Does anyone know the principle of a flapping wing aircraft

The principle of the flapping wing aircraft is that, like birds, it can rely on the instigation of wings to produce anti-thrust and make the aircraft lift into the air. And according to the continuous adjustment of the tilt angle of the wing surface, the aircraft can fly freely forward, backward, left, right, and all directions. This kind of aircraft, instead of rotors and tails, he has only a pair of main wings that can be instigated and a tail that can swing freely.

In fact, as early as the 60s, this kind of flying machine that imitates the flight of birds has been developed, but it only stays on the small model, its character is very poor, not only does it not fly high, it does not fly fast, it does not fly far, the empty time is very short, and it is not easy to control, the main reason is that when the wings are stirred back and forth, the mechanical fatigue generated is very large, and all the materials of human beings can not effectively resist this hard fatigue, so the aircraft used by human beings now, All of them only imitate the movement of a bird when it glides, and it is not a flapping wing aircraft at all.

Aircraft that imitate the flight attitude of birds, that is, imitation bird flapping wing aircraft (referred to as winged bird aircraft) and their military and civilian applications. is a military project. Its contents include:

Fluid brake wing bird aircraft with the characteristics of high-pressure flow system wing; The air launch method has the characteristics of launching rockets from a high altitude, and the wing-bird aircraft with the characteristics of braking the wings using pulley ropes; a single-person semi-autonomous aerial vehicle with wings structure similar to that of a pulley, rope brake, and winged bird aircraft; It has the characteristics of using winged bird aircraft to quickly build bridges across rivers and beaches; Air Marines with raid characteristics and withdrawal characteristics after fighting; It has the characteristics of using winged birds, flying close to the ground, and using wind power to fan wings.

1. Principle of aerodynamics. Generally, the aircraft is started by the engine, and the air flow rate on the upper and lower sides of the wing is different, specifically the relative speed of the upper side is faster, so that the fluid pressure is reduced and a pressure difference is generated, and the aircraft gets lift.

2. *** is also the principle, but ***'s propeller is the ascending force generated by rotation.

3. The potato jet can obtain kinetic energy by recoil, and does not need to rely on the medium fluid of air, so it cannot fly in outer space, nor can it guess the propeller plane to the vertical ground, otherwise it will fall.

The upper arc of the lower plane, when running at high speeds, the air flow in the upper part of the wing is greater than the air flow in the lower part, which creates a pressure difference. The lower air pressure is higher than the upper air pressure to produce lift.

Simply put, a plane cuts the air, so that the air reacts on the plane, which is the generation of lift. It's like when we put our hands out of the window while driving, there will be a feeling of upwards.

Lift is closely related to the 3.

1. Wing area (the larger the area, the greater the force range).

2. Speed (the greater the speed, the more gas will flow through).

3. Wing angle (angle of attack) (the larger the angle, the more you will drive, but the greater the drag, so the wing angle has an optimal value, which is called the favorable angle of attack).

At a certain flight speed, the larger wing area and angle of attack undoubtedly provide greater lift to the aircraft.

The wings are actually like kites.

What is so special about the wings of an airplane? Demonstrate its flight principle in 3D, no wonder it can fly so high.

It is triangular, with a fast flow velocity and low pressure above, and a strong pressure below, giving the aircraft a lift.

As the relative airflow flows through the airfoil, the streamlines and flow tubes will change, causing a change in pressure around the airfoil, resulting in lift as long as there is a pressure difference in the lower airfoil. Due to the influence of the positive elevation angle and the outward convexity of the wing surface, the flow tube shrinks, the flow velocity increases, and the pressure decreases. On the lower surface of the airfoil, the airflow is blocked, the flow tube expands, the flow velocity slows down, and the pressure increases. In this way, there is a pressure difference between the top and bottom of the airfoil, and the total pressure difference perpendicular to the direction of the relative airflow is the lift of the wing.

Summary. Kiss Good afternoon and nice to you.

The ornithopter "is powered by a flapping wing (movable wings or wings), which is actually a flying robot that can flap its own wings." Developed by the Toronto Space Institute and SRI International, a non-profit research and development company based in Menlo Park, California, the Gate is the world's first hovering ornithopter.

Problems need to be addressed.

In order for the ornithopter to really come in handy, it has to pass several "technical hurdles". First, the researchers had to make the artificial muscles installed on the aircraft produce wing movements. Second, the researchers also had to enable the aircraft to slowly transition from hovering to horizontal flight.

Thirdly, the prototype consumes too much energy, is there a ornithopter with practical value that has been developed?

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Good afternoon Kiss Good afternoon I'm glad that you haven't made a practical flapping wing yet, the ornithopter "is powered by a flapping wing (movable wings or wings), which is actually a flying robot that can flap its own wings." Developed by the Toronto Space Institute and SRI International, a non-profit research and development company based in Menlo Park, California, the Gate is the world's first hovering ornithopter. It is necessary to solve the problem, and in order for the "ornithopter" to really come in handy, it has to pass several "technical barriers".

First, the researchers had to make the artificial muscles installed on the aircraft produce wing movements. Second, the researchers also had to enable the aircraft to slowly transition from hovering to horizontal flight. Debate the third, the prototype machine consumes too much silver, dear, I hope my answer will be helpful to you, but if you don't know how to do it, you can continue to ask Bi.

Finally, I wish you all the best and all the best <>

Happy.

An airplane is a heavier-than-air aircraft that can flutter up and down like the wings of birds and insects, also known as thopters. A flapping wing creates not only lift, but also forward propulsion. In 1930, an Italian model ornithopter was test-flown and weighed about a kilogram with a kilowatt (hp) engine.

In the design scheme of ornithopters, some are shaped like bats and have a film-like fluttering wing surface; Some are equipped with fluttering wings with gaps and flaps, which have the effect of bird's wings. The flight of birds and insects has shown that ornithopters require much less power than ordinary aircraft when flying at low speeds and have excellent vertical take-off and landing capabilities. However, it is very difficult to achieve complex movements such as the wings of birds, or high-frequency flapping movements like the wings of dragonflies and other insects.

The problems of control technology, materials and construction involved in the design of ornithopters have not been resolved. Ornithopters are still in the stage of making models and envisioning them. Despite this, there are quite a few scientists, engineers and hobbyists who devote themselves to the study of ornithopters.