Why don't planes dare to fly over Tibet? These 4 reasons are very important, after reading the experience
As the economy develops better and the level of science and technology continues to improve, China's transportation system is becoming more and more mature. Many cities have built airports, and flying has become one of the most convenient ways for residents to travel .
There are countless planes soaring in the sky every day. I believe that everyone has heard the sound of "rumbling" in daily life. It is the sound of the plane passing overhead, and even a long white smoke is left behind.
The flight routes of the planes are all set, including the flight height and route width. Even if there are no "traffic police" and " traffic lights " in the air, and countless planes are hovering in the air, they will not "collide" with each other.
In order to facilitate the travel between provinces and cities, the plane will circle over the Chinese territory, but the real-time image of the plane shows that the sky over Tibet is deserted. Why is this?
Why don't planes dare to fly over Tibet? These 4 reasons are very important, after reading the experience
Tibet is jokingly called the air restricted area, which is often caused by the following reasons:
1. Tibet is too high above sea level
According to the data, the flight altitude of civil aircraft is between 6,000 meters and 12,600 meters. Due to different flight tasks, flight routes, and flight areas, as well as special circumstances that may be encountered, the specific flight altitudes are different. The reason why the flight altitude is limited is that the higher you fly, the thinner the air, and the plane may "starve" and stall.
The Tibet region is a high mountain area, with an average altitude of over 4,000 meters. The height of Mount Everest alone is close to 9,000 meters. If the plane flies over Tibet, it may crash into the mountain.
2. It is difficult to handle when a fault occurs
The terrain in Tibet is complex and the mountains are continuous. In the event of an accident, it is difficult to find a flat and suitable emergency landing point in time. Whether it is to change the flight route or adjust the flight altitude, it is very difficult. The wider the area, the more difficult it will be for rescue teams to search.
3. Airflow is too complicated
It is believed that many people may have encountered bumps in the plane during the flight. At this time, the crew will broadcast the situation, and in most cases, it is because of the air current.
It should be known that the aircraft is easily affected by the airflow during the flight. Only in a stable airflow layer can the aircraft fly smoothly. Those who understand aerodynamics should know that the top of the wing of the aircraft is arched. During the flight, the airflow above and below the wing "games" each other. The pressure on the side with the larger airflow is smaller. When the flow rate is greater than the bottom, it will give the wing an upward lift, so that the plane can fly smoothly in the air.
But Tibet belongs to the plateau area. The undulating mountains and the volatile climate will cause the airflow to become turbulent and violent, with great uncontrollability, and it is difficult to predict its changes ; The lift may be insufficient.
The size of the airflow directly affects the degree of turbulence of the aircraft. If it encounters a normal small airflow, the aircraft may be bumped for a while and then return to normal. However, if it encounters a turbulent and long-lasting airflow, the aircraft is likely to stall and fall quickly. machine, the consequences are unimaginable.
And the airflow will also interfere with light waves, sound waves, electromagnetic waves, etc. , which may cause the aircraft signal to be interrupted and the communication with the ground to be cut off.
4. Fuel may freeze
Fuel is the " blood " of the aircraft, and whether the fuel freezes or runs out, it will cause the aircraft to have a flight accident. The higher the plane flies, the lower the temperature will be, and the fuel may freeze, but the Tibet region must fly to an altitude of at least 10,000 meters.
In addition, the Tibet region is covered with snow all year round, especially the Mount Everest mountain range. The average annual temperature is close to minus 20 degrees Celsius, and the average temperature in winter is even lower, close to minus 30 degrees Celsius, and the lowest can reach minus 50 degrees Celsius; and the freezing point of aviation fuel is At minus 47 degrees Celsius, if the fuel freezes, it will undoubtedly lead to the death of the machine.
In addition, if the temperature is too low, water molecules in the air will condense into ice and gather on the wings of the aircraft, which may reduce the lift of the aircraft and increase the difficulty of aircraft control; if the ice on the left and right wings is uneven, there may be It will affect the balance of the aircraft , and if the equipment such as the communication antenna freezes, the communication will be blocked.
In addition, the high, cold and windy regions in Tibet, the weather is fickle , and the sudden strong winds and the snow all over the sky will also lead to increased fuel consumption, weakening the endurance of the aircraft, and may not be able to reach the destination smoothly.
Since the flight altitude of the aircraft is limited, the higher the flight, the lower the temperature. If the flight altitude is lowered to avoid fuel freezing, it will increase the possibility of the aircraft hitting the mountain. Therefore, the pilot will undoubtedly be caught in a dilemma. .