After Fang De, a famous general of the border army, commanded the Yulin army, Lin Yuyan once again fell into the embarrassing situation of having nothing to do.

However, looking at Shanglin Yuan, whether it is an official or a civilian, they are all busy in full swing, and it is not good for him to be idle.

Especially when he learned that Shangshu Mansion had reached the point of forgetting to sleep and eat, Lin Yuyan was even more difficult to be lazy.

Thinking about it, Lin Yuyan set his sights on the foundry on the left bank of the Tang River.

Nowadays, this foundry, because Shanglin Yuan needs a large number of iron farming tools, the blacksmith shop is built.

Lu Feng, the original blacksmith shop in Miyang City, moved over with some people first.

The foundry director is also a very talented person, even the expert ironsmith Lu Feng came to cast the iron-striking furnace for it.

Lu Feng came over this time, and he also brought a few. Good news.

First, after more than 1,000 people and half a month of exploration, another mining point of the Miyang Iron Mine has been found, and it is buried under the surface of the earth, which is very easy to mine.

The second is that the three iron-making blast furnaces built in the iron-making base not far from the Miyang Iron Mine are already producing molten iron and forging iron embryos, and the speed is more than three times faster than usual.

Now, the Yulin Army has sent more than 100 soldiers to organize the 2,000 people who had opened the Miyang Iron Mine in advance to carry out large-scale iron smelting.

Now the task of the foundry is to cast a large number of iron farm tools, and as for the weapons of the Yulin Army, they were pushed to the spring by Lin Yuyan.

The drawings drawn by Lin Yuyan are not complicated, and with a little pluck in the hands of a master like Lu Feng, he will be completely clear.

For example, the [bellows] drawings that Lin Yuyan took out today.

Lu Feng pondered this [bellows] for a long time before he looked at Lin Yuyan and asked, "Your Highness is saying that this kind of thing can replace the blast tube?!" ”

Lin Yuyan nodded, he also knew this pneumatic tube, it was a copper tube about several feet long, when the fire in the iron furnace was burning, it was to stretch this copper pipe into the furnace, and the person blew at the other end, so as to increase the temperature in the furnace.

However, this method is stupid and bad, and its disadvantage is that the wind power of the blast pipe is small and uneven, and it is not very beneficial to iron forging, and the other is that this thing is really not very safe, once you gasp, the hot temperature in the furnace can easily break a person's throat.

Therefore, even the master craftsman Lu Feng rarely uses this thing.

Seeing that His Royal Highness took out the drawing of this [bellows], Lu Feng was also quite curious, and immediately asked people to build one according to the words of the sixth prince.

This was followed by a hole in the existing furnace and a pipe for the bellows.

"Add to the fire!" Lu Feng instructed the craftsman to add fire to the furnace.

After a while, the fire burned the walls of the furnace red.

Lu Feng took a palm-sized piece of iron in his hand, which was a leftover material forged on weekdays, and instructed the craftsman behind the furnace to use the bellows to blow the air.

It was at the moment when the bellows sounded that Lu Feng saw the flames in the furnace quickly soaring, and a scorching temperature rushed to his face.

"Does it really work?!" Lu Feng put down the hand that covered his face because of the fire wave, and threw the slap big iron ore in his hand into it.

Lu Feng breathed, and it could be found that this was the experience of being an old craftsman, Lu Feng's breathing was extremely even, and it seemed that each breath took the same time.

One, three, three...... Seven breaths!

In just seven breaths, Lu Feng saw that the outside of the iron piece was slowly turning red, and in normal times, when it reached such a hot temperature, it would take at least twenty breaths!

Eight, nine, ten...... Twenty-six breaths!

At the twenty-sixth breath, Lu Feng stretched out the iron tongs in his hand, grabbed the burned red iron and took it out.

The reddish iron that was burned in this way was already the first time that it could be forged.

And in normal times, it would take at least nearly 100 breaths to get to this point!

There is no doubt that the [bellows] taken out by His Highness is really useful.

Throwing the red iron block caught by the pliers in his hand into the ash pool, Lu Feng asked in a deep voice, "Where is Your Highness?!" ”

A craftsman replied, "At the bronze smith's shop." ”

Lu Feng nodded, recently, he had discovered that His Royal Highness the Sixth Emperor seemed to have a special understanding of the art of casting.

At that moment, Lu Feng groaned and walked towards the bronze shop.

In the bronze smith's shop, Qi Xian asked, "What does Your Highness mean by using stencils to cast small round copper plates?" ”

"Well, is it difficult?!" Lin Yuyan asked.

Qi Xian thought for a while and replied: "It's not difficult to cast a small round copper plate, but according to what His Highness said, the front and back are engraved on the front and back, and the inlays are clear, this is not easy." ”

"Can it be done?!" Lin Yuyan asked.

Qi Xian thought for a while: "Your Highness, the second brother Qi Sen has a lot of research on bronzes, if it is him, there must be a way not to row him from the Hundred Workshops." ”

Hearing this, Lin Yuyan nodded, now that the foundry is newly built, the hundred workshops still have their own missions, such as Ma Jun, Qi Sen and other masters have not yet been transferred: "We will discuss it when the foundry is built." ”

At this time, a series of footsteps sounded behind him, and Lin Yuyan looked back at it, it was Lu Feng.

"Lu Feng has seen His Highness."

"Hmm......" Lin Yuyan nodded, and then asked, "The bellows experiment is over?!" ”

"Hmm," Lu Feng nodded, and then said, "As His Highness said, after using the bellows, the furnace temperature has been greatly increased!" ”

"Hmm......" Lin Yuyan nodded, he had already expected this result.

"Your Highness doesn't seem to care?" Lu Feng also asked rhetorically.

"It's just that the furnace temperature has been raised to make the iron burn red faster, so what's there to care about......" Lin Yuyan replied as well.

When Lu Feng heard this, he also sneered in his heart, insiders and outsiders saw it differently, but His Royal Highness Gongzi Yan is a child, and it is normal for him not to know about wrought iron.

At that moment, Lu Feng couldn't help but say excitedly: "Your Highness, not only to make the iron burn red faster, Your Highness, the increase in furnace temperature is of great benefit to the wrought iron!" ”

"Oh?" Lin Yuyan looked back at Lu Feng and said, "You say yes." ”

"Wrought iron by furnace fire, two by forging, three by quenching, among them, furnace fire is the first step, but also the most important step, the best wrought iron technology in Daqin today is nine wrought iron, and His Royal Highness is commonly seen is five wrought iron, as for the Central Plains wrought iron technology is developed, can reach more than ten wrought iron, legend has it that the land of Wu Yue is even more harmful, has reached the realm of thirty forged iron!"

"Wrought iron? What kind of doorway is this?! Lin Yuyan asked, he didn't know much about wrought iron.

Lu Feng explained: "This step of each wrought iron is to first burn the iron red, repeatedly beat to a certain extent, and then quench, this step is called [a wrought iron], each time after the wrought iron, it is weighed, if the weight is reduced, it is considered a wrought iron success, counted as a wrought iron, if there is no reduction, it can not be regarded as a wrought iron success, five wrought iron is a successful wrought iron five times, and so on, seven wrought iron, ten wrought iron, and even twenty wrought iron are the same. ”

Lu Feng paused, continued: "Every time it is forged, there are fewer impurities in this iron, correspondingly, the weapon cast is harder and harder, the most famous forged iron technology in the Central Plains is South Korea, once the border army captured the broadsword of the Korean people on the battlefield, and it has reached the realm of fifteen, so the world often says, [The land breaks the cattle and horses, the water intercepts the birds and geese, and when the enemy is the enemy, the iron curtain is cut into the armor] refers to the broadsword in the Korean army! ”

"Hmm......" Lin Yuyan asked, "If the furnace temperature increases, the number of forgings can be increased?!" ”

"Of course!" Lu Feng nodded heavily, and then explained: "In the past, the biggest restriction on the number of forgings was the furnace temperature, and now His Highness has taken out a sharp weapon such as a bellows, thinking that we can also reach more than ten forgings, or even twenty forgings, it seems that it is not impossible to ......."

"Then why is South Korea able to have fifteen forging skills?!" Lin Yuyan also asked, it is true that South Korea does not have such a sharp weapon as bellows.

Lu Feng thought for a while and said: "The structure of the iron furnace in South Korea seems to be different, it is very easy to gather temperature, and furthermore, the material of the primer of the Koreans is also different, and it is a thing called [Black Stone], as for what it is, the Koreans are very strict, and it has not been leaked, so it is unknown." ”

【Blackstone】

As soon as Lin Yuyan heard this name, combined with its identity as a primer material, he knew what it was......

Coal!

It should be coal, and the temperature of coal burning is indeed higher than that of wood.

Thinking of this, Lin Yuyan nodded, there must be coal mines in Daqin, but it is unrealistic to find them in a short time, so he only wrote down the matter, and then looked at Lu Feng and asked, "What about the land of Wuyue, what about their thirty forgings?!" ”

Hearing this, Lu Feng deliberately explained: "Your Highness, I would like to make a special note that although the Han people have now found fifteen forging skills on the battlefield, it does not mean that the Han people have only mastered fifteen forging, maybe they also have twenty forging, but it is time-consuming and labor-intensive, and it cannot be used in the army on a large scale." ”

"But the land of Wu Yue is the best time and place, and there are many famous craftsmen, but it can make the twenty forging skills applied to the army on a large scale, among which the famous craftsmen of the Wu country, Mo Xie, are all forging iron masters, they use the fire of heaven and earth to condense the iron embryo and forge it, and the peerless sword cast by it can be cut even if it is twenty forging."

"The fire of heaven and earth?!" Lin Yuyan was surprised by this name.

"Hmm......" Lu Feng nodded and said: "Wu Yue barren mountain, every time before the rainstorm, the thunder splits into the mountain, and a pond somewhere in the mountain goes to ignite the ground fire, which can be endlessly for decades, Wu Yue's famous iron forging craftsman is using this to forge iron, and the sword he makes is beyond the reach of even the iron forging skills of the Central Plains!" ”

"Thunder and fire?!"

These five words suddenly popped up in Lin Yuyan's mind.

Lin Yuyan knew that this might be the barren mountains of Wuyue land, where there were many gas outlets or oil and gas outlets, and thunder and lightning could be ignited when they were sent to the fire, and if there was no accident, this kind of gas or oil and gas ports could burn for decades without a problem.

It seems that this wrought iron bottom fire is best with gas and oil and gas, followed by coal, and firewood is the second.

As soon as he thought of this, Lin Yuyan felt that oil and coal and other things were too far away from now, and after thinking about it, the bonus of the bellows should be able to make up for the gap with the Korean iron forging skills, at most, starting from the fire-gathering structure of the furnace, it may not be impossible to catch up with the Jin Han clan.

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

Nowadays, the weapons in the Yulin 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 with this hardness.

Therefore, Lin Yuyan's temporary armament plan for the Yulin Army was only placed on the [Bow Crossbow], because the bow and crossbow did not need much iron, and the territory of Daqin 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 Ge spear and long sword, Lin Yuyan planned to wait until after the first lunar month, 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 Yulin Army was Lin Yuyan's national disaster against the southern border of Great Qin, which would break out soon.

These days, Shanglin Yuan has received a lot of people from the southern border of Great Qin, and some of them are directly from the Deng State who have fled here, and they have also brought Lin Yuyan news about the [Red Turban Army].

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, Tate, Gu, Sui, Tang, Zeng and other Hanshui Zhuji 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 [Beiwang Army] led by Beiwang Miquan, and the other is the West Road [Shouwang Army] of Shouwang Huanyu, in terms of specifications, the Beiwang Army is a little higher than the Shouwang Army, but both are the elite divisions of Jingguo, and the performance of the Shouwang Army is still a little more eye-catching than the Beiwang Army on the battlefield of Deng.

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.

Daqin 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 the crossbows are not popular among the border troops of Wuguo.

Lin Yuyan compared the difference between the crossbows of Daqin and the Koreans, and found that the crossbows of the Wuguo were inferior to the Koreans in terms of material selection.

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 took a look at the disassembled Daqin crossbow and the Han 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 the central mechanism of the crossbow must be applied to iron to ensure that the explosive force saved by pulling the wheel teeth will not impact the crossbow body, whether it is the Korean crossbow or the local crossbow of Daqin, 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 rotating the gear is only three percent of the force of directly pulling the winding crossbow teeth, and it is not easy to hurt the hand.

However, due to the current forging technology of Daqin, 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 herself: "Let's call you [Divine Arm Crossbow] as an expectation!" ”

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 merge the Hundred Workshops and the Foundry as soon as possible, and let him take the drawings of the decomposition of the Divine Arm Crossbow to Lu Feng and other craftsmen to build it, and then experiment separately.