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DeepSpace: Firefly’s Alpha rocket to get a massive upgrade with ion thruster boost stage ⚡ ?

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Eric Ralph · June 18th, 2019

Welcome to the latest edition of DeepSpace! Each week, Teslarati space reporter Eric Ralph hand-crafts this newsletter to give you a breakdown of what’s happening in the space industry and what you need to know. To receive this newsletter (and others) directly and join our member-only Slack group, give us a 3-month trial for just $5.


Although the company quietly teased the concept for the first time several months ago, Firefly has released a detailed update on its Orbital Transfer Vehicle (OTV), an ambitious spacecraft meant to complement its Alpha and Beta launch vehicles. If Firefly can deliver on the independent spacecraft’s technical promises, the combination of Alpha (~$15M) and OTV could help usher in a new era of small, high-performance satellites launched on small, high-performance rockets.

In fact, Rocket Lab – currently the world’s only truly commercial smallsat launch provider – has already demonstrated the power of this new paradigm, albeit on a smaller scale. After just one failed attempt, the first successful orbital launch of the company’s Electron rocket also marked the surprise debut of a tiny third stage used to circularize the payload’s orbit. After five successful uses in orbit, Rocket Lab has taken its third stage a step further, adding redundant avionics, solar arrays, and more to effectively create an independent spacecraft/satellite bus called Photon. By all appearances, Firefly’s OTV is much larger than Photon but is functionally quite similar. By taking advantage of Alpha’s significant performance benefits compared to Electron, Firefly has designed a third stage/spacecraft capable of delivering hundreds of kilograms to geostationary orbit, the Moon, and (perhaps) beyond.

Changing the delta V game

  • Generally speaking, OTV is quite small. According to Firefly’s Payload User’s Guide, the spacecraft will weigh just 130 kg (285 lb) dry and will carry perhaps 30-70 kg of xenon fuel for its electric ion thrusters. This is a critical differentiator relative to Rocket Lab’s Photon and kick stage, which rely on the inefficient (but simple and reliable) Curie chemical rocket engine.
    • According to Firefly, Alpha is designed to launch a max of 1000 kg (2200 lb) to a 200 km (125 mi) low Earth orbit (LEO). Given OTV’s ~200 kg wet mass, Alpha + OTV offer some incredible capabilities relative to the rocket’s size and design.
    • Powerful electric thrusters undeniably add a lot of complexity to any spacecraft that chooses to use them but that pain is often deemed worth it for the benefits they can offer. Most notably, ion propulsion is extremely efficient.
This graph demonstrates the potential performance benefits of Alpha + OTV relative to Alpha on its own. (Firefly)
  • Thanks to OTV’s efficient electric thrusters and light carbon composite structure, the potential benefits of Alpha + OTV are hard to believe for a rocket as (relatively) small as Alpha.
  • On its own, Alpha can only deliver a meaningful payload (~100 kg) to perhaps 4000 km (2500 mi). With OTV, Alpha can suddenly deliver ~600 kg to a circular geostationary orbit (~36,000 km, 22,300 mi) and upwards of 400-500 kg into orbit around the Moon.
    • For reference, despite weighing around 10% of Falcon 9, Alpha and OTV would offer perhaps 10-15% the performance of Falcon 9 to trans lunar injection (TLI). This utterly defies the general rule of thumb that as a rocket gets significantly smaller, its performance (particularly to higher-energy orbits) deteriorates disproportionately.
  • With OTV, Alpha – nominally a ~$15M launch vehicle relegated to LEO payloads – becomes an incredibly intriguing option for small geostationary communications satellites and small-scale public and private exploration of the Moon, near Earth asteroids, and maybe even Mars/Venus.
  • According to a senior Firefly investor and board member, Firefly hopes to have OTV ready for its orbital debut on Alpha’s third launch, tentatively scheduled no earlier than mid-2020.

Alpha readies for launch

  • Of course, OTV is a bird without wings without Firefly’s Alpha launch vehicle. Weighing 54,000 kg (120,000 lb) fully-fueled, Alpha is a two-stage rocket that will stand 1.8m (6ft) wide and 29m (95ft) tall. Powered by four Reaver engines, the first stage will produce ~740 kN (166,000 lbf), approximately 85% of one of Falcon 9’s nine Merlin 1D engines.
  • Firefly is working relentlessly towards an ambitious December 2019 Alpha launch debut, a target that will probably slip into early 2020 due to the inherent complexity of the task at hand. Critically, though, Firefly has made a huge amount of progress towards that goal.
    • Notably, Firefly’s second stage – powered by one vacuum-optimized Lightning engine – has already been qualified for launch with full-duration static fires at the company’s Texas facilities. Firefly is in the midst of preparing for an identical series of qualification tests for its more powerful first stage, shown above in the form of one Reaver engine attached to an Alpha S1 thrust structure.
    • As early as July, a full set of four Reaver engines will be installed on the same thrust structure to perform static fire testing, much like SpaceX gradually added Merlin 1D engines during Falcon 9 development testing.
  • If all goes as planned, Firefly will have completed its first Alpha rocket – first stage, second stage, and payload fairing – by October or November 2019. Expect plenty of new photos and updates as Alpha nears its inaugural launch.
Thanks for being a Teslarati Reader! Become a member today to receive an issue of DeepSpace in your inbox each week!

– Eric

 

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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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Elon Musk’s X goes down as users report major outage Friday morning

Error messages and stalled loading screens quickly spread across the service, while outage trackers recorded a sharp spike in user reports.

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Credit: Linda Yaccarino/X

Elon Musk’s X experienced an outage Friday morning, leaving large numbers of users unable to access the social media platform.

Error messages and stalled loading screens quickly spread across the service, while outage trackers recorded a sharp spike in user reports.

Downdetector reports

Users attempting to open X were met with messages such as “Something went wrong. Try reloading,” often followed by an endless spinning icon that prevented access, according to a report from Variety. Downdetector data showed that reports of problems surged rapidly throughout the morning.

As of 10:52 a.m. ET, more than 100,000 users had reported issues with X. The data indicated that 56% of complaints were tied to the mobile app, while 33% were related to the website and roughly 10% cited server connection problems. The disruption appeared to begin around 10:10 a.m. ET, briefly eased around 10:35 a.m., and then returned minutes later.

Credit: Downdetector

Previous disruptions

Friday’s outage was not an isolated incident. X has experienced multiple high-profile service interruptions over the past two years. In November, tens of thousands of users reported widespread errors, including “Internal server error / Error code 500” messages. Cloudflare-related error messages were also reported.

In March 2025, the platform endured several brief outages spanning roughly 45 minutes, with more than 21,000 reports in the U.S. and 10,800 in the U.K., according to Downdetector. Earlier disruptions included an outage in August 2024 and impairments to key platform features in July 2023.

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Tesla wins top loyalty and conquest honors in S&P Global Mobility 2025 awards

The electric vehicle maker secured this year’s “Overall Loyalty to Make,” “Highest Conquest Percentage,” and “Ethnic Loyalty to Make” awards.

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Credit: Tesla Malaysia/X

Tesla emerged as one of the standout winners in the 2025 S&P Global Mobility Automotive Loyalty Awards, capturing top honors for customer retention and market conquest.

The electric vehicle maker secured this year’s “Overall Loyalty to Make,” “Highest Conquest Percentage,” and “Ethnic Loyalty to Make” awards.

Tesla claims loyalty crown

According to S&P Global Mobility, Tesla secured its 2025 “Overall Loyalty to Make” award following a late-year shift in consumer buying patterns. This marked the fourth consecutive year Tesla has received the honor. S&P Global Mobility’s annual analysis reviewed 13.6 million new retail vehicle registrations in the U.S. from October 2024 through September 2025, as noted in a press release.

In addition to overall loyalty, Tesla also earned the “Highest Conquest Percentage” award for the sixth consecutive year, highlighting the company’s continued ability to attract customers away from competing brands. This achievement is particularly notable given Tesla’s relatively small vehicle lineup, which is largely dominated by just two models: the Model 3 and Model Y.

Ethnic market strength and conquest

Tesla also captured top honors for “Ethnic Market Loyalty to Make,” a category that highlighted especially strong retention among Asian and Hispanic households. According to the analysis, Tesla achieved loyalty rates of 63.6% among Asian households and 61.9% among Hispanic households. These figures exceeded national averages.

S&P Global Mobility executives noted that loyalty margins across categories were exceptionally narrow in 2025, underscoring the significance of Tesla’s wins in an increasingly competitive market. Joe LaFeir, President of Mobility Business Solutions at S&P Global Mobility, shared his perspective on this year’s results.

“For 30 years, this analysis has provided a fact-based measure of brand health, and this year’s results are particularly telling. The data shows the market is not rewarding just one type of strategy. Instead, we see sustained, high-level performance from manufacturers with broad portfolios. In the current market, retaining customers remains a critical performance indicator for the industry,” LaFeir said.

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Elon Musk’s lawsuit against OpenAI and Microsoft is heading to jury trial

The ruling keeps alive claims that OpenAI misled the Tesla CEO about its charitable purpose while accepting billions of dollars in funding.

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Gage Skidmore, CC BY-SA 4.0 , via Wikimedia Commons

OpenAI Inc. and Microsoft will face a jury trial this spring after a federal judge rejected their efforts to dismiss Elon Musk’s lawsuit, which accuses the artificial intelligence startup of abandoning its original nonprofit mission. The ruling keeps alive claims that OpenAI misled the Tesla CEO about its charitable purpose while accepting billions of dollars in funding.

As noted in a report from Bloomberg News, a federal judge in Oakland, California, ruled that OpenAI Inc. and Microsoft failed to show that Musk’s claims should be dismissed. U.S. District Judge Yvonne Gonzalez Rogers stated that while the evidence remains unclear, Musk has maintained that OpenAI “had a specific charitable purpose and that he attached two fundamental terms to it: that OpenAI be open source and that it would remain a nonprofit — purposes consistent with OpenAI’s charter and mission.”

Judge Gonzalez Rogers also rejected an argument by OpenAI suggesting that Musk’s use of an intermediary to donate $38 million in seed money to the company stripped him of legal standing. “Holding otherwise would significantly reduce the enforcement of a large swath of charitable trusts, contrary to the modern trend,” Judge Gonzalez Rogers wrote.

The judge also declined to dismiss Musk’s fraud allegations, citing internal OpenAI communications from 2017 involving co-founder Greg Brockman. In an email cited by the judge, fellow OpenAI board member Shivon Zilis informed Musk that Brockman would “like to continue with the non-profit structure.”

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Just two months later, however, Brockman wrote in a private note that he “cannot say that we are committed to the non-profit. don’t want to say that we’re committed. if three months later we’re doing b-corp then it was a lie.”

Marc Toberoff, a member of Musk’s legal team, said Judge Gonzalez Rogers’s ruling confirms that “there is substantial evidence that OpenAI’s leadership made knowingly false assurances to Mr. Musk about its charitable mission that they never honored in favor of their personal self-enrichment.”

OpenAI, for its part, maintained that Musk’s legal efforts are baseless. In a statement, the AI startup said it is looking forward to the upcoming trial. “Mr. Musk’s lawsuit continues to be baseless and a part of his ongoing pattern of harassment, and we look forward to demonstrating this at trial. We remain focused on empowering the OpenAI Foundation, which is already one of the best-resourced nonprofits ever,” OpenAI stated.

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