On the Dachang original school ground, a target was erected on the long pile from a distance.

Zhang Guanqian, one of Zhang Baobai's sons, stood on the left side of the artillery position with a team of Dingwu Army infantry, and all of them were wearing fine chain mail.

When Gao Yue read it, Zhang Guanqian said that during the victory of Goutouyuan, the armor of the Western Fan Da Lun Shang Jiezan was seized. The armor was green and clean, shining brightly, and could be used to identify the hair and beard. The bows and arrows within thirty steps could not penetrate, and the crossbow arrows within 50 steps could not penetrate. Then, in Yangzhou, the iron officials in Lizhou were imitated. At first, they could not understand the method. Later, after the mouths of several Dongshan slaves, they learned that the secret of the inner layer was repeated cold forging. When the forged iron sheets were forged two-thirds of the original material, it was considered to be completed.

Hearing this, Gao Yue looked at the armor on the soldiers, but saw that there was still a piece of unforged on each piece of armor, so the other cold forged thickness was two-thirds, and only this small piece was still the same thickness, so it protruded and shaped like a chopstick head.

Gao Yue remembered that this was not the "warm armor" forged by Qing Qiang in the later Song Dynasty? The uncold-forged protruding part was just like the warts grown on human skin, so it was named.

"The armor is already firm, so where is the sword of the guard body?" Gao Yue asked.

At this time, several infantrymen stood up and lifted the Pinglong Long Sword and the horizontal sword out. When Gao Yue saw that the blade was sharp and shining with a cold light, he could definitely blow hair and cut off his hair. It was indeed more powerful than the original version.

"This is Su Tiedao." Zhang Guanqian introduced.

Zhang Guanqian further said that this is the method of refining the group. The so-called "sacred" means the mating of yin and yang. In the burning furnace, it is first made of cooked iron to be bent, and then wrapped in pig iron. The two intersect each other. Then the pig iron leaks out rice green in the high temperature (Gao Yue's face turns slightly red), injected into cooked iron, and finally becomes a hard and fine rigid blade to be used to make spear blades and swords, and is always unfavorable on the battlefield.

It turns out that the process of steelmaking is so dirty.

Gao Yue asked, are all swords and weapons made of this kind of steelmaking?

When Zhang Guanqian faced the question of Jieshuai, he didn't know how to answer it for a while.

Gao Yue said earnestly, saying that Changhu assassinated people, relying on the tip of a spear, sword and slashing people, relying on the blade, arrow feathers hurt people, and relying on the piece of cluster head, so just use the key points to make steel. Ordinary steel can be used elsewhere, otherwise the cost of making weapons is too expensive. After all, our Tang Dynasty won by relying on size.

"Good steel is used on the blade", Gao Yue contributed a common saying to the Chinese nation.

On the right side of the artillery position is a team of the Yining Army. They showed Gao Yue the crossbow weapon.

In fact, it is a cluster of arrows of two regulations.

One type is flat and wide, with a thick body that is quite thin, called "towel cluster"; the other type is thin and sharp, called "needle cluster".

The former is convenient for killing enemies without armor or light armor, while the latter is convenient for shooting enemies with heavy armor.

Gao Yue nodded and said that this system of arrow clusters could be extended to Xingyuan, Fengxiang, and generals and shooters could face different enemy groups in the future, and different arrow clusters could be used to attack.

Then Gao Yue walked to the gun position in the middle, which was the new firearm he was most concerned about.

Zhang Baobai and several gunners bowed to Gao Yue, then pointed to the "Tiger's Crane Cannon. Three-Stage" set up on the carriage, and said to Gao Yue: "Under the i-chakra, this cannon is more intense and more convenient than the previous one, and its power is even higher."

“Why?”

Zhang Baobai said that when they were casting cannons, they found that if the cannon body was too short, it would be difficult for the projectile to shoot far away, and the tiger-climbed cannon was not as effective as the crossbow.

Hearing this, Gao Yue nodded, which shows that what kind of short three-eyed gun can be considered a normal firearm? It can be fired from a distance and swung it as a hammer? Then why not just use a caltrop mace? What can you blow and fire a gun and use it as a close weapon? It is often a waste that is not reliable at both ends.

Then Zhang Baobai continued, but if the gun body is cast long, it is difficult to cast, and the other is inconvenient to turn, so the small ones are improved. Use cooked iron to divide it into three or five sections, and the roll is cylinder-shaped, and the thickness is the same. Then use a ladder to connect it, blend it into one, boring and polish it, plug it, and pour it in with boiling water. If there is leakage, it means that it has not passed. If there is no leakage, it is considered to have excellent texture.

The integrated connection is called the female cannon.

The ratio of the female cannon body and muzzle is calculated by the "how many diameters" and is divided into three parts: long, medium and short. The elderly can reach one stone and place it on the horse-faced wall on the city or the earthen mountain in the besieged city. The middle one is half stone and can be set on a chariot with a rotating wheel at a certain angle. As for the shortest one is only one quarter stone, both cavalry and infantry can be portable.

After the mother is prepared, the child cannon is made. The thickness of the child cannon is eight tenths of the female cannon. Cannon shells and divine thunder medicine are placed inside to achieve a tight fit. There is also a support bolt behind the mother cannon. The power generated by the inheritance bolt is shot when the child cannon fires the divine thunder. The support bolt has eyes and is plugged with a log when firing.

Each female cannon is combined with five or six sub cannons to replace the lifting. In this way, the projectiles fired by the sub cannon will be far and fierce through the tube of the female cannon (basic ballistics, that is, why the projectiles shot with a long barrel are long and have strong power), and the sub cannons are put into the tube one after another, and the firing rate is also fast. If the enemy fails to react, our cannon will shoot three or four rounds, and the body of the female cannon will not overheat and deform.

After saying that, the outstanding and outstanding ones gave Zhang Baobai a try and demonstrated the new Tiger Cannon to Gao Yue and everyone.

This is a medium-sized tiger-climbing cannon. The length of the female cannon from the door to the muzzle is about ten times the length of the muzzle, which is the "ten diameters".

The famous gunner suddenly put the child cannon with a carrying handle into the female cannon, and then lit the fire.

"Bang!" The female gun shook very evenly, and a cluster of blue smoke erupted from the muzzle, and then the three layers of fir boards on the long stack were quickly penetrated and shattered.

Then the fired sub-cannon was raised with hot white smoke and threw it on one side. Then it was put into another sub-cannon like lightning, and then there was a violent sound of the cannon...

"This is set up on a chariot and shoots in turn, whether it is a defense or a charge with the infantry and cavalry, which is so powerful!" Gao Yue praised it and expressed his wish to reward Zhang Baobai, Zhang Guanqian and Zhang Guanwan and his son, five hundred guan. He also said that in the future, any innovative ideas for the Kufangmen and military soldiers could submit them. Once this recruitment was adopted, they would immediately reward them.

There were twenty old-style tiger cannons, and eight new-style ones were created. Gao Yue asked the Zizhi to build suitable chariots and turntables to support them in order to fight with the army.

After the test of the artillery was completed, Gao Yue was very satisfied and reached a consensus with the commander-in-chief Tan Zhizhong:
Chapter completed!