aircraft are now quite popular in our country, and larger cities have airports. Many people have taken flights, and they should have experienced it. Before the plane takes off, the runway is obviously empty, but they will still wait for a few minutes to taxi and take off. What are you waiting for?
The conditions for takeoff of the aircraft are relatively strict, and the runway, wind direction, forward plane distance, etc. need to be reviewed and adjusted before takeoff. Most airports in China only have one runway. Sometimes, although it is time to take off, because there are still planes in front of the runway that have not taken off, you need to wait a few minutes after the front plane takes off before taking off. The plane takes off and lands and takes a runway. When there are many flights that day, it is also common for the runway to be occupied by other aircraft.
and the time interval between the front plane took off should not be too close, because after the aircraft takes off, the front opportunity will have an impact on the airflow. If the rear plane follows tightly, it will be disturbed by the front plane airflow after takeoff, which will have a great impact on the safe flight of the aircraft. This situation has happened in the world once. The rear plane is affected by the front plane airflow, and the aircraft will eventually shake violently, and the engine will be damaged, so it crashes.
Therefore, my country's air control requirements are relatively strict. The two aircraft need to be far enough away, and the take-off interval should not be too close. After the front aircraft takes off, it must wait a few minutes before taking off. Before the plane takes off, you need to follow the instructions of tower and take off before you meet the takeoff conditions.
It is precisely because most airports in China have only one runway, so you will find that many planes will hover around the city for a circle or several times before landing after reaching their destination. Because the plane flew from all directions, but there is only one direction on the runway, in order to land smoothly, the landing direction of the plane must be adjusted. Only after the direction is adjusted can you land.
Sometimes, other planes may be landing before landing, or are waiting for takeoff, so you need to hover for a while. Why don’t the airport build a few runways? Because the length of the runway is generally about 3 kilometers, building more places covers too much area and is too high, and there is no need to do a good job in epidemiological investigation management.
