# Difference between revisions of "AirFish"

From Noah.org

(→Lift of balloon) |
|||

Line 7: | Line 7: | ||

=== Lift of balloon === | === Lift of balloon === | ||

− | # The volume of a sphere is 4/3 * pi * | + | # The volume of a sphere is 4/3 * pi * r^3, where r is the radius of the balloon. |

# One cubic foot of helium will lift about 28.2 grams, so multiply the volume of the balloon by 28.2. | # One cubic foot of helium will lift about 28.2 grams, so multiply the volume of the balloon by 28.2. | ||

# Divide by 448 -- the number of grams in a pound -- to determine the number of pounds it can lift. | # 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 |

## Revision as of 06:41, 25 January 2008

### Basecamp

The project management is through AirFish Basecamp

### Lift of balloon

- The volume of a sphere is 4/3 * pi * r^3, where r is the radius of the balloon.
- One cubic foot of helium will lift about 28.2 grams, so multiply the volume of the balloon by 28.2.
- 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