Bright Sword starts with the grenade flat.

Chapter 37 Shaped armor-breaking bullets inspired by firecrackers
  With the emergence of tanks, steel boxes with thick defenses, during World War I, anti-tank weapons also emerged.

In addition to tanks being able to use tank bombardment, it is also a problem for individual soldiers to fight tanks. The early individual anti-tank weapons were anti-tank rifles.

This kind of anti-tank rifle is also very simple. It simply increases the caliber and strength of the longer barrel to increase the penetration of the bullet and penetrate the tank.

However, with the improvement of engine technology, the armor of tanks is getting thicker and thicker, and the anti-tank rifle used by individual soldiers has no solution. After all, there is a limit to the recoil that ordinary people can withstand.

Fortunately, with the emergence of shaped armor-piercing projectiles in the latter part of World War II, tanks are no longer an invincible myth in the minds of ordinary infantrymen.

From recoilless anti-tank guns, to anti-tank rocket launchers, to anti-tank grenades, the armor-breaking principles used here are almost the same, that is, the Monroe effect, or the energy-gathering effect of explosives. The existence of this magical phenomenon makes it possible for armor-piercing bullets, rocket launchers, and recoilless rifles to hit tanks.

The Monroe effect is also called the concentrated energy effect. It is a law discovered by the American Monroe in the explosives experiment in 1888. After the explosive explodes, the explosive products basically move outward along the normal line of the surface of the explosive under high temperature and high pressure. Scattered, therefore, after the grooved charge is detonated, a stream of explosive products with high speed and pressure will appear on the axis of the groove. The chemicals released by the explosive explosion will be used within a certain range. Can concentrate.

Of course, the most important thing is that the manufacturing process of this armor-breaking bullet is much simpler than that of an anti-tank rifle. Compared with the ultra-long barrel processing of an anti-tank rifle, the shaped slope armor bullet only requires a metal cover and a Conical metal inner dimension.

And there are no such high precision and strength requirements as gun barrels. In this way, Liu Xiu can use sand mold casting to use brass to produce this thing, just like Liu Xiu produced his brass silencer in the clothing factory. It's that simple.

However, although Liu Xiu knew very well how to make shaped armor-piercing projectiles, it was difficult for Liu Xiu to tell this matter openly. After all, he was only a nine-year-old child now, and How come you know this Monroe effect if you have never studied abroad?
  Just when Liu Xiu was thinking about how to explain the energy-gathering effect of gunpowder to him in a reasonable way, there was an explosion that woke Liu Xiu up from his thoughts.

Liu Xiu looked up and saw a few children aged seven, eight or ninety playing with a firecracker!

Seeing this scene, Liu Xiu also knew that the Spring Festival was coming. Although it was decades apart, the custom of setting off firecrackers during the New Year has not changed. However, this is reasonable. After all, the custom of setting off firecrackers during the Spring Festival has been passed down for a long time. How can it be so easy to change things over the course of thousands of years?

Of course, there are still a few days before the Spring Festival. Liu Xiu, the group of children in front of them, doesn’t need to think about where they came from. Just like Liu Xiu when he was a child, he secretly stole a bunch of firecrackers, then dismantled them one by one and put them away. chant! Since it was Chinese New Year, my parents turned a blind eye and wouldn't pursue it too much, as long as they didn't go too far.

Just as Liu Xiu was looking at the group of children recalling the past before he time traveled, a child suddenly ran over and took Liu Xiu's hand and said:

"Brother Liu, let's set off firecrackers together! It's so fun!"

As the child spoke, he handed a handful of firecrackers in front of Liu Xiu and motioned for Liu Xiu to play with them.

In fact, the reason why this child is called Brother Liu Xiu is naturally because Liu Xiu has become someone else's child in the eyes of these children's parents.

For example, if a child is disobedient or does something wrong, the parents of other families will say, look at Liu Xiu, who is about the same age as you and can go to the battlefield to kill Japanese soldiers, etc., but you can't do anything. if.

However, after Liu Xiu saw the firecrackers in the child's hands, he immediately thought of a way to come up with the gunpowder energy-gathering armor-breaking theory in an honest way.

Liu Xiu immediately took the firecrackers from the child's hand and said to the child: "It's so boring for you to set off firecrackers like this. Today I will make a powerful firecracker for you to see!"

After that, Liu Xiu took apart several firecrackers in three strokes, gathered all the gunpowder inside together, and then used firecracker paper to make the gunpowder into a big firecracker.

It's just that the bottom is not sealed with soil as before, but paper is rolled out into a hollow and conical shape and then inserted into the bottom of the big firecracker.

Then Liu Xiu took this large firecracker and said to several children:
  "Do you believe I can blow through this wooden door with this firecracker?"

Regarding Liu Xiu's question, these children naturally shook their heads in disbelief. After all, this wooden door was only one inch or three centimeters thick. If you wanted to blow it through, let alone Liu Xiu's hand, it was gunpowder. Even if the quantity is doubled, it cannot be blown through.

After all, children like Liu Xiu's hands had never played with large firecrackers, so they naturally knew how powerful they were.

Liu Xiu smiled slightly at the disbelief of these children, then pointed the tail of the large firecracker, which was the cone-shaped horn, at the wooden door, and then lit the firecracker with incense.

bump!
  There was an explosion, and a hole was blown out of the thick wooden door that seemed impossible to be blown through by Liu Xiu's small firecracker.

However, Liu Xiu did not wait for the compliments of these children, but Li Yunlong's roar:
  "Liu Xiu, what are you doing! You are already the company commander of our Eighth Route Independent Regiment, why are you still playing firecrackers with the children! You are really embarrassing our independent regiment!"

Liu Xiu didn't care about Li Yunlong's anger. Instead, he smiled and said to Zhao Gang and Li Yunlong who came for inspection:

"Captain, Zheng Xi, I'm not just playing with firecrackers. Look, a hole was blown through such a thick door panel. Doesn't that mean something!"

Regarding Liu Xiu's words, Zhao Gang fell into thinking, but Li Yunlong said directly to Liu Xiu:

"If you have anything to say, just say it directly. Stop beating around the bush. Believe it or not, I will slap you!"

Liu Xiu did not explain this, but asked the children around him for a few firecrackers, and then made a concentrated armor-breaking version of the firecracker, and the other was an ordinary firecracker with an increased gunpowder dose, and then in front of Li Yunlong The noodles with Zhao Gang were fried twice again.

The armor-breaking version of the firecracker naturally blew a hole through the door panel again, while the other ordinary firecracker only broke some of the skin off the door panel.

Of course, Liu Xiu's entire process of making armor-breaking firecrackers was done in front of Li Yunlong and Zhao Gang, without any concealment.

PS; Chinese New Year is coming soon. If you readers don’t believe it, you can get some firecrackers and some gunpowder to give it a try. You don’t need a copper inner core, just roll a paper into a cone shape. It is guaranteed to be effective. Of course, for safety reasons, don’t do it. When facing people, it is best to set the fuse longer.

(End of this chapter)