2 ms·

Emitting only water vapor is well within foreseeable development. LH2 fuel would provide better range, besides. In certain circumstances, ammonia as fuel would

• nine_k 4y ago
  Replacing compact, lightweight, low-maintenance kerosene tanks with larger cryogenic containers and fighting hydrogen's propensity to penetrate metals and rubbers and make them brittle is not an easy sell. It may make sense in some cases (like large cargo planes), but in a lot of others, like small, high-g semi-autonomous combat aircraft of the future, it may not be practical. Or maybe metallic hydrogen at standard conditions will be attained soon enough.
  • ncmncm 4y ago
    People will do whatever makes better sense according to experience and instant circumstances. There is no need to speculate. But LH2 aircraft, wherever actually deployed, will be impossible to compete with.