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SpaceX’s repaired Starship booster survives back-to-back cryoproof tests

Two cryoproofs; one booster; 48 hours. (NASASpaceflight Starbase Live)

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SpaceX’s upgraded Starship booster has completed a second and third cryogenic proof test in rapid succession after undergoing repairs to fix damage suffered during the first round of testing.

Testing began almost immediately after SpaceX rolled the repaired Super Heavy booster back to the orbital launch site (OLS) on May 6th. After a quick installation on the pad’s stool-like launch mount and another day of systems checks and integration, Booster 7 charged headfirst into its first post-repair cryoproof on May 9th.

Instead of cautiously feeling out the repaired plumbing and header tank over a series of small tests, SpaceX immediately performed a full cryogenic proof (cryoproof) and filled Booster 7 to the brim with about 3000 tons (~6.6M lb) of liquid nitrogen (LN2) or a combination of LN2 and liquid oxygen (LOx). Standing about 67 meters (~220 ft) tall and 9 meters (~30 ft) wide, it took about two hours to fully fill Super Heavy’s tanks with the equivalent of one and a half Olympic swimming pools of cryogenic liquid.

As always, that liquid (well below –320°F or –196°C) rapidly chilled the booster’s 4mm (~0.16″) thick steel tanks to cryogenic temperatures, which then froze moisture directly out of the humid Texas air, coating almost all of Super Heavy’s exterior with a layer of frost and ice.

A stitch of screenshots from NASASpaceflight’s live coverage of the third Super Heavy Booster 7 cryoproof on May 11th.

SpaceX began detanking Booster 7 soon after the fill process was completed. Thanks to plenty of insulated plumbing and well-insulated ground storage tanks, SpaceX is able to recover nearly all of the LN2 and LOx used during cryoproof testing, which helps avoid the hundreds of semi-truck delivers that would otherwise be required to replenish the tank farm after even a single test.

As if to demonstrate that, SpaceX proceeded to put Booster 7 through a whole new cryogenic proof test just two days later, on May 11th. Once again, Super Heavy was fully loaded with thousands of tons of liquid nitrogen and oxygen. Unlike Cryoproof #2’s immediate detank, SpaceX – judging by the frost levels – kept Booster 7 topped off for a good hour before detanking.

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In a last-minute surprise, after fully detanking B7 at the end of Cryoproof #3, SpaceX refilled the booster’s liquid oxygen tank with a few hundred tons of LN2 or LOx. Once the rocket’s thrust section reached some degree of thermodynamic equilibrium, SpaceX remotely retracted and reconnected the orbital launch mount’s Super Heavy umbilical. The launch mount umbilical or ‘quick disconnect’ is responsible for connecting Super Heavy to the pad’s gas supplies, propellant storage, power, and communications. The test SpaceX completed after Cryoproof #3 may have been a rough simulation of one scenario Starship could easily face: a post-ignition launch abort. In other words, if an orbital Starship launch was aborted just before liftoff but after quick-disconnect retraction, could it quickly reconnect to the booster with zero human intervention?

In a scenario where a QD failed to reattach to a fully-fueled Super Heavy after a launch abort, the odds of a catastrophic fire or explosion would immediately shoot up to near-certainty. In moderate quantities, simultaneously venting gaseous methane and oxygen from the same rocket is risky but manageable. Venting hundreds – let alone thousands – of tons while trapped on the ground would amount to creating a multi-hour fuel-air bomb just waiting for a spark. Multiple Starship prototypes (SN4, SN10) have already been destroyed in part by the flammability of methane gas.

Booster 7 and the orbital launch mount quick disconnect. (NASASpaceflight – bocachicagal)
Starship SN4 exploded catastrophically after a leak developed around its umbilical panel.

Combined with the completion of two full cryogenic proof tests in less than two days, it appears that Super Heavy B7’s repairs were extremely successful. Had the first post-repair cryoproof not gone more or less perfectly, it’s hard to imagine that SpaceX would have attempted or completed an almost identical test two days later. If the second cryoproof hadn’t been nearly perfect, it’s even harder to imagine that SpaceX would have accepted the risk involved in detaching Booster 7’s umbilical during the same test window.

On May 12th, SpaceX’s main pad crane attached a lift jig to Super Heavy B7, implying that it will likely be removed from the orbital launch mount in the near future. If the repaired booster aced its tests, SpaceX’s next step would likely be Raptor engine installation and the start of static fire testing. It’s unclear if SpaceX wants to install all 33 engines at once or begin with a small handful. It’s also unclear if SpaceX will return Booster 7 to Starbase’s production facilities to finish Raptor, heat shield, grid fin, and aerocover installation.

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 flexes its most impressive and longest Full Self-Driving demo yet

Tesla is flexing a lengthy Full Self-Driving demo from San Francisco to Los Angeles.

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tesla full self-driving demo from san francisco to los angeles
Credit: Tesla

Tesla its most impressive and longest demo of the Full Self-Driving suite, showing a zero-intervention trek from the San Francisco Bay Area to Los Angeles. The drive required no interventions from the vehicle operator, the video showed.

It also included a quick Supercharging stop about two-thirds of the way in.

Tesla has been extremely confident in the performance of the FSD suite since releasing it years ago. However, with improvements in data comprehension and storage with its neural nets, as well as a more refined Hardware system, FSD has made significant strides over the last year.

I took a Tesla Model Y weekend-long Demo Drive – Here’s what I learned

Tesla’s prowess with driving tech has established the company as one of the industry leaders.

In a new video released on Tuesday, Tesla showed a drive of roughly 360 miles from San Francisco to Los Angeles, a trek of about six-and-a-half hours, with zero interventions using Full Self-Driving:

Full Self-Driving is not fully autonomous, but it does operate under what Tesla calls “Supervised” conditions. This means that the driver does not have to have their hands on the wheel, nor do they have to control the accelerator or brake.

Instead, Tesla’s internal cabin-facing camera tracks eye movement to ensure the driver is ready to take over at any time and is paying attention.

The version of FSD used in this example is likely the version that the public has access to; the only differentiating factor would be the Hardware version, as older vehicles do not have HW4.

With Tesla’s Robotaxi suite in Austin operating since late June, the company stated that those vehicles are using a version that is not yet available to the public. It does not require anyone to be in the driver’s seat, which is how the vehicles are able to operate without anyone in the driver’s seat.

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Elon Musk’s new $29B Tesla stock award gets strange synopsis from governance firm

Did CGI not realize that Tesla Shareholders supported Musk being paid not once, but twice?

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elon musk speaking
Credit: TED

Elon Musk was recently awarded around $29 billion in Tesla stock as the company’s Board of Directors is attempting to get its CEO paid after his original pay package was denied twice by the Delaware Chancery Court.

But a new and strange synopsis from the Corporate Governance Institute (CGI) says the award is potentially a strength move to “endorse the will of a powerful CEO.” The problem is, in the same sentence, the firm said the new award brings up a “question of whether the board exists to steward a company in the interests of all stakeholders.”

The problem with their new analysis of Musk’s pay package is that shareholders voted twice on Musk’s original pay package of $56 billion. They voted to give Musk that sum on two separate occasions.

Musk’s original $56 billion pay package was approved by shareholders twice; once in 2018 and once again last year. Last year’s vote was in response to Delaware Chancery Court Kathaleen McCormick’s decision to revoke the “unfathomable sum” from Musk.

Shareholders still showed support for Musk getting paid. Tesla said in its new award to the CEO that this is a way to give him compensation for the first time in seven years.

CGI said in its note (via TipRanks):

“When a board builds its strategy around a single individual, it creates a concentration risk, not just operationally, but culturally and ethically. If that individual becomes a source of volatility, the company becomes fragile by design.”

What’s strange with this type of narrative is the fact that Tesla’s valuation has skyrocketed with Musk at the helm. Go back to 2020, and the stock is up over 200 percent. Since Musk’s $56 billion pay package was introduced in 2018, shares are up well over 1,000 percent.

Tesla engineer explains why Elon Musk deserves new pay package

Musk’s 2018 pay package was also not awarded to him without performance-based incentives. He was required to reach certain growth goals, all of which were accomplished through the launch of new vehicles and the advancements of its driver-assistance suites, like Autopilot and Full Self-Driving.

It is tough to agree with CGI’s perception of Musk’s new pay plan, especially as it is much less than what shareholders voted on twice. Musk deserves to be paid for his contributions to Tesla.

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Tesla Robotaxi is headed to New York City, but one thing is in its way

Tesla is working to hire Vehicle Operators in New York City, but the company still needs some regulatory hurdles to go through.

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tesla store in New York City
Credit: Tesla

Tesla Robotaxi will be headed to New York City, but there is one huge thing that stands in its way: approval to test autonomous vehicles.

Tesla is expanding its Robotaxi platform across the United States as it currently operates in Austin, Texas, and the Bay Area of California.

The company has also been seeking approvals in several other states, including Nevada, Arizona, and Florida.

However, the company is also working to expand to major metropolitan areas across the U.S. that it has not explicitly mentioned, as it attempts to reach CEO Elon Musk’s goal of giving half of the country’s population access to the platform by the end of the year:

It appears New York City is next on the list, according to a job posting on Tesla’s Careers website.

The company says it is hiring a Vehicle Operator for Autopilot in Flushing, New York, a section of the borough of Queens. Queens is connected to Brooklyn and Long Island, so it seems more ideal than launching in Manhattan or the Bronx, where traffic is heavy and charging is not as readily available.

Tesla’s job posting states:

“We are looking for a highly motivated self-starter to join our vehicle data collection team. As a Prototype Vehicle Operator, you will be responsible for driving an engineering vehicle for extended periods, conducting dynamic audio and camera data collection for testing and training purposes. Access to the data collected is limited to the applicable development team. This role requires a high level of flexibility, strong attention to detail, excellent driving skills, and the ability to thrive in a fast-paced, dynamic environment.”

It also lists the hours of operation as Tuesday through Saturday or Sunday through Thursday, with its three shifts listed as:

  • Day Shift: 6:00 AM – 2:30 PM or 8:00 AM – 4:30 PM
  • Afternoon Shift: 2:00 PM – 10:30 PM or 4:00 PM – 12:30 AM
  • Night Shift: 10:00 PM-6:30 AM or 12:00 AM-8:30 AM

We wouldn’t count on New York City being the next place Tesla launches Robotaxi. According to a report from CNBC, a spokesperson for the NYC Department of Transportation confirmed Tesla has not yet applied for permits that are needed to operate its ride-hailing service.

For what it’s worth, it could just be the first step in Tesla’s plans. It also has Vehicle Operator job postings in other regions. Houston, Texas, as well as Tampa, Miami, and Clermont, Florida, are all listed on Tesla’s Career postings.

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