After making a mud fan and drying it in the shade, at this time, it was already 3 months later. Of course, it wouldn't have taken so much time if he had spent all his energy on making eccentric chakras, but first, he had learned (reviewed?) a lot of middle school physics and mathematics knowledge, and secondly, wouldn't he have learned medicine discrimination with Yao Lao, and it would be very good to be able to live normally.

In the past few months of study, he has been poisoned three or five times, although it is not a major event, but he has to rest for a few days every time. Now, he can use his tongue to distinguish the medicinal properties of common medicinal materials, and he can also distinguish the medicinal soups made of some medicinal materials with obvious characteristics.

His tongue is already extremely sensitive and flexible.

Because of the sensitivity of the tongue, the dishes he made were much more refined, and his grasp of the taste of the dishes was more accurate, but the taste of the dishes was lighter, and Gary and his family, who were used to heavy tastes, were not very used to it.

After the clay fan was ready, Kaichi took the opportunity to sell bread on the street with his parents, took it to the blacksmith, and asked the blacksmith to help him pour it. In order to reduce the weight of the eccentric wheel, he also designed a number of hollowed-out parts on it.

It would be nice if there was an aluminum-magnesium alloy, but it would still be too heavy to use bronze. Unfortunately, no, Kaichi remembers that aluminum is abundant on the earth, and the alum and the clay used to make pottery are compounds of aluminum, but it is not easy to refine. It was not until the 19th century that aluminum ingots were refined, but at that time it was the same price as gemstones, more expensive than gold, and later generators were invented, and with cheap electricity, electrolysis was invented to have the basis for preparing aluminum in large quantities.

At this time, even if someone refines aluminum, Jiayi can't afford it. Even if you can afford it, you can put a large piece of gold on the crossbow, this is crazy, begging for robbery. At this time, the metals used were basically copper, iron and tin, and gold and silver were currencies, not practical metals.

In addition to the eccentric wheel, he also made a pair of shelves for mounting the eccentric wheel on the crossbow. The closer he was to the finished bow and crossbow, the more excited Jiayi's mood became, and after the eccentric wheel and mounting frame that were poured out were ready, he didn't wait for the blacksmith to polish them before coming to pick them up, he directly brought them back and polished them himself.

Over the next few days, Kaichi was polishing the eccentric wheel while preparing the bowstring. It is better to make the bowstring with beef tendon or silk, but unfortunately there is none. The bowstring of Gary's bow is made of twine, which is broken into strands of fiber, and then tied up and twisted into strands. Unfortunately, this bowstring is greatly affected by the weather and is prone to moisture.

He was going to start tying the bowstring again, and it felt so hard, and he had to make everything little by little. If only there was an almighty Taobao, even girlfriends could buy it. As for why you don't use the bowstring made by Gary, because the bowstring of the eccentric wheel bow is three times as long as the ordinary bow, and the bowstring made by Gary is the string length of the ordinary bow. Although Kaichi's crossbow is shorter than a normal bow, the string is still not long enough.

He found a bundle of large hemp, carefully removed the fibers, selected the thinnest, most even, and longest twisted into a strand, and added horsetail hair to it, for this reason, the old horse's tail at home was almost bald, but fortunately he didn't want long enough hair. After twisting, the maw glue boiled out of the swim bladder is used for bonding and reinforcement. All that comes out of this is the strands, and then the three strands are twisted into one strand and glued with a swim bladder, so that a long bowstring is ready.

After a few more days of this, Kaichi finally assembled his bow.

I saw that the purple reddish purple shirt wood was used as a crossbow, the yellowish elm wood was used as a crossbow arm, and the bronze crossbow machine had not been oxidized and rusted, growing a patina, showing a brilliant golden yellow. In addition to the main string at the top of the bow, there are two secondary strings staggered through the crossbow arm at the bottom, which is why the string is longer than the others'. The most conspicuous thing is the eccentric wheels on both sides of the crossbow, like two golden wings attached to the crossbow. In fact, Jia Yi doesn't like this very much, and he is blind when he takes it out, which is not in line with his own low-key style. You should find some darkness.

Jiayi secretly went to the grove for an interview alone, 30 meters away, the arrow directly did not enter the trunk, he couldn't pull it out, and went back to find an axe to dig it out. Although, he was not aiming at this tree, and the target he drew on another tree closer to him was unharmed. The arrow he threw diagonally upwards only shot more than 1,000 steps, of course, because he was still small and his stride was small, which was almost 250 meters or more. Although the ultimate range of modern composite bows exceeds 1000 meters, the materials are different, and the ultimate range is not equal to the effective range. With Jiayi's level, 20 meters away will depend on God's blessing, this is still a crossbow, if the bow can ensure that there is an accurate head within 10 meters, it would be good.

This can only be practiced more in the future.

The biggest advantage of this crossbow is not power, it is labor-saving, as a 7-year-old child, he can pull this crossbow can imagine how labor-saving, although he is a strong child. In order to make it easier to wind, he also installed a hemp rope ring at the front of the crossbow, which he used to open the bow with his feet.

After testing and testing the usability of the crossbow, he went to show off to his buddy. Wealth does not return to the hometown, such as brocade clothes at night, how can there be a lack of envy from friends with good things.

......

The next morning, well, in fact, it was not early, after breakfast, there were only 3 villains left in the family. In fact, it's not a matter of always being like this, there have always been only three children in the family, if it weren't for the two big sensibles, there would have been a problem, and they should have moved to the town to open a store. In fact, Gary has long had this plan, but unfortunately the money is not enough, and he is embarrassed to ask someone to borrow money, plus according to the current profitability, he will probably be able to save enough money in a year and a half.

Kaichi and Donna take Badru and Walker to the forest, saying that they are going hunting.

"Jiayi, what are you bringing us here for? It's so hot. Entering the forest, Walker asked, "You didn't take me with you the last time you found honey." ”

"It was Badru who found it. Look, I'm not going to look for you this time. Let me show you my big baby, which I made recently. Kaichi said.

He took out the cloth bag he was carrying behind him and held it in his hand.

"That's it, open it. Badru said, reaching for the cloth bag in Nagar's hand, "What are you carrying arrows for?"

Donna rolled her eyes on the side, she already knew what it was, but she hadn't seen Jia Yi use it, after all, it was a family.

Kaichi dodged Badru's hand and said, "Okay, I'll let you see it." ”

With that, he opened the cloth bag, revealing the crossbow inside.

When Bardrew and Walker saw it, they were a little shocked, after all, compared to ordinary crossbows, the shape of this crossbow was a bit different.

Badru looked at it carefully, and said, "It's a crossbow, why do you have three strings, and what are the wheels on both sides for?"

"Don't you think it's prettier?" said Kaichi, who didn't know how to explain the eccentric chakra, so he simply classified the devices as beautiful.

Just like a gaming computer must be equipped with brilliant lights, I think that no matter which world is more handsome and cooler, it is the pursuit of boys.

"Did you do this yourself?" Walker skeptical.

Donna listened, and hurriedly retorted: "No, my father made it for him, he made the strings, and the wheels on both sides cost a lot of money." ”

Jia Yi saw a few friends looking at him with disdain, as if to say that you didn't do it yourself, you have to worry about something. He hurriedly said, "Don't underestimate this crossbow, I'll show you the power." ”

After speaking, he pulled the crossbow string, put on the arrow, aimed ahead, only heard a "whoosh" sound, and then "boom~~", and saw the crossbow arrow shoot into the tree more than 10 meters away.