The ups and downs of life in the Siheyuan

The engine ignited smoothly and started idling.

In fact, the car was tested here yesterday, otherwise we wouldn’t have invited several leaders.

Today is more like a kick-off meeting.

The original plan was to invite leaders to report after all indicator tests were completed.

But when the old general heard that the improvements had been completed, he couldn't wait to organize the kick-off meeting.

For safety, everyone retreated to the distant bunker and just watched through the observation hole.

Li Yuan also squatted down and stared at the engine from the observation window.

"Except for the normal wind pressure and combustion explosions, there is very little noise," a test pilot shouted to a colleague next to him.

"It's not just the noise. If you look at the test bench, you can hardly feel the unnecessary vibrations," another test pilot also lamented.

"How did he do it! I really want to try flying a J-6 equipped with this kind of engine!"

"Same feeling!"

"The idle speed is very stable, let's look at the acceleration performance," Engineer Lei became a little interested.

"The control part has been changed too much. I hope it won't get out of control," said Engineer Liu.

"I heard that there are many changes, which are a bit reckless," Engineer Lei agreed.

. . . . . .

Li Yuan controlled the speed button and started to speed up.

The roar of the engine gradually became louder, and those who had not put on earplugs in advance put on earplugs.

After half an hour, the engine was running smoothly.

Li Yuan stopped the car decisively and walked towards the crowd.

"Yes, the preliminary test performance is stable, and the stress test will be carried out next. Xiao Li, are you confident?" The old general patted Li Yuan on the shoulder.

“I mainly modified the control system and fuel injectors, and other parts were only partially improved.

The biggest concern now is the combustion chamber, I’m worried about its ability to dissipate heat.”

"I remember that you replaced the accessories of the combustion chamber."

"Yes, all the parts have been replaced with new ones, but I'm worried about the heat sink.

Under high temperature and high vibration conditions, those heat sinks are prone to breakage."

After hearing Li Yuan's words, the old general turned his attention to a group of people at the aircraft factory.

Lei Gong and Liu Gong were confused, but in fact it was true. They looked at each other and nodded to the old general.

The old general looked at Li Yuan with a serious expression, "Are there any ideas for improvement?"

"Not yet."

The two engineers breathed a sigh of relief.

“Okay, I hope you work hard.

Xiao Li, can you tell us where you have improved? "

"General, would you like to come to the conference room?" a base leader suggested.

"No, it's nice here. The air is good and the people are energetic."

The base leader backed away with a smile, and Li Yuan took over the conversation wisely.

“There are four points of improvement:

The first change is the biggest, from the previous mechanical traction control to electrical + hydraulic control.

Secondly, the fuel injector and fuel supply pipeline were modified and a new technology was adopted, which I call high-pressure common rail technology.

The third point is to modify the design of the shaft heat insulation protection cavity.

Fourth, try to improve the engine surge phenomenon."

At this point, both the technical staff and the leaders and test pilots were all a little confused.

The first change has been seen by everyone just now and can be understood.

The second part, I can understand the literal meaning, but I don’t know what it means. It sounds so high-end.

The third point is best understood, especially by the technicians of the two factories, but they are full of curiosity about how to improve it.

In the fourth place, they find it even more incredible that a layman dares to talk about "surge" as a solution to the current world problems.

The two test pilots who had the strongest reaction were those who hated the word "surge".

Many aerial parking accidents are mostly caused by it.

Their eyes were shining. Judging from the performance of the engine just now, they were full of expectations.

Without waiting for anyone to ask questions, Li Yuan immediately began to explain in detail one by one.

The explanation lasted less than 15 minutes, but the questions lasted more than 4 hours.

Eventually, the answering venue had to be moved to the conference room.

Li Yuan kept sketching on the blackboard, with schematic diagrams and principle explanations.

The most shocking ones are those formulas in materials science, mechanics, thermal science and other disciplines.

As long as you explain what you need, it will be at your fingertips.

This alone conquered everyone present.

After 4 hours of explanation, everyone basically understood Li Yuan’s improvement ideas and were impressed by his profound knowledge.

The veteran general and several leaders participated in the whole process.

The direct leaders of Laboratory 621 are simply overjoyed.

Those foreign students and engineers from two large factories have gone from being unruly to being submissive now.

At least, in the eyes of this superior leader, they are like this.

His subordinates showed their faces in front of all the leaders, which was to make him look good.

When other leaders and old generals around him praised Li Yuan in low voices, he pretended to be polite.

"It's just a coincidence, hehe..."

"You are still very young and you still have a lot to learn...".

. . . . . .

When an important leader of the Three Machinery Department smiled and said: "Li Yuan is very familiar with aviation, it is best to transfer him to our research institute!"

Li Yuan's superior leader was about to be polite, but immediately reacted, "Don't even think about it!".

His face immediately turned red.

Several people around him burst into laughter.

The leader of the Three Machinery Department said: "It's really amazing. The flight control technology that is still being demonstrated abroad is today actually seen by me."

The old general nodded, "Although I don't understand the flight control system, I can see how advanced it is.

This is much more reliable than the nooses and pulleys of the past.

The space occupied is also much smaller, making it easier to improve the aircraft structure.

Those indicator lights and scales make the working status of the engine clear at a glance.

Especially the closed-loop system, which definitely reduces the pilot's burden.

It can greatly shorten the time to train a qualified pilot."

Several leaders were sitting in the back row discussing, and those in front were already discussing in full swing.

Seeing that everyone was almost discussing, the old general looked at his watch and saw that it was already dinner time.

"Okay, let's take a rest and eat first. There will be more time in the future.

The body is the capital of revolution, you must eat on time."

The old general's intervention stopped the discussion.

Dinner is pork stewed with vermicelli. Although there are a little more potatoes and cabbage, everyone can still get three or five large pieces of fat.

The staple food includes rice and steamed buns, it all depends on personal preference.

This kind of meal is a feast that everyone has rarely seen in recent years.

Therefore, after the meal started, everyone stopped the discussion with a tacit understanding and bowed their heads to eat.

Because we had to test the car all night, no one drank.

After the meal, the old general looked at the technicians.

"Xiao Li, as well as you engineers, you must unite sincerely, exchange ideas, and do your best to improve the various performance indicators of the engine.

Every point of improvement is not only a reduction in cost, but also an improvement in combat effectiveness.

Compared with the West, the gap between Turbojet-6's first turnover is 3 to 5 times.

So you have a long way to go."

There were more than a dozen technical people, some stood at attention and pledged, and some nodded frequently.

Li Yuan chose to stand at attention.

"Yes, General!"

"Yes, General!"

"Okay, General!"

. . . . . .