The cannon has been polished, the barrel of the cannon more than five feet long has been added with several thick iron hoops, the head is poked into the muzzle with Madu, and the inner chamber is rubbed with his hands, which is relatively smooth, and the inner chamber is not distorted, and it is not easy to polish it like this.

Lao Zhu and the three of them surrounded the cannon and touched the cold cannon body, "Such a big guy must be much more powerful than the gun." "No matter how powerful it is, the appearance of the artillery is still good, and it looks very powerful

Ask the soldiers, who are familiar with the gunpowder, to load the weighed gunpowder into the barrel, and Madu to fill in the amount of gunpowder and the angle of the cannon body on the pre-drawn form.

No one has ever operated such a large firearm yet, and how to use it can only be slowly explored in practice, for example, the charge is a very worthy research topic.

After the gunpowder was loaded, the iron bullets wrapped in fine linen cloth were stuffed into the barrel, and the reason why they were wrapped in linen cloth was that the iron bullets were slightly smaller.

With the current production process, even the same clay molds used to produce artillery caliber are slightly deviated, and after different degrees of polishing, this deviation will be even greater.

It was impossible to produce one type of projectile specifically for one artillery, so the iron bullet was made slightly smaller than the caliber from the beginning, and in order not to waste the power of the medicine and affect the range, wrapping the projectile in linen cloth could have a sealing effect.

As for why you don't use stone bullets instead of iron bullets, it's because iron bullets are simple to make, and the molten iron is poured into the iron mold, and the iron eggs produced are smooth and round, unlike stone bullets, which have to be carved by craftsmen a little bit, and the size is not uniform, anyway, Lao Zhu has iron.

Insert the fuse into the artillery, even if the cannon is loaded, watching Lao Zhu dangling around on the side of the medicine twist with a torch, Ma Du really wants to run away, who knows if it will explode.

Lao Zhu asked with a smile: "How far does Tiande think this artillery can hit?" ”

Xu Da thought for a moment and stretched out five fingers, "My subordinates think that five hundred steps is enough." "Five hundred steps is about seven hundred and fifty meters, which is definitely more than the range of all weapons now.

Lao Zhu looked at Ma Du again, "How far does Xuan Zhong think he can shoot?" ”

Madu shook his head, "I don't know, it's hard to say." Why don't you try igniting a fire? Seeing Lao Zhu taking the torch to light the medicine twist, Ma Du hurriedly stopped, "The first time you test the gun, don't blow it up, it's not good if you hurt you." The prince should let someone else light the fire, which trench will we go to. ”

According to Ma Du's instructions, Jiao Yu built a small trench in advance, the lower half was below the ground, the upper half was made of bricks, and there were observation holes above the ground, so that people could take refuge during the test of the gun.

"Let go of the firecrackers, light the medicine twist and run quickly." Madu gave the guard an order, and ran into the trench to find a corner and squatted down to block his ears.

Lao Zhu, who came in later, immediately released a contemptuous gaze at Ma Du, "It's a shame that you made this thing out, and you were scared like this bear!" With that, he leaned over to the observation port.

Seeing that everyone else was standing one by one, Ma Du couldn't squat on the ground anymore and pretend to be cowardly, so he had to stand up and find an observation hole to look out.

The guards trembled and lit the medicine twist, but they didn't leave, I don't know if they were scared or deliberately pretended to be forced in front of Lao Zhu.

Then there was a loud bang, deafening, a ball of fire erupted from the muzzle of the cannon, and something fell dozens of paces away with green smoke.

"It's only so far?" Lao Zhu was puzzled.

"That's sackcloth, look over there!" Before Xu Da finished speaking, he heard a bang in the distance, and saw a puff of smoke and dust rising from a small hill two miles away.

"Haha...... That's about 600 steps. Lao Zhu laughed and rushed out of the trench, looking excitedly at the hill in the distance.

The rocks kept falling down the mountain, more and more, and even began to slide, and the smoke and dust were flying, and when the stones were no longer dropped, it was already like being slashed obliquely, making the originally gentle mountain a little sharp.

Lao Zhu continued to laugh, "Haha...... What a artifact! ”

Ma Du said: "The hill slipped because the weathering was too serious, and it had little to do with the power of the artillery. ”

Lao Zhu was very dissatisfied with Ma Du's words to destroy his own prestige, "It doesn't collapse sooner or later, how can it collapse when it hits a cannon, in the final analysis, it's because of the cannon." ”

"That's it, that's it!" Xu Da also echoed on the side, "Otherwise, this mountain can block and fight farther." This cannon has eroded for miles, and it is really unstoppable! ”

Madu didn't refute it, you can lie to yourself, if you can't collapse the city wall when the time comes, don't look for me.

This kind of iron bullet seems to be powerful, but in fact, it is difficult to cause a large number of casualties, after all, the killing surface is too small, but it can disrupt the enemy's formation, and at the same time cause shock to the enemy's heart and disintegrate the enemy's will.

Ma Du stepped forward to check the cannon body, and found no cracks, there were iron hoops to bind it, and the ordinary explosion would not cause much harm.

Lao Zhu stretched out his hand and touched the cannon body, and said with a smile: "It's still hot, it's much more powerful than I imagined." Then he said to Madu: "A few more shots!" ”

Ma Du asked Jiao Yu to take the scattered bomb again, it was a small iron bucket, as thick as the muzzle of the gun, and it was filled with iron balls the size of egg yolks, and the lid was removed and stuffed into the barrel.

The reason why it is packed in tin barrels is to reduce the damage of the projectile to the inner chamber of the gun, and the other is to increase the firing range.

With the experience just now, Lao Zhu didn't go back to the trench to hide, he had to watch it in person, and Ma Du had no choice but to accompany him, and the cannon was aimed at a small piece of wood not far away

Boom, there was another loud bang, and the small iron bucket flew out of the barrel, and then the small iron bullet also sprayed out from the barrel mouth, the speed was even more rapid, dense, looking at the past from a distance, as if a flock of birds returning to the forest, but the movement of this group of birds was really bigger.

Whoa...... Like a violent wind and rain, suddenly a leaf fell and the branches fell, and the few big trees that were originally lush immediately thinned out a lot.

Xu Da stroked his palm and smiled: "It's really good, the kind of big iron bullet just now can be used to attack the fortification, and this kind of one can kill the enemy." With this artifact, it is enough for Zhang Shicheng to drink a pot. "In the end, it is a famous general, and you don't need to know how to use it.

Lao Zhu twisted his beard with a smile, "This thing is just a big mouthpiece, I can't even think of it, it's still heavy!" Lao Zhu smiled and patted Ma Du's shoulder.

was ridiculed by Lao Zhu every day, and it was really a little uncomfortable to be praised by him so much, "Thanks to the prince Hongfu can cast this cannon, and there is also the contribution of Zhao Shumi and Jiao, and the subordinates are only a little bit of work, so they don't deserve to be praised by the prince like this." ”

Liu Ji hurriedly twisted his head to the side, he could shoot the sycophants so disgusting and explicit, even if he worshiped a famous teacher like Song Lian, he could not be regarded as a real Confucian disciple.

Lao Zhu was very happy, "How much does this iron cannon cost?" ”

Where did Ma Du know this, looking at Jiao Yu, he immediately came up, he was ready to take out the account book from his arms and show it to Lao Zhu.

"Such a big guy, that's all you spend?"

Jiao Yu replied: "Back to the prince, this is thanks to Ma Jianzheng, from the very beginning, I thought of using iron to cast cannons, if it is replaced with copper, I am afraid it will be more than a hundred times." "Just now, Ma Du mentioned him to show his merits, and at this moment, Jiao Yu immediately reciprocated.

"Since this is the case, then cast five hundred doors for this king first!"