The principle of bamboo dragonfly spinning and soaring is the same as that of modern times.

The principle of bamboo dragonfly spinning and soaring is similar to that of modern helicopter rotor.

Structure and function of bamboo dragonfly

Bamboo dragonfly is a kind of flying toy which originated from China tradition. It is made of bamboo, paper and other materials, and has unique rotating and ascending flight characteristics. The main parts of bamboo dragonfly include rotating blades, pillars and ropes. The blade rotates under the pull of the rope, generating upward buoyancy, thus realizing soaring.

The principle of bamboo dragonfly spinning and soaring can be simply understood as the principle of lifting force generated by blade rotation. When the rope is pulled quickly, the blades start to rotate, and the rotation produces airflow, which forms a large aerodynamic resistance. At the same time, due to the change of the angle between the blade and the pillar, the upward buoyancy is generated, which pushes the bamboo dragonfly to fly upwards.

The principle of rotor used in modern helicopters is similar to that of bamboo dragonfly. The rotor of a helicopter is similar to the blade of a bamboo dragonfly, which generates lift by rotating. The rotor of a helicopter is composed of one or more rotor blades, which generates airflow through rotation, forming greater aerodynamic resistance and generating upward buoyancy, so that the helicopter can take off, land and hover vertically.

There are similarities between bamboo dragonfly and modern helicopter in the principle of rotating flight. They all use rotation to generate airflow and generate lift through the action of airflow, thus realizing soaring. However, bamboo dragonflies spin and soar by pulling ropes with human power, while modern helicopters fly by driving rotors with engines.

The front wings of the bamboo dragonfly break the airflow to form downward thrust, and the wings of the helicopter will also generate convection force to support the fuselage. They also need to rotate around the vertical axis to maintain balance. During the flight, the bamboo dragonfly will rotate continuously along its own longitudinal axis, and the helicopter and helicopter will rotate around the nose along the longitudinal axis to keep the fuselage horizontal and balanced and in the same direction.

Bamboo dragonfly is an ancient children's toy in China. Its shape is T-shaped, with a horizontal bar like a propeller and a small hole on it. When a straight bamboo stick is inserted into it, the bamboo dragonfly will fly into the sky and then fall to the ground when the lift is weakened. In the process of making and playing bamboo dragonflies, we can appreciate the fun of ancient children's toys in China and the mystery of science and technology.