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SpaceX tests Starship and Frankenstein ‘test tank’ simultaneously

Starship S20 and test tank B2.1 enjoy some simultaneous venting. (NASASpaceflight - bocachicagal)

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4 years ago

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After another few weeks of downtime, SpaceX has simultaneously tested the first orbital-class Starship prototype and a Frankenstein-esque ‘test tank’ at its South Texas facilities. While nothing that occurred was all that visually spectacular, the afternoon of testing was still noteworthy for a couple of reasons.

First up, following a successful six-engine Raptor static fire – the first in Starbase history – on November 12th, all signs pointed to Starship S20 attempting another static fire (its fourth) on December 1st. In the almost three weeks of inactivity between those planned tests, SpaceX likely performed extensive inspections of the pathfinder prototype and its Raptor engines. Technicians also repaired the minor heat shield damage and tile loss that testing incurred and patched a few other ‘holes’, effectively leaving Ship 20 with the first fully finished heat shield by the end of November.

Earlier this week, one of the few remaining Boca Chica Village residents received a safety notice from SpaceX indicating that a static fire test was scheduled on Wednesday, December 1st – followed soon after by a notice to mariners (NOTAM) warning boaters to keep to a safe distance. Two hours into the 10am to 6pm CST test window, Starship S20 was already venting and starting to get frosty, confirming that propellant loading had begun. A little over an hour later, it was clear that SpaceX had aborted the first static fire attempt of the day. For the next three hours, Ship 20 exhibited some unusual behavior including new vents, an apparent header tank pressurization or fill test, and still more odd venting in new places.

In the middle of Starship’s weird nose-related testing, SpaceX began simultaneously loading a new ‘test tank’ known as B2.1 with liquid nitrogen (LN2) – marking the first truly simultaneous test of multiple Starship test articles. As Ship 20 seemingly detanked for the second time that day, the B2.1 tank was fully loaded with LN2 and apparently pressure-tested not long after. A few hours later, the test tank was also detanked and the road to the pad was reopened, marking the end of the day’s testing.

Normally, nothing is particularly unusual or noteworthy about test tank testing. Since January 2020, SpaceX has routinely built and tested tanks that are effectively just shorter versions of actual tanks and hardware, using them to qualify changes to Starship’s design, materials, operations, and more before applying those changes to full-size prototypes. B2.1 is the tenth dedicated test tank to reach the launch pad in a little under two years.

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Normally, the ‘B2.1’ name SpaceX has given the tank would imply that it’s a newer booster test tank (using Bx instead of BNx) following in the footsteps of BN2.1, which passed cryogenic and load testing this summer. Instead, though, B2.1 is a bit of a nightmarish amalgamation of seemingly random Starship and Super Heavy parts. Its forward dome is an old, unused booster section complete with the hexagonal structure grid fins would have been brace against. Its aft section is a booster thrust structure. Up to that point, it’s effectively just a copy of BN2.1.

However, SpaceX inexplicably installed a Starship thrust dome inside B2.1’s booster thrust structure, creating a test tank with no obvious relevance to any conceivable Starship or Super Heavy design or prototype. Further, SpaceX rolled B2.1 to the launch site for testing only after installing it on an unused device that’s believed to be the aft half of a dedicated booster structural test stand. In theory, a sort of ‘cap’ would be fitted on top of a booster or test tank installed in the stand’s base and strong cables would connect the two, allowing SpaceX to subject prototypes to compressive stress – like, perhaps, the forces a booster might experience while carrying a fully-fueled 1300-ton Starship to space. The upper half of that test structure has yet to be moved to the launch site.

Since this diagram was published, SpaceX has also tested BN2.1, GSE-4, and now B2.1.

Altogether, the weird half-complete test stand and bizarre fusion of ship and booster parts make B2.1’s purpose and initial testing a complete mystery. It’s unclear what value it provides that makes it more of a priority than, say, finally starting to test the first flightworthy Super Heavy booster (B4). Ultimately, the most interesting thing about B2.1’s test debut is the fact that it appears to mark the first use of Starbase’s brand new orbital tank farm, which is approaching completion.

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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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Elon Musk

Tesla CEO Elon Musk says this common issue is ‘major area of focus’

Tesla, like any other company, goes through hardware issues with its vehicles, but some are more publicized than others.

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12 hours ago

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September 19, 2025

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Credit: Tesla

Elon Musk said this afternoon on X that a commonly reported issue with the Tesla vehicles is a “major area of focus” for the company.

Tesla, like any other company, goes through hardware issues with its vehicles, but some are more publicized than others.

However, the simple yet annoying issues that owners encounter through thousands of miles of driving do not receive as much attention, even though they are likely more pertinent and frequently encountered by owners.

One of those problems is with the central windshield Full Self-Driving camera, which sits inside a housing at the top of the glass, enabling Tesla Vision to have an uninterrupted view of the traffic and surroundings ahead of the vehicle.

Many owners have reported that their vehicles alert them when Full Self-Driving is unavailable due to an obstruction with this camera. Commonly, it is caused by a buildup of condensation, which creates a haze on the camera and obstructs its view.

Tesla suggests a quick cleaning of the housing and cameras, which resolves the problem. Still, owners are not necessarily ecstatic about having to do this themselves.

Tesla developing more comprehensive Cybertruck camera cleaning system

Musk says that Tesla is attempting to fix the issue, and said in response to one owner who performed the maintenance that it was a “major area of focus” for the company:

While many were enthusiastic about the potential fix, but some complained that their cars had been in for service many times for the issue, inhibiting their ability to utilize FSD and truly enjoy the full experience of owning a Tesla.

It will likely be a hardware fix that will be implemented through a service appointment, but knowing Tesla, they could have something up their sleeve through a software update to resolve the issue.

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Tesla’s Lead of Optimus AI departs and people are confused about it

Kumar, who has been with Tesla for just over two years, made his announcement on X, revealing he was taking a role at Meta as a Research Scientist.

Published

14 hours ago

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September 19, 2025

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Credit: @heydave7/X

Tesla’s Lead of Optimus AI, Ashish Kumar, is departing the company, and people sure are confused about it.

Kumar, who has been with Tesla for just over two years, made his announcement on X, revealing he was taking a role at Meta as a Research Scientist.

He said:

“Decided to leave Tesla. It’s been an incredible ride leading the Optimus AI team. We went all-in on scalable methods — swapping the classical stack with reinforcement learning & scaling dexterity by learning from videos. AI is the most significant bit to unlock humanoids.”

Tesla fans were baffled by Kumar’s decision, immediately questioning his choice, with many wondering why he’d leave Elon Musk for Mark Zuckerberg.

Some said the choice had to be financially motivated, but Kumar said it was not, and if money were the driving factor, he would have stayed at Tesla:

Others were grateful for Kumar’s contributions to the company and were very respectful regarding his decision:

It’s possible that Kumar chose to leave Tesla for more reasons than one, and financial reasons do not appear to be the issue, as he admitted. However, it could be a better work-life balance at Meta, or perhaps there is an internal project that simply interests him more.

Tesla will be okay, and Optimus will continue to improve with a new Lead in that position. We wish Ashish the best of luck in his new role, and we are thankful for what he contributed to the Optimus program.

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Elon Musk

Elon Musk: Tesla shareholder vote results could “affect the future of the world”

“This shareholder vote decides the future of Tesla and may affect the future of the world,” Musk posted on X.

Published

15 hours ago

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September 19, 2025

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MINISTÉRIO DAS COMUNICAÇÕES, CC BY 2.0 , via Wikimedia Commons

Elon Musk is urging Tesla shareholders to take part in the company’s upcoming annual meeting, calling the vote critical not just for the automaker but potentially for the world. 

“This shareholder vote decides the future of Tesla and may affect the future of the world,” Musk posted on X, emphasizing the importance of proposals that will be voted on in the upcoming meeting on November 6, 2025.

A pivotal inflection point

In a message from its official account, Tesla described itself as being at “a critical inflection point” as it prepares for its annual meeting. Shareholders will soon receive voting instructions, with the company asking investors to back the Board’s recommendations on all proposals. The post also referenced Tesla’s Master Plan Part IV, which outlines ambitious growth targets across vehicles, energy, and artificial intelligence.

“Tesla is at a critical inflection point. We need your vote ahead of our 2025 Annual Meeting on November 6. Tesla shareholders, the owners of our company, will soon receive their control numbers and voting instructions from their brokers. This will enable you to vote. We are asking you to vote with the Board’s recommendations on *all* proposals,” Tesla wrote in its post.

The company also highlighted that it is currently on the brink of a “massive wave of transformational growth.” Tesla stressed that confidence in Musk’s leadership is central to this trajectory, as he is the CEO who could lead Tesla into its new, ambitious era.

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Some Key proposals

Two proposals stand out in Tesla’s recommendations, as per the company’s VoteTesla.com website. The first seeks to amend and restate Elon Musk’s 2019 Equity Incentive Plan, creating a special reserve of nearly 208 million shares to give the board flexibility amid ongoing litigation surrounding Musk’s 2018 CEO Performance Award. It also calls for replenishing the general share reserve with 60 million additional shares, ensuring capacity for employee equity grants.

“Equity is the cornerstone of Tesla’s compensation philosophy. We believe we need a framework that allows us to honor the deal we made with Elon and the extraordinary value he created for Tesla shareholders under the 2018 CEO Performance Award. In addition, it is essential that we maintain sufficient equity reserves and maximum flexibility to attract, retain and motivate talent at Tesla,” Tesla wrote.

The second proposal is a new 2025 CEO Performance Award, a pay-for-performance framework that links Musk’s compensation to reaching ambitious market cap and operational milestones. Under the plan, Musk would earn nothing unless Tesla achieves extraordinary results, potentially creating more than $7 trillion in shareholder value and pushing the company’s valuation to as high as $8.5 trillion. The company also asked shareholders to vote in favor of re-electing three directors: Ira Ehrenpreis, Joe Gebbia, and Kathleen Wilson-Thompson.

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