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SpaceX Starship pop test opens the door for 60,000 foot hop [update]
SpaceX has successfully destroyed a Starship ‘test tank’ for the fourth time, opening the door for the first high-altitude prototype to roll to the launch pad as soon as tomorrow.
The culmination of three nights and more than 20 hours of concerted effort, SpaceX was finally able to fill Starship test tank SN7.1 with several hundred tons of liquid nitrogen before dawn on September 23rd. With just an hour left in the day’s test window, SpaceX closed the tank’s vents, allowing its cryogenic contents to boil into gas and expand with no outlet. At 4:57 am CDT, SN7.1 burst, bringing its lengthy test campaign to a decisive end.
A handful of hours later, new road closure notices revealed SpaceX’s plan to roll Starship SN8 – the first full-size prototype and first ship meant for high-altitude testing – from its Boca Chica factory to the launch site.
Update: All road closures planned for Starship SN8’s roll to the launch pad (Sept 24) and first test campaign (Sept 27-29) have been canceled. Stay tuned for updates on the high-altitude prototype’s test schedule.
Short of new information from SpaceX or CEO Elon Musk, little is known about the results of SN7.1’s lengthy test campaign, but the fact that it survived two nights of nondestructive testing – including the use of hydraulic rams to simulate Raptor thrust – effectively clears Starship SN8 for suborbital testing. Based on a speculative, amateur analysis of the aftermath of SN7.1’s burst test, it can also be tentatively concluded that the tank failed almost exactly where one would expect it to: the in-situ weld attaching the upper tank dome to SN7.1’s steel ring hull.
SN7.1’s forward dome appears to have cleanly sheared off around much of its circumferential weld joint – exactly what one would theoretically expect from a good, uniform weld. Assuming that SN7.1 reached pressures well above 8.5 bar (~125 psi) before it burst, the tank’s final test can likely be deemed a success.
The very same day SpaceX kicked off what would become Starship SN7.1’s last burst test attempt, teams worked to install functional flaps on a full-scale Starship prototype (SN8) for the first time ever. Effectively answering the question of whether SpaceX would fully outfit the ship with a nosecone and flaps before its first acceptance tests, SN7.1’s successful pop was followed by road closure notices for SN8’s transport to the launch pad around dawn on September 24th and cryptic “SN8 Testing” as early as September 27th.
As of September 23rd, SN8’s twin aft flaps – large aerodynamic control surfaces meant to stabilize free-falling Starships – have been fully installed alongside ‘aerocovers’ that will protect each flap’s control mechanisms. The only hardware Starship SN8 is missing is a ~20m (~60 ft) tall nosecone, two smaller forward flaps, and the plumbing needed to access a smaller liquid oxygen “header” tank located in the tip of said nose.
At the moment, SpaceX has installed one Starship nosecone prototype atop five unpressurized rings – creating a full nosecone stack. That particular prototype has no liquid oxygen header tank, however, meaning that SpaceX would likely need at least a day or two to weld one of the noses with a header tank atop one of several finished five-ring sections. In other words, to transport SN8 to the pad tomorrow, there’s almost no chance that SpaceX will have time to finish and install a proper nosecone on the prototype, meaning that the company has chosen to test the Starship before that milestone.
Doing so should reduce any inconvenience caused by vehicle failure in the event that Starship SN8’s acceptance test campaign doesn’t go as planned. In hindsight, the inclusion of Starship SN8’s aft flaps and aerocovers during the ship’s first major tests was likely a necessity, given that almost half of each flap and its support structure is installed directly to the skin of its liquid oxygen tank. Theoretically, when chilled to the temperature of liquid nitrogen or oxygen, the diameter of the stainless steel rings Starship SN8 is built out of could shrink by as much as 0.3% (~20 mm or ~0.8 in).
Only half of Starship SN8’s aft flaps will be directly subject to that tank contraction, resulting in a relatively complex environment for such a large, high-stress mechanical system. As such, testing flap actuation under cryogenic loads is likely a critical part of SN8’s cryogenic proof test, otherwise meant to demonstrate the structural integrity and functionality of Starship’s propellant tanks. If SN8 rolls to SpaceX’s launch facilities on schedule, the Starship’s first cryogenic proof test could begin as early as 9pm CDT (UTC-5) on Sunday, September 27th.
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Tesla is releasing a modified version of the Full Self-Driving (Supervised) version 14 suite for Hardware 3 owners, the company announced during the Q3 Earnings Call earlier this week.
Perhaps one of the most pertinent issues for Tesla owners right now is that those owners who have purchased vehicles before 2024 have been stuck with an older version of the company’s self-driving chip, known as Hardware 3 or AI3.
Owners with Hardware 3 vehicles have been stuck in a strange limbo for some time, wondering whether they should wait for the company’s official plans to upgrade them to the newer AI4 or even the to-be-released AI5 chip, or if they should purchase a new vehicle altogether. The upgrade would give them access to the latest Full Self-Driving suite releases, but it would likely cost a good bit of money.
For a while, these owners have been waiting for Tesla to give some sort of update on its plans, as the company has, in a way, danced around the issue by stating it would “take care” of those owners. The problem is, the definition of “take care” is subjective, and nobody knows if that means an upgrade or a free Tesla t-shirt.
Nevertheless, many owners finally got a tad bit more color earlier this week during the Earnings Call, when company executives finally outlined the beginning of a concrete plan to “take care” of HW3 vehicles.
Chief Financial Officer Vaibhav Taneja gave the first bit of the answer, as it is a personal issue to him. He also said that the vehicle he drives is a HW3 car, so it is impacted by the lack of upgrades.
He said:
“We have not completely given up on HW3. These customers are very important. They are early adopters. We will definitely take care of you guys.”
However, Tesla’s Head of AI, Ashok Elluswamy, gave some additional color, revealing that Tesla plans to launch v14 Lite for HW3 cars, and it will be released in Q2 of next year, tentatively:
“Once the v14 release series is fully done, we are planning on working on a v14 Lite version for hardware three. Probably expected in Q2 next year.”
This is somewhat of an answer, but some owners have already voiced discontent with this solution because HW3 will more than likely not be capable of what will be the “feature complete” version of FSD.
Elon Musk
Jim Cramer chimes in on Tesla CEO Elon Musk’s pay package
“Don’t be small-minded: Tesla is about robots, Full Self-Driving, the future. Give him his package.”
Investor and host of Mad Money on MSNBC , Jim Cramer, has chimed in on Tesla CEO Elon Musk’s pay package and whether it should be rewarded to the frontman or not.
Cramer has drawn a lot of attention regarding his sentiments on Tesla, as investors have routinely given him a pretty hard time over what he’s said about the company.
For the past few years, we have covered his comments on Tesla when he has something to say, mostly because his opinion on the stock seems to change pretty frequently; at a minimum, he has something different to say about it every few months.
However, Cramer knows Musk’s value to Tesla, and said on Thursday that he believes the CEO deserves his pay package:
“Don’t be small-minded: Tesla is about robots, Full Self-Driving, the future. Give him his package.”
Don’t be small-minded: tesla is about robots, full self driving, the future. Give him his package
— Jim Cramer (@jimcramer) October 23, 2025
Cramer’s comments come just one day after Tesla’s Q3 2025 Earnings Call, where Musk took several opportunities to call out the importance of the pay package and how it could impact the company’s future — with or without him.
Musk said at one point that he would not feel comfortable continuing to develop the company’s massive fleet of Optimus bots without having appropriate control of the company from a voting perspective.
He said he does not want so much power that if he “were to lose his mind,” he could not be removed. However, he does feel he needs to be protected from “activist shareholders,” or “corporate terrorists” like proxy groups Institutional Shareholder Services (ISS) and Glass Lewis:
“My fundamental concern with regard to how much voting control I have at Tesla is if I go ahead and build this enormous robot army, can I just be ousted at some point in the future? …It’s just, if we build this robot army, do I have at least a strong influence over that robot army, not current control, but a strong influence? That’s what it comes down to in a nutshell. I don’t feel comfortable wielding that robot army if I don’t have at least a strong influence.”
At the end of the call, Musk said:
“Like I said, I just don’t feel comfortable building a robot army here and then being ousted because of some asinine recommendations from ISS and Glass Lewis, who have no freaking clue. I mean, those guys are corporate terrorists.”
Cramer is one of many who realize Musk’s importance to Tesla, and how the company would likely lack the guidance and prowess it does without his planning and drive. However, Tesla shareholders will have the ultimate say on November 6 when they vote on Musk’s compensation plan.
Tesla has been stumped on how to engineer one crucial part of the Optimus bot, but CEO Elon Musk says the company is “on the cusp” of achieving something great with the project.
During the Q3 2025 Earnings Call, Tesla CEO Elon Musk revealed the company is moving closer to a major breakthrough with the Optimus project, and said they are “on the cusp of something really tremendous.”
However, it seems there is one specific portion of the robot that has truly stumped engineers at the company: the hand, fingers, and forearm.
Musk went into great detail about how incredibly complex and amazing the human hand is, highlighting its dexterity and capability, as its ability to perform a wide variety of tasks is especially impressive:
“I don’t want to downplay the difficulty, but it’s an incredibly difficult thing, especially to create a hand that is as dexterous and capable as the human hand, which is incredible. The human hand is an incredible thing. The more you study the human hand, the more incredible you realize it is, and why you need four fingers and a thumb, why the fingers have certain degrees of freedom, why the various muscles are of different strengths, and fingers are of different lengths. It turns out that those are all there for a reason.”
It’s been pretty apparent that Tesla has made massive strides in the Optimus project, especially considering it has been able to walk down hills, learn things like Kung Fu, and even perform service tasks like serving food and drinks.
However, a recent look at a Gen 2.5 version of Optimus posted by Marc Benioff, the CEO of Salesforce, showed that Tesla was likely using mannequin hands until it developed something that was both useful and aesthetically pleasing:
Very likely that these are non-functional to not give away any major details about next-gen Optimus
The hands are amongst the most complex and important parts of the entire project https://t.co/YgoeNjamvI
— TESLARATI (@Teslarati) September 3, 2025
Musk continued on the call last night that the Tesla team was confronted with an “incredibly difficult” challenge from an engineering perspective, and the hands and actuators for that specific part were tough to figure out:
“Making the hand and forearm, because most of the actuators, just like the human hand, the muscles that control your hand are actually primarily in your forearm. The Optimus hand and forearm is an incredibly difficult engineering challenge. I’d say it’s more difficult than the rest of the robot from an electromechanical standpoint. The forearm and hand are more difficult than the entire rest of the robot. But really, in order to have a useful generalized robot, you do need an incredible hand.”
The CEO continued that developing a useful and effective robot was “crucial to the future of the company,” and that he works with Optimus’s design team each Friday night.
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Jim Cramer chimes in on Tesla CEO Elon Musk’s pay package
Tesla is stumped on how to engineer this Optimus part, but they’re close
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