After a moment of sluggishness, a group of men moving rocks and earth swarmed forward, surrounded Xu Chen and started shouting excitedly. Some people rolled up their sleeves to express that they wanted to give it a try.
However, this idea was immediately drowned out by the overwhelming aura of ridicule from a group of men who had just tried it.
Then they tried several times without believing in evil, and found that taunting had a debilitating effect, and no one could successfully push the empty cart.
After stumbling around and bursting into laughter, a group of people looked at the wheelbarrow dejectedly and annoyed.
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"Although they haven't pushed it yet, everyone should have seen that in such a complicated place, a wheelbarrow is very convenient and fast. You don't need to be discouraged. I will now teach you how to push the cart. Come here..."
Xu Chen pointed at a guy who had just failed to push a wheelbarrow, and taught him step by step how to learn to push this completely unbalanced wheelbarrow.
"Remember, pushing a cart is like throwing a spear. You must not compete while standing. The harder the force, the better. Instead, you must learn to use force. When we throw a spear, we must run for a few steps at first, and then take advantage of the trend.
When throwing a spear, it can be thrown far and accurately. The same is true for a cart. When we push forward, the cart will definitely tilt, but we can turn the handle to change the direction of travel and take advantage of the trend to make the cart tilt.
When the strength is corrected, if it tilts to the left, we will move to the left; if it tilts to the right, we will move to the right. Don't try to straighten it with force. Although it looks swaying, it is just like running water meeting a stone. The wheel will easily
When the cart rolls over, remember, when pushing the cart, imagine yourself and the cart as a swimming fish..."
Xu Chen demonstrated and explained at the same time. At the same time, he also asked the students to see carefully and then supported the car beside him and slowly guided him to push forward.
At the beginning, the guy who was studying still fell down with a push, but with Xu Chen's continuous guidance, correction and help, within a few minutes, he was able to advance seven or eight steps on the river beach.
In fact, at this point, even if Xu Chen no longer gives instructions, as long as he practices for a while, he will soon be able to fully master the method of pushing the wheelbarrow.
Other onlookers saw that this guy learned very quickly, and they also watched for a while, and gained some experience. So some people were eager to try it out, and soon a large group of people were covering the mud and rocks.
On the river beach, you started to fight and I started to push.
But this time, there were fewer people making noises, and most of them were giving advice and helping each other. After more than half an hour of making noise, a few of them actually did well.
There are even people who think they are high-energy pushing carts to move soil. Although they collapsed halfway and fell into pieces, the results are still impressive. As long as they continue to work hard and practice for a few more days, they will definitely be smoother than Xu Chen's push.
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The unicycle is a strange thing in the invention and use of tool carts in the world. It was only invented and applied by the Chinese.
The reason is China's unique metaphysical thoughts and concepts.
Ancient Chinese people pay attention to yin and yang and the nature of all things, so they are accustomed to learning and solving problems according to the situation.
The unicycle is a typical tool that uses force. It is different from any traditional mechanical engineering structure, but a magical product born from the idea of transcending mechanics.
Just like Dayu's flood control, many ancient peoples around the world have records of prehistoric floods. Other races either cried helplessly and prayed to the gods or built large ships to escape. Only China controlled floods.
The core of water control is to make the best use of the situation. It is better to dredge than to block. The method of dredging will eventually calm down the flood and save all people.
The emergence and application of unicycles in China has a long history. Even in the high-tech era, unicycles in rural areas are still useful. After all, only unicycles can run happily on narrow mountain roads and field ridges.
In the West, it was not until the Song and Yuan Dynasties that some businessmen finally did some research, and finally found some applications in the mining and construction industries, but it did not become popular on a large scale like in China.
The reason is that foreigners do not understand this ancient and supernatural mechanical principle and are not very good at using it.
With the success of the unicycle, it quickly became the new favorite toy of tribal men.
Not only the group of men who built the courtyard dam had a great time pushing and pushing all day long, but other groups of hunters also rolled up their sleeves and joined in. Even a group of kiln workers couldn't help it and ran over from time to time to join in the fun and push a few times to enjoy themselves.
And during this familiarization process, in just two or three days, many men were already pushing very hard. In groups of two or three, they were walking back and forth at the foot of the mountain and in front of the compound, pushing carts full of dirt.
Running and shouting, the excitement was overwhelming.
A large group of women, children and children also gathered around the construction site all day long to watch the excitement, just like when Xu Chen was a child watching the excavator digging soil, they could watch it all day long without blinking.
For Xu Chen, the success of the unicycle also brought more confidence to his carriage manufacturing. At least the thickened version of the wheel, although bulky, did solve the most difficult problem.
However, in order to accumulate more experience in making carriages and enable a group of carpenters to become proficient in making wheels and using carpentry tools, in addition, at the request of Mu Ba and many men, Xu Chen began the second batch of large-scale unicycle manufacturing.
However, this time the work was divided into three groups.
A group of two carpenters is responsible for making the frame, and a group of three carpenters is responsible for making the wheels.
Xu Chen worked alone, with five apprentices from the smelting workshop, and began to re-smelt the moving rings and axles dedicated to vehicles.
At present, the amount of copper stored by the Jia tribe is about three thousand kilograms, and the amount of lead and tin is also five to six hundred kilograms each. Although he has smelted several furnaces of bronze and made many knives, axes, weapons, tools and other items, in fact, the amount of
Not much. The main reason is that the smelting conditions are too poor. The smelting furnace is too small and the crucible is too small. It can only smelt dozens of kilograms of bronze at a time. In addition, the firewood heats up very slowly. It takes at least seven or eight days to smelt one furnace.
It does not count the subsequent installation and polishing of the cooked items.
Therefore, he can't use up so much copper in a short time. It is not a luxury to use it to make some vehicle accessories. What's more, if the axle ring is worn and damaged, it can be recycled and re-smelted and cast, so it is not a waste.
In fact, Xu Chen also wanted to cast axes, hatchets, even hoes, plowshares and other agricultural tools and some swords and weapons on a large scale, and then distribute them to various tribes to improve the speed of production, life and farming development, but the actual conditions did not allow it, and he was still waiting for charcoal
Burn it out.
The newly dug charcoal kiln was closed and put into use at the end of January.
Although Xu Chen has never burned charcoal and does not know the specific method, his professional knowledge of geology and mining still helps him a lot. At least he knows that burning charcoal must be sealed. As long as the contact with oxygen when burning wood is reduced, in the absence of oxygen,
, the carbon cannot be fully burned. Relatively speaking, the more closed the charcoal kiln is, the more charcoal will be burned in the end, the better.
Of course, this sealing is also conditional, and some air intake channels still need to be reserved. Otherwise, the extreme lack of oxygen will cause the flame to extinguish, and eventually it will burn into some wood core charcoal. When used, not only the firepower is not enough, but also smoke will continue.
Second combustion.
Theory is theory, but in fact, when the charcoal kiln was actually built and fired, Xu Chen could not do anything to help. He could only remind a group of kiln workers to ensure that the kiln fire should not be too strong, and to always seal the kiln door to reduce air.
Input, we cannot let a kiln of hard-cut and hard-cut oak wood be filled with hard and thick oak wood and finally be burned into a kiln of charcoal ash.
This kiln has been burning for nearly twenty days since the ignition of the charcoal. The kiln door was sealed a few days ago and is waiting for the charcoal fire inside to be completely extinguished.
If this kiln charcoal is successful, the speed of smelting bronze will be much faster in the future. Perhaps a furnace of bronze can be melted in one day, and then large-scale casting of agricultural tools and weapons can begin.
At the moment, Xu Chen can only use the most primitive firewood to burn slowly.
And given that weapons-grade bronze can be very strong and durable without the need for lead, it seems that large-scale smelting of lead is of little significance.
But it is a kind of metal after all. Copper-lead alloy can also be very strong and strong, but it is toxic and cannot be used to make knives and weapons for daily use. However, if it is used to make rough benzene accessories such as axles, there should be no problem.
Therefore, Xu Chen plans to increase the use of lead in the bronze of the axle, which will not only save copper and tin, but also turn this harmful metal into treasure.
In addition, lead has very good lubricity. The axle and collar are made of bronze with a high lead content, which presumably has less friction.
However, ideas are ideas and theories are theories. Xu Chen was still confused when he actually started smelting. He could only experiment according to the formula he imagined to verify the most suitable content ratio of copper, lead and tin alloy.
The copper-lead dagger last time was not successful because it was smelted from a mixture of ores. The proportion of copper and lead was completely unclear, and the alloy was brittle and hard. I don't know how it would work when made into an axle, but at least it gave him a little hint.
That is, alloys with too much lead content may be easier to crack.
Therefore, Xu Chen added a little tin to the alloy smelted this time, not only to lower the melting point of copper, but also to balance the properties of the alloy to see if it could improve the toughness of the alloy and make it less brittle and hard.
Fifty pounds of copper, five pounds of tin, and fifteen pounds of lead. This is the alloy ratio for this test.
What followed was a few days of firewood smelting, while Xu Chen and a group of woodworkers made more wheels and frames, while also making molds for axles and collars.