Siheyuan: Heavy Industry Revitalizes the Country

WP-7 is a very representative aircraft in China.

It is also a very milestone aircraft engine.

It served successively in J7, J8 and J7II.

There are subsequent models such as A, B, BB, and BIII.

Development continued into the 90s.

This shows that it is a very classic engine.

But on the other hand, it also shows that it was a helpless choice due to the insufficient national strength and lack of funds at that time.

It was not until the 21st century, when the economy improved, that sufficient funds became available.

In just twenty years, many subsequent products have been updated and replaced like a blowout.

But in fact, many theories have already appeared and even been verified as early as the 7s to 90s.

The WP-7 laid a solid foundation for the advanced theories of later generations.

But now, WP-7 is just a newborn baby.

Very fragile.

The total lifespan does not even reach 300 hours.

Moreover, it has to be dismantled for major repairs and maintenance in less than 100 hours.

As a compulsory course in the Department of Aeronautics and Astronautics, the course on aircraft engines.

The development history of WP-7 is explained very thoroughly.

So Fang Xiang can be said to be very familiar with the WP-7.

It is also clear that even if the most advanced turbojet 7B III is taken out now, the country cannot produce it.

As mentioned earlier, many key parts that are resistant to high temperatures require materials and accessories.

It has not been developed and researched yet.

Moreover, as the engine of the Baye, the applicable model is the WP-7A.

It is the same model as the turbojet 7B used by Qi Ye.

It was subsequently updated in several batches, all the way to batch 05.

By the end of the 80s, the 8th generation had been equipped with a new engine, the WP-13.

Of course, it cannot be made now.

Therefore, Fang Xiang’s reference object this time is the turbojet 7A batch 05.

Compared with the initial model of WP-7, the structure has been optimized and an air-cooled turbine is adopted.

And more advanced technologies are used in fuel supply, injection and combustion chamber.

This improves the engine's combustion efficiency to a higher level.

In fact, the changes in data such as increased thrust, reduced fuel consumption, and increased air flow are not very obvious.

The most important thing is that the service life and first overhaul period are greatly extended.

In short, the upper limit is higher and it can be used for a longer time.

Of course, it still cannot be compared with the WP-13.

After all, WP-13 uses titanium alloy on a large scale.

Titanium alloy has only been developed in China for a few years and has not yet reached the production stage.

The United States' titanium alloy technology did not begin to be widely used in engines until the late 60s and early 70s.

Not to mention the rabbits which are even more backward now.

But now, it is not unusable without titanium alloy.

After all, even stainless steel has a melting point of 650-1450 degrees.

The highest temperature of the WP-7 is just over .

Therefore, it can still be used in some key parts.

A more ingenious design is needed to make up for the lack of materials.

Don't forget that in a few years, there will be the Mi-25, which has suppressed the United States and NATO for many years.

That thing is a stainless steel airplane that flies with pure force.

And, coincidentally, because the Mi-25 is too weird.

Fang Xiang also had a deep understanding of it, but now was not the time to bring it out.

With a reference, the design work of WP-7 will undoubtedly be easier.

But the ease is limited.

After all, the WP-7 is an aircraft engine, and its structure is many times more complicated than that of a gasoline engine.

It may be a bit of an exaggeration to say that the complete design drawing is one meter high.

But half a meter high is still necessary.

So, when Fang really wanted to start painting, he discovered.

One month doesn't seem to be enough time to draw two copies.

Yes, at the beginning, Fang Xiangyou planned to draw two copies.

A turbojet 7A05 batch, for Uncle 8 to use.

One is the WP-7B III, for Master 7 to use.

We plan to use these two engines to establish our rightful position in the aviation industry.

The last time I designed the 213 jeep, Cao Tianwei and his entire team were there to help me.

You only need to draw the key positions and non-repetitive areas.

The rest are done by team members.

Therefore, the drawing, which was more than one meter high, was completed in just over a month.

And this time, I'm alone.

The efficiency is definitely not as good as last time.

Moreover, there are still two courses to substitute.

Time is already very tight.

But fortunately, Professor Xu's classes did not require him to teach many classes.

Guan Ningyuan came back just after the school started, and he could share some of the responsibilities.

As for Professor Li, he actually had no intention of exploiting him.

I just gave him the introductory theoretical course, Introduction to Aeronautics and Astronautics, for his freshman year.

This reduced a lot of his pressure as a substitute teacher.

Since they are all basic classes, there is no need to prepare a lot of courseware in advance.

In addition, Fang Xiang had taken too many courses in his previous life to count, from freshman to doctoral level.

Just like a video, you can store it in your mind and call it up at any time. Just follow the instructions.

After trying to substitute teach once, I quickly got into the state.

Apart from substitute teaching, I spent all my time drawing.

But even so, a lot of time is still wasted at the beginning.

Because the students in the Department of Mechanical Manufacturing were surprised to find out.

The person who taught them was actually Fang Xiang, who studied with them last year.

The shock this brought to them is really worth pondering.

Especially Ji Pengwei.

"What's wrong with you? Why are you here to teach us?"

The bell had just rung after I substituted for a class in the Mechanical Engineering Department for the first time.

Ji Pengwei stopped Fang Xiang who was trying to escape.

"I graduated, didn't I tell you?"

Fang Xiang looked at Ji Pengwei with a surprised look on his face, and then he remembered his graduation.

It seems that it hasn’t been made public yet, and they don’t know about it.

"Huh? You graduated? How did you do that?"

Ji Pengwei can play on Shuimu, so he naturally has a certain talent.

Although I am not as good as those top geniuses, I know clearly how difficult the university courses are.

Moreover, objectively speaking, college students of this era are better than college students of later generations.

There are many with higher gold content.

It would not even be an exaggeration to say that they can be compared with graduate students.

“I was with Professor Xu before and participated in several projects.

The progress is relatively fast, and I learn quickly too.

Combining the two, you graduate."

Fang Xiang naturally wouldn't say that he forgot to drink Meng Po soup and traveled through time with the memory of the future.

I could only find an excuse that barely counts as a reason.

"Do you think I will believe you?"

Ji Pengwei's eyes changed. How could he be fooled by such a trick for fooling children?

"Then do you believe that geniuses exist in this world?"

Fang Xiang realized that he couldn't fool people anymore, so he just started talking about metaphysics.

"I believe it, but I don't think you are like that!"

Ji Pengwei's expression at this moment was clearly visible on his face, except for a roll of his eyes.

"Oh! Believe it or not, I can get my diploma anytime.

I will also be the one teaching your next few professional courses.

I won’t talk to you anymore, I have other projects on hand and I’m very busy.”

Fang Xiang touched his nose and realized that he couldn't hide it, so he planned to slip away.

"Wait! What project do you have? Can I participate?"

Ji Pengwei grabbed Fang Xiang, his eyes full of desire.

"Aerospace engines, do you understand?"

Fang thought that there was no one around, so he didn't plan to hide it from him, but he wouldn't tell him everything either.

I just gave a brief overview.

"I don't understand... Is there anything I can do?"

Ji Pengwei's eyes dimmed.

Unexpectedly, we met again, classmates who studied mechanical theory with me last year.

Not only has he graduated this year, but he is also working on more advanced aircraft engines.

The gap in his heart was almost unacceptable to him.

Over the past year, he has watched Fang Xiang come step by step, although he is not clear about many details.

But he is neither stupid nor foolish, and he knows that if he can follow Fang Xiang, there will definitely be a future for him.

Therefore, I don't intend to give up any possibility, especially this kind of gold-plating project.

"Hmm... a drawing club, right?"

Fang thought of the turbojet 7, the half-meter-high blueprint. If he finished drawing it himself, he would be blind.

If anyone could help draw some non-important, non-critical parts.

Maybe I can feel more relaxed.

"Yes! Can I participate?"

Ji Pengwei's eyes lit up instantly.