4 ms·

Article title says plane but in the text it says powered flight.

• emmelaich 7mo ago
  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