A typical Boeing 747-400 passenger jet burns between 5,633 and 5,772 pounds of jet fuel on takeoff. For Boeing 747-400 freighters, the amount increases to between 6,389 and 6,589 pounds.
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Take-off and climb do burn the the most fuel for a given time or distance in aircraft. In terms of time, it is somewhat more fuel, typically about 30-40% more. My own aircraft will burn around 60 liters per hour on take-off from a sea level airport, as that is 100% of the power it can produce.
Airlines find that fuel dumping can actually be cheaper than not dumping in certain circumstances. But it's not something pilots do on a routine basis. We spoke with Alison Duquette, spokesperson for the Federal Aviation Administration (FAA), who assured us that it doesn't happen very often.
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.
The process to install an interior can take up to two years. Operating a BBJ 747-8 will cost an estimated $23,000 an hour – but if you can afford to buy a your own 747, this cost is inconsequential.
Boeing 747 fuel consumptionIf an Airbus A321neo burns 0.683 litre per second, Boeing 747 uses approximately 4 litres every second, which translates to 240 litres per minute and 14,400 litre per hour.
US Carriers Jet Fuel Cost and Consumption - March 2022US carriers reported an average fuel cost of $3.04 per gallon during March 2022. Spot prices have continued to increase, reaching $5.07 on April 28, 2022 and averaged $3.91 for the month of April.
The cost per gallon of fuel in September 2022 ($3.49) was up 2 cents (0.6%) from August 2022 ($3.47) and up $1.53 (78.1%) from September 2019. Total September 2022 fuel expenditure ($4.89B) was down 6.3% from August 2022 ($5.22B) and up 69.2% from pre-pandemic September 2019.
When an airplane experiences less drag, it consumes less fuel. This relationship between speed and fuel consumption means that flying at a slightly slower speed can result in significant fuel savings for airlines, which in turn can lower operating costs and potentially reduce ticket prices for passengers.
Can a 747 refuel mid air? The current pair of VC-25A-modified 747-200s known in popular culture as Air Force One have aerial refueling capabilities. This allows the jumbo jets to receive fuel inflight from an aerial tanker such as the Boeing KC-46.
In the event of an emergency requiring a return to the departure airport, the aircraft circles nearby in order to consume fuel to get down to within the maximum structural landing weight limit, or, if the situation demands, simply land overweight without delay.
The good news is that pilots are supposed to dump fuel at a safe height above the ground and away from other aircraft, and in addition, over as remote an area as possible. In the case of Heathrow, for example, most fuel dumps have occurred over the sea.