What s going on with the airplane draining fuel in the air? Why put oil?

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.

Aerial refueling is of great significance in both military and non-military fields, in most cases if the aircraft lands immediately after take-off due to failure requirements, then the landing weight at this time will exceed the maximum landing weight of the aircraft, in order to reduce the weight of the aircraft, to achieve the weight of safe landing, it is necessary to carry out aerial refueling.

1 Since the maximum take-off weight of the aircraft is much greater than the maximum landing weight, if the aircraft requires landing immediately after take-off due to a malfunction, the landing weight 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. In order to reduce the weight of the aircraft and achieve the weight to land safely, it is necessary to release fuel in the air.

2 If the aircraft requires a forced landing due to unexpected circumstances, especially when the landing gear cannot be lowered, if there is a large amount of fuel left in the aircraft, it is likely to be ignited by friction, high temperature caused by collision, and sparks during landing, and even cause the aircraft to **. In this way, it is also necessary to carry out air oil release before the forced landing.

However, although the sky is large, the oil can not be released indiscriminately, and the oil cannot be released in the sky above the city, airport, forest and near the ground at low altitudes, and the oil release site is generally selected in the sky above the ocean, mountains and wastelands.

Many people are worried: what if the plane is released in the air, what if it falls on someone's head? Also, will the oil release cause environmental pollution?

Don't worry about that. 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.

The landing weight of the aircraft must be less than the take-off weight, this is the premise, than.

For example, a certain type of special aircraft, with an empty weight of 40 tons, is the most.

The large take-off weight is 70 tons, the maximum landing weight is 55 tons, assuming that the plane is loaded with 10 tons of people and goods, and 10 tons of fuel are added, which is 60 tons, if the plane flies together and encounters a situation that needs to land, then at this time the total weight of the aircraft is greater than the maximum landing weight of 55 tons, and if it cannot land, it must release at least five tons of oil. Without refueling, it is dangerous for the plane to land heavily, and some parts of the aircraft may not be able to bear excessive loads, and it may break the moment it lands, which may lead to the disintegration of the entire aircraft. The other is the forced landing, such as the landing gear of the aircraft can not be put down, the fuselage needs to land, there is no cushion of the landing gear, the fuselage is very fragile, and most of the belly and wings of the aircraft are fuel tanks, the aircraft and the ground are violently rubbed, no spark is absolutely impossible, if the fuel tank structure is damaged, a large amount of fuel leakage, if the fuel is not released, then the whole plane is impossible to escape.

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.

Why do planes drain oil in the air?

Hello, airplanes generally do not put fuel in the air. The plane is generally forced to land in an emergency, but it is impossible to land if the fuel tank is too large, and it is very easy to rush out of the runway and the consequences of fire are unimaginable. So you need to put oil before landing.

Aircraft in-flight refueling refers to the fact that the fuel is not consumed before the aircraft lands, and the weight of the fuselage exceeds the landing weight specified in the regulations and standards, and the aircraft can only be refueled in the air in order to land safely. When an aircraft releases fuel in the air, it is atomized to dilute the released fuel.

Further information: Aircraft are required to carry sufficient fuel for the intended flight at the time of takeoff, as well as a certain amount of spare fuel. When the plane arrived at its destination as planned, the fuel consumption was almost the same as expected before takeoff. At this time, the weight of the fuselage of the aircraft meets the take-off and landing standards.

However, if the aircraft needs to land shortly after takeoff, the fuel carried by the aircraft is not consumed, and the weight of the fuselage exceeds the landing weight specified in the regulations. In this case, the aircraft has to release fuel in the air in order to land safely.

Aerial refueling is of great significance in both military and non-military fields, in most cases if the aircraft requires immediate landing due to failure after takeoff, then the landing weight at this time will exceed the maximum landing weight of the aircraft, in order to reduce the weight of the aircraft, to achieve the weight of safe landing, it is necessary to carry out aerial refueling.

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 into 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 refueled during the landing process to make it safely descend the ridge.

3.Because the airport is far away from the city, and under the friction of the air, there is no need to worry about the celery 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.