The grass grows and the warbler flies in the February sky, and the willows are drunk with spring smoke.

The children returned early from school and were busy releasing paper kites in the east wind.

Inadvertently saw a kite floating at the entrance of the village, Zhang Feng woke up to the fact that it was another year of kite flying season.

At this time, several tourists are flying kites on the river beach, it seems that a family of three, feel very warm and happy, think about when you were a child, the little friends have no money to buy kites, then use bamboo strips, newspapers, paste and other tools and materials, their own kites, although the success of flying is very few, but the friends are still very happy.

Thinking of this, Zhang Feng also had the urge to make a kite with his own hands.

Hurriedly returned home, rummaging in the utility room, looking for tools and knives, bamboo and white cotton paper, these are the tools and materials for making kites when I was a child.

What if there is no paste?

Then use flour to prepare it yourself, pour the white flour into the tea jar, then flush and stir, and finally put it on the induction cooker to boil for a while, keep stirring, and feel that it is already viscous.

"What are you doing, madman?" After school, the little guy ran into the yard on his feet, saw Zhang Feng cutting bamboo strips, bent down, and asked curiously.

"Guess what I'm doing?" Zhang Feng asked with a smile.

"Hee-hee, I know you're making kites, aren't you??" replied the little guy with a smile when he saw the other tools on the ground.

"Yes, how do you know?" Zhang Feng asked curiously.

"Hee-hee, I just saw Brother Tie Dan do it yesterday!!" the little guy said triumphantly.

"Brother Madman, why did the kite fly to the sky??"

"Because the wind has the power of the wind, don't you see that when the wind blows, the leaves on the ground are blown everywhere?"

The little guy nodded silently, and seemed to understand, but he didn't seem to understand.

"Crazy brother, why did the plane fly into the sky???" asked the curious baby again.

"Haha, how is that possible? How can a plane be blown into the sky by the wind when it is so heavy??" Zhang Feng laughed.

"Why is that??" the little guy asked, breaking the casserole.

"It's complicated, when you go to middle school, you'll know when you learn physics!!"

Little guy, folded his hands and counted them, one, two, three...... , and then frowned his little eyebrows, and said with some distress: "Oh, that's going to have to wait for a long time!!"

In fact, the flight of an airplane relies on aerodynamic force, which is different from a balloon or balloon airship that lifts off by air buoyancy. Balloons and airships are lifted by the upward buoyancy of the air due to the fact that the specific gravity of the gas in them is different from that of the air, which is smaller than the specific gravity of the air.

However, the specific gravity of the aircraft is much larger than the air, and the density of the air is so small that it can only provide very little buoyancy, and the stationary aircraft cannot fly.

However, if the aircraft is propelled in the air, it can only fly off the ground if it reaches a certain speed and other conditions, even if it is a helicopter, it also relies on aerodynamic power, relying on the rotation of the rotor to a certain speed and reaching a certain lift, before it can be lifted into the air.

Therefore, the flight principle of the aircraft involves more complex aerodynamics, even in junior high school and high school, it is only a little popular science, and if you want to study professionally, you must choose a relevant major in college.

After a few hoops, Zhang Feng rested a bamboo strip.

The kite made by Zhang Feng is the simplest rectangular kite, tied into a king character with four bamboo strips, and then pasted with white cotton paper, and then put on the line after the paste is dry, and a simple kite is completed.

"Wow, madman, let's go to the entrance of the village to fly a kite, okay?" the little guy shouted excitedly when he saw the kite that had been completed in Zhang Feng's hand.

"Don't be busy, wait until I find some more white lines. ”

There are a lot of white lines needed to fly kites, but fortunately, there are a lot of white lines left in the soles of my mother's shoes.

Particular people will also make a kite string rotor, but Zhang Feng can't wait that long, and he doesn't want to be so troublesome, just use a chopstick to wrap the white thread on it.

"Let's go, fly a kite and go to ............" The little duck happily followed Zhang Feng to the river beach, excited and very cute.

"Xiao Masako, madman brother wait for us......"

Seeing Zhang Feng and the little duck holding kites, Da Mao and a few little guys threw down the broken bricks and tiles in their hands, and chased after the two of them.

"Hehe, this child is really!!" Zhang's mother Wang Guilan shook her head with a smile after seeing it, I don't know if it was the little duck or her own son, her eyes were full of smiles.

…………

"Yo! Xiaofeng is going to fly a kite? with such a large group of children. ”

Aunt Gui Lian was resting in the square, and when she saw a group of little children behind Zhang Feng's buttocks, she asked with a smile.

"Hehe, won't this be idle? Just make a kite and play with it!!"

Zhang Feng smiled embarrassedly, and hurriedly walked away after speaking.

Seeing Zhang Feng fleeing in embarrassment, the women at the entrance of the village immediately laughed and thought it was really interesting.

The little children also laughed without knowing why, Zhang Feng couldn't help wiping his sweat,

"Hehe, Xiao Feng is really, such a big person is still playing kites!" Aunt Gui Lian said with a smile.

"What is this??Look at the river beach, most of the kites flying are adults!" Aunt Dashan said with a smile.

"That's ...... too"

If you are in the city, it is normal for adults to fly kites, but in the countryside, kites are children's toys, and adults really have no one to play with this thing.

…………

"The wind is coming, get out of the way!"

Zhang Feng drove away the little children who were following him, lifted the kite, and ran towards it, the kite went up against the wind, and flew high into the sky in a blink of an eye.

Zhang Feng ran and put the line at the same time, and the kite flew higher and higher, farther and farther.

"Wow!!Fly, madman fly......"

"Ah, flying so high......"

When the little ones saw it, they shouted excitedly, jumping and jumping, as if it was not Zhang Feng who flew the kite, but themselves, and they were excited.

Feeling that the kite has been flying smoothly, Zhang Feng also stopped, slowly put the line, let the kite fly higher, because only in the higher place, the wind is bigger and longer, only in this way, the kite can be more stable, stay in the air for a long time will not fall.

"Brother Madman, your kite flies so high!!" Looking up at the kite in the sky, Xiao Shi said to Zhang Feng with a face full of adoration.

"Brother Madman, did you make this kite yourself??" Da Mao asked curiously.

"Of course, I just saw the madman do it!!" the duckling said triumphantly.

"Wow, madman, you're so amazing!!" After the little guys knew that this kite was made by Zhang Feng himself, they immediately admired it.

"Oh, if only I could make kites!!" Seeing the high kite flying in the sky, Xiao Shi said with some envy.

This sentence seemed to speak the hearts of the little guys, and everyone looked at Zhang Feng with envy and longing.