"Nephew Heng, this is the small cart you want. Look at it, it will soon fall apart. Don't blame me, I'm the hardest wood I've used."

My uncle came to Yang Heng with a full face of complaint, as if he had been ruined by Yang Heng. "There is also the blacksmith Lao Liu, the best blacksmith in your family."

"Hello, Xiao Langjun, I don't know what can be used for villains in this car." Old Liu looked very awesome before coming to Yang Heng's house, but after seeing the heirloom of Yang Heng used, he lost all his aura. You know, Yang Heng used a double hammer, which was made of meteorite iron. It was a pair of hammers made by Yang Heng's ancestors who worked hard to make. Each hammer weighed more than 200 kilograms. Of course, Yang Heng's hammer must be dozens of hammers as ordinary blacksmiths, and even have strength than the air hammers of later generations. Otherwise, Yang Heng's father would not be able to make such a good knife. However, now this hammer was passed on to Yang Heng, not his father. You must know that this is the heirloom of Yang Heng's grandfather, and only descendants who inherited his grandfather's family tree will be passed on.

"Come on, Lao Liu, let me tell you the simplest thing first. However, uncle, there is still your thing here. You have to replace the outer ring of the wheel with a two-inch thick wooden ring, and it must be moderately soft and hard, that is, not too hard or too soft. In other words, when walking on some roads with stone blades, an indentation will appear on the wheel. After that, the indentation will be restored to most of the time. Lao Liu, you need to create two thick iron sheets on both sides of the wheel. You must use this iron sheet to clamp the entire wheel, but the outer ring must be left with half an inch to one inch wide. Let this piece of wood be exposed and also made into a wooden ring suitable for the outer ring to be convenient for replacement. Okay, my request is temporary

That's all, this is done, I'll tell you the others later." Naturally, Yang Heng wanted to use this wood with moderate softness and hardness to replace the rubber tires of later generations. Yang Heng could not make rubber now. Not to mention that there are no rubber trees in this place, even if there are, it is not something that Yang Heng could do now. However, Yang Heng could have someone planted Eucommia ulmoide at this time. All leaves and bark were stored for future development and use. However, at that time, I don't know if these leaves and barks can be used. However, there is another function of Eucommia ulmoide, which is medical use, which allows Sun Simiao to study the medical value of Eucommia ulmoide. However, Sun Simiao should have known this. Eucommia ulmoide can be used as medicine, and it was recorded in the Han Dynasty.

Yang Heng is now very busy. He has to ask about the training in the army from time to time. Some inappropriate training methods need to be gradually improved, and some training methods that are not involved must be added. The most important thing is to improve those three training outlines. With these three outlines, the soldiers' system and obedience ability will be greatly strengthened. No matter which famous general leads him, he will complete the synthesis of his battle formation well.

Also, Yang Heng should pay attention to the construction of cement plants from time to time, and also remind the workers who are under development and make reasonable improvements.

The most important thing is the car in front of him. Yang Heng did not take the car back to his uncle, but kept it. With samples, he would also make improvements at all times. Now he is considering the axle system and the bead bearings should not be thought of. However, the sliding axle of the bearing shell was practiced by Yang Heng on the water truck, proving that this is a relatively suitable wheel axle. I don’t know what to do now. But the only thing to do is to consider dust prevention, because this car has been fighting with the soldiers, so there are all kinds of environments.

"Yes, this can be used as a dustproof facility," Yang Heng suddenly remembered that in his previous life, some early machinery had really seen parts that used felt as an oil seal, so another thing was solved.

Yang Heng waited for a long time before his uncle appeared in front of Yang Heng with Lao Liu again. The car they brought with him was wrapped in a thick layer of iron on other parts except the axles. Yang Heng was really amused and crying.

"I said uncle, and Lao Liu, what are you doing? When did I say that the car needs to be wrapped in iron sheets? Isn't this aggravated the burden on horses? Come, let me tell you, you can add T-shaped iron or angular iron in this place, in this place, these mortise and tenon parts, and in other parts, only those hard wood is enough to support the car, and the attached shelves on it, they do not bear weight, naturally, these can

There is no iron sheet. Also, you bring this model back. This is the frame supporting the crossbow. Add it to this part. There is also this part. Lao Liu, this place needs an iron shaft, and you can also create it. It doesn’t require any steel. As long as it is iron, it’s still more tight. Go and improve it as I said. Next time I need to teach Lao Liu you to make a load-bearing axle." Yang Heng drove his uncle and Lao Liu out again, and asked them to continue to improve the car.

After a long time, my uncle and Lao Liu appeared in front of Yang Heng again. Yang Heng was not idle for this period. He was sorting out the standards for steel smelting. In recent years, Yang Heng discovered that some of the secret recipes made by his ancestors were actually somewhat the same as the No. 45 medium-carbon steel in later generations. How did Yang Heng see this? Naturally, it was seen through grinding and looking at the steel flowers.

Only No. 45 steel is not enough, so naturally, it is necessary to make a qualified axle. In his previous life, Yang Heng learned the ability to use water to simply quench the steel in his hand. He looked at the color of the steel just burned, and then quenched it by immersing it in water. This method of earthen men is not even worse than using computer temperature measurement and quenching. This is also the result of Yang Heng chatting with the old man when he was idle in his previous life. It was also useful in ancient times, but the most important thing is that he has this steel formula.
Chapter completed!