[Spaceships] Martian “Gas” Station

[Agemegos]

Originally Posted by DaltonS

Yes, by volume this may be true (see my quote from GURPS Mars above) but I expect hydrogen would be sold by mass, not volume. It's up to the user to have a gasbag big enough to provide the necessary lift.

Dalton “who decided not to make a political comment” Spence

The mass and cost of the gasbag envelope go with volume. Where the air is very thin you would need a vast, massive, costly envelope, perhaps impractical or uneconomic.