Is the principle of a helicopter the same as that of a bamboo dragonfly?

Helicopter. Flight is by the propellers (propellers) on its head.

Rotation creates lift.

The most conspicuous place is the narrow and long broadsword rotor on the head, which is generally composed of 2-5 blades, driven by 1-2 engines, and its main role is to exert a huge downward force on the atmosphere through high-speed rotation, and then use the reaction force of the atmosphere.

It is equivalent to the upward force of the atmosphere on the helicopter) so that the aircraft can hang smoothly in the air.

The rotation of the helicopter's large propeller creates lift to balance gravity.

The blades of a helicopter are about 2-3 meters long, and generally consist of 5 blades.

When a helicopter takes off, the propellers turn faster and faster, and the lift generated is also increasing, and when the lift is greater than the weight of the aircraft, the aircraft takes off.

When the pilot adjusts the altitude during flight, it is only necessary to change the speed at which the large propeller rotates.

The main propeller rotates and presses the air down, and there is a net lift, but only the main propeller will rotate because of the rotation of the main propeller, what should I do? This has a tail rotor, the tail rotor provides reverse thrust, and the nose is pointed according to the size of the tail rotor thrust counterthrust, and the angle of the main propeller changes *** forward tilt and backward and sideways.

Ordinary airplanes in the wings.

When moving forward, the difference in airflow velocity between the upper and lower airplanes creates a pressure difference between the upper and lower airplanes, which is the lift. The wing fuselage does not move while the wings spin like windmill blades, forming a relative velocity with the air.

Lift can also be formed, so that the rotating "wing" becomes the rotor, and the lift generated by the rotor is the basic principle that it can take off and land vertically.

Bamboo dragonflies. The principle is the same as that of a propeller, which is a device that converts rotational power into propulsion by rotating the blades in the air. The propeller blade is a spiral surface, when it rotates, the force of air on the propeller blade can be broken down into an upward force and a force in the opposite direction of rotation, the faster it rotates, the greater the upward force of the decomposition, so that the propeller can rise.

Helicopters make use of this principle.

The principle of helicopter and bamboo dragonfly is the same, the rotor of the first class is like the blade of the bamboo dragonfly, and the rotor shaft is like the thin bamboo stick of the bamboo dragonfly, driving the engine of the rotor. The upper surface of the blades of the bamboo dragonfly is curved, and the lower surface is flat.

It's pretty much the same, but it's definitely a bit more technically difficult, and it requires more energy and precision.

The principle of the helicopter is definitely the same as that of the bamboo dragonfly, except that the helicopter is more sophisticated.

The principles are different, and the principles of the two things have different differences and gaps, so they cannot be compared.

Both airplanes and dragonflies have a function to prevent tremorsScientistsInspired by the dragonfly's flight, the problem of tremor during the flight of the aircraft was solved.

Dragonflies have a lot of flying stunts. In flight, they often take turns vibrating their forewings and hindwings, and suddenly they glide with their wings straight. Occasionally, only the front wings vibrate, while the back pair of wings are calmly extended.

Dragonflies can not only fly forward, but also backwards.

They vibrate their wings from time to time, stay stationary in the air, and even do short vertical flights when hunting prey.

Dragonflies

Dragonflies are carnivorous insects. They prey on flies.

Mosquitoes, leafhoppers.

A variety of agricultural, forestry and animal husbandry pests such as midges and small butterfly moths. Dragonflies are an important class of natural enemies that are beneficial to humans. "Dragonfly dotting water" is a biological feature of dragonflies laying their eggs in water.

The larvae (larvae) live in water and live for a period that varies depending on the species, ranging from 2 years to 3 to 5 years.

The above content is from Encyclopedia - Dragonfly

Bamboo dragonflies. The principle of lift-off is as follows: 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 follows the tilt angle of the blades.

When the inclination angle is large, the lift force is large, and the inclination angle is small. 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 save effort and fly high.

Bamboo dragonfly is one of the traditional Chinese folk children's toys, which is widely spread. The bamboo dragonfly consists of two parts. One is the bamboo handle. The second is "wings". When playing, rub your hands together, and then let go of your hands, and the bamboo dragonfly will fly into the sky.

After spinning for a while, it will fall. It is a very subtle little invention in ancient China, this simple and magical toy, once made Western missionaries.

Amazed, it was called the "Chinese Spiral". In the thirties of the twentieth century, the Germans invented the propeller of *** according to the shape and principle of the "bamboo dragonfly".

Categories: Social Livelihood >> Military.

Problem description: It is said that the helicopter flies on the principle of a dragonfly.

But *** is turning, and the dragonfly is shaking?

Puzzle ing Analysis:

If you are wrong, *** comes from the principle of the bamboo dragonfly gods, which is the toy we played with when we were children, it is a double wild oar, and the thing that flies when you rub it with your hands and then release it. The development has experienced rare twists and turns in the history of human scientific development, and it is much more difficult than fixed-wing aircraft, because its unique rotary-wing flight mode has brought too many technical obstacles, and it takes many technological advances to bring breakthroughs. However, in the future, the development trend of the first class is developing in the direction of combining the functions of the first and the fixed-wing aircraft.

The concept can be traced back to ancient Chinese bamboo dragonflies. According to well-documented historical records of hail socks, in the Jin Dynasty Ge Hong's book "Hug Puff" depicts the scene of vertical lift-off through the rotating bamboo dragonfly and the vertical upward pull force can be generated by the rotating propeller, It is considered to be the world's earliest description of the basic principle of vertical take-off and landing. Although these records lack reliable evidence, the contribution of bamboo dragonflies to the development of world aviation is universally recognized.

Long before the invention of hot air balloons, bamboo dragonflies were introduced to Europe as toys, and its wonderful vertical lifting principle was studied by Europeans as an aircraft. Many aviation pioneers in the West have learned some important aviation principles from bamboo dragonflies.

Bamboo dragonfly he uses the aerodynamics of the propeller to achieve vertical lift-off, this kind of toy invented by the Chinese during the Jin Dynasty, presumably everyone has played, when we rub our hands, and then look up at the sky with a face full of anticipation, we have vividly demonstrated the basic working principle of the modern *** rotor.

The British wrote in Volume 9 of the Concise Encyclopædia Britannica: "*** is one of the earliest ideas of human flight, and for many years it has been believed that it was Leonardo da Vinci who first proposed this idea, but now it is known that the Chinese made *** toys earlier than the Europeans in the Middle Ages." ”

Chinese inventions are usually borrowed and used by foreigners, the main reason is that I personally believe that China's "learning to apply" and ideology, we think that toys may become ** in the eyes of Westerners.

From the invention of the world's first manned flight off the ground in 1907 by the Frenchman Breguet, to the 1939 VS-300*** developed by the American Sikorsky officially entered the practical era, this kind of aircraft that can rise and fall vertically, hover and even fly backwards is well known.

From the principle of bamboo dragonfly to the use of science and technology development is to bring people unlimited imagination space, scientific and technological development is also the first driving force for the progress of the Chinese nation ......

Dragonflies and *** are biomimetic relationships.

Dragonflies vibrate by vibrating their wings to create locally unstable air currents that are different from the surrounding atmosphere, and use the vortices created by the air currents to make the state rise on its own. The dragonfly can soar with very little thrust and can fly not only forward, but also backward and left and right, and its forward flight speed can reach 72 km per hour. In addition, the flying behavior of the finger dragonfly is simple, relying on only two pairs of wings to flap constantly.

Scientists have successfully developed the structural basis based on this. When flying at high speed, the aircraft often causes violent vibrations, and sometimes even breaks the wings and causes plane crashes. Dragonflies rely on weighted wing moles to fly at high speeds, so dragonflies have been modeled after adding counterweights to the wings of airplanes to solve the thorny problem of vibrations caused by high-speed flight.

Scientists are based on. Dragonfly wings researched ***.