For this Chen cannon, Li Yao has definitely picked up a treasure, even in modern times, there are only a handful of shooters who want to hit the second shell on the first shell.

And the bulky firearm of artillery is even more difficult to operate, Li Yao believes that as long as this Chen cannon is trained well, it will definitely be more than enough for him to be an instructor of artillery shooters at that time!

After the second cannon was fired, the third shell was fired, and with the third shell fired, the city wall actually broke a big hole!

Li Yao asked, "Grandpa Craftsman Wang, didn't you say that it takes five cannons to shoot through the city wall?" ”

King Craftsman said with a smile: "The five shells I mentioned are for other shooters, and the Chen cannon is more special, and the three shells can be fired at the same position, so they can bombard the city wall!" ”

Oh, Li Yao nodded, then let's try to bombard the city gate, after all, bombarding the city gate is the most important thing, in a war, there is not so much gunpowder used to bombard the city wall!

The craftsman king nodded and said: "I know this, the city wall is bombarded only when it has to be, and even if the city wall is bombarded to open a hole, it is not easy to climb up, and it is still necessary to open the gap by bombarding the city gate, so as to facilitate the soldiers to attack!" ”

Then the craftsman king shouted, "Attack the city gate two hundred paces away!" ”

Chen Cannon immediately began to load gunpowder again, stuffing shells!

Li Yao walked over and asked, "Chen Cannon, how did you determine the landing point of the shell?" ”

Chen Dacang thought about it and said embarrassedly: "I used to like to shoot slingshots, and I feel that hitting artillery is the same as playing slingshots, so I can fight well!" ”

Li Yao smiled: "You have good talent." If you meet a gunner with poor talent, how are you going to teach him to shoot artillery? ”

Chen Dacang scratched his head and said, "Master Hou." I don't want to teach others, I can't teach this feeling! ”

Li Yao smiled and said: "Then you listen well, I'll teach you a method now, if you learn it, then you can be the master of those artillerymen!" ”

Chen Dacang hurriedly knelt down and said, "Thank you Master Hou for teaching, I must study hard!" ”

Li Yao helped Chen cannon. smiled: "I'll teach you the method at most twice, if you can learn it, just learn it." If you can't learn it, I'll teach you in the future! ”

Chen Cannon nodded hurriedly: "I know, I must study hard!" ”

When the craftsman king heard that Li Yao was going to teach Chen Dacang to fight artillery, he was also surprised. Get ready to see how Li Yao teaches!

Li Yao said: "This artillery is fired by the gunpowder inside. When the gunpowder expands when heated, it creates a huge force, and if this force is all applied to the shell, then the shell will be shot far away! ”

Chen Cannon nodded hurriedly, he can shoot far!

Li Yao said with a smile: "Our Ouyang artillery, the shells are pounded in with sticks, and in terms of tightness, it's really not good." If you can make a well-sealed shell, the same gunpowder can be pushed at least twice as far! ”

The craftsman heard it. Shocked, if it can be made to hit four miles, or even farther away, then it is simply unthinkable, if this shell is used for assassination, wouldn't it be able to take the head of the enemy from thousands of miles away?

It's just that Li Yao said again: "But the cannonball with good sealing cannonball can't be made at all with the current technology, unless the cannonball can be made into a whole, the craftsman king, you can use your imagination, if the ****** and the projectile are made into one, what should you do!" ”

The craftsman said ashamedly: "I thought about it once and I didn't dare to think about ******it once, because when I first had this idea, I thought about it in combination with the actual situation, and I knew that it was just a fantasy and an impossible thing to achieve!" ”

Li Yao smiled and said: "King Craftsman, when I didn't give you the artillery blueprints, did you dare to think that there were still such powerful weapons in the world?" ”

The craftsman king shook his head and sighed: "In this way, I still don't dare to think about it, it seems that I have to change this habit!" ”

Li Yao said: "Grandpa Craftsman, whimsical ideas are actually a very interesting thing, don't jump to conclusions about all kinds of unrealistic ideas, we must make bold assumptions, carefully verify, if there is really a little hope, we should not give up!" ”

The craftsman king nodded and said, "What Hou Ye said is very reasonable, make bold assumptions and carefully verify, this is indeed what we should do!" When I went back, I asked people to frame these words in the lobby of my Firearms Bureau, which is indeed a reminder! ”

Li Yao smiled: "Okay, then I'll start shooting!" ”

Li Yao looked at the city gate two hundred steps away, the city gate is under the city wall, if you want to shoot below, then ****** can't give enough, if you give enough, just by virtue of the elevation angle of this artillery, you will definitely have to shoot cannonballs on the city tower of the city gate.

If the elevation angle is low, then the shell will definitely shake, and the uncompacted shell will not only cause the propulsion to decrease when the gunpowder expands, but also cause deviation in the direction of the projectile!

Although Li Yao has not used the formula for a long time, he still remembers the formula of the quadratic function, the force generated by the gunpowder and the direction given during the movement, plus the target distance, these known conditions, it is easy to calculate the elevation angle of the gun. Two hundred steps is not considered a long-range shot, and the air resistance and the force when the shell rotates can be ignored.

Li Yao was holding a small wooden stick and making a gesture on the ground, and the craftsman king watched Li Yao draw talismans there, and thought that Li Yao was performing some kind of forbidden technique to ensure that the cannonballs that would wait for the meeting could hit the city gate!

Li Yao calculated for a while, and finally came to the conclusion that although Li Yao could not guarantee that the result was completely accurate, it could also be eight or nine without leaving ten.

Li Yao asked the workers to adjust the elevation angle of this cannon, and when Li Yao saw that it was almost at this angle, Li Yao shouted: "Okay, that's it, you all stand back!" ”

The workers all retreated to a safe distance, Li Yao took a torch and lit the fuse, and quickly ran to the safe range!

The 'bang' cannonball flew out and smashed hard at the city gate two hundred paces away!

The craftsman king was surprised: "Master Hou, your forbidden technique is really powerful!" Hit the target in one fell swoop! ”

When Li Yao heard this, he was puzzled: "What forbidden technique?" ”

The craftsman pointed to the image of the quadratic function drawn by Li Yao.

Li Yao smiled: "Oh, I'm using a scientific method to calculate the landing point of the shell, let me tell you, you come and listen!" ”

As soon as the craftsman king heard that Li Yao was going to impart knowledge, he immediately shouted: "Except for Chen Cannon, everyone is on guard a hundred steps away!" ”

Attendants, the workers hurriedly ran away when they heard the order of the craftsman king, and there were only three people left on the field: Li Yao, the craftsman king, and Chen Dacang!

The craftsman king said: "Master Hou, you can say it now!" ”

Seeing that the craftsman king was so cautious, Li Yao smiled and said, "Actually, you don't need to call them away, in fact, you may not be able to understand what I said!" ”

The craftsman king smiled: "We are our own family, even if we don't understand, we can't let outsiders listen to it!" ”

Li Yao shrugged, Okay, then let me tell you the principle of the artillery I fired just now!

(To be continued.) )