The drilling machine is composed of a four-foot-long wooden rod and a four-foot-long iron drill pipe, and a small piece of metal drill cutter is hung on the drill pipe, which is placed on the drill machine as a whole.

The thick log rod is evenly distributed with four oblique indentations, which looks like it has been precisely measured, stuck on the wooden card with the same convex mark in the middle of the drilling machine, and pushes the wooden rod through the wooden card, and the drill rod will rotate evenly due to the wooden card and its own shape, drive the drill knife on the iron drill pipe, and carve rifling on the inner wall of the fixed barrel.

Chen Mu was amazed, with this thing, it was not strange to drill out of rifling in half a day, but ...... He was well aware of the tools of his craftsmen, who had regular utensils such as rules, rules, and calipers, and charcoal and the like that he carried with him.

But can this drilling machine be made by craftsmen in this era?

If this drilling machine was made by Guan Yuangu, Chen Mu might not be so surprised, after all, the old craftsman has been immersed in this skill all his life, although it is a little strange, but it is still within the acceptable range.

But Guan Zunban was too young, and Chen Mu could only summarize all this into his whimsical ideas for a while.

"How did the second child do this dent tangent?"

The old craftsman Guan Yuangu didn't know much either, so he looked at it and said in a daze: "This is used, cut with paper obliquely folded and scribed on a wooden stick, right?" The old man doesn't know, and he has to ask the second child. ”

"Don't ask, let him recuperate." Chen Mu is basically disappointed with the rifling wire now, the effect is not so great, and it also affects the reload speed, so why waste time, but he saw that this drilling machine had a new idea, pointed to the wooden bed and asked: "Guan Jiang, do you think it will be faster to replace the iron rod with a drill bit and fix the barrel drill?" ”

This is Chen Mu's first thought when he sees the drilling machine, and he also drills a fart rifling, if there is this thing, he should use it to drill the rifle!

A seasoned craftsman like Guan Yuangu can drill a gun pipe in a month, which is actually very high, but it is difficult to achieve standardization by manual work, and a good craftsman may form a rough standard between drilling twelve guns a year.

However, it is impossible to achieve standardization when ten excellent craftsmen drill 120 guns a year.

"Drill?"

The old craftsman Guan Yuan was stunned for a moment, and was annoyed before, but as soon as Chen Mu said, he immediately stepped forward to push and pull the drill wood and tried it twice, and the sad expression on his face gradually decreased, and he turned to move here and there.

Interested.

Chen Mu waited for a while, only to see Guan Yuangu get up satisfied, patted his chapped palms full of chapped and said with a smile: "The second child really made a good thing, with this, ten days, at most ten days can drill out the gun pipe, even if it is polished, fifteen days is enough." ”

The efficiency can be improved, Chen Mu bowed his head with satisfaction, and then asked the question he was most concerned about, "Guan Jiang, if you use this, can you make all the guns the same width, dissolve the same lead pellets, 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 is rough, only a wooden card, the wooden pole is unstable, and if it is shaken up and down and drilled onto the gun, there is a difference of two or three points." ”

However, Guan Yuangu looked up and saw the disappointment in Chen Mu's eyes, and hurriedly continued: "But if you let Lao Er process it for two more days, you should be able to make a bed within one point." Please look at the general flag, change the wooden card for the iron card, and then add an iron card to the drill stick in front, and the two places will not shake up and down; The iron mold is cast at the place where the gun pipe is placed, and the new gun tube shape is set according to the general flag, the front is narrow and the back is thick, and the six edges are fixed. ”

The more Guan Yuangu spoke, the more excited he became, and regardless of whether Chen Mu could understand it or not, he kept saying the whimsical ideas that belonged to the craftsman in his heart, and only then did he react to himself, and said with a cautious apology: "Don't be surprised by the general flag, the little old man is old, and there are many words." ”

"It's okay, Chen probably understands what you mean, the outer wall of the gun pipe is in the shape of a hexagonal shape, which is easier to fix in the iron mold, but this iron costs a little more, Guan Gong calculates, how much iron does it take to use a gun pipe?"

"Fifteen catties of iron, five catties of wood, you can't use Qingyuan's iron, Qingyuan yellow iron is not forbidden, and you can't make a pipe. White iron can be reluctant to try, but to use charcoal to burn again, briquettes are not good, it costs more, it is better to buy Fujian Mao Tie directly, and take it back to Xiao Lao'er to play the gun. ”

"Twenty pounds!"

Chen Mu was surprised, didn't he say that he wanted forty catties to be eight catties? Could it be that he heard it wrong from Bai Yuanjie? Chen Mu asked, "Fifteen catties of iron, can it be made?" ”

"It's enough, and the little old man even has a margin. However, in this way, although it is not easy to explode and durable, it will sink two or three catties. Guan Yuangu said to Chen Mu: "What do you think the general flag thinks will do?" ”

This is really a big problem to choose, the various objects on the hands of the bird are not light, seven or eight pounds of the bird gun is already inconvenient to carry, and now the bird gun sinks three pounds, although it is safer, but it also greatly tests the physical strength of the hand.

"What if the pipe is a foot shorter?"

In this era, the birds were all four feet long, but it was difficult to form a standard for the cultivation of the guns, some of them could hit far away, some of them could hit close, but in general, fifty or sixty steps could hurt an unarmored enemy, compared to this, the maximum range of two hundred steps did not seem to be important.

"One foot shorter, well, the general flag, this little old man can't say for sure."

Guan Yuangu seemed to be worried that the finished product would not attract Chen Muhuan, and said: "If the general command orders, Xiao Lao'er will make a three-foot gun, and the gun eye will be six points, if it is feasible, it will be customized, how about it?" ”

Chen Mu nodded, and then simply took the charcoal and wood chips in the blacksmith workshop, drew the shape he wanted, and said: "Make a three-foot short gun and take a look, and then try to use flint to ignite the gunpowder, but this can't be made in a year and a half, and it's useless to get it out if it can't be fired, your old man remembers this, don't forget to ponder!" ”

The principle of the flintlock pistol, Chen Mu, who is accustomed to arquebus, understands it when he thinks about it, but if he really wants to do it, the biggest difficulty is to ensure a powerful and durable spring.

Although this is only a small problem, it is not easy to solve and has become a pass.

Handing the wood chip to Guan Yuangu, Chen Mu got up at this time, but just raised his head but remembered it, and asked, "Let you recruit a few more craftsmen, have you found it?" ”

"The rice will be harvested in October, and their flag officials will not let people go, and they will come to listen to it after the farming is busy." Guan Yuangu raised three fingers and said: "The three craftsmen, all of them are about thirteen or fourteen people, wait for them to come, until the spring of next year, as long as the iron can keep up, at least ten good shots for the general flag!" ”

"Wait for them to come over, come here, Chen still has something new for you to try, each bird gun is engraved with the name of the craftsman, don't forget."

Chen Mu nodded with satisfaction, there were more than ten more new and more reliable bird guns in winter, which basically met his expectations, "What is the need for the second child to recuperate, ask someone to go to the yamen to find me, I just came back from the war, and there are a lot of matters under it, and when the doctor from Guangcheng comes, Chen will come to see the second child again." ”