"Ready, pour water, all right, turn up, turn up." As Yang Heng's words fell, Uncle poured the water from a wooden bucket in front of him into the bucket of the model in front of him, and then this bucket had a water valve, through which it would flow into a tank that received water, and the tank that received water was slightly tilted, and then after a sharp turn, it entered a tank that simulated a river channel, and then passed the model of the waterwheel, and began to push the waterwheel, and the waterwheel turned up.

This waterwheel uncle is reduced according to the scale, it can be said that any part will not be missing, especially the bamboo tube is also carved out of bamboo, the carved bamboo tube on the uncle also carved some patterns, in this way, such a waterwheel model in the house will become a beautiful ornament, that is, people need to regularly pour the water flowing into the bottom bucket into the top bucket.

Yang Heng found that there was such a model of a waterwheel in the room, which could play a role in humidification in a room with a fire kang in winter, mainly because the water brought by the waterwheel would collapse into some water mist, which would play a role in humidification.

"This, it's too ugly," Yang Heng suddenly found that this thing can't do this, it has to be made into a work of art, otherwise, how can this waterwheel be sold, in a blink of an eye, Yang Heng thought a lot, this waterwheel naturally can't just be used at home, but also in the whole country, if this technique is passed out, only those big ones can be manufactured, and ordinary people can't buy this kind of waterwheel, then only they can produce it, but they can produce it themselves, and how much can they produce, There is no patent in this era, so Yang Heng has a good plan, first of all, he wants to sell models, and sell models at a high price, and use Uncle's antiseptic formula to make a brand with some good wood, and then use the money from selling models to sell half at a low price and half send a batch of waterwheels to the governments in various places, and then let them sell them to the people to use.

The key to this is that those rich people do not use these cheap waterwheels, they use their own waterwheels, and they must be made according to the model, which will make them very face-saving, although Yang Heng's current ideas are a little rough, but there is still time to say that this kind of waterwheel will not be told before the father reaches a high position, even if it is for his own use, it must be completely closed, so that people can not see the principle of the waterwheel.

"Brother Heng, the model of this waterwheel is very beautiful, how can you say it's ugly?" Niuzi was a little puzzled on the side, and even the uncle looked at Yang Heng to see what Yang Heng thought.

"Why isn't it ugly, do you see what our family can put this waterwheel, I'm going to sell it out, uncle, my plan is that we want to make a part of the waterwheel in the room, because of the relationship between ideas, so each shape of the waterwheel model to make ten, and to carve the number in a conspicuous place, for example, the mountain shape is the green mountains and green water one to ten, or the desert oasis one to ten, temporarily I have the idea of these two models, and then you have to think more, uncle, We still have to come up with some kind of models, and then we need to make a part of the two-meter diameter waterwheel spare, these waterwheels should also have a number, and to make quite exquisite, these are for some officials' gardens to use, naturally also need to have a part of the auxiliary equipment, then it needs to be specially manufactured according to the requirements of various gardens, we are going to start making these models now, and then put them in the warehouse, and when the time is right, we will sell them uniformly, and then next, We're not going to make models. ”

In the blink of an eye, Yang Heng came up with a model of green mountains and green waters, that is, first make a bonsai of a mountain, there will be trees, flowers and grass on the mountain, that is, a bonsai that can be placed in the room that can move, a green mountain, and a waterwheel in the middle just lifts water from a small river that surrounds the mountain, and then pours it into the heavenly pond on the top of the mountain, and the water in the heavenly pond flows into the river channel surrounding the mountain through a limited flow river, and then flows into a hidden bucket of water at the back. This is in ancient times, there is no electricity, otherwise a pump can be added to it to form a cycle, and even the upper Tianchi can be made transparent, making it a fish tank, but now the upper pool can also put fish, but there needs to be a special person to pour the water below into the upper pool at a fixed time, this is Yang Heng's first idea, if you can use the right materials, you can make a very exquisite bonsai.

If the green mountains and green water is a small bonsai, which only occupies a corner in the room, then the desert oasis needs a large site to be able to put down such a large bonsai, which has an oasis and some miniature trees, grasslands, small lakes, and then there are Gobi sand dunes, rivers, rivers flow out of small lakes, after a small drop, push the waterwheel to rotate, and the water raised by the waterwheel flows into the small lake, naturally there is still a loss of water in the middle, and the lost water will flow into a bucket under the dunes. Someone would also pour the water from the bucket into the small lake so that the cycle could be completed.

Imagination is always imagination, one day does not achieve the goal, it is not considered a success, but now the most basic model is the test of success, that is to say, the next can make a home water wheel, in this model the most important component is the central shaft can be used, the central shaft is made of steel, there is a finger thickness of a steel shaft, and then on both sides of each two bearings to buckle the shaft, in the bearing pad after the oil groove, on the top of the bearing there is an oil inlet hole, Yang Heng uses twine to form a siphon on an oil bowl to soak the soybean oil into the oil hole on the bearing, and then buckle a cover on the bowl containing soybean oil, so that the outside world will be isolated from the oil bowl, and the dust will not enter, so that the shaft can be used for too long.

"Nephew, you will need a lot of people to make a waterwheel next, I don't know how you arranged it?" The wood needs to be cut from the woods, because it needs to be made immediately, so after the wood is cut down, it also needs to be roasted and dried, and then it needs to be planed and made according to the appropriate shape, so that cutting trees naturally requires Yang Heng's family of three to cooperate closely, and the drying is handed over to the second uncle, the third uncle and the second aunt, the third aunt and the four people to do it, the fifth uncle and the fifth aunt are to help cut the trees, but the trees that need to be cut are not very many, otherwise the five uncles and five aunts really can't do it. The aunt is to assist the uncle in the production, so that this winter, all the people have something to do, that is, the children are also supervising each other every day to recite Professor Yang Heng's thousand-character text, and after they learn each paragraph, Yang Heng will quickly teach the next paragraph, generally the little lady memorizes it first, and then the girl assists on the side, so that the other children can memorize, what a harmonious five families.