SpaceX
SpaceX recycles Falcon Heavy’s commercial launch debut to Thurs – here’s why
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.
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.
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Elon Musk
California city weighs banning Elon Musk companies like Tesla and SpaceX
A resolution draft titled, “Resolution Ending Engagement With Elon Musk-Controlled Companies and To Encourage CalPERS To Divest Stock In These Companies,” alleges that Musk “has engaged in business practices that are alleged to include violations of labor laws, environmental regulations, workplace safety standards, and regulatory noncompliance.”
A California City Council is planning to weigh whether it would adopt a resolution that would place a ban on its engagement with Elon Musk companies, like Tesla and SpaceX.
The City of Davis, California, will have its City Council weigh a new proposal that would adopt a resolution “to divest from companies owned and/or controlled by Elon Musk.”
This would include a divestment proposal to encourage CalPERS, the California Public Employees Retirement System, to divest from stock in any Musk company.
A resolution draft titled, “Resolution Ending Engagement With Elon Musk-Controlled Companies and To Encourage CalPERS To Divest Stock In These Companies,” alleges that Musk “has engaged in business practices that are alleged to include violations of labor laws, environmental regulations, workplace safety standards, and regulatory noncompliance.”
It claims that Musk “has used his influence and corporate platforms to promote political ideologies and activities that threaten democratic norms and institutions, including campaign finance activities that raise ethical and legal concerns.”
If adopted, Davis would bar the city from entering into any new contracts or purchasing agreements with any company owned or controlled by Elon Musk. It also says it will not consider utilizing Tesla Robotaxis.
Hotel owner tears down Tesla chargers in frustration over Musk’s politics
A staff report on the proposal claims there is “no immediate budgetary impact.” However, a move like this would only impact its residents, especially with Tesla, as the Supercharger Network is open to all electric vehicle manufacturers. It is also extremely reliable and widespread.
Regarding the divestment request to CalPERS, it would not be surprising to see the firm make the move. Although it voted against Musk’s compensation package last year, the firm has no issue continuing to make money off of Tesla’s performance on Wall Street.
The decision to avoid Musk companies will be considered this evening at the City Council meeting.
The report comes from Davis Vanguard.
It is no secret that Musk’s political involvement, especially during the most recent Presidential Election, ruffled some feathers. Other cities considered similar options, like the City of Baltimore, which “decided to go in another direction” after awarding Tesla a $5 million contract for a fleet of EVs for city employees.
Elon Musk
Starlink restrictions are hitting Russian battlefield comms: report
The restrictions have reportedly disrupted Moscow’s drone coordination and frontline communications.
SpaceX’s decision to disable unauthorized Starlink terminals in Ukraine is now being felt on the battlefield, with Ukrainian commanders reporting that Russian troops have struggled to maintain assault operations without access to the satellite network.
The restrictions have reportedly disrupted Moscow’s drone coordination and frontline communications.
Lt. Denis Yaroslavsky, who commands a special reconnaissance unit, stated that Russian assault activity noticeably declined for several days after the shutdown. “For three to four days after the shutdown, they really reduced the assault operations,” Yaroslavsky said.
Russian units had allegedly obtained Starlink terminals through black market channels and mounted them on drones and weapons systems, despite service terms prohibiting offensive military use. Once those terminals were blocked, commanders on the Ukrainian side reported improved battlefield ratios, as noted in a New York Post report.
A Ukrainian unit commander stated that casualty imbalances widened after the cutoff. “On any given day, depending on your scale of analysis, my sector was already achieving 20:1 (casuality rate) before the shutdown, and we are an elite unit. Regular units have no problem going 5:1 or 8:1. With Starlink down, 13:1 (casualty rate) for a regular unit is easy,” the unit commander said.
The restrictions come as Russia faces heavy challenges across multiple fronts. A late January report from the Center for Strategic and International Studies estimated that more than 1.2 million Russian troops have been killed, wounded, or gone missing since February 2022.
The Washington-based Institute for the Study of War also noted that activity from Russia’s Rubikon drone unit declined after Feb. 1, suggesting communications constraints from Starlink’s restrictions may be limiting operations. “I’m sure the Russians have (alternative options), but it takes time to maximize their implementation and this (would take) at least four to six months,” Yaroslavsky noted.
Elon Musk
SpaceX and xAI tapped by Pentagon for autonomous drone contest
The six-month competition was launched in January and is said to carry a $100 million award.
SpaceX and its AI subsidiary xAI are reportedly competing in a new Pentagon prize challenge focused on autonomous drone swarming technology, as per a report from Bloomberg News.
The six-month competition was launched in January and is said to carry a $100 million award.
Bloomberg reported that SpaceX and xAI are among a select group invited to participate in the Defense Department’s effort to develop advanced drone swarming capabilities. The goal is reportedly to create systems that can translate voice commands into digital instructions and manage fleets of autonomous drones.
Neither SpaceX, xAI, nor the Pentagon’s Defense Innovation Unit has commented on the report, and Reuters said it could not independently verify the details.
The development follows SpaceX’s recent acquisition of xAI, which pushed the valuation of the combined companies to an impressive $1.25 trillion. The reported competition comes as SpaceX prepares for a potential initial public offering later this year.
The Pentagon has been moving to speed up drone deployment and expand domestic manufacturing capacity, while also seeking tools to counter unauthorized drone activity around airports and major public events. Large-scale gatherings scheduled this year, including the FIFA World Cup and America250 celebrations, have heightened focus on aerial security.
The reported challenge aligns with broader Defense Department investments in artificial intelligence. Last year, OpenAI, Google, Anthropic, and xAI secured Pentagon contracts worth up to $200 million each to advance AI capabilities across defense applications.
Elon Musk previously joined AI and robotics researchers in signing a 2015 open letter calling for a ban on offensive autonomous weapons. In recent years, however, Musk has spoken on X about the strengths of drone technologies in combat situations.
California city weighs banning Elon Musk companies like Tesla and SpaceX
Tesla launches new Model 3 financing deal with awesome savings
