Question A: I've always wondered why emergency landing planes don't dump fuel these days. After all, in a crash, many people can survive thanks to modern means safety on board the aircraft, but die in the subsequent fire after the crash or suffocate from carbon monoxide.
Answer: Do you think that pilots are aware of the inevitability of the crash and do not try to avoid it until the last second. This is not true. It is worth remembering that not all aircraft are equipped with an emergency fuel dump system.
Even if a crash occurs, a much smaller percentage of passengers die from burns or smoke than most publications claim. According to NTSB statistics, passengers who are involved in a major plane crash are much more likely to survive.
Question: What happens when a pilot dumps fuel? Does it dissipate and then evaporate? And where is it usually prescribed to do this, over land or over water?
Answer: Yes, if necessary, the fuel is discharged through a specially designed nozzle, which disperses it into tiny drops. The dumping of fuel itself is allowed only in specially designated places. To minimize the impact on residential areas, we must also not harm people on the ground.
Question: In the past, almost all aircraft models were equipped with an emergency fuel dump system, but in modern models aircraft, this system is usually absent. Why did engineers abandon this safety system and does it have worthy alternatives in modern aircraft?
Answer: Modern aircraft, unlike their predecessors, are equipped with an overweight emergency landing system, which gives pilots the opportunity not to make an emergency dump of excess fuel. After such a landing, the aircraft undergoes a thorough check to eliminate the problems that have arisen and to make sure that the aircraft is fully operational and ready to fly.
In the section on the question Why does an airplane need to burn all the fuel before landing? given by the author Neurologist the best answer is When designing an aircraft (both civil and military, by the way) and in particular its landing gear, there is always such a parameter as the maximum landing weight. It is quite obvious that this is the maximum mass that the landing gear can withstand during landing. When the aircraft is being prepared for a mission, it is filled with enough fuel to fly to the planned landing site + navigational fuel supply. When everything is normal, the fuel is not drained. If the crew decided to land the car, and its mass exceeds the maximum landing weight, then they get rid of the fuel. Especially often such situations occur in the event of a serious failure immediately after takeoff. It should also be noted that not all aircraft simply “burn out” fuel in order to “lose weight”, some are equipped with an emergency fuel drain system.
Summarizing, we can say that the aircraft burns fuel so that the load on the landing gear does not exceed the maximum load, otherwise the landing gear simply will not withstand.
Regarding the "breaking off of the wings" I can say the following: so what, and the wing of the aircraft, if something happens, will fall off last! To be convinced of this, it is enough to look (and I happened to count) on the moment attachment points of the wing with the fuselage. So don't worry about the roof!
Answer from Bareheaded[guru]
Well, it's not always, only when there is some kind of breakdown. To prevent a fire and, as a result, an explosion.
Answer from wise[master]
not all of course. :) so that the plane can land. When an aircraft has a minimum amount of fuel during landing, it is easier for it to land ... All this is calculated in special programs ...
Answer from Fitted[guru]
During landing, there will be a confluence of electricity into the ground (since the plane is electrified in flight), and the fuel may explode.
Answer from Vitaly Mishanov[guru]
fuel has big weight after takeoff, the tanks are in the wings. when landing with full tanks, various accidents are possible, such as breaking off the wings and damage to the tanks. and it is difficult for a heavy aircraft to land - more mileage along the runway, etc.
Answer from Oleg Orlov[guru]
The aircraft produces fuel only during an EMERGENCY landing (has had a landing gear, another failure), so that in the event of an emergency, the fuel does not ignite. Remember Irkutsk (in my opinion), where the plane left for the take-off. He had fuel in his tanks that caught fire in the accident. And it was not worked out due to the fact that nothing foreshadowed an accident.
Answer from Bearing Blizzard "" [email protected]""
[newbie]
a plane with full tanks can take off!! but you won't be able to land! the wings are breaking!! when landing, the weight of the tanks + the force of gravity and free fall + acceleration are directed downwards, respectively, or the landing gear will not last or the wings will break off !!!
Answer from Lyokha[guru]
"Bearing the Blizzard", do not carry the blizzard. In a real emergency, the fuel is simply drained during the flight (I don’t know if this is possible on all planes. Probably not on all). IRKUTSK, etc., are out of business - for landing, braking, maneuvering, fuel is NEEDED. What remains for these needs is enough for a fire. Landing with a minimum fuel supply - additional measure safety, BUT there is still quite a lot of it in the tanks, otherwise why would “planes circle for hours over the airfield” if the runway is occupied, the landing gear is not released, the “glitch” of radar equipment, or just had to fly to another airfield due to weather conditions? I think Vitaly should get 10 points.
Here Sergey Rakitin quite rightly answered that the plane dumps fuel only in case of a forced landing, immediately after takeoff or somewhere in the middle of the way, but even then, if the situation allows, then kerosene is not dumped, but is produced as much as possible to a safe weight. An emergency reset is only done when the aircraft, for some reason, emergency reasons cannot fly in circles while running out of fuel.
Landing a plane with a lot of fuel on board is risky. The flight route and refueling of the aircraft is calculated taking into account that there is enough fuel to reach the alternate airfield and that after landing at such an airfield there is still approximately one to three tons of kerosene left (this is for large liners).
In case of emergency fuel dumping, not a black trace, but a white one will be visible behind the aircraft. The black trace is, as Sergei Rakitin writes, just soot and soot from ...
A strange question, but still 🙂 There was a dispute with a friend.
I argue that if there is "extra" fuel, then the plane burns it out, turning circles over the airfield, while a friend claims that the plane simply dumps fuel during the flight.
Or are we both wrong?
This is true. During the landing approach, the aircraft dumps the remaining fuel. It often happens that residents of neighboring villages suffer because of this, especially their households. _It smells like kerosene_
Residents of the airport settlements complain not only about the noise, but also about the smell of kerosene. A few years ago, for example, in the village of Vnukovo, from time to time, the smell of kerosene was so strong that the residents had to breathe into a rag. Now the planes fly on a different route, and the inhabitants of other villages breathe into a rag. And, for example, walking through the Sheremetyevsky forest, you can stumble upon places where the sharp smell of kerosene suddenly strikes your nose. Locals explain this phenomenon by dumping ...
Question Captain British Airways: When do planes dump fuel?
Q: I've always wondered why emergency landing planes don't jettison fuel these days. Indeed, in a crash, many people can survive thanks to modern safety equipment on board the aircraft, but die in the fire that follows the crash or suffocate from carbon monoxide.
Answer: You think that the pilots are aware of the inevitability of the crash and do not try to avoid it until the last second. This is not true. It is worth remembering that not all aircraft are equipped with an emergency fuel dump system.
Even if a crash occurs, a much smaller percentage of passengers die from burns or smoke than most publications claim. According to NTSB statistics, passengers who are involved in a major plane crash are much more likely to survive.
Q: What happens when a pilot dumps fuel? Does it dissipate and then evaporate? And where is it usually prescribed ...
