Will there be any changes to the plane when it flies on the plateau?

Today's business jets are all cruising at high altitudes, so there is no problem flying on the plateau.

But take-off and landing is different, the plateau air is relatively thin, in the plateau its fuel supply, speed, engine exhaust temperature, will be significantly higher than the sea level.

The aircraft accelerates slowly, is prone to overload, and it is difficult to reach take-off thrust.

In addition, due to the low density of the air, the APU (auxiliary power unit) will also be affected, resulting in the failure of the start-up aircraft.

The air density on the plateau is small, and the take-off and landing distance of the aircraft is long, and it is easy to rush out of the runway. The performance of the engine decreases, so the engine margin is low and can not fly to the plateau airfield. In addition, the climate in the plateau area is changeable, and I often encounter strong turbulence and turbulence, which I will encounter every time I fly to Kunming, which makes me feel airsick.

There is also Jiuzhaigou Huanglong Airport, known as "Nine Yellows and Nine Yellows, Ten Flights and Nine Yellows", which are often delayed or returned, because the weather in the plateau area is harsh and changeable.

I know that the prototype aircraft is equipped with a passenger oxygen system than the normal model, and the oxygen level of the crew is also higher than that of the normal type.

Supplement: It is difficult to adjust the field pressure of the plateau airport to the barometric altimeter, so the high air pressure cannot be used at the plateau airport.

Why doesn't I get altitude sickness when flying?

The difficulty of the aircraft to perform the plateau mission lies in the low air density of the airport scene due to the high altitude, which makes the engine of the aircraft operating in the plateau airport prone to overtemperature and overrotation, and the take-off and landing performance is also greatly affected.

During takeoff, the engine thrust is significantly reduced, the acceleration is weak, the ground speed is large, and the space speed is small, so that the take-off distance is lengthened; In terms of landing performance, due to the influence of low air density, the ground speed of grounding is larger, and the aerodynamics of the aircraft control surface are low, resulting in a longer landing distance.

For some high plateau airports around the Qinghai-Tibet Plateau in China, its elevation has exceeded the general aircraft take-off and landing environment envelope, and the aircraft must be modified to improve the environmental envelope, and for Lhasa and Nyingchi airports in the hinterland of the plateau, the cockpit oxygen supply equipment needs to be modified to ensure that there is enough supplemental oxygen under the condition of cockpit pressure relief.

Most plateau airports fly, the airport clearance conditions and meteorological conditions are relatively harsh, the obstacle crossing performance of the aircraft is high, and the requirements for the crew's handling ability and decision-making ability in bad weather are also much higher than those of general airports.

When the passenger plane is flying at high altitude, the cabin is sealed, and the air pressure and oxygen content are basically the same as those on the ground, so there will be no altitude sickness.

If you go to a place at a high altitude, it is easy to get altitude sickness. The various discomforts caused by exposure to the low-pressure and hypoxic environment of the plateau above 3,000 meters above sea level are common diseases unique to the plateau area. Common symptoms include headache, insomnia, loss of appetite, tiredness, difficulty breathing, etc.

You can take some drugs to relieve altitude sickness: Rhodiola rosea, Omo blue tablets, glucose solution and other drugs to relieve altitude sickness have a certain effect.

Because altitude sickness is in an open environment, and the plane is a closed environment, the oxygen in the plane is generally enough for people to breathe. Therefore, there will be no altitude sickness.

Because passenger planes have special enhanced oxygen equipment, the cabin is pressurized after the plane flies to a high altitude, so that the atmospheric pressure is about the same as on the ground, and people will not have altitude sickness when they take the plane.

Because a large amount of oxygen is stored on the plane, and the plane is moving at high speed, there is no altitude reaction.

Why doesn't I get altitude sickness when flying?

The Tibetan Plateau is a particularly beautiful place, and with endless grasslands, many people dream of such a trip. However, many people will find some altitude sickness after arriving on the Tibetan Plateau, and this reaction is very uncomfortable, and even leads to death in severe cases. But for airplanes, they tend to fly at an altitude of 10,000 meters, and it stands to reason that he is much higher than the altitude of the Qinghai-Tibet Plateau, so why don't passengers have altitude sickness at this time?

In fact, the so-called altitude sickness is not that the higher the place, the more likely it is to appear. This is mainly due to the high air pressure in low-lying places such as the plains and the seaside. If you come to the plateau, then it is equivalent to being exposed to a low-pressure and low-oxygen environment, so the body's various functions can not adapt to this environment, and altitude sickness will occur.

However, when we fly, the altitude may be much higher than the world's highest Tibetan Plateau, which is also much higher than the world's highest Mount Everest. However, at this time, no one on the plane was experiencing altitude sickness. The main reason for this is alsoBecause the cabin of the aircraft is completely closed to the environment outside the aircraft, and the air pressure in the cabin of the aircraft will basically remain at atmospheric pressure, which is similar to what we usually come into contact with, so there will be no altitude sickness.

Therefore, the decision to determine whether a person will have altitude sickness is not based on the altitude at which everyone is located. For example, for those astronauts in space, their altitude has even surpassed that of the Earth, so how can they not suffer from altitude sickness? This is mostly the sameBecause the air pressure in the International Space Station or spacecraft has been kept stable, there will be no altitude sickness.

For example, there are many people who will have altitude sickness when they get to the altitude early in the morning, butThe train carriages running on the Qinghai-Tibet Railway in China are also completely closed, so altitude sickness will not occur for passengers on the train. But once you get off the train, the air pressure drops suddenly, and for those who can't get used to it, altitude sickness comes with it.

I believe that friends who have been to the plateau know very well how uncomfortable altitude sickness is. People living in the plains are prone to severe discomfort when entering the plateau above 3,000 meters above sea level.

Why do those people go to Qinghai-Tibet and other plateau areas to have altitude sickness, but when we take a plane that can reach an altitude of 10,000 meters, it is higher than the Qinghai-Tibet Plateau and Mount Everest, but we have never heard of people having altitude sickness on an airplane?

This is because although the aircraft flies high, the cabin of the aircraft is closed to the outside of the aircraft, the cabin is in a closed pressurized state, and there will be an oxygen supply.

The atmospheric pressure in the cabin is basically the same as the air pressure that people are usually in, so people will not have severe altitude sickness due to the low air pressure in the plane.

Therefore, it is not the altitude at which a person is located determines whether a person will have altitude sickness.

At present, civil aircraft usually maintain the pressure in the cabin close to about 2,000 meters above sea level, even so, many people still feel a certain sense of discomfort.

For example, many people will feel their ears swollen after taking off, and some people will feel that eating is tasteless and drowsy, and their taste buds may not be so sensitive in the air, causing people to feel that in-flight meals are not delicious.

Why not increase the pressure in the cabin a little bit closer to the pressure level on the ground?

In fact, this is also the result of balance. Imagine what happens when you release a high-pressure balloon into the air? At a certain height, balloons usually explode due to excessive pressure in the ball.

In the case of cabin pressurization, the plane actually becomes that balloon. Many aircraft look elliptical in the ground cross-section, and become round in the air, and the greater the cabin pressurization level, the greater the structural strength requirements of the aircraft.

Because when people are on the Qinghai-Tibet Plateau, they are actually in direct contact with that kind of air pressure.

The aircraft automatically releases oxygen into the cabin at different altitudes.

Because there is plenty of oxygen in the planes, and there is no oxygen on the plateau.

Because the environment inside the plane is different from the Qinghai-Tibet Plateau, the human body can slowly adapt.

Airplanes are confined spaces, and the oxygen content is artificially interfered with.

Because there is a certain amount of air storage in the interior space of the aircraft.

Because it takes strength to climb the Qinghai-Tibet Plateau, and it is effortless to climb the plane.

Because the oxygen inside the plane is different from the plateau.

The planes are all at an altitude of 10,000 meters, why don't the passengers have altitude sickness?

When the plane flies to an altitude of 10,000 meters, we will feel that there are streams of air in the plane.

The air on the plateau route is thinner than that of the normal route, and the weather is changeable, which leads to a lot of difficulties when taking off.

Because when the aircraft is flying at high altitude, the compressor will absorb the air in it, and through complex processes such as pressure regulation, it will be converted into breathable fresh air. However, flying on a relatively high altitude can cause altitude sickness.

The take-off conditions of the plateau are different from those in other places, the plateau atmosphere is thin, and the weather conditions are complex, which will reduce the thrust of the aircraft engine and enhance the vacuum speed of the aircraft, and the simultaneous existence of the two factors will increase the difficulty of the aircraft taking off.

The weather changes rapidly and is difficult to control, which is extremely demanding for the pilot, and the air pressure on the plateau is lower than usual, making it difficult for some aircraft to exert its ability to propulsively.

The plateau has a thin atmosphere and complex weather conditions. Atmospheric factors are the main reason why it is difficult for aircraft to take off on plateaus.

1. With the same take-off and landing weight, the vacuum speed of the aircraft (the speed of the aircraft's movement in the air) is much larger than that of the plain, and the thrust of the engine is significantly reduced when operating at the plateau airport.

2. The thrust of the engine at the plateau airport decreases, the aerodynamic force becomes worse, the maneuverability of the aircraft decreases, the climbing and obstacle crossing ability of the aircraft becomes worse, the distance required for acceleration and deceleration in the air increases, and the turning radius increases.

3. The altitude of the plateau airport is high, because the high-altitude wind is usually very large, the air close to the ground is heated unevenly in the sunny and shady directions due to the sun's irradiation, coupled with the blocking and acceleration of the wind by the terrain, so that the plateau airport often has strong winds, and the wind speed and wind direction change greatly, which is easy to form turbulence, turbulence and wind shear.

4. The temperature difference between day and night at the plateau airport is large, the weather is complex and changeable, there are obvious time differences, and there are regional and local characteristics. Different plateau airports have their own different characteristics, such as floating dust, blowing sand, thunderstorms, blizzards, cumulus clouds, thunderstorm clouds, low clouds, dense fog, low visibility, icing, low temperature, etc., which are very unfavorable to flights, pose a great threat to safety, and have a great impact on the normality of flights.

Because the air pressure on the plateau is relatively low, it will have some bad effects on the aircraft.

Plateau routes are difficult to operate and risky, often facing complex terrain, changeable weather, thin air, oxygen-deficient environment and other risk factors, which require the crew to pay more energy and physical strength than when flying to the plain airport.

The operation of high plateau routes is difficult and risky, and they often face complex terrain and changeable weather.

The general plateau route is different from the ordinary plain route, and has higher requirements for aircraft and flight technology.

Because people sit inside the plane, the plane is made with special treatment, so it alleviates people's altitude sickness.

This is because the airplane is a confined space and does not allow people to feel the air pressure outside.

The reason for this depends on the difference between the two.

I think it's because there's always enough oxygen in the plane.

It's in cruising mode, but the question you asked is problematic, if you just say that the plane flight altitude is constant, it is stable, if the speed is also constant, it is cruising state.

During the cruising phase, the altitude and speed are about the same, and unless you avoid bad weather, you can turn on autopilot during the cruising phase.

Cruising altitude: The flight state after the aircraft completes the take-off phase and enters the predetermined route is called cruise.

Aircraft engines have different working states, and the speed at which the engine travels with the least amount of fuel consumed per kilometer is called cruising speed. The cruising speed, cruising altitude and range of aircraft equipped with different engines are determined according to the distance of the aircraft, the time required, the load requirements, the safety of the flight, the durability and economy of the engine, and the climatic conditions.