Vol 2 Chapter 970: bicycle!

Yan Shaoning's old waist had been severely injured, but Mo Lingwei's press made it worse. He only felt that his waist was about to fall apart.
In fact, he wanted to say that he didn't come to save her intentionally, but Mo Lingwei shut his mouth immediately after the second half of the sentence, dispelling the thought of telling the truth.
"Oh! Oh! Oh! How are you, Xiao Ningzi? Are you okay? I...I didn't mean to press you!"
Mo Lingwei hurriedly stood up, adjusted the clothes on her body, and apologized.
"Ahem~!"
Yan Shaoning struggled to get up from the ground, first glanced back at Li Zexuan with a vengeful look, and then smiled at Mo Lingwei: "Uh, it's all right! Wei Er, what is this thing~?"
At this time, he noticed the two-wheeled car stopped by Li Zexuan, and he couldn't help but feel strange.
Mo Lingwei became excited when Yan Shaoning mentioned the car she had just played. She said, "Xiao Ningzi, this is the two-wheeled bicycle that Fu Bo just made. He said that this thing can be pedaled up. I've been practicing this, but I didn't expect this two-wheeled vehicle to suddenly lose control and almost hit you! Fortunately, the mountain leader helped me to stop it!"
Having said that, she patted her chest with fear, and Yan Shaoning blushed and turned her head quickly.
"Haha~! This is called a bicycle~!"
Li Zexuan laughed out loud at this time.
That's right, the second picture he gave Fober before is a bicycle.
At that time, after looking at the drawings, Fu Bo felt that the structure of this thing was quite simple, so he thought that Li Zexuan would be able to deal with him in ten days. But after all, he realized that the bicycle was not as simple as he thought.
A bicycle can be simplified into the body, handlebars, pedals, chain, seat, wheel and brakes.
These basic parts first appeared in 1885, and the inventor was the British Steley.
With his improvement, the bicycle has the basic form of a modern bicycle: a triangular frame, a pedal in the middle, a chain drive, and a brake.
But in 1885, according to the classification of middle school textbooks, it was already modern.
At that time, Britain had established a relatively complete industrial system, and the smelting technology of steel was also becoming mature. It was not difficult to make bicycles.
But now is the Tang Dynasty! The Tang Dynasty when the industrial system was not developed! It is still quite difficult to make one or two bicycles.
The first is the frame. Modern bicycle frames are generally made of steel or aluminum alloy, carbon fiber...cough cough cough, if you use this to ask the ancients, it would be a bit bullying. However, if there are not too many requirements for the strength of the frame, bamboo or wood can be used. It is nothing more than fire prevention and mothproofing. The front fork is more stressed, and cast iron or harder wood can also be used.
The bicycle in Li Zexuan's hands is made of iron.
Next is the wheel. In other words, if Li Zexuan had not crossed over, there would be no expectation to make rubber tires in the Tang Dynasty, because China has a history of planting rubber trees for more than 100 years. Before the reform and opening up, condoms were not enough, and the rich had to wash them. So the wheels can only be made of wood.
But now it is different. Under Li Zexuan's promotion, rubber was introduced to China more than a thousand years in advance. At this time, there was no problem in making a few rubber tires in the workshop.
Fubo not only made rubber tires, but also made an inflator based on Li Zexuan's drawings. The supporting tools were not complete.
The first two things are not difficult, but the next component is the transmission part of the bicycle-the chain. The chain is made up of outer pieces, inner pieces, shafts and rollers. From the perspective of modern people, it is not difficult at all. It is also very simple to make. Stainless steel or carbon steel is punched out by the machine. , Just buckle together.
However, in the Tang Dynasty, steel could only be forged and processed, and hundreds of identical small steel pieces were knocked out with one hammer, which could force the blacksmith's family to hang himself. It is fine to use cast iron, because the molten iron is poured into the mold to ensure that the shape and size are similar, but the strength of the cast iron...Let's say, your iron pot falls eight pieces on the ground, that is cast iron.
As the transmission mechanism of a bicycle, the chain has to bear a considerable pulling force, and the strength of cast iron is obviously not enough. And the cast iron chain has another disadvantage, that is, if it gets wet, it will rust to you in minutes.
So Uncle Fu was worried about this thing for a long time.
Later, he couldn't think of a good alternative, so he approached Li Zexuan to explain the situation. Only then did Li Zexuan know that a simple chain in modern society would have been so troublesome to produce in ancient times. In fact, this problem is not impossible to solve. Just build a hydraulic press machine.
However, hydraulic stamping machine tools require strong hydraulic power. The flow of the river on the Bahe River is relatively flat. To obtain strong hydraulic power ~EbookFREE.me~ requires a large water level drop, then a dam needs to be built for water storage. The amount of work is too great, and it can be done in the future, but now, it is already winter, and the river may freeze in winter, even if he did it, it would be futile.
At the beginning of October, he was still planning to build a generator. As a result, after the incident of cholera and the telescope was delayed, he felt it was too late, because the river was about to freeze, so the drawings of the generators he had drawn could only be temporarily locked. It's in the cabinet.
Regarding the chain, Li Zexuan finally decided to abandon the use of chain transmission because the conditions are not yet mature. He chose to directly install the pedals on the front wheels and change the front wheel drive. This form is already what the Scots did in 1839. Although it is more difficult and easy to fall into the pit, it can be on the road anyway.
As for chain-driven bicycles, because hydraulic press machines are needed, let's wait for next year! It just so happened that he planned to update a batch of professional equipment for the workshop!
Forber got this plan, and returned without stopping to lead the craftsman to transform the bicycle.
After more than half a month, this front-wheel drive bicycle was finally built.
"bicycle?"
Mo Lingwei's eyes lit up when she heard Li Zexuan's words, and said, "The name is very appropriate, bicycle, bicycle, a car that can walk by yourself! Hehe! It's just that Shanchang, your bicycle has only two wheels, but it's not at all. It’s not easy to ride! It’s hard to stand still! I have fallen down several times!"
Yan Shaoning said, "Yes, Xiaoxuan, you said you can't get three wheels? Two wheels are too easy to fall over!"
Li Zexuan smiled and said: "Who said that it is not easy to stand on two wheels? That is because you have not mastered the balancing skills of this kind of car. I will show you two demos later!
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