1959: Carrying the achievement system, she rolled

Secretary Wan only stayed in Beijing for a few days before going back. He came to Beijing just to see his son.

But in Wan Ping's mind, his biological father is important, but not as important as his bazooka.

Secretary Wan could only go back and work hard on his career with great reluctance and various worries.

He didn't say anything to ask Du Yimeng and Yu Lang to take care of Wan Ping, because he knew that the young couple would do so even if he didn't say it.

Just like the relationship between him and Yu Hongru, he would do his best as long as the other party needed him without the other party asking.

Accompanying him were Bao Shiqing and his wife.

They just came to see Wan Ping, and seeing that he was doing well here, they felt relieved.

Secretary Wan did not directly use money to thank Bao Shiqing because he felt that this was an insult to Bao Shiqing and that some favors could not be repaid with money.

The most important thing was that he was worried that Bao Shiqing would misunderstand that he wanted to use money to sever this favor.

However, he gave the money to Wan Ping. Based on his understanding of Wan Ping, Wan Ping would definitely give part of the money to the couple.

And as he expected, Wan Ping did exactly that.

In this way, he could make amends to Bao Shiqing and his wife without making a fuss.

As for the rest, we’ll have to take our time!

He didn't understand the part that Wan Ping left behind at first, but later he learned that Wan Ping had been preparing to get married.

I have to say, I am better than him in this respect. He was cleaner in his pockets than in his face.

……

Time passed in a hurry. In the blink of an eye, more than two months had passed, and the deadline given by the superiors was getting closer and closer.

Director Song was extremely anxious. He would come to the laboratory for a few rounds almost every day, but he didn't dare to go in for fear of disturbing Du Yimeng's work.

The structure of the new rocket launcher has already been preliminarily designed, and now the only thing missing is the solid fuel engine that Du Yimeng is responsible for.

Today, Director Song walked around the laboratory door again. As soon as he reached the door of the director's office, he met Political Commissar Yang who was about to go out.

The moment Political Commissar Yang and Director Song's eyes met, he quickly stepped back and was about to close the door, but he was still a step too late.

Director Song was more skilled and kicked the door.

"Old Song, stop it..." Political Commissar Yang was helpless. He was busy all day long, and still had to listen to Old Song's nagging. Did the other party ever consider the feelings of his ears?

"Old Yang! I'm feeling anxious and just want to find someone to talk to, which can help relieve my tension, right?" Director Song pushed the door open with a smile.

He sat down at his desk and poured himself a glass of water.

In order to catch Lao Yang as a chat partner, he even left his teacup in Lao Yang's office.

He took a sip of boiling water slowly and couldn't help but sigh in his heart that he was really smart.

The only pity is that Lao Yang is too frugal and doesn't even have a piece of broken tea leaves.

"Can't you find someone else?" Political Commissar Yang said coldly.

"Everyone else is busy and has no time," said Director Song.

Political Commissar Yang: He is also very busy, okay!

"Director Song, Comrade Du and Comrade Wan have gone to the test firing range..." a serviceman shouted from a distance.

"Test firing range, is it done?" Political Commissar Yang, who was speaking, had already run towards the test firing range.

Director Song, holding a glass of water in his hand, followed behind subconsciously.

It was not until the boiling water in the teacup scalded his hand that he remembered he had a cup of boiled water in his hand!

He stuffed the teacup into the orderly's hand and quickly caught up.

The orderly was caught off guard and a scalding hot cup of tea was stuffed into his mouth. He almost threw it away as soon as he touched it.

Fortunately, he still remembered that this was Director Song's teacup, but it was really hot...

……

Time goes back to half an hour ago, when Du Yimeng installed the solid fuel engine on the front end of the rocket launcher.

The system's voice rang in her mind, and then she clearly felt that her brain, which had been almost rusted due to being busy during this period, had become clear.

"Congratulations to the host for creating the most cost-effective recoilless rifle. Reward: 1000 attribute points and the blueprint for the RPG-29 rocket launcher."

Research skills: Primary (100/100), Intermediate (1000/1000), Advanced (1954/), King (0/), God (0/)

Hearing the system's announcement, Du Yimeng smiled. As expected, this wave of wool-pulling was a huge profit.

She had thought that if she only developed a solid fuel engine and did not participate in the design of the rocket launcher, the system would only give her half the reward.

For this, she participated in the design of the rocket launcher. Now she is the one who is rewarded, but it is Qin Chulong and Wan Ping who did the work.

It’s so exciting!

"Comrade Du, is it installed?" Wan Ping asked impatiently.

The engine is the core component of the rocket launcher. Without this engine, the rocket launcher they made would be useless even as a fire stick.

"It's installed!" Du Yimeng took a step back and made room.

It was also presented to them, and a new type of recoilless rifle came into being.

The new type of recoilless rifle is usually called a rocket launcher because of its launch tube.

The rocket launcher consists of several structures such as the launch tube, sight, handle, guard, shoulder strap, grip, launching mechanism, firing mechanism and safety device.

The launch tube is a steel round tube with a diameter of 40 mm and a length of 95.3 cm. In order to ensure multiple uses, the round tube is made of alloy steel.

The sight adopts a columnar front sight structure, coupled with a foldable notch-type rear sight. Not only that, the rear sight can also adjust the aiming distance through a slider.

The working principle of this new type of rocket launcher mainly depends on its internal rocket engine and stabilization device.

The rocket engine is exactly what Du Yimeng has been studying during this period.

She started her research on solid fuel engines, and it turned out that she was on the right track.

Don’t think it’s just a simple guess, it can help researchers avoid many detours.

This means saving more time, which is what they lack now.

The solid fuel engine is composed of components such as the propellant, combustion chamber, nozzle assembly and ignition device.

The charge is a hollow cylinder made of fuel and a small amount of additives. The reason for this shape is that the hollow part is the combustion surface.

The propellant is then placed in the combustion chamber, which is the casing of the engine.

在燃料燃烧时，燃烧室须承受2500～3500度的高温和102～2x107bar的高压力。

Therefore, the material that needs to be used for the engine casing is high-strength alloy steel.

An insulating lining is also required between the propellant and the inner wall of the combustion chamber.

The ignition device is used to ignite the powder column and is composed of an electric ignition tube and a powder box.

When power is turned on, the black powder is ignited by the heating wire, and then the black powder ignites the powder column.

After the grain combustion is completed, the engine stops working.