@elonmusk Well, the rockets you currently have and the physics you are using are basically fkn useless
The solar conjunction is a major obstacle, and space itself is not fully defined by the standard model
Only three full-flow staged combustion engines have ever been built. The Soviet RD-270 ran 27 hot fires in the sixties and never flew. The American demonstrator reached full power in 2006 and was never turned into a complete engine. Raptor is the only one that has ever left the ground.