A tricycle, as the name suggests, is a three-wheeled car.

This is not about the number of words in water, it is about objectively and fairly expounding a scientific principle. If you disassemble the three words of tricycle, you will be able to understand the principles and principles of this car!

Yu Zhigan squatted in front of the house, holding the charcoal pen he had made in his hand and wrote and painted on paper. The quill plan was temporarily given up. Yu Zhigan invented it for a long time and found that the quill was not suitable for China. The Chinese paper was too thin, and the quill could be broken with one poked, which was too troublesome!

"Your Highness, are you?"

"Where is creating, don't bother me!"

Yu Zhigan said while drawing that the rough frame of the tricycle is very simple, that is, the three wheels are placed in an approximately equilateral triangle position, and then the two wheels at the rear are connected by an axle. The front wheels are connected together like bicycles, using chains and the axle of the rear wheels, which belongs to the rear-wheel drive vehicle.

However, what Yu Zhigan is facing now is the problem of gears and tracks. Tricycles are not like bicycles, they are used to transport goods, so the requirements for gears are much higher than those for bicycles, so the friction must be reduced.

Yu Zhigan didn't think about steel balls anymore. It was too difficult. It was basically impossible to create steel balls of the same size without precision instruments. What Yu Zhigan has to do now is to invent the chain, and also to tires. The wooden tires are too heavy. One tire is half a car weighs. Don't be exhausted when riding it.

Yu Zhigan was preparing to try the iron steel ring, make the steel ring with iron sheet, then use iron bars to support it, and finally wrap it with a layer of skin on the outside, so that the weight should be reduced a little.

These are all Yu Zhigan's ideas. If you can't do it, Yu Zhigan will add a few wheels to the dustpan under the shoulder pole and push it forward by yourself. As long as it's not a trolley, it's fine. As for whether it looks good or not, it doesn't matter!

"Your Highness!"

Zhu Youxiao watched Yu Zhi do it. If possible, he really didn't want to see Yu Zhi do it. He was an official of the Ministry of Works. Now he was almost a private craftsman in the Prince's Mansion. He had endless work every day. He was doing mahjong and printing a few days ago, and now he had to do bicycles again. Gods all over the sky. What was the prince thinking about in his mind?

"Well, here I'm here, I need you to design a wheel and an axle, that's it, listen to you!"

After seeing Zhu Youxiao coming, Yu Zhigan immediately led him over and began to explain his creativity. Zhu Youxiao could only listen. There was no way, who made him the prince? Zhu Youxiao swears that if he could be the prince in his next life, he would definitely do whatever he wanted and would never be a carpenter!

"Did you understand?"

"I understand!"

Yu Zhigan nodded with satisfaction and signaled Zhu Youxiao to continue to work hard, while he continued to draw pictures. In three days, it would be no problem to build a tricycle!

"How should the car fight be done?"

Yu Zhigan squinted his eyes and thought, "The car fight is the soul of a tricycle. If it is too heavy, the entire vehicle will weigh a lot. In this way, riding a bike will waste a lot of effort.

"Use iron?"

Yu Zhigan couldn't help but grin. This thing is not like modern times, and iron can be seen everywhere. In this era, due to the problem of iron smelting technology, iron smelting has great technical difficulties.

"Use a piece of iron! Or aluminum?"

Yu Zhigan thought about the aluminum thing. It seemed that it had not been used much in ancient China, so it should not be easy to get it. He eliminated this idea. Yu Zhigan thought about the wooden boards and seemed to be OK, but most of the wood used now is hardwood and there is not much softwood. It is not light to use it as a car board.

Soon, several blacksmiths came to Yu Zhigan with fear.

"Caomin, Caomin, I have seen His Royal Highness!"

"Well, are you blacksmiths?"

"Yes!"

Yu Zhigan took out the picture he drew and said, "Can you make iron sheets?"

"Iron?"

"It's just very thin iron, probably as thick as that!"

After Yu Zhi gestured for a while, the blacksmith was stunned when he saw it, staring at the prince in disbelief: "Your Highness, is it such a thin piece of iron?"

"Yes, it's so thin, maybe so big, can you make it?

Several blacksmiths looked at each other, and finally gritted their teeth and said, "Yes!"

"Okay, I'll make these things in two days and leave them to you!"

After saying that, Yu Zhigan thought for a while: "Do you know iron pipe?"

"Is the iron pipe?"

"That's it, there are iron on both sides, and the middle position is hollow!"

Yu Zhigan thought that these blacksmiths didn't know about iron pipes, but they didn't expect that these guys still knew what iron pipes were, but these blacksmiths looked a little embarrassed.

“Why is it difficult?”

"Your Highness, it's not difficult. You only need a hammer and some cooked iron, but the process is quite complicated and requires..."

After hearing this, Yu Zhigan learned how to make iron pipes in this era, which was really troublesome.

You must have cooked iron, beat it into iron sheets, then place it on a U-shaped workbench, then use a hammer to hammer it little by little, wait until the iron temperature drops, then heat it and then beat it again. This will take several times before you can finish the iron.

Yu Zhigan nodded after hearing this. He understood the hard work of the craftsmen very much: "Look for a few more craftsmen to make a steel pipe, and also make some gears, and then..."

After hearing Yu Zhigan's orders, the group of craftsmen took the order and left. Yu Zhigan was relieved, hoping that these guys could complete the task.

"It seems that I want to click on the technology tree, otherwise I can't make any fun things if I want to make some fun!"

Yu Zhigan couldn't help but sigh, but how should he light up the Tang Dynasty's technology tree?"

Gunpowder? Yu Zhigan thought about it for a while. He would definitely know this thing. After all, where is the mantra? Why did he study it? In the early days of black gunpowder, he was just used as firecrackers? Yu Zhigan couldn't remember how to increase its power.

What else? Yu Zhigan thought about it and it seemed that coal could be made. With coal, iron smelting could be improved, and it could also reduce the heating cost of the people of the Tang Dynasty for the winter.

"What else?"

Yu Zhigan patted his head and wanted to take out something more from his head, but no matter how much Yu Zhigan patted his head, he couldn't even shoot it. He couldn't help but sigh again, if possible, he must study hard! Go back to ancient times to improve the technology of ancient China.

"Get out the bike first, and then take a look when you have time. What I need. I'm thinking hard about it, but I don't believe it anymore. I can't compare to a guy with a brain disease!"

After Yu Zhigan talked to himself, he stood up and returned to his room. Yu Zhigan still had a very important thing to do!

In the side hall, Yu Zhigan stared at Lu Bu with a kind smile: "Lu Bu, the fraud case of the imperial examination has been investigated. The results of the scientific examination this year have been cancelled. The enrollment will be reopened next year. What are your plans!"

Although Lu Bu is useless, he is not good at eating or sleeping. The only thing he can help is copying the rules of mahjong and playing cards. Apart from that, he did not do anything he knew, Yu Zhigan decided to keep the guy. There was no other reason, because this guy had a sister named Diao Chan.

"Your Highness! I want to go back to Baotou, hang my head on the beam and thorn my thighs for a year, and prepare for next year's Encore exam!"

After seeing Yu Zhigan, Lu Bu felt inexplicably panic and bowed respectfully, looking at Yu Zhigan with a smile, but his heart began to get confused.

"The prince won't ask me to copy something again, don't let me do it. I've been more than a hundred times saying the text, two hundred times the basic mahjong gameplay, and one hundred times the rules for playing cards. What are he going to do!"

Lu Bu was a little desperate. During this period, he felt that his wrist was no longer his. He felt very painful after touching it a little.

After hearing this, Yu Zhigan's face turned up: "Bu, you know, I am very optimistic about you. It's not your problem if you don't have a gold list title this year, but a scientific examination problem!"

"Thank you for your kindness!"

Lu Bu said this, but his heart was about to collapse. He shouted in his heart, "It's over, it's over, what's going on this guy to do again, what should he do!"

Yu Zhiyao smiled on his face, stared at Lu Bu in front of him, and waved his hand: "I am a little reluctant to let go, and it just so happens that I am also lacking some talents. Why don't you stay in the East Palace?"

Lu Bu lowered his head and his eyes were running around, so he kept himself in the East Palace? He wanted to be a coolie. He must refuse and go home!

Yu Zhigan did not look at Lu Bu, but said to himself: "You want to go back to Baotou. Look at Jiuyuan so far from Chang'an, it will take more than two months to go back and forth. With these two months, you might as well review your homework in the East Palace. If you don't understand anything, you can also ask for advice from the young tutor of this palace!"

When Lu Bu's eyes lit up when he heard Yu Zhigan's words, this was indeed a fatal temptation for a literati like Lu Bu. With great scholars instructing him, his knowledge can make rapid progress.

But soon Lu Bu reacted. If he promised the prince to stay in the palace, he would definitely continue to be a coolie and continue to copy things. How could he have time to review his homework? Thinking of this, Lu Bu said: "Your Highness, your parents are not traveling far away, so you must have a good time to travel. This time, the grass-roots went to Beijing to take the exam and failed. He should go home to visit his parents to fulfill his filial piety..."

When Yu Zhigan heard this, his eyes lit up. There was no reason to ask Lu Bu to bring his family here just now. Now the reason is ready.

"In this way, you don't have to worry about Fengxian. I will send someone to Baotou to take your parents and sister Diao Chan over. What do you think?"

"Ah, Your Highness!"

Lu Bu was stunned. What the hell is the prince doing?

Yu Zhigan didn't give Lu Bu a chance to react, and waved his hand: "That's the decision. I will send someone to Baotou now, so you can stay in the prince's mansion with peace of mind!"

After saying that, Yu Zhigan walked out of the side hall and thought of something as soon as he went out: "By the way, Fengxian, copy five more mahjong rules today!"

Lu Bu: "(??へ??╬)!!!"
Chapter completed!