Arsenal Academy.

Lin Mu placed the three hand-cranked lathes on the table while hanging the construction drawings of the Minnie rifle on the wall.

The blacksmiths recruited by Lin Feng were just ordinary blacksmiths among the people, and they naturally didn't know how to forge firearms, so everything needed to be taught by him from scratch.

"If you want to do a good job, you must first sharpen your tools." Lin Mu pointed to the hand-cranked drilling machine, the hand-cranked milling machine, and the hand-cranked grinding machine and said: "This thing is a lathe imported from the West, which can process iron into any shape we want, and with them, the parts of the musket are not a problem." ”

The blacksmiths stared intently at the lathe on the table, they had never seen such a thing.

"Big brother, how do you use this thing?" Lin Feng stood beside Lin Mu and couldn't wait.

Lin Mu took out an iron plate, let everyone come around, he put a centimeter-thick iron plate under the drill bit, shook the rocker of the drilling machine, driven by the large gear in the outer ring, the drill bit rotated extremely fast, and after a while, the iron plate was drilled out of a regular round hole by the drill bit.

"Oh my God, there's such a thing." A blacksmith had a long mouth, and his jaw almost fell off.

Another blacksmith seemed to have seen the most precious treasure in the world, and he almost reached out and grabbed it.

Lin Feng was the closest, he swallowed his saliva with difficulty, and asked, "Big brother, can I give it a try?" ”

"Of course." Lin Mu gave up his position.

Lin Feng rubbed his hands, looking nervous, he moved the iron plate to a position, shook the rocker vigorously, and after a while, another round hole came out.

"It's so godly, big brother, there's no problem with this thing." Lin Feng touched the hand-cranked drilling machine and couldn't put it down.

Lin Mu smiled, "The following two are even more powerful than this, this milling machine can process the surface of iron and steel, and can cut planes, grooves, gear teeth, threads, etc., and this grinding machine can polish the surface, such as a smooth spherical surface." ”

While speaking, Lin Mu used the iron plate just now to demonstrate, he used a milling machine to cut a T-shaped groove on the iron plate, and then polished the edge of the iron plate into an arc on the grinding machine.

The blacksmiths were all dumbfounded, they used to rely on forging iron, but now Lin Mu opened a new door for them.

"Lin Feng, you are literate, you take this thing to see, there are skills for cutting parts using these three lathes, these days you first learn how to use it, and then try to produce musket parts." Lin Mu took out a book, this book is in the traditional Chinese version, and the name is "Lathe Technology".

"Yes, big brother." Lin Feng took the book and opened it to look at it, there were easy-to-understand pictures in it.

Showing the three kinds of lathes, Lin Mu took out another thing, "Knowing how to use the lathe is one thing, and producing parts of the same size is another, in order to be able to quickly produce muskets, you need to make parts with a small error, which requires the use of vernier calipers." ”

As he spoke, Lin Mu held up the vernier caliper, and then taught everyone how to use the vernier caliper, and the vernier caliper he took out was accurate to 0.02 mm.

In industry, 1 millimeter is equal to 100 wires, with this vernier caliper, he can control the accuracy of Mini rifle parts at about two wires, and the parts produced with this precision can fully meet the use.

After introducing the tools, Lin Mu introduced the structure of the Mini rifle, the barrel is ready-made, and now he only needs to focus on the production of the bolt part.

So in the school, he taught the blacksmiths the specific dimensions of the bolt parts, and asked them to produce different parts in groups, and finally assemble them.

In the end, he took out the structure of the broaching bed, and asked Ding Li and these carpenters to make some broaching beds, and the hook knife was directly provided by him.

In one afternoon, Lin Mu almost soaked in the military factory school, and even taught Lin Feng the formula of rifling distance.

"How? I guess I have some confidence now. Lin Mu asked Lin Feng.

Nodding, Lin Feng said, "Big brother, give me three days to try, and after three days, you can officially produce it." ”

"Yes, but your mission is heavy, and in addition to the muskets, the six-pounder and twelve-pounder field guns will have to be carried out at the same time." Lin Mu took out another book and handed it to Lin Feng, "This book is called "Diagram of Iron Molds for Casting Cannons", which has the detailed process of casting cannons with iron molds, and you assign a part of the people to be responsible for the casting of artillery. ”

Lin Feng took "Iron Cannon Casting ** Said" and hugged the two books tightly.

Lin Mu smiled, compared to the Mini rifle, the casting of artillery is relatively simple, this "Iron Mold Casting ** Said" is written by a Han prisoner named Gong Zhenlin in the contemporary 1841 Qing Dynasty, and this technology only appeared in the West after 20 years, it can be said that it was a very advanced cannon casting technology at that time.

To put it simply, the iron mold casting cannon is to first use the clay mold to make the iron mold, and then use the iron mold to cast the artillery, so that there is no need to make the clay mold every time the cannon is made, and the speed of producing the artillery is improved, as for the quality of the artillery, it is not the iron mold casting method that can be improved, and the quality of steel is required.

It gradually became dark outside the school, Lin Mu didn't linger any longer, got up and went to the courtyard of his grange.

Because of the existence of 1,000 acres of fertile land, the Wei family built the grange at that time, which was basically equivalent to a small village, and there was also a large mansion built by the Wei family in the village, and he now lives in this big mansion.

Back at the mansion, Po Zhang was bringing the food to the stone table, and when she saw Lin Mu coming back, Po Zhang said, "Young master, you came back just in time, the food is still hot?" ”

"Daddy, my uncle makes braised pork, it's so fragrant." The slave sat at the table, sticking his head out and sniffing the food on the table.

Lin Mu was also a little hungry after a busy day, he sat down at the table, pinched the slave's face and said, "Thank you uncle." ”

The slave said obediently: "Thank you, uncle." ”

Mrs. Zhang couldn't close her mouth happily, and he said, "Young master, you are too polite, Miss, this thank you is annoying to me." ”

After that, Mrs. Zhang went with a smile.

Only Lin Mu and slave were left at the dinner table, and Lin Mu took out a lollipop like magic at this time and said to the slave: "Have you missed your father these days?" ”

"Thought."

The slave was drooling, she couldn't eat enough of the White Rabbit toffee last time, and now this thing is better than the White Rabbit toffee, she thinks it must be better than the White Rabbit.

Lin Mu no longer teased the slave, gave the lollipop to the slave, and said, "Eat again after eating." ”

The slave nodded obediently and asked puzzledly, "Daddy, why do we live here?" ”

Lin Mu ate the braised pork, his expression was gloomy, the era of war and chaos was the most cruel to women and children, but now everything is unavoidable.

Touching the slave's head, he said, "Because we are hiding from the bad guys, a big castle will be built here soon, and the bad guys won't be able to get in there." ”