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SpaceX outfits first orbital-class Starship booster with grid fins, Raptor engines

Super Heavy Booster 4 has had four grid fins installed, been stacked to its full height, and has begun Raptor installation in a single two-day period. (NASASpaceflight - bocachicagal)

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In the space of two days, SpaceX has outfitted Starship’s first orbital-class Super Heavy booster with four car-sized grid fins, stacked the rocket to its full height, and begun the process of installing up to 29 Raptor engines.

As part of what CEO Elon Musk has described as a “Starbase Surge,” SpaceX has reportedly sent hundreds of employees normaly stationed in California, Florida, and Central Texas to Boca Chica. There, SpaceX has been working for months to build Starship’s first orbital launch pad and first orbital-class ship and booster and prepare all three for an inaugural “Orbital Test Flight” as quickly as possible. Originally scheduled to occur no later than July 2021, Musk’s extremely ambitious target unsurprisingly came and went but SpaceX appears to be well on its way to an “aim for the Moon; miss; fall among the stars” situation as all the parts of Starship’s orbital launch debut begin to come together.

In the last few days, it’s become abundantly clear that SpaceX is likely moving faster than even its most optimistic followers expected.

On July 30th, after less than two days of assembly, Super Heavy Booster 4’s completed (upper) methane tank stack – 13 rings and ~25m (85 ft) tall was briefly rolled out of SpaceX’s Boca Chica ‘high bay.’ A few hours later, the booster tank was rolled back in and SpaceX technicians kicked off the installation of four car-sized steel grid fins. A day and a half later, all four fins were installed.

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Unlike the famous cast titanium grid fins on Falcon boosters, Super Heavy’s fins are built out of welded steel (much heavier but magnitudes cheaper) and not designed to retract, meaning that they will remain in their deployed configuration at all times. While also allowing for a much simpler design, B4’s fixed (but rotatable) grid fins will also make it dramatically easier to catch Super Heavy boosters – as Elon Musk has said is the plan – on their grid fins using a giant tower with arms.

Almost immediately after the last grid fin was installed, SpaceX moved Super Heavy B4’s larger (aft) liquid oxygen tank stack onto a stand optimized for transport and stacked the newly finned methane tank on top of the rocket, raising it to its full ~65m (~215 ft) height. After stacking, it takes a team of SpaceX welders at least several hours to join the two steel booster sections into one monolithic rocket.

At the same time as technicians were working to complete Booster 4’s airframe, SpaceX accepted delivery of no less than five Raptor engines, raising the total number of engines delivered in the last five days to at least 18 – including two Raptor Vacuum variants for Starship S20.

In a sign of the breakneck pace SpaceX is working at, teams began installing Raptor engines on Booster 4 before its two halves were fully welded together. In a matter of hours, no less than 12 Raptor Boost (RB) engines have been rolled out of one of SpaceX’s three Boca Chica factory tents and lined up for installation on the first flightworthy Super Heavy. Requiring 29 engines total, it’s not implausible that SpaceX is attempt to fully outfit Booster 4 with all of its Raptors before rolling the rocket down the road to the orbital launch pad.

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According to Elon Musk, SpaceX could attempt to install the Super Heavy booster on the pad’s launch mount/table (integrated just days ago) as early as “~Tuesday” and the company has already filed for transport-related road closure on Monday afternoon.

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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Elon Musk’s $10 Trillion robot: Inside Tesla’s push to mass produce Optimus

Tesla’s surging Optimus job listings reveal a company sprinting from prototype to one million robot production.

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Tesla is accelerating its push to bring the Optimus humanoid robot to high volume production, and its recent job listings tells the story as clearly as any earnings call.

With well over 100 Optimus related job openings now posted across its U.S. facilities, Tesla is signaling a critical pivot for the program, moving it from a captivating tech demo to a serious manufacturing endeavor. Roles span the full spectrum of the product lifecycle, from Robotics Software Engineers and Manufacturing Engineers to Mechanical Integration Engineers and AI Engineers focused on world modeling and video generation. One active listing for a Software Engineer on the Optimus team asks candidates to build scalable and reliable data pipelines for Optimus manufacturing lines and develop automation tools that accelerate analysis and visualization for mass manufacturing.

Tesla is racing toward a one million unit annual production target. The clearest signal yet that Tesla is treating Optimus as its primary business came on January 28, 2026, during the company’s Q4 2025 earnings call. Musk announced that Tesla is ending production of the Model S and Model X, and will repurpose those lines at its Fremont, California factory to build Optimus humanoid robots.

A production intent prototype of Optimus Version 3 is planned to be ready in early 2026, after which Tesla intends to build a one million unit production line with a targeted production start by the end of 2026. To support that ramp, Tesla broke ground on a massive new Optimus manufacturing facility at Gigafactory Texas in late 2025, with ambitions to eventually reach 10 million units per year.

Tesla Giga Texas to feature massive Optimus V4 production line

The business case for scaling this aggressively is rooted in labor economics. Musk has stated that “Optimus has the potential to be the biggest product of all time,” reasoning that if Tesla can produce capable humanoid robots at scale and reasonable cost, every task currently performed by human labor becomes a potential application. In a separate statement, Musk framed Optimus’s long term importance even more bluntly, saying it could surpass Tesla’s vehicle business in scale with the potential to generate $10 trillion in revenue.

The industries Tesla is targeting first are those most burdened by repetitive physical labor. Early applications include manufacturing assembly, material handling and quality inspection, as well as logistics tasks like loading, unloading, sorting, and transporting goods in warehouses and distribution centers. Longer term, Tesla’s vision is for Optimus to penetrate household, medical, and logistics scenarios at the scale of a smartphone rollout.

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Tesla officially begins sunset of Model S and Model X

In the latest move to show Tesla is planning to eliminate the Model S and Model X from production, the company’s Korean arm has officially set a firm cutoff date of March 31, 2026, for new orders of both models.

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Credit: Tesla

Tesla has officially started its process of sunsetting the Model S and Model X just months after the company confirmed it would stop producing the two flagship vehicles in 2026.

This step marks the end of an era for the vehicles that helped establish not only Tesla’s prowess as an automaker but also its status as a disruptor in the entire car industry. While these two cars have done a tremendous amount for Tesla, the signal that it is time to wind down their production has evidently arrived.

In the latest move to show Tesla is planning to eliminate the Model S and Model X from production, the company’s Korean arm has officially set a firm cutoff date of March 31, 2026, for new orders of both models.

This is the first time Tesla has announced a hard global deadline for the Model S and X, as after that date, only existing inventory will be available in South Korea.

The move to bring closure to the Model S and Model X aligns with CEO Elon Musk’s plans for Tesla moving forward. During the Q4 2025 Earnings Call in January, Musk said the two cars deserved an “honorable discharge” for what they have done for the company.

The long-running programs are primarily being removed so that manufacturing lines can be repurposed for high-volume manufacturing of the Optimus humanoid robot. Tesla is targeting a production rate of up to one million units each year.

The Model S and Model X being removed from Tesla’s plans is a tough choice, but it was one that was written on the wall. Sales of these premium models have declined sharply in recent years, and even with Plaid configurations that are performance-forward, the company still has had trouble getting them sold.

In 2025, the Model S and Model X together accounted for roughly 3 percent of Tesla’s global deliveries, down significantly from prior periods as competition intensified in the luxury EV segment and buyers shifted toward more affordable options like the Model 3 and Model Y.

The Model S saw sales drop over 50 percent year-over-year in some quarters, while the Model X faced similar pressures from rivals, including the Rivian R1S and BMW iX.

Despite their dwindling volume, the Model S and Model X remain technological showcases. The Plaid variants deliver blistering acceleration, advanced Full Self-Driving capability, and luxurious interiors.

The phase-out paves the way for Tesla’s strategic pivot toward autonomy, robotics, and higher-volume vehicles.

Tesla brings closure to flagship ‘sentimental’ models, Musk confirms

Fremont will continue producing the refreshed Model 3 and Model Y, ensuring the factory remains a key automotive hub while expanding into robotics. Tesla has stated that the shift is not expected to result in job losses and could increase headcount as Optimus production ramps up.

For Tesla fans, the sunset represents a bittersweet moment. The Model S, introduced in 2012, proved EVs could compete with luxury sedans, while the Falcon-wing-door Model X set new standards for family haulers. Owners can expect continued software support and service for years to come.

Many fans have pushed for the Model X to hang around due to its appeal for families.

With the two cars heading out, Tesla’s priority now becomes its future products, especially that of the Optimus robot, which is the main reason for the S/X platform’s conclusion.

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Tesla shows off mysterious vehicle at Giga Texas

The mysterious structure, partially unboxed amid construction materials, has sparked widespread speculation among Tesla enthusiasts and analysts. Many are convinced it is the long-rumored Model Y L, the extended-wheelbase variant already popular in China, now arriving in Texas for potential U.S. production.

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Credit: Joe Tegtmeyer | X

Tesla seemingly showed off a mysterious vehicle at Giga Texas, one that seems to be completely different than anything the company currently makes for the U.S. market.

The vehicle, which was spotted on the plant’s property, appears to be similar to the Model Y L that has not yet launched in North America, and is currently built at Gigafactory Shanghai in China.

Drone pilot Joe Tegtmeyer captured intriguing footage at Tesla’s Giga Texas on March 23, 2026, revealing what appears to be a large, blue plastic-wrapped vehicle body resting inside a wooden shipping crate outdoors.

The mysterious structure, partially unboxed amid construction materials, has sparked widespread speculation among Tesla enthusiasts and analysts. Many are convinced it is the long-rumored Model Y L, the extended-wheelbase variant already popular in China, now arriving in Texas for potential U.S. production.

The images show an elongated silhouette that stands out from standard Model Y bodies. Side-by-side comparisons shared in replies to Tegtmeyer’s post highlight key differences: the rear door extends farther over the wheel arch than on a regular Model Y, and the rear glass appears to run all the way to the spoiler lip without the metal trim seen on shorter versions.

One overlay analysis noted that the visible proportions align precisely with the Chinese-market Model Y L, which measures approximately 4.98 meters long with a 3.04-meter wheelbase, which is about seven inches longer overall than the standard Model Y sold in the U.S.

The vehicle is a bare “body-in-white” shell, typical of prototypes sent abroad for tooling validation and local manufacturing ramp-up. Tesla has already launched the six- and seven-seat Model Y L in China and other markets, where it offers roughly 10% more cargo space and greater family-friendly versatility.

This sighting fits Tesla’s broader strategy. Industry observers expect the company to localize Model Y L production at Giga Texas by mid-2026 to serve American families seeking extra room without stepping up to the larger Cybertruck or a future full-size SUV.

Bringing the design stateside could add tens of thousands of annual deliveries while leveraging existing Model Y lines. People have been adamant that they want the Model Y L in the U.S., especially as Tesla plans to fade the Model X, the company’s most ideal vehicle for large families, out of production in the near future.

Tesla Model Y lineup expansion signals an uncomfortable reality for consumers

While Tesla has made no official comment, the timing, amid Giga Texas expansion and steady Model Y output, suggests the mysterious crate is more than a random prototype.

If confirmed as the Model Y L, it marks another step in Tesla’s effort to refresh its bestselling SUV for global demand. The vehicle would perform exceptionally well in the U.S., and despite the company’s rather mute stance on bringing it to America, this might be the biggest hint to date that it could be on the way.

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