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SpaceX CEO Elon Musk says major Starship engine bug is fixed as Raptor testing continues
SpaceX CEO Elon Musk has revealed the latest official photo of the company’s Raptor engine in action and indicated that a major technical issue with vibration appears to have been solved, hopefully paving the way for Starhopper’s first untethered flights.
Partly due to Musk’s own involvement in the program, SpaceX’s propulsion development team have struggled to get any single Raptor engine to survive more than 50-100 seconds of cumulative test fires. According to information from sources familiar with the program, Musk has enforced an exceptionally hardware-rich development program for the first full-scale Raptor engines to such an extent that several have been destroyed so completely that they could barely be used to inform design optimization work. Although likely more strenuous and inefficient than it needed to be, the exceptionally hardware-rich test program appears to have begun to show fruit, with the sixth engine built (SN06) passing its first tests without exhibiting signs of a problem that has plagued most of the five Raptors that came before it.
Resonance: not even once
In his tweet, Musk cryptically noted that a “600 Hz Raptor vibration problem” appears to have been fixed as of SN06’s first few static fire tests since arriving in McGregor, Texas. More likely than not, the self-taught SpaceX executive is referring to the hell that is mechanical resonance in complex machines and structures. Shown below, the Tacoma Narrows Bridge’s 1940 collapse – quite possibly the single most famous civil engineering failure of all time – is an iconic example of the unintuitive power of resonance in complex systems.
When it was inaugurated, the first Tacoma Narrows Bridge was one of the longest suspension bridges ever built and implemented new techniques and technologies that had never been tried at such a large scale. As Grady (Practical Engineer) aptly notes, mechanical resonance – in this case, triggered by consistent winds running through the Puget Sound – simply wasn’t something that period engineers knew they had to worry about. When rapidly pushing the envelope of engineering and construction, the chances of discovering entirely novel failure modes also increases – it’s simply one of the costs of extreme innovation.
Luckily for SpaceX, the company doesn’t have to clash with the immense challenge of testing something as large, complex, and expensive as a suspension bridge. Raptor, Starship, and Super Heavy need not necessarily be perfect on SpaceX’s first try, whereas civil bridges must essentially be flawless on the first try, despite being one of a kind. This is why SpaceX has been chewing through an average of one Raptor engine per month since February 2019 – by testing engines to destruction and aggressively comparing engineering expectations with observed behavior and post-test hardware conditions, rapid progress can (theoretically) be made.
Instead of spending another year or more analyzing models and testing subscale engines and components, SpaceX dove into integrated testing of a sort of minimum-viable-product Raptor design, accepting that the path to a flightworthy, finalized design would likely be paved with one or several dozen destroyed engines. According to Musk, the biggest pressing design deficiency involved a mode of mechanical resonance that may or may not have been predicted over the course of the design process. Dealing with unprecedented conditions, it’s not particularly surprising that some sort of new resonance mode was discovered in Raptor.
For the time being, SpaceX continues to work around the clock to build its first two orbital Starship prototypes (one in Texas, one in Florida), while also outfitting Starhopper and completing any possible engine-less tests in anticipation of the first flightworthy Raptor’s arrival. If Musk’s early analysis proves correct and Raptor SN06 makes it through lengthier static fire tests unscathed over the next week or so, the engine could potentially be delivered to Boca Chica as early as mid-July.
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Elon Musk
Elon Musk shares SpaceX’s directive that destroys a prevalent media narrative
Musk’s comments followed Starlink’s initiatives for people affected by severe flooding in Indonesia and Cyclone Ditwah in Sri Lanka.
Elon Musk recently shared SpaceX’s standing policy to offer free Starlink service during natural disasters worldwide, highlighting the company’s commitment to pursue aid over profit during times of need.
Musk’s comments followed Starlink’s initiatives for people affected by severe flooding in Indonesia and Cyclone Ditwah in Sri Lanka.
Starlink activates free service in Indonesia and Sri Lanka
Starlink recently announced free service for those impacted by severe flooding in Indonesia’s Sumatra region, partnering with the government to deploy terminals rapidly to the hardest-hit areas. The offer extends to new and existing customers through December, restoring connectivity in zones where traditional networks have failed due to infrastructure damage.
Musk quoted the post on X, writing, “SpaceX standard policy is to make Starlink free whenever there is a natural disaster somewhere in the world. It would not be right to profit from misfortune.”
Starlink extended the same relief to Sri Lanka amid Cyclone Ditwah, coordinating with local authorities for additional support. The cyclone battered the island nation with heavy rains and winds, disrupting communications for thousands. Free access also lasts until year-end, emphasizing Starlink’s role in bridging gaps during crises.
-->“For those affected by the severe flooding in Indonesia and Sri Lanka in the aftermath of Cyclone Ditwah, Starlink is providing free service to new and existing customers through the end of December 2025. We’re also working with the Indonesian government to rapidly deploy terminals and restore connectivity to the hardest-hit areas on Sumatra, as well as with the Sri Lankan government to provide additional assistance,” Starlink wrote in a post on its official website.
Musk’s companies routinely provide aid
Musk’s firms have a track record of providing critical support in crises, often without fanfare, challenging portrayals of him as a comic book villain intent on enriching himself on the backs of a suffering populace. In January 2024 alone, Tesla opened Superchargers for free in Japan’s Hokuriku region after a magnitude 7.6 earthquake killed at least 55 and injured hundreds.
Similar efforts include Starlink deployments for the 2023 Maui wildfires, 2024 Hurricane Helene in North Carolina, and floods in Texas, where the service was used to help facilitate emergency coordination. These actions, which total millions in waived fees and logistics, demonstrate a proactive ethos among Musk’s companies, with Musk noting in past interviews that such aid stems from engineering solutions over optics.
The initiatives also provide a direct rebuttal of Musk’s characterization on mainstream media, which tends to lean negatively. This has become much more notable in recent years as Musk adopted more conservative policies. These negative sentiments came to a head earlier this year when Tesla stores, vehicles, and even some owners, were attacked during waves of anti-Tesla protests.
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Tesla Cybertruck welcomed with open arms in South Korea
The event featured interactive demos, a light show with the full Tesla lineup, and announcements including FSD Supervised’s planned rollout to Cybertruck by the end of 2025.
Tesla Korea handed over its first 30 Cybertrucks to owners on Thursday during a ceremonial event at the Cultural Reserve Base in Seoul, marking the all-electric pickup truck’s official debut outside North America.
The event featured interactive demos, a light show with the full Tesla lineup, and announcements including FSD Supervised’s planned rollout to Cybertruck by the end of 2025.
A historic delivery event
The November 27 event transformed a former oil reserve warehouse into a symbolic launchpad for electric mobility. Attended by 30 new owners, the event included hands-on activities such as hammer-strike durability tests, accessory sales, a lucky draw, and group photos. It culminated in a synchronized light show featuring the 30 Cybertrucks alongside Model S, Model 3, Model X, and Model Y vehicles, which drew cheers from attendees.
Yvonne Chan, Tesla APAC Regional Director, joined as a special guest to celebrate the delivery milestone. Tesla Korea President Seo Young-deuk was also in attendance, and shared his optimism for the company’s momentum in the country.
“Korea is currently the third-largest market for Tesla sales worldwide, and this year, for the first time, it has achieved the No. 1 spot in imported car brand sales volume, Tesla Korea is growing at an incredibly rapid pace,” he said. “To repay this love from our customers, Tesla plans to continue investing in the Korean market and enhancing the customer experience.”
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Seo announced the official introduction of Full Self-Driving (Supervised) in Korea, with Cybertrucks slated for inclusion by the end of 2025, which promoted applause from the event’s attendees. With even the Cybertruck expected to receive FSD this year, Tesla Korea’s fleet could very well become the country’s most advanced vehicles overnight.
Infrastructure growth remains a priority to support Tesla Korea’s expanding fleet. Tesla Korea’s Supercharger network currently includes 166 sites with 1,133 stalls, with V4 units planned for nationwide highway rest areas to boost long-distance travel. The company also operates seven stores and 15 service centers, though plans are underway to double both by 2027. A new store in Incheon’s Songdo district is scheduled to open by December 2025, enhancing accessibility for western Seoul-area customers.
Seo concluded, “Through all-encompassing investments spanning products, charging infrastructure, and service networks, Tesla Korea will deliver the most refined electric vehicle experience to Korean customers.”
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Tesla China delivery centers packed as Q4 2025 enters its final month
Fresh photos from delivery centers in the country show rows upon rows of Model Ys and Model 3s.
Tesla’s delivery centers in China are filled with vehicles as the company ramps up for its final push in Q4 2025. Fresh photos from delivery centers in the country show rows upon rows of Model Ys and Model 3s, signaling strong end-of-quarter momentum.
A delivery push for Q4 2025
A recent aerial shot from a Tesla delivery center in China captures the company’s efforts to deliver as many vehicles as possible as the year comes to a close. As could be seen in the image, which was posted by on X by Tesla enthusiast Nic Cruz Patane, the facility was filled with numerous Model Y and Model 3 units, each vehicle seemingly ready to be handed over to customers.
Echoing the scene, another post, reportedly from two weeks prior, showed a similar scene in a Shanghai location, which was packed with Model Y units. X user Roberto Nores shared the photo, noting that the image also shows multiple Model Y Ls, a six-seat extended wheelbase version of the popular all-electric crossover.
Towards a strong Q4 finish
China remains Tesla’s volume powerhouse, accounting for a good portion of the company’s global deliveries in recent quarters. That being said, reports did emerge in early November stating that the company only reached 26,006 retail sales during October, as noted in a CNEV Post report. The reasons for this remain to be seen, though a focus on exports could have been a contributing factor.
Tesla China does seem to be hinting at some momentum this November. Just recently, Tesla watchers observed that the order page for the Model Y in China shows a message informing customers that those who wish to guarantee delivery by the end of the year should purchase an inventory unit. This was despite the Model Y RWD and Model Y L showing an estimated delivery timeline of 4-8 weeks, and the Model Y Long Range RWD and Model Y Long Range AWD showing 4-13 weeks.
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Elon Musk shares SpaceX’s directive that destroys a prevalent media narrative
Tesla Cybertruck welcomed with open arms in South Korea
