"It's done, it's done!"

"This is the keel that brings all our hearts and minds together!

”

In the warehouse, the keel team surrounded by Class 9 students let out a heartfelt roar.

In the middle, Xu Kai held a keel high in both hands, looking up at the sky as if he was doing some kind of ritual.

On the side, Li Cheng, Wang Bo and others looked inevitably excited.

This keel is the keel with the longest production hours, the most care, and the most complex mortise and tenon structure in the past few days.

It can be said that it is a collection of all their efforts in the past few days.

Whether it is the analysis of the force, the calculation of the impact, and the consideration of various details, they have reached the limit of what they can achieve at present.

If they still fail this time, they really don't know what to do.

Eighty percent still have to ask themselves about the cheap teacher.

But in the past few days, I have been competing with each other in the 'cheap' aspect.

Wouldn't it be a little embarrassing to ask now?

Doesn't this mean that we take the initiative to admit defeat?

The students of Class 9 shook their heads slightly.

In this regard, they really don't want to throw in the towel easily.

Be sure to combat Teacher Ren's arrogance.

Otherwise, I am afraid that the other party will become less and less human in the future!

"Anyway, let's go test the actual impact now."

Wang Yu, who was in the crowd, pushed his glasses, and the pen in his hand almost slipped into his face.

"Yes, yes, test, test!"

Only then did the people of Class 9 come to their senses and walk towards the outside of the warehouse with dragon bones.

In this regard, Ren Yan is used to it.

Since there was no device in the warehouse for them to meet the actual force, they would go outside to find help every time they tested.

It's not clear, though, what they're testing with.

But Ren Yan didn't panic at all, and he had no intention of moving his position.

Anyway, we'll know the result later.

With what he knew about the students, these guys couldn't hide anything.

But whenever something happens, it is always the first to show it.

If it fails, it must be the frustration of the past.

If it succeeds, you will have to be happy if you don't come back.

So watching the students drift away, Ren Yan was unmoved, and even yawned.

......

Port area, in a warehouse for auto parts.

The administrator looked at the group of students in front of him, and his eyelids twitched:

"You're testing your wood again?"

"This is the ninth time in three days..."

"Even if I help you for free, you can't be so woolly..."

"If it goes on like this, I'll have to charge for it~"

The management of the hand work that was a little painful to put down, and looked at the 'wood' in Xu Kai's hand.

Hearing this, the students of Class 9 laughed for a while.

"Uncle Chang, how can you say it's wood, we are a keel ~ keel for shipbuilding ~"

"Don't test it for the sake of safety~"

"And you don't have much to do on weekdays, so it's up to you to help us make an impact."

"You can't bear to reject a group of idealistic young people like us?"

The Administrator gave them a blank look:

"I don't know if there are ideals, but you're quite annoying anyway."

"Let's talk about it in advance, at most twice a day in the future, you Uncle Chang can't bear it."

The students of Class 9 nodded hurriedly, and then the manager took the keel in Xu Kai's hand and walked towards the corner of the side of the warehouse.

There is a special equipment for impact testing, although it is mainly used to test certain parts of the car.

But because the force can be adjusted, the upper keel can barely have an effect.

This place was also found with great difficulty in Class 9, and all the tests for this period were completed here.

Soon, the keel was placed on top of the device, and the management started the device.

The dynamics are set the same as last time, starting at 100 kilograms.

The impact begins immediately.

A solid iron pillar kept moving back and forth, hitting the 'keel' with a 'bang' sound.

But the keel is unmoved, without the slightest intention of damage.

Seeing this, the administrator raised an eyebrow.

Last time at a hundred kilograms, this wood made a 'kaka' breaking sound in an instant, but after this short day, the tolerance of this wood has improved so far?

It seems that this group of students is not just talking.

The management moved in his heart and silently increased the intensity of the impact.

One hundred and fifty kilograms...

Two hundred kilograms ...

Two hundred and thirty kilograms...

The impact strengthened little by little, but the keel was still as steady as an old dog.

Aside from some slight dents on the impact surface, there was no other 'damage' along the entire keel.

On the side, the students of Class 9 clasped their hands and their eyes sparkled.

There was a suppressed look of excitement on his face.

After all this time, they finally managed to get a keel that might be qualified!

Although it is only 230 kilograms at present, it is still far from their expected goal.

But at least it's the right path!

"Do you want to add more?"

"This piece of wood is already very good, if you add it, it's a pity that it's damaged."

The Administrator paused the onslaught and looked inquiringly at the students of Class 9.

After a short silence, the students of Class 9 glanced at each other, and Wang Yu nodded heavily:

"Plus!"

"Really?" The administrator's brows furrowed slightly, and he didn't say anything more, but continued to ask, "How much?" ”

"Three hundred kilograms, full weight!" Wang Yu replied.

Three hundred kilograms is the maximum amount of this impact device.

This time, Class 9 wants to come to Boda to verify their efforts in recent days.

And Wang Yu also wants to see if what he planned can be realized.

After a moment of silence, the administrator saw that Class 9 was still unmoved, and could only silently activate the device.

The shock was raised to three hundred kilograms.

The speed of the iron pillar increased violently, and with a trace of afterimage, it slammed towards the 'dragon bone'.

A tooth-wrenching grinding sound was heard.

As if the 'keel' had reached its tolerance limit, the whole keel began to tremble slightly.

As it did the previous times, this is a sign of falling apart.

The whole of the ninth class couldn't help but hold their breath, staring at the keel on the impact platform.

And the management showed a regretful expression.

A good piece of wood will inevitably fall apart in the end.

The next moment, however, the trembling of the keel suddenly disappeared, and it returned to its original state as if nothing had happened.

Until the next shock arrives.

Once, twice.

Five, ten.

Until thirty consecutive impacts, the keel was still unmoved, lying firmly on the impact table as steady as an old dog.

The worry on the faces of Class 9 instantly turned into surprise.

The administrator's regret turned into consternation.

He couldn't figure it out, he looked like he was about to fall apart, how could he always withstand all the shocks at the last moment?

Three hundred kilograms!

Even if it is applied to human bones, I am afraid that it will only be a violent death on the spot.

Could it be that such a piece of wood is harder than human bone?

On the side, the floating drone recorded such a scene completely.

Netizens were also shocked and temporarily forgot to breathe.

Did Class 9 really do it?

The spliced keel can really withstand this level of impact.

Teacher Ren isn't talking again?!

The judges still didn't say anything, they just frowned and thought about the specific causes of this phenomenon.

Only Wang Yu, after seeing that the keel mortise and tenon joints fit each other, twisted and separated, he breathed a heavy sigh of relief.

He knew that what he cared about most had been solved.

After the shock lasted fifty times, the Administrator pressed the pause button.

The keel was removed intact.

There was no point in the follow-up test, since the opponent could withstand fifty hits without any signs of damage, and the same would be true for the future.

After putting the keel back into the hands of Class Nine.

The administrator exclaimed:

"You little dolls are really not simple, a piece of wood has really done it to this extent."

"This is going to go out to work as a carpenter in the future, and everyone is a good hand."

"You won't be short of food in the future."

It can be heard that the administrator is not only admiring, but also has some envy.

A Wei smiled and corrected tirelessly: "Uncle Chang, this is a keel for shipbuilding, not any wood." ”

"Okay, okay, whatever you say, it's what you say." The administrator nodded casually, and then said curiously:

"But I'm weird, you wood..."

"Keel!"

"How did you manage to be so tough, it looked like it would fall apart in minutes, but in the end, it resisted all the impacts."

The administrator is curious about this phenomenon.

The students of Class 9 looked at Wang Yu in unison.

In terms of explanation, it is obvious that the other party is more professional.

Moreover, the overall design calculation this time is also led by Wang Yu.

Wang Yu was not hypocritical, and began to explain with the keel:

"Mainly because of the mortise and tenon."

"Teacher Ren said before that mortise and tenon is a device that uses force to unload force."

"We've just successfully applied this device to the keel."

"Didn't you have this structure before?" The administrator was still puzzled.

"Yes, there were before, and we also took into account the problem of force, but they were too closely connected before, although they can also have the effect of unloading, but after all, they have limitations."

"We also fell into this vicious circle because of our ignorance of mortise and tenon joints."

"Mortise and tenon, in fact, there is no need to combine too closely, what we have to do is to give full play to the maximum effect we need."

"On the keel, what we need most is unloading, and the stability can be appropriately relaxed."

"So, I left a few tiny gaps in each mortise and tenon structure."

"With these gaps, the force exerted on each mortise and tenon joint can be easily transmitted into the air, and will not continue to act on the next mortise and tenon joint."

"In this way, it can achieve the effect of unloading force very well."

"And it's because of these gaps that there is more space to move between the connection points of each mortise and tenon joint, which also helps with stability."

"Although they look shaky, they will definitely return to their original places under the overall construction."

"I've only recently figured this out."

"When I was making mortise and tenon joints before, I left enough space because I was not skilled, which caused the work to look unusually shaky, but it just didn't fall."

"That's how I got into it."

"No wonder you always left some gaps when you made it before, the feeling is not that the craftsmanship is too trendy~"

Hearing this, the students of Class 9 took the lead in expressing their feelings.

Although they can more or less understand this, they are not as meticulous as Wang Yu comprehends.

In their hearts, it was a feeling.

As for Wang Yu, it has become the principle.

This also made the students of Class 9 feel like they were suddenly opened.

Listening to the emotion of the new classmates, Wang Yu nodded unhurriedly:

"Actually, the main thing is that the craftsmanship is too trendy, otherwise we will do better."

The students of Class 9 stumbled in an instant.

Damn, this person is too serious!

At this point, the administrator has finally sorted out the joints.

Quite comfortingly:

"It's not easy to be a student nowadays..."

Then the next moment, he asked a question about the defense of the other nine shifts in one second:

"Since you say this thing is a keel, it needs to be used for shipbuilding."

"And how did you solve the pest problem?"

"Once the wood gets wet, it can easily breed insect infestations."