SpaceX's Super Heavy V3 booster has successfully completed four days of cryogenic proof testing at Starbase, Texas, clearing a critical hurdle after the previous booster's failure in November. The 237-foot-tall stainless-steel rocket underwent multiple pressurization cycles with liquid nitrogen, simulating the conditions it will face during launch with methane and liquid oxygen.

This testing campaign tested the redesigned propellant systems and structural strength of the upgraded booster, which features significant improvements over previous versions. The new Raptor 3 engines produce more thrust and include integrated plumbing and sensors, eliminating the need for self-contained heat shields between engines. The design also incorporates only three grid fins instead of four for descent control, and integrates the hot-staging ring with the rocket for potential reuse.

Following the successful test, the booster returned to the factory where technicians will install 33 Raptor engines and grid fins before moving to the launch pad. The first Starship V3 vehicle is also expected to undergo similar testing. Assuming all systems check out, SpaceX could attempt the first Starship V3 test flight before the end of March, marking the 12th full-scale Starship/Super Heavy test flight and the debut of the company's most advanced rocket design to date.