Small is not allowed to be too small. Once the bullet is small, it will have no air tightness to speak of, and naturally there will be no power to speak of.
Therefore, the bullet must be as large as the diameter of the tube.
After lowering his head and thinking for a moment, Han Du said: "Although you can't make the bullet smaller, you can make it shorter. Isn't that okay?"
Lin Mo nodded and replied: "The villain understands, then the Marquis will wait for the villain to do it again?"
Once the length of the bullet is changed, even the structure of the breech-loading gun needs to be remade. In other words, the gun in Han Du's hand was useless before it was fired.
After thinking about it, Han Du thought he could give it a try. What if this gun could withstand bullets? Wouldn't that be better? The more gunpowder the bullet contains, the more powerful it will be, and of course it will shoot farther.
"You can give it a try."
After Han Du finished speaking, he opened the bullet chamber and pressed the bullet in.
Seeing Han Du's actions, Lin Mo was shocked. He quickly stepped forward to hold Han Du's hand and said loudly: "No, Lord Marquis, you must not open fire. If anything happens to Lord Marquis's golden body, the villain will die." You can’t atone for your sins.”
Han Du let Lin Mo grab the breech-loader and sighed, "When did I say that I would just open fire like this?"
"Hou, aren't you going to test the gun?" Lin Mo was a little confused.
Han Du nodded and said: "I do want to test the gun, but not with my own hands as you think. I know the danger, but I still try it with my own hands. Do you think I am a fool?"
"Yes, yes, the villain is not thinking carefully." Lin Mo was now relieved and said with a smile on his face.
Han Du did not argue with him and directly ordered: "Go and find a place for me to stand up."
When Lin Mo asked someone to bring over a wooden frame, Han Du ordered them to tie the breech-loading gun to the frame, then put a long rope around the trigger, and hid behind the wall while holding the rope.
After clearing everyone around him, Han Du suddenly pulled the rope in his hand.
"Boom~"
There was an explosion, and Han Du hid behind the wall with one eye on the breech-loading gun. I saw with my own eyes that it was blown into two pieces from the bullet chamber, with wood splinters flying everywhere, and the sound of wood chips falling to the ground filled my ears.
The rope that helped load the gun had long been broken, and even the wooden frame was damaged to a certain extent.
Han Du and Lin Mo went up and saw the mess on the ground. Lin Mo opened his mouth wide. He was now extremely lucky to be reminded by the Marquis, otherwise he might not even have been able to save his life if he had tried it rashly.
Han Du was not too surprised. When he saw the size of the bullet given by Lin Mo, he guessed that it would probably explode. Because the strength of steel now is far different from that of the future, it simply cannot withstand such a violent impact.
What surprised Han Du was that even the steel pipe was torn apart by the explosion. Han Du reached out and picked up the steel pipe with half of the wood tied to it. You could clearly see that the steel pipe was torn apart along an almost straight line.
Without even thinking, Han Du could guess that this line was probably the original seam of the steel pipe.
"It seems that it still doesn't work..."
"Master Hou, do you still want to try?" Lin Mo asked softly.
Han Du stood up slowly, shook his head and sighed: "No need to try, these steel pipes are not good, and there will be no results if you try again."
Seeing the disappointment on Han Du's face, Lin Mo thought that making firearms was in vain, so he couldn't help but said: "What kind of pipe does the Marquis want? Tell me, maybe the villain can make it."
Han Du picked up the blasted and cracked steel pipe, pointed at it and said, "Do you see this gap? This is the joint of the steel sheets. This was originally forged by overlapping, but now it seems that this will not work. "
Lin Mo looked at it for a few times and suddenly said: "Master Hou, maybe there is a way I can try."
"What solution?" Han Du frowned, a little suspicious that Lin Mo had thought of a solution so quickly.
Lin Mo didn't pay attention to Han Du's expression and said directly: "Master Hou, the craftsmen who make copper pots know a technique of seaming the edges. Only this technique can connect the copper pots tightly and ensure that It won’t leak. I think this method can be tried.”
Han Du nodded secretly as he listened. When Lin Mo said wow, he couldn't help scratching his face and asked quickly: "Do you know this kind of skill?"
"The villain is not talented, but he just happens to know this skill." Lin Mo nodded matter-of-factly.
Han Du suddenly became happy and said with a smile: "Okay, then you can try it."
Immediately, Han Du told how Tao Chengdao hammered steel sheets into steel pipes.
At the same time, he also suggested: "I think you can make that special anvil longer, preferably to roll out a four-foot-long steel pipe at one time."
Lin Mo nodded and agreed.
A few days later, Lin Mo sent news again that he was ready and asked Han Du to try it.
Han Du came to the weapons bureau and looked at the breech-loading guns on the table. Han Du was surprised by the bright silver metal gun body.
"Did you use that special steel?"
Lin Mo nodded with a smile and replied: "Isn't the Marquis worried that this gun will explode? I think it might be better to use this kind of fine steel to make it."
It would be better, but the price... well, I had already done it anyway, and Han Du was too lazy to say anything more.
No matter what, you have to try first to see if it works.
He opened his hand to Lin Mo and took the bullet.
this one
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The bullet made by Ci Linmo was half shorter than the last time, like a fattened revolver bullet. With the bullet loaded, Han Du put the rope on the trigger again and hid far away behind the wall.
Pull hard, "Bang!"
This time there was no explosion and the barrel was intact.
However, the target standing twenty feet away was also intact, without even a layer of skin falling off. With the huge power of this breech-loading gun, if the bullet hits the target, it will definitely leave a hole.
Obviously, the accuracy of this breech-loading gun was so poor that the bullets flew to nowhere even at a distance of twenty feet.
"Try again." Han Du ordered, asking Lin Mo to continue loading bullets.
Firstly, I wanted to see if this breech-loading gun was reliable. Secondly, I want to see how accurate this gun is?
After trying dozens of bullets in succession, Han Du was very satisfied with the strength of the gun body. After firing so many bullets, he did not see the slightest change. Obviously, the gun was reliable after all.
But it was so accurate that Han Du was disappointed. After firing dozens of rounds, there was only one bullet hole in the target. The target is made of one-inch thick elm boards, which is very hard. But the bullet easily punched a hole through the target, and the edges of the hole were smooth. It was obvious that the bullet was very powerful.
The power is enough, but the accuracy is just a bit off.
Such accuracy is even worse than that of a revolver.
Han Du frowned and stood up, muttering to himself: "It seems that it still needs to be engraved with rifling."
"What?" Although Han Du's voice was low, Lin Mo had always focused on Han Du. As soon as Han Du's words came out, he heard them.
Seeing the curious look on Lin Mo's face, Han Du picked up the breech-loading gun, pointed it into the barrel, and explained: "The bullets are fired from here. If they don't rotate, they won't be stable enough. They will fly everywhere."
"Master Hou, is it true that with the rifling mentioned by Master Hou, the bullets will not fly around?" Lin Mo asked curiously. He knew that every time Han Du said something unheard of, it was an incredible skill. Now that he encountered it again, he naturally wanted to find out what was going on.
Han Du nodded and said: "Of course, this gun has rifling or not, but one is in the sky and the other is in the ground."
With that said, Han Du explained to Lin Mo what rifling was, making Lin Mo excited. But after knowing that sloping lines must be carved into such a small tube, and the slope of each line must be the same.
Lin Mo shook his head and said it was too difficult. Just saying that he would give it a try did not guarantee that he would succeed.
A few days later, Lin Mo came to Han Du with a steel pipe carved with rifling.
Han Du raised the steel pipe, pointed it at the sun, and frowned after just one glance. No wonder Han Du is dissatisfied, it's because the rifling inside is shallow and unevenly spaced, making it look as if a dog has gnawed it.
"I'm afraid this won't work. These lines are not smooth at all. They may be easily worn out by the violent impact of bullets." Han Du said with a frown.
If the rifling is not worn out, the gun is useless.
Lin Mo smiled bitterly and nodded, and said: "I also know that I am afraid that it is far from meeting the requirements of the Marquis, but this is already the best one that I asked the master craftsmen of the Ordnance Bureau to try their best to make. . Others were even worse, and some were even scrapped."
"What's the problem?" Han Du also knew that it was not easy to get this thing. He did not blame Lin Mo, but asked the reason.
Lin Mo glanced at Han Du gratefully, and quickly explained: "There is only one problem, and that is that the steel is too hard, and it is almost impossible to carve it with human power alone."
In order to avoid exploding the barrel, Lin Mo wanted the tube to be as hard as possible, but now that he had to carve rifling lines, Lin Mo wanted the tube to be softer and easier to carve. However, this is obviously impossible.
Not done by humans...what about machines? Han Du's eyes suddenly opened, and he immediately thought of the steam engine in the academy.
Although this thing is a tuberculosis ghost now, it can be used reluctantly in a short period of time. As long as a combined auxiliary machine is designed, with the powerful power that the steam engine can provide, there should be no problem in carving a few riflings. At most, the sealing glue is easily damaged, so what if it is damaged? Just change it in time.
"Don't worry about this matter. I will find a solution." Han Du waved his hand to appease Lin Mo.
Lin Mo breathed out immediately, nodded and replied, "Okay." If the Marquis insisted on him doing it, he really didn't know what to do, but now he just went with his wishes.
"In addition, if you make more steel pipes, I will use them." Han Du made a request to Lin Mo.
Lin Mo immediately nodded in agreement. He didn't need to think twice to know that Marquis must find a way to carve rifling on the steel pipe. Although he was curious about how the Marquis could engrave the rifling, but since the Marquis didn't say anything, he couldn't ask any more.
...
Han Du ran to the academy that day and found Sun Xian.
Sun Xian thought Han Du had some good news, and he looked excited.
However, Han Du asked him to find a way to make a machine.
Now Sun Xian is devoting himself wholeheartedly to the steam engine, and it is about to succeed. This is a matter of hundreds of thousands of dollars. Naturally, I don’t really want to do it, so I want to make some other machinery.
However, Han Du persuaded him, "Although the steam engine is good, without rubber, I can tell you clearly that it is impossible to actually make it."
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come out. Instead of wasting time waiting in vain now, why not take this opportunity to make some machinery that requires steam engines to drive it? In this way, once the rubber is ready and the steam engine is built, wouldn't it be possible to use it immediately? "
"Besides, I won't let you work in vain. How about five thousand guans?"
Sun Xian didn't care whether it was five thousand guans or not. But I think what Mr. said is very reasonable. Now that we can make something that can use a steam engine, we can go into battle directly without wasting time at all.
With Han Du's advice from the side, Sun Xian and his students, after more than half a month, actually built a machine that can carve rifling.
This kind of machinery is more complicated, but when Sun Xian saw Han Du modifying the steam engine, he was shocked by the clever use of mechanical linkage. Therefore, when making this rifling machine, he also subconsciously tried his best to automatically realize Han Du's various requirements through various linkages.
After the machine was ready, Han Du was so happy to see that he was hunting, and he couldn't help but ask Sun Xian to start the steam engine, ready to test whether the machine could carve out rifling.
As the machinery is connected to the steam engine, the steam engine slowly and continuously generates power.
The long pole with the carving knife slowly but firmly pushed towards the steel pipe. The moment the two came into contact, Han Du's heart almost jumped out.
Without any obstruction, the carving knife advanced slowly and firmly into the steel pipe, and the speed was not affected at all.
"Successful." Han Du clenched his fist happily. The tension in my heart has not relaxed at all. Now it depends on whether I can penetrate the steel pipe in one breath.
Sun Xian also watched with bated breath. When the carving knife came out from the other end of the steel pipe as expected, he breathed a sigh of relief.
After finishing the first step, I quickly continued with the second step, the third step... I carved six steps in a row before the carving was completed.
Han Du opened the machine, took off the steel pipe, and looked into the pipe toward the sun. The six engraved lines are arranged evenly and neatly, with graceful arcs, looking like a perfect vortex.
Han Du nodded with satisfaction, "Okay, that's it. Five thousand strings will be delivered to you tomorrow. In addition, you can carve these things out for me like this. Also, this machine must be closely guarded. , no one can come in and contact it without my order, let alone use it."
"Thank you sir." Sun Xian replied with a smile. After all, it was five thousand guan. What was allocated to him was a thousand guan, which was not a small amount of money.
At the same time, Sun Xian, who heard Han Du's instructions, quickly made a promise: "Don't worry, sir, this place will be sealed off immediately after the students use it."
Han Du nodded and walked away with the steel pipe in his hand.
He came to the Arms Bureau to find Lin Mo and handed him the steel pipe in his hand.
Lin Mo just took one look and was extremely surprised. He asked with an incredible expression on his face: "Master Hou, how did you do this?"
Only by doing it himself did Lin Mo understand the difficulty of carving rifling in this steel pipe. He originally gathered all the master craftsmen of the Ordnance Bureau to come up with a solution, but the best one he could draw was the one that Han Du thought had been gnawed by a dog.
Sun Xian held the steel pipe in his hand and looked at Ji Ji repeatedly, his eyes as gentle as looking at the beauty under the lamp. The engraved lines are evenly arranged and the arcs are smooth and graceful, giving it a unique sense of beauty. It was as if what he was holding in his hands was not cold steel at all, but warm jade.
Han Du laughed and didn't tell Lin Mo.
Lin Mo also realized instantly that this was probably the Marquis's secret, and immediately stopped asking.
Han Du also changed the topic and said, "Well, you can make one first."
"Okay." Lin Mo turned around and left in excitement, carefully holding the steel pipe in his hand like a treasure.
Han Du tried the newly made breech-loading gun, but it turned out that the power was not as good as when there was no rifling on the front, and the bullets were flying everywhere.
Han Du was puzzled. He checked carefully and found that the rifling was there, but the bullet was still the original size, and the rifling effect was not used at all.
Lin Mo was asked to re-make the bullet to match the size of the rifling. The power of the improved bullets has indeed improved greatly, and the accuracy has also improved by leaps and bounds. Ten times out of ten, he hit the target, and the landing spot was very concentrated.
But a new problem has arisen. Even the brass bullet has shocking rifling wear. After firing a hundred times, you can clearly feel the accuracy decline. After three hundred times, the rifling was almost worn out and completely unusable.
After Han Du found out, he couldn't help but shake his head. He didn't expect that the breech-loading gun was just like the steam engine. It was a tuberculosis ghost and not durable at all.
Although this breech-loading gun is easy to load, it is also very powerful. But if a new one is made but can only be used a hundred times before becoming useless, then the price is too high.
Even if Ming Dynasty has gold and silver, it cannot afford to spend it like this. Therefore, we must find ways to reduce the wear of the rifling.
Since copper doesn't work, we can only try softer lead.
Lin Mo followed Han Du's idea and replaced the warhead with lead.
After trying it, I didn't expect it to work very well. The lead will expand under the squeeze of the gunpowder explosion. Due to the expansion of the bullet, the bullet itself can be relied on to complete the sealing of the chamber at the moment of launch without leaking gas. And since lead is much softer than copper, the wear on the rifling is negligible.
(End of chapter)
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