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SpaceX retracts latest rocket’s landing legs in impressive feat of durability

Falcon 9 B1051 and three of its four landing legs are pictured here on April 26th after the booster's fourth successful launch and landing. (Richard Angle)

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5 years ago

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A SpaceX Falcon 9 booster had all four of its landing legs successfully retracted after a flawless fourth launch and landing, highlighting the impressive margins and durability of the rocket’s upgraded Block 5 design.

On April 22nd, Falcon 9 booster B1051 lifted off on its fourth orbital-class mission – also its second 60-satellite Starlink launch this. Around eight minutes later, B1051 successfully landed aboard drone ship Of Course I Still Love You (OCISLY), ending a back-to-back streak of failed ocean recoveries for SpaceX and verifying that the cause of a March 2020 in-flight engine failure had been rectified. After the loss of booster B1056 and B1048 in February and March, it was also simply a relief to have B1051 safe and sound aboard OCISLY, ensuring that the rocket should be able to support another launch in the near future.

After sailing in port on April 26th, SpaceX technicians lifted a booster off of drone ship OCISLY’s deck for the first time since late January – coincidentally (or maybe not) also Falcon 9 B1051. Two days after its arrival in port and transfer onto dry land, SpaceX successfully retracted all of the massive booster’s landing legs in less than three hours and had it ready for transport less than two hours after that. While B1051’s brisk fourth recovery didn’t break any records, it still serves as a reminder of Falcon 9’s impressive durability in light of the landing it experienced just ~85 days prior.

SpaceX has been routinely retracting Falcon 9 landing legs for almost a full year. (Tom Cross)

B1051’s successful leg retraction after its fourth launch and landing is particularly impressive for one main reason: after its third launch, the booster suffered perhaps the hardest drone ship landing any Block 5 rocket has thus far experienced.

Taken in March 2019 and February 2020 after Falcon 9 B1051’s first and third launches and landings, the photo below reveals just how hard a landing B1051 experienced after its Starlink-4 launch. Built almost entirely out of carbon fiber composites and mounted directly to the rocket’s tank walls, Falcon’s telescoping landing legs rely on something known as a ‘crush core’ – made out of aluminum honeycomb – that’s designed to intentionally collapse under a very specific amount of stress.

(Tom Cross/Richard Angle)

The crush core is situated in the very tip of the cylindrical leg booms and is easily visible above on the left, while it has nearly disappeared in the right (after) photo after an exceptionally hard landing used up what looks like 90+% of the booster’s safety margin. In other words, if B1051 had landed just a little harder after its third launch, it’s possible that the booster’s landing leg booms would have used up all their crush cores and been driven into the kerosene tank they attach to, potentially totaling the Falcon 9 first stage.

Instead, while clearly a rough landing, B1051 appears to have had its landing leg crush cores replaced and was made ready for another Starlink launch less than three months after that exceptionally hard landing. In other words, despite the rarity of similar hard landings over dozens of recent booster landings, SpaceX was apparently almost entirely unconcerned about the rocket’s state.

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(Richard Angle)
(Richard Angle)

As usual, the company almost certainly checked the structural integrity of B1051’s major welds and landing leg hardware before certifying the vehicle for its fourth launch, but the fact that its reuse was so seemingly unexceptional is a testament to the sheer durability of SpaceX’s reusable rocket boosters. Thanks to the modularity of its design, B1051 should have no trouble performing at least several more orbital-class launches over the next several months (if not years). More likely than not, the Falcon 9 Block 5 rocket will fly again just two or so months from now on another Starlink mission, of which SpaceX has 20+ nominally scheduled this year alone.

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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 releases cryptic teaser for something massive and it’s coming this week

On Sunday morning, Tesla released a nine-second teaser video of what appears to be either a vehicle wheel, fan, or some sort of propeller, but there are no real clues as to what it could be exactly.

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8 hours ago

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October 5, 2025

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Credit: Tesla

Tesla has released a cryptic teaser for something massive, and it will release details on it this week. With many different projects in the works, there is a lot of speculation going on about what it could potentially be, but we have a few ideas.

On Sunday morning, Tesla released a nine-second teaser video of what appears to be either a vehicle wheel, fan, or some sort of propeller, but there are no real clues as to what it could be exactly.

It then ends with “10/7,” meaning it will announce something on October 7, which is this Tuesday:

Given that Tesla has been working on a handful of pretty notable projects that are set for unveiling at the end of this year, and there are some clues that seem to point in their direction with this short teaser video.

There are two projects that come to mind almost immediately: the Tesla Roadster is one, and the “E41” or affordable model is the other. Here’s what we know about both:

Tesla Roadster Demo Event

Tesla said earlier this year that it would have a demo event for the Roadster to unveil some new technologies and show off what it has been working on over the past few years.

There have been a lot of crazy things in the works for the Roadster, including a SpaceX package that would use cold-gas thrusters for an insane 1.1-second 0-60 MPH acceleration rate. This package was also supposed to help it hover, something CEO Elon Musk has teased for the past few years.

The Roadster was ready for release earlier this year, but after Chief Designer Franz von Holzhausen and VP of Powertrain Lars Moravy showed Musk what they had come up with, he wanted more.

Moravy said on the Ride the Lightning podcast earlier this year:

“What we had come up with exceeded what we originally planned. So, Elon was like, ‘Wow, great. Let’s do more!'”

The Roadster event was coined as “the most epic demo,” and since it was planned for the end of 2025, it is totally feasible to believe this could be it.

Elon Musk teases Tesla’s “most epic demo” by end of year

Tesla ‘E41’ Affordable Model

Some believe the teaser could be the official launch of Tesla’s affordable model, which Musk said earlier this year is simply a stripped down Model Y.

There have been some sightings of this vehicle in the past few weeks, including one on Friday that showed the vehicle completely uncovered for the first time:

The launch of the affordable model makes sense, especially from a timing perspective. With the $7,500 EV tax credit officially coming to a close on September 30, many are wondering how Tesla will spark growth in its deliveries. A more affordable EV would be the perfect response, and it is something that Tesla has been working on for some time.

Other Potential Ideas

There are some pretty interesting ideas as to what the teaser could be apart from the Roadster or affordable model. Some believe it could be a cooling fan for a GPU cluster, which would make sense considering Tesla’s prowess in data.

Grok also made an interesting guess, stating it could be a propeller for a secret air taxi Tesla is developing. This seems sort of our of left field.

We do know Tesla hosted a handful of influencers at Gigafactory Texas this past week, so whatever the company showed them is likely what will be unveiled on Tuesday.

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Tesla Optimus is learning martial arts in new video teasing capabilities

For the past few months, Tesla has been refining its capabilities and making some serious progress on what Optimus is capable of. This morning, Musk released a new video showing Optimus learning Kung Fu, perhaps its most impressive feat yet.

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1 day ago

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October 4, 2025

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Credit: Elon Musk | X

Tesla Optimus is learning martial arts, a new video released by CEO Elon Musk shows, a crazy development and advancement in the robotics project the company has been working on for a few years.

Optimus has been a major focus of Tesla for the past several years, especially as Musk has said he believes it will be the biggest product of all time and could be the biggest contributor to the company’s valuation.

For the past few months, Tesla has been refining its capabilities and making some serious progress on what Optimus is capable of. This morning, Musk released a new video showing Optimus learning Kung Fu, perhaps its most impressive feat yet:

The video shows Optimus working with a Kung Fu teacher, known as a Shifu, going through what appears to be some sort of routine of combinations. It’s quite impressive to see the fluidity of the movements and Optimus’s ability to keep up with Shifu.

Tesla has been “working hard” to scale Optimus production, Musk said last week, a project that has obviously confronted both AI and manufacturing teams with a variety of challenges.

The plan is to have an annual production run-rate of one million units by 2030, and there were plans to build 5,000 units this year.

Elon Musk gives update on Tesla Optimus progress

Musk still believes Optimus will make up roughly 80 percent of Tesla’s value. In January, he said it would be “overwhelmingly the value of the company.”

Tesla plans to launch the Gen 3 version of Optimus soon, and although a video of a new-look prototype was released by Marc Benioff, the CEO of Salesforce, the company’s frontman stated that this was not what the next-generation prototype would look like.

Elon Musk confirms Tesla has never shown Optimus V3 design yet

This video seems to show there is still significant progress being made on the Optimus project, and it will be perhaps one of the most impressive humanoid robots available to consumers in the coming years.

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Tesla Full Self-Driving v14 gets new release date, Elon Musk details

“Last minute bug cropped up with V14. Released is pushed to Monday, but that gives us time to add a few more features.”

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1 day ago

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October 4, 2025

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Credit: Tesla

Tesla’s Full Self-Driving version 14 has gotten a new release date after new details from CEO Elon Musk opened up some new perspectives on the suite.

Originally slated for an “early wide release” of v14 this past week, then a launch of v14.1 and v14.2 this week and next week, respectively, delays arose after Tesla’s Autopilot team found some issues within the software.

Tesla FSD V14 set for early wide release next week: Elon Musk

Musk detailed on X this morning that a “last minute bug” appeared before release, which has now pushed FSD v14’s release back to this Monday:

Musk also said the delay would give Tesla the ability to “add a few more features,” which seems like an added advantage, although he did not provide any additional details on what these features could be.

In classic Musk fashion, he has teased the capabilities of this version of the FSD suite since it became public knowledge that Tesla was working on it. He said that it is the second most important update for the AI/Autopilot team since FSD v12.

V14 will have a parameter count that is ten times what previous iterations were, which should provide more accuracy and a more human-like operation.

Musk has said v14 “feels alive” and has used the word “sentient” to describe its performance. The goal with the new FSD rollouts is to eliminate as many interventions as possible, making it as close to human driving as possible.

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