As with anything new, you have to learn about the things that you didn’t know, and especially the things that you didn’t know that you didn’t know.
As with anything new, you have to learn about the things that you didn’t know, and especially the things that you didn’t know that you didn’t know.
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According to some people on the SpaceX forums the potential explosiveness of NTO and titanium has been known since the 1960’s.