On the other hand, only some fraction of the energy inherent in jetfuel is conve... | Hacker News

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abdullahkhalids 74 days ago | parent | context | favorite | on: Why it's so hard to build a jet engine

On the other hand, only some fraction of the energy inherent in jetfuel is converted to work. So fuel based airplanes have to carry a lot of "extra" energy that is then just wasted as heat.

TylerE 74 days ago [–]

Jet engines are pretty good, over 50%, and electric is more lien 75 (not 100)

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