The drilling machine consists of four-foot-long wooden poles and four-foot-long iron drilling rods. A small piece of metal drilling knife is hung on the drilling rod, and the whole is placed on the drilling machine, which is 100 meters long.

There are four oblique dents evenly arranged on the thick log pole, which looks like it has been carefully measured and stuck on the wooden card with the same convex marks in the middle of the drilling machine. Push the wooden pole through the wooden card. The drill stick will rotate evenly due to the wooden card and its own shape, driving the drill knife on the iron drill pole to carve a rifle on the inner wall of the fixed gun barrel.

Chen Mu was surprised. It was not surprising that he had this thing, and it was not surprising that he had rifled in half a day, but... he knew the tools of his craftsmen. They had rules, rules, calipers and other conventional objects, charcoal pens, and other crafts.

But is this diamond machine made by craftsmen of this era?

If this drilling machine was made by Guan Yuangu, Chen Mu might not have been so surprised. After all, the old craftsman has been immersed in this skill for the rest of his life. Although it is a bit strange, it is still within an acceptable range.

But Guan Zunban was too young, and Chen Mu could only summarize all this as his momentary thoughts.

"How did the dick do this dent?

The old craftsman Guan Yuangu was not very clear. After looking at it, he said in confusion: "This is used. I used a diagonal folding and scribing on a wooden stick, right? The old man didn't know it, so he had to ask the second child."

"Don't ask for it now, let him recover from his injuries." Chen Mu is basically disappointed with the drill rifle now. The effect is not that great, and it also affects the loading speed. Why is it going to take time? But when he saw the drill machine having a new idea, he pointed to the wooden bed and asked, "Jian Guan, do you think it will be faster to replace the iron rod with a drill bit and fix the gun barrel to drill the bore?"

This is Chen Mu's first idea when he saw the drilling machine. He was just a fucking rifle. If he had this thing, he should use it to drill the rifle!

A sophisticated craftsman like Guan Yuangu can drill a gun barrel in a month. This efficiency is actually very high, but it is difficult to achieve standardization by manual labor. An excellent craftsman may form a relatively rough standard between twelve gun barrels a year.

But it is impossible for ten outstanding craftsmen to drill out 120 gun barrels a year to achieve standardization.

"Drilling the chamber?"

The old craftsman Guan Yuangu was stunned for a moment, and was previously angry. At this time, Chen Mu said that, he immediately stepped forward and pushed and pulled the drill wood for a few times. His sad expression gradually decreased, and he turned to move here and there.

Full of interest.

Chen Mu waited for a while before seeing Guan Yuangu stand up satisfied, patted his dry and cracked palms and smiled: "The second brother has really made a good thing. With this, ten days can drill out the gun barrel in at most ten days. Even if it is polished, fifteen days will be enough."

The efficiency could be improved, Chen Mu nodded with satisfaction, and then raised the question he cared about the most, "Guan Jiang, if you use this, can all gun barrels be as wide as possible, dissolve the same lead balls, and put the same gunpowder?"

standardization.

"This won't work."

The old man waved his hand directly, shook the drill stick up and down with his hand and said, "The second child made it rough, with only one wooden stick, and the wooden pole was unstable. It would be two or three points different when it was swayed up and down to drill on the gun."

However, after saying that, Guan Yuangu looked up and saw the disappointment in Chen Mu's eyes, and hurriedly continued: "But if the old man was asked to process for another two days, he should be able to make a gun bed within one part. Please see the main flag, replace the wooden card with the iron card, and add an iron card to the drill stick in front, and the two places will be fixed without shaking up and down; cast an iron mold at the place where the gun barrel is fired, and the new gun barrel shape is determined by the main flag, with the front and the back thick, and the six edges fixed."

Guan Yuangu became more and more excited as he spoke. Regardless of whether Chen Mu could understand it, he kept expressing the wonderful ideas that belonged to the craftsman in his heart. After that, he realized himself and said with a cautious apology: "Don't be surprised, the old man has become old, so he has said too much."

"It's okay, Chen probably understands what you mean. The outer wall of the gun barrel is made of a hexagonal shape, which is easier to fix in the iron mold. However, the iron will cost a little more. Guan Jiang calculated how much iron should a gun barrel be used?"

"Fifteen kilograms of iron and five kilograms of wood, you can't use Qingyuan's iron. Qingyuan's yellow iron cannot be used and can't be made into a gun barrel. The white iron can be barely tried, but it's not enough to burn it with charcoal. The coal cakes are not good, and it's more expensive. It's better to buy Fujian iron directly and take it back and fire the gun."

"Twenty pounds!"

Chen Mu said in surprise, didn’t he say that he would make 40 kilograms into 8 kilograms? Did he hear that he was wrong from Bai Yuanjie? Chen Mu asked, “Fifteen kilograms of iron can be made well?”

"It's enough, and the old man even has the spare. However, in this way, although it is not easy to explode and lasts for a long time, the gun must sink two or three kilograms." Guan Yuangu said to Chen Mu: "How do you think the general flag will choose?"

This is really a big problem of choice. The objects on the bird gunner are not light at all, and it is inconvenient to carry a bird gun of seven or eight kilograms. Now that the bird gun is sinking by another three kilograms, it is safer, but it also greatly tests the physical strength of the gunner.

"What if the gun barrel is one foot short?"

The bird guns of this era are all four feet long, but the gun barrel repair system is difficult to form a standard. Some guns are far away and some are close. But in general, fifty or sixty steps can hurt the armorless enemy. Compared with this, the maximum range of 200 steps does not seem to be important.

"A foot shorter, um, the general flag, this little old man is not sure."

Guan Yuangu seemed to be worried that he would not attract Chen Mu's joy to make a finished product, and said, "If the general secretary ordered, the old man would make a three-foot gun with six points of the gun's eye. If it was feasible, it would be customized. How about it?"

Chen Mu nodded, then simply took charcoal pens and wood chips at the Blacksmith's House, drew the shape he wanted, and said, "Make a three-foot short gun, and try to use flint to ignite the gunpowder. However, this one cannot be done in a year or two, and it is useless to make it impossible to make it fire. You are remembering this, don't forget to think about it!"

Chen Mu, who is used to using a flintlock gun, understood the principle of a flintlock gun when he thought about it, but the biggest difficulty of having to do it is to ensure strong strength and durable springs.

Although this is just a small problem, it is difficult to solve and has become a barrier.

After handing the wood chip to Guan Yuangu, Chen Mu got up, and just raised his head but remembered it again, and asked, "I asked you to recruit a few more craftsmen, have you found it?"

"The rice is harvested in October, and their banner officials are not allowed to be released. They have to wait for the busy farming period before listening to it." Guan Yuangu raised three fingers and said, "The three craftsmen, all of them will be home to take about thirteen or fourteen people. When they come here, by the beginning of next spring, as long as the iron can keep up, at least ten good guns will be fired for the general flag!"

"Wait until they come over. Chen has new things to try. Each bird gun is engraved with the name of the gunmaker, don't forget."
Chapter completed!