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Ascension rate of balloon

  1. Jun 12, 2010 #1
    How do I find the accelerating ascension rate of my helium balloon?
    Ignore factors such as the increase of volume as it ascends, temperature, wind etc.
    I just want the basic ascension rate of ideal non changing conditions.

    rho_f Outside air density - I think typical air density is this - 1.2 kg/m^3

    v Volume - 179.59438 m^3

    m Mass - 90.7184 kg

    g Earth's gravity - 9.80665 m/s^2

    Through some research I have been given this formula but am not sure if its the correct one or how to compute it.

    a = g*(rho_f * V - m)/(rho_f*V + m)

    And also this link

    Last edited: Jun 12, 2010
  2. jcsd
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