Zhang Rou followed He Wuji to the experimental area of the research institute, and the rest of the people were still nervously carrying out various debugging work in order to meet the acceptance of Boss Zhang.

A strange thing at the edge of the pond, 10 feet long and 5 feet wide, first caught Zhang Rou's eye, she leaned up to take a look, and found that this strange boat model was two wheel-like things on both sides of an ordinary boat, and then there was a windmill made of canvas standing on the top of it, and she didn't understand how to play this thing for a while.

Looking at Zhang Rou's puzzled expression, Jia Xian felt quite good about himself, he was always pressed by a girl who was younger than the direct one, and the depression in his heart was needless to say, seeing that it was not easy to show his face once, he volunteered to stand up and show his proud work, and there were several other people who helped him make artificial wind, that is, a large hand-cranked blower.

I saw Jia Xian holding a few ropes in his hands, and as he continued to pull, the windmill on the top of the boat was always facing the direction of the wind, the wind blew the windmill, and the rotating windmill drove the wheels on both sides of the boat, and the paddles on the wheels slapped the water surface with its rotation. In addition, the rope is connected to the rudder, and under Jia Xian's control, the bow monster boat is like learning breaststroke, and it slowly moves forward one by one.

Although the appearance of the boat walking is ugly, after all, this new concept of the bow "boat" can still take advantage of the wind to travel, in general it is still good, everyone is cheering for it, of course, also cheering for themselves in the bottom of their hearts, after eating white rice for so long, now there is finally a thing that can be handled, I think it is worthy of the big fish and meat every day!

Girls generally don't like mechanical things, and Zhang Rou is no exception, but this difficulty is still difficult for her, how to say that it has been mixed for decades in the 21st century, and this insight is still there. However, thinking that people at this time can think of this method to use wind energy, it can be regarded as ingenious, she couldn't help but nod slightly, which made Jia Xian even more excited, and kept tossing her proud work back and forth in the pool.

Ordinary sailing ships were not uncommon in the Song Dynasty, and they also had a long history, so much so that they were used for hundreds of years, but with different sizes and masts. However, ordinary sailing ships have an unavoidable drawback, that is, the requirements for wind direction are relatively high. Maritime navigation is basically carried out with the help of monsoons, but of course it is possible to take advantage of the vast sea surface to zigzag, and in this way it is possible to borrow a certain angle of wind to move forward.

However, the wind direction on the river is basically in the direction of the current, and the possibility of catching the wind when going against the trend is basically zero. Therefore, I have to say that Jia Xian's idea is still quite naïve.

Of course, Jia Xian is an authentic ancient, he doesn't know what the law of conservation of energy is, he just changed the wind direction acceptance device for granted, and thought that he could challenge any wind direction. Even in the most ideal state, the angle at which this structure can use the wind direction is limited, and the angle between the vector of the wind direction and the vector of the direction of the ship cannot exceed 135 degrees, not to mention the existence of factors such as energy transmission loss and friction resistance.

Zhang Rou did not directly point out their problems, but asked them to build a finished product according to this model, and then everyone went to the Yangtze River to have a good time. After all, with their knowledge system, it is impossible to understand these mechanical problems with them, so Zhang Rou decided to let them experience it from practice, and then they will dial it themselves, so that the effect may be better, and it is also conducive to cultivating their innovative quality.

After some time, the inkmen worked overtime in the shipyard and soon built the first wind turbine, about ten meters long and five meters wide. In a hurry, the ship was not fitted with anything else, just a lone pestle on a shelf for mounting the wind wheel. The wind wheel with a radius of about five meters almost covers the hull of the ship, but fortunately, except for the skeleton of the wind wheel, which is wood, the rest of the body is canvas, which does not affect the center of gravity.

On this day, the wind and the sun were beautiful, and the sky was clear, which was a good time for sea trials.

Zhang Rou and the shipyard group drove the ship around the strange ship, and slowly sailed out of the shipyard gate, for the sake of insurance, the operators of the strange ship are some sailors who are proficient in water, and the others follow in ordinary boats, just in case.

Their fanfare action must not be hidden from the people in the city, and many people who have already gathered on the riverside to see the excitement have pointed to this strange ship and commented on it, and they are not able to understand it for a while.

Tiangong is also beautiful, and Jinling is still relatively open, at this time the river wind is not blowing in the direction of the river, but horizontally. Under these conditions, ordinary boats cannot rely on the power of the wind and rely on manpower to row, but this wind steamer can move slowly under the control of one person, although the speed is not fast, but it is also very gratifying to everyone.

The people by the river, I don't know why, saw that one person could drive such a big boat, and actually could go upstream, they were all amazed, and they only said: "The strange girl must be extraordinary!" ”。 Although it's not the strange girl playing this time, it's her industry after all, and everyone naturally attributes the credit to her.

It is unknown whether people have good fortune and misfortune, but there are unforeseen circumstances on this day!

The sailors who operated the ship still followed Jia Xian's instructions and turned the windmill in the direction of the wind, while looking forward to the appearance of the miracle......

"Yay? Look! That thing didn't move! A sharp-eyed guy on the shore suddenly shouted loudly.

"Really! It was in that place just now, and I paid attention to it......" The people next to him also echoed after he reminded him.

At this time, Jia Xian and the others, who were sitting on the boat next to them, also found that the wind steamer they had built actually began to fall behind them, so they hurriedly lowered their speed and leaned over to prepare to find out.

"Ma San, what's going on? How did the ship stop? Jia Xian and the others came to the stopped wind steamer and couldn't wait to ask the sailors who were operating the ship.

"I don't know! I just did what you said, it was fine at the beginning, but just now the wind direction changed, I followed the change, but I didn't expect the ship to not go, and it is still slowly going backwards, you see! Ma San looked panicked, thinking that he had broken something.

"Don't panic! It's not your problem, go down! Zhang Rou also followed to the boat and comforted the worried Ma San softly.

Jia Xian and the others were not willing to fail like this, and checked the devices they designed one after another, but they were doomed to be in vain.

In this way, the first trial ended hastily.

In response to this failure, Zhang Rou specially convened everyone to hold a summary meeting, and also helped them point out by the way.

"You must still be struggling with why the ship you built is not as perfect as you imagined, right? Maybe you haven't figured out what the problem is for a while? But I can tell you very clearly, I knew you weren't going to succeed in this, but I didn't stop you. I want to tell you through this incident that any invention is not as easy as imagined, and there may be many setbacks during this period, and we may not succeed in the end, but we can't stop us from moving forward because of these ups and downs. This failure is both an experience and a lesson, and when you have to find your own problems, build up ways of thinking for the future invention of other things, and then use the abilities that nature has given us, you must know to go back to the source, find the source of strength, so that you can really use them. ”

"Thank you, Master! The apprentice was taught! For the first time, Jia Xian found that he had looked away from this cheap master, and bowed to Zhang Rou sincerely.

"Next, I'm going to give you an analysis of what your problem is. As you can see, the wind turbine you designed can indeed be used under certain conditions, and your mechanism is also well represented on this ship, and you are the only one who has managed such a large ship since ancient times, and you are still remarkable in this respect, and your hard work is worth it. But why can't the boat move when the wind blows backwards? And you see that when the wind blows in your face, your wheels are turning, and the oars are turning, but the boat is not moving. ”

Everyone also stared at her with frowns, puzzled.

After satisfying everyone's appetite, Zhang Rou slowly came in their enthusiastic and expectant eyes: "That's because you have ignored a problem, as we all know, sailboats walk with the help of the wind, and you can indeed accept more angles of wind by changing the sail to a wind wheel." But no matter what, we are using the energy of the wind, this energy is certain, even if you change the boat well, it is impossible to use the wind to fight against the oncoming wind, not to mention that you are using your mechanism to transfer the wind energy to the oars, so that the oars move this process, the energy is lost, coupled with the resistance given by the current, it is reasonable for the boat to go backwards. You must know that the energy in this world is also conserved, and you should not think that you can do whatever you want with the wind alone! ”

"Master, is it impossible for this windmill to succeed in your words?" Jia Xian listened to Zhang Rou's words and asked a little discouraged.

"That's not a bad thing, it's impossible to rely on the wind alone, but there is still much to be gained in your boat. You can think of a windmill as a wind receiver, which greatly increases the angle of the wind direction that can be used, and replacing the oars with round blades also increases the speed of the paddle. But have you ever thought that if you make such a big two wheels, not only does it increase the weight of the boat, but you still have half of the paddles outside all the time, and you don't paddle to the water? ”

"Master, you said that we tried this oar problem at the time, and at first we submerged the entire oar in the water, but in this way the boat did not move, and finally we made it like this."

"Of course not, your wheel is hitting water up and down at the same time, and the force is canceled out, so it's strange if you can move! It's terrible to be uneducated! It seems that this girl has to come out. Zhang Rou sighed silently in her heart.

"At this time, I have made some improvement plans based on your ship, you can all take them and take a look! If you don't understand something, just ask it. "The thousand-year gap is indeed too big, Zhang Rou has no way to figure it out with them, so she has to resort to a killer trick and throw them a sketch she drew and let them figure it out for themselves.

Jia Xian and the others muttered about the drawings for a long time, and they had to study Zhang Rou for every change in them, although they didn't know what some of the principles were, but they still roughly understood the operation of the entire structure.

"Master, according to your drawing, can you replace this oar with such a big one, and it only has three leaves?" Jia Xian was still skeptical that Zhang Rou had changed their oars to the appearance of later generations.

"You'll know when you make it!" Zhang Rou decided to sell them first.

In fact, Zhang Rou did not improve much, that is, the paddle was replaced with the appearance of the later generations and placed on the tail, and at the same time, all the rotating bearings were replaced with rolling bearings of later generations in order to reduce friction. She still kept their wind wheels, but added a turntable in the cabin that could be rotated by hand or charged to use when the wind was not in the right direction. Of course, gear combinations have been added to these areas to reduce the drag of pushing. Finally, a shift box was added to the console, which changed the speed by adjusting the gear engagement, just like the uphill shift of later cars.

Let's say, Jia Xian and others took Zhang Rou's drawings and started a new round of rectification. A month later, the improved windmill reappeared on the Yangtze River, only this time it was more like a boat, and there were no more of the two big wheels on either side.

Due to the failure last time, there were a lot fewer people watching the excitement this time, but the enthusiasm of Jia Xian and others did not decrease. This time, Jia Xian planned to go up to operate it in person, and at the same time took a few people and a few donkeys to get on the boat together.

This time, Jia Xian made full preparations, first played a few back and forth in the Yangtze River, and felt that the boat was walking more smoothly, not like the last time. At first, he did not activate the wheel in the cabin, intending to test what his master had said, and to see if he could move forward with the wind alone.

Needless to say, the ship, as last time, not only stopped, but also regressed. The people on the shore thought that they were going to return in vain like last time, and they were ready to disperse, but they never thought that at this time, the strange ship in the river actually took back the canvas of its wind wheel to the wooden stick skeleton, and the whole wind wheel became like an umbrella frame that had lost its umbrella cloth. Losing the canvas that borrowed from the wind, the wind wheel stopped, but the boat began to move slowly, which made the people on the shore lose their eyes.

There was no oars to be seen in this boat, and there were no sails, so why did it run away on its own? Could it be that the gods have appeared!

The ignorant people gave all these credits to Heaven without reservation, and one by one they kowtowed faster and louder on the ground than anyone else.

After the success of this sea trial, Jinling Shipyard began to vigorously produce. Zhang Rou plans to build an exclusive inland river fleet for her caravan first, so that her business can enter a stage of rapid expansion.

At the same time, Zhang Rou also packed a copy of the model and drawings of the ship and gave it to Wang Xianyou, hoping to surprise him from afar.