I've been learning about rocket propulsion and had an idea for an engine cycle, maybe its been done before but I haven't been able to find anything this online. So the full flow staged combustion cycle has many benefits over other cycles such as:
- smaller, lower power turbopumps needed
- no need for the fuel/oxidizer seal that can cause engine failure
My idea is to do a hybrid between staged combustion and FFSC. By this I mean having two preburners to get the benefits of FFSC, but running them both fuel rich for simplicity. So it would essentially be a fuel rich staged combustion cycle, but with two separate preburners/turbopumps to eliminate the shaft seal, lighter weight, etc. Good idea / bad idea?