After a sigh.
The students in Class 9 could only put away their depressed hearts and start looking for new "keel" wood among the vast amount of wood again.
The keel is no different from other products, and the quality requirements are much higher.
The first is length and width.
Thick, long and hard are the first elements.
And in order to make it more convenient later, it is best to have a slight curvature, which is the most suitable keel.
The one they found before took them a while to find.
But he was 'taught away' by his own teacher.
They could only start searching again.
Fortunately, with the experience of the first time, it was not difficult to find it again.
Soon, Class 9 found another useful piece of wood.
The species is fir.
Although the length is not as good as the previous one.
But this one is thicker and has a very hard texture.
In addition, its easy processing and corrosion resistance make it an excellent choice for keels.
After finding the right wood, Team 9 marked it again and sawed it into the shape they wanted.
Sparks and sawdust flew everywhere, and a harsh friction sound was heard...
Several students started working at the same time and soon cut out the keel model.
Afterwards, the student on standby immediately took out the "keel", placed it on the work platform, picked up the planer and started grinding.
They have checked and found that the keel must be smooth and flat. Only in this way can it better connect with the side keels and many ribs.
It can be said to be an indispensable link.
The rubbing sound continued to be heard, and the shavings rolled up little by little.
As time went by, more and more shavings were collected and the entire keel was polished into shape.
Finally, after using sandpaper to polish off the small debris, a four-meter-long, two-meter-wide "keel" with a slight curvature was completed.
Look at this realistic dragon bone.
Netizens and judges outside the screen kept expressing their feelings.
Class 9 has grown so much without us realizing it.
Shipbuilding is a very difficult task, but they actually completed the most important step by themselves.
The keel in front of them, in terms of appearance and degree of polishing, is not much different from the keel bones they found on the Internet. At a glance, they can tell that it is definitely qualified.
However, while everyone was praising him, the judge, Keji, clicked his tongue:
“This is not right…”
"Although this keel looks perfect, isn't it still a little too small?"
"If Team Nine is going to build an ordinary ship, this keel will definitely be enough."
"But what they want to build is the Ming Dynasty treasure ship. The design they provided shows that the length alone is 150 meters."
"This keel is only four meters long. It looks like it's not enough..."
Hearing this, the judges were stunned.
They really didn't notice this just now.
So what should Class Nine do next?
They turned their attention to the live broadcast again.
......
Inside the warehouse.
The students in Class 9 looked at the dragon bones in front of them, their expressions somewhat conflicted.
They also realized the problem of insufficient length.
Previously, they only analyzed and drew the data, but did not consider the size issue too much after the map was completed.
Subconsciously, I believe that as long as I follow the design, there won't be any major problems.
So I put more energy into other areas.
Moreover, four-meter-long trees still look very intimidating at first glance, so they subconsciously think that these woods are enough to serve as keels.
However, they did not discover the problem until they were ready to make the ribs after they finished shaping them and compared them with the design drawings again.
It was also the first time that they realized the gap between design and reality.
The gap between the two is reflected in the hard data.
The shock it brings is completely different.
The larger the scale, the deeper the feeling.
It is also easier to overlook when first making it.
In addition to length, they also discovered another problem, which is curvature.
Although the keel in front of you is curved.
But this arc is too small after all.
According to the design drawings, the Ming treasure ship was divided into at least five layers.
The bottom layer is an empty bottom warehouse, which is about 70 to 80 centimeters high.
The second and third floors are for storage, and their combined height is at least two meters.
The remaining two floors are rest cabins for the crew, and are also two meters high.
Above that is the deck.
Judging from the data alone, the entire hull is at least five meters wide.
The keel is a piece of wood that runs from the bow to the stern, connecting the entire ship.
In other words, the curvature on both sides of the keel must be at least five meters high and form a perfect streamline.
Only in this way can the resistance encountered by the ship be minimized when sailing.
These are all the results of their careful calculations over the past few days.
They were very happy about this for quite a while.
Although they were poor students, they actually used mathematics to solve a difficult problem in front of them.
But now, they seem to have considered this problem too simply...
Shipbuilding was much more troublesome than they had imagined.
"Or, let's make another one, mark the required curvature this time, and polish it again. That way, the curvature will be there."
"As for the length, let's think about what to do next?"
"Or maybe just buy more than a hundred meters of wood?"
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