I think that Li Shimin will give it to himself, or because the guards of his village are in charge of Li Ke.

This is what Li Shimin is most assured of.

Is Li Shimin really at ease with himself?

This is not necessarily, Li Jiangshan is in Jingyang's eyes.

He never reassured me.

No matter how well he develops, Li Shimin's persecution paranoia will remind him to guard against everyone.

Li Ke picked up the bow and crossbow again, looked at the bowstring, and said discouragedly: "How can this bowstring be used for training soldiers if it is loose." ”

"Of course, this kind of bow can't shoot far, and your loose power is not transmitted to the arrow, and there is not much power to transmit to the arrow." Li Zheng looked at it and said, "This kind of bow can't be used for hunting. ”

"You still know the bow?" Li Ke said in surprise.

"I don't understand." Li Zheng shook his head vigorously.

Li Ke still looked at Li Zheng suspiciously.

Looking at Li Ke's sad expression, Li Zheng said: "Okay, I moved, I really don't understand the bow, but I have seen a compound bow." ”

"Compound bow?"

"Your father said that we can give us weapons for 500 soldiers, but I didn't say what kind of weapons it is, as long as we equip 500 people, right?"

Li Ke nodded, "That's really the case, according to my father's intentions, there can only be five hundred soldiers with armor in Jingyang." ”

Li Zheng drew the appearance of a compound bow on the ground with a tree branch, and said: "In fact, the compound bow pays attention to a kind of mechanics, and the principle of the bow and arrow is the transfer of power, but this transfer is actually consumed, and if you use the power of ten stones, the power to shoot out may only be three stones." ”

After Li Zheng finished drawing the outline of the compound bow, Li Ke asked curiously, "Is this a wheel on it?" ”

"Yes, the benefit of a compound bow is that it reduces the amount of power that is used to transfer."

Li Ke blinked vigorously, "Sorry, I didn't understand." ”

Li Zheng came to the treasury of the escort team alone and took out a book from the system library, an academic treatise on the development of bows and arrows.

This book contains a detailed history of the development of bows and arrows.

After the advent of muskets in the Middle Ages, bows and arrows became less and less useful.

Slowly became a knockout in the war.

It became an entertainment activity for the pastime of the aristocratic family.

In later generations, bows and arrows had long since become a type of sport.

The bows and arrows of the Tang Dynasty already had the appearance of the recurve bow of later generations.

However, the accuracy and power of the recurve bow are not as great as that of the compound bow.

Bringing a bow from the camp, Li Zheng began to modify the longbow according to the size of the bow in his hand.

Shock absorbers, pulley shafts, separators, bolts.

The backwardness of knowledge is really evil, and Li Zheng spurned the five guys in his heart again.

These gangs only know how to be gentlemen and don't know how to engage in development scum.

Everyone who reads goes to read Lile, who will engage in development.

A complete compound bow can't be made, and in this era when even hardware technology has not developed, you can only make a simplified compound bow.

After drawing the parts, Li Zheng had another headache, and these parts needed iron tools to build.

Then you need a blacksmith, Li Zheng called Dahu, because he is a lieutenant general of the Longwu Army.

There are blacksmiths in the army who craft weapons.

Dahu knew what Li Zheng was going to do, and said with some difficulty: "General Zhonglang, the iron weapons in the army are all used to make weapons, how can they be wasted." ”

"What I do is a weapon, I want to be the most powerful bow and arrow in Datang."

Dahu looked at Li Zheng's drawings and said, "General Zhonglang, what kind of weapon is this?" ”

It was a bit difficult to explain these things to him, and he couldn't let Dahu relay that this was a part of a compound bow.

I'm afraid that if it's not a blacksmith, he can't even understand what a compound bow is.

Feeling the disadvantages of backward knowledge and technology, Li Zheng said to Dahu: "These are all things I want to build privately, and I want to build some weapons for my own use." There are so many strange weapons in this world, do you know a weapon with an iron head on a rope? ”

Big Tiger shook his head, "I don't know." ”

"That's it, build five hundred and send it to me."

"General Zhonglang, this is still inappropriate, if you build one or two pieces, it will be fine, if it is five hundred pieces, it must be approved by the Ministry of War, because the iron material must be given by the Ministry of War."

"I'll do the iron by myself."

"Okay." Dahu said again: "But it's good to ask for a little benefit fee, this is what the blacksmith has to charge, rules." ”

Li Ke also explained: "It's true, the powerful people in the market want to give some benefits if they want blacksmiths to create things, not much, just a few dollars." ”

Li Zheng took out three pieces of silver cakes, "These three pieces of silver cakes should be enough for a hundred." ”

The big tiger pulled the ox cart and took all the 500 pieces of armor in the camp with the iron used to make parts, and recast them.

Li Zheng was sure that even if they made the parts, the blacksmith didn't know what he was building without complete drawings.

"Where's Cheng Chumo?" Li Zheng asked as he looked around.

"I'm back in Chang'an." Li Ke said while eating a piece of cake.

The bowstring of a compound bow is definitely not possible with the current cow tendon.

Compound bows require a bowstring with high strength requirements.

I found some bamboo chips and soaked them in water.

Wait until the fibers of the bamboo slices separate and become thin lines.

The fiber toughness of bamboo is very good.

Wrap around beef tendons for added strength.

In the palace, Li Shimin was reviewing the chapters, and Wang Ding came with a drawing, "Your Majesty, Li is asking Long Wujun to build things." ”

"Is it a horseshoe again?" Li Shimin said without raising his head.

Wang Ding put the drawings in front of Li Shimin, "The blacksmith of Long Wujun can't understand what this is, and says it's like a toy." ”

Li Shimin glanced at the drawings, and he couldn't see any eyebrows.

Wang Ding said again: "It is said that Li Zheng has recast all the armor of the five hundred soldiers sent out by His Majesty, and wants to make this thing, and the people of the Long Wu Army immediately came to report it, and asked Your Majesty to decide." ”

"It's just a few little things."

Wang Ding said again: "According to Li Zheng's statement, 500 pieces of each will be built. ”

"He spoiled the armor I gave him?" Li Shimin smiled coldly and said, "Just do what Li Zheng said, let him go." ”

"Whoa."

After Wang Ding retired, Li Shimin had no intention of reviewing the chapters.

A good 500 pairs of armor, Li Zheng has to reforge all of them.

I don't know if this kid doesn't look down on the armor he gave him.

Or maybe he didn't want to put his part together at all?

I went to see it a few days ago, although those people were just some villagers.

But the training is good.

If Li Zheng doesn't pay attention to it, it's a pity.

For three days in a row, Li Zheng has been making the bowstring of the compound bow.

In this era when there is no high-strength polyethylene material.

If you can make do with it, make do with it.

It is mixed with bamboo fiber, hemp rope and beef tendon and wound to the thickness of chopsticks.

Then there is waxing, the benefits of waxing can increase flexibility and can also increase service life.