> Liquid oxygen turns anything in to fuel Not quite literally, in e.g. Soviet engine designs some gas generators are oxygen-rich, they produce oxidized exhaust

> Liquid oxygen turns anything in to fuel Not quite literally, in e.g. Soviet engine designs some gas generators are oxygen-rich, they produce oxidized exhaust of high temperature, and the engine still doesn't burn (usually). > So, the turbopump has to outperform the combustion chamber in terms of pressure and flow rate. Yes, the injector pressure drop can't be too small.