Become a feudal king from today

"Wait a minute, my father will go with you. Read М" Wang Ying said.

Wang Chong joked: "Did dad's iron cannon not be built yet?"

"Do you think dad is as half-empty as you?" Wang Ying returned to his serious look.

He had built eighteen gray iron cannons and eighteen white iron cannons respectively that King Yan wanted, and it was time to report back to King Yan.

The father and son arrived at the palace and entered the study after announcing.

"Has the artillery been built?" Zhao Xu, who was still copying textbooks, was delighted when he heard this.

Wang Ying nodded, "As long as His Highness needs it, the Department of War can manufacture white iron cannons in large quantities at any time."

"Very good!" Zhao Xu said two words.

He did make a lot of money through the franchise.

But the franchise rights are gone once they are sold.

From now on, he can only rely on Wangfu's goods to make money.

But any product will go through a process of rapid initial sales growth and then gradually stabilization.

At this time, although the money was still coming in continuously, the income was basically stable.

If the four northern counties suddenly need large-scale expenditures, they may be stretched thin.

After all, if he wants the four northern counties to catch up with his achievements over decades or even centuries of development, he will have to spend a huge amount of resources within a period of time.

This is the same as krypton gold in the game.

The solution to this problem is to continuously introduce new goods.

Taken together, this amount is considerable.

For him, this low-end version of the artillery is also one of the goods.

"Your Highness, I have lost." Wang Ying said, and then Wang Chong said with a smile.

Zhao Xu is in a good mood today.

So, he smiled and said to Wang Chong: "I have expected it a long time ago, right?"

"How does Your Highness know?" Wang Chong asked in surprise.

Zhao Xu said to Wang Chong sincerely, "You still have a lot to learn. Once the science and technology school is built, you can come and listen to my lectures."

"Yes, Your Highness." Wang Chong's eyes lit up. He had been looking forward to the stars and the moon for this matter.

Now it's finally time to begin.

Then Zhao Xu told Wang Chong the method of making spring steel.

When Wang Chong heard this, he was dumbfounded.

"Is it that simple?" Wang Chong asked.

"Yes, it's that simple." Zhao Xu smiled.

In fact, the difference between ordinary steel and spring steel is a question of "quenching and tempering".

To put it simply, the steel is forged into steel bars, and then baked in an ordinary furnace fire. This process is called medium temperature tempering.

The tempered steel bar will show the characteristics of hard inside and soft outside and become elastic.

Not only Wang Chong, but also Wang Ying was dumbfounded.

He also didn't expect that such a simple process could produce different steel.

From this, he thought that there seemed to be a lot of knowledge in this steel.

"I am willing to admit defeat and concentrate on making the firing device from now on." Wang Chong said obediently.

Zhao Xu nodded. He originally just asked Wang Chong to get some snacks, but now his goal has been achieved.

However, in addition to material issues, the manufacture of flintlock muskets also involves the same mass production issues as artillery.

Mass production of artillery was solved through iron mold casting.

But there is no such trick as an iron mold for a flintlock gun.

The only production method is assembly line production.

After all, it would probably take a month for a craftsman to independently build a flintlock gun from start to finish.

The assembly line only needs to manufacture the accessories and finally assemble them. ‘

However, this requires coordinating the size standards of accessories.

So he said to Wang Ying: "You are here just in time. I will give you a more precise measurement standard. I will soon extend this set of weights and measures to the entire Yan County."

"Weights and measures?" Wang Ying and Wang Chong looked at each other, waiting for King Yan's next words.

Zhao Xu then explained to Wang Ying and his son what an assembly line was.

When the two heard this, they were suddenly enlightened and surprised at the same time.

They did not expect that they could mass-produce flintlock muskets through this method.

But this does require a metric.

"Meters, decimeters, centimeters, millimeters..." Zhao Xu picked up his pen and started writing on the paper.

While writing, he asked: "What measuring instruments are currently used by the military commander?"

"Rule, rule, ruler." Wang Ying said.

Zhao Xu nodded. A compass is a compass, which is used to draw circles, while a moment is used to draw right angles, and a ruler is used to draw lengths.

But these tools are not suitable for assembly lines.

He felt that it was necessary to create a new measuring tool for the Army, which was a vernier caliper.

This is a high-precision measuring tool commonly used in contemporary manual work.

It is also a tool for checking the size of workpieces.

With this, it is easy to inspect the accessories made by the craftsmen.

But it was very difficult to make an accurate ruler in ancient times.

This is also one of the reasons why assembly line production could not be realized in ancient times.

But this problem did not trouble him.

He only needs one thing and he can realize the contemporary scale in the four northern counties.

This is mercury.

Mercury is mercury, which was not hard to find in ancient times.

In order to make a mercury column, in addition to mercury, you also need a closed glass tube.

Now that Bingzhangsi has mastered the glass manufacturing process, blowing a glass tube is not a problem.

At that time, you only need to take a basin of mercury, take out the glass tube, fill it with mercury, and then put it back in the basin filled with mercury.

At this time, the mercury in the glass tube will drop and a vacuum will appear.

The distance from the ground to this vacuum is 760 mm.

The reason is that the mercury column is used to measure atmospheric pressure.

Under standard atmospheric pressure, the height of the mercury column is this value, and he also has the standard atmospheric pressure value in this area in his mind.

With this value, he can further subdivide it, allowing the craftsman to divide the ruler evenly across the naked eye, and obtain a high-precision ruler in Dasong.

Thinking of this, he explained this method to Wang Ying.

The two fell into a daze again.

But after the sluggishness came the joy. If he could get such an original ruler, Bingzhansi would be able to polish fine accessories in the future.

"You prepare the things first. I will personally participate. When the first original ruler is made, I will teach you how to make the vernier caliper." Zhao Xu said lightly.

He didn't do this before because the Bingzhan Division didn't have the use of such sophisticated things.

But it will be different from now on.

Not to mention flintlock guns, polishing drill bits and other tools also require high-precision measurement.

With these high-precision things, the next step can be to produce more precise machinery.

Otherwise it's all nonsense.

"Yes, Your Highness." The two of them responded.

With nothing else to do, the two resigned to Zhao Xu.

After leaving the study, Wang Ying and his son looked at each other and shuddered at the same time.

Now what King Yan is teaching them is really beyond their understanding.

Then they sighed at the same time, shook their heads and left, feeling ashamed of themselves.

study.

After the Wang family and his son left, Zhao Xu called Chang Wei.

He had an urgent matter that needed to be handed over to him.