Chapter 283 Both are flying in the sky, one is tall and the other is short
With the technology and environment of this era, it is not realistic to develop photovoltaics on a large scale. However, it is not a big problem to solve the electricity needs of daily scientific research in the desert and to use it for aerospace in the future.

But forget about powering the centrifuge. When it comes to using centrifuges in the desert, it’s not just one or two machines.

Gao Zhendong doesn't know about this now. He is answering a confidential call from someone he hasn't seen for a long time.

——Wang, chief engineer of LYP-6 aero engine.

Chief Engineer Wang called with only one purpose, to ask about tungsten-molybdenum alloy.

"Director Gao, I just received a notification that your factory has produced a new material?" This was a question asked despite knowing the answer, but the purpose was not to confirm whether the Third Rolling Mill had produced a new material, but to confirm whether it was done by Gao Zhendong.

The notice only says which factory did what, but does not mention the name of the researcher.

But for Chief Engineer Wang, with the 591 model as an example, his first reaction was that this thing was most likely the work of Gao Zhendong.

So he simply called. After all, looking at the information in the notice was not as clear and direct as asking the person directly.

"Well, yes, yes, yes, Mr. Wang, do you have any guidance? I am quite familiar with this material, hehe."

The meaning of this sentence is quite obvious. It doesn't say it directly, but it says everything.

"That's great. I was just about to ask you. The report only said that the core melting point is 2600°C, and didn't mention much else, so I came to ask you, haha."

It seems that they want to use it on the engine, but I don’t know whether it is LYP-6 or a new engine.

"Mr. Wang, this material has good processing performance and decent mechanical strength, but my opinion is that if it is used in a turbine, it is not recommended to use too much. The specific gravity of this material is a bit high, about 17 grams."

Mr. Wang was delighted when he heard this: "Haha, as long as the processing and mechanical properties are good, 2600°C is too high for us at this stage, and it is not necessary to use it on turbines. What do you mean by not recommending using too much?"

Gao Zhendong said: "If you want to use it, just use the first-stage turbine. The weight cost is acceptable. If there are more, the thrust-to-weight ratio will be greatly affected."

The temperature of the first stage is the highest, and becomes relatively lower as it goes on. This is indeed used in future aero engines, but whether it is suitable for LYP-6 or other engines of Mr. Wang requires professional knowledge.

Mr. Wang hesitated for a moment and said, "I was originally planning to use it on valves, pipe fittings, nozzles and the like, but your suggestion is not unreasonable. We have to do the math and see what the pros and cons are."

Gao Zhendong stopped giving any more advice. After all, Mr. Wang and his team were the professionals in this area. He just said, "Mr. Wang, if you need detailed information, I'll ask the comrades in the confidential office to send you one right away."

This was Chief Engineer Wang’s purpose, and he said yes repeatedly: “Okay, okay, thank you.”

After hanging up the phone, Gao Zhendong immediately started to arrange this matter. An hour later, Chief Engineer Wang received the data.

As for why it was so fast, we have to ask Gao Zhendong himself and the comrades of the Defense Work Committee.

Multi-pass encryption, trustworthy!

Mr. Wang got the information about tungsten-molybdenum alloy and couldn't wait to open it and read it.

"Hiss, this proportion is a bit high."

"But this performance is also very good. Director Gao really gave me a difficult problem, haha."

Chief Engineer Wang was talking to himself while calculating based on the data sent by Gao Zhendong.

Although it is troublesome, I am happy.

Fortunately, I have the DJS-59. All the turbine-related calculation programs for using the 591 are there. I can call them up from the tape and modify some corresponding parameters to do the calculation. This is much faster than taking out paper and pen, taking out slide rule and abacus, and starting from scratch.

While calculating, Chief Engineer Wang was amazed at Gao Zhendong's versatility. He felt like he was trapped in his encirclement. The materials, tools, supplies, and calculations were all done by him.

After fiddling with the computer for a while, Chief Engineer Wang breathed a sigh of relief.

In general, this material's relatively high melting point and other properties make it very suitable for use in turbines, but its heavy weight completely eats up the thrust benefits it brings.

However, Director Gao's words make a lot of sense. The first stage or the first two stages can be used to increase the temperature before the turbine.

Although the density of tungsten-molybdenum alloy is too high, we are not at a loss because we have increased the temperature before the turbine, right?

As for the later stage, the gas temperature has dropped, so 591 can be used. This can increase the temperature before the turbine without being greatly affected by the density of tungsten-molybdenum alloy.

After all, the temperature before the turbine is not always high, and the engine thrust is also affected by many conditions. It is OK if it can be properly increased to a certain extent. After preliminary calculations, under the current conditions, if tungsten-molybdenum alloy is used as the first-stage turbine, the engine thrust can be increased by several points, and the thrust-to-weight ratio can be slightly increased.

This is incredible. Even though there are only a few dots, when technology reaches a certain limit, it is very difficult to pick out even one dot.

And the thrust-to-weight ratio has also increased slightly, which is even more impressive.

Mr. Wang turned off his computer, closed his laptop, and called Gao Zhendong, but this time he did not use the confidential channel.

The call was finally connected. Chief Engineer Wang said nothing else but two words without thinking: "Thank you!"

Gao Zhendong knew it well, and didn't say anything else. He just laughed and said, "You're welcome. I'm glad I can help."

The butterfly flapped its wings slightly again, which made Gao Zhendong very happy.

What he is doing now is also flying in the sky, but it is flying lower, and it is also using an engine.

——The rocket engine of the anti-tank missile, just tell me whether it flies or not.

After reaching a cooperation agreement with Changjian Machinery Factory and the user, Changjian Factory has started to develop the warhead and the line-releasing mechanism. The first step that Gao Zhendong is responsible for is the rocket engine.

Considering that Changjian Factory needed to get the rocket engine for testing as soon as possible, although it would take time for them to make the warhead and the wire-releasing mechanism, Gao Zhendong still planned to draw the diagram of the rocket engine as soon as possible, and then have the Third Rolling Plant trial-produce the shell, and Changjian Factory would load the solid propellant according to Gao Zhendong's design.

Since the two major processes involve transferring orders between two factories, the procedures and processes may be cumbersome, so Gao Zhendong tries to put this matter first.

If we take firecrackers as an example, the solid rocket engine seems very simple, with a shell (qiao, fourth tone) on the outside and a bunch of gunpowder inside, and that's it.

But when you really get started, it is actually more than that simple. The shell, propellant, combustion chamber, nozzle, ignition device, each of which is divided into several sub-items. It is absolutely high-tech.

Fortunately, what Gao Zhendong was going to do only required flying a few thousand meters, so the difficulty was not too great.

As for why Gao Zhendong also knows a little about this, this brings us back to the old topic of "online confrontation makes people progress."

There was a book in Gao Zhendong's storage. The content of the book was about the design of solid rocket engines. He had spent four lottery opportunities to directly find this thing from the system.

It was not difficult to get this thing in the past life, because it was a publicly available university textbook. From this, we can see that it is obviously nonsense to say that we do not advocate martial arts. It is just that in modern times, the "martial arts" that we advocate has changed slightly.

Gao Zhendong has invested a lot of money to do this job. It has been more than three months since the system was upgraded. He spent four times to read "TCP/IP Detailed Explanation" and four times this time. The number of draws is not enough, so Gao Zhendong dares not to draw.

Fortunately, he still has 6 spare pinches in his hand. Given his current situation, instead of betting on Europe and Africa, it is better to just use all his strength to make a miracle happen.

Although this book is a university textbook, it is very important in this era. Every chapter in it has been verified by predecessors with countless efforts, time and practice. Although there are only a few sentences in the book, for people of this era, every word is as precious as a pearl and weighs a thousand pounds.

For example, "Figure xx'Ares' first stage engine".
Well, what Gao Zhendong is doing now is not that grand, he just wants to make a small anti-tank missile engine.

Coincidentally, there is a picture in the book, "Figure xx Citigroup TOW anti-tank missile engine".

Although he didn't copy it exactly, with this picture and the various theories in the book, for Gao Zhendong, an anti-tank missile engine would not be a problem.

The advantage of this car is that it also has a mid-mounted engine, an oblique (oblique, jetting out to both sides from the middle of the projectile) nozzle, and a tail wire pay-off device.

It coincides with Gao Zhendong's idea, so its structure has good reference value.

As for why the domestic textbooks do not have a rocket engine structure of the Chijian-73 with a similar architecture, those who know about it will understand.

The entire rocket engine design process is relatively complicated, but Gao Zhendong's situation was special, so he quickly selected a configuration that was similar to the TOW engine, but also different.

After all, one is a heavy bullet and the other is a light individual bullet.

One is a vehicle-mounted launch, and the other requires soft launch in a closed space.

One is a tube launch and the other is a pure light rod.

As for the propellant, he chose the X12 double-base propellant of the American Dragon anti-tank missile without hesitation. Although the Dragon missile had an extremely weak speed of more than 120 meters per second and a range of 1000 meters, this had nothing to do with the propellant. It was purely the fault of the very cheap engine.

No, not "that", but "that pile". Have you ever seen a missile with 60 engines, igniting one by one in relay? This is it. And this is a single-soldier anti-tank missile. On a small missile body, the number of engines is so large that it almost makes people have intensive phobia.

(End of this chapter)