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SpaceX wants to unleash Starhopper but longer Raptor test fires come first

SpaceX has reportedly fired a Raptor engine for more than 40 seconds, a necessary step along the path to untethered Starhopper test flights. (SpaceX & NASASpaceflight/bocachicagal)

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According to SpaceX CEO Elon Musk, the next round of Starhopper activity will focus on removing the spacecraft prototype’s tethers and performing far more substantial hop tests.

Longer tests demand that SpaceX begins expanding the known performance envelope of its full-scale Raptor engine. Towards that end, longer-duration tests would need to be done at the company’s McGregor, TX development facilities to reduce risk, tests that Musk confirmed are already well underway. A recent Raptor static fire reportedly lasted no less than 40 seconds, more than enough time for a single-engine Starhopper to significantly expand both the maximum altitude and velocity of future hop tests. In support of the upcoming Starhopper test campaign, significant construction work is also ongoing at SpaceX’s Boca Chica test and development facilities.

Starhopper awaits its return to hop testing, April 24th. (NASASpaceflight – bocachicagal)

Unleashing the Hopper

During the months of March and April, SpaceX’s South Texas team effectively completed Starhopper and put the prototype through its first real tests. The process began with tank proof tests in which Starhopper’s tanks were filled with liquid nitrogen – relatively neutral and unreactive – to safely identify and repair any leaks, while also subjecting the vehicle to cryogenic temperatures. The proof testing also put the newly installed ground systems (GSE) and vehicle-pad connection hardware through their paces before moving to Starhopper’s nominal liquid oxygen and liquid methane propellant.

Following at least half a dozen or so wet dress rehearsals (WDRs) that saw Starhopper loaded with LOx and methane, SpaceX technicians analyzed the health of the prototype and soon began live tests with a Raptor engine installed. Designed to produce no less than 2000 kN (450,000 lbf, 205 mT) of thrust at full throttle, Raptor offers more than twice the max thrust of the latest variant of the Merlin 1D engine that powers Falcon 9 and Heavy (941 kN or 212,000 lbf). In other words, a single Raptor should be more than enough to lift Starhopper off the ground 150+ tons of propellant aboard.

In the above tweets, Musk indicates that Starhopper’s next step will be untethered hop tests powered by one Raptor engine. This is further supported by confirmation that Raptor completed its longest static fire test yet on April 27th.

After several unsuccessful test attempts, Starhopper completed two static fires (<10s combined) and hopped – tethered – a handful of feet off the ground on April 3rd and 5th, three weeks after Raptor was first installed. Days later, the lone Raptor engine was removed from Starhopper and shipped back to SpaceX’s Hawthorne, CA factory or McGregor, TX testing facilities for post-test analysis and inspection. In short, SpaceX used Starhopper as a sort of ad hoc test stand for the second serial Raptor (SN02) produced, completing two major acceptance tests simultaneously.

A handful of concise tweets published by Musk in the last few days of April implicitly confirmed that the next steps for Starhopper involved untethered flights off its South Texas pad, once again powered by a single Raptor engine. As both the prospective altitudes and flight times rise for future Starhopper tests, so do the risks posed to SpaceX’s adjacent facilities and the prototype itself. To minimize those risks and progress the Raptor program as a whole, SpaceX has been extensively testing the third serial Raptor (SN03) at its McGregor facilities. Instead of a rushed test regime similar to the one that almost completely destroyed Raptor SN01 less than two weeks after testing began, SN03 is participating in a more cautious and systematic series of tests.

Technicians work inside Starhopper’s LOx tank on April 22nd. (NASASpaceflight – bocachicagal)
While almost impossible to visualize the changes from a flat perspective, several dozen trucks of dirt and concrete were delivered to Starhopper’s pad last week. (NASASpaceflight – bocachicagal)

Confirmed by Elon Musk, this included significantly increasing the length of Raptor SN03’s latest static fires, culminating in an April 27th test that lasted ~40 seconds. Above all else, long test fires are necessary to demonstrate that Raptor can reliably operate for dozens of seconds at a time, given that any failure leading to a loss of thrust could cause Starhopper – basically a controlled explosive device – to fall out of the sky. The famous Musk/SpaceX ethos of moving fast and breaking things does not preclude a pragmatic attitude towards the destruction of facilities and prototypes that could take months and millions of dollars to rebuild.

The ETA of future hop tests is unclear. For the time being, it appears that SpaceX’s South Texas facilities will be caught up in construction work for at least another week. Whether or not Raptor SN03 is next in line for installation on Starhopper, SpaceX will likely put it through several more long-duration static fires before moving ahead with untethered hop tests. All things considered, the rough Starship prototype is unlikely to restart powered testing for another two or so weeks. Stay tuned!

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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 Full Self-Driving’s European launch frustrations revealed by Elon Musk

Tesla plans to launch Full Self-Driving in Europe later this year, but regulatory bodies are proving to make it a bigger challenge than it needs to be.

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Credit: Tesla Europe and Middle East | X

Tesla Full Self-Driving is set to launch in Europe in the future, but the region’s governing bodies are not giving the suite any chance to move forward, according to CEO Elon Musk, who blames the regulatory processes for robbing citizens of a safer mode of travel.

The automaker revealed late last year that it planned to bring Full Self-Driving to Europe sometime in 2025. However, Musk said that the launch of the suite is being continuously prolonged by both individual and European Union officials, dragging their feet with approvals.

In a post on X on Wednesday, Musk said the company is still dealing with and waiting for approvals from both the Dutch government and the EU’s governing officials, giving an indication that some progress has been made, but ultimately, there are still some bodies that are taking their time:

He continued by stating that the delays are “very frustrating” and they “hurt the safety of people in Europe” because of Autopilot’s statistical prowess, which shows it is much safer than human drivers.

Tesla is readying for the launch of a completely driverless Robotaxi platform in the U.S., which is set to occur in the coming days. While the initial rollout of the platform will be reserved for a select few, public rides are slated for June 22, meaning anyone will be able to come to Austin and hail a Tesla Robotaxi through the company’s smartphone app.

The first Robotaxi without a driver was spotted in Austin yesterday and shared on X:

First Tesla driverless robotaxi spotted in the wild in Austin, TX

Musk dropped several hints that the Robotaxi launch, which has been rumored for June 12, is imminent. For now, the operation will take place in Austin and will eventually expand, likely to California next, as noted in past reports. The City’s official website confirmed that Tesla gained a license as an Autonomous Vehicle operator in the City of Austin earlier this week.

Tesla applied for a similar license in California earlier this year.

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Energy

Tesla Lathrop Megafactory celebrates massive Megapack battery milestone

The Tesla Megapack is the backbone of Tesla Energy’s battery deployments.

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Credit: Tesla Megapack/X

The Tesla Lathrop Megafactory recently achieved a new milestone. As per the official Tesla Megapack account on X, the Lathrop Megafactory has produced its 15,000th Megapack 2 XL battery.

15,000 Megapack Batteries

Tesla celebrated the milestone with a photo of the Lathrop Megafactory team posing with a freshly produced Megapack battery. To commemorate the event, the team held balloons that spelled out “15,000” as they posed for the photo.

The Tesla Megapack is the backbone of Tesla Energy’s battery deployments. Designed for grid-scale applications, each Megapack offers 3.9 MWh of energy and 1.9 MW of power. The battery is extremely scalable, making it perfect for massive energy storage projects.

https://twitter.com/Tesla_Megapack/status/1932578971700638203

More Megafactories

The Lathrop Megafactory is Tesla’s first dedicated facility for its flagship battery storage system. It currently stands as the largest utility-scale battery factory in North America. The facility is capable of producing 10,000 Megapack batteries every year, equal to 40 GWh of clean energy storage.

Thanks to the success of the Megapack, Tesla has expanded its energy business by building and launching the Shanghai Megafactory, which is also expected to produce 40 GWh of energy storage per year. The ramp of the Shanghai Megafactory is quite impressive, with Tesla noting in its Q1 2025 Update Letter that the Shanghai Megafactory managed to produce over 100 Megapack batteries in the first quarter alone.

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Tesla Energy’s Potential

During the first quarter earnings call, CEO Elon Musk stated that the Megapack is extremely valuable to the energy industry. 

“The Megapack enables utility companies to output far more total energy than would otherwise be the case… This is a massive unlock on total energy output of any given grid over the course of a year. And utility companies are beginning to realize this and are buying in our Megapacks at scale,” Musk said.

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News

Tesla launches “TeslaVision” video contest to celebrate Model Y deliveries

The program marks a revival of Tesla’s popular Project Loveday initiative back in 2017.

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Credit: Tesla Asia/X

Tesla has announced the TeslaVision Contest, a global video showcase inviting fans and owners to highlight the impact of the company’s vehicles on people. 

The program marks a revival of its Project Loveday initiative in 2017, which was extremely well-received by the electric vehicle community. 

A Contest to Celebrate the New Model Y

As per the TeslaVision contest’s official website, the program is being rolled out to commemorate the launch and deliveries of the new Model Y across all continents. Thus, the contest could be seen as a global celebration and showcase of owners and fans who made Tesla the household brand that it has become today.

Participants are tasked with creating a 90-second or shorter video demonstrating how Tesla vehicles provide “more freedom, more safety, more fun, more convenience.” Submissions must be uploaded to YouTube and shared on X and Instagram with the tag @Tesla and the phrase “TeslaVision contest.” 

Videos must align with Tesla’s mission to accelerate sustainable energy, be suitable for all ages, and avoid references to non-Tesla brands. English text or voice-overs are required, and entrants must relinquish rights to their content for Tesla’s commercial use.

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https://twitter.com/Tesla/status/1932559030892802153

A Big Prize Awaits

When Tesla launched Project Loveday in 2017, the company noted that the contest’s winner would receive an all-expenses paid invitation to an upcoming Tesla product launch. For TeslaVision, the grand prize is a lot more tangible, with the winner receiving a new Model Y AWD. They will also get an all-expenses-paid trip to Gigafactory Texas. Second and third-place winners will also receive a Giga Texas tour. 

Finalists will be selected based on creativity, originality, relevance to the prompt, and entertainment value. Tesla will shortlist 100 videos, with the top 10 subject to public voting to influence the final judging. The contest is open to legal residents of the United States, Mexico, and Canada, aged 18 or older, with a valid driver’s license and Tesla account. No purchase is necessary, though entries are limited to just one per person. 

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