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[The following text]

Wu Guo's [Seven Wrought Iron] skills may be able to meet the needs of daily farming tools, but it is far from meeting the requirements for weapon manufacturing in Lin Yuyan's mind.

Nowadays, the weapons in the Wuyang army are the armaments of the border army, and they use the skill of [Seven Wrought Iron], and there is a great need to replace iron weapons such as Ge and spears.

Therefore, Lin Yuyan's temporary armament plan for the Wuyang Army was only placed on the [bow and crossbow], because the bow and crossbow did not need much iron, and the territory of Wuguo produced more mulberry wood.

In particular, in the paving of the straight road from the iron ore mine to the foundry, a large number of aged mulberry wood was found in the primeval forest, and the bow and crossbow body made of this material is excellent in terms of hardness and toughness.

As for the spear and long sword, Lin Yuyan planned to wait until after the end of the year, and the foundry broke through the technical barrier of [Ten Wrought Iron] before building it.

Anyway, Lin Yuyan also came up with the method of mold manufacturing, and he is not afraid of how slow the production of standard weapons is.

After determining the direction, Lin Yuyan wanted to start the development of weapons immediately.

The establishment of the Wuyang Army was Lin Yuyan's national disaster against the southern border of the Wu State that would break out soon.

In the past few days, Shanglin Yuan has received a lot of people from the southern border of Wu Kingdom, and some of them are directly from Deng Guoren who have fled here, and they have also brought news about the [Red Turban Army] to Lin Yuyan.

The old Chu State not only occupied the entire central Yangtze River basin, but also extended the border to the south of the Great River, deriving the allusion of [King Chu Winning the Crown].

In the past 100 years, the state of Chu has adopted the Taoist method of "rule by doing nothing" to cultivate and recuperate, although the nobles of the state of Chu have grasped the authority of the place, but it has to be said that the population of the state of Chu has soared because of this, and to this day, even the state of Chu itself does not know how much population it has, in addition to the fact that the state of Chu does not have a complete household registration system and the aristocracy keeps slaves privately, the large number of people is also an important reason.

At that time, the Yingdu of Chu had 300,000 Chu troops, especially the nobles of Western Chu, who had their own net worth, and gathered nearly a million guards in Yingdu, but they were still broken by Taiping Tiangong's million red turban army.

The reason for this is that there are millions of Red Turban Army, and there are millions of slaves from the people of Chuxi.

It is said that the Red Turban Army broke the Yingdu in a battle, and the corpses killed on both sides piled up as high as the walls of Yingdu, and even the river turned red and went straight to the land of Wuyue.

But in spite of this, the state of Chu lost the capital of Yingdu, lost the west of Chu, lost half of the country, still did not hurt the bones, and now the state of Chu in Shouchun, the capital of Chudong, is still a powerful country in the world, and the 300,000 Chu army that was once lost in Yingdu After arriving in Chudong, it was a comeback with the scale of the newly recruited 500,000 Chu Dong army.

As for the [Jing Chu Heavenly God Zhurong Blessed Country] (referred to as Jing State) established by the Taiping Heavenly Princes of Chuxi, after occupying the Yingdu, he divided the meritorious kings, expanded his power and territory, and has become a country of tigers and wolves that occupy thousands of miles of fertile land in Chuxi and have millions of soldiers.

Jing's expedition to the east and west was nothing more than an attempt to expand its power, so as to annex eastern Chu and restore the territory of the heyday of Chu, and then compete with the princes of the Central Plains.

After all, compared with the rich and multi-soldier Chu Dong, Deng, Wu, Tate, Gu, Tang, and Zeng are all small countries with a population of less than one million, and some small countries directly have a population of about 100,000, so the direction of Jing's conquest is to go north.

The Red Turban Army is divided into leather soldiers and cloth soldiers, leather armor soldiers are equivalent to regular soldiers, and cloth soldiers are slave soldiers, leather armor soldiers often have a bronze leather armor on their bodies, and there is a decent bronze weapon in their hands, but the cloth soldiers are ragged, and even the weapon in their hands fighting on the battlefield is a simple wooden stick.

Compared with the [elite soldier route] that the Central Plains countries pay more attention to, it seems that Jing Guo believes more in [a thousand troops are easy to get and a general is hard to find], and does not attach great importance to ordinary soldiers.

There are two main Jing armies attacking Deng, one is the East Road [North Wang Army] led by Wei Quan, the North Wang, and the other is the West Road [Shouwang Army] of Shouwang Huanyu, in terms of specifications, the North King Army is a little inferior to the Shouwang Army, but both are the elite divisions of Jing State, and on the battlefield of Deng State, the performance of the Shouwang Army is still a little more eye-catching than the North Wang Army.

And if Lin Yuyan wants to restrain the Jing army that wins with [crowd tactics], he must develop long-range attack weapons.

For example, bows and arrows, crossbows are the weapons of choice that Lin Yuyan values, and because of the discovery of a large number of mulberry trees, there is no big problem with the strong bow.

But in terms of crossbows, Lin Yuyan got two or three trophies of the border army through the relationship between Ju and Mao-the crossbows of the Koreans.

The world's best crossbows are all from Han!

The development of crossbows in South Korea, among the princes of the Central Plains is famous, Lin Yuyan is also from the repair of a Korean crossbow test, the Han crossbow can indeed reach a range of 600 steps, most of which are not difficult to imitate, but the iron-smelting technology of the Korean people is indeed developed, in which the suspension knife to the center of the structure of Lin Yuyan has not been figured out for a long time.

However, Lin Yuyan relied on his own memory and referred to the crossbow of the Koreans, and he drew a crossbow structure pattern, among them, the bow arm and crossbow body are made of mulberry wood, the string is made of twine soaked in tung oil, and as for the cardinal, it is nothing more than to pull down the hanging knife, so that the crossbow teeth are shrunk, the string is unhooked, and the arrow is shot.

Wuguo also has crossbows, but compared to South Korea, it is not a little worse, so that the soldiers of the border army feel that the bows and arrows in their hands are good, so crossbows are not popular among the border troops of Wuguo.

Lin Yuyan was surprised when he compared the crossbows of Wuguo and the Koreans, and found that the crossbows of Wuguo were inferior to the Koreans in terms of materials.

Therefore, Lin Yuyan's first step is to carry out the reform of material selection.

As for the second step, it is how to increase the power of the machine, after all, the range of the crossbow is directly linked to the machine.

Lin Yuyan thought about it, the crossbow body needs a greater pull, obviously, this pull is not manpower, but gears, which requires the use of molds to create iron gears, after all, although mulberry wood is hard, but after all, it is wooden, easy to be deformed by force, and it is not as hard as iron.

Thinking of the gear, Lin Yuyan picked up the charcoal in his hand, which was wrapped in cloth for brushing, after all, when it came to composition, the brush was really a little powerless.

The first gear should have a handle, placed on the outside of the crossbow, which is turned by human power to pull the hooked teeth to the back, and for maximum labor-saving structure, three to five gears should fit inside the crossbow......

"No, no, no......" Lin Yuyan shook his head, according to the technology of today's foundry, I am afraid that it will not be possible to make gears as thin as money lips, it is estimated that the size will be larger, plus the turn of the handle, the five gears are more than thirty catties, and the entire crossbow has reached nearly fifty catties, which is not a good thing.

Lin Yuyan thought about it, and could change the body of the crossbow machine to be thinner and call it two gears.

The wound tooth is pulled by a gear to the rearmost crossbow mouth, and the hooked tooth does not bounce forward by the force of the bow arm.

Lin Yuyan drew two sets of gears, and then designed the teeth and crossbow mouth, and then thought about how to use the suspension knife to brake the crossbow mouth to release the strings.

Lin Yuyan looked at the disassembled Wuguo crossbow and the Korean crossbow.

Then I thought that as long as the crossbow mouth was designed in a semi-circular shape, the backward force of the suspension knife was used to brake the crossbow mouth to rotate and release the string.

In this way, the crossbow mouth designed by Lin Yuyan replaces the role of the previous crossbow teeth, and with the upper crossbow teeth, this crossbow has two crossbow teeth.

Lin Yuyan thought about it, this is all right, as long as the design of the two crossbow teeth is reasonable and the division of labor is orderly, it can not only increase the power of the crossbow, but also increase the service life of the crossbow teeth.

As soon as he thought of this, Lin Yuyan found that all the central components of the crossbow must be applied to iron to ensure that the explosive force of pulling the wheel teeth will not impact the crossbow body, whether it is the Korean crossbow or the local crossbow of the martial arts, they are all wound by manpower, but the crossbow designed by Lin Yuyan is different, it is to use the gear to push the winding crossbow teeth to the crossbow teeth that are directly braked by the suspension knife, so that the power of turning the gear is only the strength of directly pulling the winding crossbow teeth, and it is not easy to hurt the hand.

However, due to the current forging technology of Wu Guo, the range of the crossbow designed by Lin Yuyan is estimated to be less than 400 steps, which is still inferior to the 600 steps of the Korean crossbow.

However, the top priority is the uneasiness in the south, and Lin Yuyan can only ignore this.

Looking at the scribbles on the paper, Lin Yuyan said to himself: "Let's call you [Divine Arm Crossbow]!" ”

Then, Lin Yuyan picked up the bronze ruler on the side and began to quantify the size of the design on the paper, after all, it involves gears and some more important things, and the size must be paid attention to, and there can be no too big error.

Immediately, Lin Yuyan summoned Foil Tin and instructed him to take the drawings of the decomposition of the Divine Arm Crossbow to Lu Feng and other craftsmen to build it, and then experiment separately.