

News
SpaceX CEO Elon Musk posts uncut Raptor, drone videos of Starhopper’s flight test debut
Some two hours after Starhopper’s inaugural untethered flight, SpaceX CEO Elon Musk took to Twitter to post an uncut video showing the ungainly rocket’s launch and landing from the perspective of both a drone and Starhopper’s lone Raptor engine.
As noted by commenters, Starhopper’s first flight also marks perhaps an even more fascinating milestone: it’s technically the first launch ever of a full-flow staged-combustion (FFSC) rocket engine. Whether or not the development hell Raptor required is or was worth it to SpaceX, the company has become the first and only entity on Earth to develop and fly a FFSC engine, beating out the national space agencies of both the United States and Soviet Union, both of which built – but never flew – prototypes.
Instead of inexplicably shelving a mature prototype development and test program, SpaceX iterated through several subscale Raptor prototypes, test-fired the engines for more than 1200 seconds total, used that data to design and build full-scale Raptors, and finally sped into a hardware-rich test campaign with six (soon to be seven) new engines. After SpaceX settled on a full-flow staged-combustion cycle and methane/oxygen (methalox) propellant, Raptor conducted its first full-scale tests all the way back in 2014, performing preburner flow and ignition tests at NASA’s Stennis Space Center.
Two years and many additional subcomponent tests later, SpaceX successfully performed the inaugural static fire test of its first completed subscale Raptor, a huge milestone for any rocket engine. In the 12 months following its first static fire (September 2016), SpaceX performed dozens of static fire tests with several subscale engines, putting the new propulsion system through >1200 seconds of combined testing.
A year after that, SpaceX was still testing subscale engines but the first full-scale Raptor engine was just a few months away from completing assembly in Hawthorne and heading to McGregor to kick off full-scale static fire testing. Indeed, four months after CEO Elon Musk’s September 2018 update, Raptor serial number 01 (SN01) shipped to Texas in late January and successfully ignited for the first time on February 3rd. SpaceX’s finalized full-scale Raptor engine is designed to produce more than 2000 kN (450,000 lbf, 200 tons) of thrust at full-throttle.
Since that inaugural ignition, SpaceX’s propulsion team – perhaps to their detriment, under orders from Musk – pushed SN01 and several of its successors to their limits as quickly as possible, resulting in severe, irreparable damage in several cases. On the other hand, the no-holds-barred, ‘hardware-rich’ (i.e. destructive) test program has allowed SpaceX to relatively quickly solve several major bugs that prevented the engine from passing longer test fires.
Raptor SN05 was originally expected to support Starhopper’s first flight(s) but had to be passed up after suffering damage in one of its final June 2019 acceptance tests. Raptor SN06 became the first engine – likely thanks to tweaks afforded by data gathered from its failed brethren – to pass all of those acceptance tests, leading to its eventual installation on Starhopper in early July.
Raptor’s impressive development culminated on July 25th with the engine’s first untethered flight while attached to Starhopper, a 9m-diameter (30 ft) low-fidelity prototype that is more or less a mobile test stand for the next-generation SpaceX engine. Raptor is now the only FFSC engine in history that has powered a flight-capable vehicle’s launch and landing, even if said flight featured an apogee of just 20-30 meters (65-100 ft).
“In full-flow staged combustion (FFSC), even more complexity is added as all propellant that touches the engine must necessarily end up traveling through the main combustion chamber to eke every last ounce of thrust out of the finite propellant a rocket lifts off with. As such, FFSC engines can be about as efficient as the laws of physics allow any given chemical rocket engine to be, at the cost of exceptional complexity and brutally difficult development.“
SpaceX delays Starhopper’s first flight a few days despite Raptor preburner test success
For more on what exactly makes full-flow staged-combustion engines uniquely capable and challenging to develop, the subject has been covered at length in past Teslarati articles.
According to Musk, the next major challenge facing Starhopper and (presumably) Raptor SN06 is far more ambitious 200-meter (650 ft) hop and flight test that could happen as soon as the first half of August.
Check out Teslarati’s Marketplace! We offer Tesla accessories, including for the Tesla Cybertruck and Tesla Model 3.
News
Tesla gets new information request from NHTSA on Robotaxi rollout
Tesla has been contacted by the NHTSA regarding plans for the Robotaxi rollout and how it will handle poor weather.

Tesla has been contacted by the National Highway Traffic Safety Administration (NHTSA) regarding its planned rollout of a Robotaxi platform in Austin, Texas.
The agency sent a letter to Tesla Field Quality Director Eddit Gates, seeking more information on exactly how the company plans to operate the fleet in poor weather conditions. The NHTSA wants to know how Tesla’s technology and operational use cases will “assess the ability of Tesla’s system to react appropriately to reduced roadway visibility conditions.”
Additionally, the NHTSA said it would like additional information on Tesla’s development of technologies for use in ‘robotaxi’ vehicles to understand how Tesla plans to evaluate its vehicles and driving automation technologies for public roads.
Tesla has already started operating a supervised version of the Robotaxi platform for employees in both Austin and San Francisco. This limited rollout has completed thousands of rides already, but differs from the version it plans to roll out in the coming weeks in Austin, as it currently has a driver sitting in the driver’s seat.
Tesla says it has launched ride-hailing Robotaxi teaser to employees only
They are there to supervise the vehicle and ensure safety early on in the program.
The letter that was sent to Tesla on May 8 is part of a greater investigation that was opened by the NHTSA on October 17, titled “FSD Collisions in Reduced Roadway Visibility Conditions.”
The agency said the purpose of the “Preliminary Evaluation of FSD” was to assess:
- The ability of FSD’s engineering controls to detect and respond appropriately to reduced roadway visibility conditions;
- Whether any other similar FSD crashes have occurred in reduced roadway visibility conditions and, if so, the contributing circumstances for those crashes; and
- Any updates or modifications from Tesla to the FSD system that may affect the performance of FSD in reduced roadway visibility conditions. In particular, this review will assess the timing, purpose, and capabilities of any such updates, as well as Tesla’s assessment of their safety impact.
Tesla is required to respond to the NHTSA’s request by June 19.
INIM-PE24031-62887 by Joey Klender on Scribd
News
Potential affordable Tesla “Model 2/Model Q” test car spotted anew in Giga Texas
The recent footage featured an apparent test car that looks very similar to a vehicle that was spotted in the Fremont Factory last month.

Tesla has been very secretive about the “more affordable models” that it intends to start producing in the first half of 2025, but the company does seem to be quite busy testing something interesting in the Giga Texas complex. This was, at least, as per recent aerial footage from a longtime Giga Texas watcher.
The recent footage featured an apparent test car that looks very similar to a vehicle that was spotted in the Fremont Factory last month.
New Giga Texas Sighting
In a post on X, longtime Giga Texas watcher and drone operator Joe Tegtmeyer noted that he recently spotted a rather unique test car in the factory complex. The vehicle was under a car cover, but it was evidently missing its body panels and roof. Interestingly enough, it seemed to be shaped like a Model Y (it even had Model Y wheels), though it looked a bit more compact than another Model Y that was parked next to it.
Interestingly enough, a rather similar test car was spotted at another Tesla plant, the Fremont Factory in California, last month. Tesla watcher Met God in Wilderness, who has been posting aerial videos of the Fremont Factory for years, shared some footage from a drone flyover in mid-April. One of the vehicles captured in the flyover was an apparent test car that was parked next to fully-built Model Y and Model S vehicles. The test car in this sighting also looked like a compact crossover, and it was also missing its roof and body panels.
Tesla’s Affordable Cars
In the Q1 2025 Update Letter, Tesla noted that “plans for new vehicles, including more affordable models, remain on track for start of production in the first half of 2025.” In the Q1 earnings call, Tesla VP of Vehicle Engineering Lars Moravy stated that Tesla’s affordable cars would resemble the company’s existing vehicles, though they will be more affordable.
These comments suggested that Tesla’s affordable cars, which have been informally dubbed by the EV community as the “Model 2 or Model Q,” will look a lot like its two mass market vehicles, the Model 3 sedan and the Model Y crossover. “Models that come out in the next months will be built on our lines and will resemble, in form and shape, the cars we currently make. And the key is that they’ll be affordable, and you’ll be able to buy one,” Moray stated.
Elon Musk
Elon Musk invited to attend investment summit in Saudi Arabia: report
Musk’s reported invitation comes on the sidelines of United States President Donald Trump’s visit to the Middle East.

A planning note reported viewed by Reuters has indicated that Tesla CEO Elon Musk has been invited to a Saudi-U.S. investment forum in Riyadh, the capital of Saudi Arabia. The event is expected to be held on Tuesday.
Musk’s reported invitation comes on the sidelines of United States President Donald Trump’s visit to the Middle East.
Musk’s Invitation
As per Reuters, the upcoming investment forum is expected to be attended by some of the most distinguished people in the investment world. These include the CEOs of high-profile companies such as Blackrock, Citigroup, IBM, Boeing, Delta Airlines, American Airlines, and United Airlines, among others, the publication noted.
Considering the other attendees of the event, Elon Musk would likely fit right thanks to his leadership of companies like Tesla, SpaceX, and xAI, as well as his close ties with the Trump administration through his work at the Department of Government Efficiency (DOGE).
Musk and Saudi Arabia
Elon Musk’s relationship with Riyadh have notably improved since the start of Trump’s second term as United States president. Highlighting this improvement was Tesla’s launch in Saudi, which was held in April. Tesla’s launch was a notable event based on videos posted of the occasion, with the company showcasing some of its most exciting products, including Optimus, the Cybertruck, and the Cybercab, its self-driving robotaxi.
Tesla’s launch in Saudi Arabia, as well as his reported invitation to the upcoming investment forum, suggests that the CEO’s feud with Yasir Al Rumayyan, head of the $925 billion Public Investment Fund, has ended. The PIF Head was among the people involved in Elon Musk’s infamous “funding secured” tweet in 2018, which resulted in hefty fines and his removal as Tesla’s Board Chair. The PIF also sold its Tesla holdings and invested in another EV company, Lucid Group Inc.
-
News1 week ago
Tesla offers legacy Model Y owners an interesting promotion
-
News4 days ago
Tesla Cybertruck Range Extender gets canceled
-
News2 weeks ago
Tesla posts Semi factory update, shares new Semi logo design
-
News2 weeks ago
Tesla opens whopping 83 job listings for Semi program
-
News2 weeks ago
Like it or not, the new Tesla Model Y is a big hit in China
-
News2 weeks ago
Tesla Model Y with three rows and extended wheelbase rumored to start production in China
-
News2 weeks ago
Berlin Senator calls Tesla “Nazi” cars, pisses off Brandenburg because Giga Berlin is a giant employer
-
News2 weeks ago
Starlink nears S Korea launch as satellite internet demand rises