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Every aircraft propulsion system is an air pump, and accelerating a large mass of air a little is always more efficient than accelerating a little air a lot.

Drawn from what Bjorn Fehrm said

Subjectaviation
What this subject means

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

What Bjorn Fehrm actually said

  1. Bjorn Fehrm Aeronautical engineer, former fighter pilot and airline…
    All propulsion systems are air pumps, and they work more efficiently if they accelerate a large mass of air to a small overspeed than vice versa.

    Where this was said

    ↗Bjorn’s Corner: Sustainable Air Transport. Part 27. Multicopters.leehamnews.com

    8 Jul 2022

    All 2 korrents from this piecethis one is 1st

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

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