RocketSTEM Issue #14 - March 2017 | Page 58

ITS by the numbers Select slides from Musk’s presentation at the International Astronautical Conference Carbon-fiber primary structure Densified CH 4 /O 2 propellant Autogenous pressurization Length Diameter Dry Mass Propellant Mass Raptor Engines Sea Level Thrust 77.5 m 12 m 275 t 6,700 t 42 128 MN Vacuum Thrust 138 MN Booster accelerates ship to staging velocity, traveling 8,650 km/h (5,375 mph) at separation Booster returns to landing site, using 7% of total booster prop load for boostback burn and landing Grid fins guide rocket back through atmosphere to precision landing