Chapter 284 Director Gao is so considerate

As for why Dow's DD double-base propellant was not chosen, there was no other reason but that its loading form was somewhat different from Gao Zhendong's idea.

When choosing propellants, Gao Zhendong also saw a very interesting sentence: "Propellants containing XX are highly toxic after burning and are usually only considered for use in the final stage engines of long-range missiles."

After selecting the configuration, propellant, and shell material, it was easy for Gao Zhendong to produce and sell it by himself and arrange for 591 to be launched.

Carbon steel and alloy steel are commonly used materials for solid rocket casings. 591 has the mechanical properties of alloy steel, is resistant to high temperatures, and can be rolled and forged. It is perfectly suitable for processing rocket engine casings.

Self-produced alloy steel has good processing performance and one of its biggest advantages is that it is cheap.

Don’t underestimate the costs brought by processing. Take titanium, which Gao Zhendong often promoted as a "high-end" material in his previous life, as an example.

Titanium is abundant and easy to smelt, so why was it so expensive in the past? The main reason is that it is difficult to process.

For the throat liner and nozzle, which have the highest material requirements for solid hair, this is not a problem at all for Gao Zhendong, as tungsten copper is already ready.

Gao Zhendong chose the same solution for attitude control as the Russian AT-3, also known as the Chijian-73. In order to reduce the complexity of the engine and the need for missile roll control, a one-dimensional control surface + gas rudder solution was used.

As for what the gas rudder is made of? There is tungsten-molybdenum alloy.

In this scheme, the engine has only two oblique nozzles and they are in the same plane. Theoretically, the missile can only be turned in one direction. However, this scheme cleverly utilizes the roll of the missile body, and the gas rudder is rotated only when the missile body rolls to the appropriate angle.

Simply put, when the control surface is perpendicular to the ground, it controls the left and right of the missile; when the control surface is parallel to the ground, it controls the ups and downs of the missile.

Although the principle is simple, the effect is really good. One advantage of the simple principle is that it is cheap.

After deciding these things, Gao Zhendong still had a lot of things to do, including working pressure, expansion ratio, combustion chamber, thermal calculation, and charge structure.
Fortunately, the requirements for this engine are among the lowest among missiles, and even the fixed-engine design requirements for rocket launchers are more difficult than this.

Because there are two requirements that rocket launchers must meet: one is range, and the other is cheapness.

These two requirements are even contradictory. Under the same conditions, if the weapon can shoot farther, it is not cheap, and if it is cheap, it usually cannot shoot farther.

So the shells for good rocket launchers are not cheap. The joke that once circulated about "dozens of BMWs flying in the air" is not just a joke.

Of course, compared with the Pig Mother Ship, which costs 80 US dollars for a 155mm shell and whose performance does not meet expectations, it can be considered to be good value for money.

Gao Zhendong's work status naturally became half a day playing firecrackers and half a day working on single-board computers, but his progress was not affected much. After all, for him, changing his mind frequently can improve his efficiency.

When Gao Zhendong got home from get off work, he saw several people waiting at his door, guarding a wooden box. Lou Xiao'e invited them to come in and sit and wait, but was politely declined.

Seeing Gao Zhendong return home, a comrade who seemed to be the leader stepped forward and handed Gao Zhendong a notebook: "Hello, Director Gao, we have been ordered to deliver the equipment to you."

Gao Zhendong verified it and found no problem. Moreover, this comrade seemed familiar, but he could not remember when he had met him. Anyway, the certificate was genuine from the Defense Work Committee, but he did not know where the person was from.

He felt a little strange because he had not applied for any equipment, especially for his family, as he had none.

He has always been very careful in this regard, so as not to add burden to the public. As long as it is used at home, even if it is something needed for scientific research, he will buy it with his own money. If it is more expensive or the channels are more special, he will leave it to the Lou family to deal with.

"Comrade, are you mistaken? I haven't applied for any equipment recently." Gao Zhendong said with a smile as he invited them into the house.

The visitor also smiled and said, "You didn't apply for this. The committee asked the 12th Ministry of Machinery to arrange it. You are the main designer of this thing, so you must also participate in the trial test of the prototype."

After that, he opened the box for Gao Zhendong to check. He took a look and found that it was a printer.

The computing institute just gave him one of these things and placed it in the factory's computer room. However, it is not convenient for the computing institute to send one to his home.

It seems that the Defense Work Committee thought this thing was good and would facilitate Gao Zhendong's work, so they simply transferred another prototype from the computing center, which already had only a few. Then they gave a very fair reason: the designer personally participated in the trial test of the prototype.

Gao Zhendong knew that a closing meeting had been held today, but Gao Zhendong did not attend. It was not worth wasting time on such a small thing, as it could be handled by calculation.

The Computing Institute specifically mentioned this matter during the appraisal meeting: "Comrade Gao Zhendong, the main designer of the printer, was unable to attend the meeting due to temporary work commitments, and has entrusted us to apologize to the appraisal committee."

However, this did not affect the smooth passing of the printer's results appraisal. Just kidding, it would be a miracle if something that fills in the blanks fails.

There are many different opinions about the origin of the invention of the needle and the emergence of the first truly commercial machine, but there is no doubt that the one at the Institute of Calculation should be one of the earliest.

It is hard to say whether we are leading the world or not, but we can confidently say that we are at the world's advanced level and have filled domestic gaps.

Even the appraisal committee didn't know what to appraise, because this thing was new, so new that even the concept was new. So they simply took the research application report that the 12th Ministry of Machine Building and the Third Rolling Mill jointly submitted to the 12th Ministry of Machine Building, reviewed it once, and completed it.

Some experts also suggested that the relevant requirements for typewriters should be referred to, but a closer look revealed that the two things sound similar, look similar, but in fact the difference is as big as that between humans and chimpanzees, so the idea was dropped.

Gao Zhendong was very happy to have a printer at home. He was originally embarrassed to ask for it, but the Defense Work Committee did such a good job, so he was here anyway.

Several visitors helped Gao Zhendong place the printer in the south room, and then left without even drinking a sip of water.

The items delivered were quite complete, even several packs of 16K printing paper were prepared. While Lou Xiao'e was cooking, Gao Zhendong immediately turned on the computer and edited a copy of what Lou Xiao'e needed in the editing environment.

——A mathematics test paper.

Director Gao set the questions himself, just asking whether your level is advanced or not. It's just that there was not enough time, otherwise Gao Zhendong would have been able to figure out all the math, physics and chemistry.

Lou Xiao'e listened to the "buzzing" sound of the printer and walked over to take a look out of curiosity. She was delighted to see a clean and tidy test paper being spit out by the machine. This was all she needed. It was almost the end of April and the exam would be in a few months. She had reviewed a lot of knowledge, but lacked opportunities for practical simulations.

In fact, Gao Zhendong’s handwritten test paper is not unusable, but it is rare. It is really a novelty to do this kind of test paper.
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Although Gao Zhendong thinks that printers are small things and not worth mentioning, they have a different meaning in the eyes of some ministries and commissions.

For example, the Ministry of Foreign Trade has been cautious since it learned about the situation of Gao Zhendong, the "No. 1 export earner". It has paid attention to the relevant information from the Third Steel Rolling Mill of the Seventeenth Ministry of Machine Building in the notifications between ministries and commissions.

So when the printer passed the appraisal and had not yet been put on the public publicity channels, they had already noticed it.

The new machine tinkered with by the “No. 1 export earner” is worth a look.

When I saw it, I was tempted. It would be a waste of resources if I didn't export it.

It is a perfect match with DJS-59, to the extent that it makes people feel that even if it is not a one-to-one match with DJS-59, it should at least be a one-to-two match.

Moreover, it is purely for civilian use. Unlike sensitive devices such as 591 and DJS-59, this thing is not sensitive at all. I will sell it to anyone who wants it.

Comrade Gao Zhendong was so thoughtful. Seeing that the export of urea steel was about to be affected because of the domestic promotion of urea industrial production for self-use, he immediately came up with a new thing to fill the gap.

In the words of later generations, Director Gao's actions are called horizontal linkage of multiple departments, vertical exploration of customer pain points, development of new tracks, focus on new audiences, self-iteration of product matrix, support for customer needs, empower customer goals, develop new strategies, and promote the widespread implementation of new business scenarios, aligning incremental customers and following up on existing customers.
The Ministry of Foreign Trade of that era certainly couldn't come up with such nonsense, but their idea was very clear: I'm going to sell this thing!
So within two days, this thing appeared on the shelf product list of the Ministry of Foreign Trade.

If you pass by and take a look, you will find that the latest peripheral accessory DY-59 of DJS-60 is on sale. You will not suffer a loss if you buy it, and you will not be cheated. You don’t have to suffer a lot of pain to copy the screen. If you add some money, I will give you a set of matching editing environment.

Although the relationship had become very strained, it did not prevent everyone from doing business. Comrade Sergeyev, who was in charge of this matter in the north, soon received the request. This thing called DY-60 aroused the interest of a large number of units that used imported DJS-59 computers, and they strongly requested to import it. After all, copying results in front of a computer monitor was not a comfortable job.

Sergeyev pounded on his desk with his briefcase: "Idiots, a bunch of idiots, they are betraying the great motherland, they are defeated by hedonism at work!!!"

His deputy Petrovich looked firm: "Comrade Sergeyev, this is a work requirement. This is a requirement for building our great motherland more efficiently. You need to stay calm." Damn, I want to use the printer too.

(End of this chapter)