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SpaceX’s odd Starbase propellant storage tank prototype passes first test

A prototype of SpaceX's custom-built Starbase propellant storage tanks appears to have passed its first test without issue. (NASASpaceflight - bocachicagal)

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Likely to the relief of many, SpaceX appears to have successfully tested a prototype of the custom-built Starbase propellant storage tanks that will eventually hold thousands of tons of fuel and oxidizer.

For reasons unknown, SpaceX’s built its first ground support equipment (GSE) ‘test tank’ – a subscale prototype designed to quickly verify basic production quality and design goals – months after it began mass-producing operational storage tanks. In fact, of the seven total GSE tanks expected to be built, SpaceX has already completed seven, installed five, and scrapped one. Known as GSE4, SpaceX actually used modified parts of that scrapped tank to assemble the GSE test tank that first rolled to Starbase’s launch (and test) facilities on August 23rd.

Two days later, SpaceX subjected the small tank to its first test.

Given that SpaceX appears to have almost retroactively assembled the GSE4 test tank after building the final products, the results from its testing were always going to be significantly more anxiety-inducing than any of the more than half-dozen other tanks the company has tested in the last year and a half. Having already fabricated, assembled, or even installed six of seven planned GSE tanks, the discovery of major issues during testing could potentially cause months of delays by forcing SpaceX to perform lengthy repairs or even fully scrap all six existing tanks and start over.

SpaceX has built itself a farm of propellant storage tanks that are almost identical to the tanks used on Starships and Super Heavy boosters. (NASASpaceflight – bocachicagal)

Thankfully, at least for the time being, it appears that SpaceX can write off those potential worst-case scenarios. On August 25th, SpaceX took advantage of a test window initially believed to be for Starship S20 and put the cobbled-together GSE4 tank through its paces for the first time. As with previous test tanks, all SpaceX can really do is fill the prototype with liquid nitrogen (LN2), a non-flammable alternative to liquid oxygen or methane propellant that is approximately as cold and heavy. As a storage tank prototype, though, GSE4 has no need for hydraulic ram setups used to simulate the thrust of Raptor engines on several previous prototypes.

As such, one or several cryogenic proof tests were all that were ever really in GSE4’s future. On GSE4’s first test, SpaceX performed a more or less normal cryogenic proof, completely filling the tank with LN2, closing its vents, and then allowing the natural process of LN2 boiloff to raise the tank to the desired test pressure. However, unlike other test tanks, GSE4 never actually appeared to reopen its main vents. In fact, SpaceX may have never actually drained liquid nitrogen from the test tank, instead simply letting it slowly warm up and boil off into gas that was seemingly managed and vented by ground systems instead of the tank itself.

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GSE4’s testing was more reminiscent of Starship test tank SN2 than anything.

As a result, GSE4 stayed frosty (indicating a significant amount of remaining liquid nitrogen) for more than eight hours, strongly implying that it was either very slowly drained or simply allowed to warm up naturally. Given that large cryogenic storage tanks really don’t have to be significantly pressurized to complete their job, it’s possible that GSE4’s first test was primarily meant to verify the basic structural integrity of a tank that’s slightly different than those on Starship and, more importantly, test a different method of pressure and fluid management where most of that work is done by external, permanent systems on the ground.

That’s exactly what one might expect of rocket tankage slightly modified to serve as ground storage tanks. SpaceX’s GSE tanks never have to act as self-contained units and can instead rely almost entirely on separate systems.

A GSE tank is ‘sleeved.’ (NASASpaceflight – bocachicagal)

Aside from verifying that that slightly different method of tank operations works as expected, GSE4’s first test likely also allowed SpaceX to better characterize the thermal properties of the thin steel skin and domes that are Starship and GSE tanks. Unlike GSE4, operational GSE tanks will be enclosed inside 12m (~40 ft) wide ‘cryo shells’ designed to insulate their cryogenic contents, but the insulative properties of the inner tanks (or the lack there of, rather) will still determine how well that insulation works and how much is actually needed to reach the desired boiloff rates. A contractor hired by SpaceX has already completed all seven cryo shells, so any results gathered from GSE4 will obviously be more of a check than a developmental test, but data is still data.

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 removed from Charlotte’s approved EV list due to ‘safety issues’

City reps say it’s not because of Elon Musk’s political involvement, but instead because of safety issues.

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Credit: Tesla

Tesla has been removed from the Charlotte, North Carolina, City Council’s list of pre-approved electric vehicles that the city can purchase.

It’s not because of Elon Musk, Democratic council member LaWana Mayfield said, who urged her colleagues to remove Tesla. Instead, she claims it is because of “safety issues.”

She said (via WFAE):

“So it is not just the particular owner of this product. It is the fact that this product has been in multiple lawsuits because of safety issues, and there are multiple concerns.”

Recent data from Tesla shows that its vehicles are about half as likely to be involved in an accident when being driven normally. When Autopilot technology is used, it is about ten times safer than the average driver in the U.S., statistically.

Tesla Vehicle Safety Report shows Autopilot is 10x better than humans

Republican City Council member Ed Driggs stood up for Tesla, saying that:

“I think we just set a dangerous precedent if we have reasons that aren’t related to the cost and the performance of purchased items for excluding them. We already have Teslas in the fleet.”

If they’re so dangerous, why are they already in the fleet?

The NHTSA also shows that Ford is the most recalled car company in 2025, with 81 total recalls. Tesla has just five for the year.

Driggs said to Mayfield during the meeting:

“We are not identifying names on this list. You are singling out one name on this list for political reasons. You don’t have enough data on Tesla compared to the other car companies to suggest they shouldn’t be here. I object to trying to disguise this as anything other than a politically motivated desire to not have this name on this list.”

Tesla was successfully removed by a 6-3 vote. Democrats Danté Anderson, Malcolm Graham, Renee Johnson, Victoria Watlington, and Tiawana Brown supported Tesla’s removal. Republican Edwin Peacock, along with Driggs and Democrat Dimple Ajmera, all voted no on removing Tesla.

The City of Charlotte will buy 45 new electric vehicles, and Teslas would likely be the best option. Many local law enforcement agencies across the U.S. have utilized them and have shown that the vehicles contribute to massive maintenance and cost of ownership reductions due to the lack of overall upkeep.

Tesla police fleet is saving taxpayers $80k per year on fuel costs: report

This is not the first time that a city in the U.S. has chosen to go in a different direction with its EV fleet plans. Tesla was chosen over Ford by the City of Baltimore for a $5 million expenditure that would bolster its fleet with EVs.

However, earlier this year, Baltimore said it “decided to go in a different direction,” and although it was not directly confirmed, the move seemed to be political.

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Tesla threatened in France with claims of ‘deceptive’ practices

Tesla has been threatened by the Competition, Consumer Affairs, and Fraud Control Office in France after the agency said it is participating in “deceptive business practices” related to its semi-autonomous driving capabilities.

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tesla side repeater camera
(Credit: Tesla)

Tesla has been threatened by the Competition, Consumer Affairs, and Fraud Control Office in France after the agency said it is participating in “deceptive business practices” related to its semi-autonomous driving capabilities.

Investigators in the government office said that Tesla has engaged in deceptive commercial practices over the capabilities of its cars. In the past, other agencies and even some skeptics have said that Tesla’s use of the phrases “Autopilot” and “Full Self-Driving” is inaccurate in terms of its capabilities.

Tesla Autopilot gets stone cast in its direction by Pete Buttigieg

However, Tesla has been transparent with consumers and regulatory agencies that its cars are not yet fully autonomous, meaning drivers could sleep, play on their phones, or pay no attention to the road. The car would take care of steering and speed.

Tesla has never maintained that its cars are capable of this. On its website and in its Owner’s Manuals, it says that drivers are required to pay attention and be prepared to take over in case of an emergency.

The office began the investigation back in 2023 and, this week, ordered Tesla to comply with regulations within the next four months. If it does not, it will face fines of €50,000 per day.

This is not the first time Tesla has had some pushback from regulators regarding the naming of its semi-autonomous driving platforms. Back in 2023, then Secretary of Transportation in the United States, Pete Buttigieg, said the name “Autopilot” was not accurate because it is still a hands-on system:

“I don’t think that something should be called, for example, an Autopilot, when the fine print says you need to have your hands on the wheel and eyes on the road at all times. We call balls and strikes. I view it as something where it’s very important to be very objective. But anytime a company does something wrong or a vehicle needs to be recalled or a design isn’t safe, we’re going to be there.”

He then said that Autopilot and its interaction with the person operating the car is a “real concern.”

 

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Tesla Robotaxi launch draws attention from regulators, mainstream media milks it

The Tesla Robotaxi launch has resulted in some questions from the NHTSA, a typical thing for early launches. Media is milking it as a huge thing.

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Credit: @AdanGuajardo/X

Tesla launched its Robotaxi platform in a limited capacity earlier this week in Austin, Texas, and after hundreds of rides have been taken, some instances have caught the attention of the National Highway Traffic Safety Administration (NHTSA).

However, the information the NHTSA is requesting is routine and totally normal for the early stages of a rollout of this magnitude. But that did not stop mainstream media from milking it into something controversial, when it really is not.

Tesla Robotaxi riders tout ‘smooth’ experience in first reviews of driverless service launch

Various outlets reported on the NHTSA’s request to Tesla for additional information regarding things seen in videos online.

The NHTSA said it is “aware of the referenced incidents and is in contact with the manufacturer to gather additional information.” Bloomberg initially reported on the NHTSA’s request for information.

The thing is, the NHTSA has often reached out to companies right after it launches a driverless vehicle service. Both Waymo and GM’s Cruise, as well as Amazon’s Zoox, have had the NHTSA reach out to them regarding the launch of their driverless ride-hailing services.

The headlines for Tesla are significantly different:

Reviews from riders in Austin have stated the Robotaxi platform is “smooth” and “comfortable,” with many ranting and raving about the advantages the new ride-hailing service has over others. Not only is it being monitored by a safety monitor in the passenger seat, but there are also other things that make it unique.

One of the most notable is that your Robotaxi will automatically sync entertainment and streaming settings.

The sensationalism that the media tends to use with Tesla is a big reason the company did not invite mainstream outlets to the event. Instead, reporters were seen waiting for Early Access invitees to exit their cars to ask them questions.

Many denied the inquiries:

Elon Musk responded to that video by saying “Lmao,” an acronym for “laughing my ass off.”

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