3 ms·

Liquid hydrogen has about 4X the specific energy of Jet-A. But yes, the system as a whole isn't great once you consider what it takes to keep the H2 liquid...

• sokoloff 7y ago
  Energy density per unit of mass is about 3x in favor of hydrogen. Energy density per unit of volume is about 4x in favor of Jet-A.
  • __sy__ 7y ago
    Sorry you are absolutely correct. Volume matters a lot, maybe almost as much as weight, for aircraft design.