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The arsenal is the most heavily guarded place in Qinwangzhuang except for the palace. Outside the thick walls of the "Fun" www.biquge.infoPavilion, nearly 100 Qin soldiers were guarded in shifts day and night, and at the only entrance and on the towering watchout and bomb-making tower in the arsenal, there were special combat personnel eyeing them, and it could be said that not even a fly could fly in.

Zhu Youzhen, accompanied by Yan Ling, entered the arsenal and saw that it was a hot scene inside. The number of craftsmen working now has increased to about 100 instead of just about 20 people. Because he previously required all craftsmen to bring apprentices and not hide their secrets, the number of craftsmen could increase so much in a short period of time.

Because they were busy producing, except for the soldiers on guard, none of the craftsmen noticed Zhu Youzhen's arrival. Zhu Youzhen was silent, but watched behind them with interest.

It is clear that the arsenal is now divided into six main areas of operation. The simplest and most striking is the Bird Gun Bullet Production Area, which is the Lookout Bomb Tower. Now the craftsmen are very skilled in production, but there are only five or six people, some of whom are responsible for smelting the lead water, some of whom are responsible for pouring it downwards, and some of whom are responsible for fishing for the finished products in the pools below and loading them into the bullet boxes.

Zhu Youzhen watched for a while, and then moved to the operation area where firearm firing ammunition was produced. The work here is divided into two parts, one part is to first grind the raw materials for the manufacture of black powder into powder, and then mix them according to the ratio of "one sulfur, two nitrate and three charcoal"; The other part is to wrap gunpowder paper into small packets of exactly the same size, and when fighting, only these small paper packets need to be filled into the chamber of the gun. This not only saves time and makes the charge stable. This idea was still conceived by Zhu Youzhen, and now it is officially used in large-scale production.

The next artillery firing operation area is also similar. However, the firearms production area behind it is completely separated from the gunpowder area by a wall. Inside, there was a clanging sound, and it turned out that dozens of craftsmen were forging gun parts with small hammers, which was also the work area with the largest number of craftsmen. Of course, there will be sparks coming out of iron against iron, so it must be separated from the gunpowder zone.

Now the production of bird guns in the arsenal has realized "assembly line operation". The first process is casting, which uses the traditional investment casting process. The specific method is to first use wax to make a mold of the part, and then apply mud to the wax mold to form a mud mold. After the clay mold is dried, it is roasted in the oven. The wax inside the clay mold melts at high temperatures, but the clay mold outside is burned into a hard pottery mold, so that a hollow structure is formed. Molten steel is then poured into the mold, which is broken after cooling to obtain the required parts.

This investment molding method is ideal for casting smaller, irregularly shaped castings, and is perfect for making guns. Although it is a bit troublesome, after the realization of large-scale and procedural operations, the production speed is not slow.

Of course, due to the limitations of the sand mold, the cast parts will be somewhat rough, which also uses the second process: precision forging. It is said to be "forging", but in fact, forging and grinding are equally important, especially the inside of the gun chamber, which is the most difficult to polish, and requires special careful processing by ingenious craftsmen.

The third process is assembly, which is simple. With all the parts available, the craftsmen can assemble a brand new bird gun in less than a minute. Zhu Youzhen looked at the tea kung fu, and there were three bird guns assembled. He picked one up and held it up in a aiming gesture, feeling very handy.

"Who? Put the bird down! Suddenly, a thunderous roar sounded in Zhu Youzhen's ears, almost scaring him. Looking back, it turned out to be Sun Yuanlong, the director of the arsenal, and he was still as loud as ever.

Sun Yuanlong also recognized Zhu Youzhen, was stunned at first, and then wanted to pay a big salute. Zhu Youzhen hurriedly held him up, leaned close to his ear and shouted: "Director Sun, your arsenal is doing a good job!" ”

Sun Yuanlong smiled innocently when he heard this: "The Qin soldiers consume guns and ammunition every month for combat and training, and we all have a production plan here, and we can't slack off for a day." But these are not new things, Your Highness, do you want to take a look at the Franc cannon that the villain tried to cast, and the flowering bomb that was tried to be made? ”

Zhu Youzhen was overjoyed and followed Sun Yuanlong to the artillery casting operation area. Sun Yuanlong pointed to a few cannon pipes that had just been cast: "According to His Highness's orders, the villain imitated the shape of the Franc machine gun, reduced in size, and cast these cannons." This cannon is smaller in caliber than the Furlong cannon, but the firing range is not very small, and it can reach nearly three hundred steps. The most important thing is that the sub-gun charge is small, and the heating situation of the gun chamber is also better than that of the Furlong cannon, so it can fire seven to nine sub-guns in a row, and the rate of fire is twice as fast as the original. ”

"Old Sun, you really have you!" Zhu Youzhen patted Sun Yuanlong on the shoulder and praised, "The cannon light is far away, the shells are useless, the key is to hit accurately and quickly!" I think this gun is very valuable in real combat, and it is also more convenient to transport than the Furlong cannon. ”

Of course, Sun Yuanlong was very happy to be able to get Zhu Youzhen's affirmation, and said with a big grin: "This new cannon has not yet been named, since Your Highness is here, please give it a good name!" ”

Zhu Youzhen sighed and said with a smile: "Since the biggest feature of this kind of cannon is that it hits quickly, let's call it a 'rapid-fire cannon'!" Take me to see your blossom bomb again! ”

Sun Yuanlong obeyed the order and led Zhu Youzhen to another operation area, but saw that there was also a cannon here. Unlike the rapid-fire guns seen earlier, the barrel was very short, about ten times the caliber. Next to the barrel of the gun, a column of iron round shells was neatly placed.

Sun Yuanlong picked up a cannonball and flipped it in his hand, and said with emotion: "Since His Royal Highness instructed the villain to make flowering shells, the villain has blown up more than a dozen test cannons after repeated tests, and he almost didn't die. It is not difficult to achieve the effect of 'flowering' in the flowering projectile, as long as the fuse is added to the shell like a double kick. When the shell is fired and the fuse burns into the explosive inside, it explodes from the inside, and this is the 'flowering'. But the biggest difficulty is how to shoot the flowering shell smoothly instead of exploding in the chamber of the cannon! ”

"And how did you solve it?" Zhu Youzhen asked.

"There's no good way, try it a little bit!" Sun Yuanlong replied honestly, "The bullet casing is thin, and it will explode as soon as it hits; The shell case was thick, and the explosion was not powerful enough. Later, the villain suddenly thought that the barrel could be made as short as possible, which would reduce the pressure in the barrel. Give it a try, and it works! However, the timing of the explosion of the shells was still uncontrollable. Later, the villain made the fuse into a letter tube, and the letter tube was filled with fire twist. When fighting, the length of the fire twist can be cut according to the distance of the enemy. However, this kind of cannon is still not stable enough, and occasionally there will be explosions. ”

"It's not easy anymore!" Zhu Youzhen said happily, "Even if you continue to test, let alone blow up more than a dozen cannons, even if you blow up more than 100 guns, I can afford to pay for it!" ”

Sun Yuanlong received Zhu Youzhen's encouragement, and his courage increased greatly, and he said with a smile: "Your Highness, let's go and see the Lu Mi Gong that the villain tried to make!" ”