"How big is your tunnel boring machine?" Actually want to assemble a crane? Sun Aiguo asked curiously.

"The diameter of ten meters, the length of the simple nose is about six meters, and the overall weight is less than 300 tons!" Bangs replied.

Burst!

Sun Aiguo squirted out a mouthful of water and asked incredulously, "How much?" ”

Liu Hai repeated it again, and then explained: "The equipment is too small, it is inconvenient to assemble and maintain, our country does not have a super-large integrated forging equipment, and the machine head will be divided into many parts of assembly." ”

"The design is smaller, the structural strength is not good, and the larger design can be easily maintained and assembled in the head."

No matter how Liu Hai explained, Sun Aiguo looked at his office, and it was only three meters three, which means that the tunnel boring machine designed by Liu Hai is three stories high.

"Isn't this a separate place to test?" Sun Aiguo thought about how big this thing was, and knew that there was no place to test it in the factory.

"Find a stone mountain, this is a design to excavate stones, and the excavation of soil is different." Bangs nodded.

"You tell me the specific requirements, I'll find you a place first, let's test it ourselves first, and then report if it's successful." Sun Aiguo was a little worried this time, after all, he was such a big guy.

Bangs nodded, and said what he asked.

The assembly of the shield machine is also very troublesome, and the excavation face must be reinforced with cement and so on.

"There's no hurry, there's at least two months left." Liu Hai calculated, the progress of the shield machine is at least two months away, and if it is assembling and debugging the test, Liu Hai feels that one month is about the same.

Sun Aiguo nodded, and then asked, "How many meters can you dig this day at the fastest?" ”

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

"Oooh!" Sun Aiguo doesn't know much about tunneling, but he feels that this five or six meters is a bit less, and it is not easy to say clearly, so he decided to wait and say, and then report to the leader when the equipment is successful.

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

Modern cranes are hydraulic cranes, that is, there is a hydraulic column inside the crane boom, just like a fishing rod, but the hydraulic pressure is used 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 toughness and elasticity requirements of the material requirements of the crane are relatively high.

In modern times, it can be seen that when some crane booms stretch out to work, they will pull out an arc, which is the toughness and elasticity of the material.

So Bang Hai tested the materials in the laboratory again.

All the bangs for the production of the shield machine were lost to the equipment department and the maintenance department.

However, the maintenance department has recently been engaged in a 12-cylinder diesel engine, and the production task of the shield machine will be put back.

"Xiao Liu, Mr. Huo wants 6,000 small planes, 2,000 land models, 2,000 snow models, and 2,000 water models, and the price handed over to the dealer is 3 times the cost we quoted." Bangs were being tested in the maintenance department, and Sun Aiguo trotted over.

Sun Aiguo had just heard the news from the ministry, and he almost jumped up in excitement and exited the plane!

What do these four words mean?

Is this an airplane? Even if he is small, even if he has a simple structure, even if he has a low cost, but he is an airplane!

"Ahh Liu Hai was also a little surprised, he didn't expect this group of dealers to want planes too.

And Liu Hai feels that this is a good start, now it can export small aircraft, and in the future, can it be possible to jointly produce large transport aircraft?

It's a big deal to give these capitalists some shares, and in the future, all foreign markets can do without large transport planes or large passenger planes, even if they lose money to those dealers.

As long as we firmly grasp the domestic market, the two major aircraft manufacturing companies in the future sold thousands of planes to the mainland, and it can be said that without the mainland market, the two aircraft companies would not have grown to that height.

But on the other hand, what do these two companies think of us?

Now there are more 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 can not support many passenger aircraft.

At least until the 80s, when the foreign large passenger aircraft market was fiercely competitive, calculating each other, they just added fuel to the fire in it, and to see who couldn't do it, they would unite with each other.

Now that there are more dealers, the greater the certainty in the future.

"I'll change it right away." Bangs also attaches great importance to the aircraft market, and now let's make a name for it first.

Now this kind of small aircraft looks harmless, but it can be slowly upgraded, and there are still many piston transport planes in third world countries in the 21st century.

And a lot of them were World War II transport planes, operating there.

"It's been a great job!" Sun Aiguo was also very happy to hear Liu Hai's reaction, after all, it was related to the exit of the plane.

Bangs smiled, in fact, the seaplane can simply add two pontoons.

That is, the aircraft does not change its own design, but this has a drawback, the performance of resistance to wind and waves is reduced.

Because in this way, the landing gear can only be lengthened, and if it is directly extended, because the altitude of the aircraft is too high, the ability to resist wind and waves will be reduced.

A slight change in the structure of the aircraft's fuselage can increase the level of wind and wave resistance.

Recently, Liu Hai has been going back to the courtyard, because he has to enter the aircraft carrier space at night, and he uses a supercomputer to do some designs, and it is safer to go back to the courtyard.

The basement was converted into two rooms by bangs, one for stacking various items, and the other for a workshop.

Because the lights in the workshop are larger and brighter, fortunately, the electricity meters in the yard are now separated, and there are ventilation ducts in the basement, which lead directly to the top.

Every time you enter the aircraft carrier space, the bangs are on the basement side, the upper door is locked, and there is a door locking when you enter the basement, which can lower the exposed target.

"Xiaohai, there are still a lot of your dishes in the vegetable cellar, and I forgot to say it when I got off work in the afternoon!" As soon as Liu Hai had eaten, the second uncle came here and spoke.

"Why don't you help me deal with it, Second Uncle?" Liu Hai can't finish his dishes every year, because he basically doesn't eat at home, he just eats at home, and he also eats some noodles and gnocchi soup.

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

The cabbage and radish stored in winter must be stored every year, and the bangs can't be eaten every year, so they are handed over to the second uncle to deal with.

After using it for one night, Bangs took out the design of the seaplane, which could have been designed without a separate design.

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

The bangs were designed and not immediately taken out, because the other two versions, 4000 aircraft, were enough for the aircraft workshop to produce for some time.

And there's no hurry, because the dealers over there are busy applying for patents.

After applying for a patent, he signed an exclusive distribution right with Mr. Huo, and a group of dealers took over all the markets except for the big brother camp.

Because the bangs are going to assemble a 12-cylinder diesel engine here, this diesel engine is designed for tanks.

No one will have any doubts about the fact that the bangs are capable of designing and manufacturing a 12-cylinder diesel engine, because the bangs have come up with enough engine designs.

Gasoline, diesel, sea, land and air, everyone also understands that if Zhu Haiyang was not assisted by bangs, he would not have been able to design it at all.

For Liu Hai's practice, the leader did not feel that there was a problem, but felt that Liu Hai was a good student who respected his teacher.

Because of the limitations of materials and technology, the volume of the 12-cylinder diesel engine is not small, but Liu Hai dares to guarantee that the 12-cylinder diesel engine is much smaller than the diesel engine used in the tank at this stage.

When Liu Hai completely understands the diesel engine technology of the trailer on the aircraft carrier, it will be possible to produce a more compact and smaller diesel engine.

Zhu Haiyang led the team and the team of the Liuhai 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 from the side, this diesel engine technology can be said to be more advanced than the big brother.

You must know that the big brother's T62 Zhongtan is only 580 horsepower, and this diesel engine is almost 200 horsepower more according to the design.

The Type 59 tank is less than 500 horsepower, which is a little bit short.

Looking at the engine in front of him, the leaders in the molding plant were nervous and worried, and the leaders on this project had been paying attention to it, but they didn't show it.

The assembly began in the morning, and the assembly was completed after 3 o'clock in the afternoon, and the bangs were inspected and debugged again.

Finally, the engine is hoisted on the test bench, which has oil supply facilities and others, mainly to test the performance of the engine, and there are various safety measures to prevent accidents.

When ready, the bangs started the engine, and with the sound of the motor, the 12-cylinder diesel engine spewed out a cloud of black smoke, and the first time it was successfully ignited.

After the ignition, it was run for half a minute, then a series of checks were carried out again, and finally the oil was released to see if there was any problem inside.

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

The main reason is that the cost of construction is too high, and other small engines have accidents, and it is a big deal to scrap them.

For such a large engine, it is necessary to test it step by step.

"Success?" When the five-minute test was completed, Sun Aiguo asked impatiently?

"It's a success, but more tests are needed."

"Great!" When Sun Aiguo and others heard this, the stone in their hearts finally landed, even if there is a problem in the future, it is enough to continue to optimize and improve, whether there is or not, this is a key point.

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

(End of chapter)