After the long-forgotten memories were triggered, Ren Yan felt filled with emotion.
But then, he focused his attention on Xu Kai's drawing again:
"In fact, this sail has more advantages than what Xu Kai just mentioned."
"In addition to being able to handle winds from all directions and maintaining a stable speed, it also has the advantage of being safe."
"This shutter-like construction method also eliminates the fact that it is difficult to raise and lower the sail every time with a traditional sail."
"As long as we connect the ropes on this sail so that each rope can control a small area and then converge on the main rope, it can be raised and lowered just by pulling the ropes."
“The principle is almost similar to that of Venetian blinds, and we no longer have to climb up and down.”
"And the number of people can be greatly reduced. Even if it is the main sail, two people should be able to handle all situations."
"So, after we change to this set of sails, the situation where more than 20 people had to control the sails like before should not happen again."
After saying that, Ren Yan looked at Xu Kai deeply, his eyes full of admiration.
As he finished speaking, Wang Bo and the others were completely petrified. They opened their mouths for a long time and finally uttered only one word: "national quintessence".
"What the hell..."
Only Wang Yu, looking at the sail on Xu Kai's drawing with his eyes gradually narrowed, began his own brainstorming again.
After a moment, he sighed a little exhaustedly, his eyes full of admiration, but his tone gradually became more serious:
"This is all right, what's the brain of Xu Kai like?"
Xu Kai, on the other hand, didn't care about all this at all. After Ren Yan finished speaking, he immediately slapped his thigh and stood up excitedly:
"Teacher Ren, you understand me!"
"Look at my classmates. They actually think I'm talking nonsense!"
"They helped me make the sails just for fun, and I had to beg them~"
After saying that, Xu Kai glanced at the students in Class 9 with a hint of complaint in his eyes.
Seeing this, Ren Yan nodded seriously and gave a solution:
"That's right, they're going too far."
"In that case, why don't you make the sail and slap them in the face?!"
"And if they want to use it later, you can even charge them!"
As soon as these words came out, Xu Kai's eyes lit up immediately, and the students from Class 9 beside him immediately glared at Ren Yan:
"Teacher Ren, you are openly creating division!"
"We are a team in Class 9. How can you say such a thing?!"
"That's right!"
"Still charging a fee, is this worthy of our friendship?"
Here, a group of classmates were complaining, but Ren Yan remained unmoved and just smiled without responding.
Wang Yu added quietly, "You guys are probably worrying too much."
"Teacher Ren's words are obviously just empty talk."
"Since Xu Kai has already done it, he must be on the ninth shift. Can he really not let us use it?"
"Unless Xu Kai doesn't plan to install it on Class 9."
As soon as these words came out, everyone in Class Nine fell silent, and once again gave Ren Yan a cold look:
"Cheap teacher, you've never been a human being!"
At this time, Xu Kai replied sinisterly: "Humph~ Even if you guys in Class 9 can use it for free."
"But in other aspects, I can still prevent you from using them."
Hearing this, everyone in Class Nine smiled, trying their best to restrain themselves from laughing out loud.
Are you kidding? Where else can we use this thing except on Class 9?
However, in order to make up for their perfunctory behavior towards Xu Kai, the people in Class 9 chose to admit defeat:
"Yes, yes, the elder is right~"
"Now, let us help you make this sail?"
"Don't worry, we will definitely take it to heart this time!"
"Hmph, that's more like it~" Xu Kai nodded arrogantly and began to arrange the work of making the sails again.
At the side, Zhang Ting also came to Ren Yan and watched everyone in Class 9 busying around with a smile.
She really liked the cheerful but definitely not annoying atmosphere of Class 9.
This time, with the full assistance of everyone in Class 9, Xu Kai’s sail was quickly made.
The difficulty of making this set of sails is not high, it can even be said to be very easy.
At the very least, it is several dimensions lower than the ordinary triangular sail.
It does not need to consider the size of the wind, the direction of the wind, or the effect of the rope on the sail.
All that was needed was to replicate the sail seamlessly according to Xu Kai's design.
This was a piece of cake for Team 9, who had already mastered many different things by hand, if they hadn't been working in a perfunctory manner before.
They can do this little thing with their eyes closed.
Fortunately, this attitude has been completely dissipated in the in-depth understanding just now.
Therefore, this new sail system appeared in front of everyone after more than ten minutes.
Looking at the sail that looked like a Venetian blind and seemed extremely fragile, everyone couldn't help but fall into doubt.
"Is this thing really as reliable as Xu Kai and Teacher Ren said?"
A classmate picked up the sail with both hands and spoke hesitantly.
There was also some suspicion in the eyes of others.
"Hey, it works, why don't we just give it a try?" Li Cheng waved his hand nonchalantly: "No matter how much you think about it, it won't be as effective as practicing it once."
"And there's no need to replace the sails of Class 9 for the first time. Anyway, the thing we're making now isn't very big. We can just take out a lifeboat from the bottom compartment and install it to see the effect."
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