What Bjorn Fehrm thinks about batteries

@bjorn-fehrm · 8 positions · On ppll ↗

Aeronautical engineer, former fighter pilot and airline executive, now an analyst at Leeham Company writing the weekly Bjorn's Corner on aircraft economics and design. He works from an aircraft performance model and has spent years checking the arithmetic of electric, hybrid and hydrogen aviation projects against it.

Bjorn Fehrm did not write this page.

We collected these quotes from things they published elsewhere, and every quote links to where it was said. They have no account here and have not endorsed this site. Quotes are word for word; the short line under each one is our own restatement, not their wording. Their own site. Is this you? Claim it or ask us to remove it. Or tell us what is wrong here.

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2 dated positions, 2021 to 2022, in their own words. Our reading of what Bjorn Fehrm has said — not written or endorsed by them.

2 positions so far — this page is not yet offered to search engines.

1. 8 Jul 2022

   Our readingThe multicopter air taxi is energy-intensive by construction, which holds its range to about twenty miles however good the batteries get.

   energy

   Their wordsThe drone-like architecture of the multicopters is simple, but as the rotors are responsible for keeping the unit at a constant altitude with hover power, they represent an energy-intensive version of VTOLs. Their range is, therefore, short, typically less than 20 miles.

   ↗Bjorn’s Corner: Sustainable Air Transport. Part 27. Multicopters.leehamnews.com 2nd of 2 in this piece

2. 15 months earlier

3. 2 Apr 2021

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

   optimism

   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.

   ↗Bjorn’s Corner: The challenges of hydrogen. Part 31. Wrap-up: Where we standleehamnews.com 1st of 3 in this piece