Kaichi reworked the frame and carved the anti-gravity runes he had selected and redesigned on the frame.

In fact, it should be said that painting, because this circle of his is just a spectacle, and it has no practical effect at all. He was not capable enough to realize the rune circle he had designed for the time being.

It seems that it was because of Jiayi's redesign of the circle that he couldn't realize himself, but in fact, he couldn't realize this circle no matter how streamlined it was.

He carved the rune array, knowing that he couldn't achieve it, so he filled in the silver line in the pattern, which looked a lot more gorgeous. Now that he has money, he has a lot of luxury in using materials, and in the past, he would not embed silver wire in the grain anyway, at most it would be good to embed copper wire or tin.

It's not that he didn't want to ask Imu to do him a favor, but Imu called it a good name - exercise.

After remaking the new frame, he finally remembered what he had forgotten, the last time he went to his teacher to ask about the alternative material of rubber, but he was interrupted by his teacher, and he actually forgot about it, and instead went to remake the frame, and also designed a rune circle, wasting several days.

He rediscovered his teacher and asked the question again.

"To be elastic and wear-resistant, can't animal tendons?" asked Imu.

Although he asked, he was not satisfied with this answer, it was impossible for Jia Yi not to even know such a simple and common material, and the reason why he came to ask was definitely not satisfied.

Jiayi felt a little disappointed: "Teacher, the tendons are not wear-resistant enough, and I use a large amount of tendons, so it takes too much material." ”

Although the tendons of animals are very elastic, the wear resistance is too poor, and if you make tires, the amount of demand is too great to be collected. Moreover, animal tendons are not like rubber, which can be burned and re-plasticized, and can not be inflated at all when used to make tires.

However, Jiayi's wheels didn't want to be designed to be inflated, firstly, the material was not up to par at all, and secondly, the tightness of the tires was still a problem, and it was too inconvenient to inflate, so he wanted to replace it with solid tires.

Isn't the shared bicycle in the previous life just the solid tires used?

"What the hell do you want to do? Isn't it to add elasticity to the top of the hinge?" the last time Imu interrupted Kaichi, and then he ran away and went back to design the new car, but Im didn't even know what he was looking for this material for.

"It's mainly covered on the surface of the tires, so that you can reduce bumps when riding," said Kaichi. ”

"That's a good idea. "This method can actually be used on all wheels, but the materials you need are not easy to find." ”

"Teacher, do you know if there is any way?"

"I remember I once saw a paper that Eucommia gum can be extracted from the bark of the Eucommia ulmoides tree by diluting it 1500 times with Amphelotta No. 7 extractant with water, you can try it. ”

Amphelotta series extractants are a series of extraction solvents invented by Master Amphelota, which can be extracted from plants, animals and even metals, and even No. 11 can stratify liquids, claiming to be able to extract liquids.

Amphelotat series of agents not only has a wide range of extractions, but also has excellent results. If it weren't for the special needs, the average mage would use the amphelotta series of extractants for the extraction of active ingredients, which is already the most versatile extraction solvent among mages.

With this, Mage Amphelota became one of the wealthiest groups of mages, and held the title of Master Extraction, claiming that there was no ingredient that he could not extract.

"Teacher, where can I buy the potion? and the eucommia tree, I've seen a few, but it shouldn't be enough, right?" With a direction that could be tested, Kaichi began to worry about the raw materials again.

Imu said: "I have seen a forest of eucommia trees, that is, the last time we set out to venture into the forest, there was a forest of eucommia trees on the right on the way, and it is estimated that there are hundreds of them, which is enough for you." However, I think it's better for you to find an alternative method first, make the car first, and it is not a matter of a day or two to extract the appropriate glue. ”

Im actually makes a lot of sense, even if a substitute for rubber is found, it will not be a matter of a day or two to make a tire. Even if you use a fully solid tire, you should adjust the wear resistance properties of the outside of the tire and the elastic properties of the inside, not to mention how good the adjustment is, at least it must have a significant effect, and it is more inconvenient to install "rubber" tires on Sparta.

Kaichi decided to make the tires first and finish the prototype.

It's just that wheels without tires can only be called wheels, not tires.

Because the road surface is not too good, and Kaichi still has the dream of riding home from the lime pine valley, the wheels are designed to be relatively wide. In fact, the wide wheels are a little more strenuous to ride, but they have better grip on dirt roads and are less likely to sink into the road.

The production of wheels is more troublesome than the frame, firstly, the production of a large number of wheel spokes, which must be made thin enough, tough enough, and the length must be consistent.

The whole car is made of enough materials, and if you don't want to find a way to reduce some unnecessary weight, you won't be able to ride without asking Im to enchant the frame. Can you believe that the whole steel bicycle is not loaded with wheels, and the weight is close to 30 kilograms?

The main reason is that the thickness of the steel pipe is not easy to control, and he didn't have a B number in his heart when he made it, and then the weight exceeded the standard.

The only thing that can be comforted is that unless people in this world are malnourished, their physical fitness is much better than that of people in previous lives, and he himself is too.

After making the spokes, it was to the outermost steel ring, although in order to ensure that the outer ring was round enough, Jiayi made some efforts, but compared to the final bearing, it really is nothing.

In order to make a good bearing, Jiayi not only needs to grind the balls very round, but also has to make steel with high and uniform hardness and wear resistance, as well as high elastic limit, and the most important point is that it cannot rust. If there is any problem, it will cause strenuous riding and easy damage.

In order to solve the problem of bearing steel, Jiayi tried several methods, adding various other metals to the steel, or carrying out carburizing operations, but unfortunately the results were not ideal. After all, he was a programmer in his last life, not engaged in material science, and being able to make steel is already considered a serious study, plus the popularization of novels.

In the end, Imu has to be found.

Im offers a new material, chrome silver, which is not silver, but only because it has the same color as silver. It is a very hard metal, and although it is not as hard as adamantite, it is much cheaper than adamantite.

Adamantite is not only hard, but also very good at guiding demons. Therefore, although chrome silver is only slightly softer than pure gold, the price difference is tens or nearly a hundred times.

With chromium silver, Jiayi mixed it with steel to make chrome steel, which was then carburized - thanks to the popular science program, this is still learned in the popular science program through the program of making swords.

After this treatment, Jiayi finally got the suitable steel, and then the obtained steel cutting, forging, grinding, quenching, polishing and other processes before finally making balls one by one, and finally making bearings.

He also reserved grooves for the inner and outer tubes to be installed in the back of the wheels, and in order to protect the grooves from being broken, he embedded a layer of cork in the grooves.

Fortunately, with the help of magic, these things can be made quickly, otherwise, it is estimated that the children will be born, of course, there must be a girl first.

Through this car, Jiayi obviously found that because of magic, many things in this world are more convenient, but at the same time, the fine processing of materials is very insufficient. Of course, it is probably due to the lack of productivity, and Jiayi's requirements are relatively high.

After doing this, Kaichi can finally assemble the first car of his own in his life.