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SpaceX’s Starship rocket just took a big leap towards orbit with latest test success

Starship has passed the most significant milestone in the history of the ambitious launch vehicle. (NASASpaceflight - bocachicagal)

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5 years ago

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A full-scale Starship rocket has passed a critical test for the first time ever, strongly suggesting that the next-generation launch vehicle could be much closer to orbital readiness than most would imagine.

To be clear, a huge amount of work remains before Starship can be deemed anywhere close to its first orbital flight tests, not the least of which is the fabrication and assembly of the first massive Super Heavy booster(s). However, after Starship SN4’s latest successful May 9th test, it’s hard to see any apparent showstoppers that can’t be handled with a combination of fairly routine testing and iterative progress, as well as time and money. There is certainly room for improvement throughout the program but SpaceX has effectively demonstrated that the biggest practical concerns about its approach to Starship are moot.

Captured live on May 9th and 10th by local resident and photographer Mary (bocachicagal) with the help of NASASpaceflight.com, SpaceX worked for about two days to reconfigure its fourth full-scale Starship prototype after two successful Raptor engine static fires and prepare it for a different kind of test. That work mainly involved removing said Raptor and replacing it with a hydraulic ram stand used to simulate the thrust of 1-3 engines without actually needing to perform a static fire test, further allowing SpaceX to simulate much longer engine operations than its spartan test pad could survive. Around 9pm CDT on May 9th (02:00 UTC, May 10), Starship SN4’s latest trial began.

Known as a cryogenic pressure and load test, it differed from a prior “cryo proof test” completed on April 26th, in which Starship was fully loaded with liquid nitrogen (more than twice as cold as dry ice), pressurized to a bit less than 5 bar (~70 psi), and stressed with hydraulic rams. About a week later, after installing a Raptor engine on a full-scale Starship prototype for the first time ever, Starship SN4 fired up said engine on May 5th – another historic first for the next-generation launch vehicle. 30 hours later, SpaceX performed another wet dress rehearsal (WDR) with liquid methane and oxygen and fired up Starship’s Raptor engine again.

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After about 48 hours of reconfiguration, SpaceX moved on to a much more serious cryogenic test. As noted by CEO Elon Musk, the 4.9 bar the rocket previously reached was accepted as enough to perform a Raptor static fire test and possibly enough for a low-stress, low-altitude flight test to ~150m (500 ft). For orbital flight, however, Starship needs to withstand a minimum of 6 bar (~90 psi), while 8.5 bar (125 psi) is preferable to give the rocket the 1.4x safety factor optimal for human spaceflight.

This time, SpaceX – having successfully gathered data from two static fire tests and several wet dress rehearsals – was ready to risk Starship SN4 and pressurized it all the way to 7.5 bar (~110 psi). While ~12% shy of minimum human spaceflight standards, Starship SN4 successfully reached and maintained 7.5 bar while the ship stressed with hydraulic rams to simulate the thrust of three Raptor engines, all of which it survived fully intact. What 7.5 bar does offer, however, is a 1.25x safety factor – on the higher end of aerospace industry standards for uncrewed orbital spaceflight (i.e. cargo/satellite launches).

If Starship can reliably sustain tank pressures of 7.5 bar, the ship’s structure is effectively ready for orbital flight. (SpaceX)

Ready for orbit?

Technically, this means that – pending much additional testing and verification with different serial prototypes and (likely) higher pressures – Starship’s stainless steel structure is effectively qualified for uncrewed orbital launches. Of course, reality is much more complex. To actually perform and survive orbital flights, SpaceX will first need to build and similarly qualify the first Super Heavy boosters and ensure that those unprecedentedly large rockets can survive and sustain ~20-30 Raptor engines firing simultaneously.

Super Heavy’s Raptor count has been reduce to 31 engines but that quantity will still give it the most of any rocket booster in history. (SpaceX)

Aside from Super Heavy, it’s unknown if SpaceX has begun testing Raptor engines at the durations they will need to burn to booster Starships into orbit (TBD; likely 5-10 minutes of continuous operation). Along those lines, SpaceX also needs to build, test, and qualify Raptor’s vacuum-optimized sibling to complement the sea level version’s smaller, less-efficient nozzle. Still, Musk has already revealed that RaptorVac could be a matter of weeks from its first static fire and rocket engine development – while incredibly challenging – is more of a known quantity for SpaceX.

Perhaps the most important unknown is whether SpaceX’s recent May 2020 WDRs and static fires have used autogenous pressurization, a more efficient method of pressurizing rockets by using hot gas generated by their own engines. It’s extremely likely that SpaceX has been autogenously pressurizing Starship SN4 for its recent tests, but if that weren’t the case, it would be a big source of schedule uncertainty without significant redesign work.

Ultimately, SpaceX appears to have proven that orbital-class rockets can be built cheaply out of commodified steel in extraordinarily spartan production facilities. Many, many challenges remain but the biggest uncertainty and hurdle facing SpaceX’s Starship program and ambitions is well on its way to being fully put to rest.

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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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SpaceX Starship gets FAA nod for ninth test flight

The FAA has given the green light for Starship’s ninth test flight.

Published

8 hours ago

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May 22, 2025

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(Credit: SpaceX)

SpaceX has received FAA approval for the ninth test flight of the Starship rocket. The approval was delayed due to the federal agency finishing its comprehensive safety review of the eighth flight earlier this year.

The FAA said in a statement that it has determined that SpaceX has “satisfactorily addressed the causes of the mishap, and therefore, the Starship vehicle can return to flight.”

The eighth test flight occurred back on March 6. SpaceX completed a successful liftoff of Starship and the Super Heavy Booster, before the two entered stage separation a few minutes after launch.

Starship Flight 8: SpaceX nails Super Heavy booster catch but loses upper stage

The booster returned and was caught by the chopsticks on the launch pad, completing the second successful booster catch in the program’s history. However, SpaceX lost contact with Starship in the upper atmosphere.

The ship broke up and reentered the atmosphere over Florida and the Bahamas.

The debris situation caused the FAA to initiate a mishap investigation:

The FAA said it will verify that SpaceX implements all the corrective actions on Flight 9 that it discovered during the mishap investigation.

There is no current confirmed launch window, but the earliest it could take off from Starbase is Tuesday, May 27, at 6:30 p.m. local time.

To prevent any injuries and potentially limit any damage, the FAA has stayed in contact with various countries that could be impacted if another loss of vehicle occurs:

“The FAA is in close contact and collaboration with the United Kingdom, Turks & Caicos Islands, Bahamas, Mexico, and Cuba as the agency continues to monitor SpaceX’s compliance with all public safety and other regulatory requirements.”

The agency has also stated that the Aircraft Hazard Area (AHA) is approximately 1,600 nautical miles and extends eastward from the Starbase, Texas, launch site through the Straits of Florida, including the Bahamas and Turks & Caicos.

For flight 8, the AHA was just 885 nautical miles.

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Hyundai begins real-world testing of AI-powered EV charging robot

Published

10 hours ago

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May 22, 2025

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Credit: Hyundai

Hyundai announced on Thursday that it has officially launched real-world testing of its AI-powered EV charging robot, which it is referring to as the ACR.

The Korean company is partnering with both Kia and Incheon International Airport for the testing phase, which was launched with a memorandum of understanding (MOU). The pilot program is going to be used to lay the groundwork for future robot use for EV charging.

Incheon already has a reputation that aligns with the pilot program as it has the largest eco-friendly vehicle infrastructure in Korea, according to Korea JoongAng Daily, which first reported the launch of the pilot program.

Hyundai is partnering with Kia’s Robotics Lab to provide hardware and software solutions for this early rollout.

Yan Hee-won, President of Hyundai Motor’s R&D Division, said:

“This marks an important turning point in validating the practical value of future mobility technologies. With customized automatic charging solutions, we aim to deliver a more convenient and enhanced mobility experience for users.”

The testing phase will be limited in the sense that the charging robot will be deployed for a fleet of eco-friendly airport vehicles. Those who park their EVs at the airport will not be able to use it for use while they’re traveling — at least at first.

Eventually, it will become a great way to give vehicles range while the owners are off on trips.

Tesla had a similar idea several years ago, which it shared viral videos of back in 2015.

Tesla “snake charger” wasn’t just a creepy one-off, suggests Elon Musk

Musk said in 2020 that Tesla still had the intention of making it. However, it has shifted to wireless induction charging, which seems to be a better option simply because of fewer moving parts and better compatibility with the upcoming Robotaxi fleet.

Tesla flexes Robotaxi wireless charging — autonomy from top to bottom

Tesla displayed its wireless charging idea at the “We, Robot” event last year:

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How Tesla could benefit from the ‘Big Beautiful Bill’ that axes EV subsidies

Tesla has a few paths to limit damage from the elimination of tax credits.

Published

11 hours ago

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May 22, 2025

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President Donald J. Trump purchases a Tesla on the South Lawn, Tuesday, March 11, 2025. (Official White House Photo by Molly Riley)
President Donald J. Trump purchases a Tesla on the South Lawn, Tuesday, March 11, 2025. (Official White House Photo by Molly Riley)

The United States House of Representatives passed President Trump’s “Big Beautiful Bill” by a vote of 215 to 214 on Thursday, effectively bringing an end to many EV subsidy programs, like the $7,500 tax credit, by the end of this year.

The bill will not only eliminate the $7,500 credit on new EV purchases, but also the $4,000 credit given on the purchase of used electric vehicles, and a $1,000 credit on the installation of Level 2 chargers. It will also impact solar subsidies that help generate clean energy in a residential setting.

EVs would also be subject to a $250 road use fee.

All of these things sound like negatives — truly because they are. Those who are not in a financial position to buy an EV this year, even with the tax credit, might not be able to afford them in the coming years either, unless manufacturers are able to bring pricing to a level that is more accessible to consumers.

In theory, President Trump’s focus on bringing manufacturing back to America would bring prices down, but it won’t happen overnight. Companies will take many years to completely bring manufacturing and part sourcing to the United States.

However, Tesla could feel some positives from this bill, and it all comes down to timing. Of course, in the long term, it wouldn’t be great for the company, especially if it did not have two things going on right now: a slightly lagging delivery pace and the introduction of affordable models.

Tax Credit Sunsetting Advantage

Sunsetting the $7,500 tax credit means one thing: those who have been in limbo over buying an EV from Tesla are going to have to make a decision on whether they want to buy this year and still have access to the credit, or test their luck and hope for price reductions.

More than likely, those who have been on the fence will be willing to pull the trigger this year, and Tesla will definitely gain some sales from this fact alone. Other automakers will, too.

This could help offset Tesla’s slow start to the year, which has been caused by the changeover of production lines of the Model Y across each of its factories globally.

Affordable Models

Tesla said earlier this year that it will roll out affordable models in the first half of 2025. These cars are expected to be around the $30,000 mark, but the company has not shed any true information on what they will cost.

Potential affordable Tesla “Model 2/Model Q” test car spotted anew in Giga Texas

Ideally, the cars would cost under $30,000 without the EV tax credit, which would be more than accessible for many car buyers in the United States.

The introduction of models that are not in need of a tax credit to be affordable to the masses. This would help offset some of the losses Tesla might feel from cars losing the tax credit.

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