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SpaceX CEO Elon Musk says Starship (BFS) hop tests could start in early 2019
SpaceX CEO Elon Musk has taken to Twitter to share an unexpected wealth of detail about the “radical” and largely unpublicized design changes the company’s Starship and Super Heavy (BFS & BFB) have undergone in 2018.
Beside information ranging from discussions of metallurgy to overall design philosophy and comparisons, the eccentric CEO also offered the most concrete target yet for the beginning of prototype spaceship (BFS/Starship) hop tests in South Texas – “March/April [2019]”.
I will do a full technical presentation of Starship after the test vehicle we’re building in Texas flies, so hopefully March/April
— Elon Musk (@elonmusk) December 22, 2018
On one hand, this expeditious new testing schedule – acknowledged by Musk himself to be “much sooner than expected” – is a thrilling prospect, given that it implies that a nearly full-scale prototype of Starship (or something vaguely approximating the spacecraft) could take its first baby steps into the air as early as the first quarter of 2019. On the other hand, however, this is an almost bafflingly large schedule change considering that SpaceX President and COO Gwynne Shotwell asserted that a prototype of BFS (now Starship) could begin “hopping” by late 2019, speaking in September 2018.
Shotwell: think we’ll be “hopping” the second stage of BFR (the BFS) late next year. #DARPA60
— Jeff Foust (@jeff_foust) September 6, 2018
Schedules (especially aerospace program schedules) do certainly tend to be chaotic and jumpy, but it’s almost inconceivable that any given project – regardless of the scope or scale – could wind up reaching completion nine months earlier than previously forecasted without suffering one or several dramatic compromises, typically involving lower-fidelity testing and prototypes or watered-down deliverables. It’s unclear if BFR has suffered the same fate, but – to put it lightly – the South Texas sight greeting the eyes of close followers of SpaceX’s BFR program is downright unbelievable.
BFWhat?!
Given the very recent and conspicuous additions of triangular appendages that look precisely like rudimentary fins and an obvious nose cone assembly, the only possible conclusion to draw from photos of SpaceX’s Boca Chica facilities taken in the last week or two is that the company (and/or contractors) are busy building something related to Starship. At least in these early stages, the… thing being built could be best described as what might come to mind if you asked an imaginative kid to build a full-scale sculpture of Tintin’s spaceship on a budget of maybe $500,000.
You got something to show us in Texas? pic.twitter.com/vBF0WwwIfF
— Robotbeat🗽 ➐ (@Robotbeat) December 22, 2018
More likely than not, this could be a case of things being more than they seem. To most, it may almost look like an elaborate prank, but that assumes that we know the full story and have a decent working understanding of aerospace prototyping. For the vast majority of us, that is simply not the case – what looks like a spade is probably not a spade.
At the end of the day, the most basic of observations – that this purported ‘Starship prototype’ will begin hop tests with extraordinarily powerful Raptor engines installed as few as three months from now – suggest that this spooky metal contraption will be used to conduct the most basic of Starship tests. As such, it will probably never travel much faster than Falcon 9’s Grasshopper and F9R predecessors, which tended to gently accelerate from the ground to as high as a kilometer or two before slowly heading back down for a powered landing.
- What now seem to be extremely rough fin outlines were welded to the main steel cylinder like giant metal straws. (bocachicagal – NASASpaceflight)
- ¯\_(ツ)_/¯ (bocachicagal – NASASpaceflight)
- SpaceX recovery technicians work on Falcon 9 with similar cherry-picker lifts, offering a sense of scale of the new Starship water tower. (Pauline Acalin)
- A conspicuous nosecone appears to have arisen inside SpaceX’s new Boca Chica tent, adjacent to what looks like a water tower with tube legs. (bocachicagal – NASASpaceflight)
- (bocachicagal – NASASpaceflight)
Given that SpaceX has already refined this complex and challenging task to a reliable science with Falcon 9 and Merlin 1D, it’s unclear why a very similar test campaign would be of serious value to the company without simultaneously testing full-fidelity control surfaces (fins), exotic new stainless steel propellant tank technologies, and more. Perhaps SpaceX just really wants to ensure that Starship will be capable of landing and taking off from an unprepared and angled surface of the type it could (will?) experience on Mars. Maybe the company simply wants to have a bare-minimum flying platform capable of testing and refining multi-engine configurations of Raptor.

All that can be said for sure at the moment is that the public simply does not have the full story to explain the moderately shocking activity going on in Boca Chica. Musk did state that he would provide another technical update on the status of Starship and the BFR program as a whole in the first half of 2019, but only after the first Starship hopper flights have begun. It would seem that those on the sidelines will simply have to wallow in confusion and wild speculation for another ~3-4 months at minimum, hopefully only going moderately insane as a result.
In the meantime, copious thanks are owed to NASASpaceflight members bocachicagal and Nomadd for their relentless and thorough coverage of SpaceX’s activities in the obscure far south of the Texan coast, as well as their courteous permission for media outlets like Teslarati to republish their photos. Cheers!
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!
Elon Musk
Tesla shows what Roadster drivers will see on screen before thruster activation
Tesla’s Roadster video reveals a fighter jet inspired cockpit with a 5,500 PSI thruster gauge.
Tesla has given future owners their clearest look yet at the cockpit of its next generation Roadster. In a 34 second video posted to X on Friday afternoon, the company walked through the car’s touchscreen with a caption: “Inspired by fighter jet cockpits, Roadster’s interface was designed around the pilot.”
The clip opens on a black screen with red graphics and a 3D wireframe of the car, which sits beside the Roadster’s squared off yoke. Tapping parts of the model brings up controls for the rear wing, including low drag and high downforce positions, along with a charging page with a charge limit bar and a small music player. A row of tabs along the bottom reads Home, Vehicle, Listen, Climate and Navigate.
Most of the video is spent in Track Mode. The dashboard shows a live circuit map, a list of session lap times, brake and motor temperatures, and pressure and temperature readouts for each tire. A setup page lets the driver pick Auto, Low Drag, High Downforce or Custom aero modes, adjust aero balance and brake balance, and switch stability and traction control off. Along the bottom, a status bar reads “Thruster · 5,500 PSI” next to a “Boost Ready” indicator.
That gauge ties the software to the hardware Tesla showed off near Waco, Texas on October 15. The Thrust and Rocket versions use cold gas thrusters fed by carbon overwrapped pressure vessels, and Tesla lists 0 to 60 mph times of under 0.9 seconds and under 0.59 seconds for them, as Teslarati detailed in its breakdown of the three Roadster configurations. The base Performance car relies on a fan and ground sealing system for grip, and the aero settings on screen match the active wings and suction setup covered in our look at how the Roadster generates downforce.
The Roadster layout is a departure from the rest of Tesla’s lineup. Instead of a map centered screen, the Roadster puts the car itself at the center of the home page, and Tesla’s Roadster page lists two smaller forward displays alongside the main touchscreen. Tesla has not said whether any of the Track Mode telemetry will make its way to the Model 3 Performance or other vehicles.
The interface could still change before deliveries. Elon Musk said at the event that Roadster production will begin in 2028, and Tesla says the flagship Rocket version is not approved for public road use. Reservations are open with a $50,000 payment, while Thrust is listed as a limited release and Rocket is invite only.
Those who want to see the car in person will get their first chance this weekend. The Roadster goes on display in the lobby of the Petersen Automotive Museum in Los Angeles from October 24 to 27, according to Sawyer Merritt, the first time the public will be able to view it up close.
Elon Musk
Tesla reveals Optimus Academy, where robots teach themselves
Tesla has begun building production quality Optimus robots in Fremont and revealed its training plan.
Tesla has started building Optimus on the high volume line it set up inside its Fremont factory, and the company says the robots coming off it are the first that meet the bar for a real product. “The bots coming off this line are the first production-quality bots that we have manufactured,” Tesla wrote in its third quarter shareholder letter, adding that it has “proven that the current manufacturing process for Optimus is suitable for a commercial product.”
The line sits in space that built the Model S and Model X until this spring. Tesla cleared the old vehicle line in 46 days, as Teslarati reported in July, to make room for robot production sized for one million units a year. On Wednesday’s earnings call, Elon Musk said most of the equipment for that capacity is already in Fremont, with output set to climb toward roughly 20,000 robots a week as the line ramps.
Musk described the ramp as a classic S curve. “The growth of Optimus is an S curve, but the initial curve is a shallow slope,” he said. The team is now refining the robot’s AI, electromechanical design, reliability and service life, and Musk expects that work to be finished by the end of next year, when Tesla plans to start delivering Optimus to outside companies for dangerous, repetitive and around the clock jobs.
The most interesting part of the call was how Tesla plans to teach the robots. Its cars send real driving data back to the AI team from millions of vehicles, but Optimus has no fleet like that yet. “A big difference with Optimus versus the cars is we don’t have this vast fleet of cars from which we can gather training data,” Musk said. Tesla’s answer is an Optimus Academy, where 10,000 to 20,000 robots will practice a wide range of tasks and feed what they learn into the next version of the model. Every unit off the Fremont line becomes a source of that training data.
Smarter hardware is on the way too. Tesla plans to put its AI5 chip into Optimus next year, and Musk said a new Optimus video should arrive within one or two months showing the robot completing tasks driven by AI rather than preprogrammed motions. He took aim at rival humanoid demos that only run scripted routines, saying those would not hold up in the real world.
The supply chain is lining up behind the program. In September, Tesla certified Tuopu, Joyson and Sanhua as mass production partners for Optimus components. A far larger Optimus factory is also rising at Giga Texas, where drone footage from Joe Tegtmeyer showed the steel frame nearing completion, and Musk has pegged that plant’s long term target at 10 million robots a year.
Tesla executives also said Optimus production costs are trending toward the expected manufacturing cost of Cybercab, a sign the robot is being engineered for volume from the start. The hands remain the toughest piece of the design, a point Musk also made at the X Takeover event earlier this month, as Teslarati covered at the time, and that is where much of the current engineering effort is focused.
Elon Musk
The Starship moon landing number NASA and Elon Musk can’t agree on
Musk disputes NASA estimate of 22 Starship launches for Moon landing, predicting 6 to 8.
Elon Musk is disputing a new NASA safety panel estimate of how many Starship launches it will take to put astronauts on the Moon, saying the real number will be less than half the panel’s figure.
On Thursday, NASA’s Aerospace Safety Advisory Panel held its quarterly public meeting. Panel member Charlie Precourt, a former NASA astronaut, flagged the fueling process for SpaceX’s lunar lander as a major risk for Artemis IV, the mission planned to land a crew on the Moon in 2028. “We need to keep our eyes on numerous required fuelings for the lander,” Precourt said, according to Ars Technica. “I think the last estimate is around 22 flights.”
Ars Technica’s Eric Berger posted the comment on X, and Musk replied. “That’s way too high,” Musk wrote. “Actual number will be more like 6 to 8.”
The disagreement comes down to a basic problem with sending a ship as large as Starship to the Moon. Starship burns nearly all of its propellant just reaching Earth orbit, so it cannot continue on to the Moon without stopping for a refill. SpaceX’s answer is a gas station in space. First, a Starship that works as a storage tank, called a depot, is launched into orbit. Then a series of tanker Starships launch one at a time, dock with the depot and pump their leftover propellant into it. Once the depot is full, the lunar lander version of Starship launches, docks, fills up and heads for the Moon.
Every tanker trip is its own full rocket launch, which is why the count matters. More launches mean more time, more cost and more chances for something to go wrong before astronauts ever leave Earth. Berger estimated that even if SpaceX reaches twice weekly Starship launches by the end of 2027, filling a depot at the panel’s number would still take roughly three months.
How many tankers are needed depends mostly on how much propellant each one can carry to orbit and how much is lost along the way. Starship’s fuel and oxygen are stored at extremely cold temperatures, and some of it slowly boils off while waiting in orbit. More is lost in each transfer. NASA appears to be working from what Starship can lift today, while Musk’s range assumes a more capable rocket.
Musk has pushed back on higher counts before. In 2021, after a government document suggested 16 launches, he called that “extremely unlikely” and said eight tankers would be the most required.
Much of the answer depends on hardware SpaceX has not finished flying. As Teslarati noted earlier this year, the company plans to carry out the refueling process with its upgraded V3 Starship, and Precourt described Artemis IV as carrying “a large number of firsts.” He also praised NASA Administrator Jared Isaacman’s team for working to clear obstacles for both SpaceX and Blue Origin, whose Blue Moon lander does not rely on orbital refueling for its first mission.




