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SpaceX testing ceramic Starship heat shield tiles on flight-proven CRS-18 Cargo Dragon

SpaceX says a handful of Starship heat shield tiles will be tested on Cargo Dragon's own heat shield during the spacecraft's CRS-18 mission. (SpaceX)

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SpaceX announced during its CRS-18 Cargo Dragon webcast that the twice-flown orbital spacecraft will feature a handful of ceramic Starship heat shield tiles, meant to flight-test a critical component of the next-generation SpaceX spacecraft.

Extremely unfavorable weather forced SpaceX to scrub today’s scheduled CRS-18 launch around T-30 seconds to liftoff and tomorrow’s backup window (July 25th) doesn’t look any better. Nevertheless, whenever central Florida’s weather chooses to cooperate, the flight-proven Cargo Dragon capsule (C108) will be carrying a little piece of its successor along for the ride, a particularly fitting flight test given that the capsule will also become the first commercial spacecraft to launch to orbit three times.

Although Cargo Dragon’s reusability milestone is an undoubtedly impressive achievement, Starship must necessarily make the spacecraft’s third trip to orbit look like child’s play if it is to realize SpaceX’s dream of radically lowering the cost of spaceflight. To do so, Starship and Super Heavy will need to be the most easily reusable spacecraft and boosters ever built and flown by a nearly infinite margin, given that the ultimate goal is to require little more than careful inspections between suborbital booster launches and orbital Starship launches and reentries.

To accomplish that incredible feat, SpaceX will need to develop, test, and mass-produce thermal protection systems (including heat shields) that are more effective than anything that has flown in space. This is where Cargo Dragon (Dragon 1) and Crew Dragon come into play.

Cargo Dragon C113 bares its scorched heat shield after returning to port on June 4th, following its successful CRS-17 mission. (Pauline Acalin)
Crew Dragon C201 displays its heat shield after the spacecraft’s first orbital-velocity Earth reentry, March 8th. (NASA/Cory Huston)

Although this Starship heat shield test comes as a surprise, it’s just a logical extrapolation of SpaceX’s tendency to flight-test hardware in retrospect. SpaceX’s routine and regular Cargo Dragon launches offer an obviously invaluable platform for the company to test new technologies both in orbit and reentry conditions. In fact, SpaceX is the only entity – government or commercial – with a reusable spacecraft capable of returning appreciable amounts of cargo from space to Earth’s surface.

If Cargo Dragon capsule C108 continues its successful record of orbital missions and recoveries, SpaceX will be able to recover Starship’s prototype ceramic heat shield tiles perfectly intact and thus have access to orbit- and reentry-tested hardware that should provide invaluable data for Starship. It’s unclear where exactly ceramic heat shielding would be used on Starship or if this means that the spacecraft’s transpirationally-cooled steel tiles did not pass muster, but CEO Elon Musk will hopefully provide additional details in a presentation later this month or early next.

Of note, the Starship heat shield test tiles appear to be installed near what is effectively the leading edge and thus the most stressed section of the heat shield. Ultimately, it’s extremely impressive that NASA has accepted this significant modification and concluded – alongside SpaceX – that the added risk of the prototype tiles is near-zero.

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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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Tesla Q1 Earnings: What Elon Musk and Co. will answer during the call

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Credit: Tesla

Tesla (NASDAQ: TSLA) is set to hold its Earnings Call for the first quarter of 2026 on Wednesday, and there are a lot of interesting things that are swirling around in terms of speculation from investors.

With the company’s executives, including CEO Elon Musk, answering a handful of questions that investors submit through the Say platform, fans want to know a lot of things about a lot of things.

These five questions come from Retail Investors, who are normal, everyday shareholders:

  1. When will we have the Optimus v3 reveal? When will Optimus production start, since we ended the Model S and Model X production earlier than mid-year? What’s the expected Optimus production rate exiting this year? What are the initial targeted skills?
  2. What milestones are you targeting for unsupervised FSD and Robotaxi expansion beyond Austin this year, and how will that drive recurring revenue?
  3. How will Hardware 3 cars reach Unsupervised Full Self-Driving?
  4. When do you expect Unsupervised Full Self-Driving to reach customer cars?
  5. When will Robotaxi expand past its current limited rollout?

Additionally, these are currently the three questions that are slated to be answered by Institutional Firms, which also answer a handful of questions during the call:

  1. Now that FSD has been approved in the Netherlands and is expected to launch across Europe this summer, can you discuss your Robotaxi strategy for the region?
  2. What enabled you to finish the AI5 tapeout early and were there any changes to the original vision? Last week, Elon said AI5 will go into Optimus and the Supercomputer, but one month ago said it would go into the Robotaxi. Has AI5 been dropped from the vehicle roadmap?
  3. Given the recent NHTSA incident filings, can you update us on the Robotaxi safety data? If safety validation remains the primary bottleneck, why not deploy thousands of vehicles to accelerate the removal of the safety driver?

The questions range through every current Tesla project, including FSD expansion and Optimus. However, many of the answers we will get will likely be repetitive answers we’ve heard in the past.

This is especially pertinent when the questions about when Unsupervised FSD will reach customer cars: we know Musk will say that it will happen this year. Is Tesla capable of that? Maybe. But a more transparent answer that is more revealing of a true timeline would be appreciated.

Hardware 3 owners are anxiously awaiting the arrival of FSD v14 Lite, which was promised to them last year for a release sometime this year.

The Earnings Call is set to take place on Wednesday at market close.

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Elon Musk reveals shocking Tesla Optimus patent detail

What looked promising on paper and in simulations failed to deliver the reliability required for a robot expected to handle delicate tasks like folding laundry, assembling electronics, or assisting in factories and homes.

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Credit: Tesla

Elon Musk revealed a shocking detail on the Tesla Optimus patent that was revealed last week. Despite it being made public for the first time, Musk said the company has already moved on from the design, an incredible truth about the development of new technology: things move fast.

Musk dropped a bombshell about the Tesla Optimus humanoid robot hand patent that was released last week. Musk, candidly replying to a post late at night on X, revealed that what is a new technology to many fans and insiders is actually old news to those developing the tech directly.

“We already changed the design,” Musk said. “This one didn’t actually work.”

Patents, after all, are often viewed as blueprints for future products. Yet Musk revealed that the rolling contact mechanism—intended to provide smooth, low-friction articulation in the fingers—had already been scrapped after real-world testing exposed its shortcomings.

What looked promising on paper and in simulations failed to deliver the reliability required for a robot expected to handle delicate tasks like folding laundry, assembling electronics, or assisting in factories and homes.

The hand has been one of the biggest challenges for Tesla engineers since Optimus development started years ago. Musk has said that there is not enough recognition for how incredible and useful the human hand is, and designing one for a humanoid robot has been the biggest challenge of all.

Tesla is stumped on how to engineer this Optimus part, but they’re close

This moment underscores the persistent engineering hurdles in achieving reliable humanoid hand dexterity. Human fingers are marvels of evolution: 27 bones, intricate tendons, ligaments, and a network of sensors working in perfect harmony. Replicating that in metal and silicon is extraordinarily difficult.

Rolling contacts promised reduced wear and precise motion, but testing likely revealed issues with durability under repeated stress, grip stability on varied surfaces, or the micro-precision needed for fine motor skills.

These aren’t minor tweaks, but instead they represent fundamental challenges that have plagued robotics teams for decades. Even advanced competitors struggle here—hands remain the Achilles’ heel of most humanoids because the margin for error is razor-thin.

A fraction of a millimeter off, and a robot drops a glass or fails to button a shirt.

What makes Musk’s reply remarkable is how it signals Tesla’s direct communication style on prototype limitations. While many companies guard failures behind glossy marketing and vague timelines, Tesla openly shares setbacks.

Musk was forthcoming about the failure of this recent design. This transparency builds trust with investors, engineers, and fans. It shows Tesla treats Optimus development like true science: rapid iteration, rigorous testing, and zero tolerance for hype that doesn’t match reality.

The disclosure from Musk also highlights Tesla’s blistering pace of development. By the time the patents are published, which is often over a year after the initial filing, the technology has already evolved.

Optimus is far from a static product, and it’s a living project advancing weekly.

In the high-stakes race for general-purpose robots, Tesla’s approach stands out. Admitting a finger-joint design “didn’t actually work” isn’t a weakness—it’s confidence.

True innovation demands confronting failure head-on, and Musk just reminded the world that Optimus is being engineered that way. The next version of those hands is already in testing, and it will be better because Tesla isn’t afraid to say what didn’t work.

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Tesla is sending its humanoid Optimus robot to the Boston Marathon

Tesla’s Optimus robot is heading to the Boston Marathon finish line

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Tesla’s Optimus humanoid robot will be stationed at the Tesla showroom at 888 Boylston Street in Boston, right along the final stretch of the Boston Marathon today, ready to cheer on runners and pose for photos with spectators.

According to a Tesla email shared by content creator Sawyer Merritt on X, Optimus will be at the Boston Boylston Street showroom on April 20, coinciding with Marathon Monday weekend. The Boston Marathon finishes on Boylston Street, and the surrounding area draws hundreds of thousands of spectators along with international broadcast coverage. Placing Optimus there puts it in front of a massive public audience at zero advertising cost.

The Tesla showroom is at 888 Boylston Street, between Gloucester Street and Fairfield Street. The final mile of the marathon runs directly along Boylston Street, with runners passing the big stores before reaching the finish line at Copley Square.

Optimus was first announced at Tesla’s AI Day event on August 19, 2021, when Elon Musk presented a vision for a general-purpose robot designed to take on dangerous, repetitive, and unwanted tasks. In March 2026, Optimus appeared at the Appliance and Electronics World Expo in Shanghai, where on-site staff stated that mass production of the robot could begin by the end of 2026. Before that, it showed up at the Tesla Hollywood Diner opening in July 2025 and at a Miami showroom event in December 2025.

Tesla’s well-calculated display of Optimus gives the public a low-pressure first encounter with a robot that Tesla is preparing  to soon deploy at scale. The company has previously indicated plans to manufacture Optimus robots at its Fremont facility at up to 1 million units annually, with an Optimus production line at Gigafactory Texas targeting 10 million units per year.

Tesla showcases Optimus humanoid robot at AWE 2026 in Shanghai

Musk has said that Optimus “has the potential to be more significant than the vehicle business over time,” and separately that roughly 80 percent of Tesla’s future value will come from the robot program. Whether that holds depends on production execution. For now, Boston gets a preview of what that future looks like, standing at the finish line on Boylston Street while 32,000 runners pass by.

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