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SpaceX lastly reveals why its Starship Flight 8 Ship exploded, failure traced to ‘flash’ in rocket’s engines

May 24, 2025
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SpaceX lastly reveals why its Starship Flight 8 Ship exploded, failure traced to ‘flash’ in rocket’s engines
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As SpaceX gears up for the ninth check flight of its super-heavy Starship launch automobile, the corporate has launched findings from its investigation into the explosion of the rocket’s higher stage, known as “ship”, throughout its eighth check flight in March.

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Flight 8 launched March 6 from SpaceX’s Starbase manufacturing and check facility on the southern tip of Texas. The mission largely mirrored that of Flight 7, throughout which the each autos’ first stage Tremendous Heavy boosters efficiently rocketed again to Starbase to be caught by the launch tower’s “Mechazilla” chopstick-like arms. Ship, nonetheless, for each Flight 7 and Flight 8, didn’t fare in addition to its Tremendous Heavy counterpart. (Starship Flight 9 is scheduled to launch on Could 27.)

Flight 7 and Flight 8 every resulted in dramatic explosions over the Atlantic Ocean that might be seen from Florida, the Bahamas and Turks and Caicos, raining fiery Starship particles into the drink beneath. Flight 7’s Ship encountered a propellant leak and fireplace within the spacecraft’s “attic,” resulting in its explosion and loss. Aspect-by-side, Flight 8 adopted a really comparable trajectory, however as a substitute of a hearth within the attic, Starship’s final flight suffered a “flash” in what might be comparatively known as its “basement,” which caused its blazing demise.


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On this case, “basement” is Ship’s enterprise finish with six highly effective Raptor rocket engines. The flight plan for Starship’s eighth launch known as for Ship to deploy 4 dummy payloads simulating SpaceX Starlink satellites about 17.5 minutes after liftoff, adopted by a managed splashdown within the Indian Ocean off of Western Australia roughly 50 minutes later. However it by no means obtained the prospect to do both, and now we all know why.

A “flash” occurred close to one in every of Ship’s middle, sea-level Raptor engines, adopted by an “energetic occasion” that led to that engine’s shutdown, SpaceX mentioned in an update. The 2 remaining sea-level Raptors instantly terminated their thrust, in addition to one in every of Ship’s vacuum-optimized Raptor engines, inflicting the automobile to start tumbling uncontrolled.

A giant silver SpaceX rocket launches on Flight 8 from a Texas seaside launch pad

SpaceX’s Starship Fligh 9 launches into the sky above Starbase in South Texas. (Picture credit score: SpaceX)

About two minutes after the preliminary flash, SpaceX misplaced communication with the automobile, which triggered the spacecraft’s automated flight termination software program and subsequent self-destruct.

“Probably the most possible root trigger for the lack of Starship was recognized as a {hardware} failure in one of many higher stage’s middle Raptor engines that resulted in inadvertent propellant mixing and ignition,” SpaceX wrote.

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Tremendous Heavy, too, although efficiently returned to Starbase and the nice and cozy embrace of “Mechazilla,” did not achieve this with out incident. Solely 11 of the Flight 8 booster’s 13 engines used for its preliminary boostback burn have been profitable in reigniting. Its touchdown burn because it approached the launch tower noticed 12 of 13 engines relight, together with one of many beforehand unlit engines from the boostback burn.

SpaceX traced the trigger to “torch ignition points” on every of the malfunctioning engines, on account of “thermal circumstances native to the igniter,” the corporate mentioned. To mitigate these overheating points on Starship’s upcoming flight, SpaceX says they’ve bolstered the affected areas with extra insulation.

streaks of fire in the evening sky

The stays of SpaceXs Starship Flight 7 Ship automobile burns up after struggling a catastrophic failure. (Picture credit score: Dean Olson by way of Twitter)

Starship is designed to basically change and improve humanity’s means to succeed in house. Its eighth flight check was a reminder of the worth of placing {hardware} right into a real-world atmosphere as often as potential, whereas nonetheless maximizing controls for public security, to… pic.twitter.com/O9j9BM2IihMay 23, 2025

Fixes for Starship’s higher stage got here right down to tightening some bolts at a few of Ship’s extra important junctures and bettering the plumbing so flammable gases do not ignite once they aren’t alleged to:

“Starship’s higher stage will obtain extra preload on key joints, a brand new nitrogen purge system, and enhancements to the propellant drain system. Future upgrades to Starship will introduce the Raptor 3 engine which can embody extra reliability enhancements to deal with the failure mechanism.”

SpaceX says their investigation included greater than 100 long-duration check firings of the Raptor engine on the firm’s McGregor, Texas, check facility, and that its efforts have been overseen by the Federal Aviation Administration (FAA), along side NASA, the Nationwide Transportation and Security Board and the U.S. House Drive. Now, the FAA agrees Starship is able to fly once more.

In a press release launched Could 22, the FAA says they, “carried out a complete security evaluate of the SpaceX Starship Flight 8 mishap and decided that the corporate has satisfactorily addressed the causes of the mishap, and due to this fact, the Starship automobile can return to flight.”

The identical day SpaceX launched their Flight 8 investigation outcomes, the corporate additionally formally announced the date for Flight 9. Starship’s subsequent launch is scheduled for no sooner than Tuesday, Could 27, and would be the first launch of a flight-proven Tremendous Heavy booster. Flight 9 will liftoff on the identical first stage that supported Starship Flight 7, throughout a launch window that opens at 7:30 p.m. EDT (2330 GMT).

SpaceX will stream the mission reside on their web site, in addition to their account on X. House.com may even carry the published on our homepage, beginning about half-hour earlier than liftoff.





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