Datang all-rounder

Chapter 239

Watching the farmers untie the airbags in a hurry, Wang Ke stepped forward and opened the airbags by himself. Wang Ke didn't dare to do this to others. It's not a problem for these people to do things according to their own orders. , but if they want to observe any changes, it will be a bit embarrassing for them, and they have to do it themselves.Wang Ke is quite clear about what he does. When it is time to do it by himself, he will never let others intervene. Now is the time like this. Wang Ke walked up without thinking.

After Wang Ke's careful inspection, Wang Ke understood that the drop of wax oil dripping on his hand was just dripping from the fabric near the chimney after it melted, which showed that the wax liquid could not bear the high temperature. However, the place far away from the chimney does not seem to have changed much, which means that as long as it is far away from the chimney, the hot air will gradually decrease, and the threat to the wax oil will also be reduced a lot.

However, Wang Ke also understands that today's test flight is only a short time, and the time is short, and the problem cannot be fully explained. For the sake of safety, I have to do experiments carefully to ensure that nothing goes wrong. I don't have much confidence, and it's in the sky, which is nothing compared to the ground. If there is any problem on the ground, at least I can stand aside immediately. If something happens in the sky, there is no place to hide!

Wang Ke didn't know what he should do to be the best for a while. If every possible possibility was to make such a large object, the cost would be high, but let's shrink it. I don't know if this stove can be reduced. You have to ask Li Ke. Wang Ke has no other choice but to ask the housekeeper to put away the things, turn around and go home. He has to ask someone to tell Li Ke to come to him at night so that he can discuss it with him. specific matters.

Back home, Wang Ke saw Nanping walking towards him with Lanling and Dongyue before Wang Ke had time to call the servants. Wang Ke hurried over, picked up Xiao Wang, and gently tapped Xiao Wang with his fingers. The small nose made Xiao Wang giggle.

Looking at the two father and son, Nan Ping asked Wang Ke softly, "General, how are your results today?"

As soon as Wang Ke heard Nanping asked about this matter, she immediately lost the mood to continue teasing Xiao Wang, and her face darkened.Dongyue knew that Wang Ke was in a bad mood now, so she hugged Xiao Wang from Wang Ke's arms in a sensible way, and walked to the side with Lan Ling, leaving only Wang Ke and Nanping talking.

Wang Ke simply told me about today's test flight, and also said his plan. When Nanping heard that Wang Ke wanted to call Li Ke, he smiled softly and said, "The general is really impatient and worships Buddha indiscriminately. There is no need to ask the third brother for this matter, isn’t the general thinking of reducing the size to do experiments? This stove can be replaced by candles, don’t they all need fire? Can’t the candle be lit as well.”

Although Nanping’s words were not correct, the fire was just to heat the air, but it still woke Wang Ke up like a dream, that’s right, it can be seen as a Kongming lantern. When I was in later generations, I also made Kongming lanterns for fun Come on, isn't it just a candle?When I was in a hurry just now, I really forgot about this matter. If Nanping hadn't said it, I would really have to discuss with Li Ke stupidly how to shrink the stove.

Seeing the happy expression on Wang Ke's face, Nan Ping knew that his words had worked. Taking advantage of Wang Ke's joy, Nan Ping quickly asked, "General, can you tell me why you can light a fire so that you can get rid of it?" Let this thing rise?"

Wang Ke was very happy, so he didn't think too much, so he explained the principle that the hot air is light and goes up, and the cold air is heavy, and goes down. Nanping was confused and didn't understand what was going on.Wang Ke talked eloquently for a long time, and just stopped when he saw Nanping staring at him with two eyes, as if he didn't understand, and then he remembered that there was no natural science at this time.

Wang Ke couldn't help but patted his forehead, and said to himself: "God, there's no way to communicate with them at all, how can I talk to them like this!"

But all this has been said, and the beginning has to be continued, but these people don't understand at all, so where do they start?Wang Ke was a little speechless for a while, and didn't know what to say for a long time, but seeing Nanping's eyes looking at him, he really couldn't bear to just prevaricate a few words like this, so he sent Nanping over.

Just when Wang Ke was in a dilemma, Wang Ke's eyes suddenly stopped on the candlestick in the corner. Wang Ke was overjoyed. He remembered an experiment he had done in junior high school, and hurriedly pulled Nanping to the candlestick, and found Take a piece of tissue paper and light a candle in a candlestick.

Wang Ke held the piece of paper upside down with two fingers, let the piece of paper hang upside down in the air, and said to Nanping: "Look, there is no wind here, and the piece of paper hasn't moved. Right?"

Nan Ping didn't know what Wang Ke meant, but he also saw that the note was indeed motionless, so he nodded and waited for Wang Ke to continue.

Wang Ke moved the small note towards the candlelight and said, "Now let's put the note above the fire and see what happens."

As soon as Wang Ke finished speaking, Nan Ping cried out in surprise: "It's moving, it's moving, how is it possible, this note can move without wind, it's amazing!"

Seeing that his goal had been achieved, Wang Ke blew out the candle and said, "Yes, why does the note move when there is no wind? In fact, this is the air at work! We lit the candle just now, and the air around the candle was heated. , but because we didn't collect it, so compared to the more unheated air around, this heat is very little, so it can only make the paper move slightly. And now we want to The hot air balloon is made by gathering this kind of hot air together. Because the air is heated and expands, it becomes lighter than the cold air without heating. We all know that very light things will rise upwards. We use this to let We made hot air balloons that went up into the sky."

As soon as Wang Ke finished speaking, Nan Ping asked again: "Then what is this air? How come I haven't seen it before?"

Wang Ke is really exhausted now, who has seen this air before, but I have to explain it, but how can I say this, I can't see it, I can't touch it, I really have something to say about it Not sure.Wang Ke decided to use something as a metaphor, lest after talking for a long time, he would talk more and more, but Nanping would become more and more confused the more he listened.

Wang Ke is really not sure about explaining this problem clearly. After all, this problem is really a bit big for people of this era. After thinking for a long time, Wang Ke finally came up with a solution.

Wang Ke led Nan Ping to the door, and stood quietly under the eaves. Nan Ping didn't know what happened to Wang Ke, but he also understood that Wang Ke's move must have deep meaning, so he didn't ask much, just stood with Wang Ke. There.

A gust of wind blew by, and Wang Ke hurriedly said, "What was it just now?"

Nanping replied incomprehensibly, "Wind, it's just a gust of wind!"

Wang Ke nodded: "Yes, it is the wind, but how does the wind come from? It is formed by the flow of air. We can't see or touch the wind, but we can feel its existence because it is transparent. Yes, air is like that, and we only feel it when it rushes and makes wind."

Nanping heard that it was right and wrong, but Wang Ke had no other choice, he had already said almost what he knew, and if he was asked to continue talking, he had no choice but to explain it clearly.Just when Nanping was still thinking with his head tilted, Dongyue ran out and beckoned the two of them to come in for dinner, and Wang Ke felt relieved.

He was really afraid that if Nanping would ask him endlessly, then he would really want to cry without tears, and there was no way to explain it!The best way for Wang Ke now is to make a few Kongming lanterns after dinner, so that the family can see that these things can go up to the sky, which is much more effective than saying it for a long time.

After dinner, Wang Ke took out some prepared fabrics and made some Kongming lanterns.Watching Wang Ke go out, the whole family followed. Even Wang Si, who always went straight back to his study after dinner, made an exception to stay today, wanting to see how the thing Wang Ke made improved. God's.

When he came to the yard, Wang Ke tied a thin string to each Kongming lantern. Now is not the time for playing by himself. Now he is doing experiments, and he will have to take it back later to see the wax-soaked cotton cloth and Can the linen be used? If you let it fly casually, how can you see the results of this experiment?

Seeing the two kongming lanterns staggering up into the sky, the whole family unconsciously exclaimed. Only Wang Si pondered for a while before sighing: "I saw this kongming lantern in a book before and said, I really haven’t seen what it looks like, I didn’t expect to see it today, it’s so magical!”

Wang Ke heard Wang Si's sigh, but didn't have time to talk to Wang Si. She just kept counting the time in her heart. Putting back the two Kongming lanterns, Wang Ke was really nervous at this moment. He was really afraid of the worst outcome he had in mind. If that was the case, he would have to spend more energy to come up with a solution This is a substitute for liquid wax.

If that's the case, I still don't know whether this substitute is feasible, and if it is feasible, will the cost increase? These are all factors that cannot be ignored that affect whether the hot air balloon can be put into use smoothly!

Turning around and returning to the house, Wang Ke didn't care about saying hello to anyone, and sat down on the sofa, looking at the two Kongming lanterns in his hand over and over again.

After Wang Ke's careful inspection, Wang Ke's heart was relieved at once.He has seen that there is no problem with using wax dipping. Now the only thing to consider is how to protect the entire lower edge circle. Since this circle is closest to the heat source, the wax here is also subjected to the greatest heat. Yes, because other places are only in contact with hot air, and the temperature of the hot air is not too high, it has no effect, and the closer to the heat source, the greater the heat it receives, and the melting point of the wax is already low, so It was melted by the high temperature, and the wax oil dripping down during the day should be the same reason.

Seeing Wang Ke staring at the Kongming lantern without saying a word, Wang Si knew that Wang Ke had encountered a problem, so he couldn't help but feel a little anxious, and said in a hurry: "Ke'er, what's the problem? Can you tell my father about it? It’s ten short and long, so tell me, and we will help you think about it!”

Wang Ke explained what the structure of the hot air balloon is now, focusing on the problems encountered now, and explained it again with the Kongming lantern in his hand, and everyone immediately knew what was going on.After Wang Ke finished speaking, he looked at Wang Si eagerly, to see what kind of advice Wang Si could give him, but Wang Si frowned tightly, and he didn't say a word for a long time. Wang Si also couldn't think of a way.

When she was disappointed, she heard Mrs. Wang say from the side: "Why do you think it's so difficult? Isn't your chimney too hot and melted the wax oil? How can you think about such a simple thing!"

Mrs. Wang's words seemed to give Wang Ke a shot in the arm. Wang Ke jumped in front of Mrs. Wang and urged her repeatedly: "Mother, tell me how to solve it!"

Mrs. Wang patted her chest and said: "Ke'er, you are scared to death, my mother, why are you in a hurry, let my mother tell you slowly."

When Wang Ke saw Mrs. Wang like that, she was really frightened by herself, so she quickly laughed and said: "Mother, take it easy, the child is not in a hurry."

Mrs. Wang gave Wang Ke a doting look before slowly saying: "I don't know what kind of chimney you have, but my mother knows that if this bowl of soup is so hot that you can't hold it in your hands, you will use a piece of cloth or something to cover it. Your hands won't feel hot, and you should be able to do the same when you think about it!"

After Mrs. Wang finished speaking, Wang Ke jumped up. Why didn't I think of such a simple truth, as long as the part of the chimney that touches the airbag is wrapped up, wouldn't this problem be solved?I didn't know what I was doing all day, so I never thought of such a method!

Seeing Wang Ke jumping up and down with a smile on his face, everyone knew that this problem had been solved, and everyone's hearts that were still hanging just now suddenly fell down.

Wang Si tentatively asked: "Ke'er, the problem is solved now, can this hot air balloon be made?"

Wang Ke desperately nodded to show that there is no problem, and Wang Si smiled relievedly: "Then hurry up and make it, and then I will try it for my father!"

(End of this chapter)