For more than ten days after that, Tian Fan went to the craftsman camp every day. Although the annual leave has passed, Liu Bei has no major events there, and Tian Fan is not needed for the time being, so Tian Fan just goes to say hello every day, and then rushes to the craftsman camp, and he goes all day.

In the past ten days of hard work, the crucible steelmaking technology that Pu Yuan has preliminarily mastered can be refined seven or eight times in ten times, which can almost reach the success rate that Tian Fan wants.

After the efforts of several people, the first product of the crossbow machine force element and the supporting steel frame has also been born. Although it is rough, it can still meet Tian Fan's requirements. Ma Jun and Liu Zheng have re-commissioned the crossbow machine according to this steel stress element. Facts have proved that after replacing with steel stressed elements, the overall performance of the crossbow machine has been slightly improved. The rest of the work is debugging!

On this day, after Pu Yuan made another furnace of steel, Tian Fan did not let him continue to build swords, but asked him to build a big piece of iron!

The iron sheet is one foot two inches wide, one and a half feet long, and half an inch thick, slightly arc-shaped. Although the mold was made in advance, this flat shape still took a lot of effort from Pu Yuan.

Wiping the beads of sweat on his head, Pu Yuan was relieved after quenching the iron sheet. He took the iron sheet out of the animal oil, washed it slightly in water, and handed it to the apprentice next to him.

Wiping his sweat again, he said to Tian Fan: "My lord, the construction is complete!" I just don't know, what do you want this for? ”

Standing next to Tian Fan was Zhang Xiang, the person in charge of the armor district, and after seeing the whole picture of the iron piece, his excited hands trembled! Hurriedly took two steps forward, took the iron piece from Pu Yuan's disciple, and looked at it over and over for a while, and then said with excitement on his face: "My lord, cloth bag armor!" ”

Tian Fan smiled and said, "Not bad! It's the bag armor! After that, he shook his head and said to Pu Yuan: "Pu Yuan, I think you have a lot of effort to build such an iron piece?" ”

Pu Yuan nodded and said, "My lord, this thing is flat, with a length and width of more than a foot, so it is naturally difficult to finalize!" ”

Tian Fan nodded slightly, and said thoughtfully: "It seems that it is still difficult to promote it on a large scale!" Shaking his head, he said, "Leave those alone, a few of you, let's go and see how strong this thing is." Well, what I want to know most now is its ability to defend against bows and arrows, let's go, go to the bow and crossbow area. ”

A few people around him nodded, and followed him to the bow and crossbow area.

Experiments have proved that this seemingly simple piece of iron can effectively prevent the accumulation of arrows! The strength is less than five stones, and when the distance is fifty steps, it cannot be effectively penetrated at all. In other words, wearing this armor makes it immune to archers. Of course, this kind of armor can only protect the chest and abdomen and back, and the rest of the parts are white!

Even so, everyone was happy, because this armor was much more effective than the armor that was commonly used today! If you combine it with chain mail or scale armor, and protect the areas that it can't protect with chain mail or scale armor, the effect will be even better!

But the problem also arises, this thing is too laborious to build!

After pondering for a while, Tian Fan's eyes lit up, and he said with a little excitement: "Let's go, you all come with me, let's go to Zhao Lao!" ”

Zhao Shan is in charge of the carpenter area, specializing in all kinds of carpenter's work!

Although they were puzzled, everyone still followed Tian Fan to the carpenter area.

Tian Fan asked Zhao Shan to find a wheel, and asked him to cut a half-inch-wide hole perpendicular to the rim in the middle of the two spokes on the edge of each wheel. Then, the planks prepared by the rest of the craftsmen were one foot long, half a foot wide, and half an inch thick into the openings, and then reinforced one or two in some way, and a strange-looking thing was formed.

Looking up at the sky, the sky was cloudless, Tian Fan smiled and said excitedly: "Everyone, let's go to the river together!" Pointing to two craftsmen, he said, "Find a gun, put it into the axle of the wheel, and carry the wheel with us!" Those two craftsmen were Zhao Shan's apprentices, and after hearing this, they naturally agreed in a hurry. …,

After speaking, Tian Fan didn't care about everyone's incomprehension, and took the lead out of the second battalion of craftsmen and walked to the river.

The second camp is not far from the river, because the camp requires a lot of water.

In a few moments the people came to the river. The riverbed is very wide, but the river water is very small, Tian Fan does not think there is anything wrong, because the rivers in the north have dry periods, and the water level is naturally very low in winter and spring.

Everyone went down to the riverbed and found a place with water, and under the command of Tian Fan, two of Zhao Shan's apprentices held the barrels of their guns and placed the edge of the strange-looking wheel in the water.

So, something strange happened, the wheels turned wildly!

Everyone's faces were full of surprise, and Ma Jun couldn't help asking, "My lord, why does this thing turn?" ”

Tian Fan smiled and said, "You see, the plank is horizontal, and after the water hits the plank, it will produce a great force. Just like in a turbulent water, it is difficult for people to gain a foothold, the principle is the same. And this force will make the wheel rotate, as soon as the wheel rotates, the next plank will naturally turn into the water flow, and this plank will be hit by the water flow again, so the wheel will continue to rotate, and so on, so as long as there is a water flow, the wheel will keep spinning! ”

Glancing at a few people for a week, he asked, "How?" How does it feel? ”

Everyone was a clever craftsman, thought for a while, understood the principle one after another, and couldn't help nodding. But the next sentence that Pu Yuan said almost made Tian Fan crazy!

Pu Yuan scratched the back of his head, smiled innocently, and said, "Hehe, my lord, this thing is good, when will I get one at home!" Well, when it's okay, it's nice to lie in a rocking chair and watch this thing go around in circles! ”

The rest of the people nodded again and again, and said nonchalantly: "Well, if it is produced by the adult's woodcraft workshop at that time, I will definitely buy a few more!" ”

Tian Fan is crazy, damn, listen to the meaning of these beasts, think he has invented some kind of toy?

Tian Fan couldn't help but burst into foul mouth, he yelled: "Fart, fucking fart!" ”

Everyone was stunned and looked at each other, but they didn't know why they made the adults angry again. Hurriedly bowed his head and admitted his mistake, lowered his eyebrows and pleasing his eyes, Ma Jun cautiously patted the fart and said: "Hehe, my lord, you are a god, we are all ignorant people, naturally we can't appreciate the wonders of this thing, hehe, please explain in detail, so that I can learn things!" ”

The rest of the people nodded again and again, and said nonchalantly: "My lord, let's study hard too!" ”

Tian Fan couldn't cry or laugh, these cattle have all learned well!

Shaking his head, he pointed to the wheel and said, "I'll give it a name, it's called a waterwheel!" ”

Everyone suddenly realized, and Ma Jun chewed the words and said: "My lord, what a good name!" The waterwheel, well, in the water, spins like a wheel, hence the name waterwheel, a good name! Your Excellency is clever! ”

Tian Fan glared at him, and this guy quickly shut up and became a good child. Tian Fan continued: "Do you think I made this thing for fun? ”

Several people hurriedly shook their heads, making a sincere confession, and Zhao Shan even said viciously: "Who? That brute said adults were there to play? ”

Pu Yuan blushed a little, and he also said, "That's it, that guy is really not a thing!" ”

Tian Fan almost didn't choke, this group of guys ...... Just now, Pu Yuan and Zhao Shan shouted loudly!

Adjusting his mood, Tian Fan continued: "You see, this thing can rotate non-stop, as long as the waterwheel is not broken and the water flow continues, it can rotate non-stop!" ”

After a pause, he continued: "Think about it, the waterwheel is spinning very fast at this time, and if you tie some stones to the waterwheel, what will be its speed? ”

Everyone thought for a moment, and Ma Jun whispered, "My lord, will it slow down?" ”…,

Tian Fan nodded, with a teachable look of relief, and said, "Yes, Deheng is right!" But what if we don't tie stones, but some inclined bamboo tubes? ”

Everyone was dumbfounded, they didn't know how to tie these bamboo tubes!

Tian Fan took a few steps to the two craftsmen who were still stupidly holding the barrel of the gun and soaking the bottom of the miniature waterwheel in the water, and said, "Okay, bring the waterwheel up!" ”

The two of them responded stupidly, and at the same time used their strength to carry the waterwheel ashore and put it underground. Tian Fan hurriedly said: "Don't move, just hold it like this!" ”

The two hurriedly stopped their movements and looked at Zhao Shan worriedly. Zhao Shan said: "Listen to the adults!" ”

Tian Fan came to the edge of the waterwheel, squatted down, pointed to the middle of the wooden plank on the edge of the waterwheel, and said, "Look, here, tie bamboo tubes at such an angle!" As he spoke, he looked around, but found no suitable stick, but saw the barrel of a spear more than a foot in length held by two craftsmen.

Seeing that Shi Ah was there, he hurriedly said: "Shi A, cut off a piece of the gun that is half a foot long!" ”

Shi A agreed, and before everyone could react, they saw a flash of black light, and the end of the gun had been broken half a foot long. Shi A picked up the wooden pole and handed it to Tian Fan. After Tian Fan took it, he remembered that there was no rope around him. looked at the clothes on his body, damn, Mi Zhen is a handiwork, reluctant!

Fortunately, Ma Jun reacted quickly, and as soon as he saw Tian Fan's gaze, he immediately tore off a strip of cloth half an inch wide and a foot long from his long shirt!

Tian Fan nodded with satisfaction, took the strip of cloth, and tied the wooden stick to the appropriate position on the waterwheel.

Wiping his sweat, he pointed to the waterway: "Look, tie it at this angle!" ”

Everyone was still puzzled, just nodded stupidly!

Tian Fan said: "You pay attention, this end of this section of the wooden pole, you see, ......" said, he slowly dialed the waterwheel, but the fingers of his left hand kept pointing to the end of the wooden pole! After a while, it was discovered that when the pole was in the lower part of the waterwheel, it was parallel to the ground, and as it rotated, it became tilted, and as it moved upward, its angle became straighter and straighter, and finally, when it reached the top, it became parallel to the ground again!

"You see, if it's a bamboo tube, then when it's under the water, it's going to be filled with water, and as the water moves, the waterwheel rotates, and the tube slowly lifts up, and when it reaches the top position, the water in the tube starts to flow out, and when it reaches the highest point, the water runs out! Think about it, if you use a piece of split thick bamboo to make a water diversion channel in this position, then the water that the bamboo tube lifts up from the bottom of the water will flow along this water diversion channel! If you connect a few more sections of channels made of bamboo tubes, the water will flow farther and farther! Or, after this section of bamboo, into the channel on the ground, what do you think? ”

After a pause, he continued: "Of course, we don't have so much bamboo here, and we can also use wood that has been hollowed out after splitting it instead!" ”

With a smile, he looked at a few people and said, "Understood?" ”

But when I saw them, one or two still had dumbfounded expressions!

Seeing Tian Fan looking at him, Ma Jun smiled awkwardly and said, "My lord, what you said is right, but ...... I still don't understand! ”

Tian Fan was stunned for a moment, and couldn't help but say dejectedly: "I said so much, why don't you still understand?" After a pause, he said, "The height of this wheel is only about five feet, but it can raise the height of water by three feet. ”

After speaking, he didn't speak anymore, just looked at Ma Jun and the others expectantly.

Several people frowned one by one, and did not speak for a long time. Tian Fan is getting more and more anxious, these people are usually quite capable, why are they stupid now?

Suddenly, Ma Jun exclaimed, this guy trembled with excitement, and said silently: "My lord...... I...... Next...... Villain, understood! ”…,

Everyone couldn't help but be stunned, Ma Jun was stupid? How did you become a "villain" after a while? Especially Pu Yuan, he knows Ma Jun's arrogant temperament, and there are only about a dozen people in the world who can be called "sir" by him willingly! Therefore, he used to call Tian Fan "adult", and calling him "adult" means that he admits that Tian Fan's status is higher than him, but he does not admit that Tian Fan's ability in tactfulness is higher than his own! But why is it that all of a sudden, he is obedient?

Ma Jun didn't care what others thought, he took two steps back, bowed to Tian Fan to the end, and said in a deep voice: "After the end of the school, I entered Ma Jun, and I have seen Mr. Tian!" Sir is truly a man of God! ”

Tian Fan smiled and said, "Deheng, you don't have to be like this!" Hehe, since you understand, then you explain it to everyone! ”

Ma Jun nodded respectfully and said, "Ladies and gentlemen, Mr. Tian's invention is of great significance!" Think about it, if this thing is five zhang high, then it can raise the water level by more than three zhang or even four zhang! In times of drought, or where the difference between the water level of the river and the cultivated land is too large, how much wasteland can be turned into fertile land? ”

Shaking his head slowly, he continued: "I'm afraid, no one can say it well!" ”

When everyone heard this, they understood the great significance of the waterwheel, thought for a moment in their hearts, and immediately understood how powerful Tian Fan was. ”

Tian Fan laughed and said, "Everyone, please get up!" Well, Deheng is right, but it's not comprehensive! Think about it, if the waterwheel is big enough, then it will spin very hard! When the time comes, connect its drive shaft to the mill, so that wherever there is water, the wheat can be milled! Make a simple change to it, and you can lick rice, rice, and millet!

"This thing is also very useful for our craftsman camp! For example, if you attach it to a giant sledgehammer, wait for the hammer to reach its highest point, and then pass some traps to make it fall off, then the sledgehammer can fall quickly and be used to strike iron, which works very well! Hehe, just like the iron piece that Pu Yuan made just now, if you use this thing to build, it won't be so strenuous! It can also be connected to the bellows through some mechanisms, so we don't have to worry about blowing the wind! How is it? ”

Everyone nodded their heads again and again, and they were all drunk. The kind of scene that Tian Fan depicted for them, with their ability, is completely possible, imagine it, they feel comfortable!

Can't help it, several people glanced at each other, saluted Tian Fan again, and said sincerely: "Mr. is really a god!" ”