Aircraft fuel is so expensive, why does the captain still have to release fuel in the air?

In order to reduce the weight on the aircraft and allow the aircraft to land safely, the weight of the aircraft is limited, and the weight of the aircraft cannot be exceeded, and if the weight is exceeded, it is easy for the aircraft to malfunction.

Because it has been said that if you don't release fuel, the landing of the plane will cause a lot of damage to the structure of the aircraft, and there is a possibility that the plane will crash. So if the weight is too large, the aircraft will be refueled in the air.

This is done for a better landing, because if there is oil, it will cause problems in landing, and it will be overweight.

Because in this way, the aircraft can fly smoothly, and it is also to ensure the performance and normal driving of the aircraft, and it is not easy to have dangerous accidents.

The plane should be lightweighted. When an aircraft needs to make an emergency landing, the overall weight of the aircraft needs to be kept within a certain range.

In such a situation, emitting aviation fuel is the best way to reduce the weight of the aircraft.

Because the plane is too heavy, the altitude of the flight is relatively low, so in order to reduce the weight, the fuel will be released, and the oil is released to be able to maintain a certain altitude.

It may be because there is too much oil on the plane, and then in order to ensure that it can land safely, it will be refueled, after all, the weight of the plane is very heavy.

We live in an era of advanced science and technology, and the means of transportation and aircraft have become the first choice for many people to go out, but do you know that before the plane lands, it needs to release fuel in the air, with a total value of up to 100,000 yuan. What is the reason for such a large-scale air oil release? There is generally only one reason for the release of oil in the air, and that is the emergency mortar.

Here's an example. A large passenger plane weighs 195 tons and weighs 220 tons when it is fully fueled, but its safe landing weight may only be 200 tons, when it arrives at its destination. It is possible to achieve a safe weight reduction when the fuel is running out.

However, once you encounter a dangerous situation halfway and need to be forced urgently, you must use the method of air fuel discharge to descend in the middle. Otherwise, the landing gear of the aircraft may not be able to withstand the huge impact, and the excess fuel may also be damaged by sparks from the aircraft hitting the ground**. There are two common ways to discharge fuel in the air, one is gravity discharge, which relies on the gravity of the fuel itself to discharge.

The other is power draining, that is, using the oil drain hole in the fuel tank as a power source to inject fuel out of the fire. This method is not limited by the engine position and is currently more widely used.

However, the oil is not discharged at will, but over the ocean, mountains or wastelands. At the same time, the altitude of more than 3,000 meters can ensure that there is no impact on ground facilities and personnel. Before the plane takes off, the ground crew will release water to the fuel tank, is the fuel tank mixed with water?

This is because gasoline is water-soluble. Jet fuel inherently contains a certain amount of moisture, but some of it may be drawn out of the oil as the temperature changes. The free water is present in the fuel oil, which may corrode the infrastructure and destroy the lubrication of the sports infrastructure.

If the temperature is too low, there is also a possibility of freezing, blocking the oil circuit and affecting the engine work, so the water in the fuel tank must be discharged in time. Safety is no small matter, there are so many doorways in a single fuel tank, and every detail on the plane is closely related to the lives of passengers, no matter how rigorous it is.

This is because during the flight, if the plane encounters a dangerous situation halfway, it needs to make an emergency landing, so it will take the method of refueling in the air.

When the plane lands, the requirements for the oil in the plane are very high, and if there is a lot of oil, the oil will be released in the air, which is also to ensure the normal operation of the aircraft.

In this way, it can provide power for the flight of the aircraft, which can reduce gravity, and the volatility of the aircraft in the process of flight is relatively strong, and it will not cause serious injury to people on the ground.

In case of danger, the weight can be reduced, so that people can land safely and return to the ground safely.

Causes:1 Since the maximum take-off weight of the aircraft is much greater than the maximum landing weight, if the aircraft requires a landing immediately after take-off due to a malfunction, then the landing weight at this time will exceed the maximum landing weight of the aircraft. In the event of a forced landing, there is a danger that the landing gear will break.

Also, will the oil release cause environmental pollution? You don't have to worry about this. Aircraft refueling is generally at an altitude of more than 3,000 meters.

The aviation kerosene, which is released at this height, has been atomized before landing.

1.During landing, many planes are constantly draining fuel. The main reason is that the take-off weight of the aircraft is much greater than the landing weight.

The purpose of defueling is to reduce the weight of the aircraft. If the aircraft is forced to descend, the aircraft landing gear may break without draining the oil, causing an accident.

2.Usually during a forced landing, the aircraft will rub against the air. If there is still a large amount of fuel on the aircraft, high temperatures may occur during the friction collision, causing disasters and even causing aircraft. Therefore, the aircraft needs to be defueled during landing to allow it to descend safely.

3.Because the airport is far from the city, and under the friction of the air, there is no need to worry about the oil discharged by the plane will be scattered over the city and the forest. Generally, oil is discharged into oceans, mountains, and wastelands. At atmospheric pressure, the oil may be atomized before landing.

I don't know if you have found such a phenomenon, sometimes when the plane is about to arrive at the destination, you will see a long string of white smoke behind it, this is the phenomenon that the plane is refueling, why should it be refueled.

There are several main reasons for aircraft mid-air refueling:

1.Avoid overloaded take-offs. There is a limit to the amount of fuel an aircraft can carry when it takes off, and exceeding the limit can affect the performance and safety of the aircraft.

2.Increased range. With in-flight refueling, the Trouser can carry more fuel to farther destinations. This is especially important for military and civilian aircraft that need to fly long distances.

3.Fuel is guaranteed in case of emergency. After the aircraft is refueled in the air, even if it cannot land due to bad weather at the destination during the flight, there is enough spare fuel to fly to other airports for diversion or return to the place of departure, which increases the safety of the flight.

4.Change your focus and increase efficiency. Fuel consumption will change the weight and weight of the aircraft, affecting flight performance. By draining fuel in the air, the weight and position of the fuel on board can be changed according to actual needs, maintaining the optimal center of gravity and efficiency.

5.Economic considerations. Some small aircraft have a smaller maximum take-off weight limit, but they can achieve a longer range by refueling in the air, which can save the economic losses caused by landing and take-off to a certain extent.

Therefore, the main purpose of aircraft in-flight refueling is to increase flight mileage and flexibility, improve flight safety and performance, and consider economic benefits to a certain extent. This technology plays an important role in both civil and military flights. Of course, in-flight refueling also adds a certain degree of difficulty and risk, requiring pilots to have sufficient skills and experience to operate.

Hopefully, this explanation will help you understand why aircraft need to be defueled in the air. If you have any other related questions, please ask them here and I will be happy to answer them in detail.