Li Daoxuan saw the lost white kite, and smiled secretly in his heart: I have begun to pursue precision.

It's a given!

After the birth of the firecracker, many firearms inventors have been working hard to pursue precision, from the three-eyed eye gun to the bird's gun, in fact, is an attempt to pursue accuracy, the craftsman at that time used a "longer barrel" to stabilize the direction of the bullet when it is discharged, so that it becomes accurate.

However, no matter how much the smoothbore gun pursues accuracy, it is a joke, because the inside of the barrel is smooth, and the bullet will fly out of the chamber, and no one can control this.

In order for the bullet to fly forward steadily, it must have rifling.

Rifling is not a high-precision thing, as early as 1498, the Germans have invented rifling, and now it is the second year of Chongzhen, that is, 1629, it has been more than 100 years, with the craftsmanship of the Ming Dynasty, it has been able to make rifling, but the difficulty of hand-rubbing rifling is relatively high, time-consuming and laborious, and it is difficult to mass production.

Now that the technology has allowed, Li Daoxuan doesn't need to worry about anything, just give it directly.

took out the technical information about rifling that had been prepared a long time ago, and threw it down on the white kite.

What he gave was a relatively simple "rifling" drawing, which was much easier to do than "spiral rifling", from shallow to deep.

The white kite was holding a firecracker, aiming at a bird in the sky, aiming left and right, no matter how it was aiming, it didn't go well, sighed, and fired a shot casually.

At the same time as this shot was fired, the paper that Li Daoxuan threw down also happened to float down.

The bullet hit the large paper, blasting a small hole in the center of the paper.

The white kite was taken aback: "Oh? Oops! hit the book of heaven given by Tianzun. ”

The paper fluttered and fell in front of him, and he looked at it, and what was drawn and written on the paper was a technique to improve the accuracy of the firearm, but the most critical position of the "rifling" diagram was broken through a large hole, and the cross-section of the rifling was just not visible.

"Ahhh

The white kite screamed loudly: "It's over, it's over, Tianzun gave me a way to improve the accuracy of the firebolt, but I broke it, oh my God, ahhhhh I actually broke the Book of Heaven, ahhhhh

With a pop, he fell to the ground.

A group of family members next to him hurriedly surrounded him and helped him up.

The white kite looked annoyed: "It's over, I don't know how to apologize." The art of etiquette, cross out and cross out.

Li Daoxuan laughed, reprinted a sheet, and put it down again.

Only then did the white kite perk up: "Great, there is actually a second copy of the Book of Heaven, and it turns out that the broken one is not tight." ”

He put away his frustration, spread out the huge paper, climbed up to the nearby tree, and looked down........

I didn't understand it very well!

It turns out that the white kite has only studied mathematics now, not physics and chemistry, and there are many subtle truths that are difficult to understand without learning physics.

However, it didn't matter if he couldn't understand it, he immediately ordered the "Book of Heaven" to be rolled up, and ran to the next train with a group of family members, stuffed the huge paper roll into the train car, and then "ate and eaten" to the Gao family.

The school in Gaojia Village has now become very magical.

Next to the five-story school building, many students climbed to the fifth floor and looked down through the shelves that had been set up in advance, while those on the second floor placed what they wanted to observe on the trays on the second floor......

In addition to the microscope, there are many huge experimental tools in the school, which are basically placed next to the school building, so that students can climb several floors to use them.

These huge experimental tools have greatly improved the speed of students' learning of physics and accelerated their understanding of "science".

However, the white kite is not interested in these.

He was not interested in anything that did not belong to the six arts of a gentleman.

He rushed into the school building and rushed straight to the library.

Song Yingxing and Bai Gongzi are still reading and playing in the library.

The white kite beckoned to the family behind him: "Hurry up and bring the book of heaven." ”

The huge paper unfolded in front of Song Yingxing and Bai Gongzi.

Bai Gongzi understood at a glance: "I see! I see.

In terms of physics, Bai Kite already knew that he couldn't compare to his son, but this was not "number", it was not within the scope of the six arts, he didn't care at all, he asked with a smile: "What does this book mean?" ”

Bai Gongzi pointed to the rifling and said, "This is something used to stabilize bullets!" Lead bullet is soft, and when fired, it will be slightly deformed, and the deformed part will be embedded in the rifling, so that it will not constantly slide and collide in the chamber, and when it is discharged, it will no longer fly around, just like the wheels of a train will only move along the tracks...... The bullet will also move along the rifling...... I think it should be. ”

Song Yingxing next to him also nodded: "Yes, it's obviously so." Bai Xiaoyou's physics is really good.

The white kite was overjoyed: "It means that after getting this rifling thing in the barrel, the bullet that is shot out can fly straight forward, and it can be pointed where?" ”

Song Yingxing and Bai Gongzi nodded together: "Yes!"

White Kite: "Hahaha, what is going to be done then?" ”

Song Yingxing pointed to the big piece of paper: "Didn't it say it in the Book of Heaven?" First, the barrel is burned red, and then a special broach is used to pull hard inside the red-hot barrel...... And the rifling came out. The most critical and difficult part of this step is to make the rifling force uniform and stable when pulling, and not to pull the rifling crookedly, otherwise the bullet will not be able to shoot straight out. ”

Bai Gongzi laughed: "So it's best not to pull it by hand, if you pull it purely by hand, it is easy to pull crooked, even if it looks straight to the naked eye, it is actually crooked, which we have seen many times in the microscope." ”

Song Yingxing: "So we can first make a wooden machine, like a textile machine, make a straight slide rail on it, install the broach in the slide rail, use this thing to maintain the stability of the broach, and then you can pull out a straight rifling." ”

The two guys came up with ideas together, and it didn't take a few minutes to discuss a perfect plan.

The white kite listened stupidly next to him, and he didn't understand a lot of things.

However, he did understand one thing, and that was that rifling could be done very quickly.

Bai Kite was overjoyed, reached out and patted Bai Gongzi's shoulder: "Hahahaha, your kid is pretty good now, you can already help me, hahaha, when I'm old, I'll hand over Baijiabao to you, there's no problem, right?" Hahahaha. ”

/。 Zero Point Chinese Network]/