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

This is not in the number of words in the water, this is an objective and fair exposition of a scientific truth, the tricycle of the three words disassembled, everyone can understand the principle and principle of the car!

Yu Zhiqian squatted in front of the house, holding the charcoal pen that he had been making out of his hand to write and draw on the paper, the quill plan was temporarily abandoned, Yu Zhiqian invented it for a long time, and found that the quill pen was not suitable for China, the Chinese paper was too thin, and the quill pen would break when it was poked, so troublesome!

"Your Highness, what are you?"

"What about creation, don't bother me!"

Yu Zhiqian said while drawing, the general framework of the tricycle is very simple, that is, the three wheels are placed in a roughly equilateral triangle position, and then the two wheels behind are connected with a shaft, and the front wheels are the same as bicycles, connected together with the axle of the chain and the rear wheel, which belongs to the rear-wheel drive vehicle.

However, what is now in front of Yu Zhiqian is the problem of gears and tracks, tricycles are not like bicycles, they are used to pull goods, so the gear requirements are much higher than those of bicycles, and friction must be reduced.

Steel balls Yu Zhiqian doesn't want to, it's too difficult, in the absence of precision instruments, it is basically impossible to create steel balls of the same size, what Yu Zhiqian wants to do now is to invent chains, and there are tires, wooden tires are too heavy, a tire weighs half a car, don't get tired to death when riding.

Yu Zhiqian is going to try the iron steel ring, make the steel ring out of iron sheets, then support it with iron bars, and finally put a layer of skin on the outside, so that the weight should be reduced a little.

These are Yu Zhiqian's ideas, if you can't do it, Yu Zhiqian will add a few wheels to the dustpan under the flat shoulder, and you can push it forward by yourself, as long as it's not a wheelbarrow, as for whether it's good or not, what's wrong with him!

"Your Highness!"

Zhu Youxiao looked at Yu Zhiqian, if he could, he really didn't want to see Yu Zhiqian, he was an official of the Ministry of Industry, and now he was about to become a private craftsman in the Prince's Mansion, and he was busy every day, he was engaged in mahjong and printing a few days ago, and now he is going to engage in bicycles, all the gods in the sky, what is the prince thinking in his head?

"Well, here it is, so I need you to design a wheel, and an axle, that's it, you can tell you!"

After seeing Zhu Youxiao coming, Yu Zhiqian immediately pulled him over, and then began to explain his creativity, Zhu Youxiao could only listen, there was no way, who made him the prince! Zhu Youxiao swore that if he could be the prince and emperor in his next life, he would do whatever he wanted, and he would definitely not be a carpenter!

"Do you understand?"

"Understood!"

Yu Zhiqian nodded with satisfaction, and motioned to Zhu Youxiao to continue to be busy, while he continued to draw, there are still three days, and it shouldn't be a big problem to make a tricycle!

"What should I do with the body?"

Yu Zhiqian squinted his eyes and thought, this kind of thing is the soul of the tricycle, if it is too heavy, the weight of the whole vehicle will be very heavy, in this way, riding a bicycle will waste a lot of strength.

"With a tin sheet?"

Iron sheet, Yu Zhiqian couldn't help grinning, this thing is not like modern, iron sheet can be seen everywhere, in this era, because of the problem of iron-making technology, there is a great technical difficulty in iron sheeting.

"With an iron plate! Or with aluminum? ”

Yu Zhiqian thought about this thing, as if it had not been used much in ancient China, it should not be easy to get, and this idea was ruled out, Yu Zhiqian thought about it for a while, and it seems that the wooden board can also be used, but most of the wood used now is hardwood, not much softwood, and it is not light if it is used to make a car board.

Soon, several blacksmiths came to Yu Zhiqian tremblingly.

"Grass people, grass people, I've seen His Royal Highness the Prince!"

"Well, you're blacksmiths?"

"Yes!"

Yu Zhiqian took out the picture he drew and said, "Do you know how to play iron sheets?" ”

"Ironhide?"

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

After Yu Zhiqian made a gesture, after the blacksmith saw it, the whole person was stunned, and stared at the prince in disbelief: "His Royal Highness the prince, is it such a thin piece of iron?" ”

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

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

"Okay, I'm going to get these things done in two days, and I'll leave them to you!"

After finishing speaking, Yu Zhiqian thought for a while: "Do you know how to use iron pipes?" ”

"Iron pipes?"

"That's it, iron on both sides, hollow in the middle!"

Yu Zhiqian thought that this group of blacksmiths didn't know about iron pipes, but he didn't expect that this group of guys still knew what iron pipes were, but this group of blacksmiths was a little embarrassed.

"How is it difficult?"

"Your Highness, it's not difficult, you only need a hammer and some wrought iron, but the process is more complicated and requires ......"

After Yu Zhiqian heard this, he knew how to make iron pipes in this era, which was indeed very troublesome.

It is necessary to have wrought iron, beat it into iron sheets, and then put it on a U-shaped workbench, and then use a hammer to hammer it little by little, wait for the temperature of the iron to decrease, and then heat it and beat it again, and so on many times, before the iron can be beaten.

Yu Zhiqian nodded after hearing this, he understood the hard work of the craftsmen very well: "Find a few more craftsmen, make a steel pipe out, and make some gears out, and then ......"

After hearing Yu Zhiqian's order, this group of craftsmen took the order and left, and Yu Zhiqian breathed a sigh of relief, hoping that this group of guys could complete the task.

"It looks like you need to click on the tech tree, otherwise, you won't be able to do something fun!"

Yu Zhiqian couldn't help but sigh, but how should he light up Datang's technology tree? “

Gunpowder? Yu Zhiqian thought about it for a while, black powder himself will definitely do it, he still understands a little bit about this thing, after all, where is the formula, why did he study this thing? In the early days of black powder, it was only used as firecrackers, right? How to increase the power, Yu Zhiqian can't remember clearly.

What else? Yu Zhiqian thought for a while, as if coal could be made, after having coal, ironmaking could be improved, and it could also reduce the heating cost of the people of the Tang Dynasty in winter.

"What else?"

Yu Zhiqian patted his head, wanting to take out a little more from his head, but Yu Zhiqian couldn't shoot his head no matter how much he patted his head, and he couldn't help but sigh again, if he could, he must study hard! Go back to ancient times to improve ancient Chinese technology.

"Let's get the bike out first, and then I'll see when I have time, what I need, I'm trying to think about it, I don't believe it, I'm not as good as a guy with brain disease!"

After Yu Zhiqian muttered to himself, he got up and went back to his room, Yu Zhiqian still had a very important thing to do!

In the side hall, Yu Zhiqian stared at Lu Bu with a kind smile: "Lu Bu, the fraud case in the imperial examination has been investigated, the results of this year's scientific examination have been cancelled, and Enke will be reopened next year, what are your plans!" ”

Although Lu Bu is useless, except for eating, sleeping, the only thing that can help is to copy the mahjong rules and poker rules, other than that, he didn't do anything he knew, but Yu Zhiqian still decided to keep this guy, there is no other reason, just because this guy has a sister named Diao Chan.

"Your Highness! Weichen wants to go back to Baotou, head hanging, taper stabbing stock for a year, and prepare for next year's Enke! ”

After Lu Bu saw Yu Zhiqian, he panicked inexplicably, bowed respectfully, and looked at Yu Zhiqian with a smile, but his heart had already begun to mess up.

"The prince won't let me copy anything again, don't put it, I've already said the text and explained the words a hundred times, two hundred times the basic mahjong game, and a hundred times the rules of playing cards, what is he going to do!"

Lu Bu was a little desperate, during this time he already felt that his wrist was no longer his own, and he felt very painful when he touched it slightly.

After Yu Zhiqian heard this, his face turned straight: "Bu, you know, this palace is very optimistic about you, and the lack of a gold list title this year is not your problem, but a scientific research problem!" ”

"Thank you, Your Highness!"

Lu Bu said this with his mouth, but his heart was already about to collapse, and he yelled in his heart, it's over, it's over, it's over, what kind of moth is this thing going to do, what should I do! “

Yu Zhiqian had a smile on his face, stared at Lu Bu in front of him, and waved his hand: "This palace is a little reluctant, and it just so happens that this palace is also short of some talents, why don't you stay in the East Palace?" ”

Lu Bu lowered his head, his eyes fluttered, and let himself stay in the East Palace? Let yourself be a coolie, you must refuse, you must go home!

Yu Zhiqian didn't look at Lu Bu, but said to himself: "You want to go back to Baotou, you see that Jiuyuan is so far away from Chang'an, it will take more than two months to go back and forth, there are two months of time, you might as well review your homework in the East Palace, if there is anything you don't understand, you can also go to the young master of the palace to ask for advice!" ”

Hearing Yu Zhiqian's words, Lu Bu's eyes lit up, this is indeed a fatal temptation for a literati like Lu Bu, with the guidance of Confucianism, his knowledge can progress rapidly.

But soon Lu Bu reacted, if he promised the prince to continue 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 opened his mouth and said: "Your Highness, your parents are not far away, and you must have a way to travel, this time the grass people entered Beijing to catch the exam, and their names fell to Sun Mountain, so they should go home to visit their parents and fulfill their filial piety......"

When Yu Zhiqian heard this, his eyes lit up, there was no reason for Lu Bu to bring his family over just now, and now the ready-made reason was right in front of him.

"In this way, Fengxian, you don't have to worry, this palace will send someone to Baotou to pick up your parents and sister Diao Chan, what do you think?"

"Ah, Your Highness!"

Lu Bu was stunned, what the hell is the prince doing?

Yu Zhiqian didn't give Lu Bu a chance to react, and waved his hand: "It's decided like this, the palace will send someone to Baotou, and you can stay in the prince's mansion with peace of mind!" ”

After finishing speaking, Yu Zhiqian walked out of the side hall, and just after going out, he thought of something: "By the way, Fengxian, copy five more mahjong rules today!" ”

Lü Bu: "(•́へ•́╬)!!! ”