The plow has been created, but at this time only Yang Heng had great confidence in this plow. The father, even my mother, and uncles all had no idea about this plow, and they still had the same statement. People who are not professionals cannot understand the professional knowledge.

My father and uncles are not experts in farming, so they are naturally not so catching a cold about this kind of pear. However, when my uncle heard Yang Heng talk about the water truck, he was very interested. This is mainly because my uncle is very fond of carpenters, and the carpenter tools that Yang Heng made for drawings, which is quite cherishing.

These woodworking tools are recorded that the first piece is a long bench for woodworking. This is the most important tool for hand-made woodworking. On a nail on the panel of the long bench, a piece of iron with sawn teeth can be fixed. As long as these loose parts are placed on the long bench, these loose parts can be finished.

Then there is a woodworking saw, which means installing a saw blade on one side, a tight rope on the other side, and a long saw blade for two people.

Next are some small tools, such as palladium, wood chisel, and other handmade woodworking tools that Yang Heng saw in later generations. These simple tools were used by carpenters without electric woodworking beds when Yang Heng came here. The things were very simple, but they were very practical and efficient. In order to polish these tools, my uncle went out to find some sandstone as whetstones.

When his uncle became familiar with these tools, he fell in love with them crazily. Sometimes he used wood to make various wooden tools in the main hall of Yang Heng's house all day long. However, according to Yang Heng's view, his uncle's imagination was average, so he could only be a good craftsman, and he could not carry forward this career. This may be a limitation of knowledge, or he still needed to bring some talent, but his uncle did not have both aspects.

"Uncle, come on, I'll draw a pattern and you can see." Yang Heng has been thinking about how to draw the water truck. Yang Heng planned to make this water truck five meters in diameter and one meter thick, but this required an accurate size and some paper. But so far, he didn't have any paper in his hand. He even asked his father to buy it, but he didn't buy it. He just bought some small paper. These papers had lengths but had no width. Yang Heng turned off his plan to use paper to make drawings.

When Yang Heng saw the snow outside, he suddenly had an idea that the drawing could be drawn on the snow. This was why he pulled his uncle out.

"Nephew, what do you want me to see?" The uncle was wondering where the nephew took him. There was nothing good about the backyard, and the bare snow was very flat.

"Uncle, pull the rope head and then stand here and circle with me." Since you want to draw a picture, you have to draw a big circle first, and Yang Heng used a one-to-one ratio to draw the picture.

In this regard, my uncle did a good job. Yang Heng pulled the rope around the periphery, while my uncle was in circle on the spot and was always facing Yang Heng. This ensured the smoothness of the circle. Moreover, Yang Heng advanced at a uniform pace, thus calculating how many steps the circle was around. After calculation, Yang Heng divided the big circle into dozens of equal parts. Between each equal parts, he would pull the rope up and down with his uncle, and such a straight line showed the way on the snow.

"Nephew, what are you drawing?" A pattern has been completely drawn. My uncle obviously felt that this was an important thing, but this was just a side view and not a full picture, so he was anxious.

"Uncle, don't worry, let me draw the side of this thing again," Yang Heng led it out with lines on a short edge of the circle. This was to draw a front view, but Yang Heng did not draw it all, but just chose a paragraph. It can be said that this waterwheel relies on these small sections to form a large waterwheel, so naturally there is no need to draw it too complete.

"You are something to get water," said uncle uncertainly. In this era, some water trucks were also seen by uncles, but they were all troublesome and manpower needed to get water. So when Yang Heng drew the bamboo tube, he could basically confirm that it was a water truck.

"Well, yes, uncle, this is a water truck, and it is a water truck that uses water flow to automatically draw water. The place I draw next is the most important place, that is, the axis." Yang Heng then drew a regular small circle in the center of the pattern, and then started the production of this pattern in another place outside.

"Uncle, you can use a whole piece of wood in the center, but you leave a round hole in the middle, and I want to inlay an iron shaft. Uncle, have you listened to me?"

Suddenly, the uncle disappeared. Yang Heng turned his head and found that the uncle was now in a deep thought, and he was thinking deeply. It seemed that he wanted to imprint this pattern deeply into his mind and make it out. The happiest thing for a craftsman was to create a weapon that benefited the country and the people. The pattern of the water wheel in front of him must be beneficial to the country and the people. If this pattern may not be an important thing in the eyes of my father, but in the eyes of my uncle, such a professional, it is a treasure. Especially, he not only participated in the manufacturing, but also the first maker. This is a good thing that can leave a name for history.

"You, what are you doing? You are committing a crime. I have not recorded such an excellent water truck pattern, you wiped it off. This." Yang Heng saw his uncle in deep thought. This is not true. It is winter and it is in the snow. What should I do if my uncle is frozen? So Yang Heng quickly wiped out the pattern in front of him.

"Uncle, this is what I painted. I don't know the pattern yet. It's my uncle. What size do you use." This is also something that Yang Heng suddenly remembered, because over the past period of time, he has used a comparison quantity for whatever he does. If it grows, it will be reduced a little. If it is shorter, there is no way, so he has to waste this piece of wood. It is because of this that the first house in Yang Heng's family has a lot of shortage of waste materials on the side.

"What size is used? Just look at it with your eyes." The uncle was very puzzled. Does this still require size? Yang Heng was also very puzzled. If there is no ruler or standard, can this water truck be made?

"Let's go, uncle, let's go into the house, I'll design a ruler for you." Yang Heng has observed his uncles recently, and even his parents, and found that only his uncle's figure is the most reasonable. So, now use his uncle's arm span and shoulder width as one meter.
Chapter completed!