Published 05 November, 2020; last updated 10 December, 2020
The Boeing 747-400:
The Boeing 747-400 is a 1987 passenger plane.1
The plane uses 10.77 kg/km of fuel on a medium haul flight.2 We do not know what type of fuel it uses, but typical values for aviation fuel are around 44MJ/kg.3 Thus to fly a kilometer, the plane needs 10.77 kg of fuel, which is 10.77 x 44 MJ = 474 MJ of fuel. This gives us 0.0021m/kJ.
According to Wikipedia, the 747’s ‘operating empty weight’ is 183,523 kg and its ‘maximum take-off weight’ is 396,893 kg.4 We use the range 183,523 kg—396,893 kg since we do not know at what weight in that range the relevant speeds were measured.
This gives us a range of 0.39 – 0.83 kg.m/J
Primary author: Ronny Fernandez
“Boeing 747-400.” In Wikipedia, November 2, 2020. https://en.wikipedia.org/w/index.php?title=Boeing_747-400&oldid=986725646.
“Aviation Fuel.” In Wikipedia, September 13, 2020. https://en.wikipedia.org/w/index.php?title=Aviation_fuel&oldid=978262126.