"Prince, what are you doing?" Wang Dayuan looked helplessly at another ship under his command being dragged into the dock and began to transform.

"Putting cannons, you haven't seen what the power of cannons are?" Zhao Weiji looked contemptuous of Wang Dayuan's ignorance.

In fact, the moment Zhao Weiji made the Mauser rifle, the birth of the cannon was not too far away. In the process of human history, artillery was actually more popular than muskets, because the power of artillery was too amazing.

However, with the Mauser rifle at the bottom, when the cannon was drawn out by Zhao Weiji, the people in Xinhua City were no longer so surprised, even though the cannons created a huge deep pit on the plain a few miles away.

But at that time, everyone regarded artillery as a weapon to attack and defend the city, but no one expected that when the first batch of artillery was cast, Zhao Weiji loaded them onto the ship.

"Prince, why are you installing cannons on the ship?" Since only the ships under Zhao Weiji can pass through the route of Xinhua City Central Plains, there have been no pirates, so Wang Dayuan really didn't understand what the function of installing cannons on the ship was.

Instead of loading cannons, it is better to save some space to carry some people or goods between Central Plains and Xinhua City.

"Put your artillery? Be a pirate." Zhao Weiji answered Wang Dayuan's question with some excitement.

Being a pirate? Wang Dayuan's heart is as if tens of thousands of "divine beasts" are rushing by. What does this prince want to do? If he doesn't want to be a pirate if he doesn't want to be a good local emperor?

Moreover, he is preparing to do something special. In Wang Dayuan's impression of many years of navigation, no ship could be able to defeat him, even the strongest warship that the Song Dynasty has now.

At this moment, Wang Dayuan saw another novel thing. Several more carriages came from the city, pulling several cannons on it. However, the cannon bodies of this cannon were very strange. They were shorter than the cannons I saw before, and were not flat. The cannons had their mouths aimed at the sky.

"Prince, what's that?"

Zhao Weiji looked in the direction Wang Dayuan pointed, saw something that made Wang Dayuan feel strange, and explained: "That thing is called a mortar."

"Mortar? What's that?"

"That's another kind of artillery, I'll show you later." Afterwards, Zhao Weiji shouted to the group of people pulling mortars: "Pull it into the dock and hand it over to Lao Zhan, he knows how to install it."

After saying this, Zhao Weiji signaled Wang Dayuan to lead the horse, and then the two rode on the horse and ran towards a place south of Xinhua City.

When he got there, Wang Dayuan saw all kinds of artillery placed on an empty land, and there was a huge factory next to the land.

Then there were large and small bullet craters in the distance in front of the artillery, and ruins. From the scene in front of them, Wang Dayuan could guess that this was the cannon field used by Zhao Weiji to test the artillery.

After entering the cannon yard, Zhao Weiji asked someone to find a mortar and then filled it. After the filling, he said to Wang Dayuan: "Huanzhang, do you see that mound? There are two cars on the mound. Can you hit that car with the cannon?"

Wang Dayuan looked in the direction Zhao Weiji pointed and saw a very high mound of soil there. The mound was as high as six or seven battles. There was really a car parked there on the top of the mound, although the car was very simple.

After Wang Dayuan observed it, he found someone to test it with an ordinary cannon, but the cannon flicked his fingers to the hillside of the mound.

Wang Dayuan, who was dissatisfied, asked someone to lift the muzzle to the highest point and shoot again, but the shells were still far behind the top of the mountain.

Then Wang Dayuan, who saw that there was a point of the door, asked someone to shoot the cannon backward and conducted a test shot again. This time, the bullet point moved up a little, but still failed to hit it.

So Wang Dayuan moved backward and conducted several test shots. Each time the bounce point increased to a certain extent, but it was still a little worse.

However, this also gave Wang Dayuan confidence, so he ordered people to move backwards. However, Wang Dayuan was surprised to find that the bounce point was not only unable to increase again, but began to fall continuously, and eventually he only hit the foot of the mountain.

After seeing that he could only beat the foot of the mountain in the end, Wang Dayuan could only shake his head in disappointment, and then said to Zhao Weiji: "Prince, I can't do it."

Zhao Weiji was not surprised by this result, because the ordinary cannons produced in Xinhua City could not be so high. The elevation angle of the cannons in Xinhua City was only thirty degrees.

At this time, Zhao Weiji found the gunner he had just passed by and asked him to fire at the gun on the top of the mound with a mortar.

Wang Dayuan watched the entire shooting process from the side. He only saw the gunner aiming at the broken car with a strange gesture, and then began to adjust the muzzle of the mortar.

The muzzle of the mortar is very high from the ground, and the entire muzzle is basically aimed at the blue sky. I saw the gunner lower the muzzle slightly to the ground, but the muzzle is still basically perpendicular to the ground.

Then I saw him pulling the running rope, then a shell flew out, and the car was blown up.

This result made Wang Dayuan unable to understand why the larger cannon did not blow up the car, while the slightly smaller mortar did it.

Zhao Weiji naturally knew that Wang Dayuan's head was full of doubts at this moment, so he decided to teach Wang Dayuan a geometry lesson. So he found a wooden stick and spent two pictures on the ground.

The two pictures have roughly the same content, namely ordinary artillery and a mound, as well as mortars and a mound.

But the difference is that the artillery pair contains three cannons, which fired three different arcs from the running mouths of the three cannons, and fell to three different places halfway up the mountain.

There is only one mortar on the side of the mortar, and an arc also emerges from the muzzle, but the other end of the arc falls on the top of the mountain.

After drawing these two pictures, Zhao Weiji called Wang Dayuan over and asked, "Do you understand what these three pictures mean?"

Wang Dayuan looked carefully, then shook his head and said, "I don't understand very much."

Although Wang Dayuan couldn't understand, Zhao Weiji was not upset at all. It seemed that he already knew that such a result would be. Then he said: "Do you know what a parabola is?"

Wang Dayuan shook his head again.

This reaction was expected by Zhao Weiji, so he picked up a stone on the ground and threw it out, and then asked Wang Dayuan: "What is the trajectory of the stone?"

"The trajectory after the stone is thrown out seems to be an arc."

Hearing this answer, Zhao Weiji nodded with satisfaction, and then continued: "Anything that is thrown out in a horizontal direction will fall to the ground, but the process of falling to the ground will form an arc, which is the trajectory you saw just now, and this trajectory is called a parabola."

"Oh, this is called a parabola. So will the shells fired by artillery also have parabolas?"

Zhao Weiji nodded with greater satisfaction when Wang Dayuan was able to learn from it immediately: "Yes. Then Huanzhang looked at the two pictures just now. Can you understand what you can understand now?"

After understanding the parabola, Wang Dayuan went to look at the two pictures carefully, and then he found that the arcs that emerged from the muzzle seemed to be parabolas.

"Prince, are these lines parabolas?"

"Yes, then?"

"The prince means that the reason why the cannon cannot hit the top of the mound is because the parabola cannot reach it? Why is that?"

So Zhao Weiji began to explain to Wang Dayuan about parabolas, muzzle elevation angle, and the relationship between driving force and parabolas, etc. In short, it was a bit like giving people a geometry lesson in middle school.

After Zhao Weiji finished explaining all this, Wang Dayuan finally knew what this mortar is for. This mortar can just solve the problem of insufficient elevation angle of the artillery. Where the artillery cannot be shot, the mortar can be shot.

Moreover, not only that, Zhao Weiji also ordered people to demonstrate the ability of mortars to climb over the wall to attack targets. Wang Dayuan saw that the mortars could easily destroy the target behind the wall without destroying the wall.

After reading these, Wang Dayuan finally knew what the use of mortars was, but a new problem arose again. Since mortars are so useful, what else do you need to do with artillery?

Zhao Weiji did not answer Wang Dayuan directly about this question, but asked someone to take out two different artillery shells for Wang Dayuan to weigh it, and then Wang Dayuan understood why both runs existed.

Because the shells of mortars are much lighter than those of artillery, in this era when the weight of the shells determines their power, the power of the mortars is too different from that of the cannon.

"If the mortar shell is too heavy, it cannot be fired at all, so the artillery must exist."

"Okay, prince, but you still didn't tell me why you put all these cannons on the ship? Are you really going to be a pirate?"

"Of course, I just want to be a pirate, and it's a big pirate. The most pirate should be a man's dream. These cannons are my weapons of robbery. I'm going to fight and rob. I've read the name of that ship, and after the ship is transformed, I will change the name to Black Pearl. And I've also thought about the pseudonym when I was a pirate, so I'll call me Captain Jack in the future."

After listening to Zhao Weiji's unspeakable words, Wang Dayuan really didn't know what to say.
Chapter completed!