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SpaceX to build small version of BFR’s spaceship for use on Falcon 9, says Elon Musk

A view of spaceship (BFS) separating from BFR booster (BFB). (SpaceX)

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SpaceX CEO Elon Musk has taken to Twitter to announce a new development program: in order to gain experience with the new design and recovery strategy, SpaceX engineers and technicians will apparently build a miniature version of BFR’s winged spaceship able to launch atop Falcon 9 or Falcon Heavy.

According to Musk, the company aims to conduct the first orbital flight of this mini-BFS as early as June 2019, just eight months away.

Described as a “SpaceX tech tree build”, Musk seems to be implying that the strategic purpose of this new development is to act as a stepping stone between Falcon 9 and BFR, two dramatically different launch vehicles relying on a variety of entirely distinct technologies. Based on the fact that Musk believes the mini-BFS could reach orbit as early as June 2019, it seems likely that the miniature spaceship will essentially just be a strengthened Falcon 9 upper stage with fins and a heat shield attached versus a more extreme departure, where the stage would literally be a mini-BFS.

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In the latter scenario, SpaceX could use the opportunity to extensively test – albeit on a smaller scale – a number of immature BFR technologies, including all-composite propellant tanks, autogenous pressurization, a sea level-optimized rocket engine on an orbital upper stage, methane and oxygen (methalox) propellant, actuatable tripod fins, new heat shield materials, and more. If SpaceX has been working on this for several months, there is still a chance that those technologies will be tested on this step-change Falcon 9 S2 variant, but it seems improbable that Musk would have been able to stay totally silent on the plans during his September 2018 update to the BFR program.

Falcon 9 upper-stage recovery

Going off of what little information we have, it seems more likely that the “mini-BFR ship” described by Musk is an effort to realize Falcon 9 upper stage recovery and test BFR’s orbital spaceship recovery strategies than it is an extensive development platform for all critical BFR technologies. Prior to today’s tweet, Musk announced early this year (April, to be precise) that SpaceX would attempt to recovery Falcon 9’s upper stage with a “giant…balloon”, or an inflatable decelerator to use the technical terminology.

Given this new development, it’s unclear if those plans are still on – as a small spaceship, Falcon 9’s upper stage would likely be able to reenter Earth’s atmosphere without the need for something like a single-use inflatable decelerator, which would have always been a suboptimal crutch for the recovery of any orbital spacecraft, be it Falcon 9 or BFR. With this new plan, it appears that SpaceX wants to kill at least two birds with one stone, building a platform capable of flight-testing a handful of new technologies critical to BFR’s success while also potentially realizing the dream of a fully-reusable Falcon 9.

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A gif of Raptor throttling over the course of a 90+ second static-fire test in McGregor, Texas. (SpaceX)

Given recent reports from Reuters that Musk has demanded that SpaceX’s Starlink team work towards the first launch of an operational batch of satellites by mid-2019, his target date for a mini-BFS Falcon 9 upper stage is likely no coincidence. Given the potential risk of being the first to launch on an unproven variant of Falcon 9, it’s possible (if not probable) that SpaceX will conduct its own launch of the rocket prior to flying paying customers – a perfect way to avoid wasting that launch would be risking a few of SpaceX’s own Starlink satellites in place of a customer’s payload.

Musk seems to be confident that SpaceX has effectively ‘solved’ propulsive rocket landings, stating that the purpose of this new variant will be dedicated to testing an “ultra light heat shield and high Mach control surfaces”. Judging from a number of recent job postings focused on new thermal protection systems (and affixing them to composite structures) and an official request for information (RFI) from NASA Ames about its lightweight TUFROC heat shield material, this is a major focus and one of several critical paths for BFR development.


For prompt updates, on-the-ground perspectives, and unique glimpses of SpaceX’s rocket recovery fleet check out our brand new LaunchPad and LandingZone newsletters!

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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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SpaceX posts Starship booster feat that’s so nutty, it doesn’t even look real

The Super Heavy booster’s feat was so impressive that the whole maneuver almost looked like it was AI-generated.

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Credit: SpaceX/X

SpaceX has shared a video of a remarkable feat achieved by Starship’s Super Heavy booster during its 11th flight test.

The Super Heavy booster’s feat was so impressive that the whole maneuver, which was captured on video, almost looked like it was AI-generated.

Super Heavy’s picture perfect hover

As could be seen in the video shared by SpaceX, Starship’s Super Heavy booster, which is nearly 400 feet tall, smoothly returned to Earth and hovered above the Gulf of America for a few seconds before it went for its soft water landing. The booster’s picture-perfect maneuver before splashing down all but capped a near-flawless mission for Starship, which is about to enter its V3 era with Flight 12.

The booster’s balance and stability were so perfect that some users on X joked that the whole thing looked AI-generated. Considering the size of Super Heavy, as well as the fact that the booster was returning from space, the hovering display all but showed that SpaceX is dead serious about keeping its dominant lead in the spaceflight sector.

Starship V2’s curtain call

As noted in a Space.com report, Flight Test 11 achieved every major goal SpaceX had set for the mission, including deploying Starlink mass simulators, relighting Raptor engines in space, and executing a stable reentry for both the Starship Upper Stage and the Super Heavy booster. The feat also marked the second time a Super Heavy booster has been reflown, a milestone in SpaceX’s quest to make the entire Starship system fully reusable.

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Starship’s V2 vehicle will now give way to the upgraded Starship V3, which is designed for faster turnaround and higher payload capacity. The Starship program is expected to pursue even more aggressive targets in the coming months as well, with Elon Musk stating on social media platform X that SpaceX will attempt a tower catch for Starship Upper Stage as early as spring 2026.

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Elon Musk

Starship’s next chapter: SpaceX eyes tower catch after flawless Flight 11

Elon Musk has revealed the tentative timeframe for Starship’s next milestone that would push the spacecraft’s reusability to a whole new level. 

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Credit: SpaceX

Elon Musk has revealed the tentative timeframe for Starship’s next milestone that would push the spacecraft’s reusability to a whole new level. 

Following Flight 11’s flawless mission, Musk noted on X that SpaceX will be aiming to catch the Starship Upper Stage with its launch tower as early as spring 2026. This should pave the way for SpaceX to start optimizing Starship for maximum reusability.

Flight 11 closes the Starship V2 chapter on a high note

Starship’s eleventh flight, which launched from Starbase, Texas, achieved every major mission objective. The Super Heavy booster completed a successful ascent, hover, and soft splashdown in the Gulf of America, while the upper stage executed an orbit burn, deployed Starlink simulators, and returned with a controlled reentry over the Indian Ocean.

This mission officially closed the chapter on the second-generation Starship and first-generation Super Heavy booster, and it set the stage for a redesigned vehicle built for orbital payload missions, propellant transfer, and beyond. It should be noted that Elon Musk has mentioned on X that Starship V3, at least if things go well, might be capable of reaching Mars.

Elon Musk confirms tower catch attempt set for spring

After Flight 11’s success, Musk confirmed that SpaceX will attempt to catch the Starship Upper Stage with its launch tower arms, fondly dubbed by the spaceflight community as “chopsticks,” in the coming months. Musk’s announcement came as a response to an X user who asked when the tower could start catching the Starship Upper Stage. In his reply, Musk simply wrote “Springtime.” 

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Starship’s reusability is a key feature of the spacecraft, with SpaceX aiming to achieve a launch cadence that is almost comparable to conventional aircraft. For such a scenario to be feasible, launch tower catches of both Starship’s Upper Stage and its Super Heavy booster have to be routine.

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SpaceX is preparing to launch Starship V2 one final time

The mission will test reentry dynamics, new landing burn configurations, and heat-shield upgrades.

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Credit: SpaceX/X

SpaceX is preparing to launch its final Starship V2 rocket on October 13, 2025. The launch closes the curtain on Starship V2 and marks the start of the ambitious spacecraft’s V3 era. 

Liftoff for Flight 11 is scheduled for 7:15 p.m. ET from Starbase in South Texas, with a 75-minute launch window. The mission will test reentry dynamics, new landing burn configurations, and heat-shield upgrades ahead of the transition to the next-generation Starship V3.

Starship V3 and beyond

Elon Musk confirmed on X that Starship V3 is already in production and could be “built & tested” and perhaps even flown before the end of 2025. The new version is expected to feature major performance and scale improvements, with Musk stating that Starship V3, provided that things go well, might be capable of reaching Mars, though V4 is more likely to perform a full-scale mission to the red planet. 

“Only one more V2 left to launch,” Musk wrote back in August following Starship’s successful Flight 10 mission. In another post, Musk stated that “Starship V3 is a massive upgrade from the current V2 and should be through production and testing by end of year, with heavy flight activity next year.”

Starship V2’s final mission

Flight 11 is designed to push the limits of Starship V2. SpaceX engineers have intentionally removed heat-shield tiles in vulnerable areas to analyze how the vehicle handles atmospheric reentry under stress, as noted in a Space.com report. The test will also refine subsonic guidance algorithms and new landing burn sequences for the Super Heavy booster that would be used for Starship V3.

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“Super Heavy will ignite 13 engines at the start of the landing burn and then transition to a new configuration with five engines running for the divert phase. Previously done with three engines, the planned baseline for V3 Super Heavy will use five engines during the section of the burn responsible for fine-tuning the booster’s path, adding additional redundancy for spontaneous engine shutdowns. 

“The booster will then transition to its three center engines for the end of the landing burn, entering a full hover while still above the ocean surface, followed by shutdown and dropping into the Gulf of America,” SpaceX wrote in a post on its official website.

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