text: First flight2020 (planned)First stage – Super HeavyLength63 m (207 ft)Diameter9 m (30 ft)Gross massError in convert: Value "3.065.000" must be a number (help) Engines31 × RaptorThrust61.8 MN (13,900,000 lbf)Specific impulse330 s (3.2 km/s) each engineFuelSubcooled CH4 / LOXSecond stage – StarshipLength55 m (180 ft)Diameter9 m (30 ft)Empty mass85.000 kg (187.393 lb) Gross massError in convert: Value "1.335.000" must be a number (help) Propellant mass