Early in the morning, when the first rays of sunlight shone on the Shanhaiguan weapons test site. Ao Canghai saw this new thing!

It's a kind of ...... with wheels I can't say whether it's a gun or a cannon!

Its caliber is a little larger than a gun, and a little smaller than a gun. The most special thing is that this thing has two tubes side by side. Next to the barrel, there were two huge iron boxes. Ao Ye, who had very poisonous eyes, could see at once that this was loaded with ammunition.

"What is this? We took the train all night, just for this? Although Ao Canghai was very confident in what Li Xiao had come up with, he couldn't understand the thing in front of him.

According to his understanding, the cannon is all about caliber, and the thicker the barrel, the better. If he didn't think about reloading, he would have liked to have a barrel as thick as a water tank. As a front-line general, especially a general who has participated in actual combat, he has a deep understanding of the power of artillery.

In fact, large-caliber artillery no longer relies on shrapnel to kill the enemy, but largely relies on shock waves. Shockwaves are such things that can shock a large living person to death. Even the clothes on your body can be blown off! Many of the corpses on the battlefield were actually naked.

He couldn't understand the cannon in front of him, and the principle seemed to be similar to that of the Makqin heavy machine gun. But that thing can already cover a distance of three hundred to eight hundred meters, and it is better to use a cannon further away. Because if it is too far, it is simply impossible to shoot accurately.

"It's called an anti-aircraft gun, twenty-five millimeter caliber. The old fisherman's letter told me that the theoretical rate of fire could reach 600 rounds. However, the steel we made is not good, and we can only barely achieve 300 rounds. In this way, for every two boxes of ammunition fired, the barrel had to be replaced for cooling. Li Xiao was a little helpless.

Materials science is a basic discipline, and without the accumulation of time, there can be no results. In many cases, materials science research is actually a stroke of luck. If you're lucky, there's a breakthrough in a year or two of research. If you're unlucky, you might not find the right recipe until a few days before you die.

"Two boxes of ammunition have to be unloaded? It's harder than a fucking little girl! Ao Canghai's eyes widened, the battlefield was changing rapidly, and a gun that had to change the barrel of two boxes of bullets. Although the rate of fire is almost twice that of the Maxim, it is not of much value.

"Over the years, you've swapped barrels with little ladies?" Li Xiao looked at Ao Canghai with interest.

"Get down to business!" Ao Canghai blushed rarely.

"This thing is not prepared for earthly things, but for heavenly things." Li Xiao pointed to the huge and bulky airship in the sky.

"That thing? Who else but us? Besides, it's so big that you can see it from afar. When the time comes, the troops should be dispersed, and they should be concealed. That's what the Mongols are doing now, and they used to be able to kill some people with airships. Now it's getting harder and harder to get results with airships. ”

"Yes! These are the truths you said, but the problem now is that Wu Sangui probably already has an airship. Moreover, his airship also uses a gasoline engine that is more powerful than ours but smaller in size. ”

"Gasoline engine? Is that the thing we use for our latest airship? It flew faster and loaded a lot. But it's always easy to break, and it's good to have half of the attendance rate. ”

"England also has talent, they have two universities, Oxford and Cambridge, and they have a steady stream of talent. Li Yongfang said last month that they had brought over a cowman named Newton from London. This guy is very talented, and I don't know what he'll be able to figure out, but I think he'll be able to figure out something that's deadly to us.

Lao Ao! The battlefield advantage is getting smaller and smaller, and we must also be prepared to fight a hard battle in the future. I heard that Wu Sangui is desperately arming the Indians, although those black guys are not very good at fighting. But don't take it lightly! ”

"Yes! In the past, in wars, rocket artillery was invincible. What Jurchen Tartars, Mongolian Tartars all stop cooking. Can ...... now Ay! The Mongols also have rocket artillery, and their guns even use bullets like ours. Fortunately, we still have machine guns, otherwise I don't know what to do when the cavalry rushes over.

It's all Wu Sangui's kid who made trouble, if he knew that this was the case, it would have been better to shoot him early. Speaking of Wu Sangui, Ao Canghai has the urge to cut people. This kid has now grown into the most dangerous enemy of the Ming Dynasty. This danger is not purely military. But in terms of technology and economy, India under his actual rule has become a major force to compete with the Ming Dynasty.

If the Mongols were without Wu Sangui's support, they might not be able to support them for even a year. The increasingly stubborn resistance of the natives of those island countries in Southeast Asia has Wu Sangui's shadow behind them.

"It's useless to talk about this now, let's see the power of this thing." Li Xiao didn't want to talk about this topic any longer, and if he continued to talk about it, maybe Ao Canghai would go to Tianjin and pull Wu Xiang out and beat him up.

If such a thing really happened, Zu Dashou's face would be ugly. That is also an unstable master, once these two goods fight, Li Xiao does not dare to think about the consequences.

The airship in the sky flies steadily at an altitude of about two thousand meters. This is the usual flight altitude of an airship, at which no weapon pair can threaten.

There was a small airship towed underneath the airship, flying more than 300 meters behind it by relying on the wind speed.

Despite his mental preparations, Ao Canghai was shocked by the high rate of fire of the Double 25 anti-aircraft gun. There were more than 1,000 shells in two large iron boxes, and there was actually a line between the front and back. The line shot straight into the sky, forming a very dazzling band of light. I don't know how many shells the airship hit, but at first it was just a sporadic fire, and with the high wind, the flames burned violently.

Almost instantly, the huge airship turned into a huge fireball. The fireball burned in the sky and then fell rapidly. Two thousand meters is enough to drop everything back into the state of parts. If a person falls on that high ground, he will not have a whole bone in his body.

Holding the binoculars and looking at them for a while, Li Xiao nodded. He is quite satisfied with the result. After all, it is not easy to reach this level of what has just been developed. Able to dominate altitudes below two thousand meters, it provides the most basic protection for the team site.

As for the most effective way to deal with airships, for the time being, it is airships. Li Xiao plans to install this kind of double 25 anti-aircraft gun on the latest gasoline-engine airship. With a platform like an airship, the high rate of fire of this thing at high altitudes is a nightmare for all things that currently fly in the sky.

"This bullet will burn?" Ao Canghai suddenly asked.

"Oh, this is an incendiary bomb specially developed to deal with the airship. That is, there is some incendiary agent in the warhead, which is still being gradually improved. It is estimated that after the subsequent development, the power will be stronger. "The concept of incendiary bombs was put forward by Li Xiao.

"That's good stuff! Get me some. Ao Canghai's eyes lit up, and he immediately stretched out his hand to ask for it.

"It's good, but it's expensive. Besides, the 7.62 bullet has such a large capacity. I'll give you an idea, the copper head of the bullet is wrapped in a lead core. You have the soldiers break the copper head a little bit, and the bullet will shatter when it hits the body.

Don't look at just a little bit of lead, it's enough to kill people. The chances of surviving a bullet like that bullet are very small. Even if he survives, it is estimated that he will be the one who lacks arms and legs. "Dum ammunition has been used before, but at that time it was a breech gun, and there was no such thing as fixed ammunition.

Since there was fixed ammunition, there was only one kind of bullet in the Ming army, that is, ordinary bullets with copper heads and lead cores. Mainly because the texture of copper is soft and does not cause excessive wear and tear on the chamber.

The lead core is wrapped inside because, the lead wants to be cheap, and ...... The toxicity is relatively large.