I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

After writing the word waterwheel, Liu Tan froze there.

In his impression, this kind of thing is actually a very good agricultural irrigation tool.

It's just that the greater role of the waterwheel is to reduce the irrigation difficulties caused by the difference in height. In history, it was also used by Kong Ming and his elders in the Shu Kingdom after it was perfected.

The terrain of the Shu Kingdom does require this kind of waterwheel, but the northern border country does not need it, because most of the entire northern border country or most of the cultivated land is in the plains.

So the waterwheel will not be used for a while, and Liu Tan didn't think about it before.

As a result, he never expected that he built the waterwheel not to develop agriculture, but to build a playground for Liu Che.

He sighed, anyway, after Liu Che came, he could tell him the function of the waterwheel, and with the real thing, it should be easier for Liu Che to understand the operating principle of the waterwheel.

It was only when I actually designed the waterwheel that I realized a problem: Even if the swimming pool changes water frequently, it is actually stagnant water, which means that the water in the pool will not flow.

In the inherent impression, most of the waterwheels are driven by water flow, but the pool does not have this condition.

Because the pool has a swimming function, the canal cannot be repaired outside and the waterwheel can be driven by the hydraulic power of the Yellow River. In that case, it will bring unfiltered Yellow River water, so what is the use of filtering it?

Thinking of this, Liu Tan couldn't help but sigh, don't think about hydraulic drive, then the only choice is probably animal drive.

There are two options for animal power drive, one is a traditional wheel-shaped waterwheel, and the other is a keel waterwheel.

The so-called keel waterwheel is that there are scrapers and water buckets in the middle of the whole waterwheel. Flow out from the water bucket, so as to achieve the purpose of leading the water below to the top.

Because the shape of this kind of waterwheel resembles a keel, it is named keel waterwheel.

In fact, most of the earliest keel waterwheels were manpower, including treadmills and handcarts.

Liu Tan doesn't really want to use human power, but it is impossible to transport the cattle to a height of more than ten meters and walk in circles on it with animal power.

Don't worry about the problem of cattle transportation, whether the cattle station is so high or not is also a problem.

In this case, although the keel waterwheel is suitable, it will not work.

Then the traditional waterwheel needs to find a suitable driving force for it.

Liu Tan thought about it for a while, and it seemed that it was not very difficult. The wheel-shaped waterwheel can also be used to move the wheel by using the continuous meshing of the gears to transmit the movement.

It's just that its cost may be several times that of a keel waterwheel.

But the problem is that Liu Tan doesn't need to keep the cost down as much as possible. If it is used by ordinary people, then needless to say, the keel waterwheel is definitely better.

But he wanted to build an amusement park for Liu Che, among other things, the most important thing was to look good.

From the perspective of Liu Tan's aesthetics, the wheel-shaped waterwheel is still more beautiful.

Not to mention anything else, looking from a distance, a round wheel standing there spinning continuously looks spectacular.

It's a pity that animal power is also limited, otherwise Liu Tan would have to make a Ferris wheel.

As for where to arrange the gears and how to maximize the beauty of the waterwheel, Liu Tan said that these are not things he needs to consider. Raising soldiers for a thousand days and using them for a short time, at this time, the Gongshu family needs to step in.

In fact, the Gongshu family has not been idle recently, and has been cooperating with Xu Lin.

Although the main achievements of their family are in mechanism art, water conservancy mechanism is also a direction of their research.

So Xu Lin couldn't make up his mind in some places, but the Gongshu family could provide answers.

Many people find the cooperation between these two people very strange, but Liu Tan is very calm.

It's just that the Gongshu family just sent a few little guys out to follow Xu Lin to gain knowledge and provide help, but Gongshu Can stayed.

The reason why he stayed was because he was worried that something would happen if His Royal Highness the King of the Northern Territory needed them to be absent.

According to Gongshucan's knowledge, the Mohists are also discussing sending people to the northern border country because the public losers are doing well in the northern border country.

Thinking of Gong Shucan here, he felt angry, they had already avoided the edge and did not move around in Chang'an and other places where there were many Mo family members, and in the end the Mo family wanted to kill them all.

The Mo family also has a sense of crisis. The King of the Northern Realm is not an ordinary vassal king. He has too much influence on the Emperor and the Crown Prince, especially after hearing that this time he has sent another jade mine to the Prince. His father is filial, and he has a deep brotherhood with the prince. One sentence from him may be worth many words from others.

What if Liu Tan was coaxed by the Gongshu family to make him happy that day, and he would say something nice for the Gongshu family in front of the emperor, and what about the Mo family?

Although the Mo family seems to be doing well so far, in fact no one in high position is willing to endorse them.

If the public losers please the King of the Northern Territory, their replacement of the Mo family will be imminent.

Not to mention that the King of the Northern Realm seems to have some experience in organ skills. It is said that many things that the Gongluojia has done recently were ordered by the King of the Northern Realm, and even gave the Gongluojia the blueprint.

Even if the Mo family doesn't care about their own status, they still want those blueprints!

Gong Shucan felt more and more dangerous, but what the King of the North has been doing recently has nothing to do with mechanical techniques, and his craftsmen can handle it.

Fortunately, he finally had a place to use his skills. The moment Gong Shucan received the task, he tried his best to make the waterwheel look better.

However, the power transmission method of the waterwheel has basically stipulated a lot of things, so no matter how fine it is, it will be a surprise from the details.

Gong Shucan’s final choice was to draw patterns on all 24 wooden spokes of the waterwheel, and then all the patterns of wooden spokes formed a huge... panda head when viewed from the front.

Fortunately, Gongshucan did not directly make a waterwheel, but made a model.

After all, a waterwheel is about ten meters high. If you really do it directly, it will be difficult to adjust if something goes wrong. The most important thing is that Gong Shucan also feels that he needs to ask his highness. His Highness gave it to him. He had never seen this kind of thing before, and he was afraid that it might not be well done.

So when Liu Tan saw the water wheel with the panda's head painted on it, he felt a little bad, especially when he saw the water wheel turning and the huge panda's head spinning up and down, he couldn't help but took a deep breath and asked, "Why?" Remember making this pattern on the waterwheel?"

Gong Shucan said cautiously: "I think the pool designed by His Highness also has this shape, so I just... want to echo it."

Liu Tan was silent for a long while, looking at the rapidly spinning panda's head, he felt a little pain in his head, sighed and said, "Change it."

The most is to paint the pattern on the edge of the wooden spoke, but the wooden spoke itself is not too wide. In the end, some lines are drawn with gold powder on the central axis and the edge. It is not a special pattern, but it looks better from a distance. .

However, I have to say that apart from the patterns, Gongshucan did a good job in making the waterwheel. At least the model worked without any problems. He even made the entire water park according to the drawings given by Liu Tan.

Liu Tan glanced at the sand table and found that the water park was indeed similar to what he had imagined.

Originally, he still wanted to separate the slideway from the pool.

But I don't think that's necessary. After all, when Liu Che is in a kayak, no one will play in the water so blankly.

The entire slideway is not directly above the pool, but a little to the side, and only the water inlet at the bottom of the slideway is connected to the pool.

Liu Tan admired the sand table, and finally couldn't help pointing to the stairs on the slide and asked, "What is this?"

Gong Shuchan said strangely: "Stairs, don't you want to slide down from the top? Do you have to go up the stairs?"

Liu Tan was taken aback for a moment, only then did he realize that he seemed to have overlooked a very important issue - the height of the stairs.

The height of the slideway is not low, about ten meters high, which means that this height requires Liu Che to walk up by himself, and this height is basically the height of a four-story building.

Think about it, his father has to climb four floors to play a water sport. If he wants to play twice more, he has to climb four floors a few more times.

At that time, there is no need for others to protest, and Liu Che may be the first to roll up his sleeves to deal with him.

Liu Tan looked at the stairs and said slowly, "Don't use the stairs, change it."

Gong Shucan originally thought that the stairs were not suitable, so he heard that he carefully asked, "Then... what are you using?"

Liu Tan originally wanted to build a spiral ramp for people to lift Liu Che up, but he felt unsafe. Of course, the most important thing was the load-bearing and construction period issues.

If you want to make a solid ramp, it should not be too steep. If it is not steep, it will occupy a large area. Even if it has iron bars and concrete, it will take a long time.

Moreover, it is necessary to ensure that the person who lifts the sedan chair is stable enough. If it is not stable enough, if it overturns, it will be a major accident.

Liu Tan looked down at the slide and frowned.

It was rare for Gong Shucan to see him so worried, and he couldn't help but worry for a while whether Liu Tan would cancel the project.

After all, if there is no way to go up, there is no need for the slide as a game item, and the waterwheel... seems to have no need for existence.

You must know that the waterwheel has been there since the beginning to provide water flow for the slideway.

Gong Shucan racked his brains and couldn't come up with a solution, but he still gritted his teeth and said, "Please give me some time, Your Highness, so that I can come up with a better solution."

Liu Tan subconsciously asked, "What can you do?"

Gong Shucan was asked by him, and he just wanted to fight for it. Of course, the way was unexpected.

The means of transportation are nothing more than manpower and animal power. Human power is dangerous and animal power is also dangerous. The most important thing is that those livestock are not light in weight, and load bearing is also a big problem.

Liu Tan looked at him and smiled and said, "I have a solution, but I don't know if it can be realized."

Gong Shucan immediately said: "Your Highness, just say it, I will try my best to do it!"

Anyway, His Royal Highness the King of the Northern Territory never imagines anything out of the ordinary. Even if the things proposed are difficult, there are ways to solve them. There will be no situations that cannot be completely solved, let alone difficult solutions. Otherwise, how can we show that the Gongshu family is useful? Woolen cloth?

So the current Gongshucan is not afraid of difficulty, but simple!

Liu Tan looked at him and said slowly, "Elevator."