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Bjorn’s Corner: The challenges of hydrogen. Part 31. Wrap-up: Where we stand

Bjorn Fehrm · 2 Apr 2021 · leehamnews.com ↗

3 korrents from this piece

Bjorn Fehrm did not write this page.

Every claim below was made in this piece, quoted word for word and numbered in the order the piece makes them, so you can read it there rather than take our word for it. The sentence above each quote is our reading of the claim, not their wording. Each quote was checked against a stored copy of the page at build time; where the two differ, the quote is the fact.

  1. Our reading

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

    Their wordsHaving 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.
    Interesting

  2. Our reading

    A hybrid-electric airliner ends up heavier and more complex than the aircraft it replaces and delivers no fuel saving at all.

    Their wordsNow you have a carbon fuel burning aircraft that is more complex and heavier than the plane that it replaces, and if you do your sums carefully, you find that there are no fuel efficiency gains and, therefore, no environmental gains.
    Interesting

  3. Our reading

    Sustainable aviation fuel cannot be scaled to the size of the fleet, because its feedstock competes with growing food.

    Their wordsThere won’t be enough of it for the 25,000 planes flying each day, the feedstock will compete with food production.
    Interesting