News
NASA’s SLS Moon rocket almost aces vital prelaunch test on 7th try
Following several incomplete attempts in April, June, August, and September, NASA’s first Space Launch System (SLS) Moon rocket has almost aced a vital prelaunch test on the seventh try.
NASA says that “all objectives were met” during the ten-hour test, which wrapped up around 4:30 pm EDT (20:30 UTC) on Wednesday, September 21st. Despite the rocket running into multiple additional issues, some old and others new, the agency was confident enough in the preliminary results of the wet dress rehearsal (WDR) – deemed a “cryogenic demonstration test” – to reaffirm that it’s still working towards a third launch attempt as early as September 27th.
That launch date is not set in stone, but NASA also hasn’t ruled out the window after the latest round of SLS testing. The agency will host a press conference on Friday, September 23rd, to provide its final decision and offer more details about the seventh wet dress rehearsal.
Despite NASA’s apparent confidence after the test, which was admittedly smoother than most previous SLS tests at the launch pad, it was far from smooth. The immediate story of the “cryogenic demonstration test” dates back to the SLS Artemis I rocket’s second so-called “launch attempt” on September 3rd. During that attempt, the launch was aborted well before SLS was ready when NASA detected a major hydrogen fuel leak around one of the quick-disconnect umbilical panels that fuels and drains the rocket. Remote troubleshooting was unable to solve the problem, forcing NASA to stand down.
Over the last few weeks, teams inspected, tested, and repaired the faulty Tail Service Mast Umbilical (TSMU), preparing for a cryogenic proof test meant to verify that the issue was fixed. During that September 21st test, the TSMU still leaked significantly for the whole duration, but it did so more predictably and – unlike prior leaks – never violated the limits that would trigger a launch abort.
But near the end, a different umbilical panel developed a significant hydrogen leak that did violate those launch constraints, meaning that NASA would have likely had to stand down yet again if it had attempted to launch before completing additional testing. The test was completed successfully, but its goals and constraints were not the same as those facing a launch.
A NASA-developed rocket leaking hydrogen is unfortunately a tale as old as time. That the agency that struggled with hydrogen leaks throughout the 30-year career of the Space Shuttle appears to be just as flabbergasted by nearly identical problems on a new rocket – SLS – that has Shuttle ‘heritage’ on almost every square inch is not surprising, even if it is somewhat embarassing.
Liquid hydrogen fuel always has been and likely always will be a massive pain to manage in any rocket, but especially in a large rocket. As the smallest element in the universe, it is fundamentally leak-prone. Combined with the fact that it only remains liquid below the extraordinarily low temperature of -253°C (-423°F), generates ultra-flammable hydrogen gas as it continually attempts to warm to a more stable temperature, and naturally embrittles most metals, it’s an engineering nightmare by almost every measure.
For all that pain, hydrogen does provide rocket engineers exceptional efficiency when properly exploited, but even that positive aspect is often diminished by hydrogen’s ultra-low density. For rocket stages that have already reached orbit, hydrogen-oxygen propellant offers unbeatable efficiency. But for a rocket stage that will never be used in orbit, like the SLS core stage, hydrogen fuel is rarely worth the tradeoffs – a reality that SLS is unfortunately providing a strong reminder of.
Demonstrating the Groundhog Day-esque nature of NASA rockets and hydrogen leaks, the same leaky TSMU panel that aborted SLS’ September 3rd launch attempt (sixth WDR) and had to be fixed and retested on September 21st also caused a hydrogen leak that partially aborted the rocket’s third wet dress rehearsal attempt in April 2022. NASA then rolled the rocket back to the Vehicle Assembly Building (VAB), where workers spent almost two months inspecting and reworking the fuel TSMU and fixing other issues. During its first test (WDR #4) after rolling back to the pad in June, the same fuel TSMU leaked and NASA had to return the rocket to the VAB again to fix the problem.
The fuel TSMU then leaked on the SLS rocket’s first launch attempt (really WDR #5), but the problem was resolved and was not what caused NASA to stand down. It was, however, a primary reason behind NASA’s second aborted launch attempt (WDR #6). With any luck, the eighth time will be the charm.
News
NHTSA probes 2.9 million Tesla vehicles over reports of FSD traffic violations
The agency said FSD may have “induced vehicle behavior that violated traffic safety laws.”
The U.S. National Highway Traffic Safety Administration (NHTSA) has opened an investigation into nearly 2.9 million Tesla vehicles over potential traffic-safety violations linked to the use of the company’s Full Self-Driving (FSD) system.
The agency said FSD may have “induced vehicle behavior that violated traffic safety laws,” citing reports of Teslas running red lights or traveling in the wrong direction during lane changes.
As per the NHTSA, it has six reports in which a Tesla with FSD engaged “approached an intersection with a red traffic signal, continued to travel into the intersection against the red light and was subsequently involved in a crash with other motor vehicles in the intersection.” Four of these crashes reportedly resulted in one or more major injuries.
The agency also listed 18 complaints and one media report which alleged that a Tesla operating with FSD engaged “failed to remain stopped for the duration of a red traffic signal, failed to stop fully, or failed to accurately detect and display the correct traffic signal state in the vehicle interface.”
Some complainants also alleged that FSD “did not provide warnings of the system’s intended behavior as the vehicle was approaching a red traffic signal,” as noted in a Reuters report.
Tesla has not commented on the investigation, which remains in the preliminary phase. However, any potential recall could prove complicated since the reported incidents likely involved the use of older FSD (Supervised) versions that have already been updated.
Tesla’s recent FSD (Supervised) V14.1 update, which is currently rolling out to drivers, is expected to feature significantly improved lane management, intersection handling, and overall driving accuracy, reducing the chances of similar violations. It should also be noted that Tesla maintains that FSD is a supervised system for now, and thus, is not autonomous yet.
While autonomous systems face scrutiny, NHTSA’s own data highlights a much larger danger on the road from human error. The agency recorded 3,275 deaths in 2023 caused by distracted driving due to activities like texting, talking, or adjusting navigation while operating a vehicle manually. It is also widely believed that a good number of traffic violations are unreported due to their frequency and ubiquity.
News
Tesla quietly files for Model Y+ in China, and its range numbers could be wild
The upcoming variant was listed in the Ministry of Industry and Information Technology’s (MIIT) public catalog.
Tesla has filed for regulatory approval of a new Model Y+ in China, hinting at a long-range update to its best-selling crossover SUV.
The upcoming variant was listed in the Ministry of Industry and Information Technology’s (MIIT) public catalog.
Mirroring Model 3+ Range
Based on the MIIT’s catalog, the Model Y+ will feature a 225 kW/302 horsepower single-motor setup. It will also feature ternary LG Energy Solution batteries, similar to the long-range Model 3+, which was launched earlier this year. The vehicle is expected to offer around 800 kilometers of CLTC range, potentially making it the longest range Model Y in Tesla China’s lineup.
The new Model Y+, identified under model number TSL6480BEVBR0, retains the same five-seat configuration and dimensions as the current Model Y. Though Tesla has not yet confirmed official range figures, industry observers expect it to be quite similar to the Model 3+’s 830-kilometer CLTC performance, as noted in a CNEV Post report.
Intensifying Competition
Tesla’s filing comes amid intensifying domestic competition in China. The U.S. EV maker sold 57,152 vehicles in August, down nearly 10% year-on-year, though up almost 41% from July’s 40,617 units, as noted by data from the China Passenger Car Association (CPCA). Still, the Model Y+ could help Tesla regain traction against strong local players by offering class-leading range and improved efficiency, two factors that have become a trademark of the electric vehicle maker in China.
Tesla’s experience with the Model 3+, which received a RMB 10,000 price cut within a month of launch, suggests that raw range numbers alone may not guarantee stronger sales. With this in mind, the rollout of features such as FSD could prove beneficial in boosting the company’s sales in the country.
One notable investor that many people will recognize said today on X that he does not understand Tesla shorts, otherwise known as $TSLAQ, and he’s giving some interesting reasons.
Martin Shkreli was long known as “Pharmabro.” For years, he was known as the guy who bought the rights to a drug called Daraprim, hiked the prices, and spent a few years in Federal prison for securities fraud and conspiracy.
Shkreli is now an investor who co-founded several hedge funds, including Elea Capital, MSMB Capital Management, and MSMB Healthcare. He is also known for his frank, blunt, and straightforward responses on X.
His LinkedIn currently shows he is the Co-Founder of DL Software Inc.
One of his most recent posts on X criticized those who choose to short Tesla stock, stating he does not understand their perspective. He gave a list of reasons, which I’ll link here, as they’re not necessarily PG. I’ll list a few:
- Fundamentals always have and will always matter
- TSLAQ was beaten by Tesla because it’s “a great company with great management,” and they made a mistake “by betting against Elon.”
- When Shkreli shorts stocks, he is “shorting FRAUDS and pipe dreams”
After Shkreli continued to question the idea behind shorting Tesla, he continued as he pondered the mentality behind those who choose to bet against the stock:
“I don’t understand ‘TSLAQ.’ Guy is the richest man in the world. He won. It’s over. He’s more successful with his 2nd, 3rd, and 4th largest companies than you will ever be, x100.
You can admit you are wrong, it’s just a feeling which will dissipate with time, trust me.”
i dont understand “$TSLAQ”. guy is the richest man in the world. he won. it’s over. he’s more successful with his 2nd, 3rd and 4th largest companies than you will ever be, x100.
you can admit you are wrong, it’s just a feeling which will dissipate with time, trust me. https://t.co/dkqrISCldp
— Martin Shkreli (@MartinShkreli) October 8, 2025
According to reports from both Fortune and Business Insider, Tesla short sellers have lost a cumulative $64.5 billion since Tesla’s IPO in 2010.
Shorts did accumulate a temporary profit of $16.2 billion earlier this year.
NHTSA probes 2.9 million Tesla vehicles over reports of FSD traffic violations
Tesla quietly files for Model Y+ in China, and its range numbers could be wild
‘I don’t understand TSLAQ:’ notable investor backs Tesla, Elon Musk
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