SpaceX
SpaceX’s first Starship engine suffers “expected” damage during Raptor test fire
SpaceX CEO Elon Musk says that the first full-scale Starship engine to be tested has already been pushed to the point of damage less than three weeks after the campaign began, setting the stage for the second full-scale Raptor to take over in the near future.
According to Musk, while most of the damaged pathfinder Raptor’s components should still be easily reusable, the assembly of the second finalized engine is “almost done” and that Raptor will take over near-term testing rather than waiting for repairs to the first engine. This is undoubtedly an extraordinarily aggressive test program, particularly for such a new and cutting-edge rocket propulsion system, but these latest developments are ultimately far more encouraging than they are concerning.
Merlins. The max chamber pressure run damaged Raptor SN 1 (as expected). A lot of the parts are fine for reuse, but next tests will be with SN 2, which is almost done.
— Elon Musk (@elonmusk) February 21, 2019
Although the Raptor engine family began integrated subscale static fires way back in September 2016, SpaceX’s propulsion team finalized Raptor’s baseline design and completed assembly, shipment, and an integrated static fire of the first full-scale engine on February 3rd, considerably less than three weeks before Musk took to Twitter. Aside from confirming that the new Raptor had been damaged during its most recent static fire several days prior, Musk indicated that the failure (unsurprisingly) was primarily attributed to the engine reaching the highest chamber pressures yet.
Raptor’s main combustion chamber (the bit directly above the nozzle) has been designed to nominally operate at and reliably withstand extraordinary pressures of 250+ bar (3600+ psi), performance that demands even higher pressures in the components that feed hot methane and oxygen gas into Raptor’s combustion chamber. One prime example hinted at by Musk in a 2018 tweet is its oxygen preburner, used to convert liquid propellant into a high-velocity gas that can then feed a dedicated oxygen turbopump. Aside from the absurdly corrosive environment created by extremely hot gaseous oxygen, the preburner must also survive pressures that could peak as high as 800+ bar, or 12,000 psi.
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- SpaceX’s world-class rocket propulsion team has been progressing through early full-scale Raptor tests at an incredible speed. (SpaceX)
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- Full-scale Raptor’s first static fire test, February 3rd. (SpaceX)
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- Raptor’s business end with a Musk-for-scale. (Elon Musk)
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- Starship revealed a trio of Raptor mockups when SpaceX technicians moved the assembly from stand to ground. (NSF – bocachicagal)
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- A September 2018 render of Starship (then BFS) shows one of the vehicle’s two hinged wings/fins/legs. (SpaceX)
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- BFR (2018) breaks through a cloud layer shortly after launch. (SpaceX)
A lack of technical detail means that it’s hard to know what thrust or main chamber pressure Musk had in mind when referring to exotic alloys that would be needed to survive those pressures, but the performance statistics of a Raptor with a preburner operating at 800+ bar would probably outstrip anything Musk has thus far described. In other words, it’s safe to assume that Raptor has probably not been pushed to those performance levels just yet, although it’s still a distant possibility. More likely is that 800+ bar in the oxygen preburner is an extreme stretch-goal that will take concerted research, development, and optimization to achieve, with Raptor having suffered damage somewhere below those levels while still reaching eye-watering performance figures.
— Elon Musk (@elonmusk) February 4, 2019
For an engine as complex as Raptor, there are countless dozens of potential failure modes the appearance of which would come as little surprise for an engine just days into full-scale testing. Above all else, the Raptor test schedule held by SpaceX’s world-class propulsion team – be it self-motivated or driven by reckless management-by-spreadsheet – has been fast-paced in the extreme, taking the first high-performance Raptor ever built from standstill to more than 90% thrust and chamber pressures of almost 270 bar (3900 psi) in – quite literally – less than one week. In the same period of time, more than half a dozen static fire tests (ranging from 1-10 seconds) were performed.
Within a few days of that February 10th milestone, in which Raptor reached chamber pressures comparable with the most advanced modern engines (namely RD-180/190/191), the engine was apparently pushed dramatically higher still, reaching a chamber pressure (and thus thrust) that wrought damage on some of the more sensitive parts of the engine’s plumbing. Despite the fact that the second production Raptor is apparently already “almost done”, Musk suggested that it would already feature changes (of unknown gravity) to mitigate the failure modes experienced by Raptor SN01.
SN2 has changes that should help
— Elon Musk (@elonmusk) February 21, 2019
In an industry where NASA and contractors like Aerojet-Rocketdyne will spend months between static fire tests of Space Shuttle engines that have each literally flown multiple (if not) dozens of missions to orbit and have a demonstrated performance and reliability record that is measured in the hundreds of thousands of seconds, the speed and agility of SpaceX’s Raptor development and test program is breathtaking. What remains to be seen is just how comparably reliable and successful the end results (i.e. operational Raptor) will be, but an attitude that actively accepts and even pursues testing to destruction can ultimately only serve to benefit the finished product at the cost of destroyed hardware and many on-ground lessons learned the hard ways.
Given the immense success of SpaceX’s Merlin family of engines and the aggressive strategy of development and continuous improvement that brought it from Merlin 1A to 1D and MVacD, SpaceX is clearly not fumbling around in the dark when it comes to Raptor R&D.
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Elon Musk
Elon Musk called it Epic: The full story of SpaceX’s Starship Flight 12
Starship V3 reached space, survived reentry, and proved it can fly with engines out.
After two scrubbed attempts, SpaceX launched Starship V3 on Friday, May 22 from the brand new Pad 2 at Starbase, Texas, completing the most technically complex test flight the program has attempted and moving the bar in ways that matter for everything from commercial satellites to the first human Moon landing since 1972.
The Super Heavy booster lost an engine early during ascent and several more failed during its boostback burn, sending the stage into an off-nominal descent that ended in a hard landing in the Gulf of Mexico. SpaceX had planned a soft splashdown rather than a tower catch on this first V3 flight, so losing the booster was expected to be acceptable within the test parameters.
Ship 39 told a different story. The Starship upper stage reached its planned sub-orbital trajectory despite losing one of its vacuum Raptor engines, with the remaining engines compensating for the loss and keeping the vehicle on course. The spacecraft then survived atmospheric reentry, completed its belly-flip maneuver, and made a controlled upright splashdown in the Indian Ocean west of Australia.
Watch Starship’s twelfth flight test https://t.co/caRB1thMlg
— SpaceX (@SpaceX) May 22, 2026
The payload test is where Flight 12 separated itself from every previous Starship mission. SpaceX deployed 22 objects including 20 Starlink simulator satellites sized like next-generation V3 Starlink units, plus two specially modified satellites equipped with cameras that scanned Starship’s heat shield from orbit and transmitted imagery back to operators.
The broader significance of what was tested on Friday goes well beyond one mission. Every future Starship deployment, whether it is a batch of operational Starlink V3 satellites, cargo bound for the Moon, or eventually crew headed to Mars, depends on SpaceX being able to inspect and certify the heat shield quickly between flights. The camera-equipped satellites deployed on Flight 12 are the first step toward making that inspection process automated and data-driven rather than manual and time-consuming. If SpaceX can scan the heat shield from orbit after every reentry and flag damaged or missing tiles before the vehicle even lands, it fundamentally changes the turnaround time between flights. For a program that needs to refuel Starship in orbit using ten or more tanker launches before a single Moon mission can depart, launch cadence is everything. Friday’s payload test can be seen as building the maintenance infrastructure for rapid reusability.
Elon Musk took to X, following the successful tests, and noting: “Congratulations @SpaceX team on an epic first Starship V3 launch and landing!” “You scored a goal for humanity.”
The stakes behind that goal are concrete. NASA has selected Starship as the Human Landing System for Artemis IV, targeting a crewed Moon landing in 2028, and SpaceX has yet to demonstrate a full orbital flight, in-orbit refueling, or docking with an Orion capsule. Flight 12 proved V3 can fly, survive reentry, and deploy payloads under engine-out conditions. That is the foundation everything else has to be built on, and with a SpaceX IPO targeting June 2026, the timing of that proof of concept could not have been more useful.
SpaceX has decided to stand down from what was supposed to be the first test launch of Starship’s v3 rocket tonight after a minor issue with a hydraulic pin delayed the flight once more.
The company scrubbed its first test flight of the upgraded Starship v3 on May 21 in the final minutes of the countdown. SpaceX CEO Elon Musk quickly took to social media platform X, explaining that a hydraulic pin on the launch tower’s “chopsticks” arm failed to retract properly.
Musk added that the company would fix the issue this evening. SpaceX will attempt another launch tomorrow night at 5:30 p.m. CT, 6:30 p.m. ET, and 3:30 p.m. PT.
The hydraulic pin holding the tower arm in place did not retract.
If that can be fixed tonight, there will be another launch attempt tomorrow at 5:30 CT. https://t.co/DJAdvDYQpH
— Elon Musk (@elonmusk) May 21, 2026
The countdown for Starship Flight 12 — featuring the taller and more capable V3 stack with Booster 19 and Ship 39 — had been progressing smoothly until the late-stage issue surfaced. The Mechazilla tower arm, designed to secure the vehicle on the pad and eventually catch returning boosters, could not complete its retraction sequence.
SpaceX teams immediately began troubleshooting the hydraulic system for an overnight repair.
Starship V3 introduces several significant upgrades over earlier versions. These include greater propellant capacity, more powerful Raptor 3 engines, larger grid fins, enhanced heat shielding, and an improved fuel transfer system.
We covered the changes that were announced just days ago by SpaceX:
SpaceX unveils sweeping Starship V3 upgrades ahead of May 19 launch
The changes are intended to increase payload performance, support higher flight rates, and advance the vehicle toward operational missions, including Starlink deployments, NASA Artemis lunar landings, and future crewed Mars flights. The debut flight from Starbase’s new Launch Pad 2 marked an important milestone in scaling up the fully reusable Starship system.
This stand-down highlights the intricate challenges of preparing the world’s most powerful rocket for flight. Despite extensive pre-launch checks, a single component in the ground support equipment can force a scrub.
The incident aligns with Starship’s proven iterative development approach. Previous test flights have encountered both successes and setbacks, each providing critical data that refines hardware and procedures. Some outlets may call some of these flights “failures,” when in reality, they are all opportunities for SpaceX to learn for the next attempt.
With V3, SpaceX aims to reduce ground-system dependencies and increase launch cadence to meet ambitious long-term goals.
Elon Musk
SpaceX just filed for the IPO everyone was waiting for
SpaceX filed its public S-1, revealing $18.7 billion in revenue and billions in losses.
SpaceX publicly filed its S-1 registration statement with the Securities and Exchange Commission on May 20, 2026, making its financial details available to the public for the first time ahead of what could be the largest IPO in history.
An S-1 is the formal document a company must submit to the SEC before going public. It includes audited financials, risk factors, business descriptions, and how the company plans to use the money it raises. Companies are required to file one before selling shares to the public, and it must be published at least 15 days before the investor roadshow begins. SpaceX had already submitted a confidential draft to the SEC in April, which allowed regulators to review the filing privately before it went public.
The S-1 reveals that SpaceX generated $18.7 billion in consolidated revenue in 2025, driven largely by its Starlink satellite internet division, which posted $11.4 billion in revenue, growing nearly 50% year over year. Despite that growth, the company lost about $4.9 billion in 2025 and has burned through more than $37 billion since its founding.
SpaceX just forced Verizon, AT&T and T-Mobile to team up for the first time in history
A significant portion of those losses trace back to xAI, Elon Musk’s artificial intelligence company, which was recently merged into SpaceX. SpaceX directed roughly 60% of its capital spending in 2025 to its AI division, totaling around $20 billion, yet that division lost billions and grew revenue by only about 22%.
SpaceX plans to list its Class A common stock on Nasdaq under the ticker SPCX, with Goldman Sachs, Morgan Stanley, and Bank of America leading the offering. The dual-class share structure means going public will not meaningfully reduce Musk’s control, as Class B shares he holds carry 10 votes per share compared to one vote for public Class A shares.
The company is targeting a raise of around $75 billion at a valuation of roughly $1.75 trillion, which would make it the largest IPO ever. The investor roadshow is reportedly planned for June 5.
Elon Musk called it Epic: The full story of SpaceX’s Starship Flight 12
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