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After returning from the workshop, Yang He gave Xu Guangqi tea, which can be regarded as an official apprenticeship.

Immediately, Sun Yuanhua hurriedly said: "When the time comes, quickly talk to Brother Wei, how to launch without ignition?" ”

Yang He smiled: "Brother Chuyang, do you know how the mine is detonated? ”

"You know, the mine is equipped with a drum ignition device, as long as you step on the pressure plate or trip the rope, it will trigger the trigger, trigger the steel wheel to rotate and hit the flint, igniting the gunpowder inside, thus detonating the mine." Sun Yuanhua said.

"Hehe, I didn't use anyone to light the fire." Yang He said with a smile.

Sun Yuanhua was stunned when he heard this, and then thought silently.

After a while, Sun Yuanhua said: "You mean to install the steel wheel ignition device on the artillery and the gun?" However, the steel wheel firing device is finely constructed, and the cannon will produce a huge earthquake when the cannon is fired, and I am afraid that after firing a shot, the firing device will not be usable. ”

Yang He shook his head and smiled: "I didn't say that the steel wheel fire is placed on the artillery, I just remind you that since mines can be detonated without ignition, then artillery and firecrackers also do not need to be ignited." ”

"When the time comes, don't sell it, tell your thoughts, and want to hear it as a teacher." Xu Guangqi said with a smile.

Yang He shook his head and smiled: "Sir, Brother Chuyang, may I ask how we usually light the fire?" ”

"Hit the flint with a fire sickle and light the velvet." Sun Yuanhua said.

Yang He smiled and continued: "The fire of the steel wheel is actually to use the steel wheel to hit the flint to ignite the gunpowder, Brother Chu Yang, you can think about the structure of the steel wheel fire, how is the steel wheel controlled?" ”

Sun Yuanhua couldn't help but ponder again when he heard this.

Sun Yuanhua pondered. Yang He smiled and said to Xu Guangqi: "Sir, it's not that I don't tell you, I think it's better to figure out some things yourself." ”

"Are you taking the test to be a teacher?" Xu Guangqi said with a smile.

Yang He shook his head. Secretly pointed at Sun Yuanhua.

Xu Guangqi smiled and nodded.

Sun Yuanhua completely turned a deaf ear to Yang He and Xu Guangqi's words, and just thought hard.

After a long time, Sun Yuanhua suddenly said: "At the right time, I seem to have some clues." The firing of the steel drum is actually controlled by a pressure spring, whether you step on the pressure plate or pull the tripwire, the pressure spring will bounce off. Thus driving the steel drum to rotate. ”

Yang He said with a smile: "That's right, it's the pressure spring that controls the steel wheel, but it's not enough." You also have to think about how that compression spring is controlled. ”

"Isn't it stuck on the platen?" Sun Yuanhua wondered.

Yang He smiled: "As long as you understand how the circlip bounces open, you can develop how to use the cannon and the gun without ignition." ”

Sun Yuanhua shook his head and smiled bitterly: "When the time comes, you don't have to be embarrassed for me." This is a moment and a half. Where did I come up with it? ”

Yang He smiled and said, "Okay, then I'll tell you directly." ”

As he spoke, he picked up the pen on Xu Guangqi's desk and drew a structural diagram on the paper.

Yang He did not draw the structure of the revolving musket, but the structure of the fire-type musket.

At the beginning, Yang He thought of replacing manual ignition with steel wheel ignition, and whenever he had leisure, he pondered this kind of ignition device.

At first, Yang He thought of directly turning the steel wheel by hand and rubbing it with the flint to ignite the gunpowder, which is the same as the principle of the flint lighter, and it is very simple to manufacture. Just fix the flint and the runner to the powder trough.

However, Yang He immediately vetoed this ignition method.

Because the gun is heavy, if you free up one hand to turn the steel wheel. Then it is difficult to stabilize the gun with one hand, and in addition, the safety is too poor, and it is easy to burn the hand after the gunpowder is ignited by turning the steel wheel by hand.

So Yang He thought of impact ignition, that is, the starting gun.

Although Yang He did not know much about the structure of the sui firing pistol, he understood the structure of the guns of later generations, and the guns used in later generations were actually evolved from the sui firing pistol, and they were all impact shots.

According to the structure of the rifle in later generations, Yang He quickly figured out what was going on with the structure of the rifle.

From the perspective of production process, impact ignition may be more complicated than runner ignition, but impact ignition is easy to use, good stability and high safety. The most important thing is that future rifles are all percussive shots, which is a correct direction of development.

Xu Guangqi and Sun Yuanhua can be called weapons experts in this era, and when they look at the structural diagram drawn by Yang He, they immediately understand what is going on.

The two of them watched and praised in unison.

After admiring for a while, Sun Yuanhua suddenly said: "There is no problem with this device being installed on the gun, but how can it be fired when it is installed on the artillery?" Too close to the artillery, people can easily get into trouble. ”

Yang He smiled and said, "Pull the trigger with a rope." ”

"Ahh Yes, yes, I'm so stupid. Sun Yuanhua patted his head and said.

"Hehe, Brother Chuyang, you just haven't thought about it yet." Yang He said with a smile.

After laughing for a while, Yang He continued: "Brother Chuyang, with this ignition device, and all the artillery uses sub-guns, how much do you think the rate of fire can be increased?" ”

"The rate of fire can be increased by at least three times." Sun Yuanhua said without hesitation.

Yang He nodded: "If you improve it again, the speed can be even faster." ”

Sun Yuanhua nodded: "If this ignition device is used, Zi Gong can indeed be improved a little more." ”

"Chuyang, if this kind of artillery is developed, my Ming Dynasty will defeat Jianyu just around the corner." Xu Guangqi said.

Sun Yuanhua nodded solemnly.

"Brother Chuyang, I don't have the energy to focus on weapon production now, I'll hand over the weapon production to you, what you want, I'll give you what you want, how much money you want, I'll give you as much as you want." Yang He said.

"Brother Xian, rest assured, Sun will live up to his mission." Sun Yuanhua said.

After a pause, Sun Yuanhua continued: "When the time comes, I will settle the affairs here first, and I will pass in a few days." ”

Yang He nodded, knowing that Sun Yuanhua had an official position, it was not that he could leave, and in addition, Sun Yuanhua wanted to bring the craftsmen here, so he naturally had to discuss it with these craftsmen.

I looked up at the sky. Yang He looked at Xu Guangqi and said, "Sir, is there no problem with sweet potatoes?" ”

Xu Guangqi smiled and said, "How many people did you bring with you this time?" ”

"The students came alone." Yang He said.

"Alone? Don't have a few farmers with you? Xu Guangqi said.

Yang He was stunned when he heard this: "What are you doing with a farmer?" You give me the seeds. Then tell me how to plant, and I'll tell the farmers. ”

"Confused, do you think you can learn this in a few words?" Xu Guangqi said with a smile.

"Is it troublesome to grow sweet potatoes?" Yang Heqi said.

Xu Guangqi smiled: "It's not troublesome, as long as you learn how to cultivate sweet potato seedlings, and then know when the sweet potato seedlings are ripe, as for sowing is very simple, as long as you master the spacing of sweet potatoes and how much manure is applied." It's not very difficult either. ”

After listening to Xu Guangqi's story, Yang He suddenly felt that his head was big, and hurriedly said, "Sir." You might as well arrange for someone who can grow sweet potatoes to come back with me. ”

"Hahaha." Xu Guangqi laughed when he heard this.

After laughing for a while, Xu Guangqi summoned a soldier to give a few words, and the soldier took the order and left.

"Okay, the teacher has already arranged it for you." Xu Guangqi said with a smile.

"Thank you, sir." Yang He said busily.

I thought about it. Yang He continued: "Sir." Supposedly, students should be taught by Mr., but there are too many things to do with students......"

Xu Guangqi waved his hand and stopped Yang He's words: "At the right time, the teacher understands that you have a job and can't study by the teacher's side, there are a few books here for the teacher, if you have time." Take a first read. ”

As he spoke, he turned around and took out a few books from the bookshelf behind him and handed them to Yang He.

Yang He took it and saw that the cover of the book was written with the words "Xu's Words". Several of the books are simply bound and handwritten, not printed.

Yang He was taken aback: "Sir, this book is the original manuscript?" ”

Xu Guangqi smiled: "It is a manuscript, and it has not yet been published. It is some of the experience of the division in the military over the years, I hope it will be helpful to you. ”

Yang He solemnly put away the book when he heard this: "Thank you, sir, this book will be kept by students as good students." ”

Xu Guangqi waved his hand: "The teacher knows that you are not studying to participate in the imperial examination, so I will not give you books such as the Four Books and the Five Classics." ”

Yang He's heart moved when he heard this, and he thought for a while: "Sir, Zhang Zhixian plans to help students donate the title of inmate, I don't know what Mr. thinks?" ”

"Donating to prison?" Xu Guangqi was stunned when he heard this.

"If possible, donate another scholar." Yang He continued.

Xu Guangqi pondered for a while, and nodded lightly: "It's okay, if you have the identity of a scholar in the middle school, you can be regarded as a civil official, and many things will be easier to do in the future." ”

"Thank you, sir, for your understanding." Yang He bowed and bowed.

Xu Guangqi smiled when he saw it: "It's quite like that." ”

waved his hand and said, "Okay, I'll find someone to help you ask about this matter." ”

"I don't dare Mr. Lao to come forward." Yang He said busily.

"What? Afraid of losing your reputation as a teacher? Xu Guangqi said with a smile.

Shaking his head, Xu Guangqi smiled and said: "Being a teacher is to recommend you to a friend, if you can get his approval, I'm afraid you don't need to donate this nominal Zhongshu scholar." ”

"Oh? I wonder who this friend of the gentleman is? Yang He asked.

"Have you ever heard of Yuan Keli?" Xu Guangqi asked with a smile.

"I heard Zhang Zhixian talk about it. Master Yuan is not afraid of power, he is actually a minister of the country, and the students are very respectful. Yang He said busily.

Xu Guangqi said with a smile: "This friend is Yuan Keli. ”

Yang He pondered for a while and said, "Sir, it's okay to tell Lord Yuan about such a thing as a student donating to prisons?" ”

Xu Guangqi shook his head and smiled: "You don't think Yuan Gong is a pedantic person, right? ”

"No, the student heard Zhang Zhixian say some things that Master Yuan did, and the student knows that Lord Yuan is by no means a pedantic person." Yang He said busily.

"Since you know that Yuan Gong is not a pedantic person, what are you worried about?" Xu Guangqi said with a smile.

Yang He smiled and said, "After all, such a thing as donating to prison is not a glorious thing. ”

Xu Guangqi waved his hand: "You donate to prison to do things, why do you care so much?" ”

"Sir, that's what you learned." Yang He said busily. (To be continued......)