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Drawn from what David MacKay said
aviation Flying and the machines that do it: propulsion, airlines, runways, and what happened to Boeing.
planes are already almost as energy-efficient as they could possibly be. Planes unavoidably have to use energy for two reasons: they have to throw air down in order to stay up, and they need energy to overcome air resistance. No redesign of a plane is going to radically improve its efficiency.
Where this was said
↗Sustainable Energy — without the hot airinference.org.uk
All 27 korrents from this piecethis one is 5th
Added to korrents 5 Sept 2026 · How quotes work · Something wrong? Tell us
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