• perestroika@lemm.ee
    link
    fedilink
    arrow-up
    1
    ·
    3 days ago

    It wouldn’t help. The thing that gives you lift is the mass of displaced air. Difference from the (lack of) mass of the lifting gas is minimal.

    • tyler@programming.dev
      link
      fedilink
      arrow-up
      2
      ·
      3 days ago

      It would, but less than the density difference, since you’ve removed weight from the balloon thus gravity has less of a pull on the balloon. My wife (a PE in thermodynamics) was the one that verified that comment before I posted it, hence why I didn’t say it would increase lift by the difference in density.