also colored another of Zhang's cartoons. The renderings were projected onto a large screen.
This amazing topic, combined with the pictures on the big screen, almost directly ignited the atmosphere of 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 appearance, right?"
"I have read a lot of books, you can't fool me, why does the J-7 look like this?" Are you kidding us?”
(End of this chapter)