Hearing that Shen Shuren himself came up with some design requirements for the follow-up new firecracker, Song Yingxing, Zhou Tiedan and others were still a little surprised, and hurriedly expressed their willingness to listen carefully.

Although Shen Shuren had also shown foresight in firearm technology before, he mainly worked piecemeal, changing bayonets, bullets, fragmentary attachments, etc., and never showed a talent for the overall design of firearms.

Seeing everyone's expressions and reactions, Shen Shuren could also guess what they were thinking, but he didn't care, and directly took out a sketch he had drawn casually recently, as well as a few text descriptions, and explained:

"Today's Lumi Gun, even if it is repeatedly improved, is still slow to reload after all. Originally, the ammunition was divided into at least thirty or forty breaths to fire once, and the old-fashioned fire hammer with the fire rope had sixty breaths.

After Lu Mi Gong switched to paper bullet shells, it was already a lot faster, but at least it was nearly twenty breaths.

In contrast, the Tartar cavalry warriors, when the enemy breaks out, shoot a series of arrows, three or four breaths can release an arrow, and shoot randomly without aiming. Even if you aim slightly, you can shoot an arrow in five or six breaths.

So I thought, at the moment, if there is a way to improve the new firebolt, the range, firepower, and accuracy can be put on hold for the time being, and the first thing to solve is the rate of fire.

In the face of cavalry, the bow and crossbow are no more than three arrows in battle, and if the bird can't even do this density, in the future, large-scale field battles and formation battles will be rushed to the front by the enemy, and at least half of the benefits of firearms will be wasted.

This officer led the army for two years, but I have to say that he was lucky before, he did not encounter a first-class strong enemy, nor did he fight against a large army with large cavalry. In the future, when encountering Li Zicheng, Zhang Xianzhong, and even Tatar, it will not be as easy to deal with Erhe and Liu Xiyao as before, and the firearms must strengthen the rate of fire. ”

Song Yingxing and the others had no objection to this direction of effort, they also looked at Shen Shuren's sketch roughly, and the drawing was relatively abstract, but fortunately, it was drawn with a ruler, but it was not crooked.

Song Yingxing pondered for a few seconds, then understood, and asked: "So, the method that the Daotai hopes for to increase the rate of fire is actually counting on cutting off the barrel and loading ammunition from the bottom?" This line of thinking is a bit similar to the son-and-mother Franc machine used on the cannon. ”

Shen Shuren didn't know much about the history of artillery development in the Ming Dynasty, and he hadn't used the Franc machine, so he couldn't help but be a little surprised when he heard Song Yingxing's comment.

When he first arrived in Huangzhou for half a year, he accepted Zheng Chenggong as his younger brother, and Zheng Chenggong gave him a Hongyi cannon. Shen Shuren can be regarded as having made it difficult to go from luxury to frugality, and as soon as he came up, he used a better and more advanced existence, so he was too lazy to find a Buddha machine from the previous era.

He couldn't help but ask, "What?" Does the Franc machine have a reload from behind? What does it look like? Then why haven't you seen it on the Hongyi cannon? ”

Song Yingxing came easily, drew a sketch for him, and said: "I can't remember the details of this picture, it should be drawn like this, and the old man also saw it from Bi Shilang's "Illustration of Weapons". ”

Shen Shuren looked very seriously, and saw that Song Yingxing drew a Mauser rifle with a similar structure to the later Mauser rifle, with an opening at the top of the magazine, which could directly stuff the chamber (sub-gun) preloaded with gunpowder and shells into the tail of the gun barrel and connect it with the gun barrel. There are also some tenon locking mechanisms for fixing.

After all, when firing, the recoil force received by the gun is the same as the forward force received by the shell, and it requires a very strong rigid locking mechanism to resist it (not much explanation, see the figure in this paragraph).

Shen Shuren touched his beard and pondered, and asked exploratory: "It seems that this method of reloading from the back is quite mature, it is nothing more than a mother gun with a few more sub-guns, and use it in exchange - then why didn't the later Hongyi cannon use this method?"

Even if it is a Franc machine, when He Yilong was defeated and retreated in May, our army also captured two thousand pounds of Franc machine that could not be taken away by the enemy when retreating because it was too heavy, and I had never seen this kind of reloading of the son-and-mother gun. The official had heard of the son-or-mother gun, but he had always thought that the son-gun was also stuffed in from the front of the barrel. ”

Song Yingxing shook his head proudly, and took the opportunity to say: "You don't know, this Franc machine uses a son-mother gun, and it is only used on models of three hundred catties and smaller, and the thousand-pound Franc machine is no longer good, because this kind of air leakage and fire leakage is too serious, it can't hit far, and it is easy to burn the gunner."

As for the Hongyi cannon, it is easy to have 35,000 catties and a charge of more than 10 catties, so powerful, who dares to use the design of separating the bullet gun and the barrel mother gun? Once fired, the force of the gun being pushed back could not withstand it at all, which was tantamount to exploding ten catties of gunpowder directly on the gun position, and I am afraid that not the gunner would have to be blown up! ”

Shen Shuren nodded, and quickly reacted: breech loading, in the final analysis, is still a problem with poor air tightness and recoil.

However, it can also be reversed from Song Yingxing's words: the more powerful the gun, the more it needs to be tightly closed and stable at the bottom of the barrel. And the less powerful the firearm, the more relaxed this aspect can be.

After figuring this out, Shen Shuren also realized that this was the same as his own original idea-the breech loading gun could not be built, but the high chamber pressure could not be made, and the low chamber pressure could still be made.

Just as in the early 20th century, all countries were dealing with rifles and machine guns, and the bolts at the tail of the barrels of rifles and machine guns were locked at the moment of fire and would not retreat.

But at the end of World War I, after the appearance of submachine guns, the tail bolt of the submachine gun was "inertial locking", that is, it was not completely locked, and it would slide when pushed by recoil.

The advantage of a submachine gun is that it can fire quickly and continuously with low recoil, but the disadvantage is that the chamber pressure it can tolerate is low, so it can only use pistol bullets with a much smaller charge and a much shorter effective range.

In the same way, when breech firearms appeared in modern times, the first to overcome breech defects were pistols and trolls. For example, the old double-barreled shotgun, which looks similar to the S686 in the chicken, as well as the later improved lever rifles and revolvers, are the first varieties to be loaded from the bottom of the barrel.

These guns don't need any technical reserves after the industrial song, and they can be built by relying on the industrial foundation before the Napoleonic Wars.

In contrast, many rifled rifled guns that are very fond of crossing seem to be more troublesome. The self-attacking rifling bullet of the Mini bullet was only available in the middle of the 19th century and after the second industrial song, which was much more difficult than the things that Shen Shuren wanted.

After smoothing out his thoughts during the discussion, Shen Shuren took the opportunity to formally put forward his needs: "Therefore, this official does not want to build a new firearm with many charges and a long range, as long as it can be reloaded, it is best to pre-load multiple projectiles and quickly supply ammunition."

For example, make a circlip dial, and then make a honeycomb-shaped nest, a shaft in the middle, and six empty positions on the side, and turn one-sixth of a turn when the trigger is pulled......"

Shen Shuren said as he added a drawing, drawing the reloader and revolver in his mind.

Of course, he also knew in his heart that his current industrial precision and steel quality, and the processed pistols must be less accurate than the revolvers of the late 18th century in the West. The airtightness is even worse.

The earliest revolver in the West emitted billowing black and white smoke as soon as it was fired, and when he came to him, it was estimated that it would not only emit smoke from the back, but also directly emit fire.

It is estimated that the gunners who use revolvers will have to wear gloves that are better fireproof and insulated to prevent the skin on their hands from being burned by the fire that rises from behind when the gun is fired.

Song Yingxing is obviously knowledgeable, and after listening to Shen Shuren's description, he has already made up a product that "miniaturizes the three-hundred-pound Franc machine to three pounds and makes it into a runner nest to supply bombs".

So he couldn't help frowning, and told Shen Shuren about the above worries: "...... My lord, you have to be cautious about this, the effective range of today's bird guns can still be 150 steps, and with shotguns, it is only 70 or 80 steps.

This is still against the unarmoured. If you use a shotgun against heavy armor, you will only be able to kill thirty steps, which is also what you summarized in your previous battles with Erga.

Now it is changed to a breech leak and a leak of fire, and the old man compares the power of the one-piece Franc machine and the son-mother Franc machine by analogy, and at least one-third of the gunpowder thrust will be discharged, or even more.

When the time comes, it will be completely useless to use a single-headed bullet, and it will be completely useless if it has no head and no range. It can only go all the way to the black with shotguns, and the new gun with shotguns has a further weakened range, and I am afraid that it can only break heavy armor in 20 steps and hurt light armor in 40 steps. This is less than a third of the range of a bow and crossbow, so what is the use? ”

Song Yingxing can see that with such a low chamber pressure, he can't make a "rifle" at all, and he can only make a pistol and a troll.

But after hearing this, Shen Shuren was not disappointed at all, but was complacent: Look, Song Yingxing has estimated that this weapon still has at least 40 steps of strong killing distance for unarmored targets and 20 steps of heavy armor killing, which shows that there is a lot of hope for it! That's enough!

The pistols and trolls of later generations are not effective at 50 meters? Is it only 40 steps to the Ming Dynasty?

He was not very demanding, and said very casually: "It doesn't matter if the range is short, the range is short, it is nothing more than that in the future, you will not be able to rely on this weapon to resist cavalry on foot, and you will not be able to fight with the Tartar archers."

But for now, we have to deal with mainly thieves, and it is enough to be able to provide a few rounds of ferocious firepower before and at the end of the melee engagement. In addition, since the chamber pressure is low, the firing range is short, and the charge is small, I don't think the barrel needs to be as long as it used to be.

Originally, they were all five-foot long pipes, but the new ones could be reduced to three feet, so that the cavalry could also be used on horseback. No matter how short it is, it can even be used with one hand, which is almost like a handcuff.

After it is built in the future, we will not equip light cavalry and archers, but will only equip cavalry with charging and melee combat, is it much better than the three-eyed gun? ”

The three-eyed gun of the Ming Dynasty had a very short barrel but a very long handle. Because the tube is short, the range of that thing is more pitiful than that of a pistol, so it is for melee cavalry, and after three sprays, it will be used as a long-handled hammer.

If Shen Shuren can make a carbine troll with a medium barrel, or simply a revolver that fires shotgun iron sand, he will definitely be able to strike in melee combat.