News
SpaceX ships 200th Falcon second stage, highlighting the flip-side of booster reuse
SpaceX has built and shipped its 200th Falcon second stage, highlighting the often underappreciated rocket’s record of achievement on the ground and in flight.
Approximately 13 years ago, in late 2009 or early 2010, SpaceX shipped the first flightworthy prototype of the first iteration of its Falcon 9 second stage. In June 2010, Falcon 9 lifted off on its inaugural test flight and, with the help of that second stage, successfully launched a boilerplate mockup of Dragon spacecraft into orbit. Since Falcon 9’s surprising inaugural success, SpaceX’s Falcon 9 and Falcon Heavy rockets have launched another 187 times for a total of 188 launches and 189 assembled rockets. Every one of those launches has required a new second stage, and all but one (Crew Dragon’s In-Flight Abort test) required a new Merlin Vacuum engine.
While SpaceX is most famous for the successful realization of rapidly reusable Falcon boosters, the company’s overall success is also inextricably linked to Falcon second stages, which are and always will be expended after every launch. For every spectacular Falcon booster landing or reuse record, a Falcon second stage either unceremoniously burns up in Earth’s atmosphere or finds itself stranded in orbit. As a result, even as SpaceX’s reusability has allowed it to launch more than ever before with a fleet of just 10-20 Falcon boosters, the company has had to expand the production of Falcon second stages extraordinary levels.
SpaceX just completed its 188th Falcon 9/Heavy launch, so the 200th flightworthy second stage and Merlin Vacuum (MVac) engine are probably scheduled to launch sometime in January 2023. In the last 365 days, SpaceX’s Falcon rockets have completed 59 successful orbital launches. Every launch has required a new second stage, so SpaceX, on average, has consistently built, shipped, and tested a new Falcon second stage every 6.2 days for more than a year.
Thanks to SpaceX’s record-breaking 2022 launch cadence, which has resulted in Falcon 9 launching more in one calendar year than any other rocket in history, the Falcon second stage has likely become the most-produced orbital rocket stage in decades. Barring surprises, SpaceX is on track to achieve CEO Elon Musk’s goal of 60 Falcon launches in 2022. But SpaceX isn’t done yet, and CEO Elon Musk says that the company is targeting “up to 100 launches” in 2023. After nearly doubling between early and late 2021, that will require Falcon second stage production to increase another ~67% year-over-year.
In its 12.5-year career, Falcon 9 has suffered three failures. In October 2012, on its third launch, one of Falcon 9’s nine Merlin 1C booster engines failed in flight. The main mission – a Dragon cargo mission to the International Space Station – was saved by the second stage, which autonomously compensated for the lost performance, but a secondary payload (Orbcomm’s first OG2 satellite prototype) was lost as a result. In June 2015, a faulty strut inside Falcon 9’s second stage caused a helium pressure vessel to break loose and rupture, destroying the rocket mid-flight. And in September 2016, during a prelaunch static fire test, a similar pressure vessel inside an upgraded Falcon 9’s second stage spontaneously sparked, causing an explosion that destroyed the rocket while it was still on the ground.
As a result, while problems with Falcon second stages have technically caused both of Falcon 9’s only catastrophic failures, it’s still true that a free-flying Falcon second stage has never failed in flight. The same is true for the second stage’s Merlin Vacuum engine: over hundreds of burns and more than 70,000 seconds of operation, MVac has never failed in flight.
After Falcon 9’s successful November 3rd, 2022 launch of the Eutelsat Hotbird 13G communications satellite, SpaceX’s Falcon rocket family has completed 160 launches without failure, arguably making it the most reliable rocket family in history. To achieve that feat with its partially-reusable Falcon 9 and Falcon Heavy rockets, SpaceX has had to master reusable and expendable orbital rockets to a degree that only a few other companies or space agencies in history can claim to have matched or exceeded, and that none have achieved simultaneously.
News
Tesla Cybercab spotted with interesting charging solution, stimulating discussion
The port is located in the rear of the vehicle and features a manual door and latch for plug-in, and the video shows an employee connecting to a Tesla Supercharger.
Tesla Cybercab units are being tested publicly on roads throughout various areas of the United States, and a recent sighting of the vehicle’s charging port has certainly stimulated some discussions throughout the community.
The Cybercab is geared toward being a fully-autonomous vehicle, void of a steering wheel or pedals, only operating with the use of the Full Self-Driving suite. Everything from the driving itself to the charging to the cleaning is intended to be operated autonomously.
But a recent sighting of the vehicle has incited some speculation as to whether the vehicle might have some manual features, which would make sense, but let’s take a look:
🚨 Tesla Cybercab charging port is in the rear of the vehicle!
Here’s a great look at plugging it in!!
— TESLARATI (@Teslarati) January 29, 2026
The port is located in the rear of the vehicle and features a manual door and latch for plug-in, and the video shows an employee connecting to a Tesla Supercharger.
Now, it is important to remember these are prototype vehicles, and not the final product. Additionally, Tesla has said it plans to introduce wireless induction charging in the future, but it is not currently available, so these units need to have some ability to charge.
However, there are some arguments for a charging system like this, especially as the operation of the Cybercab begins after production starts, which is scheduled for April.
Wireless for Operation, Wired for Downtime
It seems ideal to use induction charging when the Cybercab is in operation. As it is for most Tesla owners taking roadtrips, Supercharging stops are only a few minutes long for the most part.
The Cybercab would benefit from more frequent Supercharging stops in between rides while it is operating a ride-sharing program.
Tesla wireless charging patent revealed ahead of Robotaxi unveiling event
However, when the vehicle rolls back to its hub for cleaning and maintenance, standard charging, where it is plugged into a charger of some kind, seems more ideal.
In the 45-minutes that the car is being cleaned and is having maintenance, it could be fully charged and ready for another full shift of rides, grabbing a few miles of range with induction charging when it’s out and about.
Induction Charging Challenges
Induction charging is still something that presents many challenges for companies that use it for anything, including things as trivial as charging cell phones.
While it is convenient, a lot of the charge is lost during heat transfer, which is something that is common with wireless charging solutions. Even in Teslas, the wireless charging mat present in its vehicles has been a common complaint among owners, so much so that the company recently included a feature to turn them off.
Production Timing and Potential Challenges
With Tesla planning to begin Cybercab production in April, the real challenge with the induction charging is whether the company can develop an effective wireless apparatus in that short time frame.
It has been in development for several years, but solving the issue with heat and energy loss is something that is not an easy task.
In the short-term, Tesla could utilize this port for normal Supercharging operation on the Cybercab. Eventually, it could be phased out as induction charging proves to be a more effective and convenient option.
News
Tesla confirms that it finally solved its 4680 battery’s dry cathode process
The suggests the company has finally resolved one of the most challenging aspects of its next-generation battery cells.
Tesla has confirmed that it is now producing both the anode and cathode of its 4680 battery cells using a dry-electrode process, marking a key breakthrough in a technology the company has been working to industrialize for years.
The update, disclosed in Tesla’s Q4 and FY 2025 update letter, suggests the company has finally resolved one of the most challenging aspects of its next-generation battery cells.
Dry cathode 4680 cells
In its Q4 and FY 2025 update letter, Tesla stated that it is now producing 4680 cells whose anode and cathode were produced during the dry electrode process. The confirmation addresses long-standing questions around whether Tesla could bring its dry cathode process into sustained production.
The disclosure was highlighted on X by Bonne Eggleston, Tesla’s Vice President of 4680 batteries, who wrote that “both electrodes use our dry process.”
Tesla first introduced the dry-electrode concept during its Battery Day presentation in 2020, pitching it as a way to simplify production, reduce factory footprint, lower costs, and improve energy density. While Tesla has been producing 4680 cells for some time, the company had previously relied on more conventional approaches for parts of the process, leading to questions about whether a full dry-electrode process could even be achieved.
4680 packs for Model Y
Tesla also revealed in its Q4 and FY 2025 Update Letter that it has begun producing battery packs for certain Model Y vehicles using its in-house 4680 cells. As per Tesla:Â
“We have begun to produce battery packs for certain Model Ys with our 4680 cells, unlocking an additional vector of supply to help navigate increasingly complex supply chain challenges caused by trade barriers and tariff risks.”
The timing is notable. With Tesla preparing to wind down Model S and Model X production, the Model Y and Model 3 are expected to account for an even larger share of the company’s vehicle output. Ensuring that the Model Y can be equipped with domestically produced 4680 battery packs gives Tesla greater flexibility to maintain production volumes in the United States, even as global battery supply chains face increasing complexity.
Elon Musk
Tesla Giga Texas to feature massive Optimus V4 production line
This suggests that while the first Optimus line will be set up in the Fremont Factory, the real ramp of Optimus’ production will happen in Giga Texas.
Tesla will build Optimus 4 in Giga Texas, and its production line will be massive. This was, at least, as per recent comments by CEO Elon Musk on social media platform X.
Optimus 4 production
In response to a post on X which expressed surprise that Optimus will be produced in California, Musk stated that “Optimus 4 will be built in Texas at much higher volume.” This suggests that while the first Optimus line will be set up in the Fremont Factory, and while the line itself will be capable of producing 1 million humanoid robots per year, the real ramp of Optimus’ production will happen in Giga Texas.Â
This was not the first time that Elon Musk shared his plans for Optimus’ production at Gigafactory Texas. During the 2025 Annual Shareholder Meeting, he stated that Giga Texas’ Optimus line will produce 10 million units of the humanoid robot per year. He did not, however, state at the time that Giga Texas would produce Optimus V4.Â
“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 ten million unit per year production line here,” Musk stated.Â
How big Optimus could become
During Tesla’s Q4 and FY 2025 earnings call, Musk offered additional context on the potential of Optimus. While he stated that the ramp of Optimus’ production will be deliberate at first, the humanoid robot itself will have the potential to change the world.Â
“Optimus really will be a general-purpose robot that can learn by observing human behavior. You can demonstrate a task or verbally describe a task or show it a task. Even show it a video, it will be able to do that task. It’s going to be a very capable robot. I think long-term Optimus will have a very significant impact on the US GDP.
“It will actually move the needle on US GDP significantly. In conclusion, there are still many who doubt our ambitions for creating amazing abundance. We are confident it can be done, and we are making the right moves technologically to ensure that it does. Tesla, Inc. has never been a company to shy away from solving the hardest problems,” Musk stated.
Tesla Cybercab spotted with interesting charging solution, stimulating discussion
Tesla confirms that it finally solved its 4680 battery’s dry cathode process
