As over 80% of the fully laden take-off weight of a modern aircraft such as the Airbus A380 is craft and fuel, there remains considerable room for future improvements in fuel efficiency.
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Fuel economy is a measure of how much fuel an aircraft needs to operate, and it can be expressed in several ways, for example by the liters of fuel consumed per passenger per kilometer.
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Airbus states a fuel rate consumption of their A380 at less than 3 L/100 km per passenger (78 passenger-miles per US gallon).
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