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SpaceX CEO Elon Musk: Starship prototype to have 3 Raptors and “mirror finish”

SpaceX CEO Elon Musk visited the South Texas site where Starship's first prototype is being built on December 23rd. (Elon Musk)

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Taking to Twitter once more to reveal additional information about SpaceX’s radically changing BFR/Starship prototype program, CEO Elon Musk has made an unexpected visit to the company’s South Texas BFR testing facilities to oversee rapid progress with a low-fidelity hop test prototype of the orbital Starship spacecraft.

Included in a handful of replies that followed the tweeted image, Musk described some of the key advantages of a stainless steel Starship – including mirror-like thermal reflectivity for hot reentries and a “usable” strength-to-mass ratio superior to carbon fiber – as well as features of prototype cousin.

While the CEO did imply on Saturday that the Mars-focused Raptor engine had been what he described as “radically redesigned”, Musk’s statement that the Starship hopper will feature three Raptor engines does at least set a lower bound for the ship’s maximum gross takeoff weight when the time comes for it to take flight.

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While the suggestion that Raptor’s turbopumps (basically fuel pumps) would need at least 100,000 HP per engine seems to indicate that the flight design’s thrust has been appreciably uprated, a past figure of ~2000 kN (450,000 lbf) per engine suggests that Starship V0.1 could weigh as much as an entire Falcon 9 Block 5 rocket (~1.2 million pounds, 550,000 kg) and still having a solid 80-100% of Falcon 9’s liftoff thrust. Put simply, the rocket that appears to be coming together in the boonies of South Texas could rival almost any other liquid fuel rocket booster in service, while still being the testbed for BFR’s upper stage alone.

While it’s ambiguous if several additional comments applied to the Starship prototype, the final product, or both, Musk also indicated that some of the biggest benefits of a shift away from carbon composites to stainless steel would be relative ease with which the material handles extreme heating. Thanks to the fact that stainless steel can ultimately be polished to mirror-like levels of reflectivity and that mirrors are some of the most efficient reflectors of thermal energy (heat), shiny and unpainted steel would ultimately perform far better than carbon composites and could end up requiring “much less” heat shielding for the same performance.

 

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Perhaps most unintuitive is the fact that steel can apparently beat carbon composites when it comes to usable strength-to-weight ratios at supercool temperatures. According to Musk, steel also performs “vastly better” at high temperatures and appreciably better at room temperatures. A comment made on Saturday may lend additional credence to what seems at face value to contradict basic material intuition –  at least some of the stainless steel SpaceX is examing would be a special (presumably SpaceX-engineered) alloy that has undergone what is known as cryogenic treatment, in which metals are subjected to extremely cold conditions to create some seriously unintuitive properties. Ultimately, cold-formed/worked or cryo-treated steel can be dramatically lighter and more wear-resistant than traditional hot-rolled steel.

Combined with advanced new alloys and a uniquely strong handle on working with supercool propellant (likely transferable to cold-forming steel), SpaceX and CEO Elon Musk could have a true breakthrough on their hands, especially if it turns out that a great deal of deep thought, analysis, and refinement fed into these “radical” design changes. With Starship Alpha’s hop tests potentially beginning as early as March 2019, we won’t have long to wait to find out.


For prompt updates, on-the-ground perspectives, and unique glimpses of SpaceX’s rocket recovery fleet check out our brand new LaunchPad and LandingZone newsletters!

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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 is partnering with chipmakers to enable Starlink satellite-to-cell service

President Gwynne Shotwell outlined the effort during a space industry conference in Paris.

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Credit: SpaceX/X

SpaceX is working with microchip manufacturers to integrate satellite-connectivity hardware into smartphones, advancing its plan for direct-to-device services through Starlink. 

The move follows the company’s $17 billion acquisition of wireless spectrum from EchoStar Corp., a deal that positions SpaceX to operate more independently of traditional telecom carriers. 

President Gwynne Shotwell outlined the effort during a space industry conference in Paris this week, as noted in a Bloomberg News report.

Starlink direct-to-device

Starlink currently serves millions of customers in over 100 countries, primarily through ground-based dishes. The company, however, is now expanding into satellite-to-cell service, which should enable unmodified phones to connect directly with orbiting satellites. While SpaceX has a partnership with T-Mobile US, the EchoStar spectrum purchase gives it more control to negotiate with global carriers on its own terms.

“We’re working with chip manufacturers to get the proper chips in phones,” the SpaceX President stated. “We will now be initiating discussions with telcos in a different way now. Now it’s our spectrum, but we want to work with them, almost providing capacity and wholesaling capacity to their customers.”

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The company plans to launch satellites capable of supporting its direct-to-device business within two years, with early mobile phone testing expected by late 2026.

Starship program continues test flights

Shotwell also addressed SpaceX’s Starship program, which recently completed its 10th test flight in August. She said the mission met all objectives, providing a critical morale boost to teams after a challenging development year. 

“My Starship team needed that win,” Shotwell noted. “Development programs always are kind of a 24/7 operation, and I was really pleased for them.”

SpaceX is planning to fly one more iteration of the current Starship prototype, known as V2, before transitioning to the next-generation V3 vehicle. That version, expected to debut late this year or early 2026, is designed to be more capable and support eventual crewed missions to the Moon and Mars. 

“The V3, which we want to fly hopefully late this year, but maybe early next year, is really the vehicle that could take humans to the moon and Mars,” Shotwell stated.

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U.S. Judge dismisses lawsuit against SpaceX Starship Boca Chica launch site

The ruling found that the FAA had met its obligations in reviewing the potential environmental effects of Starship launches.

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(Credit: SpaceX)

A U.S. district court judge has dismissed a lawsuit brought by conservation groups challenging the Federal Aviation Administration’s approval of SpaceX’s expanded rocket launch operations in Boca Chica, Texas. 

The ruling, issued Monday, found that the FAA had met its obligations in reviewing the potential environmental effects of Starship launches.

FAA review withstands legal challenge

The lawsuit centered on whether the FAA properly assessed the impact of SpaceX’s operations on endangered wildlife, including ocelots, jaguarundis, and Kemp’s Ridley sea turtles, as noted in a report from The Guardian. The plaintiffs argued that noise, light pollution, and construction activity degraded the surrounding habitat, which also serves as nesting grounds for threatened shorebirds.

The lawsuit cited SpaceX’s April 2023 Starship test, which destroyed its launchpad and scattered debris across a large area. The blast reportedly ignited a grassfire and damaged wildlife habitats, including a bobwhite quail nest.

Judge Carl Nichols, for his part, ruled that the FAA had satisfied its obligation“to take a hard look at the effects of light on nearby wildlife.” The decision effectively cleared a regulatory hurdle for SpaceX, which has been working to expand Starship launch activity at its Boca Chica facility.

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A continued ramp

SpaceX continues to scale its operations nationwide. Beyond Starship, the company is also seeking approval to nearly double Falcon rocket launches from Vandenberg Space Force Base in California, from 50 annually to 95. 

Former President Trump has also shared his intention to increase U.S. launch capacity, setting a target for substantial growth by 2030. Considering that SpaceX is by far the world’s dominant launch provider, Trump’s support for more launches will likely benefit the private space company.

For now, at least, the ruling should allow continued expansion at a time when Starship remains central to long-term goals such as Mars missions and NASA’s Artemis program.

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Elon Musk

SpaceX to expand Central Texas facility with $8M Bastrop project

Bastrop is already the site of several Elon Musk-led ventures.

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Credit: SpaceX

SpaceX is set to expand its presence in Central Texas with an $8 million project to enlarge its Bastrop facility, as per state filings. 

The 80,000-square-foot addition, which is scheduled to begin construction on September 24 and wrap in early January 2026, was registered with the Texas Department of Licensing and Regulation and initially reported by My San Antonio

New investment

Bastrop is already the site of several Elon Musk-led ventures. The upcoming expansion will extend SpaceX’s office at 858 FM 1209, near Starlink’s operations and The Boring Company’s facilities. Just down the road, X is housed in the Hyperloop Plaza at 865 FM 1209.

SpaceX’s expansion reflects a steady buildup of resources in Bastrop since the private space firm established its presence in the area. The addition was praised by Tesla Governor Greg Abbott, who wrote on X that the expansion will “bring more jobs, innovations and will strengthen Starlink’s impact worldwide.” 

State support

In March, Gov. Greg Abbott announced a $17.3 million state grant to SpaceX for an “expansion of their semiconductor research and development (R&D) and advanced packaging facility in Bastrop.” The project is expected to create more than 400 new jobs and generate over $280 million in capital investment.

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Following the grant award, the Texas Governor also noted that SpaceX’s facility would be growing by 1 million square feet across three years to boost its Starlink program. SpaceX’s Starlink division is among the company’s fastest-growing segments, with the satellite internet system connecting over 6 million users and counting worldwide. 

Recent reports have also indicated that Starlink has struck a deal with EchoStar to acquire 50 MHz of exclusive S-band spectrum in the United States and global Mobile Satellite Service (MSS) licenses. This should pave the way for Starlink to provide 5G coverage worldwide, even in remote areas. 

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