4 ms·

But not "non human-powered" flight? If Icarus flapped a little, that counts.

• Retric 7mo ago
  If you can’t maintain altitude without losing significant airspeed, you’re just falling.
  • behehebd 7mo ago
    Even if you maintain both you can still be falling (orbits!)
    • Retric 7mo ago
      Gravitational orbits lose energy over time. Not really relevant on human timescales but interesting trivia if nothing else.
      • behehebd 7mo ago
        Due to friction? Or is it other physics?
        • Retric 7mo ago
          Gravitational waves, though in the vast majority of case they are extremely weak. https://en.wikipedia.org/wiki/Gravitational_wave https://en.wikipedia.org/wiki/Gravitational_wave