Liquid hydrogen has a huge drawback of being impossible to store, so it isn’t much use for in-flight boosts. There are also huge engineering challenges associated with plumbing and pumping liquid hydrogen - it makes for very expensive rockets.
Liquid hydrogen has a huge drawback of being impossible to store, so it isn’t much use for in-flight boosts. There are also huge engineering challenges associated with plumbing and pumping liquid hydrogen - it makes for very expensive rockets.
