In Nanjianzi Hutong, next door to the Zhou family, Zhou Jimin led Wu Weihai to renovate the house and put forward his own ideas.

Since the house was successfully purchased in his name, Zhou Jimin postponed his trip to Northeastern Harbin Institute of Technology.

The neighbor next door moved out of the house soon, so he stayed and handed over the decoration work of the house before going to the Northeast.

"By the way, during the renovation, keep your voice down if you can, and don't make any big noise."

Thinking of the pregnant woman and children at home, Zhou Jimin warned.

In fact, he could wait until Ding Qiunan gave birth to the baby and then find someone to decorate it. However, at that time, the baby was born and he couldn't stand the noise of the decoration.

Therefore, it is better to arrange the decoration in advance, and there will not be so much trouble later.

"Don't worry, there won't be any noise."

Wu Weihai is also an old acquaintance and knows Zhou Jimin's temperament. In addition, the transformation this time is not very big and there is plenty of time, so he naturally takes over everything.

Zhou Jimin nodded, then returned home and said goodbye to Ding Qiunan and the others.

Several children are reluctant to leave, especially Ding Qiunan. She is only more than a month away from her due date, and he still has to go out.

"You should be obedient at home and don't make your mother angry. Do you understand?"

"Got it."

The children responded. Zhou Jimin looked at Little Goldfish and his three siblings again, waved, got in the car and left.

After four years, he once again boarded the train to the Northeast.

However, unlike before, this time he took the initiative to request to go to the Northeast.

Since the trip was not very urgent, he took the train to Northeast China.

Maybe, maybe, maybe Lao Lin thinks that plane tickets are not so easy to arrange.

In fact, since the founding of the People's Republic of China, the civil aviation industry in the mainland has been developing with difficulty.

Before 1963, the aircraft in the Mainland were basically the Yin Er 14 or 18 models produced by Northern Lao Maozi.

The passenger capacity of this kind of aircraft is 18 to 24 people, because it is a piston twin-propeller design, with a speed of 412 kilometers per hour and a maximum range of 1,885 kilometers.

It was not until 1963 that the Viscount aircraft ordered from Great Britain entered the mainland, and the development of civil aviation in the mainland ushered in a new momentum of development.

In fact, this is the current development situation of civil aviation in the mainland.

So far, the number of civil, special, cargo and other aircraft in the Mainland has barely exceeded 100.

Most of the aircraft are purchased from abroad, and some are imitation or self-developed aircraft.

If you were full before getting in the car, you should poop now.

There are no diapers in this era, only crotchless pants.

"Yes, the child has just eaten."

The woman was obviously not happy to talk to Zhou Jimin, so she reluctantly said something perfunctory, then turned her head, looked down at the child and remained silent.

But at this time, Zhou Jimin suddenly stood up and went straight to the police.

Soon, two police officers followed him back to the car, asking to see the woman's identity information and asking about the child.

As a result, women suddenly became less calm.

This woman has a mental problem. Whether the child is her own is debatable, but there is no doubt that she abused the child.

Because women actually feed their children sleeping pills, which is simply unforgivable.

Therefore, the women were taken off the train after the next stop.

First, she did not bring her identity certificate, which could not prove that the child was her biological child.

This chapter is not over yet, please click on the next page to continue reading!

The second is to use medicine on a baby who is five or six months old. You must know that babies under six months old are generally not allowed to take medicine because they are too young and their body resistance may not be able to resist the invasion of the medicine.
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Therefore, the carriage quickly became quiet.

After the woman was sent away, Zhou Jimin stared out the car window for a while, then continued to draw.

People in the car came and went, up and down, but Zhou Jimin never paid too much attention.

He is going to the terminal, so any stop along the way has nothing to do with him.

Finally, after two days and one night, he finally arrived in Northeast China.

I don’t know how many cities the train has detoured, but why did it take so long?

When he came out of the train station, he saw someone holding a sign to pick him up. He scanned it around and found his name.

"Hello Comrade Zhou Jimin, you are so young, I didn't even dare to recognize you just now..."

We just met, and the other party said casually.

Through conversation, Zhou Jimin learned that the other party's name was Lin Yue, an associate professor at Harbin Institute of Technology.

He is a genius in many disciplines such as aerodynamics, fluid mechanics and applied mathematics. He is responsible for the overall design plan of the drawings on the aero-engine project.

So, the two of them started chatting just as they were getting into the car.

The main reason is that they are all very technical, it is rare to have the opportunity to communicate, and they are also mainland scholars, which is really rare.

Over in the capital, Lin Yue knew almost all the researchers related to aerospace engines.

After all, their cooperation with the capital is quite close, and they often exchange letters.

"Professor Lin, I don't quite agree with the concept of the turboprop engine you mentioned. I know that this turboprop is more popular in the world now, but in fact..."

As we all know, a turboprop engine relies on the rotation of a turbine to rotate the propeller.

Within the normal speed range, the propulsion efficiency of the turboprop engine remains higher than or equal to a constant, and is concentrated in medium and high-pressure sonic flight. The benefits decrease with the increase of airspeed.

The fuel consumption rate of turboprop engines is lower than that of turbofans and turbojet engines of the same size.

A low fuel consumption rate is enough to make many people crazy.

But don't ignore one problem, that is, the turboprop engine has good low-speed performance, but not high-speed performance.

This means that the voyage is short and cannot carry out long-distance voyages.

Most of today's aircraft are almost all turboprop engines. One characteristic of them is that they can only carry out short-range flights of less than 3,000 kilometers.

Whether it is Yin Er Fourteen or Eighteen, or the Viscount of Great Britain, they are all turboprop engines, and their maximum range is less than 3,000 kilometers.

It is different if it is replaced by a turbofan engine, which can easily carry out ultra-long-distance voyages of tens of thousands of kilometers.

In fact, this is also one of the research directions for missile aircraft, space shuttle aircraft, etc.

"Comrade Zhou, why don't we know this?"

Lin Yue said with a bitter smile on his face.

The advantages of turbofan engines are large thrust, high propulsion efficiency, low noise, low fuel consumption, and long aircraft range.

But the shortcomings are equally disappointing, that is, the fan diameter is large and the windward area is large, so the resistance is large, the engine structure is complex, and the design is difficult.

Yes, the structure is complex and the design is difficult.

These two shortcomings alone are enough to deter people.

The mainland's industrial foundation is extremely poor. It is already very good to successfully imitate foreign turboprop aircraft, let alone develop its own turboprop engines.

Although this kind of self-research is actually imitation to a certain extent, it is not 100% self-research and development.

But it is also a huge progress and leap.

However, turbofan engines, a high-tech technology that is also emerging abroad, have not yet been mastered. How can the mainland surpass foreign countries and achieve self-research?

"Professor Lin, theoretically speaking, this kind of engine has been around since World War II, but it just hasn't been put into practice..."

Zhou Jimin naturally knows that turbofan engines are the future trend, and foreign countries have also begun to exert their efforts.

Mainland China started late, but starting late doesn’t mean it will always lag behind others.

It’s time to catch up. As long as we take this step, there will be one less technology that will be blocked by foreign countries in the future.

Soon, the two drove to Harbin Institute of Technology.

Since they are all scientific researchers, they don't pay attention to formalism. They go directly to the guest house, check in, put down their luggage, and go straight to the laboratory.

In the laboratory, Zhou Jimin met several old professors, all of whom were pioneers in aircraft engines.

After the exchange, Zhou Jimin couldn't help but be filled with emotion.

If it weren't for the rising wind, these mainland scientists would definitely be able to turn the tide.

After the reopening, due to the wind, many people were still bound by their hands and feet, let alone scientific researchers.

Therefore, it is not without reason that the mainland lags behind and is choked by foreign countries.

If you think about it carefully, in later generations, even though the mainland was completely backward, it still succeeded in finding a way to make things in the mainland.

Don't talk about the low-end manufacturing technology in the mainland, the inability to make money, etc. It is undeniable that this kind of manufacturing strength is the way that is most in line with the national conditions at the time, and it also provides the direction for future upstream development.
To be continued...