@nik6019@manu_j_nair They explained it in previous video , going the dual cryogenic propellent route will add a lot more complexity and cost of supply chain. Additionally there aren't many refinaries that can make rocket grade methane. And setting up once is way out of budget.
@Warfront_2630@KARMA_0036@cpt2025@lovish_pandey06@CataPaul2@Roy_rishi01 Lmao this is such a stupid comparison, CE20 uses decades old GG cycle, and has shittier ISP than its counter parts. And the only reason you need such powerful upper stage is that your lower stage lacks the power needed for orbit insertion
@thinks1932@theguildworld Only problem is they need to invest a billion dollars to setup a methane refinement factory just to produce fuel , no VC is going to fund that
@cosmicjake37@RishAbH9536@theguildworld EtherealX cycle is FSCC , full flow segregated cooling cycle. Since they are transferring enthalpy between both propellents so maybe using dual cooling helps manage heat. If you see the video they are more focused on the vehicle rather than engine.