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SpaceX to livestream Falcon Heavy Block 5 launch debut at 6:15pm ET today

SpaceX CEO Elon Musk celebrates the success of Falcon Heavy's 2018 launch debut. (SpaceX/National Geographic)

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SpaceX is half a day away from the planned launch debut of Falcon Heavy Block 5, a milestone that will also be the rocket’s second launch ever and first mission with a commercial payload.

First and foremost, Falcon Heavy’s job is to safely place the Saudi Arabian communications satellite Arabsat 6A into a high-energy geostationary transfer orbit (GTO) more than 35,000 km (~22,000 mi) above Earth’s surface. Despite the satellite weighing no less than 6000 kg (13,200 lb), Falcon Heavy will still have enough latent performance to attempt the recovery of all three of its new Block 5 boosters. With any luck, this will hopefully return SpaceX’s East Coast landing zones (LZ-1 and LZ-2) to successful operations after an anomaly in December 2018 caused Falcon 9 B1051 to landing a mile or so offshore.

This time around, Falcon Heavy will be made entirely out of Block 5 hardware, including three new boosters (likely B1052, B1053, and B1055), a Block 5 upper stage with a Merlin Vacuum engine, and a recovery-optimized “Version 2” payload fairing. Altogether, Falcon Heavy likely weighs upwards of 80,000 kg (175,000 lb) empty and more than 1,420 metric tons (3,125,000 lb) when fully fueled. At liftoff, the Falcon Heavy Block 5 rocket’s 27 Merlin 1D engines are expected to produce no less than 5.1 million pounds (~2300 mT/23,000 kN) of thrust at full throttle, but that figure could rise as high as 5.6 million pounds (2550 mT/25,500 kN) of thrust depending on how one interprets rather vague official numbers from CEO Elon Musk.

Regardless, both Falcon Heavy side boosters will attempt to repeat the iconic side-by-side landings that are now a signature of the rocket’s 2018 launch debut, while the center core – traveling much faster at the point of stage separation – will travel nearly 1000 km (620 mi) downrange for a landing aboard drone ship Of Course I Still Love You (OCISLY). Ranging from multiple sonic booms that will be audible for miles up and down the Florida coast and the potential to a potentially spectacular Florida sunset as a backdrop, Falcon Heavy’s second launch will be an event worth watching.

The first Block 5 version of Falcon Heavy prepares for its launch debut. The rocket is comprised of three first stage boosters, likely B1052, B1053, and B1055. (SpaceX)

Falcon Heavy Flight 2 is made even more exciting by the fact that both of its Block 5 side boosters will be instrumental to a planned third launch of the SpaceX rocket as few as two months later. According to the US Air Force, an agreement was reached with SpaceX to use the opportunity – an intentionally low-risk mission known as Space Test Program 2 (STP-2) – to gain a much higher-fidelity understanding of how SpaceX launches, lands, refurbishes, and relaunches Falcon boosters. Aside from being the last major source of data for the ultimate certification of Falcon Heavy for high-value military launches, the USAF hopes that STP-2 will be a critical step towards opening the doors of launch contract competitions to flight-proven rockets like Falcon 9 and – eventually – Blue Origin’s New Glenn.

SpaceX’s launch webcast will go live approximately 20 minutes before liftoff, with the window stretching from 6:35 pm to 8:31 pm EDT (22:35-00:31 UTC). Weather is expected to be decent and is currently holding around 80% “go” for launch.

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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

Elon Musk gives nod to SpaceX’s massive, previously impossible feat

It was the booster’s 30th flight, a scenario that seemed impossible before SpaceX became a dominant force in spaceflight. 

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Credit: SpaceX/X

Elon Musk gave a nod to one of SpaceX’s most underrated feats today. Following the successful launch of the Transporter-15 mission, SpaceX seamlessly landed another Falcon 9 booster on a droneship in the middle of the ocean. 

It was the booster’s 30th flight, a scenario that seemed impossible before SpaceX became a dominant force in spaceflight. 

Elon Musk celebrates a veteran Falcon 9 booster’s feat

SpaceX completed another major milestone for its Smallsat Rideshare program on Friday, successfully launching and deploying 140 spacecraft aboard a Falcon 9 from Vandenberg Space Force Base. The mission, known as Transporter-15, lifted off two days later than planned after a scrub attributed to a ground systems issue, according to SpaceFlight Now. SpaceX confirmed that all payloads designed to separate from the rocket were deployed as planned.

The Falcon 9 used for this flight was booster B1071, one of SpaceX’s most heavily flown rockets. With its 30th mission completed, it becomes the second booster in SpaceX’s fleet to reach that milestone. B1071’s manifest includes five National Reconnaissance Office missions, NASA’s SWOT satellite, and several previous rideshare deployments, among others. Elon Musk celebrated the milestone on X, writing “30 flights of the same rocket!” in his post. 

Skeptics once dismissed reusability as unfeasible

While rocket landings are routine for SpaceX today, that was not always the case. Industry veterans previously questioned whether reusable rockets could ever achieve meaningful cost savings or operational reliability, often citing the Space Shuttle’s partial reusability as evidence of failure. 

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In 2016, Orbital ATK’s Ben Goldberg argued during a panel that even if rockets could be reusable, they do not make a lot of sense. He took issue with Elon Musk’s claims at the time, Ars Technica reported, particularly when the SpaceX founder stated that fuel costs account for just a fraction of launch costs. 

Goldberg noted that at most, studies showed only a 30% cost reduction for low-Earth orbit missions by using a reusable rocket. “You’re not going to get 100-fold. These numbers aren’t going to change by an order of magnitude. They’re just not. That’s the state of where we are today,” he said. 

Former NASA official Dan Dumbacher, who oversaw the Space Launch System, expressed similar doubts in 2014, implying that if NASA couldn’t make full reusability viable, private firms like SpaceX faced steep odds.

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SpaceX’s Starship program is already bouncing back from Booster 18 fiasco

Just over a week since Booster 18 met its untimely end, SpaceX is now busy stacking Booster 19, and at a very rapid pace, too. 

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Credit: SpaceX/X

SpaceX is already bouncing back from the fiasco that it experienced during Starship Booster 18’s initial tests earlier this month.

Just over a week since Booster 18 met its untimely end, SpaceX is now busy stacking Booster 19, and at a very rapid pace, too. 

Starship V3 Booster 19 is rising 

As per Starbase watchers on X, SpaceX rolled out the fourth aft section of Booster 19 to Starbase’s MegaBay this weekend, stacking it to reach 15 rings tall with just a few sections remaining. This marks the fastest booster assembly to date at four sections in five days. This is quite impressive, and it bodes well for SpaceX’s Starship V3 program, which is expected to be a notable step up from the V2 program, which was retired after a flawless Flight 11. 

Starship watcher TankWatchers noted the tempo on X, stating, “During the night the A4 section of Booster 19 rolled out to the MegaBay. With 4 sections in just 5 days, this is shaping up to be the fastest booster stack ever.” Fellow Starbase watcher TestFlight echoed the same sentiments. “Booster 19 is now 15 rings tall, with 3 aft sections remaining!” the space enthusiast wrote. 

Aggressive targets despite Booster 18 fiasco

SpaceX’s V3 program encountered a speed bump earlier this month when Booster 18, just one day after rolling out into the factory, experienced a major anomaly during gas system pressure testing at SpaceX’s Massey facility in Starbase, Texas. While no propellant was loaded, no engines were installed, and no one was injured in the incident, the unexpected end of Booster 18 sparked speculation that the Starship V3 program could face delays.

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Despite the Booster 18 fiasco, however, SpaceX announced that “Starship’s twelfth flight test remains targeted for the first quarter of 2026.” Elon Musk shared a similar timeline on X earlier this year, with the CEO stating that “ 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.”

Considering that Booster 19 seems to be moving through its production phases quickly, perhaps SpaceX’s Q1 2026 target for Flight 12 might indeed be more than feasible.

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Elon Musk shares SpaceX’s directive that destroys a prevalent media narrative

Musk’s comments followed Starlink’s initiatives for people affected by severe flooding in Indonesia and Cyclone Ditwah in Sri Lanka.

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UK Government, CC BY 2.0 , via Wikimedia Commons

Elon Musk recently shared SpaceX’s standing policy to offer free Starlink service during natural disasters worldwide, highlighting the company’s commitment to pursue aid over profit during times of need. 

Musk’s comments followed Starlink’s initiatives for people affected by severe flooding in Indonesia and Cyclone Ditwah in Sri Lanka.

Starlink activates free service in Indonesia and Sri Lanka

Starlink recently announced free service for those impacted by severe flooding in Indonesia’s Sumatra region, partnering with the government to deploy terminals rapidly to the hardest-hit areas. The offer extends to new and existing customers through December, restoring connectivity in zones where traditional networks have failed due to infrastructure damage.

Musk quoted the post on X, writing, “SpaceX standard policy is to make Starlink free whenever there is a natural disaster somewhere in the world. It would not be right to profit from misfortune.”

Starlink extended the same relief to Sri Lanka amid Cyclone Ditwah, coordinating with local authorities for additional support. The cyclone battered the island nation with heavy rains and winds, disrupting communications for thousands. Free access also lasts until year-end, emphasizing Starlink’s role in bridging gaps during crises.

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“For those affected by the severe flooding in Indonesia and Sri Lanka in the aftermath of Cyclone Ditwah, Starlink is providing free service to new and existing customers through the end of December 2025. We’re also working with the Indonesian government to rapidly deploy terminals and restore connectivity to the hardest-hit areas on Sumatra, as well as with the Sri Lankan government to provide additional assistance,” Starlink wrote in a post on its official website. 

Musk’s companies routinely provide aid

Musk’s firms have a track record of providing critical support in crises, often without fanfare, challenging portrayals of him as a comic book villain intent on enriching himself on the backs of a suffering populace. In January 2024 alone, Tesla opened Superchargers for free in Japan’s Hokuriku region after a magnitude 7.6 earthquake killed at least 55 and injured hundreds.

Similar efforts include Starlink deployments for the 2023 Maui wildfires, 2024 Hurricane Helene in North Carolina, and floods in Texas, where the service was used to help facilitate emergency coordination. These actions, which total millions in waived fees and logistics, demonstrate a proactive ethos among Musk’s companies, with Musk noting in past interviews that such aid stems from engineering solutions over optics.

The initiatives also provide a direct rebuttal of Musk’s characterization on mainstream media, which tends to lean negatively. This has become much more notable in recent years as Musk adopted more conservative policies. These negative sentiments came to a head earlier this year when Tesla stores, vehicles, and even some owners, were attacked during waves of anti-Tesla protests.

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