In addition to the short life of the barrel of the hairstyle, Li Junxian also found a fatal weakness, that is, the recoil is too large. The recoil of this kind of flying thunder cannon is very huge, and it had to be half-buried in the dirt on the original battlefield, so that the soil can absorb his recoil. However, buried in the soil, the launch angle is not very good, and it cannot be adjusted at will, which is a very big loophole.

However, Li Junxian also has his own solution, but the reality does not have such conditions. The solution to recoil is very simple, that is, put a large brake on the tail of the flying thunder cannon, but this brake needs a spring. However, the spring steel needed to make springs seemed to be completely available in the Tang Dynasty. Li Junxian knew that spring steel was an alloy, but Li Junxian didn't memorize how to produce spring steel, so now he is sad.

"Alright, let's move on to the next one. Let's not do the Tiger Squat Cannon first, this principle is the same as the Flying Thunder Cannon, I'm afraid we can't make the Tiger Squat Cannon. Let's focus on a swarm of rockets. Li Junxian said.

The so-called swarm of rockets is actually to tie a small powder box to the rocket, then fix the rocket in a canister, and then ignite the fuse of the powder box, and then the arrow is launched under the impetus of gunpowder. This rocket has no other advantages than a particularly long range. And that powder box, don't expect him to explode and kill the enemy. The ancient rocket warhead was actually just that sharp arrow, and the gunpowder only increased the range.

But don't underestimate this increase in range, he can also reduce the use of manpower. Usually it takes dozens of people to launch an arrow, but with this swarm of rockets, one person can launch it. This is to make up for the lack of numbers, resulting in the lack of arrow density enough. And his ultra-long range is beyond the reach of manpower. During the Ming Dynasty, many generals used this swarm of rockets to suppress the enemy's bow and crossbow, and the effect was surprisingly good. In the Ming Dynasty's Zhu Di Jingjing War, both sides used a lot of rockets. Used to suppress the enemy. Although the range of the rocket is not as accurate as that of a human bow, its firing density and range make up for it. If there is a disadvantage, it is that it is too expensive. So arrows rained down, and there was also the cost of gunpowder. That's a lot of money! Li Junxian was already secretly thinking that if he and the entire Tang Dynasty were armed with firearms, then I am afraid that with the current finances of the Tang Dynasty, they would have to go bankrupt.

"Masters, how are you doing?" Li Junxian asked.

"General, this thing is not difficult, it is easy. Just tie a small box to the arrow and you're good to go. We can make one now. The chief artisan said.

The leader of the craftsmen quickly led the craftsmen to start making, and in less than half an hour, a rocket was made. Li Junxian found a stone to frame this rocket, just like when he was a child, he set off a cupola. Ignited the lead.

"Whoosh!" With a crisp sound, the rocket flew into the sky.

Li Junxian looked at the arrow that had lost its shadow, and immediately knew in his heart that this experiment was likely to be successful. Li Junxian walked forward for about 700 meters before finding the scorched arrow on the ground. Li Junxian picked up the arrow. Then I looked back at the place where it was probably launched.

"It deviates by at least an octave, which means that the longer the range, the more inaccurate it becomes. If you want to use rockets, you can only use weapons in big waves in places where the enemy is dense. Li Junxian estimated the characteristics of this rocket.

Although the rocket was at least an octave away from where it was launched, this was only possible with the addition of the arrow's tail. If there is no tail, then I am afraid that it will simply fly around. It would be nice not to hurt your own people when the time comes. However, the range of this rocket is 600 meters, which is not much from the ultimate range of this rocket. Moreover, this one can be used to shoot down from a height, which is simply a nightmare for those Turkic nomads who are not wearing heavy armor. Just a few people to operate. It can completely suppress the rain of arrows of hundreds or thousands of Turks. However, this can only be done if you are well prepared, and if the logistics are not enough, you will be forced to stop.

"General Li, how's it going?" The artisan leader asked.

"Excellent! This can be said to be the only firearm that can be put into actual combat at present, everyone thinks about it during this time. How to increase the barrel life of that Flying Thunder Cannon, so that we can produce it in large quantities. If it is still such a short launch life, then we don't have to produce it at all. Li Junxian said.

"Okay, General Lee, we'll do our best. However, General Li, if this rocket is as you say, it must be like a rain of arrows! It took a few of us two quarters of an hour to build this rocket, and that's the reason for the journeyman. If it's those new hands, I'm afraid it will take longer. If there is a war, will there be enough consumption? The leader of the craftsmen was still worried.

"That's what I'm going to say next, you go to the gunpowder workshop and see how they make gunpowder." Li Junxian said.

Li Junxian then took these craftsmen to the gunpowder workshop and let them see what the legendary assembly line production was. At present, the gunpowder production method used by Li Junxian is assembly line production, and Li Junxian's tea and bone china are produced according to the assembly line method. After the assembly line production is adopted, not only is the speed at least ten times faster, but the effect of secrecy is also much better. Now, the key bone china technology and roasted tea technology can only be known by the directors of several core parts of Li Junxian's industry. As for gunpowder, Li Junxian didn't tell anyone about the formula and the entire production process, even Li Shimin didn't know this. Li Shimin also didn't realize the importance of firearms, so he didn't ask Li Junxian to provide the formula.

"This is assembly line production? It's much faster. Moreover, we can also produce swords in this way, so our production efficiency will be a lot. Even, we were able to use one person as a dozen people. General Li, this is a very good method, don't you mind if I teach it to the craftsmen of the Ordnance Prison, right? The artisan leader asked.

"Yes, but you have to pay attention to the difference between their weights and measures, we have another set of weights and measures here, which is more accurate than our daily ones. You have to bring this weights and measures with you to be able to use this assembly line. Li Junxian said.