![]() ![]() A 88 gCO₂/km represents 28 g of fuel per km, or a 3.5 L/100 km (67 mpg ‑US) fuel consumption. In 2018, CO₂ emissions totalled 747 million tonnes for passenger transport, for 8.5 trillion revenue passenger kilometres (RPK), giving an average of 88 gram CO₂ per RPK. An airline efficiency depends on its fleet fuel burn, seating density, air cargo and passenger load factor, while operational procedures like maintenance and routing can save fuel.Īverage fuel burn of new aircraft fell 45% from 1968 to 2014, a compounded annual reduction 1.3% with a variable reduction rate. ![]() The fuel economy in aircraft is the measure of the transport energy efficiency of aircraft.Įfficiency is increased with better aerodynamics and by reducing weight, and with improved engine BSFC and propulsive efficiency or TSFC.Įndurance and range can be maximized with the optimum airspeed, and economy is better at optimum altitudes, usually higher. Between 19, efficiency per passenger grew from 0.4 to 8.2 RPK per kg of CO₂. ![]()
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