Courtyard light

Chapter 319 Good News (Second Update)

"How big is your tunnel boring machine? It actually requires a crane to assemble it?" Sun Aiguo asked curiously.

"With a diameter of ten meters, the length of the machine head alone is about six meters, and the overall weight is less than 300 tons!" Liu Hai replied.

puff!
Sun Aiguo squirted out the water and asked in disbelief: "How much?"

Liu Hai repeated it again, and then explained: "The equipment is too small to facilitate assembly and maintenance. Our country does not have super large one-piece forging equipment, so the machine head must be divided into many parts for assembly."

"If the design is small, the structural strength is not good. If the design is larger, people can easily maintain and assemble it inside the machine head."

No matter how Liu Hai explained it, Sun Aiguo looked at his office and saw that it was only three meters tall. In other words, the tunnel boring machine designed by Liu Hai was three stories high.

"Doesn't this mean we need to find a separate place for testing?" Sun Aiguo thought about how big this thing was, and realized that there was no place to test it in the factory.

"Look for a stone mountain. This one is designed to dig into stones, but the one designed to dig into soil is different." Liu Hai nodded.

"Tell me your specific requirements, and I'll find a place for you first. Let's test it ourselves first, and report back if we succeed." Sun Aiguo was a little worried this time, after all, he is such a big guy.

Liu Hai nodded and stated his request.

The assembly of the shield machine is also very troublesome. The tunneling surface must be reinforced with cement and so on.

"It's not urgent. We still have at least two months." Liu Hai calculated that the progress of the shield machine still needs at least two months. In terms of assembly, debugging and testing, Liu Hai thinks that a month will be about the same.

Sun Aiguo nodded, and then asked: "How many meters can this be dug in one day at the fastest?"

"It's only a few meters, five or six meters is the most."

"Oh!" Sun Aiguo didn't know much about tunneling, but he felt that five or six meters was a bit short, and it was difficult to explain clearly. He decided to wait and report to the leader after the equipment was successful.

Liu Hai quickly got the current situation of domestic cranes and found that it was not a hydraulic crane, but a steel frame with a pulley on it, which was Jiefang brand.

Modern cranes are all hydraulic cranes, that is, there is a hydraulic column inside the crane's big arm, just like a fishing rod, but it uses hydraulic pressure as the driving force.

"It looks like we need to design a crane." Liu Hai also knows why hydraulic cranes are more difficult.

The main thing is the material, because the crane's material requires relatively high toughness and elasticity.

In modern times, we can see that when some crane arms are stretched out to work, they will pull out an arc. This is the toughness and elasticity of the material.

So Liu Hai pretended to be testing materials in the laboratory.

The production bangs of the shield machine are all thrown to the equipment department and maintenance department.

However, the Maintenance Department has recently been working on a 12-cylinder diesel engine, so the production tasks of the shield machine have been postponed.

"Xiao Liu, Mr. Huo wants 6000 small planes, 2000 land models, 2000 snow models, and 2000 water models. The price to the dealer is three times the cost we quoted." Liu Hai was in the maintenance department. During the experiment inside, Sun Aiguo trotted over.

Sun Aiguo just heard the news from the ministry, and he almost jumped up with excitement and exported the plane!
Listen to what these four words mean?
Is this an airplane?Even though it is small, even though its structure is simple, even though its cost is low, it is an airplane!

"Ah!" Liu Hai was also a little surprised. He didn't expect that this group of dealers also wanted airplanes.

And Liu Hai thinks this is a good start. Now that we can export small aircraft, will we be able to jointly produce large transport aircraft in the future?
The worst that can happen is to give these capitalists some shares. From now on, they can do away with large transport aircraft or large passenger aircraft in all foreign markets, even if they lose money to those dealers.

As long as they firmly grasp the domestic market, the two major aircraft manufacturing companies in later generations will sell thousands of aircraft to the mainland. It can be said that without the mainland market, the two aircraft companies would not have grown to that level.

But what do these two companies think of us?
Nowadays, there are many companies in the world that can build passenger aircraft, but it is not interesting to enter the passenger aircraft market now. On the one hand, the domestic environment cannot support many passenger aircraft.

At least we have to wait until the 80s. At that time, the foreign large passenger aircraft market was fiercely competitive, and they were plotting against each other. I just happened to add fuel to the fire, and to see who failed, I joined forces with the other party.

Now that there are more dealers, we will have greater confidence.

"I'll change it right away." Liu Hai also attaches great importance to the aircraft market, and now he wants to build a reputation first.

This kind of small aircraft looks harmless now, but it can be gradually upgraded. Third world countries still have many piston transport aircraft in the 21st century.

And many of them are transport aircraft from World War II operating there.

"Thank you for your hard work!" Sun Aiguo was also very happy when he heard Liu Hai's reaction. After all, it was related to the exit of the plane.

Liu Hai smiled, in fact, the seaplane can simply add two floats.

That is to say, the aircraft does not change its own design, but this has a disadvantage: the performance of resisting wind and waves is reduced.

This is because the only way to extend the landing gear is to extend it directly, because the height of the aircraft will be too high and the ability to withstand wind and waves will be reduced.By slightly changing the aircraft's body structure, the level of wind and wave resistance can be increased.

Liu Hai has been going back to the courtyard recently, because he has to go into the aircraft carrier space at night and use the supercomputer to do some designs, so it is safer to go back to the courtyard.

The basement was converted into two rooms by Liu Hai, one is used to store various items, and the other is a workshop.

Because the lights in the workspace need to be larger and brighter, fortunately, the electric meters in the yard are now separated, and there are ventilation ducts in the basement that lead directly to the top.

Every time you enter the aircraft carrier space, the bangs are on the basement side, and the door above is locked. There is also a locked door on the basement side, which can reduce the exposed target.

"Xiao Hai, there are still a lot of your dishes in the vegetable cellar. I forgot to mention it when I got off work in the afternoon!" Liu Hai had just finished eating when the second uncle came over and said.

"Uncle Fuji, how about you help me deal with it?" Liu Hai can't finish the food every year, because he basically doesn't eat at home. He only eats at home, and also eats some noodles and pimple soup.

"That's okay." Although the second uncle can handle the vegetables with bangs by himself, he still has to say hello.

The cabbages and radishes stored in winter must be stored every year. Liu Hai can't eat them all every year, so they are all left to the second uncle to deal with.

After using it for one night, Liu Hai came up with the seaplane design. It didn’t need to be designed separately.

But if you do it, you have to do it the best, so that you can form your own reputation.

After the bangs were designed, they were not immediately taken out because the other two versions and 4000 aircraft were enough for the aircraft workshop to produce for a while.

And there is no rush, because the dealers over there are busy applying for patents.

This group of dealers are more nervous about patents than Liu Hai. After applying for the patent, they signed an exclusive distribution right with Mr. Huo, and this group of dealers took over all the markets except the Big Brother camp.

Because Liu Hai is going to assemble a 12-cylinder diesel engine. This kind of diesel engine is designed for tanks.

No one has any doubt that Liu Hai can design and manufacture a 12-cylinder diesel engine, because Liu Hai has already come up with enough engine designs.

Gasoline, diesel, sea, land and air, everyone also understands that Zhu Haiyang would not be able to design it if it were not for the help of bangs.

The leader did not find anything wrong with Liu Hai's behavior. Instead, he felt that Liu Hai was a good student who respected his teachers.

Due to limitations in materials and technology, the size of the 12-cylinder diesel engine is not small, but Liu Hai can guarantee that this 12-cylinder diesel engine is much smaller than the diesel engines currently used in tanks.

When Liu Hai thoroughly understands the diesel engine technology for trailers on aircraft carriers, he will be able to produce a more compact and smaller diesel engine.

Zhu Haiyang led his team and the team from Liu Hai Maintenance Department to officially start assembling the 12-cylinder diesel engine.

Everyone is familiar with the drawings, and Sun Aiguo and others are also watching. This diesel engine technology can be said to be more advanced than Big Brother.

You must know that Big Brother's T62 medium tank only has 580 horsepower. According to the design, this diesel engine has almost 200 more horsepower.

The Type 59 tank has less than 500 horsepower, just a little bit less.

Looking at the engine in front of them, the leaders in the molding factory were nervous and uneasy. The leaders above had always paid close attention to this project, but they didn't show it.

The assembly started in the morning and was completed after three o'clock in the afternoon. Liu Hai also conducted some inspection and debugging.

Finally, the engine was hoisted on the test bench. There are oil supply facilities and other facilities on the test bench, mainly to test the performance of the engine, and there are also various safety measures to prevent accidents.

After getting ready, Liu Hai started the engine. Along with the sound of the motor, the 12-cylinder diesel engine sprayed out a stream of black smoke and ignited smoothly for the first time.

After ignition is completed, run it for half a minute, then perform a series of checks again, and finally drain the engine oil to see if there are any problems inside.

This complex structure of the engine is no smaller than the previous one.

The main reason is that the cost is too high. If other small engines have accidents, they will be scrapped at worst.

Such a large engine needs to be tested step by step.

"Succeeded?" Sun Aiguo asked impatiently after the five-minute test drive was completed?

"Initially it is considered a success, but more testing is needed."

"Great!" When Sun Aiguo and others heard this, the stone in their hearts finally fell to the ground. Even if there are problems later, they can just continue to optimize and improve. Whether there is or not is a key point.

Sun Aiguo and the deputy director in charge of military industry hurriedly reported to the leaders, because the leaders were also waiting for the good news.

(End of this chapter)