Taichangdu has been back for a few days, and Bi Maokang and other officials from the Ministry of Works did not come to the door on their own initiative.

Because they all knew that the emperor must be tired and needed rest after fighting outside for so long.

Moreover, the emperor has left the capital for so long, and he has to spend time with his family after he comes back.

So, they have not disturbed Taichang these days.

However, after hearing that the emperor went to Wubei City and summoned a group of generals to discuss in the Wenhua Hall for a long time, they realized that the emperor should have had enough rest.

So, the next morning, after the morning court, Bi Maokang, Wang Zheng and Song Yingxing came to the imperial study together.

After the monarch and ministers met, Taichang couldn't help but ask, "How about it, Liangfu, when will those twenty new ASCH ships be completed?"

Uh, this one.

Upon hearing this, Wang Zheng couldn't help but say embarrassedly: "Your Majesty, the construction period of the twenty Aegis ships has been postponed again, but I promise that the construction will be completed by the end of this month."

In fact, he can't blame him for this.

The reason why the construction period of the ASCHS was delayed was that he had made every effort to build a large fishing boat.

Of course Taichang knew this.

He couldn't help but smile and said, "It's okay, it's okay, it's not your fault. I'm in a hurry to use a fishing boat, so it's delayed your time. I just want to ask, don't worry about these twenty ASCHS ships, as long as they can be handed over to the navy before the New Year."

Well, the emperor can understand the reason.

Wang Zheng hurriedly bowed and thanked him.

Song Yingxing then said impatiently: "Your Majesty, the steam locomotive Weichen has already built it."

ah!

All the trains were built?

When Taichang heard this, he couldn't help but say surprise: "Chang Geng, why didn't you say it earlier? Where are you? Take me to see it."

After saying that, he waited to get up and walked out.

Alas, there is a reason why I didn’t say it earlier.

Song Yingxing said awkwardly: "Your Majesty, there is still some problem with this steam locomotive."

Any questions?

It's normal!

After all, it is something new that has never appeared before, so it is normal for some problems during development.

Taichang asked calmly: "Oh, what's the problem?"

Song Yingxing said helplessly: "The biggest problem with this steam locomotive is that it cannot pull too much goods. What you said about the ten-twenty-foot carriage steam locomotive can't pull at all. At this moment, the steam locomotive can barely pull five carriages, but it's always slipping and can't run at all."

Oh, this question.

Taichang thought for a while, then estimated: "Well, the lack of power for the goods that cannot pull too much should be due to insufficient power. As for slippage, it may be because the front of the car is not heavy enough and the friction is not enough."

What is friction?

When Song Yingxing heard this, he was stunned.

He can't pull too much goods because he lacks power. He has never heard of the friction problem before!

He was stunned for a moment, and then couldn't help asking: "Master, what is the friction?"

Uh, how do you explain this?

Taichang thought for a while, then pulled out a piece of white paper, gently pressed it with his index finger, and then said to Song Yingxing: "Chang Geng, try to draw this piece of paper."

Upon hearing this, Song Yingxing stepped forward with curiosity and pinched the edge of the paper and twitched it gently.

Taichang didn't exert force, so the white paper was easily pulled away by him.

He took the blank paper and looked at it for no reason, but still didn't understand what the emperor meant.

Taichang pulled out another piece of white paper, pressed it with his index finger, and then said to Song Yingxing: "Chang Geng, try to draw this one again."

Upon hearing this, Song Yingxing reached out his hand with curiosity, pinched the edge of the paper and tweaked it gently.

This time, the white paper did not move at all because Taichang was pressing hard.

Seeing this, Song Yingxing couldn't help but look thoughtful.

Of course he would not thrust hard anymore. If he thrust hard, the white paper would be torn apart.

He also knew that the reason why he couldn't move was because the emperor tried hard.

Question, what is the reason for this?

He really couldn't figure it out at this moment.

Seeing this, Taichang explained again: "This is friction. Maybe the swaying paper is not easy to understand. You can think about it. If it is a steam piston, can you pick it up if you gently hold the connecting rod on it?"

This is definitely not something you can carry, because the surface of the connecting rod is quite smooth.

Song Yingxing subconsciously shook his head.

Taichang then asked, "If you hold the connecting rod hard, can you lift the steam piston up?"

Song Yingxing thought, "It depends on how big the steam piston it is. If it is the largest, Weichen probably won't be able to carry it, because the largest one is more than one hundred kilograms."

Uh, who asked you to carry hundreds of pounds!

Taichang couldn't help but shake his head and smiled bitterly: "I'm talking about a small one, the kind that's more than ten pounds."

Song Yingxing nodded quickly and said, "That must be no problem."

That's right.

Taichang then explained: "This is also friction. If you hold the connecting rod gently, you can't lift it up because the friction is not enough. If you hold the connecting rod hard, the friction between your palm and the connecting rod will increase, so you can lift it up. It is the same for me to hold this piece of paper hard. The reason why you can't pull it up is because the friction between my fingers and the paper will increase."

When Song Yingxing heard this, he finally understood.

He couldn't help but excitedly said, "Your Majesty, what do you mean, as long as the steam locomotive is heavier and increase the friction, it will not slip, right?"

This is probably the principle.

But I have to go to the scene to check it out.

Taichang nodded slightly, then stood up and said, "Let's go and have a look together."

This steam locomotive is definitely impossible to be developed in the imperial city, and it is even impossible to be developed in the capital.

Because the steam locomotive is to be placed on the railway tracks, and there are no railway tracks in the capital at this moment.

The place where Song Yingxing developed the steam locomotive was the coal station west of the capital.

As for why this place is called a coal station, it is because the coal transported from Fangshan to Huairou and Miyun was built here, and coal is also used in the capital, so a coal station was built here.

Although there are no steam locomotives at this moment, there are many freight carriages pulled by horses, and the rails here are also very long. There is definitely no problem in testing steam locomotives.

However, when Taichang walked out of the carriage, he frowned slightly.

It's too dirty here, and it's black everywhere.

He couldn't help asking, "Chang Geng, why don't you develop it on the east side of the capital? There are iron ingots there, which are much cleaner than here."

Song Yingxing said helplessly: "Your Majesty, not only do you pull iron ingots toward Wubei City, but you also have to pull a lot of supplies to Huairou and Miyun when you return, otherwise the miners who are mining there will be no food or daily necessities. The railway is too busy, so it is hard for Weichen to block the test drive! It's different here. Anyway, just pulling coal, and blocking the test drive is nothing."

Well, okay, just be dirty if you want to get dirty. It is just right to develop this steam locomotive as soon as possible.

Taichang nodded slightly, then followed Song Yingxing into a huge shed next to the coal station.

There is a steam locomotive and a series of freight cars parked here.

Taichang understood the appearance of the steam locomotive when he saw it. This must be because the friction was not slipping enough.

Song Yingxing may have made the entire front of the car more than 1 meter long, with only a boiler, a steam engine, and an operating table, and even a canopy!

He couldn't help but shook his head slightly, and then said lightly: "Let's open it and take a look."

Upon hearing this, Song Yingxing hurriedly ordered people to block the coal transport carriage pulled from Fangshan, and then ordered people to burn the boiler on the steam locomotive.

Not long after, the steam was ready.

He climbed up without hesitation, sat on the operating table, and quickly opened the steam valve.

The imagined train-Mercedes-Benz scene did not appear. The steam locomotive was like crazy, and it was walking and stopping, and the speed was not rising at all.

Taichang looked down at the wheel below, then raised his hand and said, "Okay, OK, Chang Geng, I've got the steam machine."

Well, this hasn't been opened yet.

Upon hearing this, Song Yingxing closed the valve awkwardly, and jumped down with a flushed face.

Taichang pointed at the steam driveway without hesitation: "The front of the car is too small, it must be at least five meters long, and iron plates must be used to cover the carriage-like thing on it, and glass is installed around it. In addition, try to make the boiler bigger and add more water inside, so that it should be heavy enough."

Upon hearing this, Song Yingxing thought about it carefully, and then asked: "Master, such a heavy steam locomotive, a steam engine may not be able to carry it, let alone pick up goods."

Taichang couldn't help but laugh and cry: "Who said that you can only install one steam engine? You can install a few more units, just like the ASUS. You can install as many units as you need, and one can drive a wheel."

yes!

This boiler is not short of steam when it is big, so it is OK to install any steam engine!

Song Yingxing nodded excitedly and said, "I understand."

Taichang looked at the horse-drawn coal carriages that were stopped outside, and then instructed: "In the future, two railways will be built together, one by one, and one by one, and don't go back and forth, and it will be too inconvenient."

yes!

We also built two railways, one to come and the other to go, which made it much more convenient.

Song Yingxing nodded again and said, "I understand, I understand."
Chapter completed!