What does kite mean?

Kites were invented by working people in ancient China during the Spring and Autumn Period of the Eastern Zhou Dynasty, which has been more than 2,000 years since. According to legend, Mo Zhai made wooden birds out of wood, which took three years to develop, and was the earliest origin of human kites. Later, Lu Ban used bamboo to improve kite materials in Mo Zhai. It was not until Cai Lun improved papermaking in the Eastern Han Dynasty that people began to make kites out of paper, which was called "paper kites".

In the Northern and Southern Dynasties, kites began to be a tool for transmitting information. Since Sui and Tang Dynasties, due to the development of paper industry, people began to use paper to paste kites. Flying kites became a popular outdoor activity in the Song Dynasty.

Nowadays, flying kites is playing an important role in China, communicating with foreign cultures, strengthening friendship with people all over the world, and developing economy and tourism. Kites are the earliest aircraft heavier than air in the world.

Uplift

When a kite is exposed to the wind in the air, the air will be divided into two layers. The air passing through the lower layer of the kite is blocked by the kite surface, which reduces the air speed and increases the air pressure; The upper air circulation is comfortable, the flow velocity is enhanced and the air pressure is reduced; Yang Li is caused by this air pressure difference, which is why kites can rise.

As can be seen from the above, there are two elements in the uplift force: wind and traction, which explains the problem raised at the beginning. Under the action of wind, traction and rising force, the kite basically keeps balance in the air.

The direction of the wind is basically horizontal, and the angle of the kite and the lift can be easily controlled by the lift line. After several exercises, kite-flying people will soon master the skills of controlling kites: when flying kites, they usually pull and release kites.