When Lao Zhudu was offering sacrifices to heaven and earth, he told the heavens about the auspiciousness, but for some reason, no news came out at all.
When Han Du was wandering around the streets these past few days, he didn't hear a single person talking about this matter. Logically speaking, the people in the capital like to talk about all kinds of news, no matter who is promoted or demoted. Or whose family is getting up again, and whose boy is getting married again. Anyway, people are eager to talk about it in the streets and alleys.
In such an environment, as long as the slightest news comes out, food is related to the lives of the people, and it will definitely become a topic of praise among the people.
But now there are no people talking about it. Without thinking, Han Du knows that it must be Lao Zhu who has blocked the news.
As for why Lao Zhu did this, Han Du didn't know and didn't want to know.
Han Du had no time to guess Lao Zhu's thoughts now. He had more important things to do, which was to receive Xue Xiang.
Xue Xiang has a head full of gray hair, but it has turned completely gray in just two years. There were ridges and grooves on his face, as if he had aged more than ten years.
Han Du saw the worried face and said, "What's going on, sir?"
Xue Xiang glanced at Han Du with a smile, waved his hand and said, "It doesn't matter, your hair will always turn gray when you get older."
Han Du suddenly felt that he was a little inhumane to Xue Xiang. According to Xue Xiang's age, it was already time for him to have grandchildren and take care of himself. But because he stayed in the academy to work for his own personal reasons, Han Du felt a little sorry for him.
"Are you too busy with the affairs of the academy?"
Xue Xiang waved his hand and sighed: "What am I working on? It's just that I'm old and have to grow old."
Han Du smiled and nodded, accepting Xue Xiang's statement. However, I still think that Xue Xiang became like this because he was busy with the affairs of the academy. I had thrown away the academy to Xue Xiang just to escape from leisure. I didn't expect that I would be free, but Xue Xiang would become like this.
Xue Xiang really didn't care. He paused for a moment and said, "But there are people in the academy whose hair has turned gray due to hard work."
"Who is it?" Han Du asked nonchalantly, with a relaxed look on his face. Anyway, apart from Xue Xiang in the academy, he didn't owe anyone, he was debt-free, and he had nothing to worry about.
Xue Xiang glared at Han Du angrily, his hair and beard all spread out, and his fingers like dead branches were tightly gathered, wanting to beat Han Du.
"Did you forget what you did?"
what did I do? Han Du looked confused.
Xue Xiang shouted in a deep voice: "Have you forgotten about the reward of one hundred thousand guan? Or do you think that the academy can't build the machine at all, and you have never thought about offering this 100,000 guan?"
Xue Xiang had a bad look on his face. When he thought that Han Du might be deceiving those in the academy, he had a bad look on Han Du. How many people in the academy had worked so hard for one hundred thousand dollars? If Han Du dared to go back on his word, Xue Xiang would never let him go. Even if it goes to the imperial court, he will seek justice for the gentlemen of the academy.
"I'm telling you, don't even think about going back on this one hundred thousand yuan! Otherwise..."
"Who wants to go back on his word?" Han Du said without hesitation, "If they can really build the machine, I will give them every cent of it."
"Did they really create it?" Han Du was immediately overjoyed.
Seeing what Han Du said so categorically, Xue Xiang's heart slowly relaxed. Suddenly hearing Han Du's question, he smiled awkwardly and said, "That's not true. I heard from Sun Xian that he hasn't met your requirements yet. Now he is thinking hard about how to improve."
Han Du felt slightly disappointed when he heard that it had not been built yet. But then I thought about it and felt that it was natural. Although the academy was guided by the mechanical knowledge taught by its own professors, it wanted to let a group of scholars who had only read books from saints and sages in just over two years rely on their hands to learn knowledge bit by bit. Building a steam engine would be too difficult.
Seeing the disappointment in Han Du's expression, Xue Xiang said without hesitation: "Although Sun Xian said it was not enough, I think it is enough. After all, that thing can move on its own now, and it meets your requirements. Anyway, don’t even think about giving me 100,000 guan. I think that even now, you should at least give me 50,000 guan.”
"Oh?" Han Du's eyes suddenly lit up. He didn't take Xue Xiang's request for money to heart at all, but was extremely interested in the progress he said.
He blurted out and asked: "Have they really built the machine to this point?"
Xue Xiang was a little unsure of Han Du's attitude, and said hesitantly: "Anyway, if you keep boiling water, the thing will keep moving. But Sun Xian said that the strength of the thing is too weak, and it can't be said to be of any use. Now I’m thinking of building a bigger one.”
Han Du suddenly couldn't sit still and stood up quickly to go out. After taking a step, I was suddenly shocked to realize that Xue Xiang was still sitting here. He quickly turned around to support him and said eagerly: "Sir, let's go to the academy now."
Xue Xiang is such an old fox. Seeing Han Du being so anxious, he became less anxious. He picked up the teacup, blew it slowly, and said, "Why are you panicking? This is tribute tea. I haven't even had two sips of it yet. Wait until I finish drinking this cup of tea before you go."
Han Du is now eager to see how far Sun Xian and others have built the steam engine. Where is the time to waste here with Xue Xiang? But Xue Xiang is of high moral character and high prestige after all.
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What would it be like to leave him here alone and run away?
"It's just some tea leaves. Since Mr. Lao likes it, why not give it to Mr. Lao?" Han Du waved his hand grandly and immediately shouted towards the door: "Come here, pack two kilograms of tea leaves for Mr. Lao and deliver it to you." Go up to the house."
"Yes, Lord Marquis." The servant waiting outside the door immediately went to do it.
Han Du then turned around and asked Xue Xiang, "Sir, can we go to the academy now?"
"Looking at what you said, I don't want your tea." Xue Xiang put the tea cup to his lips and put it down before drinking. He immediately stood up and said, "Without further delay, let's go to the academy right now. "
...
Xue Xiang led Han Du to where Sun Xian and other man-made machines were, pointing to a huge iron bucket with a radius of five feet and a height of one foot, and said to Han Du: "No, this is that machine."
Han Du pointed at the huge thing in front of him in surprise, looked back at Xue Xiang and asked, "Is this thing still small?"
Xue Xiang shrugged, spread his hands and said: "I also think this thing is big, but Sun Xian said that its strength is too small. If you want to have more strength, you need to make it bigger."
Han Du suddenly felt a pain in his forehead and rubbed his face vigorously with both hands. Then he let out a long sigh and shouted loudly: "Where is Sun Xian? Let him come to see me."
Sun Xian was still in class. When he got the news that Han Du was looking for him, he insisted on finishing the class, and then hurried towards Han Du.
As soon as he entered the door, he quickly bowed to Han Du and apologized, "Sir, the students were in class just now. I am late, please forgive me, sir."
"It doesn't matter, schoolwork is important." Han Du waved his hand, not wanting to argue with Sun Xian.
Do not interrupt the lectures. This is Han Du's own rule in the academy.
Han Du pointed at the huge thing in front of him and asked, "Is this the steam engine you built?"
Sun Xian nodded, looked at the behemoth in front of him with the doting eyes of a child, and replied to Han Du: "Yes, but this thing has not yet met the requirements of sir, and it is not fully built yet."
Sun Xian thought that Han Du was going to cash out the reward for him. Although he was also very keen on the 100,000 Guan, one is one and two is two. If he builds a steam engine that meets Han Du's request, he will certainly not refuse Han Du's reward. But if Han Du's requirements have not been met, he will not ask for a reward.
After hearing this, Han Du nodded subconsciously and said, "I heard from the boss that your thing can move all the time now. Can you burn it for me to see?"
"Of course, sir, wait a moment, it takes a little long to boil the water." Sun Xian said quickly.
Han Du stretched out his hand to signal him to do whatever he wanted, "Go and do your work, I'll just watch from the side."
"Okay." Sun Xian bowed slightly. After that, he took some of his students to help him and went to work on the huge steam engine.
There is enough water in the steam engine, so you need to add some more water, and then replace some needed things.
After everything is ready, start lighting the charcoal under the machine. As the charcoal burns, add pieces of pebbles. After a long meal, the charcoal was filled and burning brightly.
A sizzling sound began to come from the huge iron tunnel. The temperature of the water was slowly rising, tiny bubbles emerged, and the bubbles burst one by one to make a sound.
The huge iron crossbar on the iron barrel started to move, and then moved up and down faster and faster. The horizontal bar drives another vertical bar to move. The vertical bar is linked to an eccentric wheel, converting the force of up and down movement into the force of rotation.
Seeing that the steam engine was moving, Sun Xian walked to Han Du with an embarrassed look on his face and said, "Sir, that's it."
Han Du took a look and thought there was no problem. Isn't that what steam engines are like?
"That's good. What's the problem?"
The embarrassment on Sun Xian's face became even more intense. Without explaining to Han Du, he walked directly to the eccentric wheel and reached out to grab the wheel. The moment Sun Xian caught it, the wheel stopped just like that. After waiting for two breaths, Sun Xian let go of the wheel, and it began to spin rapidly again.
"The strength is too small, not much greater than the strength of one student's hand, and still far from meeting the teacher's requirements. The student is preparing to build a bigger one to see if he can increase the strength."
Han Du became angry and stepped forward and kicked Sun Xian. He said with some hatred: "Why do I have a student as stupid as you? Do you have to build a bigger one if you are weak? What is the mechanics I teach you? Food? Since you all know that you can use a pulley to lift a heavy object with less force, then why can't you do the opposite and make the force stronger?"
It was like a bolt from the blue flashed through Sun Xian's mind, making him numb all over, his eyes dull, and he lost the ability to speak.
"First, what do you mean, sir?"
Han Du said angrily: "I told you during the lecture that the size of the force is related to the distance it acts. You all know that you can use pulleys to make the force of a heavy object smaller. Why can't you do the opposite and reduce the force of a small object? The strength becomes stronger?"
"Hahaha, I know you have a lot of clever ideas, so I'm right to come to you." Xue Xiang reacted before Sun Xian. Although he didn't understand what this machine was about, nor the principles of force, but when he saw Han Du's expression, he knew there was something interesting about it.
Sun Xian turned around, danced with his hands and feet excitedly, and blurted out: "First
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Student, can the student install an opposite pulley here to increase the force? "
"Come, come here!" Han Du said with a sullen face, waving to Sun Xian.
Sun Xian ran over in two staggering steps, bent down, and turned his face sideways with a smile on his face, wanting to listen to Han Du's lesson.
Han Du raised his right hand high and slapped Sun Xian hard. "Pulley, I'll make you a pulley. Your whole family is a pulley. Let's see if I don't make you a pulley..."
The honest Sun Xian didn't dare to hide when faced with Han Du's continuous slaps. He just endured it like this, his face full of bitterness.
Xue Xiang was still quick-sighted and quickly stepped forward to pull Han Du away. "What are you doing? You don't feel bad if I break it, I do."
Han Du panted for two breaths, looking like he was still unfinished.
Sun Xian hurriedly bowed down and said, "The student is so stupid that I made you angry. If you haven't vented your anger yet, please teach the student a lesson. I just ask you not to give up and help the student clear up his doubts."
Han Du snorted angrily, stepped forward and looked at Sun Xian who lowered his head, and shouted: "Get up."
"Thank you sir."
Han Du took two steps forward, looked at the continuously rotating eccentric wheel, and said without looking back: "If there is Tao but no technique, the technique can still be sought; if there is technique but no Dao, it is just the technique. What I teach you is the Tao. It is the fundamental principle of mechanics. And the pulley is just an application under this principle, it is a technique. When you encounter a problem, you don’t want to rely on Tao to solve it, but you want to install it here with a pulley. Do you think I should be angry? ?”
"The student has been taught, please give me some advice." Sun Xian finally understood where he had gone wrong, his face turned red, and he quickly lowered his head and begged humbly.
There is no need for a heavy hammer to play the drum. Sun Xian is indeed very talented in the field of machinery.
He waved his hand and said, "Turn off the fire."
Several academy students skillfully pushed out the burning coal. It was obvious that this was not the first time they had done such a thing.
The scene where Han Du beat their husband just now scared them. But soon everyone became excited again. After all, the opportunity to see Mr. being beaten by the master was rare.
However, no matter how excited they were, few of them were stupid enough to show it on their faces. The master is always so rude with his hands, and they are not sure whether the usually gentle and gentle gentleman will be the same with his hands. If the husband sees the clues and finds an opportunity to beat them up in the future, wouldn't that be asking for trouble?
It just so happened that the master ordered to retreat, and they could take this opportunity to hide the expressions on their faces.
As the coal was removed, the temperature of the water in the iron barrel quickly dropped, and the vertical rod that had been moving up and down returned to its static state.
Han Du stepped forward and took a look at the eccentric wheel and said, "This thing is not good. It cannot be made of wood."
Sun Xianxiao laughed twice and explained: "At first, the students thought that the power was too small, so in order to save energy, they made this thing out of wood."
This time, Han Du did not get angry, but patiently explained to Sun Xian: "I discovered it when the eccentric wheel was rotating just now. Every time it pauses at the farthest and nearest places."
Sun Xian nodded. He naturally knew about this phenomenon. After all, they had seen it countless times. Sun Xian was extremely impressed by Han Du's ability to discover this problem after just one look.
"The student knew it, but the student saw that it had little impact, so he didn't take care of it."
Han Du smiled and said meaningfully: "Not much impact? That's because your current steam engine is still very crude and cannot be used in practice. If this problem is not solved, when you actually use it, you will I found that this thing often gets stuck here and even rotates in the opposite direction."
Sun Xian also knows the seriousness of reverse rotation. If it becomes like this, it will be completely useless. He quickly asked: "What should we do?"
Han Du touched the eccentric wheel with his hand, broke it hard, and said: "It's very simple, replace this thing with iron."
"Sir, if it were made of iron, it would probably weigh a hundred pounds. Isn't that too heavy?" Sun Xian asked worriedly.
Han Du sneered and said: "Too heavy? I think it's a bit light. I'm afraid a hundred pounds is not enough, but a hundred and fifty pounds is almost enough."
Sun Xian was stunned and asked without thinking: "If it is so heavy, can the machine carry it?"
Han Du raised his eyes to look at Sun Xian and said with a smile: "You will know if you can move it with me if you try it?"
Sun Xian was immediately speechless by Han Du's words. Yes, you will know after trying it.
In this case, Sun Xian turned around and found someone to build a larger cast iron eccentric wheel.
Han Du raised his hand to stop him and continued: "It's not over yet. Why are you so anxious?"
"Sir, do you have any other instructions?" Sun Xian bowed his hands and said.
Han Du continued: "The eccentric wheel needs to be modified, and you also need to make a few other wheels. In this way, I will draw some pictures for you, and you can find someone to build them according to the drawings."
"Okay, sir." Sun Xian nodded and agreed with a smile.
It’s not often that I can see my husband drawing pictures in person. Now that I have the opportunity to see it, why not take a closer look?
Sun Xian quickly asked a student to go back and get a ruler, compass and charcoal pencil, ready to see what kind of picture the teacher wanted to draw.
(End of chapter)
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