• Korhaka@sopuli.xyz
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    2 days ago

    Same as sailing ships I suppose, if you are just using the wind like a hot air balloon anyway.

    • OwOarchist@pawb.social
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      2 days ago

      It would be very difficult to measure how much energy (in calories) a sailing ship is using in order to move.

      • grue@lemmy.worldM
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        2 days ago

        The notion of “fuel efficiency” kinda stops making sense for a sailboat.