Just A. Tinker
@John_Gardi · Jun 10, 2020
Folks don't realize the mass penalty using hydrogen as rocket fuel.
The Space Shuttle's External Tank carried about four time the volume of liquid hydrogen than its liquid oxygen. Hydrogen is light but takes room that equates to larger tanks. Liquid methane takes much less room.
Elon Musk
@elonmusk
Also, insulation of a deep cryogen( which I’d call anything that liquifies nitrogen aka 78% of air) is heavy & prone to heat leaks. H2 is hell.
07:12 PM · June 10, 2020 · 0 views
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