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SpaceX’s thin-skinned Starship ‘test tank’ passes first trial

Elon Musk says that SpaceX's first 3mm-thick Starship test tank passed its first major trial. (LabPadre)

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CEO Elon Musk says that a new thin-skinned Starship ‘test tank’ just passed its first trial, taking advantage of delays to Starship SN9’s planned high-altitude launch debut.

Delayed by a lack of FAA approval for unknown reasons, Starship SN9’s 12.5-kilometer (7.8 mi) launch debut (virtually identical to SN8’s 12.5 km launch last month) is in limbo pending an “FAA review” according to Musk. SpaceX thus found itself with at least 24 hours of guaranteed inactivity for Starship SN9, time the company rapidly chose to fill with crane transportation and, more importantly, the first Starship ‘test tank’ stress test in months.

Known as Starship SN7.2, SpaceX’s latest ‘test tank’ is the third to carry the SN7 moniker and appears to have been built primarily to test refinements to the rocket’s structural design. Following test tanks SN7.0 and SN7.1, both used to qualify the use of a new steel alloy on an otherwise unchanged design, SN7.2 – likely built out of the same alloy – is instead focused on determining if SpaceX can begin trimming the margins of an increasingly mature technology.

Starship test tank SN7.0 and SN7.1. (NASASpaceflight – bocachicagal)
SN7.2. (NASASpaceflight – bocachicagal)

Curiously, SN7.2 is a sort of fusion of its predecessors: combining the stout stature of SN7.0 with SN7.1’s use of an aft thrust dome, but without SN7.1’s Starship-style skirt (the three rings at its bottom). Welded directly to its black test stand, it’s unclear why SpaceX chose to give SN7.2 a thrust dome, given that the thrust of Raptor engines can only be simulated with hydraulic rams if the tank is installed on one of two Starship launch mounts.

Regardless, whether SpaceX actually tests that aspect of SN7.2, the tank’s most important task is determining if future Starships (and perhaps Super Heavy boosters) can be built out of thinner, lighter steel rings. Its domes appear to be identical to past ships but writing on the exterior of the tank strongly implied that its three rings were built out of 3mm steel rather than the 4mm sheets that have made up every Starship built in the last 12 months.

SpaceX began loading the thin-skinned tank with liquid nitrogen (used to simulate cryogenic propellant without the risk of an explosion) around 9am CST and spent around three hours performing an “initial pressure test.” It’s unclear what that test entailed but it most likely involved raising the tank’s internal pressure to levels achieved by SN7.0 and SN7.1 Musk has previously said that that 6 bar was the bare minimum necessary for orbital flight, translating to 7.5-8.5 bar to achieve an industry-standard safety margin of 25-40%.

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That SN7.2 survived that initial pressure test bodes well for the significant mass reductions SpaceX will need to optimize Starships for efficient orbital flight, potentially shaving 5-10 metric tons off the dry mass of future ships. For orbital rocket stages, every single kilogram of mass reduction translates to an extra kilogram of cargo capacity, whereas boost stages (i.e. Super Heavy) offer far more lenient ratios on the order to 10:1, meaning that adding 5-10 kilograms of rocket hardware reduces maximum payload capacity by just ~1 kg.

Depending on when SpaceX is allowed to launch Starship SN9, the company’s next test could involve pressurizing SN7.2 until it bursts, determining if the tank’s thinner skin substantially impacts its performance as a pressure vessel.

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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Elon Musk assures Tesla investors he will enhance his security detail

Musk’s comments were posted on X in the aftermath of the slaying of conservative commentator Charlie Kirk.

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MINISTÉRIO DAS COMUNICAÇÕES, CC BY 2.0 , via Wikimedia Commons

Tesla CEO Elon Musk has assured TSLA investors that he would be enhancing his security detail. 

Musk’s comments were posted on X in the aftermath of the slaying of conservative commentator Charlie Kirk.

Aggressive critics

Kirk was slain during a speaking engagement at Utah Valley University as part of Turning Point USA’s first event on a tour of college campuses, as noted in a Politico report. Kirk was a notable voice in the conservative movement and a close ally of the Trump administration, which led to aggressive critics openly wishing him harm. 

Elon Musk, due to his contributions to the Trump campaign and his later work with the Department of Government Efficiency (DOGE), has also attracted a substantial amount of vitriol from critics. Tesla owners and the company itself suffered attacks due to critics’ anger towards Musk, with several stores and cars being vandalized or victimized in arson attacks.

Despite having stepped back from his work with DOGE, Musk remains a target among critics online, with some still calling for the CEO to get the “Luigi Mangione” treatment. These sentiments were notable after Kirk’s slaying, with some users on platforms such as Reddit and Bluesky arguing that Musk or Donald Trump should be next after Kirk. 

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Concerns and assurances

In the aftermath of Kirk’s slaying, numerous Tesla retail investors called on the company’s Board of Directors to bolster Elon Musk’s security detail. With some social media users openly calling for Musk to be slain next, such a request made sense. This was highlighted by Tesla investor Alexandra Merz, who called on the Tesla Board to drastically increase the company’s budget for Elon Musk’s security, which currently stands at just $3.3 million annually, or about $235,000 per month.

In response to the Tesla investor’s comments, Musk responded that he would “definitely need to enhance security.” Musk’s response was well appreciated by the Tesla and electric vehicle community as a whole, with some users on X stating that the CEO must be kept safe.

Musk is a key part of Tesla, and this was highlighted in the company’s proposed 2025 CEO performance award, which outlines a path towards the company attaining a market cap of $8.5 trillion. In its filing, Tesla highlighted that Elon Musk’s leadership is a fundamental part of the company and its future. 

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This signature Tesla feature is facing a ban in one of its biggest markets

The report indicates that Chinese government agencies have concerns “about failure rates and safety issues with the flush design.”

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A signature Tesla feature is under fire in one of the company’s largest markets, as regulators in one EV hot spot are mulling the potential ban of a design the automaker implemented on some of its vehicles.

Tesla pioneered the pop-out door handle on its Model S back in 2012, and CEO Elon Musk felt the self-presenting design was a great way to feel like “you’re part of the future.”

It is something that is still present on current Model S designs, while other vehicles in the Tesla lineup have a variety of handle aesthetics.

How to repair your Tesla Model S Door handle (DIY Kit)

According to Chinese media outlet Mingjing Pro, the company, along with others using similar technology, is facing scrutiny on the design as regulators consider a ban on the mechanism. These restrictions would impact other companies that have utilized pop-out handles on their own designs; Tesla would not be the only company forced to make changes.

The report indicates that Chinese government agencies have concerns “about failure rates and safety issues with the flush design.”

However, EVs are designed to be as aerodynamically efficient as possible, which is the main reason for this design. It is also the reason that many EVs utilize wheel covers, and sleek and flowing shapes.

However, the Chinese government is not convinced, as they stated the aerodynamic improvements are “minimal,” and safety issues are “significantly elevated,” according to The Independent.

The issue also seems to be focused on how effective the handle design is. According to data, one EV manufacturer, which was not specified in the report, has 12 percent of its total repairs are door handle failure fixes.

There are also concerns about the handles short-circuiting, leaving passengers trapped within cars. Tesla has implemented emergency latch releases in its vehicles that would prevent passengers from getting stuck in their cars in cases of electric malfunctions or failures.

However, evidence from the Chinese Insurance Automotive Technology Research Institute (C-IASI) suggests that 33 percent of door handles using this design fail to function after a side impact.

Obviously, Tesla and other automakers could introduce an alternative design to those vehicles that are affected by the potential restrictions China intends to impose. The regulation would take effect in July 2027.

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Tesla is bailing out Canadian automakers once again: here’s how

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(Credit: Tesla)

Tesla is bailing out Canadian automakers once again, as some companies in the country are consistently failing to reach mandated minimum sales targets for emission-free vehicles.

Many countries and regions across the world have enacted mandates that require car companies to sell a certain percentage of electric powertrains each year in an effort to make sustainable transportation more popular.

These mandates are specifically to help reduce the environmental impacts of gas-powered cars. In Canada, 20 percent of new car sales in the 2026 model year must be of an emissions-free powertrain. This number will eventually increase to 100 percent of sales by 2030, or else automakers will pay a substantial fine — $20,000 per vehicle.

There is a way companies can avoid fines, and it involves purchasing credits from companies that have a surplus of emissions-free sales.

Tesla is the only company with this surplus, so it will be bailing out a significant number of other automakers that have fallen short of reaching their emissions targets.

Brian Kingston, CEO of the Canadian Vehicle Manufacturers’ Association, said (via Yahoo):

“The only manufacturer that would have a surplus of credits is Tesla, because all they do is sell electric vehicles. A manufacturer has to enter into an agreement with them to purchase credits to help them meet the mandate.”

Tesla has made just over $1 billion this year alone in automotive regulatory credits, which is revenue acquired from selling these to lagging car companies. Kingstone believes Tesla could be looking at roughly $3 billion in credit purchases to comply with the global regulations.

Tesla still poised to earn $3B in ZEV credits this year: Piper Sandler

Automakers operating in Canada are not putting in a lack of effort, but their slow pace in gaining traction in the EV space is a more relevant issue. Execution is where these companies are falling short, and Tesla is a beneficiary of their slow progress.

Kingston doesn’t believe the mandates are necessarily constructive:

“We’ve seen over $40 billion in new investment into Canada since 2020 and all signs were pointing to the automotive industry thriving. Now the federal government has regulations that specifically punishes companies that have a footprint here, requiring them to purchase credits from a company that has a minimal (Canadian) footprint and an almost nonexistent employee base.”

Kingston raises a valid point, but it is hard to see how Tesla is to blame for the issue of other car companies struggling to bring attractive, high-tech, and effective electric powertrains to market.

Tesla has continued to establish itself as the most technologically advanced company in terms of EVs and its tech, as it still offers the best product and has also established the most widespread charging infrastructure globally.

This is not to say other companies do not have good products. In my personal experience, Teslas are just more user-friendly, intuitive, and convenient.

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