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SpaceX recovery ships head to sea for first 'whole-fairing' catch attempt

One of the first views of twin SpaceX fairing recovery ships Ms. Tree & Ms. Chief. After an aborted November trial, the ships are now officially in place for their first simultaneous catch attempt. (Greg Scott)

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After a brisk day-long cruise into the Atlantic Ocean, SpaceX’s twin Falcon fairing recovery ships have reached the general landing area to prepare for their first true ‘whole-fairing’ catch attempt.

Formerly known as Mr. Steven, GO Ms. Tree and new sister ship GO Ms. Chief departed Port Canaveral on December 14th and arrived at their designated recovery roughly 36 hours later. Now stationed just shy of 800 km (500 mi) downrange of SpaceX’s LC-40 Cape Canaveral Air Force Station (CCAFS) launch site, the ships are in position and can begin to prepare for Falcon 9’s Kacific-1/JCSAT-18 launch.

Scheduled to lift off no earlier than (NET) 7:10 pm ET, December 16th (00:10 UTC, Dec 17), Falcon 9 will place the ~6800 kg (15,000 lb) Kacific-1/JCSAT-18 communications satellite in a geostationary transfer orbit (GTO). Falcon 9 booster B1056 will attempt its third landing around nine minutes after launch, to be followed 25 minutes later by satellite deployment from the rocket’s upper stage. deploying the satellite around thirty minutes after launch.

If all goes according to plan, another 12-15 minutes after Falcon 9’s second stage (S2) deploys the Kacific-1/JCSAT-18 satellite, the rocket’s payload fairing halves will begin their final approach towards recovery ships Ms. Tree and Ms. Chief. Just shy of identical twins, the two ships have been outfitted with custom arms, boom supports, and nets with the intention of quite literally catching payload fairing halves out of the air after orbital Falcon 9 (and Heavy) launches.

SpaceX’s fairing recovery development program has had a long and arduous journey from Mr. Steven’s (now Ms. Tree’s) arrival at the company’s Port of Los Angeles dock space (late-2017) to the ship’s first attempted fairing catch (February 2018) and first successful catch (June 2019). In the 20+ months SpaceX has been attempting fairing recoveries, at least a dozen intentional soft ocean landings and seven net catches have been attempted, with numerous successful splashdowns and recoveries ultimately followed by two consecutive catches in June and August 2019.

Ms. Tree’s second successful fairing catch occurred on August 6th, some 45 minutes after Falcon 9 lifted off with the AMOS-17 communications satellite. (SpaceX)
Fairing catcher GO Ms. Chief – the latest addition to SpaceX’s rocket recovery fleet – departed Port Canaveral for sea trials on October 23rd. (Richard Angle – Teslarati)

The fact that SpaceX consecutively caught two fairing halves a little over two months apart after five failed catch attempts suggests that the company has effectively solved the majority of the fairing recovery challenge, becoming the first company (or space agency) in the world to do so. Unfortunately, a three-month launch lull after the second successful catch precluded any rapid-fire follow-up attempts and when that lull came to an end on November 11th, Ms. Tree and Ms. Chief were both ready but were forced to abort the attempt by rough seas.

Both ships actually spent several weeks docked (or stranded) in a North Carolina port after that aborted mission, potentially indicating that SpaceX had to fly a team north to inspect both ships’ arms and ensure that they could make the journey back to Port Canaveral. They were ultimately cleared and returned to their home port around ten days later, where their arms and booms were immediately removed. It’s unclear why that removal occurred but SpaceX’s recovery team rapidly reinstalled their arms in just a few days, followed by their nets soon after.

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Given that their first simultaneous (i.e. ‘whole-fairing’) catch attempt was aborted before it could start, it’s safe to say that December 16th’s hopeful attempt will be Ms. Tree’s and Ms. Chief’s first side-by-side recovery mission. Both ships have successfully reached the recovery zone, a step further than they managed to get on their November attempt. Coincidentally, that November launch happened to mark both SpaceX’s and the world’s first launch of a flight-proven payload fairing, both halves of which were recovered from the ocean and represented a more or less worst-case scenario for reuse.

And nevertheless, that reuse was a flawless success, marred only by the fact that Ms. Tree and Ms. Chief were unable to attempt to recover the world’s first twice-flown payload fairing. In short, all the conditions are right for what could be the world’s first successful recovery of both halves of an orbital-class payload fairing. If successful, SpaceX will have effectively closed the book on Falcon 9 and Heavy reusability development, having proven that both boosters and fairings can be reliably and routinely recovered and reused.

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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 Semi catches fire in California: what we know

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Credit: KTVU

A Tesla Semi caught fire in Hayward, California, which caused both directions of traffic to shut down for hours before being completely reopened early on Wednesday, the California Highway Patrol said.

The fire occurred just after 5:30 local time in Hayward on Tuesday, as the Semi caught fire in the southbound lanes of I-880 before CHP officials made the decision to shut down both lanes of traffic due to potential risks from hazardous chemical smoke.

There were no injuries reported.

The cause of the fire is currently unknown, as neither Tesla nor the CHP have not determined a cause.

However, some images taken before the Semi was completely destroyed by the fire seem to indicate this might have been an older unit, as it appears to be one of the designs that Tesla shipped as part of its pilot program, before revising it and starting mass production just a month ago.

At the time of publication, CHP had not returned our request for a comment for additional details, including the Semi involved and any potential collaboration on an investigation between the CHP and Tesla. We will update this story when we hear back from them.

The southbound lanes were reopened at 3:30 a.m. on Wednesday, with the northbound lanes opening last night a few hours after the fire began. The CHP did state that the lithium batteries were “incredibly difficult to extinguish,” according to NBC Bay Area.

The truck’s driver said that the Semi caught fire, but he did not have an explanation.

An estimated 5,000 to 7,000 semi-truck and large commercial vehicle fires occur on U.S. roadways every year.

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Tesla’s ‘Emergency Drive Away’ function gets its first use in the real world

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Credit: Tesla

Tesla’s launch of the “Emergency Drive Away” function a few months back offered owners a safe option to evacuate an area if they were in reasonable danger. The function finally got its first use in the real world, but it appears it was by mistake.

A video shared by u/Joshalander in the r/TeslaLounge subreddit recorded the instance from his vehicle and said the incident took place in Austin this past weekend during the city’s F1 Race.

“Was charging around 6 AM this past Sunday in Austin before heading to the F1 race and heard a pop. Looked over and saw the new emergency drive-away feature in action. Genuinely felt bad for the dude when he got out and realized what happened, since he looked exhausted and only seemed to half-read the prompts.”

Emergency Drive Away unlatches the Supercharger connector from the vehicle, but still causes damage to both the car and the Supercharger. Tesla has said that it will cost up to $25,000 in repairs to have everything fixed back to normal.

Additionally, the company said that if it were not used in an emergency situation, the driver of the vehicle who activated the Emergency Drive Away feature would be responsible for all repair costs.

Tesla constitutes the following situations as reasonable justifications for activating the feature:

  • You face an immediate threat to your life or personal safety.
  • You must leave the area immediately.
  • Exiting the vehicle is unsafe.
  • Unplugging the charge connector would unreasonably delay your departure or expose you to a risk to your personal safety.

After using the feature, Tesla requires the driver to schedule Service so the car can be inspected.

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Tesla’s Cybercab battery design could make robotaxis even cheaper

Tesla built the Cybercab’s battery pack with spare room for a future switch to LFP.

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Tesla built the Cybercab’s battery pack with empty space inside it on purpose, and the reason points to a cheaper robotaxi down the road.

Robert Sumpf, Tesla’s director of mechanical design engineering for battery modules and packs, said the extra room beside and beneath the Cybercab’s modules was left there so the company can move to lithium iron phosphate cells later. “So, we protected this pack to go to an even lower energy dense chemistry as we scale and need to bring LFP into the platform,” Sumpf said in a Cybercab deep dive with Munro Live.

The Cybercab runs on Tesla’s own 4680 cells with a nickel chemistry today. LFP cells store less energy for their size, so a straight swap would cut range. The reserved space lets Tesla add more LFP cells to make up the difference. In return, Tesla would get cells that cost less, run cooler and survive more charge cycles. LFP became the most used EV battery chemistry in the world last year.

Not all of that room was planned for a chemistry change. Lars Moravy, Tesla’s Vice President of Vehicle Engineering, said part of it exists because “we didn’t need as many batteries as we thought we did.” Tesla told Sandy Munro in early 2025 that it was targeting a Cybercab pack under 50 kWh with close to 300 miles of range.

The pack also breaks from the structural design Tesla used in some Model Y and Cybertruck builds. Instead of potting hundreds of cells into one block, the Cybercab uses four separate, individually sealed modules, so a bad module can be replaced without scrapping the whole pack. Sumpf was blunt about the older approach, giving the Model Y structural battery “a grade D” because it was hard to build and nearly impossible to repair. He estimated a fully structural pack gains about 10% more cell volume, but said “the issue is the service cost.”

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That cost matters more for a car that rarely sits parked. Cybercab chief engineer Eric Earley said replacing an entire pack “before half a million miles is a killer on cost,” which is why remanufacturing and serviceability were built into the design from the start.

The same Munro Live tour produced Moravy’s admission that the Cybercab line at Giga Texas is now outpacing Robotaxi deployments, along with a look at the robotaxi’s unorthodox paint process. Tesla is aiming to deliver the first Cybercabs to outside customers by the end of 2026, though Elon Musk has said the vast majority will stay owned by Tesla and run as a transport service.

Sumpf did not give a date for an LFP version, name a cell supplier or say how a chemistry change would affect range. For now, the 4680 cars keep piling up: Texas DMV records from Tuesday list 544 Cybercabs authorized for Tesla’s Robotaxi fleet, more than the 507 Model Ys on the same roster for the first time.

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