The old fisherman ran over like a child, dancing and shouting loudly as he ran. The white beard floating on his chest is like a Taoist whisk. It's just that there is no such thing as dust this year. In the summer, the women wield small whips with a lot of twine to ward off the flies.

"Haha! Master Hou! It's done! It's done! "Every cell of the old man exudes a tone of excitement. Holding Yun Yue's hand and dragging it outside, Zheng Bin smiled helplessly. If it had been another person, I am afraid that it would have been cut in two long ago. couldn't stand the pull of the old fisherman, Yun Yue was dragged into the carriage by force. Until now, he didn't understand why the old guy was so excited about the second spring.

The Nanshan Experimental Field outside Pingliang South City is the only highland outside Pingliang City. Several trebuchets were lined up in front of Yun Yue, and the old man excitedly pointed to the golden round balls that the soldiers were loading on the trebuchets and said, "Master Hou, it's finally out." You see, these are the flowering bombs that the old and the new ones have made. ”

Yun Yue looked at the spherical metal object engraved with latitude and longitude, and looked left and right. It is certain that this thing is not cast iron but bronze fittings. According to Yun Yue's theory, the concave warp and weft lines are specially cast on the outside, so as to ensure that the fragments are distributed more evenly. No, one piece of shrapnel is very large, and the other is very small.

"Fisherman, I remember we discussed. Now the power of gunpowder is not enough to explode the metal. And the power of ceramics is too small, and it is fragile......"

"Don't worry, let's see." The old fisher pulled Yun Yue into the underground bunker and looked out with a telescope. I saw the soldiers put the spherical metal objects into the hanging basket of the stone thrower, ignited the fire, and smashed the hammer. The metal object flew out with the spark, and in a moment a column of smoke rose in the distance. Immediately afterwards, a loud "boom" sound came into Yun Yue's ears.

It's powerful, it's clearly exploded. Yun Yue felt very excited, the tactical value of this thing was simply outrageously high. It's hard to imagine how much damage this thing would do if it were thrown into enemy formation. Not to mention the traditional large infantry phalanx of the Qin army, even if it is the scattered formation of the Donghu cavalry, it will cause huge casualties. And the horse is relatively timid, this loud noise will definitely startle the war horse crazy. In this way, the so-called shock formation no longer exists.

"Haha! It's done! Master Hou, I saw that it didn't work! The old fisherman ran out of the bunker excitedly, dragged Yun Yue into the carriage and went to the bombing site to watch the experimental effect.

A large crater had been drilled out of the blast site, and scarecrows were scattered far and near. Many scarecrows were smashed by shrapnel, and many more were thrown far away by the huge shock wave. Yun Yue carefully examined the scarecrows and took out a lot of shiny shrapnel from their bodies. Each piece was the size of a thumb, and several even had the rods that tied the scarecrow severed. You know, it's arm-thick wood. Such shrapnel hits the human body and will definitely kill people.

"Seeing that there was no Hou Ye, I changed the projectile to bronze. We don't use cast iron, we don't use clay, we use bronze. The so-called copper of Zhongding, copper six tin one. Copper of axe catty, copper five tin one. The copper of the spear, the copper four tin one. "The old fisherman's face is colorful.

Yun Yue understood as soon as she heard it, in order to increase the hardness of bronze in the smelting of the Warring States Period. It is often necessary to add a certain proportion of tin to bronze, and the higher the proportion of tin, the higher the hardness of the utensils, but the higher the hardness, the greater the brittleness. Therefore, the so-called Warring States metallurgy is the process of obtaining a perfect ratio between tin and copper and lead. (Lead is added to release corrosion!) ）

Yu Lao must have improved the ratio of bronze to tin, and tried to reduce the hardness of bronze under the premise of maintaining a certain degree of brittleness. In this way, even the relatively rudimentary black powder of modern times was able to explode such a thin bronze cannonball.

And no matter how soft bronze is, it is metal after all. It is much more lethal than clay fragments, and as long as the wall is thicker, it will not break no matter how far it is thrown.

Yun Yue's eyes were so bright that they were almost shining, the wisdom of the ancients was really not given in vain. Actually came up with such a compromise, with this flowering shell. Not to mention those idiots in Donghu, even the millions of Qin troops themselves have the strength to fight.

"Can this thing be mass-produced?" Yun Yue asked. The Yun family already had a large number of four-wheeled carriages, and even when the army was being reorganized, Yun Yue specially retained a vehicle-mounted trebuchet army. Originally, I thought it was for the siege of the city to smash the city wall, but now I can equip this thing. Forming an artillery unit behind the formation is much more powerful than the jars of fire oil.

"There is no problem with the casting process, but you have to experiment with the thickness of the bullet wall to determine the mold production." The old fisherman smiled and looked at the golden blossoms. This results in an increase in the copper content due to the reduced proportion of tin. This also means that such shells will be expensive. You must know that copper was also used to mint money in the Warring States period. But this is not in the consideration of the old fisherman, since he saw the gunpowder. His ideal in life is to drum up more and more weapons of mass destruction, and Yun Yue thinks that this old guy is a war maniac with a very good spirit of study.

Today is destined to be a day to surprise Yun Yue constantly, and the old fisher pulled Yun Yue back to the front of the bunker. At this time, the soldiers were ready with a large firecracker. Unlike firecrackers, this large firecracker also has many triangular nails hanging around it.

The old man discovered that gunpowder has a characteristic that if it is surrounded on three sides and let go on one side. The gunpowder will erupt in one direction, which will create a great impulse. So the old man came up with this! The old man excitedly picked up a firecracker and said: "After this thing is ignited, it will shoot out by itself, and it will automatically explode when it is more than 100 steps away, and these triangular nails stuck to it will also be scattered all over the ground with the explosion......" Speaking of this, the old man showed a strange smile.

Yun Yue was suddenly startled, this old guy really dared to think about it. The biggest disadvantage of the triangular nail is that it is arranged in advance, and he does not need to arrange it at all, he only needs to spread this rocket-like thing. However, the launch of this branch is not too low.

As soon as he was about to ask, a carriage was driven over. Looking at the six-pack cylinders similar to Katyusha rocket launchers on the carriage, Yun Yue knew that she was Ultra again!

With a wave of his hand, twenty-four rockets came out with sparks. After a dense explosion, the ground was dotted with triangular nails. (To be continued.) )