AirFish

Basecamp

The project management is through AirFish Basecamp

Lift of balloon

1. The volume of a sphere is 4/3 * pi * r^3, where r is the radius of the balloon.
2. One cubic foot of helium will lift about 28.2 grams, so multiply the volume of the balloon by 28.2.
3. Divide by 448 -- the number of grams in a pound -- to determine the number of pounds it can lift.

 (4/3) * pi * (r^3) * 28.2 = lift in grams
 ((4/3) * pi * (r^3) * 28.2) / 448 = lift in pounds