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SpaceX Starship prototypes swap places for next hop test

SpaceX has swapped two almost identical Starships in preparation for the next hop test. (NASASpaceflight - bocachicagal)

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SpaceX is swapping two almost identical Starships to allow for the first flight-proven prototype to be repaired while wasting no time preparing for the next Starship hop test.

Known as Starships serial number 5 and 6 (SN5/SN6), the twin prototypes were built more or less simultaneously and completed within a few weeks of each other. Due to a number of delays largely unrelated to Starship SN5 itself, the rocket’s test campaign suffered several weeks of delays, giving SpaceX’s production team plenty of time to complete sister ship SN6 well before it was needed. For a time, it wasn’t even clear if SN6 had a future, given comments made by CEO Elon Musk that the next full-scale prototype – Starship SN8 – would be a significant upgrade, potentially making SN6 redundant.

However, on August 3rd, SN5 stunned with what appeared to be an almost flawless Starship hop debut. The success confirmed that the design – while likely outdated upon SN8’s arrival – was still more than satisfactory for low-altitude, low-velocity flight tests. In the afterglow of a milestone ~18 months in the making, Musk almost immediately revealed that SpaceX’s next goal was to perform hop test after hop test until Starship flight operations are more or less routine. Today’s transport operations mean that that multi-hop test campaign could be right around the corner.

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In line with additional information conveyed by Musk a few days after SN5’s hop debut, SpaceX has transported Starship SN5 back to nearby production facilities and quite literally traded places with Starship SN6 in a vertical assembly hangar.

Starships SN5 and SN6 are pictured here in the late stages of assembly on June 16th. (NASASpaceflight – bocachicagal)

Right on schedule, SpaceX also transported Starship SN6 to the launch pad on the same day as Starship SN5’s factory return. If most of Starship SN5’s testing delays were primarily related to the significant repairs and upgrades made to the pad’s ground support equipment after SN4’s destructive explosion and the launch mount – a steel structure that supports, powers, and fuels Starships – is mostly unscathed after SN5’s hop debut, Starship SN6 could have a much smoother path to testing.

SpaceX teams work to inspect (and presumably repair) the Starship launch mount after SN5’s August 3rd hop debut. (NASASpaceflight – bocachicagal)
Aside from replacement landing legs and, possibly, a new Raptor engine, it’s unclear what repairs Starship SN5 needs before it can prepare for a second hop. (NASASpaceflight – bocachicagal)
On August 5th, SpaceX began stacking Starship SN8 beside the already-completed Starship SN6 prototype. (NASASpaceflight – bocachicagal)

SpaceX has already begun outfitting the launch mount with a hydraulic ram device used to simulate the thrust of a Raptor engine by mechanically stressing a Starship’s thrust structure. That confirms that SpaceX will test Starship SN6 much like the last few prototypes to reach the pad, beginning with an ambient temperature leak test and a cryogenic proof test with liquid nitrogen and Raptor thrust simulation. Once completed, SpaceX will install one Raptor engine on the Starship prototype and proceed into the wet dress rehearsal (WDR) and static fire phase of testing.

Based on Starship SN4’s test campaign, SN6 could kick off its first cryogenic proof test just four days after the rocket is transported to the launch site, followed by a Raptor static fire just a week or so later.

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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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USDOT Secretary visits Tesla Giga Texas, hints at national autonomous vehicle standards

The Transportation Secretary also toured the factory’s production lines and spoke with CEO Elon Musk.

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Credit: Elon Musk/X

United States Department of Transportation (USDOT) Secretary Sean Duffy recently visited Tesla’s Gigafactory Texas complex, where he toured the factory’s production lines and spoke with CEO Elon Musk. In a video posted following his Giga Texas visit, Duffy noted that he believes there should be a national standard for autonomous vehicles in the United States.

Duffy’s Giga Texas Visit

As could be seen in videos of his Giga Texas visit, the Transportation Secretary seemed to appreciate the work Tesla has been doing to put the United States in the forefront of innovation. “Tesla is one of the many companies helping our country reach new heights. USDOT will be right there all the way to make sure Americans stay safe,” Duffy wrote in a post on X. 

He also praised Tesla for its autonomous vehicle program, highlighting that “We need American companies to keep innovating so we can outcompete the rest of the world.”

National Standard

While speaking with Tesla CEO Elon Musk, the Transportation Secretary stated that other autonomous ride-hailing companies have been lobbying for a national standard for self-driving cars. Musk shared the sentiment, stating that “It’d be wonderful for the United States to have a national set of rules for autonomous driving as opposed to 50 independent sets of rules on a state-by-state rules basis.”

Duffy agreed with the CEO’s point, stating that, “You can’t have 50 different rules for 50 different states. You need one standard.” He also noted that the Transportation Department has asked autonomous vehicle companies to submit data. By doing so, the USDOT could develop a standard for the entire United States, allowing self-driving cars to operate in a manner that is natural and safe.

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Tesla posts Optimus’ most impressive video demonstration yet

The humanoid robot was able to complete all the tasks through a single neural network.

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Credit: Tesla Optimus/X

When Elon Musk spoke with CNBC’s David Faber in an interview at Giga Texas, he reiterated the idea that Optimus will be one of Tesla’s biggest products. Seemingly to highlight the CEO’s point, the official Tesla Optimus account on social media platform X shared what could very well be the most impressive demonstration of the humanoid robot’s capabilities to date.

Optimus’ Newest Demonstration

In its recent video demonstration, the Tesla Optimus team featured the humanoid robot performing a variety of tasks. These include household chores such as throwing the trash, using a broom and a vacuum cleaner, tearing a paper towel, stirring a pot of food, opening a cabinet, and closing a curtain, among others. The video also featured Optimus picking up a Model X fore link and placing it on a dolly.

What was most notable in the Tesla Optimus team’s demonstration was the fact that the humanoid robot was able to complete all the tasks through a single neural network. The robot’s actions were also learned directly from Optimus being fed data from first-person videos of humans performing similar tasks. This system should pave the way for Optimus to learn and refine new skills quickly and reliably.

Tesla VP for Optimus Shares Insight

In a follow-up post on X, Tesla Vice President of Optimus (Tesla Bot) Milan Kovac stated that one of the team’s goals is to have Optimus learn straight from internet videos of humans performing tasks, including footage captured in third person or by random cameras.

“We recently had a significant breakthrough along that journey, and can now transfer a big chunk of the learning directly from human videos to the bots (1st person views for now). This allows us to bootstrap new tasks much faster compared to teleoperated bot data alone (heavier operationally).

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“Many new skills are emerging through this process, are called for via natural language (voice/text), and are run by a single neural network on the bot (multi-tasking). Next: expand to 3rd person video transfer (aka random internet), and push reliability via self-play (RL) in the real-, and/or synthetic- (sim / world models) world,” Kovac wrote in his post on X.

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Starship Flight 9 nears as SpaceX’s Starbase becomes a Texan City

SpaceX’s launch site is officially incorporated as Starbase, TX. Starship Flight 9 could launch on May 27, 2025. 

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(Credit: Jenny Hautmann/Wikimedia Commons)

SpaceX’s Starbase is officially incorporated as a city in Texas, aligning with preparations for Starship Flight 9. The newly formed city in Cameron County serves as the heart of SpaceX’s Starship program.

Starbase City spans 1.5 square miles, encompassing SpaceX’s launch facility and company-owned land. A near-unanimous vote by residents, who were mostly SpaceX employees, led to its incorporation. SpaceX’s Vice President of Test and Launch, Bobby Peden, was elected mayor of Starbase. The new Texas city also has two SpaceX employees as commissioners. All Starbase officials will serve two-year terms unless extended to four by voters.

As the new city takes shape, SpaceX is preparing for the Starship Flight 9 launch, which is tentatively scheduled for May 27, 2025, at 6:30 PM CDT from Starbase, Texas.

SpaceX secured Federal Aviation Administration (FAA) approval for up to 25 annual Starship and Super Heavy launches from the site. However, the FAA emphasized that “there are other licensing requirements still to be completed,” including policy, safety, and environmental reviews.

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On May 15, the FAA noted SpaceX updated its launch license for Flight 9, but added: “SpaceX may not launch until the FAA either closes the Starship Flight 8 mishap investigation or makes a return to flight determination. The FAA is reviewing the mishap report SpaceX submitted on May 14.”

Proposed Texas legislation could empower Starbase officials to close local highways and restrict Boca Chica Beach access during launches. Cameron County Judge Eddie Trevino, Jr., opposes the Texas legislation, insisting beach access remain under county control. This tension highlights the balance between SpaceX’s ambitions and local interests.

Starbase’s incorporation strengthens SpaceX’s operational base as it gears up for Starship Flight 9, a critical step in its mission to revolutionize space travel. With growing infrastructure and regulatory hurdles in focus, Starbase is poised to become a cornerstone of SpaceX’s vision, blending community development with cutting-edge aerospace innovation.

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