This is probably best illustrated by a picture: https://www.researchgate.net/figure/Relative-fuel-consumption-in-kg-km-for-an-example-longrange-aircraft-dependi

This is probably best illustrated by a picture: https://www.researchgate.net/figure/Relative-fuel-consumption-in-kg-km-for-an-example-longrange-aircraft-depending-on-the_fig1_228810749 https://www.researchgate.net/figure/Relative-fuel-consumptio...