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SpaceX CEO Elon Musk posts uncut Raptor, drone videos of Starhopper’s flight test debut
Some two hours after Starhopper’s inaugural untethered flight, SpaceX CEO Elon Musk took to Twitter to post an uncut video showing the ungainly rocket’s launch and landing from the perspective of both a drone and Starhopper’s lone Raptor engine.
As noted by commenters, Starhopper’s first flight also marks perhaps an even more fascinating milestone: it’s technically the first launch ever of a full-flow staged-combustion (FFSC) rocket engine. Whether or not the development hell Raptor required is or was worth it to SpaceX, the company has become the first and only entity on Earth to develop and fly a FFSC engine, beating out the national space agencies of both the United States and Soviet Union, both of which built – but never flew – prototypes.
Instead of inexplicably shelving a mature prototype development and test program, SpaceX iterated through several subscale Raptor prototypes, test-fired the engines for more than 1200 seconds total, used that data to design and build full-scale Raptors, and finally sped into a hardware-rich test campaign with six (soon to be seven) new engines. After SpaceX settled on a full-flow staged-combustion cycle and methane/oxygen (methalox) propellant, Raptor conducted its first full-scale tests all the way back in 2014, performing preburner flow and ignition tests at NASA’s Stennis Space Center.
Two years and many additional subcomponent tests later, SpaceX successfully performed the inaugural static fire test of its first completed subscale Raptor, a huge milestone for any rocket engine. In the 12 months following its first static fire (September 2016), SpaceX performed dozens of static fire tests with several subscale engines, putting the new propulsion system through >1200 seconds of combined testing.
A year after that, SpaceX was still testing subscale engines but the first full-scale Raptor engine was just a few months away from completing assembly in Hawthorne and heading to McGregor to kick off full-scale static fire testing. Indeed, four months after CEO Elon Musk’s September 2018 update, Raptor serial number 01 (SN01) shipped to Texas in late January and successfully ignited for the first time on February 3rd. SpaceX’s finalized full-scale Raptor engine is designed to produce more than 2000 kN (450,000 lbf, 200 tons) of thrust at full-throttle.
Since that inaugural ignition, SpaceX’s propulsion team – perhaps to their detriment, under orders from Musk – pushed SN01 and several of its successors to their limits as quickly as possible, resulting in severe, irreparable damage in several cases. On the other hand, the no-holds-barred, ‘hardware-rich’ (i.e. destructive) test program has allowed SpaceX to relatively quickly solve several major bugs that prevented the engine from passing longer test fires.
Raptor SN05 was originally expected to support Starhopper’s first flight(s) but had to be passed up after suffering damage in one of its final June 2019 acceptance tests. Raptor SN06 became the first engine – likely thanks to tweaks afforded by data gathered from its failed brethren – to pass all of those acceptance tests, leading to its eventual installation on Starhopper in early July.
Raptor’s impressive development culminated on July 25th with the engine’s first untethered flight while attached to Starhopper, a 9m-diameter (30 ft) low-fidelity prototype that is more or less a mobile test stand for the next-generation SpaceX engine. Raptor is now the only FFSC engine in history that has powered a flight-capable vehicle’s launch and landing, even if said flight featured an apogee of just 20-30 meters (65-100 ft).
“In full-flow staged combustion (FFSC), even more complexity is added as all propellant that touches the engine must necessarily end up traveling through the main combustion chamber to eke every last ounce of thrust out of the finite propellant a rocket lifts off with. As such, FFSC engines can be about as efficient as the laws of physics allow any given chemical rocket engine to be, at the cost of exceptional complexity and brutally difficult development.“
SpaceX delays Starhopper’s first flight a few days despite Raptor preburner test success
For more on what exactly makes full-flow staged-combustion engines uniquely capable and challenging to develop, the subject has been covered at length in past Teslarati articles.
According to Musk, the next major challenge facing Starhopper and (presumably) Raptor SN06 is far more ambitious 200-meter (650 ft) hop and flight test that could happen as soon as the first half of August.
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Starlink to launch on United Airlines planes by May 15
Select United Airlines passengers will get free Starlink internet, with 200+ Mbps speeds. Early testers streamed MLB & live news with ease.

Starlink will launch on United Airlines planes by May 15, 2025, providing select passengers with free internet inflight.
Recently, Sean Cudahy from The Points Guy tried out United Airlines’ free Starlink Wi-Fi. The airline invited a few media to try out Starlink Aviation Wi-Fi before its official launch.
According to Cudahy, connecting to Starlink was easy. All he had to do was take out his phone and connect to the Unitedwifi.com network, which took him to a landing page. Once he clicked “get started” on the landing page, it opened the United mobile app on his phone.
The United app verified Cudahy’s status as a MileagePlus member. After that, all he had to do was click on “connect,” and he was all set. Starlink’s speed was reliable and just what passengers would need on a long flight.
“I ran a speed test, and it clocked the Wi-Fi at 217 Mbps of download speed, and 26.8 Mbps of upload speed,” noted Cudahy.
Cudahy added that connection to Starlink Wi-Fi on his other devices, like his tablet, was easier. All he had to do was scan a QR code on his phone from his tablet.
“United certainly isn’t exaggerating on the speed of the service: I was able to simultaneously watch a live news feed about the selection of a new Pope on one device, and stream a live Major League Baseball game on another,” The Points Guy noted in his review of Starlink Aviation.
United Airlines is offering Starlink services for free to MileagePlus members. Based on Cudahy’s experience, it’s best to download the United mobile app before your flight.
United Airlines expects to equip all 300 of its Embraer 175 planes with Starlink by the end of the year. It plans to install 40 regional jets with Starlink equipment every month.
Last month, the Federal Aviation Administration (FAA) approved United Airlines’ Starlink-equipped planes. United plans to roll out Starlink Wi-Fi across all its flights. It is currently working to receive FAA approval to install Starlink equipment on over 16 aircraft models.
News
Ark Invest sees potential in xAI as the world adopts more AI models
Ark’s new stake in xAI bets on Musk’s future plans. Will the newly merged companies deliver the next AI breakthrough?

Ark Invest reinvested in X Corp in Q1 2025 through its Ark Venture Fund, which converted into a position in xAI, Elon Musk’s artificial intelligence company.
In March, xAI acquired X, intertwining the two companies’ futures. The stock merger values xAI at $80 billion and X at $33 billion. After xAI acquired X, Elon Musk noted that the combined company would unlock “immense potential.” Ark Invest believes in Musk’s vision for xAI and X Corp.
“…the deal created a new combined entity called XAI Holdings Corp., a strategic union that integrates xAI’s cutting-edge foundational models with X’s massive user base of over 600 million strong to unlock a platform that blends real-time communication with AI-enhanced discovery, truth-seeking, and personalized knowledge delivery.
“We believe this merger will be a significant catalyst for consumer AI adoption and foundational model monetization,” Ark noted.
Musk is reportedly planning a valuation adjustment for xAI. CNBC’s David Faber noted in April that Musk hinted at a new funding round for his artificial intelligence startup during an investor call.
The merger supports Musk’s vision to transform X into an “everything app,” where people can communicate, make monetary transactions, catch up on news, and more. xAI is already working on providing financial services. It recently partnered with TWG Global and Palantir to integrate AI with financial services.
In addition, XAI Holdings also has X Money, a payment system that could rival Venmo, Zelle, and Apple Pay. X Corp. secured a Visa partnership in January and money-transmitter licenses in 42 states, including California, in September 2024.
X Money faces opposition in New York from Manhattan Democrats Assemblymember Micah Lasher and state Sen. Brad Hoylman-Sigal, who sent a letter Monday to the state’s Department of Financial Services, urging rejection of X Corp.’s money-transmitter license. The lawmakers cited Musk’s leadership as a risk to consumer data and financial infrastructure.
Ark’s investment in xAI underscores confidence in its AI-driven future, amplified by the XAI Holdings merger. As xAI leverages X’s platform to scale AI innovation, Ark’s stake positions it to benefit from a transformative shift in consumer AI and fintech, despite ongoing challenges.
News
Starlink Direct to Cell to boost remote businesses in Chile
Entel teams up with Starlink Direct to Cell to power SMEs & industries in Chile’s remote regions. Remote businesses get a major tech upgrade.

Entel will provide Starlink Direct to Cell services to businesses in Chile and Peru, boosting connectivity in underserved regions.
Entel is Chile’s leading telecommunications provider. Its strategic collaboration leverages Starlink’s Direct to Cell service by offering advanced internet solutions to small and medium-sized enterprises (SMEs) and large corporations.
The partnership targets industries like mining, agriculture, and forestry, which often face connectivity challenges in remote areas. By tapping into Starlink’s low-latency satellite constellation, Entel aims to bridge these gaps, driving innovation and competitiveness.
The collaboration with Entel follows Starlink’s April expansion in Brazil, where its internet was integrated into John Deere’s agricultural equipment. Through its mobile app, Starlink provided Brazilian farmers with live video feeds, sensor data, and real-time sharing.
Entel’s Starlink Direct to Cell service includes value-added features such as 24/7 network monitoring, proactive management, and dedicated technical support. An observability feature will allow businesses to track real-time connectivity performance through web or mobile applications, enhancing operational efficiency.
The service’s accessibility to SMEs is a key focus. Starlink Direct to Cell is expected to empower small businesses to engage in e-commerce, improve customer communication, and expand digital operations.
Starlink’s Direct to Cell expansion into Peru underscores Entel’s regional ambitions, positioning it as a leader in Latin America’s business connectivity landscape. While details of the Peruvian rollout remain forthcoming, the move aligns with the region’s post-COVID-19 economic recovery. Reliable internet is critical for businesses to adopt cloud-based technologies and access global markets.
Starlink’s growing influence in Latin America highlights its role in transforming connectivity for underserved areas. Entel’s partnership strengthens its portfolio and helps businesses navigate a digital economy. As industries in Chile and Peru leverage Starlink’s capabilities, the collaboration could set a precedent for regional telecom providers, fostering innovation and economic growth across diverse sectors.
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