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SpaceX rolls largest rocket booster ever built to the launch pad

SpaceX has officially completed the first functional prototype of Super Heavy, now the largest rocket booster ever. (Starship Gazer)

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4 years ago

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Six weeks after assembly began, SpaceX has completed Starship’s first true Super Heavy booster prototype, rolled it out of its ‘high bay’ nest, and installed the building-sized rocket at the launch pad.

Standing some 65 meters (~215 ft) tall, Super Heavy Booster 3 (B3) is the same height as an entire two-stage Falcon rocket and Dragon spacecraft and is expected to singlehandedly weigh six times more than a fully-fueled Falcon 9 when loaded with liquid oxygen and methane propellant. Once Super Heavies are eventually outfitted with a full 32 Raptors, more engines than any other rocket in history, the booster will also produce more than twice the thrust of NASA’s Saturn V Moon rocket – still the most powerful vehicle ever successfully flown.

Assembled out of 36 steel rings, three tank domes, and dozens of other major components, Super Heavy B3 borrows heavily from the Starship production apparatus SpaceX has built and refined over the last ~18 months. Boosters use the same welding and integration jigs, facilities, and strategies and are built out of the same steel rings, stringers, stiffeners, and dome ‘gores.’

In some ways, Super Heavy boosters are actually a good deal simpler than Starships, which require a custom nose cone, secondary ‘header’ tanks, extra plumbing, actuating flaps, a heat shield with thousands of tiles, and more. Boosters, by comparison, require no heat shield and only need two main tanks made out of identical steel rings. However, all three Super Heavy domes (forward, common, and thrust) are mostly custom or require major modifications on top of parts shared with Starship domes.

A panorama of Super Heavy Booster 3, now the largest rocket stage in the world. (Starship Gazer)

Speaking on June 30th, Elon Musk revealed that Booster 3 was “very hard to build” and would be exclusively used for ground tests, reiterating that Super Heavy B4 is currently the first booster scheduled to fly. Curiously, the SpaceX CEO also said that “much of [Super Heavy’s] design” would be changed between Booster 3 and Booster 4, raising questions about what the company hopes to gain from Booster 3 “ground tests.”

Regardless, those tests are now on track to begin as early as Monday, July 6th after SpaceX transported Super Heavy Booster 3 from the factory to the launch pad and rapidly installed the rocket on a test platform on July 1st. Following in the footsteps of Starship, Super Heavy’s first hurdle will likely be an ambient proof test, in which nitrogen gas is used to check for leaks and verify general structural integrity under pressure.

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Once complete, Booster 3 will be put through a cryogenic proof test, effectively replacing gaseous nitrogen with its supercooled liquid equivalent to simulate the immense thermal and mechanical stress incurred by similarly cold liquid oxygen and methane propellant. How exactly that test will be done is unclear given that Super Heavy can feasibly hold more than 3100 tons of liquid nitrogen and nowhere near that much storage capacity has been installed. The most important goal of cryo proof testing is to demonstrate that Super Heavy is structurally sound with its tanks pressurized to nominal flight pressures – likely at least 7-8 bar (~100-120 psi).

If successful, there are two possible routes SpaceX could go: more cryogenic proof testing at higher (and thus potentially destructive) pressures or static fire testing with one or several Raptor engines installed. Given Musk’s statement that the first flightworthy Super Heavy booster would implement major design changes, it’s unclear if Booster 3 is of a high enough fidelity to warrant static fire testing or if SpaceX has effectively turned the Super Heavy prototype into a massive ‘test tank’ instead.

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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’s Elon Musk considers insane Cybertruck mod: ‘Maybe we should make this’

The Cybertruck won’t do what the video shows (at least not in our lifetime), but a very entry-level version of it could be developed.

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16 hours ago

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August 19, 2025

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Credit: Cybertruck | X

Tesla CEO Elon Musk has teased what could potentially be the company’s next big project, and while it is likely many, many years away, it shows the company truly has its sights set on the craziest things the world has seen.

Musk shared a video created by Grok Imagine, the AI tool that is able to take images and turn them into videos, showing a Cybertruck flying above the clouds and buildings of what appears to be a very futuristic city.

There are also massive robots roaming around in the video, so it is obviously an illustration of what life could look like in several generations.

However, Musk, who does not shy away from some really optimistic projects and goals, shared the video on X and said, “Maybe Tesla should make this.”

What is depicted in the video is not what we’d see Tesla create anytime soon. However, the company could potentially engineer something to make the Cybertruck hover, as it plans to do with the Roadster.

Of course, this is likely a huge “if” considering the current state of the car industry. Vehicles are becoming more advanced with every passing day as companies like Tesla, Waymo, and others are working to sort out things like autonomous and driverless travel.

Tesla has been working on somewhat of a similar idea with the Roadster, a vehicle that has been delayed on several occasions because of Musk’s spectacular imagination. Earlier this year, Tesla’s Chief Designer, Franz von Holzhausen, revealed Musk wanted to push the limits of that vehicle even more.

The new Tesla Roadster will be able to fly: Elon Musk

It seems it could be on the way soon, considering Tesla has teased an “epic” demo for the car, which could come before the end of the year.

Tesla has been working to make the Roadster hover, using SpaceX cold gas thrusters. It will also utilize these for what could be an incredibly fast 1.1-second 0-60 MPH acceleration rate that has been teased countless times.

This project that Musk is teasing with the Cybertruck is likely one that we will not see in our lifetimes. However, this is just one example of the outlandish ideas Musk continues to tease for Tesla in the future.

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Tesla Model Y L addresses one huge complaint from many owners

If you have ever used a wireless charger inside a Tesla or almost any vehicle, for that matter, you will notice that your phone will charge slowly, and it will get extremely hot. This is mostly due to the inherent inefficiency of electromagnetic induction, which is the process that wireless chargers use to transfer energy to the phone.

Published

19 hours ago

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August 19, 2025

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The new Tesla Model Y L is officially launching in China at a great price and with all of the awesome features of the original model, but with more space. The vehicle is also addressing one huge complaint that many owners have discussed.

The new Model Y L features a more spacious interior, new front seats with adjustable headrests, captains chairs, and mechanical armrests in the second row, and B Pillar air vents for improved circulation.

Tesla Model Y L officially launched: price, features, and more

However, there are some other features that are flying under the radar, including one that addresses a common complaint of many Tesla owners: wireless charging.

If you have ever used a wireless charger inside a Tesla or almost any vehicle, for that matter, you will notice that your phone will charge slowly, and it will get extremely hot. This is mostly due to the inherent inefficiency of electromagnetic induction, which is the process that wireless chargers use to transfer energy to the phone.

The inefficiency is evident in the heat, as that is the lost energy that should be going to the phone, but does not.

To combat this problem, Tesla has rolled out a new feature with the wireless charging mat in the Model Y L.

Tesla has used small slit air vents in the center of the wireless charger, which separates the two pads, to blow cool air on the phones to prevent overheating:

This will keep the temperature of your phone down and could prevent the dreaded “iPhone too hot” message that deems your device unusable until it reaches a more stable temperature.

Additionally, Tesla has upgraded the driver’s side wireless charger to support 50W charging speeds. The passenger charger remains at 30W.

This is a small but valuable improvement to the wireless charging apparatus could be a game changer, as there have been so many complaints about this feature in other Tesla vehicles.

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Tesla Model Y Performance zips around Nurburgring with new features

With the performance, there are some improvements to interior aesthetics, but the goal with this particular trim of Tesla vehicles is to improve performance and aerodynamics, bringing a truly first-class experience to one of the best and fastest vehicles on the road.

Published

20 hours ago

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August 19, 2025

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Credit: Wilco Blok on Instagram

The long-awaited Tesla Model Y Performance has been spotted zipping around the famed Nurburgring in Germany, a popular location for new vehicles to test their limits ahead of public release.

Earlier this year, Tesla executives Franz von Holzhausen and Lars Moravy both indicated that the updated and upgraded Model Y Performance would be on its way by the end of 2025, and it appears that time is coming close.

New images captured by Wilco Blok and Teslaplaidtokde on X show the Model Y Performance wrapped in camouflage, sporting a handful of new features as the lightning-fast version of the world’s best-selling vehicle prepares for a launch in various markets across the world:

New Features

According to Blok and Teslaplaidtokde, the new Model Y Performance will feature a variety of new improvements compared to the past version.

This is something that was expected, as the launch of the new Model Y over the past year has shown various changes that made a great vehicle even better.

With the performance, there are some improvements to interior aesthetics, but the goal with this particular trim of Tesla vehicles is to improve performance and aerodynamics, bringing a truly first-class experience to one of the best and fastest vehicles on the road.

 

View this post on Instagram

 

A post shared by ᴡɪʟᴄᴏ ʙʟᴏᴋ (@wilcoblok)

Here’s what was mentioned as changes so far that have been seen on this test mule at Nurburgring:

  • New 21″ wheels
  • All black headliner, a big change that was included in the Model Y L, the first time a Model Y has had that option
  • Updated brakes
  • Bucket seats that appear to be similar to the new Model Y L in China
  • New Carbon Fiber Spoiler
  • Performance Badging
  • Changes to both the front and rear bumper
  • Suspension with Adaptive Dampers

 

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A post shared by ᴡɪʟᴄᴏ ʙʟᴏᴋ (@wilcoblok)

Expected Performance Metrics

These are not official figures, but this is what is expected based on what has been seen at the Nurburgring:

  • 510 horsepower
  • 0-60 MPH in 3.2-3.4 seconds
  • 280-290 miles of range
  • Anticipating the release of a new Track Mode

The previous iteration of the Model Y Performance featured 503 horsepower and a 0-60 MPH of 3.5 seconds. It also had a top speed of 155, which we believe will be improved with the next version of the Y Performance.

Here is some footage of the Model Y Performance running around the Nurburgring ahead of its release:

Tesla has not yet listed any date or timeframe for the Performance variant to be released. However, it is anticipated to be released by the end of 2025.

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