Connect with us

News

SpaceX’s space-optimized Starship engine could be ready sooner than later

Published

on

SpaceX CEO Elon Musk says that there is now a chance that a vacuum-optimized version of the Raptor engine will be ready for near-term Starship launches, indicating that development has either been re-prioritized or is going more smoothly than expected.

This is a significant shift away from a strategy discussed by Musk just four months ago, in which a single variant of Raptor was to be used on Starship and Super Heavy to shorten the next-gen rocket’s path to orbit. For unknown reasons, that approach may have already been replaced with a new alternative that would lead to a Starship with six Raptors instead of seven and a 50-50 split between vacuum and sea level-optimized engines.

Without a more specific development timeline, it’s unclear if RaptorSL-only versions of Starship will ever make it to orbit as a sort of interim solution. The fact that SpaceX is already considering an expedited vacuum variant bodes well for the current status of sea level engine testing, and Musk admittedly revealed that RaptorVac development was to be delayed just days before Raptor’s first full-scale static fire in February 2019.

Speaking less than four months ago, the purpose of delaying RaptorVac development was “to reach the moon as fast as possible.” As long as a Starship powered by unoptimized Raptors was capable of reaching the Moon, designing with RaptorVac in mind would create delays without adding any near-term benefits. The most obvious reasons that SpaceX would revert RaptorVac strategy are changes in technical confidence (i.e. full-scale Raptor testing is going better than expected) or SpaceX’s motivation to get to the Moon “as fast as possible”.

The latter explanation is certainly possible, especially in light of recent hints that there is a terminal lack of funding and Congressional interest in NASA’s Moon return proposal. SpaceX has its own commercial motivations for Starship to get to the Moon in short order, however, including some form of a contract with Japanese billionaire Yusaku Maezawa. As such, it seems more likely that SpaceX’s Raptor program is making rapid progress, outstretching the expectations of those holding the company’s strategic reins.

Just five days after its first ignition, SpaceX successfully tested Raptor SN01 at more than twice the thrust of Merlin 1D. (SpaceX)

According to Musk, sea level-optimized Raptor development is proceeding so smoothly that SpaceX may be able to move into relatively high-volume production – more than two engines per week – this summer (June 1 to August 31). At the moment, SpaceX appears to be focused on testing Raptor at its McGregor, Texas development facilities. This is no surprise for a cutting-edge rocket engine less than four months into full-scale testing, as inevitable off-nominal or unexpected behavior revealed during test fires can often lead to design optimizations or even major changes.

Since the first finalized Raptor was delivered to McGregor in late January, SpaceX has completed an average of one new engine per month, all of which have then been tested in Texas. After completing its McGregor acceptance tests, SN03 also became the first Raptor engine to leave the ground under its own power as part of Starhopper’s first two tethered hops. According to Musk, Starhopper could return to ‘flight’ as early as May 31st.

Check out Teslarati’s Marketplace! We offer Tesla accessories, including for the Tesla Cybertruck and Tesla Model 3.

Advertisement

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.

Advertisement
Comments

News

Waymo temporarily halts service in select San Francisco and LA areas amid protests

The suspensions came after several Waymo Jaguar I-Pace robotaxis were vandalized and set ablaze during the demonstrations.

Published

on

Credit: ABC7/YouTube

Waymo, Alphabet’s autonomous vehicle subsidiary, has suspended its driverless taxi operations in parts of Los Angeles and San Francisco amid violent protests linked to U.S. Immigration and Customs Enforcement (ICE) raids in the state. 

The suspensions came after several Waymo Jaguar I-Pace robotaxis were vandalized and set ablaze during the demonstrations.

Waymo Catches Strays Amid Anti-ICE Protests

Protests erupted in Los Angeles and San Francisco in response to the Trump administration’s immigration raids, which ultimately resulted in California Governor Gavin Newsom calling the White House’s deployment of National Guard troops unconstitutional. 

Amidst the protests, images and videos emerged showing several Waymo robotaxis being defaced and destroyed. At least five Waymo robotaxis ended up being caught in the crossfire, and at least one vehicle ended up being burned to the ground. 

The incident resulted in the Los Angeles Police Department advising people to avoid downtown areas due to toxic fumes from the robotaxis’ burning lithium-ion batteries. As noted in a KRON4 report, Waymo ultimately halted service in affected areas “out of an abundance of caution.”

Advertisement

Robotaxi Sentiments

The cost of the attacks is notable. Each Waymo robotaxi is valued between $150,000 and $200,000, per a 2024 Wall Street Journal report. Interestingly enough, this is not the first time that Waymo’s robotaxis ended up on the receiving end of angry protesters. On February 24, a Jaguar I-PACE robotaxi was set ablaze and vandalized by a crowd in San Francisco. Videos taken at the time showed a mob of people attacking the vehicle. 

Despite the recent attacks on its robotaxis, Waymo has stated it has “no reason to believe” its vehicles were specifically targeted during the protests, as per a report from The Washington Post. A company spokesperson also noted that some of the Waymo robotaxis that were defaced and destroyed during the violent demonstrations had been completing drop-offs near the protest zones.

Continue Reading

Investor's Corner

xAI targets $5 billion debt offering to fuel company goals

Elon Musk’s xAI is targeting a $5B debt raise, led by Morgan Stanley, to scale its artificial intelligence efforts.

Published

on

(Credit: xAI)

xAI’s $5 billion debt offering, marketed by Morgan Stanley, underscores Elon Musk’s ambitious plans to expand the artificial intelligence venture. The xAI package comprises bonds and two loans, highlighting the company’s strategic push to fuel its artificial intelligence development.

Last week, Morgan Stanley began pitching a floating-rate term loan B at 97 cents on the dollar with a variable interest rate of 700 basis points over the SOFR benchmark, one source said. A second option offers a fixed-rate loan and bonds at 12%, with terms contingent on investor appetite. This “best efforts” transaction, where the debt size hinges on demand, reflects cautious lending in an uncertain economic climate.

According to Reuters sources, Morgan Stanley will not guarantee the issue volume or commit its own capital in the xAI deal, marking a shift from past commitments. The change in approach stems from lessons learned during Musk’s 2022 X acquisition when Morgan Stanley and six other banks held $13 billion in debt for over two years.

Morgan Stanley and the six other banks backing Musk’s X acquisition could only dispose of that debt earlier this year. They capitalized on X’s improved operating performance over the previous two quarters as traffic on the platform increased engagement around the U.S. presidential elections. This time, Morgan Stanley’s prudent strategy mitigates similar risks.

Advertisement

Beyond debt, xAI is in talks to raise $20 billion in equity, potentially valuing the company between $120 billion and $200 billion, sources said. In April, Musk hinted at a significant valuation adjustment for xAI, stating he was looking to put a “proper value” on xAI during an investor call.

As xAI pursues this $5 billion debt offering, its financial strategy positions it to lead the AI revolution, blending innovation with market opportunity.

Continue Reading

News

SpaceX to debut new Dragon capsule in Axiom Space launch

Ax-4’s launch marks the debut of SpaceX’s latest Crew Dragon and pushes Axiom closer to building its own space station.

Published

on

spacex-dragon-axiom-ax-4-mission-iss
(Credit: SpaceX)

Axiom Space’s Ax-4 mission targets the International Space Station (ISS) with a new SpaceX Crew Dragon capsule.

The Axiom team will launch a new SpaceX Dragon capsule atop a Falcon 9 rocket from NASA’s Kennedy Space Center in Florida on Wednesday at 8:00 a.m. EDT (1200 GMT). The Ax-4 mission launch was initially set for Tuesday, June 10, but was delayed by one day due to expected high winds.

As Axiom Space’s fourth crewed mission to the ISS, Ax-4 marks the debut of an updated SpaceX Crew Dragon capsule. “This is the first flight for this Dragon capsule, and it’s carrying an international crew—a perfect debut. We’ve upgraded storage, propulsion components, and the seat lash design for improved reliability and reuse,” said William Gerstenmaier, SpaceX’s vice president of build and flight reliability.

Axiom Space is a Houston-based private space infrastructure company. It has been launching private astronauts to the ISS for research and training since 2022, building expertise for its future station. With NASA planning to decommission the ISS by 2030, Axiom has laid the groundwork for the Axiom Station, the world’s first commercial space station. The company has already begun construction on its ISS replacement.

Advertisement

The Ax-4 mission’s research, spanning biological, life, and material sciences and Earth observation, will support this ambitious goal. Contributions from 31 countries underscore the mission’s global scope. The four-person crew will launch from Launch Complex 39A, embarking on a 14-day mission to conduct approximately 60 scientific studies.

“The AX-4 crew represents the very best of international collaboration, dedication, and human potential. Over the past 10 months, these astronauts have trained with focus and determination, each of them exceeding the required thresholds to ensure mission safety, scientific rigor, and operational excellence,” said Allen Flynt, Axiom Space’s chief of mission services.

The Ax-4 mission highlights Axiom’s commitment to advancing commercial space exploration. By leveraging SpaceX’s Dragon capsule and conducting diverse scientific experiments, Axiom is paving the way for its Axiom Station. This mission not only strengthens international collaborations but also positions Axiom as a leader in the evolving landscape of private space infrastructure.

Continue Reading

Trending