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Battery-electric airliners do not work even on optimistic assumptions, and the arithmetic said so before anyone built one.

Drawn from what Bjorn Fehrm said

What these subjects mean

optimism Expecting things to go well: whether it is what gets things built, or a bias that forecasts keep paying for.

batteries Storage as the thing that decides how much intermittent generation is worth building.

aviation Flying and the machines that do it: propulsion, airlines, runways, and what happened to Boeing.

First principles

What Bjorn Fehrm actually said

  1. Bjorn Fehrm Aeronautical engineer, former fighter pilot and airline…
    Having done the sums before hitting the keys, I was a skeptic. It just didn’t work, even with optimistic assumptions around the parameters for the aircraft and its batteries.

Added to korrents 7 Sept 2026 · How quotes work · Something wrong? Tell us

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