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Starship SN2 was originally planned to be a full-scale Starship tank section which would conduct a hop to 150 meters. Following the loss of Starship SN1, plans for SN2 changed to be only a smaller scale test tank. This allowed SpaceX to quickly verify that the design changes to the thrust section worked as intended. SN2 successfully passed a cryogenic proof test with simulated engine thrust loads.
The Starship SN2 test tank successfully completed a cryogenic proof test designed to verify that the tank's thrust puck could withstand the forces from a Raptor engine and cryogenic propellants.