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SpaceX CEO Elon Musk says major Starship engine bug is fixed as Raptor testing continues

Starhopper awaits its first truly flightworthy Raptor as CEO Elon Musk says SpaceX may have solved the technical bug delaying hop tests. (NASASpaceflight - bocachicagal, SpaceX)

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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.

An excellent overview of the challenges and fairly young history of mechanical resonance in modern engineering.

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.

The first finalized Raptor engine (SN01) completed a successful static fire debut on the evening of February 3rd. (SpaceX)
Just five days after its first ignition, SpaceX successfully tested Raptor SN01 at more than twice the thrust of Merlin 1D. (SpaceX)
The latest official photo of Raptor testing in McGregor. This engine is likely SN06, the sixth Raptor produced in 2019. (SpaceX/Elon Musk)

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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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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Tesla is trying to make a statement with its Q2 delivery numbers

Tesla’s aggressive promotions for its vehicles today are quite strategic.

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Credit: Tesla/X

It is no secret that Tesla had subpar delivery numbers in the first quarter. It was due to a number of things, most of all the changeover to the new Model Y across its factories worldwide. The results, however, were enough for critics, both longtime and new, to declare that Tesla is just about done.

Looking at Tesla’s recently rolled out promotions across its lineup, however, it seems like the electric vehicle maker is dead serious about proving its skeptics wrong. 

Promotions, Promotions Everywhere

Just recently, Tesla announced that it was rolling out yet another free FSD transfer program for its customers. Such a program is designed to encourage longtime Tesla owners who may be holding onto their old vehicles with FSD to upgrade to a newer car. Tesla noted that its free FSD transfer is available for the Model S, X, 3, Y, and the Cybertruck in North America.

Tesla also announced a 0% APR financing program for new Model 3 orders in the United States. The Model 3 Performance even received an extra incentive, with the company offering premium paint colors such as Deep Blue Metallic and Pearl White for free with every vehicle purchase. Owners of Model Y classic units are also offered a $2,000 discount off the price of a new Model Y. Cybertruck customers, on the other hand, are offered special leasing rates.

Over in China, Tesla has announced a five-year, zero-interest financing program for the new Model Y. A similar program was also made available for the Model 3 sedan.

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Taking Control of the “Demand Issue” Narrative

Tesla’s aggressive promotions for its vehicles today are quite strategic. The United States and China, after all, are two of the company’s largest markets. If Tesla wishes to post healthy delivery numbers this Q2, robust delivery numbers in the U.S. and China are practically required. 

When Tesla announced its earnings earlier this week, critics were overjoyed to see that the company had seen a notable drop in revenue. Arguments about the company’s demand issues were highlighted anew as well. It’s ironic, but just a few months after the Model Y secured its place as the world’s best-selling car by volume for the second year in a row, arguments about Tesla’s demand issues are abounding once more.

It remains to be seen if Tesla’s aggressive promotions this Q2 will make a difference in its vehicle sales worldwide. But if the company ends the second quarter with an impressive number of vehicle deliveries, it could take control of its demand narrative with authority. 

A Potential Elon Musk Point

A healthy delivery result for the second quarter may also renew faith among investors that CEO Elon Musk is indeed serious about leading Tesla to new heights. Over the past months, Musk’s attention had been evidently focused on his activities with the Trump administration’s Department of Government Efficiency (DOGE), but during the Q1 2025 earnings call, the CEO stated that he would be spending more time at Tesla starting May. 

This suggests that Musk would be extremely hands-on with the electric car maker for the majority of Q2 2025. Tesla is typically at its best when pushed by its aggressive CEO, so it would be interesting to see just how far the company could go before the end of June 2025.

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BYD profit surges 100.4% as smart EVs drive growth

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(Credit: BYD)

China’s leading automaker, BYD, reported a 100.4% profit surge in the first quarter, partly driven by its smart electric vehicle (EV) features. BYD’s net profit reached 9.2 billion yuan ($1.26 billion), exceeding the company’s earlier forecast of RMB 8.5 billion ($1.1 billion) to RMB 10 billion ($1.3 billion), according to a Friday stock filing.

The Chinese automaker’s revenue for the quarter hit RMB 170.4 billion ($23 billion), up 36.4% year-on-year, though growth slowed from the prior quarter’s 52.7% rise. BYD’s dominance in China grew stronger, with its market share climbing to 13.6% from 12.1% a year earlier. The company’s “God’s Eye” driver-assistance system–now standard across its lineup at no extra cost–and a new supercharging EV platform have fueled its edge.

Industry observers noted that BYD’s strides with God’s Eye and EV supercharging platform have encouraged Leapmotor, Geely, and Toyota to push harder with their affordable smart EVs. BYD’s strategy of slashing prices while enhancing technology has roiled the market, solidifying its lead in China’s fiercely competitive EV sector.

Beyond its home market, BYD aims to export 800,000 vehicles this year. However, its European expansion has faced hurdles. The Chinese company’s rapid response to its European challenges reflects its broader ambition to dominate global EV markets.

BYD’s ability to combine affordability with advanced features has pressured competitors to adapt, intensifying the global race for EV supremacy. In China, BYD’s price war shows no signs of slowing, with its market share gains signaling robust demand for its smart, cost-competitive vehicles. As BYD refines its international strategy, its first-quarter performance underscores its growing influence in the automotive industry.

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Note: BYD sells hybrids and internal combustion engine cars alongside its electric vehicles.

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D.C. suspect faces charges for vandalizing Tesla vehicles

49-year-old Justin Fisher hit 4 Teslas across D.C. in March. Prosecutor says the acts were meant to “suppress political speech.”

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(Credit: Tesla)

A Washington, D.C., man has been charged with vandalizing Tesla vehicles across Northeast D.C., with authorities labeling the acts as domestic terrorism. Tesla vandalism attacks increased in the first quarter.

Justin Fisher, 49, faces four misdemeanor counts of defacing public or private property for incidents between March 1 and March 21, 2025, U.S. Attorney Edward R. Martin Jr. and Metropolitan Police Department Chief Pamela Smith announced.

Court documents outline Fisher’s alleged offenses, which targeted Tesla vehicles owned by multiple victims. The first case of Tesla vandalism occurred on March 1 at 10:11 a.m. in the 200 block of K Street, followed by a second on March 2 at 6:15 p.m. in the 200 block of 11th Street. The third time Fisher reportedly vandalized a Tesla was on March 8 at 8:05 a.m. in the 600-700 blocks of F Street. The last time the suspect vandalized a Tesla was on March 21 at 5:15 p.m. in the 600 block of G Street. Fisher was arrested on April 1, 2025, by the Metropolitan Police Department, which continues to investigate the cases.

“The so-called ‘Tesla Takedown’ is domestic terrorism, and my team is taking it on front and center,” said U.S. Attorney Martin. “These attacks are not just an attack on someone’s property. They are meant to intimidate and suppress political speech and shut down the marketplace of ideas,” Martin said. The U.S. Attorney’s Office for the District of Columbia is prosecuting the case.

“If you target Tesla and break the law, then you can expect consequences,” said Attorney General Pamela Bondi. “This Department of Justice will not tolerate such criminal acts.”

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Fisher appeared in Superior Court and was released on personal recognizance. His initial status hearing is set for June 10, 2025. The misdemeanor charges carry significant weight due to their domestic terrorism designation, signaling a broader crackdown on ideologically driven property crimes. The attacks highlight tensions surrounding Tesla, which has faced scrutiny and admiration alike from the public.

The case underscores the challenges of balancing free expression with criminal accountability. As the investigation unfolds, authorities aim to clarify Fisher’s motives.

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