LH2 will be unbeatable as aircraft fuel. Once LH2 airframes enter a market, the old stuff will be totally unable to compete. It remains to be seen whether exis

LH2 will be unbeatable as aircraft fuel. Once LH2 airframes enter a market, the old stuff will be totally unable to compete. It remains to be seen whether existing airframes can be retrofitted with under-wing LH2 tank nacelles, or if we will need whole new airframes.