How does a paper airplane fly?

The main fact of the flight of all heavier-than-air objects is this: the wings make the plane rise by forcing the air downward. This is an overview of the principles by which all heavier-than-air aircraft are lifted into the air in the book "Joysticks and Rudders".

The wing pushes the air down with the lower surface and the air down with the upper surface, the latter of which is more important. However, what we really need to understand is that the wing forces the air downwards in one way or another. When a downward force is applied to the air, the wing experiences an upward reaction force – a principle also known as the law of action and reaction (Newton's third law).

Based on the same principle, the gun will have a recoil phenomenon while firing a bullet forward; The nozzle of the fire hose pushes the firefighter back heavily while spraying a jet of water forward. Air has weight, and each cubic meter of air at sea level weighs about kilograms. Therefore, when the wing constantly exerts a downward force on cubic meter after cubic meter of air, the wing is subjected to an equally huge upward reaction force.

That's why the plane was able to go up. According to Newton's laws, if the wing forces air downward, then the air must push the wing upwards. In other words, if the wing needs to support the aircraft in a fluid of air that is constantly deformed under pressure, it can only be achieved by forcing the air to flow downward.

All the complex physics in Bernoulli's theorem, all the advanced mathematics in fluid mechanics, and all the diagrams showing the air flow around the wing, only elaborate in more detail how applicable Newton's laws themselves are. For example, there is a very interesting but really useless (for pilots): the wing uses its upper surface to do most of the downwash of the air stream by suction.

Focusing on the theories of Bernoulli and Plante in order to understand how to fly an airplane is like studying the movement of the rubber molecules in the ball when it hits the court and the movement of the racket on the net when hitting the ball in order to understand the motion of a tennis ball. Why not simply observe the bounce of the ball? I guess it's a similar principle for paper airplanes.

Airplanes are able to fly because the wings have an angle of attack that allows the air to flow downwards and thus rise on its own. <>

There are a few things to pay attention to when it comes to paper airplanes flying high and for a long time:

1) Try to fold both sides symmetrically, if it is not symmetrical, the plane is easy to turn, and it will not fly far;

2) The ratio of wings to the fuselage should be appropriate. The fuselage is small and the wings are large, and the lift of the aircraft is enough, but the center of gravity is raised, and the plane thrown out is easy to flutter; The fuselage is large and the wings are small, the center of gravity is too downward, and the plane is like a dart, full of inertia, but it has lost the flight and gliding trip, as if it is a ball of paper thrown out. The correct and reasonable ratio of wings and fuselage should be determined according to the shape of the paper airplane and the texture of the paper.

3) Pay attention to the balance between the front and back. The nose of the aircraft is too heavy, and the plane is easy to plunge headlong into the ground; The nose is too light, and it is easy to cause the nose to tilt, resulting in stalling. The balance of the aircraft can be adjusted by adjusting the shape of the paper airplane, or by making appropriate loading with strips of paper or tape (if allowed);

4) Finally, the throwing of paper airplanes is also very particular: do not throw crosswind, otherwise it is easy to be scraped off; There is also not enough power to throw downwind; It is best to throw against a not too strong headwind, the angle of the throw is slightly greater than the horizontal angle, about 15 degrees, the plane should be sent forward smoothly, and it will not be taken off naturally until the last moment, so that it will fly the farthest.

Anyone can fold paper airplanes, even if you look at the picture can not do the same as mine, I will not send the picture, the key is to explore more yourself, to find out the best paper airplane structure and throwing strength.

I think the principle of lift of paper airplanes is the principle of lift of delta wings, because the plane has power when it is thrown, and it has a certain angle of attack.

Therefore, the ring volume will be generated on the wing, and the effect of the ring volume makes the velocity of the fluid on the lower surface of the wing lower than the velocity of the fluid on the upper surface, and the pressure on the lower surface of the wing is higher than the pressure on the upper surface, and the high-pressure airflow on the lower surface will overflow to the upper surface, and when the fluid on the lower surface moves to the upper surface, a vortex is formed to have an accelerating effect on the fluid on the upper surface of the wing.

Increase the velocity of the fluid on the upper surface, the faster the fluid velocity, the lower the static pressure. This vortex lift, together with ordinary lift, makes up the lift of paper airplanes <>

To put it simply, the flight of paper airplanes is formed by the interaction of two forces, gravity and lift. The weight of the paper airplane itself pulls the fuselage downward, and the wings grab the air, causing the paper airplane to float in the air. The two forces of one up and down, plus the power of the thrower to help the paper airplane glide forward - produce inertial motion and slide out of the trend, the balance of the three forces can fly a beautiful attitude.

How does a real airplane fly A real airplane is affected by gravity, lift, thrust, and drag, gravity refers to gravity, thrust refers to the thrust of the airflow generated by the turbine of the aircraft, and drag refers to the force of the air that affects the flight of the aircraft. Therefore, when the thrust and lift generated by the turbine of the aircraft are greater than the gravitational force and drag of the earth, the plane will naturally soar in the sky

The upper surface of the paper airplane is slightly convex upward, so that when flying, the air velocity on the upper surface is greater than that on the lower surface, so that the upward air pressure is greater than that of the upward one, so as to obtain greater lift.

It is possible to fly, and the flight path made of paper is a parabola.

A paper airplane is a toy airplane made of paper.

As long as it is a paper airplane, it can be called a paper airplane. Origami airplane It is the most common form of origami handicraft in aviation, which belongs to a branch of origami handicraft and also belongs to a type of paper airplane. Since it is one of the easiest types of origami to master, it is loved by beginners and even experts.

Toys made from paper are thought to have originated in Greece 2,000 years ago, when "kites" were a popular pastime. But it's not the same compared to paper airplanes.

A paper airplane is a toy airplane made of paper. It is probably the most common form of aeronautical origami handicraft, which belongs to a branch of origami handicraft. Since it is one of the easiest types of origami to master, it is loved by beginners and even experts.

The simplest way to fold paper airplanes can be done in just 6 steps. Now, the term "paper airplane" also includes those made of cardboard.

Origin Development:

A paper airplane (scientific name: autonomously powered aerodynamic physical model) is a toy airplane made of paper. It is the most common form of aeronautical origami handicraft and belongs to a branch of origami handicraft.

Since it is one of the easiest types of origami to master, it is loved by beginners and even experts.

The use of paper to make toys is thought to have originated in Greece 2,000 years ago, when "kites" were a popular pastime. But it's not the same compared to paper airplanes. The earliest paper airplanes dating back to the past were made in the West in 1909.

However, the most accepted method of production is now made by John Northrop (one of the founders of Lockheed) in 1930.

How to fold paper airplanes:

1. First of all, put the paper in the vertical direction, and fold the left and right sides to create a fold mark in the middle of the paper.

2. Open the fold in half, and fold the upper left and upper right corners to the middle fold.

3. Fold left and right according to the previous middle fold. This is followed by the most important step, which is the folding of the wings.

4. The paper is still placed in the vertical direction, and the paper on both sides of the blunt end (below) is folded outward instead of inward. A traditional paper airplane is complete.

Paper Airplane is a social software for chatting and making friendsUsers can use the software to expand their friends and contacts in a short period of time, whether it is ** chat or greeting is very interesting, the new design of the paper airplane chat window is also more simple, can support users around the world to chat and call. In addition, paper airplanes are protected by a strong encryption service to make calls safe and secure. On April 3, 2015, the Android version of the paper airplane was tested online in the application treasure.

The main function of paper airplanes.

2. Instant sharing: Send your life to 50 random strangers, and your joys, sorrows and sorrows will be shared from now on.

3. Meet the unknown: Every message received is unknown, and every moment can be the most wonderful chance encounter.

4. When the application asks for camera permission, you must choose to allow, so that you can use all the functions of Li Xiang without affecting it.

Paper Airplane is an application developed by a Russian programmer, and after installation, it defaults to the old Ming and does not use Chinese.

There is a slight difference between the steps of the sinicization of paper airplane Android and iOS,I wrote the answers of the two versions separately and the detailed steps are as follows:

The Android version of the paper airplane setting page is Chinese, and the steps are as follows.

1. Click the magnifying glass in the upper right corner.

2. Enter @zwbao and click on the displayed channel, pay attention to check that the letters after @ match exactly which one is.

3. First click the join button at the bottom of the screen, and then select a Chinese Simplified package button you like from the many Chinese Simplified packages in the channel and click it.

4. Click change in the lower right corner of the pop-up window to successfully switch to Chinese.

Apple's ISO version of the paper airplane setting page for Chinese steps are as follows.

Step 1: Once you've opened the paper airplane, first tap the chats button in the middle of the lower part of the screen.

Step 4 Click the join button at the bottom of the screen, then select your favorite Chinese Simplified package button from the many Chinese Simplified packages in the channel and click it.

Step 5 After clicking, there will be a pop-up window at the bottom of the screen, two options to choose from Click change to successfully switch to Chinese If you click cancel, it means that you will not switch. These Chinese translation packages in the channel are being updated.

Dear, hello, I'm glad to answer for you, paper airplanes and real airplanes fly differently. Paper airplanes are manually thrown by hand and fly by relying on the lift and drag of the air. When a paper airplane is thrown, it is subjected to the force of the throw and gravity, while the flow of air creates lift and drag.

The shape of the paper airplane, the position of the center of gravity, and the lightness of the paper affect its flight performance and stability. A real aircraft relies on engine propulsion, lift from the retarding wings, and stable control of the tail to achieve flight. The engines of the aircraft provide power, which creates thrust to propel the aircraft forward.

The shape and inclination of the wings generate lift, which is a key factor in the aircraft's ability to fly in the air. At the same time, by manipulating the tail, the pilot can control the attitude and stability of the aircraft.