Superheavy/Starship lifting off today
Early this morning SpaceX successfully launched its Superheavy/Starship heavy-lift rocket on its third orbital test flight.
The flight achieved almost all of its test goals, and far exceeded what was accomplished on the previous test launch in November.
First, Superheavy appeared to operate perfectly through launch, putting Starship into its correct near-orbit trajectory. The hot-fire stage separation, where Starship begins firing its engines before separation, worked as planned for the second straight time. Superheavy then refired some of its engines so as to target its correct landing zone in the Gulf of Mexico. As it approached the ocean surface, however, it started to tumble, and though some engines appeared to light for the landing burn, something went wrong and the stage was lost.
Next, Starship continued on its coast phase, during which engineers apparently tested opening and closing the payload doors as well as demonstrating a propellant transfer between two tanks. It also appeared that the engineering team was testing a variety of orientation modes for Starship. First it flew oriented stable to the Earth’s horizon. Then it appeared they placed the spacecraft in barbeque mode, where a spacecraft is placed in a steady roll in order to evenly distribute the heat on its surface.
For reasons not yet explained, the team cancelled the refire test in orbit of its Raptor engines. As the orbit chosen was low, the atmosphere still slowed the spacecraft down so that its de-orbit would still occur over the Indian Ocean.
As Starship started to descend it appeared its flaps were working successfully to control its orientation. It also appeared the heat shield tiles were working, as shown in the picture below. As Starship entered the thicker part of the atmosphere however, some tiles could be seen flying away from the ship and the spacecraft began to tumble. At an altitude of about 65 kilometers signal was lost.
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