The history of muskets has gone through several stages, such as blasting muskets, fire door guns, clamping guns, flintlock guns, and finally breech guns.

Compared with the borehole, the advantages of the borehole gun are obvious. The borehole gun soldiers must load upright, the target is exposed too much, and the loading procedures are very complicated. It is very easy to make mistakes when busy on the battlefield.

For example, in a panic, you can stuff lead bullets instead of gunpowder into the muzzle first, resulting in no bullets being fired, and you can only exit the ranks and slowly dig out the warhead.

For example, if you forget whether you have fired a gun, loaded it many times, or even a barrel of a gun was stuffed with dozens of lead and bounced in.

The breech gun can be loaded in almost any position. Soldiers can be loaded in lie or kneeling positions, and hide in any cover, and it is even less problematic to use it immediately.

Moreover, the breech loading is very fast and there are few mistakes, so it is easy to troubleshoot problems.

Generally speaking, even if the fixed-loaded paper-tube ammunition is used, if the front bore is fired, the skilled soldiers will have a rate of fire of only three rounds per minute on the battlefield.

The breech can be much faster.

At present, the gun in Zhang Chugong's hand is a "brench gun". Of course, strictly speaking, it is just a "half-step brench". After all, it is not a copper-shell bullet or a fire cap. It is still ignited with flint or even a fuse rope, and it is also a bit worse in holding the breath.

Yang He took the bird gun from Zhang Chugong's hand and looked at it carefully. The three of them were all geniuses, especially Zhang Chuxun, who was also a genius in firearm making, so the bird gun he made for his brother in the early years was designed very reasonable and scientifically.

The gun holder is like a swan neck, which is conducive to holding and aiming with cheeks. There is a yin and yang machine on the fire door, which can prevent the medicine from being blown away by the wind in strong winds.

There are guns and swords inlaid on the guardrail, which can be used for shooting and stabbing.

At this time, his bird gun changed a lot. The original fuse head was replaced with a flintlock dog head style. The screw on it was tightened and flint was clamped on the mouth.

The Zhang brothers have some Sugang, and they will buy Sugang in the future. Yang He did not have to save money and made a piece of spring steel plate that was enough to make flint to use.

The back of the gun barrel also has a breech opening style, and the mouth is polished very smoothly. The gun barrel at the mouth is also wrapped with thick brass. After all, the breech is fired, and the bore pressure here is very high, so another layer must be wrapped.

Look at the fire gate. It turns out that the hole entrance is parallel to the fire gate nest, but now it is slightly inclined and expanded a little. In this way, after the fixed medicine inside is cut, the induction medicine will flow to the fire gate nest by itself, saving a few steps to open the nest and pour the medicine. This is very critical on the battlefield.

Finally, there is the copper bolt. Overall, if the straight-wall flange copper shell used by the early soldiers, it is just an enlarged version.

The bolt handle is bent downward, just like the downward bolt handle of the Mauser rifle. It is not only beautiful, comfortable to operate, but also easy to carry, and does not easily cause debris.

The copper bolt is exquisite, especially the front "bombshell" is polished smoothly, so it can be easily stuffed into the gun barrel, but it is not too loose. The seams are in place, and it has a good air closure effect after firing.

Yang He secretly praised the three brothers for their skill. He saw an arc knife at the front of the copper plug, stuffed it in and rotated it, and then the fixed-loaded paper tube ammunition can be cut and smashed. The soldiers do not need to bite it themselves, just stuff the medicine in it.

The more he looked at it, the more he liked it, thinking that if every bird gun was like this, the loading would be convenient.

Zhang Chugong and the other two were still shocked at this time. They were talking excitedly. Zhang Chuxu's beautiful face showed contemplation. He looked at the gun in Yang He's hand and finally said: "Is this design of my husband Ruo Zhao Sheren's thunder-drawing gun?"

It also seems that Zhao Shizhen invented the thunder-drawing gun from the inspiration obtained by Folang Ji. Each gun has five pieces of guns, which are five bullets. The front end of the gun looks like a small round mouth, and there are flat square bamboo shoots at the back. There are eyes in the bamboo shoots, so they can be connected to the mother gun with pins.

When firing, it is no different from ordinary bird guns, because the sub-gun is pre-loaded and the breech is loaded, so the firing speed is very fast.

But there are also all the problems with breech guns in front of metal bullets. The air leakage is extremely serious and the power is small. Not to mention the fact that it is not far away. Moreover, the nature of iron is that it is difficult to trap the sub-gun and mother guns.

The anger will often ejaculate, hurting Sagittarius, making them covered in their faces, and even becoming one-eyed dragons. Therefore, although the design is advanced, few soldiers dare to use it.

Yang He smiled and said, "It is indeed inspired by Zhao Shizhen's servants, so I named this gun the new thunder gun."

Zhang Chuxun pondered and said, "The new thunder gun...the villain has also used it, and I feel it is with this..."

He murmured: "The villain has always wanted to improve the thunder-drawing gun. He thought a lot, but why didn't he think about using copper?"

Yang He smiled. The most difficult thing to solve for breech guns is the locking mechanism, which requires both smooth opening and closing and effective breathing. However, except for the very precise steel spare parts stamped out in later generations, no method in this era is useful, only brass is used.

Brass has a characteristic, which is that it will expand when heated. If the bolt stick is in contact with the tube, the copper bolt stick can expand and lock the back of the bore after it is fired, solving the problem of air leakage of the breech gun.

Of course, it is impossible to completely hold your breath if you stuff a smooth copper stick like Yanghe into it. Only the Mauser-like rifle locks can lock your breath more effectively.

And this is not enough. If you want to hold your breath completely, there is only one way in this era, or the only way is to use a brass bullet shell.

When breech guns were prevalent in later generations, countless people worked hard to solve the problem of paper shell bullets and holding back their breath, but they all failed.

All wisdom, countless efforts, any means of holding your breath, such as Hall M1819, Dresse M1841, Sharps descending lock-up rear-loading gun, as long as you use a paper shell, it cannot solve the problem of holding your breath after loading the gun.

The only way to do everything is to use a metal bullet, a brass shell that has been used for a long time, to solve this problem.

The brass metal shell will expand when fired. Because it is thin and fits with the breech wall, it will expand completely, completely solving the problem of air leakage of the breech gun. The brass metal shell is used, and the moisture-proof problem of ammunition is also solved.

This is the only way. Even the rough brass shell bullets that were rolled by hand in the early days were countless times stronger than the most sophisticated paper shell bullets in terms of air closure.

Of course, although Yang He knows ideas and history and technology, he has no choice now.

The locking convex bamboo shoots and brass shells of the gun bolt have too high technical requirements and require huge manpower and material resources. He does not have this ability now.

Brass bullets must also solve another problem, the Fire Hat.

This is a must.

Without a fire cap, in addition to air leakage at the bottom of the chamber, the fire door will also leak, and it is also a serious air leakage. However, there is no way to use fuse or flint to make fire. The fire door is essential, which reduces the power of the bullets.

Let’s do it step by step. At present, Yang He is already very satisfied.

After Zhang Chuxun thought about it, he solemnly said: "The villain thinks this gun is better than the thunder gun, and it is completely different from the inside. Why not change a name and call it Xianggong Gun?"

Zhang Chujing clapped his hands and said, "The name of Xianggong Gun is good."

Zhang Chugong also praised it.

Yang He laughed, he didn't care what his name was. He also tried to test it, fired a few live ammunitions, and finally estimated that during training, the gun could hit ten to twelve shots in one minute, which was almost the same as the uniform shooting speed of the bow and arrow.

On the battlefield, even if there are all kinds of psychological pressure, it is estimated that it will be fine to hit five to seven shots in a minute. Even excellent shooters can hit seven to ten shots in a minute.

This speed is very fast, especially in terms of cleaning and heat dissipation, and can fire at least twenty fixed-load paper-tube ammunition in a row without cleaning the chamber.

Seeing this shooting speed, Yang He was very satisfied, while Zhang Chugong and others were shocked. It was too fast. Is this still a bird gun?

However, there are also regrets. Because of the air leakage, Yang He felt that the power and range of this breech bird gun were weaker when it was fired.

Yang He estimated that the range was five to ten steps weaker than the original one.

He sighed in his heart, indeed, it is impossible to have both fish and bear's paws.

...

Yang He and Zhang Chuxun and others discussed another improvement. This breech gun is actually a first-hand product and there are still many aspects to be improved.

For example, the problem of the precious copper plug falling, the copper plug can be pulled out at will and held in your hands to play with it. However, when placed on the battlefield, the soldiers cannot pull out the copper plug and put it on the ground before filling the medicine, right?

And what should I do if it falls?

There must be something fixed.

In this regard, Yang He borrowed from the safety sheet of the later gun bolt, and set a protrusion on the end of the copper bolt cap, and at the same time, a movable metal sheet is set at the buttstock.

When the metal plate is pushed to the right, the copper plug can be twitched and filled, but the metal plate blocks the bulge of the cap so that it will not fall.

Push the metal plate to the left and the copper plugs can be pulled out for maintenance or replacement.

There is also possible air leakage.

If the copper tamps are made by Zhang Chugong and three people, of course there will be no problem, but there will definitely be many craftsmen in the future, with different quality and different levels. Even if the standards are strictly followed, some accidents will inevitably occur and must be solved from the source.

Yang He decided to set up a protective bin cover outside the copper bolt, and he used charcoal strips to draw patterns on a board.

The bin cover is connected to the copper cap. When the copper pin is pushed and locked, the bin cover will also wrap one end of the gun barrel in, and stop at the fire door, forming a protective bin.

From the side, it looks like a rectangular box, like a coffin.

This actually forms a three-layer air-retaining, copper bolt, copper cap with a bottom flange shell, and finally a silo cover.

Even if the process does not meet the standards, there is a serious air leakage problem, because there is a guard on both sides and gas leakage, it will be covered by the bin and head forward and upward.

In this way, the gas leaks from the upper front of the bin cover and will not hurt people. It will filter heavily and will definitely be a warm white mist, not as hot as the Folang machine or the thunder gun.

Zhang Chugong and the other two listened quietly, watched, and listened to Yang He's explanation.

They were all very excited. After following Yang Xianggong, they learned too much.

But these things were all secrets that were not passed on, but Yang Xianggong generously taught them that he was really following the right person.

Yang He was painting on the wooden board. He looked at the pattern in front of him, but sighed in his heart. At present, he could only reach this point.

To completely solve the problem of air leakage, the only way to use more finer brass metal shells and locking convex bamboo shoots is currently in the future.

Take your time, it would be great if this could be popularized.

And it only fights within a hundred steps, and it doesn't matter if you lose a little air.

Just have strong firepower.
Chapter completed!