After Li Yan left the blacksmith workshop, he went to the nearby cannon foundry.

The current cannon casting workshop is still just an empty courtyard, and a furnace is being built, as well as a high platform for casting cannons. Now there is still some time before the casting of the mold, and they don't need to be in a hurry. Moreover, Li Yan has not yet decided how big a cannon he wants to build, and the most important thing is that the parameters he knows are just dictated by Master Niu, and he has no confidence in success.

However, the barrel used to fire the flowering shell has already been set, as long as the time comes, just make a mud fan. And this barrel does not need to use bronze, just cast iron. Because it uses less gunpowder and the projectile is light, the chamber pressure will not be too large, and the cast iron can meet the requirements.

"Master Mu," Li Yan found the old coppersmith and asked, "How are you preparing?" ”

Master Mu said with some embarrassment: "The villain doesn't know very well. It is prepared according to the description on "Heavenly Creation" given by Childe, as for whether it can be used, I don't know. ”

Li Yan said with a wry smile: "That's no way, none of us have ever made artillery, and we can only be blind people riding blind horses, and one step at a time." ”

Master Mu also smiled helplessly, not knowing what to say.

Li Yan asked again: "Then you should be able to make the clay fan of the tiger squat cannon, right?" ”

"Don't worry," Master Mu said confidently: "It is a simple cannon barrel, which is as delicate as a copper tripod, and I can make an incense burner." ”

"That's good, then please." Li Yan arched his hand and said.

Master Mu replied: "Childe is polite, we will naturally work hard to do a good job." ”

Li Yan said goodbye to Master Mu and went to the gunpowder shop again. He was still very concerned about the formula of gunpowder, and if the power of gunpowder was almost fixed, he would be able to start testing the gunpowder. Not only will the reloading time be greatly reduced, but the guns will also be shot much more accurately.

Although accuracy does not seem to make much sense for solid bullets at this stage, accuracy is very useful for flowering bullets. If you can accurately hit the enemy's non-armor-piercing archer troops, the lethality will naturally be greater, and the blow to the enemy will be heavy enough.

After Li Yan went to the gunpowder workshop, he learned that Wang Renli and the three of them had gone to the cannon test site. So he rode over again to see if the three of them had any new experiments.

After coming to the test site, Li Yan saw Wang Renli and the others gathering together, looking at the things on the ground and discussing something.

Li Yan stood in the distance, waiting for the people at the test site to send someone over to report first. After all, Wang Renli and the three of them made gunpowder, and if they rushed over, they might be in danger.

After Wang Renli and the three of them got the report, they all hurried to Li Yan and arched their hands: "I have seen the general in my humble position." ”

Li Yan waved his hand and said, "No need to be polite." What are you guys doing here? ”

Wang Renli replied: "General Yu, we are making a new flowering bomb. ”

"New flowering bombs?" Li Yan asked suspiciously: "Is there a problem with the original?" ”

Ma Chaodong nodded and said, "It turned out to be the prototype of a fireworks bomb, which is a ball with a raised pattern. This style has no problem firing vertically, but when the barrel is tilted, it will have problems firing. The test we just did some time ago will have a much shorter range. ”

Li Yan frowned and thought for a while, and said, "Is it that the shell will collide with the barrel back and forth?" ”

"That's the problem we just discovered. How did Childe know? Wang Renhui asked in surprise.

Li Yan said while gesturing: "It should be that the bulge of the cannonball is too small, so that the cannonball can't be close to the bottom of the cannonball, so that the force formed by the cannonball when it is fired and the cannonball barrel will have an angle, so that the cannonball and the cannonball will hit each other." ”

Wang Renli nodded and said, "That's right, it's really vivid." ”

Li Yan smiled slightly and said, "You can make the bulge below as big as the diameter of the cannonball, so that the cannonball has no room to move back and forth, so that the problem can be solved." ”

Wang Renhui said: "We did the same, but after launching, it seems that the shells will turn over and the direction is difficult to grasp." ”

Li Yan touched the stubble on his upper lip and thought for a while, and asked, "The drop point of the cannonball is much worse?" ”

Ma Chaodong replied: "I tried four just now, and the left and right ones were at most, and there was a difference of more than 30 steps at most. ”

The difference of thirty steps is too big for a flowering projectile with a lethality of only ten steps at most. He had thought of the rear wing, but what material to use? The paper one is definitely not good, and it will be destroyed as soon as it is discharged. If you use iron, the weight will increase a lot.

Li Yan said: "Think about it again and see if you can find a way." If it really doesn't work, then add three strips of cloth to the tail and find a way to spread out after the disembowelment, so that you can maintain your direction. However, this may make the range a little closer, so let's think of other ways first. ”

"yes, let's figure it out." Wang Renli and the three of them nodded and said.

Li Yan reminded: "The key is the lead, if you can basically blow it up when you land, then it can show its effect in terms of accuracy." If you bounce and roll on the ground, who knows where it will explode, then accuracy doesn't mean much. ”

Wang Renhui continued: "As long as I can know how much time it will take to land, I can control the lead wire almost completely." However, it can only control one angle, and if you fire it from another angle, the time for the shell to land will be different. ”

Li Yan said helplessly: "Then first make it explode when it hits the ground at the maximum range, and as for the shells that can be fired at other angles, they can almost hit the ground and explode, and then slowly think of a way." You need to increase the amount of ****** so that the cannonballs can hit farther. At the very least, it is necessary to reach the distance of the bow and arrow, otherwise it will not have much effect. ”

All three nodded in agreement. It's a problem they've never had before, and it's a headache for them. Just as they were testing the explosive power of gunpowder, they have recently been increasing the proportion of carbon, but the explosion has weakened.

Li Yan asked, "How is the formula of your gunpowder?" Is the most powerful proportional set? ”

Ma Chaodong replied: "At present, there is a kind, seven and a half saltpeter, twelve and a half sulfur, and twelve and a half of toner, and this ratio is the most powerful at present. We've been trying to do it lately, and it's all been much less powerful. ”

Li Yan instructed: "Well, then let's settle on this first." Start mass production of this gunpowder, pay attention to safety, so as not to have accidents. Keep experimenting, try in the right direction, and don't waste time in the wrong direction. It's a good idea to think about what the reason for this is happening. ”

"The lowly duty is written." The three of them responded with fists clenched. Although their work is dangerous and tedious, they will have some fun doing it for a long time.