News
SpaceX’s recent Starship testing challenges don’t worry Elon Musk
In his latest burst of tweets, SpaceX CEO Elon Musk says he isn’t all that worried about a duo of recent Starship prototype failures and talked next steps for the next few Starships.
Aside from SpaceX’s South Texas rocket factory, Musk also touched on progress being made on the cutting-edge Raptor engine set to power Starships and their boosters, revealing a small production milestone in the process. The CEO says that SpaceX has already begun building its 26th Raptor engine, a sign that Raptors may actually be waiting on Starships in a turn of events. Back when SpaceX was busy testing its low-fidelity Starhopper testbed, the ship actually had to wait several months for the full-scale Raptor engine’s design to mature enough to support 15-30+ second hop tests.
Now, Musk’s Raptor SN26 reveal implies that SpaceX is slowly but surely ramping up production of the new engine back at its Hawthorne, California headquarters.
From August to December 2019, SpaceX completed one Raptor engine every ~17 days, on average. With Musk’s confirmation that SpaceX is currently building (or already testing) SN26, the company is completing an engine every 12-14 days – an overall improvement of 20-40%. In other words, SpaceX’s growing engine production capacity is almost perfectly positioned to support a fleet of suborbital Starship prototypes, which is about where the company’s Boca Chica, Texas factory is today.
Obviously, following two recent full-scale Starship prototype failures spaced barely a month apart, rocket production has a ways to go before it will need the volume of Raptor engines SpaceX appears to already be capable of producing. For the time being, three Raptor engines – having already completed production in Hawthorne and acceptance testing in McGregor, Texas – are quite literally sitting around and gathering dust as they wait for the first Starship prototype qualified to host them.
Once a Starship passes proof testing, SpaceX will be able to install either one or all three engines for an inaugural static fire test, following by a small Starhopper-class hop (no higher than 150m or 500 ft).
However, once SpaceX has explored the full range of testing available to suborbital Starship prototypes, things will change. Likely ending with the first one or several successful ‘skydiver-style’ rocket landing tests, SpaceX will finally be able to seriously think about its first orbital flight tests. To reach orbit and still be capable of returning to Earth and landing softly, Starship will need a Super Heavy booster – set to be the largest rocket booster ever developed by a large margin.
Although Musk has stated that early orbital flight tests will likely launch with far fewer engines, a single Super Heavy booster could eventually require 37 Raptor engines – a full 42% more engines than SpaceX has managed to build in the entire 15+ month history of full-scale Raptor production.
Thankfully, SpaceX’s engine production HQ likely has at least 6-12 months to ramp up production to support fully-outfitted Super Heavy boosters – let alone several. For the time being, each suborbital Starship only needs 3 sea level-optimized Raptor engines, although it’s possible that SpaceX will eventually perform suborbital tests with a full compliment of six engines – including three with much larger vacuum-optimized nozzles.
Ultimately, Musk explained that his lack of concern about recent Starship prototype failures – potentially including any anomalies that follow SN4’s test campaign – comes from the fact that he believes that producing Starships is a much more challenging and pressing concern. Indeed, if your factory can churn out functioning building-sized spacecraft for pennies on the dollar, losing a few during testing is little more than an annoyance. The first failed prototypes can thus be considered learning experiences, helping SpaceX improve designs and optimize the factory and production strategies. SpaceX does still need to prove that its existing approach really can build functioning rockets, but that should (in theory) come with enough trial and error.
Depending on how initial tests go with Starship Serial Number 4 (SN4), likely days away from wrapping up production, Musk says that the first few suborbital Starship tests will likely involve short, low-velocity hops. Those flights will be slow enough that the ship (or ships) wont require aerodynamic control surfaces to complete them, instead relying entirely on smaller thrusters and the thrust vector control (TVC) provided by their three main Raptor engines.
If Starship SN4 testing – including wet dress rehearsals, Raptor static fires, and short hops – goes perfectly, Musk says that Starship SN5 could be the first new ship to have fully-functional flaps installed. If things don’t go quite as well, that milestone could shift to Starship SN6, while SN7 and beyond are obviously on the table in the event of even less forgiving SN4/SN5 testing scenarios. For now, Starship SN4 could be ready to move to the launch pad and kick off a series of critical proof tests a handful of days from now.
News
Tesla Robotaxi’s biggest challenge seems to be this one thing
That big bright thing in the sky might be Tesla’s biggest challenge in terms of Robotaxi.
Tesla Robotaxi launched just a few days ago to a limited number of riders in Austin, Texas, but its biggest challenge seems to be how the automaker will figure out one thing: the Sun.
Among the company’s unique strategies, its emphasis on using cameras for self-driving is perhaps the most interesting. No other company has adopted the same strategy, as others have relied on cameras with either sensors or LiDAR rigs to accomplish their self-driving deployments.
Tesla, on the other hand, has called LiDAR unnecessary. CEO Elon Musk once called it “a fool’s errand,” stating it was not needed to build an effective self-driving fleet of vehicles.
Musk compared cameras to eyes. Humans don’t need sensors or LiDAR to operate vehicles on the road, so why should cars? This brought up some questions, especially regarding sun glare. Musk said that Tesla would use direct photon counting to see directly into brigt sunlight or even in the darkest conditions at night.
His quote during a recent earnings call was:
“Actually, it does not blind the camera. We use an approach which is direct photon count. When you see a processed image, so the image that goes from the sort of photon counter — the silicon photon counter — that then goes through a digital signal processor or image signal processor, that’s normally what happens. And then the image that you see looks all washed out, because if you point the camera at the sun, the post-processing of the photon counting washes things out.”
So far, this strategy has yielded mixed results. We have seen examples of both:
The Good
We’ve had a handful of people state that they have had no issue using the Robotaxi when it is driving into direct sunlight.
There are plenty of examples:
Robotaxi seems to have no trouble driving into the sun. More to come pic.twitter.com/rZdd3Sya8k
— Dirty Tesla (@DirtyTesLa) June 25, 2025
Tons of direct sun glare during many of my Tesla Robotaxi rides today in Austin. The vehicles handled it with no problem. pic.twitter.com/3kyiQF4RMs
— Sawyer Merritt (@SawyerMerritt) June 24, 2025
Absolutely ZERO issues heading into direct sunlight in our Robotaxi, been going for almost an hour now during golden hour/sunset. As smooth as it always is. pic.twitter.com/iSCp6qdNC0
— Zack (@BLKMDL3) June 25, 2025
The Bad
🚗 Day 1 of Robotaxi testing with 20 initial riders! Caught a rare phantom braking moment on camera during our Waymo vs. Tesla Robotaxi race. 🤖 It’s a one-off glitch in Full Self-Driving mode—most rides were smooth! Drop your thoughts! 👀 pic.twitter.com/liJGSIIHKw
— Kim Java (@ItsKimJava) June 24, 2025
The Verdict
This is obviously a weird case, and it seems that this could be one of the challenges Tesla will face with the deployment of Robotaxi.
While it will get figured out, this is something that could ultimately push back Tesla’s goal of having no safety monitor in the vehicles. However, the instance will be learned and used to improve in the future through its Neural Nets.
The first intervention was captured yesterday, requiring the Tesla safety monitor to stop the vehicle manually on the car’s touchscreen.
News
Tesla owners take stand as Stockholm insists on blocking FSD tests
Despite the Tesla owners’ efforts, city officials appear unwilling to budge.
Tesla owners in Sweden are taking it upon themselves to lobby for the approval of FSD-style tests in the City of Stockholm. The owners’ efforts come amidst city officials’ continued refusal to allow Tesla to test its autonomous driving system in the capital.
In open letters and social media posts, Tesla owners have urged Stockholm to reconsider its stance, pointing to broader support for FSD trials across Europe. But despite their efforts, city officials appear unwilling to budge, reinforcing the capital’s hardline stance on the Elon Musk-led EV maker.
Public support shows brand loyalty
A group of Swedish Tesla owners recently sent an open letter to Stockholm leaders. Among them is Alexander Kristensen, who has written a letter to officials urging them to allow Tesla to test FSD in the region.
“Members of the Traffic Committee are politically appointed by the Stockholm City Council, whose mandate is determined by the popular vote. Your stance—continuing to block a conditional pilot of FSD— is thus a political decision and fully subject to the electorate’s judgment in the next municipal election.
“When the City prevents tests that could validate and refine the technology locally, it is perceived as hampering life-saving innovation,” the Tesla owners wrote.
The Swedish Transport Administration issued a response, acknowledging the Tesla owners’ feedback. The Transport Administration noted that it could proceed to grant a permit for Tesla to test FSD, but the company would still have to secure approval from local governments where the FSD-style tests will be conducted.
Stockholm remains firm
Despite this, Stockholm doubled down shortly after, stating that Tesla’s FSD software remains prohibited on city roads.
“Thank you for your comments and for taking an interest in traffic issues concerning the City of Stockholm. As previously stated, the City’s assessment of the current application remains unchanged and our position is set out in the opinion,” the City of Stockhom wrote.
In light of the city’s response, some Tesla owners have vowed to campaign against current officials in the next election.
The push for FSD testing comes as Tesla faces ongoing challenges in Sweden, including a labor dispute with unions over collective bargaining agreements. Since late 2023, the conflict has resulted in strikes, blockades, and legal battles, none of which appear close to resolution. Despite regulatory and labor headwinds, Tesla continues to expand in the region, including the recent installation of Superchargers in union-backed areas.
Elon Musk
xAI welcomes Memphis pollution results, environmental groups push back
Tests were conducted at Macedonia Church in Boxtown, The Links at Whitehaven, and City Hall Downtown.
The City of Memphis has released initial air quality test results from three sites across the city, including one near Elon Musk’s xAI data center in South Memphis.
According to city officials, the results showed no dangerous levels of pollutants. “At every site and for every pollutant tested, levels were either too low to detect or well below established safety thresholds,” the city’s report read.
xAI Welcomes Air Quality Test Results
Tests were conducted at Macedonia Church in Boxtown, The Links at Whitehaven, and City Hall Downtown. Memphis Mayor Paul Young stated that the data only represents a “snapshot in time” and that continued monitoring will take place.
“The City doesn’t control air quality regulations, but we stepped up to find answers. The initial results showed no dangerous levels of air pollutants at any of the tested sites. We are committed to ongoing testing to continue to inform and protect our community,” Mayor Young stated.
xAI, which opened a facility in Boxtown to house its Colossus supercomputer, welcomed the city’s initial findings. The artificial intelligence startup shared its comments in a post on social media platform X.
“xAI welcomes the independent third-party data showing no dangerous pollutant levels at test sites near our Memphis data center. We have built a world-class data center in Memphis and we couldn’t have done it without the support of the local community and its leaders,” the company stated.
Critics Are Not Satisfied
Environmental advocates and local leaders, however, were not satisfied with the city’s initial tests. The Southern Environmental Law Center criticized the city’s approach, arguing that smog-forming emissions, including nitrogen oxides from xAI’s turbines, pose health risks that the city’s testing did not account for, as noted in a FOX 13 Memphis report.
“The city failed to measure ozone pollution–better known as smog–which we already know is a major problem in the Memphis area… As community members have warned for the last year, smog-forming pollution is a major concern with the unpermitted turbines being run at xAI’s South Memphis data center,” the group noted.
State Representative Justin J. Pearson (D-Memphis) echoed the group’s criticism.
“We do not need any more misleading reports that are more concerned with finding a conclusion conducive to Mayor Young’s unwavering support of xAI, rather than discovering the truth. Our review of the information released by the City of Memphis earlier this evening revealed a glaring and critical omission in their pollution testing and results: the monitoring of ozone which is a considerable factor in air pollution problems in Memphis,” he noted.
-
Elon Musk2 weeks agoTesla sues former Optimus engineer for stealing trade secrets
-
News2 weeks agoSpaceX produces its 10 millionth Starlink kit
-
News2 weeks agoTesla Robotaxi just got a big benefit from the U.S. government
-
News2 weeks agoTesla launches new Model S and Model X, and the changes are slim
-
News1 week agoTesla confirms massive hardware change for autonomy improvement
-
News2 weeks agoTesla retires yoke steering wheel in base Model S and X
-
News2 weeks agoTesla launches “TeslaVision” video contest to celebrate Model Y deliveries
-
Elon Musk2 weeks agoTesla Full Self-Driving’s European launch frustrations revealed by Elon Musk