The problem of air leakage is a problem that every balloon has to face. We need to know and understand the air leakage situation of the blimp that we are going to use in the future.
The following two pictures are situation of balloon in day 1 vs. day 28:
I recorded some data in the past 28 days, see the following tables:
We can plot the buoyancy over time:
From the equation of linear regression, we know that the air leakage rate for this balloon is about 0.7g/day.