The bamboo dragonfly flew to a height of more than 20 meters, and when it reached the highest point, it did not fall immediately, but rotated smoothly in its original position, but soon the rotation slowed down and began to land slowly.

This scene happened to be seen by Brother Wren, who didn't know where he came back, and immediately shouted: "Monster monster"

When everyone heard this, they all burst out laughing.

The flying principle of bamboo dragonflies is actually very simple, but rural people basically don't know that they can make it and how to do it, so that bamboo dragonflies can fly higher. On the other hand, city dwellers may not know how to make it at first, but they have been exposed to science since childhood, and as soon as they see this shape, they can almost guess how it works. This is the difference between urban people and rural people, and the two focus on different directions.

There is an inclination angle between the blades of the bamboo dragonfly and the horizontal rotation surface, and this inclination angle can be adjusted.

When the rotor rotates, the rotating blades push the air downwards to form a strong wind, and the air also gives the bamboo dragonfly an upward reaction lift, which changes with the inclination angle of the blades. When the lift force is greater than the weight of the bamboo dragonfly, the bamboo dragonfly can fly upward.

The blades and rotating surface of the bamboo dragonfly also maintain an inclination angle, so when we rotate the bamboo dragonfly by hand, it will get the reaction thrust of the air and fly upwards.

The greater the resistance area of the wing surface, the greater the force, and therefore the greater the reaction force, and the higher the bamboo dragonfly flies. However, we also found that the larger the resistance area, the greater the rotational force required, so it is not practical in the actual operation of the bamboo dragonfly, and it may be necessary to find a balance point in the force and angle area to make the bamboo dragonfly effortless and easy to operate and fly high.

Seeing the bamboo dragonfly landing, several children ran towards the bamboo dragonfly regardless of the image.

"You are not allowed to move, this is what my Uncle Chu made for me." Xiao Yezi is a little domineering.

The other filial sons really stopped, looking at the bamboo dragonfly, very reluctant, but there were also two girls who ignored Xiao Yezi's words. That's Xiao Yazi and Wan Jia's little Lori, the two little girls can run fast.

The two caught the bamboo dragonfly almost at the same time, and one person caught the bamboo handle. A man tugged at his wings. The two of them worked hard, and a good bamboo dragonfly was disassembled.

Wan Guoliang and Miao Huo glanced at each other, and they both smiled bitterly.

"It's all you two little girls, what are you robbing? I'm all mine, if you break it, then compensate me" Xiao Yezi accused the two little girls in an old-fashioned manner.

The three of them began to quarrel, and the parents of both sides hurriedly stepped forward and mud.

"Old village, these are also small handicrafts, let the villagers also make some, but naturally they can't be made so rough. You have to do it carefully and make it beautiful. As soon as Lai Tianxiang saw it, he knew that this was also a business opportunity. Traditional handicrafts are often very connotative. In the process of making and playing with bamboo dragonflies. You can appreciate the fun of ancient Chinese children's toys and the mystery of science and technology.

Chu Jiaqiang nodded, since they need it, of course there is no problem, it is not difficult to make this bamboo dragonfly.

"I remember that this toy seems to have been declared a cultural property by Japan a few years ago." A tour with a strange face.

A few years ago, Japan did apply for bamboo dragonflies as their domestic cultural heritage, and according to their country, bamboo dragonfly artifacts made of wood and feathers were unearthed in the 8th century A.D. at the site of Heisei Palace in Nara. And many filial sons who like to watch cartoons know that this is also a flying tool in "Doraemon".

At this time, Professor Wen, who was watching the excitement next to him, shook his head and said, "We appeared hundreds of years earlier than them in China. It was invented more than 500 years BC. Japan is just a teacher stolen from the Tang Dynasty, so I thought it was theirs, and it was really shameless.

In the end, many of our domestic cultures have not been well protected and have been turned into empty spaces by other countries. Just like our Dragon Boat Festival, it was not snatched away by South Korea. I really don't know how long the brains of those international cultural auditors are, and they can all pass. almost didn't change Qu Yuan's nationality and move to their country. ”

At this point, Professor Moon was quite indignant, shocked by the shameless behavior of Japan and South Korea, and surprised by the inaction of international cultural heritage auditors. is even more angry at his own country, and he doesn't pay attention to it at all.

The older generation likes to live in the countryside. One of the important reasons is that they can see the things in their memories and the inheritance of Chinese culture in the countryside.

The others were silent, and it was a shame to come. The awareness of the protection of cultural heritage in China or among the Chinese people really needs to be strengthened.

"Brother, I have to trouble you to do a few more, otherwise these little guys won't be able to settle down." Miao Huo had no choice but to rescue Chu Jiaqiang. This bamboo dragonfly seems to be very simple, but Miao Huo knows that he will definitely not be able to make it all at once, mainly because of the degree to which the pair of wings needs to be made, which even a layman understands to him.

Chu Jiaqiang immediately started and made several in a row, except for his own children in the countryside, every child had it. It's not that he's biased, and he doesn't think it's necessary. The children in the countryside can do it, and sometimes they do it even more exquisitely.

"It's interesting to turn to the ground and fly to the sky." A tour happily authentic. He also took matters into his own hands and made a unique little spinning top, as well as a bamboo dragonfly.

Zhou Furong took a bamboo dragonfly and rubbed his hands. Let everyone fall through the glasses, the bamboo dragonfly not only did not fly, but also accelerated its decline. Zhou Furong's face turned red, and he said embarrassedly: "Boss, you are not up to standard."

"Uncle, you're mistaken, it's not like that. Put it flat, it is not high, and you should put it obliquely. A child from Chujiazhai spoke. The boy picked it up, and then gently rubbed it himself, and the bamboo dragonfly flew up. This child is also a familiar hand, and his hand is not to make the bamboo dragonfly go straight up, but to fly away.

"Haha, the third child, you are really talented" Ye Jisheng suddenly laughed.

Subsequently, the people who put the bamboo dragonfly put the bamboo dragonfly, and the small spinning top turned the small spinning top, even some adults couldn't help but itch their hands and compete with others.

Chu Jiawan gave a small spinning top to Chu Jiaqiang: "Brother, you turn one and show them." She knows that her eldest brother is very good at spinning small spinning tops, and others are all rules and regulations when turning small spinning tops, but eldest brother can play a lot of tricks.

Others also wanted to see Chu Jiaqiang's stunts, so they all stopped at this time to watch Chu Jiaqiang's performance.

Chu Jiaqiang didn't spoil everyone's interest, picked up the small spinning top, turned it in the air, and then let go. The little spinning top fell straight down, and to everyone's surprise, the little spinning top not only did not stop rotating because of the fall, but still rotated at high speed, and jumped up and down several times before it settled down and rotated on the ground.

Subsequently, Chu Jiaqiang still picked it up, but this time it was not vertical, but slightly oblique. When the spinning top hit the ground, it didn't jump like it did just now, but drew circles on the ground as it turned.

After that, it's a lot of fun, and it's like dancing from side to side. Don't go to those games, even Professor Wen was stunned by this kind of gameplay. He was a little stunned and said: "The spinning top has been played by you to such an extent, and you can be regarded as a master."