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The oxygen is there for hydrogen/oxygen engines (and that's most of the weight.) However, Elon's decision to go with methane undercuts this a lot since the rati
by Nomentatus 9y ago
The oxygen is there for hydrogen/oxygen engines (and that's most of the weight.) However, Elon's decision to go with methane undercuts this a lot since the ratios you need carbon (a relatively heavy molecule that's scarce on the moon) as well.
- greglindahl 9y agoMethane is a choice driven by the ease of ISRU making methane on Mars. It's much easier to use a thin atmosphere of CO2 than to dig up ice.
- Nomentatus 9y agoOr perhaps better, locate at a place on Mars where you have permanent water ice and seasonal CO2 ice.