Weather Balloon

I ordered a weather balloon last week and it came today, it arrived safely and is much smaller than I thought it would be, but then it’ll expand as it’s filled with gas.

Now I just need enough helium to fill it up, I’ll have to work out how much helium I need first, because I obviously wouldn’t want to over fill it and Helium is somewhat expensive.

I’ll have to work out what exactly I want to use as a payload next, also getting my hands on a big enough parachute wouldn’t be a bad idea either.

In case anyone’s interested it’s a 350g balloon made by Totex.