After a battle with Hu Yanzhuo, Wang Lun realized the importance of weapons and paid more attention to the armory.

On this day, Wang Lun came to the Firearms Research Institute, and after more than a month of hard work, Ling Zhen had already taken care of this place in an orderly manner, not only built an artillery workshop, but also trained many artillery-making craftsmen, and began to supervise the manufacture of artillery.

When Wang Lun entered the Firearms Research Institute, the first cannon had just been built, and when Ling Zhen saw Wang Lun coming, he led him to take a look with great interest. When Wang Lun saw it, he was immediately petrified, and a strange cannon with a large caliber and a total length of less than one meter appeared in front of Wang Lun.

"Brother of the owner of the village, the control of the copper mine court is too strict, and the materials are insufficient, otherwise we can build more artillery." Ling Zhen thought that Wang Lun was stunned by the cannon he supervised, and he was quite complacent.

"Is this the artillery you oversaw? It's weird. The barrel of this cannon is made of bronze, so why not cast it in iron? Wang Lun asked curiously.

"Cast iron? No, the iron is too brittle, it is acceptable to be used to make ordinary weapons, but if it is used to cast artillery, it will inevitably break easily, and this method is not feasible. Tang Long, who came with Wang Lun, frowned and thought for a moment, shook his head and replied.

Hearing this, Wang Lun realized that the iron-making technology at this time was backward, and he could not make good iron. Ling Zhen said that iron brittleness must refer to pig iron, if it is smelted mature iron, there is naturally no brittleness problem, and the cannon body made of wrought iron is much stronger than the gun body cast in copper.

Although Wang Lun has the memory of his descendants, he doesn't know anything about this iron-making technology, and he can only cry out in vain at this time!

Since the first artillery in Liangshan was cast, it was natural to try the power, and Wang Lun immediately ordered someone to push the artillery mount to the test artillery field.

Wang Lun stayed behind the bunker, only to see Ling Zhen order someone to put a stone round projectile the size of a basin into the cannon from the muzzle, and then put about ten catties of black powder into the barrel of the cannon, and finally sealed it to reserve a long lead. After everyone was hidden, Ling Zhen held a torch, lit the fuse, and then quickly ran behind the bunker.

The lead 'boom' burned, and after a while, it burned into the cannon body, and then a loud 'boom' was heard, and everyone was shocked to the ears. After the tinnitus weakened a little, everyone walked out of the bunker, only to see that the cannon body was still white, and everyone walked over to look at the muzzle of the cannon, and the stone had been beaten. Wang Lun raised his eyes and saw that there was still an object in the sky, which was making a parabolic motion, from slow to fast, only to hear a muffled sound of 'bang', and the stone bullet fell to the ground.

Ling Zhen hurriedly ordered people to go to find the location of the stone bullet.

"Brother Ling, how long does it take for this kind of artillery to be fired once?" Wang Lun asked.

"For the first shot, it only takes a moment to load and seal the gunpowder, and then you need to wait until the gun body cools down to seal the gunpowder, which will take at least half an hour." Ling Zhen said.

"It's too slow, it's not as good as a stone thrower!" Hearing this, Wang Lun was speechless. At this speed, it takes half an hour to shoot a cannon, and even if you cast 500 cannons, it has no power.

"Yes, the speed of the artillery is slow, but the advantage is that the firing range is long, two stone bullets of equal weight, the stone thrower can throw up to more than two hundred steps, and the artillery can shoot four or five miles away." Ling Zhen said. (One is equal to 30 catties)

At this time, the soldiers who went to find the landing point of the stone bullet had already measured the range, and it was almost five miles. The range is long enough, but the rate of fire is really speechless.

"Brother Ling, have you ever thought of using the method of the sub-mother cannon body to solve the problem of slow firing rate of artillery?" Wang Lun pondered for a while before speaking.

"The body of the gun? I would like to hear more about it. Ling Zhen said.

Immediately, Wang Lun elaborated on the design idea of a sub-mother cannon that he had seen when he was a weapon enthusiast.

As the name suggests, the mother cannon is divided into a mother gun and a sub-gun, and the mother gun is like the body of a general artillery, but there is an open charge chamber in the back and abdomen of the gun, which can be used as a sub-gun. The sub-cannon is a hollow cylinder, which is loaded with shells and gunpowder in advance, and when fighting, a sub-cannon is loaded into the mother cannon chamber first, and the empty sub-cannon is withdrawn after firing, and then the second one is replaced, because the sub-cannon can be replaced in turn, there is no need to load gunpowder and shells separately like other artillery, and the rate of fire is naturally very high.

"This is a big second!" After listening to Wang Lun's narration, Ling Zhen couldn't help but praise in unison. The disdain in my heart has long been gone, but I have a sense of admiration.

"What the foolish brother thinks is just a rough idea, how to implement it, how to do it, the brother is good at this, and it needs to be studied in detail." Wang Lundao.

"The master of the village is like a stroke of genius, which makes the brothers suddenly open. Ling admired the owner of the village. Ling Zhen bowed.

"Haha, Brother Ling praised it falsely." Wang Lun said with a haha. But in my heart, I thought: If the original creator of the sub-mother cannon heard Ling Zhenzhi's praise, he would probably despise me greatly. But fortunately, he hasn't been born yet, which is a blessing that he doesn't have to be despised!

"Brother Ling, I don't know how you prepared this gunpowder?" Wang Lun asked.

"Gunpowder is mainly saltpeter sulfur, supplemented by charcoal. As for the specific ratio, it is about hexanitrotrisulfur and charcoal. Ling Zhen said.

"Oh, I see. The foolish brother has a little study of gunpowder, and there are some immature opinions, the brother can refer to one or two, if what he said is not right, I hope the brother will not make fun of it. Wang Lun said.

"The idea of the master's cannon can be described as exquisite, which has opened the eyes of the brothers, and there must be extraordinary insights on this gunpowder, please tell the owner of the village quickly!" Ling Zhen said.

"In this way, the foolish brother will be ugly. I thought that if we wanted to increase the power of gunpowder, we could increase the proportion of saltpeter to more than 70%, the proportion of sulfur to about 10%, and the proportion of charcoal to about 10%. In this way, the power of the gunpowder explosion can be greatly increased, and the smoke generated by the explosion can be relatively reduced. Immediately, Wang Lun said a better ratio of black powder in later generations.

"I wonder why the owner of the village would think of this kind of ratio?" Ling Zhen asked. You must know that since the Sui Dynasty, the proportion of gunpowder has been passed down to the present, and hundreds of years have passed, and the formula has not changed much.

"Uh...... Hearing ......Ling Zhenzhi's question, Wang Lun couldn't help but have a headache for a while, did he tell him that the gunpowder explosion mainly relied on the reaction of the saltpeter?

"I think the owner of the village is right, and I have studied the gunpowder carefully, and I think that the reason why the gunpowder explodes is mainly due to saltpeter, and the sulfur and charcoal play a role in combustion. If the amount of sulfur and charcoal is too low, it will be difficult to ignite, and if there is too much, the gunpowder will be less powerful. This ratio mentioned by the owner of the village not only takes into account the flammability of gunpowder, but also can enhance the power of gunpowder explosion, which is indeed a good formula. When Wang Lun was in trouble, Tang Longdao, who was following Wang Lun, just to break the siege.

"Brother Tanglong is right! Although Brother Fool felt that increasing the proportion of saltpeter could increase the power of gunpowder explosion, he didn't know the reason, but Brother Tanglong was still erudite and talented, and Brother Fool admired. In fact, what is the effect of this ratio, we only need to prepare some according to the proportion, and we will know it by trying. Practice is the only criterion for testing the truth! Wang Lun said.

As soon as this remark came out, Wang Lun felt bad, and accidentally, he said a famous quote from later generations.

"Practice is the only test of truth?" Hearing this, Ling Zhen was stunned for a moment, and couldn't help repeating this sentence in his mouth, only to feel that the words were reasonable and wonderful.

"Alright, alright, let's not talk about that, let's talk about gunpowder and firearms." Wang Lun was embarrassed when he heard this, and hurriedly changed the topic.

"I don't know if my brother has any other wonderful insights about gunpowder and firearms, you might as well say it, and let my brother open my eyes." Sure enough, as soon as Ling Zhen heard Wang Lun's words, his attention was attracted.

"If you talk about firearms, there really is one, this kind of firearm, I call it 'landmines', that is, gunpowder and sharp and fine pieces of iron or copper are filled together in clay pots or hollowed-out stones, buried in the ground in advance, and if the enemy passes over it, it will be detonated, and the enemy can be killed and wounded." Wang Lun tried his best to describe it in a language that Ling Zhen could understand.

"The 'mines' my brother refers to are very similar to the 'gunpowder cannon', a firearm that has just been developed by the Gunpowder Bureau, but the 'gunpowder cannon' is filled with gunpowder with an empty iron ball made of cast iron, rather than a clay pot or hollowed-out stone as my brother said. Moreover, this kind of 'gunpowder cannon' needs a very long lead, otherwise it is very easy to be discovered by the enemy, and the lead is too long, and it is easy to extinguish in the middle of the burning process, so this kind of 'gunpowder cannon' has just been researched, and it has been denied by Shangguan. Ling Zhen said.

"Well, I've also seen this kind of 'gunpowder cannon', but the reason why Shangguan denied it was not all because of the problem of the lead, but also because of the difficulty of casting the iron shell, and it was a one-time consumption, which caused the cost to be too high. However, the 'landmine' that my brother said is more practical, the clay pot is relatively simple to fire, and it is not difficult to hollow out the stone, and the cost is low. Ling Zhen continued.

"Since the lead problem is difficult to solve, why don't we think of another way. If we put the flint in the mine gunpowder, and then design a device for the gold stone to hit the flint, the gold stone strikes the flint to produce a spark, which can naturally detonate the mine. Wang Lun thought for a while.

"That's a wonderful way!" Hearing this, Ling Zhenju's eyes lit up, and he couldn't help but think about the feasibility of this method.

However, the current black powder is not so easy to ignite, and how to implement this law still needs to be carefully considered. Of course, Wang Lun is only responsible for providing general ideas, as for how to solve it, it is up to Ling Zhen, a firearms expert, to find a way.

Seeing that Ling Zhen and Tang were deep in thought, Wang Lun did not disturb them and quietly left from the Firearms Research Institute.

Everything that can be mentioned has been mentioned, and Wang Lun believes that Ling Zhen will not let him down. As for some other more advanced firearms, such as muskets and the like, they are not possible with current technology, and even if Ling Zhen is informed, it will only make them think in vain and waste their energy, so it is better not to say it.

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