Eh? All "operational projects" that have used peroxide have used <=90% concentration.Seriously, ERPS is interested in developing technology, and if we just want to test engines, silver is fine. Catalysts that work with >90% peroxide are necessary for operational projects that soon will need to be able to deal with low temperature launches.
Someone correct me if I am wrong, but >90% concentration has been limited to experimental use so far.
John Carmack
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