The SpaceX design after late 2017 is for a much smaller launch vehicle, 9 meters in diameter rather than 12 meters for the ITS, and is now known as Starship. The Starship first stage (now known as Super Heavy) was slated to have 31 sea-level optimized Raptors in the initial design concept, with a total of 48 MN (11,000,000 lbf) of thrust.