Anyway, I can't leave the house for the time being, so I have time. Although my father asked him to prepare for the provincial exam, he knew very well that no matter how hard he worked, he would never pass the exam.

Because of the provincial examination, Li Ying's affairs cannot be mentioned to his father for the time being. Yu Ren was a little depressed. He decided to send someone to Hangzhou to send a letter to Li Ying. The best candidate for this letter was naturally Cao An. But Cao An must not be sent out now. Otherwise, he would be unable to get out of the yard of Guanguan every day.

It seems that it is better to ask Hu Zi and the others for help and find someone to send a letter to him.

After thinking about Li Ying's incident, Yu Ren continued to think about the problem in front of him.

There is no problem with adding a spiral on a small boat. This kind of boat can be just added with a shaking handle. It is very simple. But when you arrive on a large boat, the spiral will be larger in size. In this way, this power will become a big problem. Yu Ren is always not confident about whether he can pull it with a mule and horse.

He is not from a science and engineering subject, and he is still not able to calculate the specific amount of power conversion. Therefore, he is not sure how big the size needs to be made. He can only roughly estimate it. Fortunately, his current customers have not made too specific requests to him.

In the end, Yu Ren decided to make the spiral of the boat first, and then determine the size of the big boat based on its size.

As for the steam engine, we still have to wait until we sell these two boats. Not only because we don’t have time, but also a more important reason is because we don’t have money.

Liu Xi looked at the darkness in the distance. He felt that in such a quiet darkness, his head became extremely clear. Some formulas in the middle school physics class a few years ago began to gradually enter his mind. This was very helpful for him to design the size of the spiral pulp in front of him. He wanted to write them down, but there was no paper or pen and light at hand.

Yu Ren found a branch and wrote down the formula he thought of on the ground first.

When Liu Xi came back, she saw that there seemed to be no one in the straw hut from afar. Liu Xi was a little worried. He thought Yu Ren had gone out. This was outside the city, and Yu Ren didn't know much about the road. It was so dark that it was easy to go to the wrong place.

More importantly, although it is very close to the city, it is also very close to the mountains, and sometimes wolves appear.

"Brother Ren?" Liu Xi called twice, but no one responded. Liu Xi put the paper and pen in his hand and a bag of food on the table, and quickly went out with a lantern to find someone.

As soon as he left the door, he saw a figure squatting on the sand outside the straw shed. When he came in, he stopped him because there was a pile of wood in front of him and did not see it.

Liu Xi quickly walked over with a lantern.

"Stop!" A voice suddenly screamed.

Liu Xi was shocked. However, he then felt relieved. Because the person who called him was indeed Yu Ren. Yu Ren did not go out.

"Just stand there and don't move!" Yu Ren said, walking out carefully, as if he wanted to avoid something on the ground.

Liu Xi thought there was something like poisonous snake on the ground, but after watching it for a long time, he saw nothing.

Yu Ren walked through the "dangerous area" like a flower jumping, then he felt relieved, threw down the branches in his hand, and said to Liu Xi, "Let's go!"

Liu Xi carried the lantern in front of him, but finally couldn't help but look back at the land, but he still didn't see anything.

Yu Ren returned to the straw shed, immediately spread out the paper and pen, and wrote down the formulas he had just thought of one by one. Then he drew his designs one by one on the paper.

That night, Yu Ren was busy until the second update and fell asleep. When he woke up, Hu Zi had already returned, and he brought breakfast to the two of them.

"How is it? Did you borrow the boat?" Yu Ren asked when he met.

"Borrowed. According to your request, it is an old ship, very small."

"Let's go, let's take a look!" Yu Ren stopped eating breakfast, so he led Hu Zi and Liu Xi to see the boat first.

This boat really meets Yu Ren's requirements, and he was very satisfied with it when he saw it.

After watching the boat, the three of them returned to the straw shed for breakfast.

After breakfast, Yu Ren and the two of them began to transform the boat according to the drawings they designed.

It was almost noon, and Tian Jia also came back. He said that the items had been customized and could be obtained before noon tomorrow.

Yu Ren was very happy, so the four of them worked together. Before dark, they finally transformed the boat. Now, everything is there, only the east wind is needed, and they are just waiting for the spiral.

Early the next morning, Yu Ren followed Tian Jia to get the spiral pulp.

When Yu Ren saw the spiral he customized, he realized that he was not clear enough about his prior explanation. The spiral he had just made was cast of copper and iron, but it was not covered. In this way, the resistance would greatly increase.

There was no choice but to ask the blacksmiths to clean up the surface again.

This time, in order to prevent another accident, Yu Ren stayed in the blacksmith shop.

After the spiral was polished, it was getting dark again. Although this copper-iron alloy thing didn't look big, it was not light at all. Yu Ren originally wanted to find a carriage to help them deliver it. However, Tian Jia was unwilling to do so. He went home to find a wheelbarrow, put the spiral onto the car, and pushed the car back by himself.

When we arrived at the place, it was dark again. But a few young people couldn't wait any longer. Everyone set up a few fires outside for lighting, so they put spirals on the boat.

After a long time, we finally installed the spiral pulp. Only then did everyone breathe a sigh of relief.

Looking at this device I had never seen before, Liu Xi asked suspiciously, "Brother Ren, is this thing really OK?" In fact, this is also the common question of Hu Zi and the others. The three of them were not very confident about whether the thing Yu Ren created was really useful. It was just because they had no better way at the moment, so they could only let Yu Ren go and do it. Just be a living horse!

"Is it OK? Let's try it in the water!"

The four of them dragged the transformed boat down the water.

When they got on the boat, Hu Zi and Tian Jia held a piece of pulp in their hands, and Liu Xi sat on the bow of the boat and carried lanterns for everyone.

"Now, let's compare. Let's see if you paddle faster with slurry, or if I use this spiral to make the boat run faster, how about it?"

"Forget it! It's so dark, so let's wait until tomorrow to compete! I'll go to the IOU boat tomorrow. Let's compete officially. If you win, I'll go to the Shi Man Wai and let him see it." Sun Menghu said.

"Okay then!" Yu Ren said as he reached out to pick up the shaking handle and shook it. To be honest, Yu Ren was also nervous. After all, this was his first time designing this thing. He was not sure whether it could succeed.

However, the facts finally proved that Yu Ren's design was very clever to copy others. The boat drove forward quickly under the push of manual spiral.

At this moment, the three of them finally completely convinced Yu Ren. The boat speed was obviously much faster than the traditional wooden pulp paddling.

"It's great. I'll go to meet Shi Yuanwai tomorrow." Hu Zi said excitedly.

"Yes, but you still have to come first with the IOU boat. Only with comparison can we show the superiority of our boat." Yu Ren said while shaking the boat.

"Brother Ren, let me try it too!" Tian Jia, who was standing beside him, felt itchy in his heart.

So, the four of them had itchy each, and then they went back to sleep with satisfaction.

The next day, several people divided the work again and took action.

In the afternoon, Shi Yuanwai came indeed. This time, he did not bring someone away. He was a shrewd and capable young man. The young man was Shi Yuanwai's nephew, named Shi Youcheng. Shi Youcheng worked in Nanjing for a long time to help Shi Yuanwai manage his business. Therefore, he was very familiar with the situation in Nanjing.

Mr. Shi took his nephew with him, and the meaning was very obvious. That is: Don’t think that we outsiders are all suckers. I know much more about Nanjing than you. In fact, after all, Mr. Shi was still skeptical about the kind of ship that Yu Ren boasted to him. And his nephew became even more disbelief after hearing his uncle’s account.

From a distance, Shi Yuanwai saw two small boats parked by the river. There was no mattress on one of them.

"Is the ship you mentioned the same one?"

"Yes." Yu Ren was with Shi Yuanwai. From Shi Yuanwai's tone, Yu Ren could clearly feel his distrust in himself.
Chapter completed!