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Not even. LOX is explosive when it contacts organic matter like wiring harnesses, plus Dewars are very fragile, and breaking the vacuum would result in a lot of
by wbl 10y ago
Not even. LOX is explosive when it contacts organic matter like wiring harnesses, plus Dewars are very fragile, and breaking the vacuum would result in a lot of boil off.
- R_haterade 10y agoI did not know this. So it's even easier than I thought to sabotage a rocket launch. Thanks for replying--I would have gone to my grave not even considering the fact that rocket fuel has oxidizers mixed in, but the search you just sent me on set me straight.
- jakub_h 10y agoIt's not mixed-in, it's in a separate tank. But since the tank is an aluminum alloy (often with copper or lithium mixed in) these days, I wonder about its behavior in the presence of an ignition source (some magnesium in the bullet or perhaps even just friction?).
- jakub_h 10y agoThere's no Dewar vessel on the LV as far as I'm aware of. The surface of the stage is the propellant tank, made of simple Al-Li alloy, several millimeters thick. It works fine because of the large mass of the LOX and the comparatively short time of the stage's operation. You just can't transfer enough heat into the stage naturally in the short twenty or thirty minutes between fueling and launch to cause any trouble. Before they started supercooling the LOX, it was even easier because heat transfer into LOX tanks is conventionally managed by boil-off (in launchers without supercooled propellants, latent heat keeps the liquid at a stable temperature and a trickle refills the tank continuously until a minute or two before launch).