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SpaceX's new Starship test stand to make life a little easier for Raptor engine engineers

According to SpaceX CEO Elon Musk, one seemingly small tweak to Starship engine testing could make life much easier for Raptor engineers. (SpaceX)

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SpaceX recently debuted a new rocket engine test stand at its Central Texas development facilities and one specific aspect of the so-called ‘tripod stand’ could make life a lot easier for Starship’s Raptor engine engineers.

The success of SpaceX’s extremely ambitious Starship spacecraft and Super Heavy boosters hinges heavily on the prior success of a next-generation rocket engine the company is developing itself. Known as Raptor, the engine is likely one of the most complex ever developed, owing to its use of a combustion cycle that’s as challenging and unforgiving as it is efficient. That efficiency is the draw.

The decision to base the Starship launch system around methane and oxygen propellant – relatively dense, safe to handle, and easy to generate on Mars – means that it can never be as efficient as a rocket based on hydrogen and oxygen, the pinnacle of chemical combustion-based propulsion. For a methalox rocket as nominally reusable as Starship, going to extremes to eke even a smidge of extra efficiency out of its Raptor engines is a reasonable – if not necessary – decision. However, that pursuit of efficiency carries many hurdles with it, some of which can even be exacerbated by the equipment used to test those engines on the ground.

SpaceX mocked up Starship Mk1 with three Raptor engines in late-September, but all three departed Boca Chica shortly after Musk’s presentation. (SpaceX)

Raptor is less than unique in this particular case but SpaceX’s engine development and testing has matured to the point that the stands it’s relied on for static fires have become a detriment to the engine’s progress. Specifically, aside from Starhopper, all previous Raptor static fires have been performed with engines installed horizontally in test bays located at SpaceX’s McGregor, Texas development facilities. While in flight, Raptor engines will theoretically never experience wear and tear similar to the unique conditions imposed by horizontal testing – engine burns will almost invariably exert forces along a vertical (up and down) axis.

To almost anyone else, even other engine development companies, this might seem like an insignificant difference. Built around the full-flow staged combustion (FFSC) cycle and meant to be unprecedentedly reusable and reliable, the Raptor engine is not quite as forgiving. Since the engine’s inaugural full-scale static fire test just one year ago, SpaceX CEO Elon Musk has noted several times that Raptor could benefit from new vertical test stands.

Speaking in October 2019, Musk stated that a new vertical test stand would “hopefully allow simplification of Raptor design, as pump shaft wear & drainage is better in vertical config.” More generally, testing Raptor engines vertically would also be “more representative of flight [conditions]”, allowing SpaceX to live up to its proven “test as you fly” philosophy.

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Pictured here in April 2018, SpaceX’s McGregor, Texas ‘tripod stand’ is visible to the right of the more functional flat-ground stand that replaced it. Also present is the first Falcon 9 Block 5 booster, B1046. (Aero Photo)

Indeed, aside from Starhopper’s two successful test flights and a handful of static fires, Raptor has performed barely any vertical testing despite more than 3200 seconds of static fires completed with 18 full-scale engine prototypes in the last 12 months alone. Including subscale engines tested from 2016 through 2018, SpaceX’s Raptor engine has likely completed some 5000 seconds (>80 minutes) of test fires over the course of three and a half years of development.

Aside from allowing SpaceX engineers to potentially simplify the Raptor engine design and test the Starship engines in conditions much closer to what they will experience in flight, the addition of a new dedicated test stand – on top of two existing horizontal bays – should allow even more testing to be done in a given time-frame. The more testing that can be done, the more engines SpaceX can quickly qualify for flight, and given that every Starship/Super Heavy pair could require up to 43 new Raptor engines, SpaceX will need all the testing capacity it can get.

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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 confirms annoying Full Self-Driving feature has been fixed

Tesla has changed one of its driver monitoring features in a request from several owners.

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Tesla has confirmed that an annoying Full Self-Driving feature has been fixed.

We reported last week that several owners reported changes in the feature, and now we have confirmation that it has been revised by Tesla.

Tesla Full Self-Driving (Supervised) does not require a driver’s hands to be on the steering wheel. However, eye movements and attentiveness are tracked through a cabin-facing camera, aiming to improve safety and limit loopholes in the system.

Tesla seems to have fixed one of Full Self-Driving’s most annoying features

If the system detects that your eyes are not on the road or you are not paying attention, FSD will nudge you to get them back on the road. Too many occurrences of the driver not paying attention will result in losing access to FSD for the remainder of the drive.

However, many drivers using FSD complained that the system was too quick to alert drivers of inattentiveness. Fixing things like the HVAC temperature or even Autopilot settings on the center touchscreen would get you a nudge, which seemed unreasonably fast. Many drivers said it was a seven-second limit, but it seemed faster than this.

In my experience, FSD nudged me to pay attention to the road when I was adjusting the speed offset, which gives the vehicle permission to travel over the speed limit by a percentage. For example, a 10% offset in a 50 MPH zone would let the car travel 55 MPH.

The nudging seemed to be too fast and annoying, and many other Tesla drivers agreed. CEO Elon Musk had even noted that the nudge was too fast and drivers were right to be annoyed with it, especially considering that, in theory, it would be safer to adjust these settings on FSD and not while operating the car manually.

Tesla took the criticism drivers had and turned it into a much-needed and notable change that has now been confirmed by Ashok Elluswamy, Head of AI and Autopilot for the company:

The change seems to be initiated on vehicles with Hardware 4. It is certainly a welcome change as the nudge was just a tad sensitive and could have been much more reasonable.

The adjustment made by Tesla came just a week after owners truly started becoming more vocal about the issue.

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Tesla bull, ARK head Cathie Wood says brand damage is not long-term

Cathie Wood of ARK Invest does not believe Tesla brand damage is a long-term problem.

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Tesla bull and head of ARK Invest, Cathie Wood, admitted during an interview with Bloomberg that she does believe the company has experienced some brand damage due to CEO Elon Musk’s political involvement. However, she does not believe it is a long-term issue.

Over the past eight months, Musk’s involvement in the U.S. political landscape has swayed some to stop supporting Tesla, others to ditch their cars, and some to boycott the brand altogether. Inversely, others have started supporting Musk, Tesla, and its products as a nod of support for what he’s done for government efficiency.

The perspective on how Musk’s involvement has impacted Tesla truly varies. Its impact has been noticeable, especially in Europe, as some countries have seen some pretty drastic declines in deliveries since the start of the year.

However, some of this can be attributed to the company’s switchover to new production lines for the updated Model Y. Some can also be blamed on economic issues, as the cost of living is still relatively high. There is no denying that at least some of the impact has come from those who simply disagree with Musk and are choosing not to buy his companies’ products.

Wood is among Tesla’s most outspoken bulls and has tremendously high expectations for the stock moving into the late 2020s and into the 2030s. In a recent interview, she highlighted the brand’s exceptional potential moving forward, but did address some of the short-term concerns, especially regarding Tesla’s perception amongst the public:

“I think he feels he has a duty to the country to make sure we don’t ‘blow ourselves up’ with these deficits. Brand damage? Yes. I do not believe [it is long-term]. Tesla, we believe, will have a lock on the Robotaxi business in the U.S., and we believe they are going to proliferate through the United States, especially if we remove regulation from a state level to a federal level, which we believe will happen.”

Musk announced during the company’s most recent Earnings Call that he would step back from his government duties and return to Tesla in a more consistent role, as his work with the Department of Government Efficiency (DOGE) seemed to be winding down to a certain extent.

Tesla CEO Elon Musk confirms time spent with DOGE will drop ‘significantly’

It was a big win for Tesla investors, as many were interested in Musk returning his focus to the automaker, especially as 2025 is expected to be a year of many catalysts between the Robotaxi launch, affordable models coming into play, production of the Semi starting at the tail-end of the year, and the Optimus robot continuing consistent development.

Wood was quick to point out that Tesla is not the only car company that was suffering with lagging sales, as a macro-level perspective on the automotive industry proves that many automakers are looking for ways to avert disaster due to the ongoing tariff war.

Tesla is still the highest-valued automaker in the world, and it has plenty of bullish points to look forward to as the year nears the halfway point.

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Tesla offers interesting promo to future ride-hailing rival’s drivers

Lyft drivers will get $1,000 in vehicle credits if they complete 100 rides by the cutoff date for the promo.

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(Credit: Tesla)

Tesla has offered an interesting promotion for its vehicles to the drivers of one of its future ride-hailing rivals as it continues to work toward the launch of its autonomous Robotaxi platform.

This morning, Tesla launched a $1,000 off promotion to Lyft drivers who plan to utilize one of the company’s EVs for ride-hailing purposes. The promo applies to all five Tesla models: the Model S, Model 3, Model X, Model Y, and Cybertruck.

It is not offered at the point of sale. Instead, to ensure the vehicle is properly utilized for ride-hailing purposes and to prove the discount, Tesla will offer $1,000 in vehicle credits to the Lyft driver after they complete 100 trips on or before July 13, 2025. Delivery must be taken by June 30.

It is an interesting move by Tesla because Lyft, along with Uber, will become a rival in the coming years as the companies continue to develop driverless ride-hailing platforms of their own. Lyft has partnered with May Mobility and Mobileye to develop driverless, fully autonomous vehicles purpose-built for ride-hailing.

Tesla plans to launch its Robotaxi platform next month in Austin, Texas.

Tesla hints at June 1 launch of Robotaxi platform in Austin

Meanwhile, Lyft’s plans are more down the road. Earlier this year, the company said it would launch autonomous rides sometime next year.

For now, the move seems to be just another way Tesla is incentivizing consumers to buy one of their vehicles. Earlier this week, it also launched another $1,000 off promo for teachers, students, retirees, active-duty members, their spouses, and surviving spouses.

Previously, Tesla only offered that discount to military members.

It is unclear why Tesla would be offering these discounts, but it could be more of a thank you or an act of recognition, more than anything. If it were a measure that was taken to increase demand, it would be substantially more of a discount. For example, when Tesla was trying to rid its inventory of legacy Model Y units as the new, updated vehicle was set to be released, discounts were over $5,000.

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