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SpaceX's "Christmas tree" is a Raptor engine for the holidays
SpaceX CEO Elon Musk showed off a holiday-themed Raptor engine “Christmas tree” with its very own star on top. Musk noted via a tweet that the company’s Starship propulsion team is “making great progress” building, testing, and refining the Raptor engines that will one day propel the next-generation rocket to Earth orbit and beyond.
On December 13th, Musk revealed that SpaceX is preparing to ship the 17th completed Raptor engine to the company’s McGregor, Texas rocket test and development facilities, the site of several dedicated test stands for the Starship engine. Likely one of the most complex rocket engines ever designed, built, or tested, Raptor relies on an exotic combustion cycle, referring to the specifics of how engines turn their propellant into meaningful thrust.
Raptor uses what is known as full-flow staged combustion (FFSC) and is the first FFSC engine to graduate beyond ground testing and actually fly, thus far having completed two flight tests in July and August 2019 as part of SpaceX’s Starhopper test campaign. In simple terms, the FFSC cycle aims to extract as much energy from a rocket’s propellant as efficiently as possible, resulting in what is theoretically the most efficient possible chemical propulsion from a given fuel and oxidizer combination.
Due to the sheer complexity required to achieve full-flow staged combustion, the engine type is incredibly rare and only two other (once) functional examples exist – one developed by Soviet engineers in the 20th century and the other built, tested, and inexplicably scrapped by NASA in the 2000s. In fact, the Soviet RD-270 engine’s thrust-to-weight ratio is likely second only to SpaceX’s own Merlin 1D engine, an absolutely spectacular achievement for a propulsion bureau operating in the late 1960s.
RD-270 had major development challenges and would likely have taken years of additional hardware-rich (i.e. destructive trial and error) testing to produce an engine actually capable of reliable flight. Before the program was cancelled in 1970, 22 engines were tested and no single RD-270 survived to perform a fourth static fire, a testament to the immense challenge of FFSC engines.
SpaceX appears to have had a much better go of it with Raptor, although many, many engines have definitely been destroyed or irreparably damaged since the full-scale engine’s February 2019 static fire debut. SpaceX CEO Elon Musk says that the 17th completed Raptor engine is almost ready to head to McGregor, Texas to kick off development and acceptance testing.
It remains to be seen when exactly Raptor engines will be mature and reliable enough to perform the 3-10 minute burns needed to send a Starship to orbit, let alone the Moon or Mars, but Musk appears confident that SpaceX is making great progress along those lines.
Per photos and info posted by NASASpaceflight.com earlier today, Raptor engine SN15 is already installed on a recently-reactivated McGregor test stand ahead of its first rocket-related test in almost half a decade.
Formerly used to test Falcon 9 first stages before SpaceX built a new stand for Falcon 9 and Heavy, that tripod stand has been reactivated for the sole purpose of supporting vertical Raptor engine static fire testing, which Musk says will simplify and expedite development by making test conditions much more flight-like. As of now, all subscale and full-scale Raptor engine static fire testing has been performed at horizontal test stands in McGregor, apparently resulting in wear and behavior that would not likely appear if engines were tested vertically.
SpaceX has gone through the same process with its Merlin engine programs, beginning with horizontal testing (far easier and simpler) but ultimately building a number of dedicated vertical test bays to ensure that engine acceptance and development tests can be performed under more flight-like conditions.
According to NASASpaceflight, SpaceX may have already fired up Raptor SN15 on its reactivated tripod test stand earlier this week, kicking off Raptor’s first Starhopper-free vertical static fire testing. It’s now unclear where the twin horizontal Raptor test bays will fit into future engine testing given Musk’s comments. More importantly, every completed Starship and Super Heavy rocket will require several dozen new Raptor engines and every one of those engines will likely need to pass acceptance testing (including static fires) in McGregor before they can be installed on a launch vehicle.
SpaceX’s Falcon 9 rocket already requires 10 engines per new booster and upper stage, a test burden SpaceX has only managed with the help of two Merlin 1D stands and one Merlin Vacuum stand, all vertical. In other words, it’s safe to say that the reactivated tripod stand is likely just the first of several vertical Raptor test stands to come.
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Elon Musk
Tesla Optimus’ pilot line will already have an incredible annual output
And this would just be the beginning. In the future, Musk mused that Optimus’ production could literally be out of this world.
During the 2025 Tesla Annual Shareholder Meeting, Elon Musk provided a teaser of the company’s targets for Optimus’s annual production. As per the CEO, Optimus’ pilot line will be capable of producing up to one million units annually.
And this would just be the beginning. In the future, Musk mused that Optimus’ production could literally be out of this world.
Musk targets world’s fastest production ramp for Optimus robots
Tesla’s first Optimus line will be built in Fremont, California, and is projected to produce around one million robots per year. Other facilities like Gigafactory Texas could scale Optimus production to 10 million units annually. Musk even joked that a 100-million-unit line might one day be built “on Mars.” With Optimus, Musk stated that Tesla is looking to achieve a historic production ramp.
“So we’re going to launch on the fastest production ramp of any product of any large complex manufactured product ever, starting with building a one million unit production line in Fremont. And that’s Line One. And then a 10-million-unit-per-year production line here (at Giga Texas). I don’t know where we’re going to put the one hundred million unit production line, maybe on Mars. But I think it’s going to literally get to one hundred million a year, maybe even a billion a year,” Musk said.
Optimus and sustainable abundance
Tesla’s Master Plan Part IV is all about sustainable abundance, and Musk highlighted that the humanoid robot will play a huge role in his vision for the future. He noted that Optimus’ mass production could redefine economic and social systems worldwide and open up premium services for everyone across the globe.
“People often talk about eliminating poverty or giving everyone amazing medical care. There’s only one way to do that, and that’s with the Optimus robot,” Musk said. “With humanoid robots, you can actually give everyone amazing medical care. In terms of Optimus will be more precise. Optimus will ultimately be better than the best human surgeon with a level of precision that is beyond human… People always talked about eliminating poverty, but actually, Optimus will actually eliminate poverty,” Musk said.
Ford is considering a drastic move with its F-150 Lightning, which was the best-selling EV pickup on the market last quarter, beating out Tesla’s Cybertruck.
Ford has had a tumultuous entrance into its more expanded electric vehicle strategy over the past several years. At one point, the company was widely considered to be the most invested legacy automaker in the transition to electrification, but as the company has seen some real backtracking in terms of its sales and demand, it is cooling down its commitment.
At the end of Q3, it seemed to already be considering making some moves to cool off its EV ambitions, especially as the $7,500 EV tax credit was removed and it appeared that consumers would be less attracted to its vehicles without this sizeable discount.
Now, according to a new report from the Wall Street Journal, Ford is considering scrapping the F-150 Lightning altogether, as one employee said “the demand is just not there.”
Despite it being the best-selling EV pickup in the U.S. last quarter, the sales simply do not match up with the pricing, and financially, it is not the time to try to dive further into a project that is not making a profit. Ford has been dwindling in its commitment to EVs over the past several quarters, and its profits are reflecting a slowing interest in its electric vehicles.
Simply put, Ford’s combustion engine lineup of pickups in the F-Series is, by far, the best-selling division of trucks globally. Ford brought an awesome product forth with the Lightning, a mirror of the gas-powered F-Series that had a variety of trim levels for whatever the truck would be used for by the consumer.
However, the demand and sales have caused Ford to take a loss on its electric truck: figures from early last year indicated it was losing between $100,000 and $132,000 per vehicle.
It is not an official announcement, as Ford has not publicly said anything regarding its plans for the Lightning at this time.
Tesla has tentatively scheduled its unveiling event for the Roadster’s next-generation iteration, and you will not believe the date the company picked for it.
Tesla CEO Elon Musk said during the 2025 Annual Shareholders Meeting that the company is aiming for an April 1 demo event.
Yes, April Fools’ Day.
🚨 Tesla’s unveiling event for the Roadster Gen 2 is scheduled for April 1, 2026.
Yes, April Fools’ Day. pic.twitter.com/sw09GUYFPV
— TESLARATI (@Teslarati) November 6, 2025
Tesla originally aimed for its “most epic demo” to take place at the end of this year. However, the writing on the wall as 2025 winds down seemed to indicate the company was not quite ready to show off everything it plans to implement into the Roadster.
Its capabilities have been teased quite heavily throughout most of the year, but the biggest hints came last week when Musk appeared on the Joe Rogan Experience Podcast.
He said:
“Whether it’s good or bad, it will be unforgettable. My friend Peter Thiel once reflected that the future was supposed to have flying cars, but we don’t have flying cars. I think if Peter wants a flying car, he should be able to buy one…I think it has a shot at being the most memorable product unveil ever. [It will be unveiled] hopefully before the end of the year. You know, we need to make sure that it works. This is some crazy technology in this car. Let’s just put it this way: if you took all the James Bond cars and combined them, it’s crazier than that.”
The Roadster has been somewhat of a letdown, at least in its newest version, thus far. Tesla has routinely delayed the project, putting those who put lofty down payments on the car in a weird limbo, lost at what to do.
One notable pre-orderer cancelled his reservation last week and got in a spat with Musk about it.
Now that there is a definitive date for the Roadster unveiling, Musk and Co. should have a more definitive cutoff date for features and capabilities. Chief Designer Franz von Holzhausen said earlier this year that when they showed Musk what they had done with the Roadster, the CEO encouraged them to do even more with it.
This delayed things further.
Musk also said he believes production would begin between 12 and 18 months after the unveiling, putting it out sometime in 2027.
Tesla Optimus’ pilot line will already have an incredible annual output
Ford considers drastic move with F-150 Lightning: ‘The demand is just not there’
Tesla schedules Roadster unveiling event, and you won’t believe when it is
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