I completely forgot to weight individual parts before putting everything together, so this table gives only approximate values:
|APRS tracker with GPS||3oz|
|Canon A1100is camera||5oz|
|10xAA L91 batteries with battery holder||9oz|
|Beacon with battery||1oz|
|Hand warmers||3 oz|
|Glue, velcro, misc||4oz|
Plug this weight into HABHUB Burst Calculator, and it generated the following altitude prediction:
Translation: HAB-1 needed 105 cubit feet of helium, which generated 2.5kg (5.5lb) neck lift; balloon was expected to ascend for 78 minutes at 5m/s (15ft/s) rate and burst at 26km (85,000ft) altitude.
We bought a size “S” tank with 120 cubic feet of Helium. Rent of the cylinder was $50 and Helium itself cost $90.