Li Wei looked around at everyone, thought about it and explained: "It's like an oil lamp, a thing as small as a wick can burn all the time without extinguishing, just because it burns lamp oil, not the wick itself, you understand?" ”

At this point, the students no longer cared about what he said, and only cared about writing down what he had just said.

Only Fang Xiaoru, who was on the side, showed a sudden expression, and understood that Li Wei's "spell" was actually to burn alcohol and insulate the heat with water, which was probably what it meant.

However, even if he understood, this "spell" still amazed him.

Li Wei looked at these students who were still ignorant, and he was not in a hurry, and said softly: "It doesn't matter if you don't understand, as long as you know that this is science, as long as you study hard in the future and learn what I taught you, you will understand." ”

"Teacher, if you learn science, can you fly in the sky like a fairy?"

One student asked, raising his hand.

Li Wei smiled lightly and said, "Of course you can!" ”

Fang Xiaoru was shocked at first when he heard this, and then suddenly realized that this was just a white lie told by Li Wei to deceive the child in order to arouse his interest in learning.

"This Lord Li!"

Fang Xiaoru shook his head secretly, but he didn't debunk him on the spot, after all, this is also for the good of the students.

However, to his surprise, Li Wei explained to the student seriously.

"In fact, air is the same as water, it is a kind of fluid, we may use the boat pulp to paddle the water to make the boat move forward, then we can also make a pulp to paddle the air, so as to fly to the sky!"

Fang Xiaoru was a little shocked when he heard his words: "Master Li, are you serious?" ”

Li Wei turned his head and glanced at him: "Of course!" ”

Fang Xiaoru was stunned, although he couldn't understand what Li Wei said, but looking at Li Wei's appearance, he seemed to be really confident that he could fly into the sky, which made him feel unbelievable.

The students didn't have such complicated ideas as him, they just felt that since Mr. Li knew fire spells, it was natural for him to be able to fly into the sky.

Immediately, all the students cheered again.

It just so happened that Li Wei also prepared some small things that could fly today, so he took them out.

"Come on, let's take a look at this."

What Li Wei took out was something similar to a bamboo dragonfly, with a paper cup hanging underneath, and a relatively thin and short bowstring in it, which was made of animal tendons.

The bowstring is wound around the bamboo dragonfly's hinge, and two wings are propped up on the paper cup.

"You've all played with bamboo dragonflies, right?"

"Played!"

These students are all children of craftsmen, and bamboo dragonflies are not difficult to make, and most of these children have played with them.

"Actually, it's a kind of rotating pulp, and when it rotates, it will move the air, thus pushing the bamboo to fly into the sky."

Li Wei first explained briefly, and then pointed to the small toy in his hand and said: "Usually everyone plays with their own hands, but this one is different for me, it will turn by itself." ”

As he spoke, Li Wei turned the bamboo piece upside down a few times, and then lifted the thing forward and held it lightly.

Driven by the elastic force of the bowstring, the bamboo piece quickly spun and flew into the sky with this paper flying cup.

"Look, this is science, as long as we master science, we can make a bigger one, and then we can fly into the sky with us!"

Li Wei pointed to the paper cup airplane that flew into the sky.

The students all looked up and applauded as they watched the thing fly higher and higher.

Fang Xiaoru looked at this thing, he seemed to roughly understand what technology Li Wei was talking about, that is, the skills of craftsmen are very high, high enough to change the world, just like the legendary Lu Ban.

However, can the craftsmanship of craftsmen really be so high?

Fang Xiaoru frowned slightly, a little unbelieving in his heart, and even had doubts about the technology that Li Wei said.

Amid the cheers of the students, the paper airplane flew four or five meters high before it fell.

Li Wei stepped down from the stage and picked it up, then took it apart and began to explain the principle to the students, and gave them homework to make their own.

The glove fire experiment is still a bit dangerous, and it is not suitable for these students to try it on their own, but this thing is fine, and this thing is also complicated, which is suitable for cultivating students' hands-on ability.

After working for a long time, Li Wei finally taught the production method to the hundred and eight generals, and explained the principle to them carefully, hoping that they could study hard and become their own help in the future.

Li Wei has been in Daming for almost two years, there are many things he wants to do, but he hasn't made it until now, it's not that he can't, but he really has no energy, a person's energy is always limited, he has to do it, and the Minghuang Chamber of Commerce has to be busy, which is almost equivalent to the workload of a listed company CEO and senior officials, and now there is a academy, even if he is often lazy and puts all the work that his subordinates can do, he is still too busy.

If he didn't hurry up and train a group of capable students to serve as assistants, I am afraid that many of his ideas would only stay at the idea stage.

asked the students to pack up their things and go back to the house, and Li Wei and Fang Xiaoru also went back to the office.

The two rested for a moment, and Fang Xiaoru finally couldn't help but ask, "Master Li, is the technology you are talking about these craftsman skills?" ”

"Pretty much."

Li Wei was slightly stunned when he heard this, and said casually.

In fact, it is not right to say that science and technology are craftsman skills, craftsman skills are only a form of scientific application, in fact, the application of science and technology covers all aspects of society, and it is not just as simple as craftsman skills.

It's just that when he says this now, Fang Xiaoru can't understand it.

"Relying on the skills of these craftsmen, can you really cultivate a hundred acres of land and produce more than 10 stones?"

Fang Xiaoru asked with some suspicion.

Li Wei glanced at him and understood that he was suspicious of the value of technology.

After thinking about it, Li Wei said: "You should have seen the kettle when boiling water, the lid of the kettle will be opened and jumped, right?" ”

Fang Xiaoru bowed slightly: "I've seen it." ”

"That's fine, you see, if I attach this lid to a pole, and then the pole is connected to the wheel, as long as the structure is properly designed, can the wheel be pushed to turn?"

Fang Xiaoru frowned and said, "Impossible, something as small as the lid of the pot can't lose its wooden wheel like a waterwheel." ”

"Why not? I might have used a bigger kettle, or a smaller wheel. Li Wei emphasized.

Fang Xiaoru thought about it for a while, and felt that this didn't seem to be impossible, so he reluctantly bowed his head and said:

"Well, even if it could, so what?"

Li Wei glanced at him disdainfully, what else can he do, then he can promote the industrial revolution!

"Since I can push the wheels, then I can make it into a car, can I just run away from the fire? Can I use this cart to install a plough instead of a plough? Equipped with a rotating sickle, can it be used to cut wheat? As long as this is done well enough, it is easy to cultivate a hundred acres of land, and only one person is needed to operate it. ”

Li Wei briefly talked about the harvester of later generations, although it is impossible to make this thing with a steam engine, but there is nothing wrong with explaining it to him, anyway, he does not understand the difference between a gas turbine and an external combustion engine.

Although Fang Xiaoru still felt unbelievable when he heard it, but after thinking about it carefully, it seemed that this was also possible, and he was skeptical for a while.

"Can you really make something like this?"

Li Wei pursed his lips and said confidently: "You will see!" ”

It is very difficult to make an internal combustion engine, and its biggest technical difficulty is precision machining.

It's not like a steam engine, and it's just as useful for air leaks, but it's less efficient.

Although he doesn't need to try various fuels one by one like those scientists in the past, and he doesn't need to verify various scientific theories, he can do it directly.

However, without the right materials and sufficient precision processing equipment, there are many things that he knows how to do and cannot make them.

Ask for a commuter pass

(End of chapter)