[zwiteof]

I'm surprised he didn't mention the volumetric efficiency of compressed hydrogen compared to gasoline when comparing the specific energy density of the two fuels. Yes, you have more than 3x the energy per unit mass, but you have more than 5.5x less energy per unit volume. So instead of a simple 12 gallon gas tank, you need a 66+ gallon pressure vessel adding plenty of weight and taking up volume that would otherwise be useful for cargo or other purposes.

[addicted44]

It's the first part in a series of articles. I'm sure he will mention this, especially considering he hints at the densoty issues right at the beginning.