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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.

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.

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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.

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.

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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 sends clear message to Waymo with latest Austin Robotaxi move

It is the first expansion Tesla has made in Austin since the one on August 26. The company still operates in the Bay Area of California as well, referring to that program specifically as a “ride-hailing service.”

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4 hours ago

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October 28, 2025

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Credit: Tesla

Tesla has sent a clear message to Waymo with its latest move to its Robotaxi program in Austin, Texas.

Tesla and Waymo are the two true leaders in autonomous ride-hailing to an extent. Tesla has what many believe is a lot of potential due to its prowess with the Supervised Full Self-Driving suite. It is also operating a driverless Robotaxi service in Austin with a “Safety Monitor” that sits in the passenger’s seat.

Tesla explains why Robotaxis now have safety monitors in the driver’s seat

The two companies have been competing heavily in the market since they both launched driverless ride-hailing services in Austin this year: Waymo’s in March and Tesla’s in June.

One of the main drivers in the competition between the two is service area size, or the geofence in which the cars will operate without a driver. In August, the two were tied with a service area of about 90 square miles (233.099 sq. km).

Tesla then expanded to about 170 square miles (440.298 sq. km) on August 26, dwarfing Waymo’s service area and expanding to freeways. Tesla’s freeway operation of the Robotaxi suite requires the Safety Monitor to be in the driver’s seat for safety reasons.

On Tuesday evening, Tesla made another move that sent a clear message to Waymo, as it expanded once again, this time to 243 square miles (629.367 sq. km).

This is according to Robotracker:

It is the first expansion Tesla has made in Austin since the one on August 26. The company still operates in the Bay Area of California as well, referring to that program specifically as a “ride-hailing service.”

Yesterday, it expanded that service to the San Jose Mineta International Airport, something it has been working on for several months.

Waymo has its own set of distinct advantages over Tesla as well, as it operates in more cities and states than the EV maker. Waymo currently has its autonomous vehicle services in Phoenix, Arizona, San Francisco, Los Angeles, Austin, and Atlanta, Georgia.

Tesla plans to have half of the U.S. population with access to the Robotaxi platform by the end of the year.

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Tesla exec reveals shock development with Cybercab

“If we have to have a steering wheel, it can have a steering wheel and pedals.”

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14 hours ago

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October 28, 2025

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(Credit: Teslarati)

Tesla is planning to launch the Cybercab in the second quarter of next year, and it is designed to be fully autonomous, so much so that the company is planning to build it without a steering wheel or pedals.

However, a Tesla executive said today that the company could ditch that idea altogether in what would be a major shift from the plans the company, and especially its CEO Elon Musk, have announced for the Cybercab.

Earlier today, Robyn Denholm, the company’s Chair for the Board of Directors, revealed that Tesla would potentially switch up its plans for the Cybercab based on potential regulatory requirements.

Credit: Tesla Europe & Middle East | X

Currently, even autonomous vehicles that operate for companies like Tesla and Waymo are required to have steering wheels and pedals. From a regulatory perspective, this could halt the plans Tesla has for Cybercab.

Denholm said in an interview with Bloomberg:

“If we have to have a steering wheel, it can have a steering wheel and pedals.”

Interestingly, Musk and Tesla have not veered away from the idea that the vehicle will be without these operational must-haves.

Since the vehicle was revealed last October at the We, Robot event in Los Angeles, Tesla has maintained that the car would be built without a steering wheel or pedals, and would equip two seats, which is what is statistically most popular in ride-sharing, as the vast majority of rides have only one or two passengers.

Musk doubled down on the plans for Cybercab as recently as last week, when he said:

“That’s really a vehicle that’s optimized for full autonomy. It, in fact, does not have a steering wheel or pedals and is really an enduring optimization on minimizing cost per mile for fully considered cost per mile of operation. For our other vehicles, they still have a little bit of the horse carriage thing going on where, obviously, if you’ve got steering wheels and pedals and you’re designing a car that people might want to go very direct past acceleration and tight cornering, like high-performance cars, then you’re going to design a different car than one that is optimized for a comfortable ride and doesn’t expect to go past sort of 85 or 90 miles an hour.”

Cybercab is fully conceptualized as a vehicle that has zero need for pedals or a steering wheel because it is aimed toward being fully reliant on a Level 5 autonomous platform.

Tesla is ramping its hiring for Cybercab vehicle manufacturing roles

Regulators could get in the way of this, however, and although the car could drive itself and be a great solution for ride-hailing, it might need to have these controls to hit the road in the future.

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SpaceX opens up free Starlink service for those impacted by Hurricane Melissa

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16 hours ago

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October 28, 2025

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(Credit: Starlink | X)

SpaceX is opening up its internet service, Starlink, to those impacted by Hurricane Melissa, as it made landfall in Jamaica and the Bahamas as a Category 5 storm.

Hurricane Melissa is expected to reach wind speeds of over 165 MPH over the next few days as it extends out into the Atlantic Ocean by Thursday and Friday.

Citizens in Jamaica and the Bahamas have been preparing for the storm for the past week, getting necessary goods together and preparing for the massive storm to arrive. It finally did yesterday, and the first images and video of the storm are showing that it could destroy many parts of both countries.

Starlink is now being opened up for free until the end of November for those impacted by the storm in Jamaica and the Bahamas, SpaceX announced today:

It is a move similar to the one the company made last year as Hurricane Helene made its way through the United States, destroying homes and property across the East Coast. SpaceX offered free service for those impacted by the destruction caused by the storm.

The free Starlink service was available until the end of 2024.

Elon Musk’s companies have also made similar moves to help out those who are impacted by natural disasters. Tesla has offered Free Supercharging in the past, most notably during the California wildfires.

Tesla and SpaceX’s LA fire relief efforts: Cybertrucks, free Starlink and more

One major advantage of Starlink is that it is available for use in situations like this one, where power might be required to operate things like a modem and router.

Internet access is a crucial part of survival in these situations, especially as it can be the last leg some stand on to get in touch with emergency services or loved ones.

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