SpaceX Starship Prototype Finally Aces Pressure Test
The Starship SN4, a prototype of a SpaceX ship meant to one day take humans to the moon and Mars, has remained intact during pressure testing. ExtremeTech reports: Last year, SpaceX successfully tested the "Starhopper" prototype with one of the company's new Raptor engines. However, the full-scale prototypes haven't fared well in pressure testing. SN1 blew its top in February, and both SN2 and SN3 suffered similar fates during the "cryo" testing phase, which simulates a full-pressure tank in the vacuum of space. SN4 is the first version of the rocket to survive that test. The success of the SN4 prototype is a big step forward for the Starship program. The next step is to set up a static fire test with a single Raptor engine on the SN4. That could happen as soon as next week. Assuming it's still in one piece, SpaceX will then conduct a brief flight up to 500 feet (150 meters) before setting down. Elon Musk says that the next variant (predictably called SN5) will feature the full-scale tank and a trio of Raptor engines. The final design calls for six Raptor engines on the Starship and a further 37 of them on the Super Heavy stage.
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