Why do planes dump fuel while flying?

Fuel dumping (or a fuel jettison) is a procedure used by aircraft in certain emergency situations before a return to the airport shortly after takeoff, or before landing short of the intended destination (emergency landing) to reduce the aircraft's weight.



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In most cases, airlines only dump air in midair immediately before landing. They don't do it before or during takeoff, nor do they do it halfway through their flight. Rather, airlines may dump some of their airplane's excess fuel immediately before landing so that it lowers the weight of their aircraft.

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Over a certain altitude it is always considered safe to dump fuel. The high speed of the airplane means the fuel is spread very thin and will evaporate before it hits the ground. Accidents do of course happen where it is not possible to safely dump fuel and they end up dumping over populated areas.

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How long can a plane fly with full fuel? A: This depends on the size of the plane, its efficiency, and how fast it's flying. A modern Boeing 747 can fly about 15,000 km (9,500 miles) when it's flying at 900 kmh (550 mph). This means it can fly non stop for almost 16 hours!

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For pilots, fatigue can be a serious flight hazard, resulting in loss of situational awareness, poor decision making, and even falling asleep at the controls. Part of the reason fatigue is so dangerous is that a pilot might not even realize he's fatigued until major errors have been made.

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Specifically, pilots need to inspect the fuel to make sure it's the right type and that it is free from contaminants which is where fuel testers come into play. Some pilots call them fuel sumpers (or samplers) or fuel checkers, but most flight schools call them fuel testers.

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Water salutes have been used to mark the retirement of a senior pilot or air traffic controller, the first or last flight of an airline to an airport, the first or last flight of a specific type of aircraft, as a token of respect for the remains of soldiers killed in action, or other notable events.

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Yes, so long as the fuel in excess does not put the weight above the maximum allowed landing weight. If the air plane's weight is above the maximum allowed landing weight, the pilots have to either burn fuel by circling continuously or dump some fuel.

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The reason to dump fuel is simple: to drop weight. Any given aircraft has a Maximum Landing Weight (MLW) at which it can land, and in most cases that weight is lower than its Maximum Takeoff Weight (MTOW).

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What is the longest flight in the world by distance? The longest flight in the world by distance is New York (JFK) to Singapore (SIN) on Singapore Airlines clocking in at 9,537 miles. What plane can fly the farthest in the world?

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Qantas 747-400 City of Canberra (VH-OJA) flew from London to Sydney non-stop during its 1989 promotional flight, flying 17,000 kilometers in about 20 hours.

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In-flight refueling can of course extend a flight's duration in the air. For instance, the Presidential US Air Force One with inflight-refueling facilities can stretch its time in the air for days. Some say, it can stay in the air for about 3 days.

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Typically in the case of an emergency landing, the plane will be landing somewhere well short of its destination. If it has not been flying long enough to burn off enough fuel to get below the maximum landing weight, they need to dump fuel in order to land safely.

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A pilot will choose to dump fuel only on very rare occasions. Brickhouse: Unless you have a medical emergency on board, someone is dying, you don't really have time to fly around and burn fuel. So, in that case that's when you would dump fuel so that you can lose weight quickly.

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Among other things, this means descending to a lower altitude and, potentially, reducing the airplane's speed. If all of an airplane's engines fail simultaneously, the pilot will perform an emergency landing.

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