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Elon Musk says SpaceX making good progress on Starship’s upgraded Raptor 2 engines

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4 years ago

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As is routine, SpaceX CEO Elon Musk has taken to Twitter to offer a few details about the status of Starship, its Raptor engines, and a few upgrades planned for both.

In mid-December, Musk revealed even more ambitious plans to upgrade Starship by stretching its propellant tanks and adding another three Raptor engines, potentially boosting the ship’s maximum thrust by 50% and substantially improving payload performance. These latest details are focused on an upgraded version of the Raptor engine and on additional changes to Starship’s structural design and assembly process.

Starship SN8, December 2020. (SpaceX)

According to Musk, as SpaceX continues to ramp up ground testing of the upgraded engine variant, “Raptor 2 now operates routinely at 300 bar main chamber pressure.” For context, on February 10th, 2019, just days after SpaceX began testing the first full-scale Raptor prototype ever completed, the engine briefly reached a main combustion chamber pressure just shy of 269 bar (3900 psi). That narrowly beat records set by Russia’s RD-270 and RD-180 engines, the latter of which is used on ULA’s Atlas V.

It took 18 months before Musk revealed clear proof that at least one Raptor prototype sustained such high chamber pressures over a minute or more of steady-state operations. The same engine peaked at an impressive 330 bar (~4800 psi), briefly producing 225 tons (~500,000 lb) of thrust and soundly beating out Russia’s never flown RD-701 engine, which crested 290-300 bar in testing. Another ~18 months after that milestone, Raptor isn’t quite operational in the sense of supporting orbital-class launches but the engine isn’t far from its first and has since supported dozens of Starship static fires and seven flight tests – five of which occurred in a period of just six months.

Already, despite the fact that Raptor 1 or 1.5 engines have yet to even attempt an orbital-class launch, SpaceX has almost entirely moved on to a new and improved variant known as Raptor 2. According to Musk, all Raptor ground testing at the company’s McGregor, Texas development campus is now focused on the new hardware, which reportedly features much cleaner plumbing and wiring. The biggest change to Raptor 2, though, is an almost 25% increase in maximum nominal thrust over Raptor 1/1.5 – from around 185 to 230 tons (408,000-507,000 lbf). That’s partially enabled by widening the ‘throat’ of Raptor’s nozzle, which sacrifices a small amount of efficiency for more power density. However, Raptor 2 also contains design improvements throughout to enable sustained, reliable operation at chamber pressures up to 300 bar – 10% higher than Raptor 1.5.

On October 24th, Musk subtly live-tweeted one of the first Raptor 2 static fires, revealing that the engine reached a chamber pressure of 321 bar (~4650 psi) and briefly produced around 245 tons (~540,000 lbf) of thrust before destroying itself. Now, a little over two months later, Musk says that Raptor 2 prototypes are routinely operating at 300 bar without major issues, meaning that they can ignite and safely shut down after burning for several minutes at those pressures. In theory, given that 300 bar is Raptor 2’s targeted chamber pressure at max thrust, that means that the engine is now “routinely” operating at the level SpaceX wants and needs to take Starship to the next level.

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It’s likely that one or several months of work remain before SpaceX can begin qualifying the first Raptor 2 engines (or, more importantly, hypothetical Raptor 2 Vacuum or Boost variants) for the first Starship or Super Heavy prototypes designed for the new engine. Nonetheless, the rapid progress SpaceX has made in the first few months of Raptor 2 testing is extremely encouraging.

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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 Robotaxi vs. New York Taxi: Why the Yellow Cab has a lot to lose

Tesla Robotaxi could spell the beginning of the end of the New York City yellow cab.

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5 hours ago

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August 13, 2025

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Tesla appears to be on its way into the Big Apple, and a traditional Yellow Cab in New York City might be a thing of the past in the near future.

As Tesla continues to put an immense focus on the rollout of its Robotaxi platform, it is evident that driverless ride-hailing modes of transportation could truly be the way that many choose to get around. This is especially prevalent in cities like New York, where many people do not own cars. Instead, they choose to walk to hail a cab.

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

But the limited number of medallions available for taxi drivers in New York City, as well as several other points of emphasis, seem to show the future is here and yellow cabs might soon be a thing of the past.

Instead of working tirelessly to pay off the debt from medallions, entrepreneurs could soon just buy a Tesla and have it work autonomously in New York City. Tesla executives have mentioned figures as high as $50,000 per year in terms of passive income from Robotaxi operation.

That is just the tip of the iceberg, and Robotaxi presents not only one but at least five distinct advantages over the traditional cab platform. With Tesla starting to seek employees to operate Robotaxi rides in New York, according to recent job postings, New York City cabs should prepare for the disruption Tesla could potentially cause.

Lower Operational Costs and Cheaper Fares

Uber and Lyft have already undercut the costs of New York City taxis, but Robotaxi is starting to undercut even those ride-sharing programs in Austin, Texas.

In terms of how much cheaper Robotaxi will be than cabs, it is an exponential measurement over time. Robotaxi will not require salaries, benefits, or tips, and the cost of Robotaxi could end up being just a fraction of what the same ride would cost in a cab.

This feeds right back into medallion expenses and union wages: even buying a Tesla in the next few years that has the capability to operate as a Robotaxi will be a fraction of what medallions cost, which is sometimes $200,000.

Availability and Scalability

Cabs are available at all hours of the day, but at certain times, they are less available.

Robotaxis can technically operate without breaks, other than charging. Tesla has an immense focus on scaling its Robotaxi platform anyway, and once it is available for the public to use in their personal cars, Model Ys and Cybercabs could be roaming the streets of the five boroughs with more reliability and lower wait times than traditional cabs could ever offer.

This is an issue that is even more relevant in smaller cities or less congested portions of New York.

Safer and More Efficient Rides

Tesla’s Full Self-Driving technology has reported recent safety figures that are ten times less likely to be involved in an accident than a human. Tesla releases a Safety Report for each quarter that proves its safety against human drivers.

As Full Self-Driving continues to advance, it will get better. Riders who want a stable and safe ride could seek Robotaxi instead of going with a human driver. This is something that we’ll likely see more of in the future as sentiment on autonomous driving grows.

Trust in autonomous vehicles has increased substantially over the past ten years. In 2015, surveys showed that trust in autonomous vehicles was low, with only 23 percent of Americans showing that they’d ride in a driverless car.

In 2021, another study performed that asked the same question showed 57 percent of adults would try an autonomous car for their travel.

Seamless App Integration and User Experience

Taxis are not always the most entertaining to ride in, and sometimes they are even more difficult to get a ride in. Robotaxi has already shown to be an incredibly user-friendly experience, with riders being able to choose what temperature the cabin is and what music they want to listen to in the cabin.

The addition of a rear screen also allows riders to choose from a selection of games or YouTube videos in the car.

Hailing a vehicle was basically resolved with the use of Uber and Lyft. Robotaxi is just as good, if not better, from an app standpoint, especially as the in-car climate is able to be adjusted from the Robotaxi app.

Music from one Robotaxi will continue to play in your next one, too. It’s a small luxury, but it’s a feature that is an improvement over a traditional taxi.

The Push for Sustainability by New York City

New York is pushing for a city-owned fleet of all-electric vehicles by 2027.

Its green initiatives, including the Green Rides Initiative, have pushed the city’s rideshare trips to be conducted by either zero-emission or wheelchair accessible vehicles by 2030.

Tesla Model 3 taxis drive NY’s resolution for more all-electric yellow cabs

The focus by consumers to use green or zero-emission vehicles could also steer right into the direction of Tesla Robotaxi, as none of the vehicles in the Robotaxi fleet will be anything but all-electric Teslas.

Carbon neutrality is a goal of the City and its residents. Moving forward, we could see these programs start to put immense pressure on the yellow cab, which could eventually be a thing of the past.

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Tesla plans to use Unreal Engine for driver visualization with crazy upgrade

This could change the way Driver Visualization looks for Tesla owners.

Published

7 hours ago

on

August 13, 2025

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Credit: Tesla Newswire | X

Tesla looks to be planning a major upgrade to its driver visualization for Autopilot with a crazy upgrade from its current version.

Tesla’s driver visualization appears on the center screen and shows the vehicle, its surroundings, and, when it is operating on Autopilot or Full Self-Driving, shows the route of travel.

It has improved over the years, and even includes things like pedestrians, pets, and the shapes of other vehicles. It also helps with manual driving because it can be a good representation of your surroundings when trying to change lanes or merge in traffic.

However, it appears Tesla is planning a pretty substantial upgrade with the

Coding found in the 2025.20 firmware by Tesla hacker greentheonly showed the company is planning to utilize Unreal Engine for Autopilot visualization. He said the one Tesla currently uses is “godot-based.”

Unreal Engine is a 3D computer graphics game engine that was developed by Epic Games, the developer of the popular third-party shooter game Fortnite. It was first released back in 1998, and the most recent version is Unreal Engine 5. The sixth version is in development, and it could be out in 2027 or 2028.

However, Tesla could use it for a more realistic representation of vehicle surroundings. It would undoubtedly improve driver visualization, creating a smoother and freer-flowing depiction of what is outside of the car.

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SpaceX is rolling out a new feature to Starlink that could be a lifesaver

Starlink now has a new Standby Mode that will enable low-speed internet access in the event of an outage.

Published

9 hours ago

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August 13, 2025

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(Credit: Starlink | X)

SpaceX is rolling out a new feature to Starlink that could be a lifesaver in some instances, but more of a luxury for others.

Starlink is the satellite internet service that Elon Musk’s company SpaceX launched several years ago. It has been adopted by many people at their homes, many airlines on their planes, and many maritime companies on their ships.

SpaceX produces its 10 millionth Starlink kit

It has been a great way for customers to relieve themselves of the contracts and hidden fees of traditional internet service providers.

Now, Starlink is rolling out a new service feature on its units called “Standby Mode,” which is part of Pause Mode. The company notified customers of the change in an email:

“We’re reaching out to you to let you know the Pause feature on your plan has been updated. Pause now includes Standby Mode, which comes with unlimited low-speed data for $5.00 per month, perfect for backup connectivity and emergency use. These updates will take effect in 30 days. All of your other plan features remain the same. You are able to cancel your service at any time for no charge.”

SpaceX did not define how fast these “low speeds” will be. However, there are people who have tested the Standby Mode, and they reported speeds of about 500 kilobytes per second.

The mode is ideal for people who might deal with internet or power outages, but still need to have some sort of internet access.

It could also be used as a backup for people who want to stay with their ISP, but would like to have some sort of alternative in case of an outage for any reason.

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