The test of the combustion chamber here was in full swing for three days, and Yang Hui was on the two points and one line between the test site and his own power system project team, and Yang Hui, the body design on Yang Yue's side, had no time to go there.

Yang Hui is like this, if you can do the appearance, you can do the structural design, this is completely blind, and you will not care about the structural design when you will do the test flight in your later life, there are too many majors in the aviation industry, and it is impossible to produce all-rounders.

There are two things to be happy about, the test center over there has burned the combustion chamber and scrapped one normally, and the test reports have to be summarized, and the final results will be available in about three days.

Another thing is that Zhong Jianjian's centrifugal impeller has been designed, and now Yang Hui is rushing to the drawings of the centrifugal impeller, as for what Zhong Jianshe is doing? Sleeping, of course.

Zhong Jianshe also stayed up several nights in order to catch up with the design of this centrifugal impeller, Zhong Jianshe slept at four o'clock in the morning last night, and got up again at seven o'clock, carrying two and bigger dark circles to work, Yang Hui hurriedly took over the design data of Zhong Jianjian, and let Zhong Jianshe sleep on the table. Although the impact is not good, everyone knows what is going on when they also do scientific research.

The design of the centrifugal compressor wheel of Zhong Construction is very interesting, and the compressor wheel is integrated and directly cast, which looks quite concise. However, I am afraid that there will be trouble in casting, this compressed wheel surface is still quite a lot, not to mention the yield of casting, just to make the model will take a lot of effort.

As a turbine type of machinery, the number of revolutions in use is quite high, the maximum speed can reach 100,000 to 200,000 revolutions per minute, at such a high speed, it is necessary to take into account the heating situation of the centrifugal impeller in high-speed rotation, Zhong Jianshe has considered a variety of structural methods in the data, but finally uses finite element analysis to obtain an optimal structure.

Seeing the use of finite element for analysis here, Yang Hui was quite surprised, one is that finite element this thing only began to develop rapidly after the 70s, and now this is still a top analysis method, I didn't expect Zhong Jianshe to use it, it seems that there are experts in the university.

Another surprising problem is that this finite element analysis was finally made, it seems that Zhong Jianshe is trying to find a way to find a computer, finite element this thing without a computer is really only blind. Of course, even if there is a computer, it is very difficult, and it still requires some technology to calculate the speed of the computer in the base now.

Regardless of how the finite element is calculated, continue to look down, and the centrifugal force and high temperature load of the compressor wheel are calculated, and finally the tensile and strength limits are calculated according to the material characteristics and the two values of the impeller heating, and the gap between the impeller and the casing is calculated clearly.

The general process of the data of each calculation is roughly recorded, which fully shows that the design of this centrifugal impeller is very painstaking, and many things are calculated only after finding that they are not correct, and then calculated again. The project team has just graduated from the bachelor's degree, so it can be said that there is no design experience, and I don't know how much I have done. After Yang Hui checked the information from beginning to end, he changed a few small places, but they were irrelevant.

After confirming that there was no problem, Yang Hui began to work on a technique that had not been touched for many years: mechanical drawing. Mechanical drawing has generally been replaced by computer drawing in later generations, of course, there are still some manual ones, but they are relatively rare. In the aerospace manufacturing industry, the use of computer drawing is more common, and finally the drawings can be printed directly, as for the paperless production, this is still difficult.

Although computer drawing has replaced manual work, the basic things of drawing still need to be known, the computer only replaces paper and pen, but it still needs to be operated by people, and Yang Hui has not forgotten the requirements for drawing.

Start with the drawing frame, title bar, and normals, and draw step by step below. Naturally, there were bumps and bumps along the way, and it was often necessary to erase the drawn lines with an eraser, and then leave shallow traces.

In the end, although a drawing was completed, almost this drawing was about to be scrapped, the drawings were dirty, Yang Hui himself was embarrassed, and in the end he could only be invalidated, so he went out to destroy the drawings under the pretext of going out.

When Yang Hui came back, Zhong Jianshe had already woken up, looking at his information in a daze. At this time, Yang Hui naturally had no way to continue painting, the data was gone, what else to paint?

After handing over the drawings to Zhong Jianjian, Yang Hui began to make his own project 'oil supply system', when the project was assigned, but each person had two small items, and Yang Hui received it himself: combustion chamber and oil supply system.

The oil supply system is relatively simple, to put it bluntly, it is just a bunch of oil pipes. At most, it is how to control the amount of fuel, but it can be solved by simply adding two fuel valves and propane valves, which should have a finished product, no need to design. The only thing that needs to be bothered is the tubing wiring, which can effectively reduce the number of bends of the tubing and improve reliability.

Three days Yang Hui's design of the fuel supply system has come to an end, the final design Yang Hui although a little dissatisfied but there is no way, in 83 years don't think about electronic control, honestly do mechanical control well, although the end does not look beautiful, but this is not a problem, the engine, the guy installed in the model airplane, ugly will endure it.

Now Yang Hui is more worried about what the model aircraft control system is doing, now this model aircraft to achieve ground control is probably only to use a backward tube integration to control, as for whether there will be a delay, I don't know, anyway, the speed is not as fast as the transistor.

Now no matter how worried you are, there is no way, you can only pin your hopes on the military quality of the base, and the military quality will be relatively better.

Immerse yourself in the finishing work of the oil supply system, such as drawing is still indispensable, but drawing some pipelines is relatively simple compared to drawing complex machinery, and it will not take long to draw the drawings.

If the inspection is correct, it must be submitted for review, review, and finally signed with the name before it can be regarded as an official drawing, and then it can be handed over to the factory for trial production.

It was another early morning Yang Hui and Zhong Jianshe went to different factories to find someone to try out parts, Yang Hui came back relatively early, and his was just some pipelines, which were easy to do. On the contrary, the centrifugal impeller is really not easy to do, and it needs to be cast, and in the end, there may not be a few qualified finished products.

Zhong Jianshe was obviously worried about this problem, sitting there still thinking about the impeller casting, and he didn't even start to design his diffuser, which is relatively rare for a workaholic, and it also reflects the difficulty of this centrifugal impeller casting from another aspect, and even the designer does not have much confidence.

After being worried for two days, Yu Zhong Jianshe came to call Yang Hui and went out on the third day.

"Team Leader Yang this afternoon, the foundry over there has a casting task today, and you can use the excess molten iron to cast the centrifugal impeller today, and it is said that a total of ten impellers will be made."

This luck is also better, the day before yesterday at noon to send the drawings over, today under the finished product can be produced, the time is really more appropriate. However, there are a total of ten impellers, I don't know how many impellers can be made, this is the first casting, and there are many complex surfaces, I don't know how many can be made in the end, and it is not impossible to scrap them all. Yang Hui was worried along the way

When they came to the factory, they learned that the foundry workshop was starting there, and immediately rushed to the foundry workshop, just to be able to watch the casting of the impeller, although they went to no avail, at most they watched the molten iron being poured into the mold from afar.

Sure enough, when we arrived at the foundry, the casting task in the factory had been completed, and the remaining workers were helping to cast the ten centrifugal impellers.

In a few minutes, the molten iron has been poured into the mold, and the one who promised Zhong Jianshe to help cast the impeller saw Zhong Jianshe and walked out quickly to say something, as for the casting task in the workshop, the rest is responsible for the special person, and the grain growth control in the cooling process is more meticulous, and it is more normal for the special person to be responsible.

"Comrade Zhong Jianjian, right, let me tell you, I made ten models, and I wasted the boss's strength, but there is not much molten iron left here this time, and only eight can be cast." With a thick voice, I heard what this person said from afar.

Only eight have been cast, and I am afraid that the probability of producing a finished product is even smaller, and Yang Hui is even more optimistic about this casting.

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