Why does the airflow rise after a few flaps of the wings when the geese fly south5

Because when their wings are flapping, the air flow above the wings is slow.

So that's how the lift is generated, and that's how it works in airplanes.

That's because if it doesn't flap its wings and fly, it won't see its mother.

When the plane encounters an air current, it is called dangerous if the big wings do not shake, and the shaking is normal.

The big wing is the lift of the aircraft, when the ground is parked, the engine hoisted below, the fuel inside, the weight is very large, it must be slightly sagging, after takeoff, the lift on the two big wings to hold up the whole aircraft, the aerodynamic load is very large, so the big wing must be slightly raised up. If the hardness of the beam of the big wing is too large, the toughness will be low, and the wing root part can not withstand too much bending moment, which is prone to stress fatigue and cracks, which is so dangerous.

This is not dangerous. Aircraft are subjected to pressure tests before they leave the aircraft, the most important of which is the pressure test of the wings. The criterion for passing is probably that the wing must be subjected to four times the weight of the fuselage!!

So encountering air currents or something doesn't pose a danger at all.

Here's an example: someone did an experiment by hanging a weight on the wing, and as a result, the wing was bent for four meters without breaking, and the wing returned to its original shape after the weight was removed!! This is enough to say about the solidity of the wing.

Not dangerous, if there is danger. Isn't that just a plane crashing every day? Aircraft wing shake does not absorb vibrations to reduce cabin vibrations. Airplane wing shake is shaken by air currents. It's normal to encounter air currents in the sky.

It is normal for an airplane to encounter airflow shake in the air, and there is no danger, but it is not like the shock absorber on the car tires, so I don't know, this problem is more advanced.

Yes, the strong turbulence of the aircraft can easily cause fatigue damage to the fuselage, and the strong downdraft will cause the sinking rate of the aircraft to be too large, resulting in excessive wing load. However, it is safe to fly as the plane will avoid the danger zone, which is a small probability event.

There will be turbulence after the aircraft enters the clouds, especially in the light cumulus clouds and heavy rain areas, but it is relatively stable when flying in clear skies. However, in the clear blue sky, there are sometimes undercurrents hidden under the calm sea, and occasionally there will be strong turbulent air currents, which cause the aircraft to produce strong turbulence, that is, "clear sky turbulence". It is generally generated at an altitude of more than 7,000 meters, with a width of about 100 kilometers and a thickness of about 1,000 meters.

Although this kind of turbulence is unlikely to cause a vicious flight accident, improper handling by the crew can also cause serious injuries to passengers and even endanger personal safety. When the aircraft encounters turbulence in the clear sky, the crew will take measures to get out of the turbulent area, and passengers should pay attention to the "fasten the seat belt" warning light above the seat, and when the light is on, fasten the seat belt in time to prevent accidents.

Definitely not, if it were, the planes would have been gone. For example, which is easier to break, a piece of wood or a flexible glue stick?

The density of hot air is small, and the density of cold air is high, and under the action of gravity, the cold air flow moves downward, so the hot air flow rises.

This involves the issue of cyclones.

A cyclone forms in the center of the hot air.

Causes the surrounding air to flow towards the center.

The air flow in the center was forced to rise upwards.

Thermal expansion and cold contraction, the volume of the hot air flow is large, the density is small, and the density of the relative cold air flow is much smaller than that of the hot air flow, so it rises.

The density of hot air is low, so the upward flow produces a hot air flow.

It's like the truth that hot water rises when you boil water.

The density of the hot air flow is small.

The density of cold air flow is high.

When the cold airflow drops.

So they squeezed the hot air up the air.

First of all, the aircraft must be adjusted to flight stability, and the control must be relatively proficient. Because gliding through an updraft is like holding a boat in a rough ocean, the pilot has to feel the location of the updraft in a bumpy aircraft and rush into it, and it is difficult to feel the actual air flow if the plane itself is unstable.

Capture the updraft mainly depends on the flight state of the aircraft to judge, when the aircraft enters the updraft, the aircraft will have a tendency to look up and slow down, at this time if the speed of the lever will be further reduced, but the stall will occur later than when not flying in the updraft, if there is this feeling, it proves that the aircraft is in the updraft, it should start circling.

There are two types of updrafts, one is the slope wind and the other is the thermal airflow, the slope wind is the wind that blows upwards after the wind passes through the obstacle, this wind cannot make the aircraft fly high, but it can maintain the altitude. Thermals are airs that flow upwards as they become less dense after absorbing the sun's heat, and thermals can make airplanes fly high. The method of controlling these two winds is different, in the slope wind, the aircraft usually has to move against the wind to stay in the rising air, but in the hot air flow the aircraft should hover and move downwind, in the hot updraft there is usually no crosswind, DLG can be used with less manipulation to circle and ascend steadily.

Thermals usually appear downstream of the wind, because the flow of the updraft should absorb the surrounding wind to replenish it, if the day is blowing the north wind, suddenly the wind calms down or changes to the south wind, it is very likely that there is a strong updraft in your north, after the plane has ridden an updraft, after flying to a certain altitude, the airflow disappears, you should first look at the direction of the wind vane, and give priority to flying the aircraft to the direction of the wind vane. However, if the prevailing north wind blows that day, and the north wind suddenly strengthens, it does not mean that you can find the airflow by flying south.

Flying hot air currents are mainly judged by the flight attitude of the aircraft, which is the most reliable. The theory is just speculation, according to the theory, it is difficult to generate thermal currents on the surface of the water, but I once tried to fly on a river for an afternoon, and the total number of shots did not exceed six times, each time with a flight time of nearly 10 minutes, and then I could not fall off after somersaulting and stunts. Therefore, the flying hot air flow mainly depends on the constant search and skillful maneuvering of the aircraft, there is no absolute law, basically as long as there is a blue sky, there must be an updraft, and its frequency and intensity vary depending on the weather conditions.

If you spot a girl in a skirt on the side of the road and you see her skirt blowing, congratulations, you've found an updraft.

Hot air rises! Do you feel hot? It's an updraft! The answer on the first floor is classic!

1. Human beings burn a large amount of coal, oil, natural gas and other fossil fuels, emitting a large amount of carbon dioxide into the atmosphere.

2. Human deforestation, especially the serious damage to tropical forests, has rapidly reduced the carbon dioxide absorbed and fixed by forests.

Mosquitoes are one of the insects with the fastest frequency of wing vibrations, which can slap 600 times per second, while small mosquitoes (midges) can reach up to 1,000 times per second. Mosquitoes have narrow wings and need to vibrate quickly to maintain a certain flight speed.

Mosquitoes flapp their wings 600 times per second and can fly 1-2 kilometers per hour.

I don't have as much detail as the one on the first floor, but it's all I found in the book The World's Best.

The convection of hot and cold air can produce an updraft, which is simply a fire.

The butterfly effect is a concept in chaos theory. It refers to a phenomenon of dependence on the sensitivity of the initial condition. Small differences in the input can quickly be amplified to the output.

The butterfly effect abounds in economic life: China announced missile launches, and $10 billion from Hong Kong and Taiwan went to the United States. The "butterfly effect", also known as the "billiards effect", is a visual term for "chaotic systems" that are extremely sensitive to initial values, and is also the direct cause of chaotic phenomena in nonlinear systems under certain conditions (which can be called "critical conditions" or "threshold conditions").

The butterfly effect was proposed by meteorologist Lorenz in 1963. It is to the effect that a butterfly in the rainforest of the Amazon basin in South America, with a few occasional flaps of its wings, could cause a tornado in Texas, USA, two weeks later.

The reason for this is that the movement of the butterfly's wings causes changes in the air system around it, and causes the generation of weak air currents, which in turn cause corresponding changes in the air or other systems around it, which causes a chain reaction, and eventually leads to great changes in other systems. This effect shows that the result of the development of things is extremely sensitive to the initial conditions, and the slightest deviation of the initial conditions will cause great differences in the results.

It's butterflies that flap their wings in the tropics, and they create air currents, and then they cause meteorological factors such as air pressure to change, and the changes spread and expand, and eventually lead to a hurricane in the other hemisphere.

Of course, all this is only theoretical.

The butterfly effect refers to the fact that in a dynamical system, small changes in the initial conditions can lead to a long-term huge chain reaction of the whole system. It's a chaotic phenomenon. A butterfly flapping its wings in the tropics can cause a hurricane in a faraway country.