Connect with us

News

SpaceX set for second weekend launch, new titanium grid fins to be tested

Published

on

After a highly successful Friday launch and recovery of a reused Falcon 9, a second vehicle is preparing to launch on the opposite coast of the United States. Scheduled to lift off at precisely 1:25 p.m. PST, this mission will see a brand new Falcon 9 lift Iridium’s second set of ten NEXT satellites, after which the first stage will attempt to land in the Pacific Ocean aboard Just Read The Instructions, SpaceX’s West Coast drone ship.

If the schedule holds, the 46 hours separation between launches will make SpaceX one of very few entities to have launched the same vehicle in such close succession. While Russia/USSR and the Republic of China have tended to routinely launch missions with as few as a handful of hours in between, it is extremely rare in the United States, and such an accomplishment will likely make SpaceX the second private company to ever conduct two launches in under 48 hours.

This turnaround, which COO Gwynne Shotwell clarified could safely be as few as 24 hours, bodes extremely well for SpaceX’s and Musk’s goal of being able to launch every 24 hours. With the COO of the company already under the impression that 24 hours would be safely and reliably achievable, all that lies in the way of 24 hour cadence is pad availability. With current cadence suggesting that at least two weeks of down time is needed after a launch to verify pad health, the late-fall reactivation of Launch Complex 40 and eventual activation of SpaceX’s planned Boca Chica, Texas launch facility will give SpaceX three general-purpose pads and one limited use-case pad (Vandenberg Air Force Base) to launch from by late 2018 or early 2019. Three general purpose pads would allow SpaceX to launch every four or five days, assuming no improvements in pad resilience and autonomy, and this weekend’s back to back launches will demonstrate that SpaceX is easily capable of fully taking advantage of those three (or four) pads once they are all active.

Falcon 9’s fancy new titanium grid fins. (SpaceX/Instagram)

As for the launch today, it will debut some intriguing new hardware intended to improve the ease of reusability for the first stage. Musk offered a tweet storm last night and SpaceX one or two photos to explain the utility of the vehicles distinctive and unusual black grid fins. Ready to launch in just over an hour from Vandenberg Air Force Base, Falcon 9 and its new grid fins will place the next ten iridium NEXT satellites in Low Earth Orbit. The first stage will then proceed to the autonomous spaceport drone ship Just Read The Instructions, while testing its rather fancy titanium grid fins. Considerably larger than their aluminum predecessors, this new iteration of grid fins will is intended to both provide more control authority and glide capability in anticipation of the Falcon Heavy, while also offering improve resilience to the extreme heat and forces grid fins must necessarily cope with during reentry. You may have noted grid fins appearing to glow red and orange with the heat of reentry in past live coverage, and recovered stages demonstrate just how harsh high temperatures can be to aluminum. Titanium is famously resistant to heat and will thus optimally be able to be reused with no refurbishment or replacement whatsoever.

With the launch just over an hour out and no current known issues, you can watch SpaceX’s regularly amazing live coverage of the launch at spacex.com/webcast.

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

Verizon, AT&T and T-Mobile are trying to shut Starlink out before FCC vote

AT&T, Verizon and T-Mobile want 290 MHz cut from an FCC satellite plan before Thursday.

Published

on

By

Starlink D2D direct to device vs Verizon, AT&T (Concept render by Grok)

AT&T, Verizon and T-Mobile are asking the Federal Communications Commission to pull nearly 300 MHz of spectrum out of a proposal that would let satellite companies like SpaceX offer cell service directly to ordinary phones. The request lands one day before the agency votes on it.

The FCC will vote Thursday, October 29, on a notice of proposed rulemaking that would make an additional 482 MHz available for direct to device service, expanding the number of eligible bands from five to 13, according to the FCC fact sheet. It would also scrap the rule requiring a satellite operator to lease spectrum from carriers, replacing it with a certification that the operator has coexistence agreements in place or holds the terrestrial license itself.

That second path matters for SpaceX. As Teslarati reported earlier this month, SpaceX agreed to buy Grain Management’s nationwide 800 MHz portfolio to turn Starlink Mobile into a full US carrier, adding to the spectrum it already bought from EchoStar.

The carriers want two bands removed, 2.5 GHz and 3.45 GHz, which make up 290 MHz of the 482 MHz on the table. Through industry group CTIA, they argued that about 300 million users depend on those bands and that satellite operations in them are not technically feasible. T-Mobile, which calls 2.5 GHz the foundation of its Ultra Capacity 5G network, said in its own filing that satellite interference could wipe out up to 96% of a cell site’s uplink coverage area and cut uplink speeds by 88% to 99%.

Executives from all three carriers met with FCC staff on October 20, and T-Mobile CEO Srini Gopalan met separately with FCC Chairman Brendan Carr. T-Mobile’s role stands out because it is still SpaceX’s US launch partner for Starlink Mobile. The three carriers have also teamed up on their own satellite joint venture to pool spectrum, a move widely seen as a response to Starlink.

Advertisement
-

SpaceX is asking for the opposite. In an October 23 filing after meetings with FCC staff and commissioners’ offices, the company asked regulators to add the 902 to 928 MHz band to the proposal. “Doing so now saves time later,” SpaceX wrote. The company also asked the FCC to modernize interference rules and align satellite deployment requirements with those for terrestrial cell networks, saying the goal is to let satellite and ground networks work together so Americans stay connected wherever they are.

The carriers have not been shy about how they view SpaceX as a competitor. On Verizon’s third quarter earnings call Monday, its chief executive said Starlink Mobile “just can’t compete with a terrestrial network” and estimated SpaceX would need four to six years and $300 billion to $500 billion to build a full US carrier network.

Thursday’s vote will not settle which bands survive. Adopting the notice opens a public comment period, with final rules to come later in the proceeding. The FCC already considered and rejected 2.5 GHz for satellite coverage once, in 2024. SpaceX also is not the only satellite player watching: the FCC approved Amazon’s $11.6 billion acquisition of Globalstar on October 27, giving its planned direct to device fleet its own mobile satellite spectrum.

Continue Reading

News

Tesla Semi catches fire in California: what we know

Published

on

Credit: KTVU

A Tesla Semi caught fire in Hayward, California, which caused both directions of traffic to shut down for hours before being completely reopened early on Wednesday, the California Highway Patrol said.

The fire occurred just after 5:30 local time in Hayward on Tuesday, as the Semi caught fire in the southbound lanes of I-880 before CHP officials made the decision to shut down both lanes of traffic due to potential risks from hazardous chemical smoke.

There were no injuries reported.

The cause of the fire is currently unknown, as neither Tesla nor the CHP have not determined a cause.

However, some images taken before the Semi was completely destroyed by the fire seem to indicate this might have been an older unit, as it appears to be one of the designs that Tesla shipped as part of its pilot program, before revising it and starting mass production just a month ago.

At the time of publication, CHP had not returned our request for a comment for additional details, including the Semi involved and any potential collaboration on an investigation between the CHP and Tesla. We will update this story when we hear back from them.

The southbound lanes were reopened at 3:30 a.m. on Wednesday, with the northbound lanes opening last night a few hours after the fire began. The CHP did state that the lithium batteries were “incredibly difficult to extinguish,” according to NBC Bay Area.

The truck’s driver said that the Semi caught fire, but he did not have an explanation.

An estimated 5,000 to 7,000 semi-truck and large commercial vehicle fires occur on U.S. roadways every year.

Continue Reading

News

Tesla’s ‘Emergency Drive Away’ function gets its first use in the real world

Published

on

Credit: Tesla

Tesla’s launch of the “Emergency Drive Away” function a few months back offered owners a safe option to evacuate an area if they were in reasonable danger. The function finally got its first use in the real world, but it appears it was by mistake.

A video shared by u/Joshalander in the r/TeslaLounge subreddit recorded the instance from his vehicle and said the incident took place in Austin this past weekend during the city’s F1 Race.

“Was charging around 6 AM this past Sunday in Austin before heading to the F1 race and heard a pop. Looked over and saw the new emergency drive-away feature in action. Genuinely felt bad for the dude when he got out and realized what happened, since he looked exhausted and only seemed to half-read the prompts.”

Emergency Drive Away unlatches the Supercharger connector from the vehicle, but still causes damage to both the car and the Supercharger. Tesla has said that it will cost up to $25,000 in repairs to have everything fixed back to normal.

Additionally, the company said that if it were not used in an emergency situation, the driver of the vehicle who activated the Emergency Drive Away feature would be responsible for all repair costs.

Tesla constitutes the following situations as reasonable justifications for activating the feature:

  • You face an immediate threat to your life or personal safety.
  • You must leave the area immediately.
  • Exiting the vehicle is unsafe.
  • Unplugging the charge connector would unreasonably delay your departure or expose you to a risk to your personal safety.

After using the feature, Tesla requires the driver to schedule Service so the car can be inspected.

Continue Reading