Lex Fridman Podcast
#405 – Jeff Bezos: Amazon and Blue Origin
Jeff Bezos
It's not a great propellant, in my view, for booster stages because the stages then get physically so large. has very high ISP, but liquid hydrogen is not dense at all. So to store liquid hydrogen, if you need to store many thousands of pounds of liquid hydrogen, your liquid hydrogen tank gets very large. So you get more benefit from the higher ISP, the specific impulse.
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