> That came later after the MCT and then ITS acronyms I believe there was a BFR originally [1], and it just returned later. But the real old one was the Falcon

> That came later after the MCT and then ITS acronyms I believe there was a BFR originally [1], and it just returned later. But the real old one was the Falcon X and Falcon XX [2], which were to use the "Merlin 2" engine (giant RP/LOX engine a la the saturn V). [1] https://en.wikipedia.org/wiki/SpaceX_Mars_program#Early_heavy-lift_concepts https://en.wikipedia.org/wiki/SpaceX_Mars_program#Early_heav... [2] https://en.wikipedia.org/w/index.php?title=Falcon_X&oldid=384325449 https://en.wikipedia.org/w/index.php?title=Falcon_X&oldid=38...