Li Shimin said, and his mood seemed to be getting better again.

He remembered something and said, "Why does the Tiance Army cost so much?"

"It requires a large amount of muskets and gunpowder." Speaking of this, Zhang Qian answered several times. He knew that Li Shimin attached great importance to the Tiance Army. This was the card of His Majesty, so he had conducted a detailed investigation.

At this time, he continued: "Not to mention the artillery, I heard that every time the artillery is in full swing, it costs a lot. Not to mention the others, there are also the cavalry. I heard that their cavalry was wrapped with armor pieces and men and horses. The cavalry wore armor forty-two kilograms, and in addition, there were vests, vests with armor for fifty-eight kilograms. These were all made of steel, and I heard that it was very labor-intensive, so it cost a lot."

Li Shimin couldn't help but say in surprise: "The total number of this man and horse is nearly 100 kilograms of armor. How can we fight?"

Li Shimin can be said to have been in a military life, and he has not seen armor and armor. Some armor is indeed very heavy, but the heavier the armor, the better the protection!

But even so, I have never heard of all this man and horse wrapped in armor.

He also conducted a detailed investigation, but it was just some superficial data, which did not mean that he really understood it. So when Li Shimin asked this, Zhang Qian didn't know how to answer.

"Okay." Li Shimin waved his hand and said, "I understand."

He didn't care more, anyway... let Chen Zhengtai go and play by himself.

Zhang Qian breathed a sigh of relief and nodded, "Here."

…………

On the other side, Chen Zhengtai finished riding and then left the camp and took a four-wheeled carriage to go home.

Sometimes, Chen Zhengtai himself found it ridiculous and came to the camp to learn horse riding, but on the way back, he took a car. This was quite a sail for some later fitness enthusiasts. They depended on four wheels to enter and exit. They drove to the gym to exercise, and then drove home, even if the place was only three or four miles away from their home.

Now Chen Jifan has grown up a lot and can speak some simple words or barely stand still. However, if he is left standing on the ground, he dare not take a step. He just looked around in confusion and cried in fear.

So when he cried, the maids and eunuchs around him were so scared that their faces looked like earth, and they rushed to pick him up and comfort him.

Chen Zhengtai felt that this was not a solution. He could not let this guy live so pamperedly. Otherwise, God knew that he would develop a rebellious temperament.

But it is obvious that Chen Zhengtai has the final say in raising children. Chen Zhengtai can at most make some suggestions, of course... these suggestions are about to be rejected.

So, when he was at home, he occasionally hugged Chen Jifan in the name of taking care of his children. After he left Princess Sui'an's sight, he hid in a corner and put Chen Jifan alone.

Chen Jifan stood with his legs shaking, and was so scared that his little face began to show his sad face. He was about to raise his throat. Before he could cry, he had already fallen to the ground.

"Come on, stand up by yourself." Chen Zhengtai used his feet to tamper with his feet on Chen Jifan on the ground, with a serious face.

Chen Jifan refused to get up, so he rolled on the ground like a beating, and cried.

The family of young people who heard the crying sounds in the distance were already coming. When they arrived, they found that Chen Zhengtai was holding Chen Jifan and humming and comforting: "Don't cry, don't cry, my own son..."

The eunuch who specialized in serving Chen Jifan stepped forward and said, "Your Highness, I think the child is a little bit receptive to his child."

"I think this is the case, but I brought too little! I carried him and walked away, and he cried so hard, but I am his biological father, something that my relatives don't recognize." Chen Zhengtai hugged Chen Jifan and returned to the eunuch.

The eunuch said happily: "Your Highness just loves to cry on weekdays."

Chen Zhengtai nodded and said nothing. He did not have much malice towards these eunuchs.

After all, it's a pitiful person.

In later generations, he was also influenced by various film and television dramas, and he peeped at eunuchs with some kind of tinted glasses, and even had bad taste.

But the real contact is actually all flesh and blood. Most people, although they were cut off, were not perverted. When they were in the palace, they were taught a lesson and almost lost their self-esteem. Everything was subject to the master's orders. The fate of a lifetime was already destined, and most people could not stand out. They were just a group of traitors after being castrated. In this way, they were ridiculed by all kinds of people who had the right to speak and regarded them as monsters. This was a bit cruel.

After looking at his son who looked aggrieved, Chen Zhengtai couldn't help but remind him again: "Don't spoil him everywhere on weekdays. If you are disobedient sometimes, you should punish him when you should."

Of course, Chen Zhengtai said this, and he was actually very clear that these eunuchs dared not, but he still couldn't help but say it.

Who said this is his son? As parents, who doesn’t want their son to learn well?

The eunuch dared not look up at Chen Zhengtai, but was just timid.

Chen Zhengtai nodded and walked away, but he couldn't help feeling a little sad. In this world... I think there are many such people. They are submissive and live in vain, just to survive. However, since ancient times, the word "living life" seems to be just a basic right of a person, but it is so difficult!

Even if it is not a prosperous era, it has been generally peaceful. However, any natural disaster or plague, even a small turmoil, will be harvested like grass.

How good can it be in a peaceful and prosperous era?

Of course, people in this world actually have a lot of attention to life and death. I think... they have been exposed to it for a long time without a rooster crowing, and their bones are exposed in the wild. When they are used to death, they naturally regard death as a common thing.

Chen Zhengtai sighed in his heart. He couldn't understand why people in later generations were keen on troubled times, longing for the so-called heroes who had risen in troubled times.

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If it were yourself, I would only wish to be in a peaceful and peaceful world forever, and brag quietly with others in the quiet and peaceful way of time.

After all... the productivity is too low.

Chen Zhengtai felt that he should have been able to help grow. No matter whether he succeeded or not, he should give it a try!

When he arrived at the study, he saw Wu Yu's face was gloomy, as if he was looking forward to Chen Zhengtai's arrival, and said with a smile: "My teacher... the cylinder of the steam locomotive has been successful."

"oh?"

This was great news, and Chen Zhengtai immediately cheered up: "You tell me I'll listen."

"We made a cylinder, which seals the piston connecting rod and cylinder head, and uses cork. When this cork is pressed and encountered water, it will expand and has excellent sealing properties. But as for this cylinder, it is cast with pig iron..." Wu Yu said endlessly. (Thanks to the information provided by the book friend Wuyan Team B)

When Chen Zhengtai heard this, he probably understood something. He came from the previous world, so he was thinking about the strong sealing nature of rubber, but he didn't expect that before rubber appeared, humans had their own methods.

Cork... and it uses the principle that cork expands after encountering water. There is a large amount of water vapor in the cylinder...

All of a sudden, everything suddenly became clear, so he said, "Have you verified it?"

"It has been verified." Wu Qing nodded and said, "The new cylinder has been installed on the experimental car, so it can really leave."

Being able to leave... For Wu Zhi, it is the most rare thing in the world.

There is no need to rely on manpower or horsepower. You only need to burn coal and water on the vehicle to generate steam and enter the cylinder. Then the cylinder drives the piston connecting rod to push the wheels forward. Especially after solving the problem of piston and cylinder sealing, the power of this steam locomotive can be greatly increased and the steam is not wasted at all. In this way, a smaller boiler can be used, and the weight of this steam locomotive can be greatly reduced.

Chen Zhengtai was not surprised at all about whether it could leave. What he cared more about is whether the car was practical.

Otherwise, if you can just barely leave, it will be nothing more than a strange trick or a lewd thing!

He thought about it and asked again: "Have you calculated it?"

"It's calculated." Wu Qing said: "According to the teacher's method, we put the steam locomotive on the rails. We can roughly calculate that the current steam locomotive has the power of thirty-three horses to pull."

Thirty-three horsepower...

Chen Zhengtai frowned, feeling that this thing was a bit useless.

It seems to be a little less.

But for Wu Xi, it was a very happy thing. She said with an excited smile: "Thirty-three horses can pull things on the rails, a car that can move by itself, can be pulled. Mentor... don't you think it's amazing?"

"It's still a little short." Chen Zhengtai said seriously: "If it's only thirty-three horsepower, if it's done, a horse can pull 150 kilograms, and this steam locomotive will just pull 5,000 kilograms of goods."

Chen Zhengtai's words undoubtedly poured a basin of cold water on his head.

In fact, in terms of the carrying capacity of this era, 5,000 kilograms is already very terrible. In later generations, nearly three tons of goods are not worth mentioning, but in this era, it is simply epoch-making significance!

The same car can be worth thirty-three cars, and horses need to rest, but steam locomotives do not need it. As long as there is sufficient coal, they can run continuously for days and nights.

Why don’t people in this era excited?

Of course... Chen Zhengtai has seen better, so he naturally hopes for more.

"You think of a way, think about the physics book, whether it is power, friction, or gravity, and see if there is anything that can be improved...more and improve... Come and take the drawings to show me."

Seeing that Chen Zhengtai was very serious, Wu Qi did not dare to neglect it. He hurriedly handed over the latest drawings to Chen Zhengtai. Chen Zhengtai was confused when he saw it. Wu Qi was patiently explaining it, so he roughly understood.

But in the end, Chen Zhengtai found that he was actually a layman and seemed to have no way to provide advice. In the end, he had to say, "Let me think of a solution, is the money from the institute enough?"

"The money from the institute is already sufficient." Wu Xi also became serious at this time and said, "My teacher feels dissatisfied, I think about it again."

Chen Zhengtai nodded: "Re-examine the boiler, chimney, cylinder, moving wheel, rocker, connecting rod, flywheel, to see where you can improve. If you take it slowly, there is no need to hurry."

Wu Qi nodded. She had some confidence. After all, everything was difficult at the beginning. In order to make trouble for this thing, she mobilized almost all the workshops, spent countless money and food, and also collected hundreds of people from the institute to work hard. Now... at least she has understood the principle of the steam train and has a prototype of moving forward. So what to do now is to make progress in one direction.

Chen Zhengtai is also very confident in Wu Ju and others. There is never a shortage of smart people in this world, but countless smart people have not used their brain power in the right direction.

As long as you have money and provide a direction, you will not worry about no one moving in this direction.

The practicality of this steam locomotive is actually just a matter of time.

Just like Chen Zhengtai, who relied on his innate advantage of being a human being, savagely kicked open a door that humans had never entered before. Although this door only opened a gap, it allowed the smartest people among human beings to see the world behind the door. Then it was only a matter of time before this door fell down.

Of course... steam locomotives... are epoch-making significance, but in the process of spending countless manpower and material resources to study steam locomotives, they set an example. Once the steam engine can be used to make the car run on the rails, the equipment of various other steam engines will inevitably begin to be promoted!

Whether it is the future, steam textile machines, steam water lifters, or future smelting, textiles, machine manufacturing and other fields, it may be widely used.

People's most concerned about steam engines is steam trains, but in fact, its wide application can be described as epoch-making.

There is a huge improvement in all production.

And this... is not the most important.

What is important is that when people try the benefits of steam engines, they will gradually form an inherent concept. It turns out that using these strange tricks can bring huge wealth, and using the same labor can exert greater productivity.

Once this concept is formed, then this huge thinking inertia will become a continuous driving force for technological innovation.

Some people in the Tang Dynasty were smart people, and even... some people had an abnormal IQ, but these people spent their whole lives exploring the meaning of the classics and principles. So what is the meaning of such intelligence?

Of course, Chen Zhengtai did not say that the study of rituals is completely bad. This is the level of humanistic spirit. Without these, how to unite people's hearts, how to distinguish Hu Han, and how to make the spirit last forever?

But the problem is that everyone cannot study it, everyone is tormented, and everyone is a Neo-Confucianist and philosopher.

Such people produce too much, which is not a good thing.
To be continued...