Balloons on Mars

Jon Berndt schrieb:


Is this close to being accurate? I haven't done anything like this in a
while.

It it not far away, just take a look at the planned Mars balloon mission
(page 6):
http://www.marssociety.de/archimedes...ES%20ESTEC.pdf

Sven

Jon Berndt wrote:
[from s.s.shuttle discussion]

snip

Say the balloon is filled with helium. At the surface conditions of -60
degrees C, and 6 mb pressure, the density of He gas is 0.00184 kg/m^3 (??).
The mass of the enclosed Helium would then be 7.7 kg. So, the net buoyant
force on Mars would be (83.8 - 7.7) * 3.71 = 282 N (63 pounds). You'd have
to account for the weight of the balloon itself, of course.

Is this close to being accurate? I haven't done anything like this in a
while.



Any particular reason you chose Helium? Hydrogen is nonflamable
in the martian atmosphere.


Your numbers look pretty close, btw.