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How is Cryogenic fuel kept... Cryogenic in rockets [duplicate]

How is cryogenic fuel & oxidizer kept at cryogenic temperatures in rockets? I am mostly interested in the first stage of launch vehicles rather than something like a Centaur that keeps hydrolox ...
YuccaWorks's user avatar
12 votes
2 answers
2k views

Why was the Shuttle's LOX tank on top of the LH2 tank, since that makes it more top-heavy?

The external tank for the shuttle contained tanks of liquid Oxygen and Hydrogen for the main engines to use. These two have similar (though not equal) volumes, but the Oxygen is heavier in an obvious ...
AlanSE's user avatar
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