Re: Helium in a tank?
Steve G8KHW / AJ4XE
You can get a good estimate of the purity of a gas by calculating
the lift per unit volume. The typical "balloon helium" we get here
in the UK is about 95-97% pure (the remaining 3 - 5% assumed to be
air). The lift per unit volume of balloon helium here is quite
close to 1.0Kg/cu m (a rather lucky alignment). If I have done my
math right that's also almost exactly 1.0oz per cu ft.
If you know the weight of the balloon, the measured neck lift,
and how much gas should have been in the tank you can calculate
the lift per unit volume.
On 20/07/2020 01:56, Larry wrote: