Connect with us

SpaceX

SpaceX recycles Falcon Heavy’s commercial launch debut to Thurs – here’s why

The first Falcon Heavy Block 5 rocket prepares for its inaugural launch from Pad 39A, April 10th. (Pauline Acalin)

Published

on

SpaceX has scrubbed the first attempted launch of Falcon Heavy Flight 2 due to high upper-level winds deemed too much of a risk to mission success. Thursday, April 11th’s recycled launch window is identical to Wednesday’s, stretching from 6:35pm-8:31pm ET (22:35-00:31 UTC).

According to SpaceX, both the Falcon Heavy Block 5 rocket and its Arabsat 6A satellite payload are in good health and would have been ready to launch on April 10th if the weather had been slightly more cooperative. While seemingly innocuous, something as basic as wind currents can risk the partial or total failure of rockets even as large as Falcon Heavy, The intricacy and stress-optimized nature of Falcon Heavy’s three interlinked boosters make the rocket particularly susceptible to off-nominal aerodynamic stresses, constantly performing a sort of balancing act to keep those boosters flying in a sort of formation at extreme speeds.

While rockets are also susceptible to extreme ground-level wind conditions, upper-level wind violations are far more common, particularly for SpaceX’s Falcon family. Falcon 9 and Heavy are uniquely at the mercy of these conditions due to a fineness ratio (height vs. width) unprecedented at their level of performance. In fact, Falcon boosters are so long, skinny, and mass-optimized that SpaceX actually pressurizes them with nitrogen during extended/unsupported periods in a horizontal orientation. In simpler terms, held near its extremities, Falcon first stages can actually damage themselves under their own weight by bending somewhere in the middle.

Past a certain point, this bending is highly undesirable. The walls of Falcon 9’s lithium-aluminum alloy propellant tanks – also doubling as part of the rocket’s load-bearing structure – are approximately 0.2 in (5mm) thick, around 40% thinner than an iPhone X. Weighing approximately 25,000 kg (55,000 lb) empty yet 550,000 kg (1,210,000 lb) when full of fuel, Falcon 9 is thus a bit like a rolled sheet of printer paper balancing under a textbook while accelerating at several Gs.

The problem is that Earth’s atmosphere is heavily stratified: there are many different horizontal layers of air that can end up moving in very different directions at very different speeds. Imagine for a second that you’re sprinting along a sidewalk but each sidewalk section is actually a treadmill moving slightly left or right. Running along at full speed, you abruptly hit several sections that are rapidly moving, say, right. Bad times are had. For Falcon Heavy (or 9), running into high upper-level winds is much less exaggerated but still ends up having the same effect: the rocket, like the runner, loses control authority and ends up a fair bit more sideways than intended. When rockets find themselves tilting more than a few degrees off of their vector, they start to bend and flex a lot. When rockets more than minutely bend and flex, they have a tendency to crumple and warp to the point that they will literally break into pieces a bit like a partially cooked spaghetti noodle.

A spectacular panorama of Falcon Heavy Flight 2 prior to lifting horizontal for an April 10th launch attempt. (Pauline Acalin)
Falcon Heavy was lifted vertical by the transporter/erector while photographers were setting up remote cameras. (Pauline Acalin)

Those same forces act on Falcon Heavy quite a bit differently than they do on a single Falcon 9, but the principle remains the same: sideways booster = bad news. The wind wins this round but SpaceX will be ready for another attempt today. Likely a strategic choice, Wednesday’s launch attempt was called off just shy of 20 minutes before propellant loading began, dramatically simplifying the process of turning Falcon Heavy around for another launch attempt.

Tune in later today for another exciting day of Falcon Heavy photos and prelaunch operations as photographers – including Teslarati’s Pauline Acalin and Tom Cross – return to Pad 39A to replace camera batteries and generally ogle an elegant rocket.

Check out Teslarati’s Marketplace! We offer Tesla accessories, including for the Tesla Cybertruck and Tesla Model 3.

Advertisement

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.

Advertisement
Comments

News

SpaceX set to launch Axiom’s mission for diabetes research on the ISS

Axiom’s Ax-4 will test CGMs & insulin stability in microgravity—potentially reshaping diabetes care for Earth & future astronauts.

Published

on

(Credit: SpaceX)

Axiom Space’s Ax-4 mission is set to launch on a SpaceX Falcon 9 rocket. Ax-4 will advance diabetes research in microgravity, marking a milestone for astronaut health.

Axiom Space’s fourth crewed mission is scheduled to launch with SpaceX on May 29 from NASA’s Kennedy Space Center in Florida. The Ax-4 mission will carry a diverse crew and a record-breaking scientific payload to the International Space Station (ISS).

The Ax-4 crew is led by Axiom’s Peggy Whitson and includes Shubhanshu Shukla from India, Sławosz Uznański from the European Space Agency, and Tibor Kapu from Hungary. The mission represents firsts for India, Hungary, and Poland, with Uznański being Poland’s first astronaut in over 40 years.

Ax-4 will conduct nearly 60 science investigations from 31 countries during its two-week ISS stay. A key focus is the “Suite Ride” initiative, a collaboration with Burjeel Holdings to study diabetes management in microgravity.

“The effort marks a significant milestone in the long-term goal of supporting future astronauts with insulin-dependent diabetes (IDDM), a condition historically deemed disqualifying for spaceflight,” Axiom noted. The mission will test Continuous Glucose Monitors (CGMs) and insulin stability to assess their performance in space.

Advertisement

Axiom explained that testing the behavior of CGMs and insulin delivery technologies in microgravity and observing circadian rhythm disruption could help diabetes experts understand how CGMs and insulin pens can improve diabetes monitoring and care in remote or underserved areas on Earth. The research could benefit diabetes management in isolated regions like oil rigs or rural areas.

The mission’s findings on insulin exposure and CGM performance could pave the way for astronauts with diabetes to safely participate in spaceflight. As Axiom and SpaceX push boundaries, Ax-4’s diabetes research underscores the potential for space-based innovations to transform healthcare on Earth and beyond.

Continue Reading

Elon Musk

EU considers SES to augment Starlink services

The EU considers funding SES to support Starlink. With MEO satellites already serving NATO, SES could be key in Europe’s space autonomy push.

Published

on

EU-ses-starlink-augment
(Credit: SES)

European satellite company SES is negotiating with the European Union (EU) and other governments to complement SpaceX’s Starlink, as Europe seeks home-grown space-based communication solutions. The talks aim to bolster regional resilience amid growing concerns over reliance on foreign providers.

In March, the European Commission contacted SES and France’s Eutelsat to assess their potential role if American-based Starlink access for Ukraine was disrupted. The European Commission proposed funding EU-based satellite operators to support Kyiv. Ukraine is considering alternatives to Starlink over concerns about Elon Musk’s reliability.

Arthur De Liedekerke of Rasmussen Global warned, “Elon Musk is, in fact, the guardian of Ukraine’s connectivity on the battlefield. And that’s a strategic vulnerability.” However, SpaceX’s Starlink constellation is leagues ahead of any competition in the EU.

“Now the discussions are much more strategic in nature. They’re much more mid-term, long-term. And what we’re seeing is all of the European governments are serious about increasing their defense spending. There are alternatives, not to completely replace Starlink, that’s not possible, but to augment and complement Starlink,” SES CEO Adel Al-Saleh told Reuters.

Advertisement

SES operates about 70 satellites, including over 20 medium Earth orbit (MEO) units at 8,000 km. The company provides high-speed internet for government, military, and underserved areas. It plans to expand its MEO fleet to 100, enhancing secure communications for NATO and the Pentagon.

“The most significant demand (for us) is European nations investing in space, much more than what they did before,” Al-Saleh said.

Competition from Starlink, Amazon’s Kuiper, and China’s SpaceSail, with their extensive low-Earth orbit constellations, underscores Europe’s push for independence.

“It is not right to say they just want to avoid Starlink or the Chinese. They want to avoid being dependent on one or two providers. They want to have flexibility,” Al-Saleh noted.

SES’s discussions reflect Europe’s strategic shift toward diversified satellite networks, balancing reliance on Starlink with regional capabilities. As governments ramp up defense spending, SES aims to play a pivotal role in complementing global providers, ensuring robust connectivity for military and civilian needs across the continent.

Advertisement
Continue Reading

News

Amazon launches Kuiper satellites; Can it rival Starlink?

With 27 satellites in orbit, Amazon kicks off its $10B plan to deliver global broadband. Can Bezos’ Kuiper take on Musk’s Starlink?

Published

on

amazon-kuiper-satellite-starlink-rival
(Credit: Amazon)

Amazon’s Project Kuiper launched its first 27 satellites on Monday, marking the start of a $10 billion effort that could compete with SpaceX’s Starlink with a global broadband internet network.

Amazon’s Kuiper satellites launched aboard a United Launch Alliance Atlas V rocket from Cape Canaveral, Florida. Project Kuiper’s recent launch is the initial step toward deploying Amazon’s 3,236 satellites for low-Earth orbit connectivity. Amazon’s satellite launch was initially set for April 9 but was delayed due to bad weather.  

Now that the Kuiper satellites have been launched, Amazon is expected to publicly confirm contact with the satellites from its mission operations center in Redmond, Washington. The company aims to start offering Kuiper services to customers later this year. Project Kuiper was unveiled in 2019 and targets consumers, businesses, and governments who need reliable internet service, similar to Starlink.

Amazon has a deadline from the U.S. Federal Communications Commission to deploy 1,618 satellites by mid-2026. Analysts suggest the company may require an extension to its Kuiper satellite deployment deadline due to the project’s year-long delay from its planned 2024 start.

United Launch Alliance could conduct up to five more Kuiper missions this year, according to ULA CEO Tory Bruno. Amazon noted in a 2020 FCC filing that Kuiper services could begin with 578 satellites, initially covering northern and southern regions.

Advertisement

Kuiper’s launch pits Amazon against SpaceX’s Starlink and telecom giants like AT&T and T-Mobile, with a focus on underserved rural areas.

“There’s an insatiable demand for the internet,” Amazon Executive Chairman Jeff Bezos told Reuters in January. “There’s room for lots of winners there. I predict Starlink will continue to be successful, and I predict Kuiper will be successful as well.”

Global interest in satellite alternatives is rising. Ukraine is exploring Starlink alternatives with the European Union (EU), driven by concerns over Elon Musk. Germany’s military, Bundeswehr, also plans its own constellation to ensure independent communications. However, like Amazon’s Kuiper Project, EU options lag behind Starlink.

Amazon’s consumer expertise and cloud computing infrastructure give Kuiper a competitive edge despite Starlink’s market lead. As Kuiper ramps up launches, its success could reshape broadband access while challenging SpaceX’s dominance in the satellite internet race.

Advertisement
Continue Reading

Trending