Eagle Sauce: The 055 destroyer was launched into the sea just after the founding of the country?

The full name of the small solid engine is small solid rocket engine.

Solid rocket engines are chemical rocket engines that use solid substances (energy and working fluid) as propellants.

The operating principle is that after the solid propellant is ignited, it burns in the combustion chamber to produce high-temperature and high-pressure combustion gas, which converts chemical energy into thermal energy.

The gas expands and accelerates through the nozzle, converting thermal energy into kinetic energy, and is discharged from the nozzle at an extremely high speed, thereby generating thrust to propel the missile forward.

The combustion products flow through the nozzle, where they expand and accelerate, and the thermal energy is converted into kinetic energy, so that they are discharged from the nozzle at a high speed to generate thrust.

A solid rocket motor consists of a propellant, a combustion chamber, a nozzle assembly and an ignition device.

The grain is a hollow cylinder made of propellant and a small amount of additives.

The ignition device is used to ignite the charge and usually consists of an electric ignition tube and black powder.

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

In addition to accelerating the expansion of combustion gases to generate thrust, the nozzle is often combined with a thrust vector control system to form a nozzle assembly in order to control the direction of thrust.

The system can change the angle of gas injection, thereby changing the direction of thrust.

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

Compared with liquid rocket engines, solid rocket engines have a shorter working time and a higher acceleration, which makes thrust difficult to control and repeated starting difficult, making them unfavorable for manned flight.

But on the other hand, this is also its advantage. It is extremely suitable as an engine for rockets, missiles and sounding rockets, as well as a booster engine for spacecraft launches and aircraft takeoffs.

The difficulty in manufacturing solid rocket engines lies in this.

在推进剂燃烧时，燃烧室须承受2500～3500度的高温和102～2x107bar的高压力。

Therefore, it must be made of high-strength alloy steel, titanium alloy or composite materials, and equipped with a thermal insulation lining between the propellant and the inner wall of the combustion chamber.

Fang Yu thought about it for a moment and immediately rejected the idea of ​​using titanium alloys and composite materials as the manufacturing materials for solid engines.

There is no other reason. Titanium metal is too scarce in Longguo. Even if it is available, it is extremely difficult to manufacture titanium alloy.

With the current industrial level of Longguo, it is impossible to manufacture it.

The manufacturing process of composite materials is even more difficult than that of titanium alloys.

Even in the United States in the previous life, large-scale production and application of it did not begin until the 20s and 8.90s.

As for the manufacturing process of high-strength alloy steel, it is relatively simple.

Even without me, Longguo would have imitated maraging steel, a high-strength alloy steel, in the early days of its founding.

If solid rocket engines are to be mass-produced, the output can be guaranteed.

After making the decision, Fang Yu no longer hesitated.

Start building the first solid rocket engine production line in Longguo directly...

……

Three days later.

"Fang Yu, I haven't seen you for a few days. What are you busy with?"

"If you don't hurry up and grab all the cabbage and pork dumplings the cafeteria made today, those little bastards will snatch them all up..."

Wang Changhai and Liu Zhenye came to the workshop where Fang Yu was.

As soon as I opened the door, I felt a gust of hot air rushing towards me.

Not far away, a small pillar of fire gushed out from a strangely shaped machine, emitting a dazzling light like the sun and violent airflow.

The two were blown by the air current, staggered and almost fell.

Fortunately, after a while, the flames slowly died out.

But it took a long time for the two people's vision to recover from the whiteness.

At this time, Fang Yu's figure wearing protective clothing and goggles emerged.

"Fang Yu, what the hell are you doing? Why is it so scary?"

Wang Changhai swallowed and asked with some fear.

Fortunately, Fang Yu placed this thing in the middle of the venue to conduct the experiment.

If it was placed at the gate, wouldn't Zhao Zecheng and I have been roasted into jerky by that pillar of fire?

At this time, Fang Yu took off his goggles and a smile appeared on his tired face.

Instead of answering Wang Changhai's question, he took out a stack of information and wrote while talking to himself.

"The thirteenth test of the rocket's solid engine was a success..."

Then he turned around and spoke as if he had just seen Wang Changhai and the other two.

"Director Wang? Deputy Director Zhao? When did you two arrive?"

Wang Changhai was about to answer, but Fang Yu waved his hand.

"Forget it, it's not important."

"My machine experiment was successful. Could you please call Su Niannian and the other technicians over for me?"

"I have something urgent to tell them."

"You...Okay, you wait."

Wang Changhai hesitated to speak, nodded helplessly, and dragged Zhao Zecheng out of the workshop.

He walked with a wry smile.

"This little bastard actually ordered me around? If someone saw this, they'd think he was the director of a military factory!"

"There's nothing I can do. He's a genius after all. Even Commander Song has to rely on him. What's the point of him commanding you and me?"

"I believe Fang Yu will soon be very successful!"

On the side, Zhao Zecheng also said with a wry smile, and then nudged Wang Changhai with his arm.

"Old Wang, are you jealous?"

"Me? Jealous of him? Come on."

Wang Changhai first rolled his eyes at Zhao Zecheng, then spoke seriously.

"I wish there were more people like Fang Yu in our Dragon Country, so that our Dragon Country can become prosperous and strong sooner."

"If you fall behind, you'll be beaten. I'm really scared of the hard times before the founding of the People's Republic of China..."

……

"Infrared sensor manufacturing completed."

"The optical sighting system has been manufactured."

"The individual rocket launcher has been completed."

"The small rocket shell has been manufactured..."

After Wang Changhai called Su Niannian and others over, Fang Yu asked this group of people to report on their respective work progress.

As the top technical talents in Longguo, this group of people did not disappoint Fang Yu.

With the materials provided by Fang Yu, everyone completed their projects as promised.

"Very good, the small rocket solid engine I have just tested has been successful."

"Next, we can assemble these parts and start making infrared-guided weapons!"

Upon hearing this, Su Niannian and her group were eager to give it a try.

I have worked hard for more than ten days, and it is finally time to see the results!

Immediately afterwards, a group of people began the busy integration project under Fang Yu's guidance.

Three hours later...

"Success? Finally succeeded!"

"Senior Fang, we've finally created Dragon Nation's first infrared-guided weapon!"

"Woo woo woo, this is really not easy!"

"I have a feeling this infrared-guided weapon will definitely be a legendary weapon that will be written into the history of world weapons..."

Su Niannian and her group were all excited when they looked at the freshly produced infrared-guided weapons. Some even had red eyes and almost cried.

Even Fang Yu, who had been silent all this time, showed a relieved smile on his face.

It worked. I finally completed this infrared-guided weapon within the deadline of fifteen days.

With this weapon, the harassment of the United States Air Force can be curbed to a great extent, and naturally the casualties of many Dragon Army soldiers can be reduced.

As long as I can do this, it is worth it no matter how hard or tired I am...

But at this moment, Wang Changhai suddenly looked panicked and walked in hurriedly.

A group of people noticed something was wrong and immediately stopped celebrating.

"Fang Yu, follow me quickly! Commander Song is here!"

"Hmm? Commander Song has arrived after only thirteen days? But it doesn't matter. This infrared-guided weapon has already been manufactured."

"It's a good opportunity for him to experiment with it."

Fang Yu said slowly.

"It would be better if only Commander Song came. With him is Director Li from the 301st Institute."

"He doesn't look very happy, and he specifically asked you to come see him!"