"add!"
"Really?" The administrator frowned slightly, and without saying anything more, he continued to ask, "How much?"
"Three hundred kilograms, full weight!" Wang Yu replied.
Three hundred kilograms is the maximum capacity of this impact device.
This time, Class 9 wants to make a big splash to validate their efforts in recent days.
And Wang Yu also wanted to see whether his plan could be realized.
After another moment of silence, the administrator saw that Class 9 remained unmoved, so he could only silently activate the device.
The impact was increased to three hundred kilograms.
The speed of the iron pillar increased suddenly, and it crashed into the "dragon bone" with a trace of afterimage.
A teeth-grinding friction sound was heard.
It seemed that the tolerance limit of the 'keel' was reached, and the entire keel began to tremble slightly.
As in previous times, this was a sign of disintegration.
The entire Class Nine couldn't help but hold their breath, staring intently at the dragon bone on the impact platform.
The manager showed a look of regret.
A good piece of wood will eventually fall apart.
However, the next moment, the trembling of the dragon bone suddenly disappeared, and returned to its original state as if nothing had happened.
Until the next impact comes.
Once, twice.
Five times, ten times.
Even after thirty consecutive impacts, the dragon bone remained unmoved and lay steadily on the impact platform as steady as an old dog.
The worry on the faces of the people in Class 9 instantly turned into surprise.
The administrator's regret turned into surprise.
He couldn't understand it. It looked like it was about to fall apart, but how could it always withstand all the attacks at the last moment?
Three hundred kilograms!
Even if it works on human bones, I'm afraid it will cause sudden death on the spot.
Could it be that a piece of wood like this is harder than human bones?
On the side, a drone flying by recorded the entire scene.
Netizens were so shocked that they temporarily forgot to breathe.
Did Class Nine really do it?
The spliced keel can actually withstand this level of impact.
Teacher Ren is not just talking nonsense?!
The judges remained silent. They just frowned as they thought about the specific cause of this phenomenon.
Only Wang Yu breathed a sigh of relief after seeing the keel mortise and tenon joints fit together, twist and separate.
He knew that the thing he cared about most had been resolved.
After the impact lasted fifty times, the administrator pressed the pause button.
The keel was removed intact.
Subsequent tests are meaningless. Since the other party can withstand fifty impacts without any signs of damage, it will be the same in the future.
After handing the dragon bone back to Team Nine.
The administrator exclaimed:
"You little kids are really amazing. You can actually achieve this with just a piece of wood."
"If they go out to work as carpenters in the future, they will all be good at it."
"You will never lack for food in the future."
It can be heard that the administrator is a little envious in addition to admiration.
Student A Wei smiled and patiently corrected him: "Uncle Chang, this is the keel used for shipbuilding, not wood."
"Okay, okay, whatever you say is fine." The administrator nodded casually, then asked curiously:
"But I'm very surprised that you guys..."
"keel!"
"How did it manage to be so resilient? It looked like it would fall apart at any minute, but in the end it managed to withstand all the impacts."
The administrator is very curious about this phenomenon.
The students in Class 9 all looked at Wang Yu.
In terms of explanation, the other party is obviously more professional.
Moreover, the overall design and calculation this time was also led by Wang Yu.
Wang Yu didn't act pretentiously, and began to explain while holding the dragon bone:
“It’s mainly because of the mortise and tenon joints.”
"Teacher Ren once said that the mortise and tenon joint is a device that uses force to relieve force."
"We have simply successfully applied this device to the dragon bone."
“Didn’t you have this kind of structure before?” The administrator was still puzzled.
"Yes, there were some before, and we also considered the stress issue, but their previous connection was too tight. Although it can also relieve stress, it has limitations after all."
"We are trapped in this vicious cycle because of our limited understanding of mortise and tenon joints."
"The mortise and tenon joints don't actually need to be too tight. All we have to do is maximize the effect we need."
"On the keel, what we need most is to unload the force, and stability can be appropriately relaxed."
"So, I left some tiny gaps in each mortise and tenon structure."
"With these gaps, the force on each mortise and tenon can be easily transferred to the air and will not continue to act on the next mortise and tenon."
"In this way, the force unloading effect can be achieved well."
"Also, because of the existence of these gaps, there is more room for movement between each mortise and tenon connection point, which also helps with stability."
"Although they look shaky, they will definitely return to their original positions with the overall structure."
“I just figured this out recently.”
“When I was making the mortise and tenon joints before, I left enough space because of my poor technique, which made the work look abnormally shaky, but it just wouldn’t fall down.”
“That’s how I got introduced to this approach.”
"No wonder you always left some gaps when you were making it before. It's not because your craftsmanship is too advanced~"
Upon hearing this, the students in Class 9 were the first to express their feelings.
Although they could understand this to some extent, they did not comprehend it as carefully as Wang Yu.
It is a feeling in their hearts.
But for Wang Yu, it became a principle.
After hearing this, the students in Class 9 felt as if they had suddenly seen something new.
Listening to the new classmate's sigh, Wang Yu nodded calmly:
"Actually, it's mainly because the craftsmanship is too trendy, otherwise we can do better."
The students in Class 9 staggered instantly.
Damn, this guy is too serious!
At this point, the administrator finally figured out the details.
He breathed a sigh of relief:
"Students nowadays are really not simple..."
Then the next moment, he asked a question that made Team Nine lose their defense in an instant:
"Since you said this thing is a keel, you want to use it to build a ship."
"So how did you solve the pest problem?"
"Once wood gets wet, it's easy for insects to breed."
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