After rapidly stacking Ship 20 and Booster 4 the evening prior, SpaceX appears to have begun testing a fully stacked Starship rocket for the first time ever.
Though the test SpaceX subjected Starship to was by no means ambitious and in spite of the fact that it no longer appears that Ship 20 and Booster 4 will ever fly, the first test of the first fully integrated prototype of a new rocket is still an immensely significant achievement – particularly so for the largest rocket ever built.
Standing around 119 meters (~390 ft) tall, Starship is unequivocally the largest and most voluminous rocket ever built. With its 29 Raptor V1 engines, the fully assembled Ship 20 and Booster 4 (B4) stack would have likely weighed around 4000-5000 tons (9-11M lb) and been able to produce around 5400 tons (11.9M lbf) of thrust at liftoff – substantially heavier and more powerful than Saturn V or N1, the largest rockets ever successfully and unsuccessfully launched.
For its first fully-integrated test, though, SpaceX appears to have put Starship through a fairly limited cryogenic proof – a test where flammable propellant is replaced with a similarly cold (cryogenic) fluid that’s similar enough to subject a rocket to similar thermal and mechanical stresses. For Ship 20 and Booster 4’s combined debut, Super Heavy was filled maybe 10-20% and Starship around 25-50% of the way with either liquid nitrogen (LN2) or a combination of LN2 and liquid oxygen (LOx). It’s difficult to tell but it’s unlikely any methane (LCH4) fuel was involved.
Back on the ground, Starship S20 completed five separate cryogenic proof tests before its first test on top of Super Heavy. More importantly, Ship 20 successfully completed several static fire tests, each of which also functioned as a wet dress rehearsal with LCH4/LOx propellant. Booster 4 had also passed several cryogenic proof tests. In that sense, it’s unlikely that SpaceX had a great deal of uncertainty as to whether either prototype would be able to complete yet another test.
Beyond the basic mechanical demonstration that Super Heavy Booster 4 is strong enough to support a partially loaded Starship, which probably wasn’t in doubt, it’s likely that the main purpose of this first full-stack cryoproof was to ensure that all the systems required to fuel Starship on top of Super Heavy were working as expected. That’s no small feat given that Starship is both the tallest rocket and largest upper stage ever assembled. To fully fuel a Starship for an orbital launch, around 1200 tons (~2.65M lb) of propellant (or LN2 for a cryoproof) – equivalent to the weight of more than two entire Falcon 9 rockets – must be pumped around 85 meters (~275 ft) up Starbase’s integration tower.
That requires thousands of feet of plumbing and a symphony of giant valves and pumps, all of which must work in concert – without leaking, jamming, or freezing – to fuel Starship. As such, the first full-stack cryoproof was just as much – or more – of a test of the orbital launch site’s launch/integration tower and tank farm. That first test is just the start of a long process, though, and it’s likely that SpaceX will attempt an increasingly ambitious series of tests with Booster 4 and Ship 20 over the next week or two.
That could involve simply filling the rocket further and raising its tank pressures or it could potentially culminate in a partial wet dress rehearsal with methane and oxygen propellant in place of liquid nitrogen. There’s an even smaller chance that SpaceX could attempt to static fire Super Heavy B4 for the first time, although sources like NASASpaceflight are no longer confident that Booster 4 will be static fired before retirement. More to the point, it would be uncharacteristically risky behavior from SpaceX to perform the very first static fire of a new prototype with an already proven Starship sitting on top of it. An anomaly as small as an uncontrolled fire – far from uncommon for Starships – could easily risk the catastrophic destruction of both stages, which would itself run the risk of significantly damaging the orbital launch site, which could easily take months to repair.
Nonetheless, there’s still a chance. SpaceX has opportunities for additional testing on March 17th, 18th, 21st, and 22nd.
Elon Musk
Neuralink’s first patient could receive an upgrade: Elon Musk
Musk stated that Arbaugh could also be the first Neuralink patient to receive an upgrade.
Neuralink’s first human patient might be in line for a very interesting development in the future.
Based on recent comments from Elon Musk, Neuralink seems to be considering an “upgrade” for its first human patient, allowing him to perform even more sophisticated tasks using only his mind.
Elon Musk’s recent comments
Musk’s update came as a reply to an X post that featured some details about the current activities of Noland Arbaugh, the first person in the world to receive a Neuralink implant. Since receiving his implant, Arbaugh has been able to take back his life, and he now games, attends class, and even works as a paid speaker.
In his response, Musk stated that Arbaugh could also be the first Neuralink patient to receive an upgrade. “Noland might be the first to receive a Neuralink upgrade and/or dual Neuralink implant to further augment his abilities. It won’t be long before a Neuralink recipient can beat most and eventually all humans at fast reaction video games,” Musk wrote in a post on X.
Noland’s recent update
Noland actually provided a quick update about his life with his Neuralink implant, which he fondly named Eve, on X. He noted that his direct involvement with Neuralink has lessened as more participants have joined the company’s human trials. And despite a recent pressure sore setback, he remains optimistic and teased “big news” coming for his two-year update in early 2026.
Beyond his recovery, Arbaugh stated that Neuralink has made everyday goals achievable again. He is currently studying neuroscience, taking chemistry, biology, and pre-calculus and maintaining good grades, something he said would have been impossible without Neuralink.
News
Tesla Cybercab almost looks production ready in new photos
Tesla’s AI team recently posted an image of the Cybercab going Animal Style at an In-and-Out drive-through.
Tesla’s AI team recently posted an image of the Cybercab going Animal Style at an In-and-Out drive-through. But while the Cybercab’s passengers were quite funny, the photos themselves suggest that some of the Cybercab’s components may already be production-ready.
Cybercab goes Animal Style
Seemingly as a fun Halloween post, the Tesla AI team shared a photo of a Cybercab, complete with passengers who were in costume, at an In-and-Out drive through. Based on the photos that were shared on X, it appeared that the Cybrcab was being accompanied by a Tesla Model Y Premium. The Tesla AI team shared a lighthearted caption to the image, writing “Animal Style,” a reference to a popular secret menu item for the fast food chain.
In a way, the Tesla AI team’s Halloween post was a lighthearted reference to the popularity of In-and-Out among Tesla owners. This is partly because of the Tesla Supercharger network, which has numerous locations that are close to In-and-Out sites. Elon Musk has also jokingly confirmed in the past that driving prototype Teslas through an In-and-Out is a tradition and a fun milestone marker.
Apparent production-ready Cybercab sections
While the Tesla AI team’s photos provided some lighthearted fun to the EV community, some industry watchers pointed out that the Cybercab in the photos looked production ready, or at least some parts of it seem to be. This is especially noticeable in the Cybercab’s front end, which looks very refined and well-built.
The front end of the Cybercab on the In-and-Out photo even had a license plate mount, and previous sightings revealed that the door of the vehicle had been updated since it was unveiled last year.
With this in mind, speculations are abounding that the Cybercab might indeed be ready for initial production soon. The installation of production equipment in Giga Texas has been ongoing for several months now, and tests of the Cybercab in both the Giga Texas complex and on public roads have also ramped.
Investor's Corner
Michael Dell points out practical advantage of Elon Musk’s proposed pay package
As pointed out by the Dell Technologies CEO, Musk will only be rewarded if he delivers extraordinary value to shareholders
Michael Dell has weighed in on Elon Musk’s controversial 2025 CEO Performance Award, offering a grounded perspective amidst the noise surrounding the pay package today.
As pointed out by the Dell Technologies CEO, Musk will only be rewarded if he delivers extraordinary value to shareholders. Musk would quite literally receive no compensation if he fails to achieve his targets.
Dell emphasizes results over rhetoric
Dell shared his thoughts about Musk’s 2025 CEO Performance Award in a post on X.“Vote FOR Elon Musk. The award is only achieved IF he hits exceptionally ambitious market-cap and operational milestones—if he falls short, he gets nothing,” Dell wrote in his post.
“If he succeeds, shareholders will win big through unprecedented value creation, and he will earn added voting rights to continue driving Tesla’s long-term vision.”
Musk replied with a short “Thanks Michael,” acknowledging Dell’s support. Dell’s framing cuts through the debate surrounding Musk’s compensation, as he simply focused on the incentive structure’s risk-reward balance.
Musk’s ambitious pay package
Elon Musk’s 2025 CEO Performance Award requires Tesla’s market capitalization to rise from roughly $1.1 trillion today to $8.5 trillion within a decade. This would make Tesla more valuable than any company in history.
Apart from this, Tesla’s operating profit must also grow from $17 billion to $400 billion annually. Musk must also lead the company to several product-related milestones, such as 20 million cumulative vehicle deliveries, 10 million Full Self-Driving subscriptions, 1 million Tesla Bots, and 1 million operating Robotaxis.
So far, proxy advisors Glass Lewis and ISS have urged shareholders to vote against the plan. Some prominent investors, including ARK Invest CEO Cathie Wood, however, have voiced strong support for the plan. Wood called Musk “the most productive human being on earth,” arguing that his vision and ability to attract talent are central to Tesla’s success.
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