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Comment Re:oh jeez. (Score 1) 140

... Helium .. has roughly half of the lifting capacity of Hydrogen....

not really, the "lifting capacity" is from the difference in mass between lifting gas and surrounding air. Air is ~29 g/mol, so the ratio of lifting capacity of H2:He is

[(29 - 2) / 29] : [(29 - 4) / 29] = 27/25,

works out at 8% difference. The containment vessel's weight is typically more significant than the gas itself in a lighter-than-air craft.

Balloons with He3 give only 3% more lift than He4, lunacy!

To downgrade the human mind is bad theology. - C. K. Chesterton