"You can see that the same amount of *, if placed in an open place, it can burn very quickly, but it can't propel the buckshot forward even a millimeter, why is that?" Zhu Youzhen did not let the people around him guess, but openly and honestly said his intentions.

"But Your Majesty, that's because *it wasn't put in a sealed iron pipe." An official couldn't help but say.

"Why is it that the same amount of * and lead bullets can be put inside the iron pipe to push the lead bullets to break through the armor, and when placed outside, they become fireworks?" Zhu Youzhen asked rhetorically.

"It is not the * itself that propels the buckshot, but the * gas after burning. Inside the iron pipes, these gases have nowhere to escape, so they can only push the lead bullet forward. In the case of burning in an open area, the gas can escape in all directions, so it will not push the lead bullet forward. Sun Yuanhua thought for a while and immediately said his thoughts.

Zhu Youzhen glanced at him with some surprise before continuing: "My thoughts are the same as Director Sun's, I think that igniting * in an open place is called burning, but igniting * in a confined space should be called an explosion.

When you make a firebolt, you will close the back of the gun pipe with an airtight bolt, isn't it to prevent gas leakage after the explosion? Now that we know the principle of firearm shooting, it is clear that there are two things.

First of all, the amount of * is not as much as possible, but the moment the buckshot leaves the muzzle, it is best to burn just after the * is finished. Because when the buckshot leaves the muzzle, even if there is *there is left, you can't add thrust to the buckshot at this time.

Secondly, the function of the gun tube is to resist the power after the explosion, restrain the gas generated after the explosion, and push it in one direction.

Then we know very well that the inner chamber of the gun tube must be smooth, there should be no gap between the bullet and the inner chamber, and the material of the gun tube must be uniform and strong enough. ”

Sun Yuanhua suddenly froze there, he felt that something was about to come out of his mind, as if as long as he figured it out, he would be able to break through his current cognition.

A master craftsman who made the firearm couldn't help but say in a daze: "Since it is the gas that pushes the lead bullet forward, can't we install more guns by lengthening the barrel*?" ”

"But wouldn't that be easy to cause a bomb? How thick do you want to use an iron pipe as a pipe? Another official quickly vetoed his idea.

Suddenly, the technical officials of these firearms factories quarreled with the masters around them, and it was not until Sun Yuanhua came to his senses and reprimanded them a few words that they quieted down again.

After seeing these craftsmen and officials calm down, Zhu Youzhen said: "Next, you can study from two aspects, one is how to improve the material of making the gun, and the other is to calculate how many * and how many lead bullets are needed to penetrate the triple armor within 30 meters..."

After walking out of the firearms factory, Zhu Youzhen seemed to remember something, and continued to ask Sun Yuanhua beside him: "Have the literacy classes and primary school classes in the ordnance factory been established?" ”

Sun Yuanhua was stunned and immediately said: "Literacy classes and primary school classes have been established, but many craftsmen are not interested in spending time in literacy classes. After the establishment of the arsenal, wages were calculated according to working hours and workload.

They are more than happy to work two more hours and earn more money. They are also reluctant to spare two hours to attend literacy classes. They think that they are craftsmen who eat by their craft, and they don't need to know how to read.

Also, they feel embarrassed to put literacy classes together with primary school classes and with their children and nephews. ”

Zhu Youzhen was a little speechless about this, he thought for a while and said: "That's it, if you are willing to go to a literacy class, as long as you can pass the graduation exam, then you will be given a part of the subsidy." In the technician level examination, the content of the written test can be added as a plus. ”

Sun Yuanhua hesitated for a moment before replying, "Your Majesty, these craftsmen are already older than the best time for enlightenment, and even if they start learning now, they may not be able to achieve anything.

Why did His Majesty spend so much energy on them, in the opinion of the ministers, it is better to put more resources into the primary schools, among the children of these craftsmen, there are some talented people. ”

Zhu Youzhen stopped, he turned to look at Sun Yuanhua and said seriously: "Director Sun thinks where the knowledge we learn from books comes from?" ”

Sun Yuanhua reacted quickly and said: "Saints are from heaven, and ordinary people have gained from thinking. ”

Zhu Youzhen shook his head and said: "I don't think so, when Wang Yangming Gezhu was three days old, not only did he not realize the truth, but he fell seriously ill. And after it was demoted to the Dragon Field Station, it was only after it was achieved.

Therefore, I believe that knowledge comes from practice, and only practice can produce true knowledge. The sage sees the subtleties and knows the subtleties, which means that the sages have recognized the truth from practical life and formed this truth into a theory, which is knowledge.

And after we have learned the knowledge, we can use the truth we have learned to guide our actions, which can make a real difference in the world, thus verifying the correctness of the sage's theory. In the midst of this reversal, we can approach the path that the saints spoke of.

Only by summing up theories from practice and then using theories to guide practice, can we truly understand the world through this constant repetition.

These craftsmen have enough practical activities, but they are unable to refine a theory that is higher than practice, because they lack cultural knowledge.

All I have to do is to let these craftsmen take less of the path that their predecessors have proven wrong, so as to improve their ability to understand the world. The experience they have summed up will eventually become valuable knowledge for the Ming Dynasty..."

A group of scholars visited the scenery of the capital, and when they passed the street outside the drum tower, they saw a group of people gathered in front of the drum tower.

"What the hell is going on here, why don't I go in and see what happens?" A young scholar with a heavy curiosity couldn't help but ask his companions.

Several scholars immediately looked at one of them, a young man in his early 20s wearing a moon-white robe. Apparently among the group, the young scholar was the leader.

Ouyang Binyuan smiled at his companions left and right and said, "It's okay, I'll accompany Zicong to go in and have a look at the excitement and see how strange the drum tower in the capital is." ”

The flat-headed people who stretched their necks outside the drum tower naturally did not dare to stop this group of scholars. Ouyang Binyuan and the others rushed to the front of the crowd, only to find that a rope with a red cloth was blocked in front of the crowd.

"What is the purpose of this rope here, this officer?" Zicong, a young man who proposed to see the excitement, couldn't help but shout at a soap standing on the inside of the rope when he saw the rope.

When the soap saw the few scholars crowded in front of him, he immediately realized that these people were about the people who came to Kaoenke, and he immediately said with a smile: "A few masters, please look at this brand, everything will be understood, this is a card given by His Majesty." ”

Ouyang Binyuan looked up in the direction that Soap Li was pointing, and sure enough, there was a sign full of red lacquer characters.

"Evergreen pendulum, witness the mysterious power of the earth turning, a penny for a person. It's funny, Your Majesty is such a wonderful person. Well, let me wait and see how the earth turns. ”

Ouyang Binyuan said with a smile to his companion, and took out a string of money from his arms and threw it to Soap Li, who quickly untied the rope after taking the money, and invited these scholars to come in to watch Changqing swing away.

After walking into the Drum Tower, Ouyang Binyuan realized that although there were many people standing outside the Drum Tower, there were only about 10 onlookers inside.

When they walked into the drum tower, they saw three or four people running out with pale faces, as if they had seen ghosts. On the ground, there are two people kneeling and prostrating to the round table in the middle, as if entering the temple to worship the Buddha.

When Ouyang Binyuan looked at the round table in the middle of the drum tower, he was immediately shocked by this huge pendulum.

He couldn't help but want to get closer, to look better. But his companion grabbed him tightly, and he looked back inexplicably.

Zicong, who was originally the most active in watching the excitement, grabbed his right arm tightly, and said with a little straight eyes: "Brother Xianwan, isn't there a ghost attached to this pendulum, otherwise how can you draw such a delicate pattern on the sand table below?" ”

"Hugh has to talk nonsense, under this bright blue sky, and in the Shenjing, how can there be ghosts and gods." Ouyang Binyuan patted his companion's hand and comforted him.

"This is not good, maybe this big swing is used to suppress ghosts and gods, you must not get too close, beware of evil spirits. It's like the first chapter of the Water Margin, Taiwei Hong let go of the evil stars of heaven and earth. ”

A young man's slightly mocking voice came into the ears of Ouyang Binyuan and the others, Ouyang Binyuan looked up, and saw a teenager lying on the fence, looking at himself with a smile.

He was about to teach this reckless young man a lesson, and several companions behind him had already said, "Brother Xian Wan, let's go out first, it seems that this place is not suitable for a long time." ”

Before Ouyang Binyuan could answer, several companions had already scrambled out of the drum tower, much faster than when they came in.

Ouyang Binyuan was stunned for a moment, but he finally didn't leave, but walked to the fence outside the round table, and carefully observed the big swing.

Looking at Ouyang Binyuan's thoughtful look, the young man couldn't help but ask him curiously, "This benevolent brother, have you seen some doorways?" ”

Ouyang Binyuan glanced up at him and asked quietly: "Foolishness has nothing to gain, does Your Excellency have any understanding of this?" ”

The young man suddenly withdrew his gaze with some disappointment, and explained simply: "My master said that the movement of this pendulum can tell us the mystery of the movement of the earth, but I just can't figure out why the earth turns from west to east. ”

"Because the earth under our feet is revolving around the sun." A faint voice rang in the ears of the two of them.