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SpaceX rolls next Starship to the launch pad nine days after midair explosion

Starship SN15 is headed to the launch pad nine days after SN11's midair explosion. (NASASpaceflight - bocachicagal)

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Update: Right on schedule, SpaceX has transported Starship serial number 15 (SN15) from its Boca Chica rocket factory to a launch and test site just down the road.

SN15’s pad arrival comes just nine days after Starship SN11 – the last in a batch of four first-generation prototypes – exploded in midair some 30 seconds before a planned landing. While minor, SN11’s midair failure was undoubtedly a step backward relative to Starship SN10, which (briefly) became the first full-size prototype to land in one piece less than a month prior. Both SN8, SN9, and SN10 made it further into their identical flight tests, leaving SN11 somewhat high and dry and putting extra pressure on Starship SN15.

After Starship SN8’s unexpectedly successful December 2020 test flight, in which the rocket made it just a dozen or so seconds away from soft landing after more than six minutes in flight, SpaceX made the decision to scrap Starship SN12 and kill SN13 and SN14 before assembly could begin. Effectively a gamble that SN8-SN11 would produce enough of a foundation for future testing to start off on, it’s hard to say if that gamble paid off.

All four Starship flights managed the extraordinary feat of more than four minutes of powered flight and spent two minutes free-falling like no rocket ever before them, but they also made it clear that both Raptor and autogenous pressurization (using gasified propellant to pressurize Starship’s tanks) are not quite mature enough for reliable launches and landings. Featuring “hundreds of improvements,” many of which were hopefully designed to tackle some of those shortcomings, it’ll be up to Starship SN15 to attempt to carry that torch forward – and, with any luck, further than any prototype before it.

After SpaceX unexpectedly used a Monday road closure to deliver its first custom-built rocket fuel tank, plans for the next Starship test campaign and launch have begun to solidify.

Most importantly, the initial schedule for Starship serial number 15’s (SN15) test campaign appears to be clear. As of Wednesday, April 7th, road closures filed by SpaceX suggest that the first of a new group of upgraded Starships will be transported from build site to launch pad as early as 11am-1:30pm CDT (UTC-5) on Thursday, April 8th. Once SN15 is installed on ‘Suborbital Pad A,’ SpaceX means to waste no time and has scheduled a 7am-12pm road closure on Friday.

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As usual, the weekend will once again be free of any testing or activity requiring road closures, but SpaceX has already cordoned off noon to 8pm on Monday and Tuesday (April 12/13) to continue putting its newest Starship prototype to the test.

SpaceX technicians and engineers work to put the finishing touches on the weld joining Starship SN15’s two halves and remove scaffolding ahead of the rocket’s trip to the launch pad. (NASASpaceflight – bocachicagal)

While road closure notices no longer offer any real detail, a few basic details can still be inferred. The April 7th closure, for example, warns that SpaceX only plans to intermittently close the highway but not Boca Chica Beach – implying that the window poses no threat to residents or beachgoers. Historically, that means that something will be transported – likely Starship SN15, in this case.

On Friday, SpaceX has scheduled a full five-hour closure of both the highway and beach, implying that some kind of testing is likely on the books. The same goes for Monday and Tuesday, but with longer eight-hour closures.

More likely than not, assuming Starship SN15’s pad transport and launch mount installation goes smoothly, SpaceX will use the shorter Friday window to complete a basic ambient pressure test – filling the rocket with ambient-temperature nitrogen gas to test its complex plumbing and propellant tanks for leaks. Continuing the IFF (if and only if) string, SpaceX will then spend the weekend preparing Starship SN15 for a cryogenic proof test and thrust structure stress test – simulating the thrust of three Raptors after loading the rocket with extremely cold liquid nitrogen (LN2).

SpaceX will then most likely spend another one or two days inspecting Starship SN15 and removing the hydraulic ram used to simulated thrust from the launch mount the ship is installed on. Once SN15 and its mount are cleared, SpaceX can move into static fire testing. Given that – according to CEO Elon Musk – SN15 will debut Raptor engines with an unknown degree of upgrades, it’s reasonable to assume that SpaceX will take things relatively slowly and possibly perform more than one static fire test even if the first attempt is a total success.

If not and SpaceX continues to push hard like it did with SN10 and SN11, it’s not out of the question that Starship SN15 will be ready for its first launch attempt around Friday, April 16th or Monday, April 19th. Stay tuned for updates as SpaceX hopefully rolls the rocket to its Boca Chica, Texas launch site later today.

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 tells the FCC that Starship Flight 14 is going to orbit

SpaceX filed with the FCC for Starship Flight 14, its first true orbital launch attempt.

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SpaceX has asked the Federal Communications Commission for permission to fly Starlink terminals during Starship’s fourteenth flight test, and the filing lays out a genuine trip to orbit, something the program has never attempted.

Every Starship flight so far, including Flight 13’s successful splashdown in the Indian Ocean on July 24, has flown a suborbital arc that ends with the ship reentering the atmosphere within the same hour it launches. The FCC paperwork describes a mission profile built around an actual orbital insertion instead.

The payload is the other half of the story. Flight 13 carried 20 production Starlink V3 satellites, but because that mission never reached orbit, the satellites reentered along with the ship rather than joining the constellation, something Teslarati covered in detail after SpaceX released footage shot from one of those satellites as it drifted away from Starship in space. Flight 14 is designed to close that gap. If the orbital insertion holds, the roughly 20 V3 satellites onboard would separate into an operational orbit and could eventually go into service, each one rated for about 1 terabit per second of downlink capacity by SpaceX’s own account.

SpaceX announces new Starbase for ‘thousands of Starship launches annually’

Elon Musk first flagged the orbital attempt during SpaceX’s August 4 earnings call, the company’s first as a public entity following its June IPO under the ticker SPCX. He also floated catching the ship with the Starbase tower on the same flight, an idea he walked back on August 20, saying the catch attempt would more likely come “in a few months,” as Teslarati reported at the time. Flight 14 will instead target a splashdown for the ship in the Indian Ocean, the same recovery method used since Flight 12.

Hardware has been catching up to the ambition. Booster 21 completed a full 33-engine static fire on August 28, and Ship 41 finished its own six-engine test the week before. An airspace briefing circulated to pilots on August 20 listed September 15 as the target date, later than the end of August window Musk mentioned on the earnings call, though SpaceX has not confirmed a launch date publicly and Starship schedules routinely slip while hardware and FAA paperwork line up.

The FCC filing itself does not guarantee a launch date. It covers communications authority, and not flight readiness, considering SpaceX still needs Ship 41 fully stacked and cleared by the FAA before Flight 14 can fly. But the filing is a real marker of intent and it puts a specific regulatory process behind what had so far only been Musk’s word on the earnings call.

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Tesla Cybercab Event: what to expect from Austin

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Credit: Tesla

Tesla is set to launch Cybercab on Thursday at an event in Austin, Texas, which will officially bring the company’s first steering wheel-less and pedal-less vehicle to a limited number of consumers for the first time.

The event, which is invite-only, is still thin on details: we’ll be there, and it seems the event will be held at Gigafactory Texas, but the launch of this vehicle truly relies on it being operational outside of the factory and on public roads.

Nevertheless, there are some big things to expect, and other things to temper expectations on. For what it’s worth, we believe this event could be perhaps the biggest indication that Tesla is ready to truly enter a new phase and chapter in its historic story.

Tesla Cybercab’s First Foray into the Public with Real-World Riders

Cybercab will likely hit the streets of Austin and the surrounding areas, likely in the established geofence that Tesla has expanded on for the past 14 months. Just yesterday, Tesla expanded it once again by 9 percent.

Tesla will put, for the first time, a vehicle without any manual controls on public roads, likely without any help from teleoperators. This is a truly groundbreaking development if it comes through in this fashion: it would be groundbreaking for Tesla to roll out a truly driverless ride-hailing vehicle.

Cybercab Has Already Been Unveiled

This is not an unveiling event. Cybercab has been released for nearly two years, as Tesla first showed it to the public on October 10, 2024.

FIRST LOOK: Tesla ‘Cybercab’ Robotaxi makes its global debut

While there is some small speculation that Tesla could release the Roadster at the event as a surprise, it seems more likely the focus will be on the Cybercab and the huge accomplishment that will come with releasing a vehicle with no manual controls.

There Will Be a Lot of Hype

What’s important to remember about the Cybercab event is that Tesla will continue to prioritize safety and the rollout will likely be slow, just as it has been with Robotaxi.

One of the biggest complaints about Robotaxi is vehicle population, and the fact that the wait for a ride, at least in some instances, has been longer than most want to admit.

Tesla Cybercab fleet grows in Austin ahead of launch event

It will take time for this project to truly scale. It will take time for Tesla to roll this out in a large fashion. The important thing to note is that they are doing it, and they’re doing it with a vehicle that is completely engineered and built internally. That’s something no other ride-hailing service can say.

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SpaceX would not exist if this crucial early launch failed, Musk says

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Credit: SpaceX

Elon Musk recently restated a fact that still defines SpaceX’s origin story: if Falcon 1’s fourth launch had failed, the company would not exist. The comment answered a reminder that after three consecutive losses, SpaceX had money for only one more attempt.

On X, Peter Diamandis said that the present-day acknowledgement of SpaceX’s success does not discount the rough start the company had. “Almost nobody remembers that Elon’s first rocket failed three times, and there was money for exactly only one more attempt.”

Musk said, “If the 4th launch had failed, SpaceX would not exist.”

In late 2008, the firm was nearly out of cash. Another failure would have ended payroll, closed the Hawthorne factory, and left the Falcon 9 and Dragon programs as unfinished drawings.

The first flight lifted off from Omelek Island on 24 March 2006. Thirty-three seconds later, a corroded aluminum fitting on a fuel line leaked. Kerosene ignited around the Merlin engine, control was lost, and the vehicle came apart. The small DARPA payload, FalconSAT-2, survived the short flight only to land on a storage shed near the pad. Investigators later traced the fitting to a materials mix-up that should never have reached the rocket.

Flight 2, on 21 March 2007, looked far better at first. The first stage burned cleanly and handed off to the Kestrel-powered upper stage. The vehicle crossed 100 kilometers and reached a peak of about 289 kilometers. Then propellant slosh in the second-stage tank started a circular coning motion that grew until the engine shut down. Telemetry faded as the stage tumbled, and SpaceX had reached space but not orbit. Over the next year, the team redesigned everything from the ground up, including tanks, baffles, and the new regeneratively cooled Merlin 1C.

That engine flew on Flight 3 on 2 August 2008. The first stage performed almost perfectly and reached 217 kilometers. After main-engine cutoff, leftover fuel in the cooling channels produced a faint residual thrust, roughly 10 pounds per square inch of chamber pressure. On a Texas test stand, the effect was invisible beneath ambient air pressure. In vacuum it was enough to push the spent first stage back into the second stage after separation. The stages collided, the upper stage spun, and the mission was lost. Musk later said a slightly longer delay before staging would have saved the flight.

Six weeks later, the team assembled Flight 4 from remaining parts and flew it on 28 September 2008 at 23:15 UTC. The payload was Ratsat, a 165-kilogram aluminum mass simulator built in-house. Staging was delayed so residual thrust could decay. The Kestrel ignited, the fairing split away, and nine and a half minutes after liftoff the vehicle was in orbit. After a coast, the second stage restarted, settling into a 621-by-643-kilometer path at 9.35 degrees inclination. Falcon 1 became the first privately developed liquid-fueled rocket to reach Earth orbit. Musk called the insertion “middle of the bull’s-eye.”

SpaceX restores a Falcon 1 rocket for 10th anniversary of first launch success

That success unlocked NASA’s Commercial Resupply Services award later that year. Without it, there would have been no Falcon 9, no reusable first stages, and no Dragon cargo or crew flights to the International Space Station. Launch prices would have remained far higher. Starlink’s constellation would not exist; broadband from low Earth orbit would still be a paper concept.

Ride-share markets, high launch cadence, and the current pace of lunar and Mars hardware would be years behind. Communications, Earth observation, and the cost of putting anything into space would look more like the 2000s than the 2020s.

One extra second of residual thrust in August 2008 would have written a different decade.

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