faraz8188-netizen / methalox-cycle-toolkit Star 0 Code Issues Pull requests Open-source LOX–methane rocket engine cycle analysis framework: gas generator, oxidizer-rich staged, and full-flow staged combustion comparison with regenerative cooling, MCDA trade study, and Indian mission case. cantera rocket-engine aerospace-propulsion methalox lox-methane staged-combustion Updated Jul 7, 2026 Python