After a day worth of hard work, the workers at #SpaceX have finally installed the first raptor on #StarHopper . Congratulations to Elon musk and all the hard workers at SpaceX. It’s almost time for StarHopper to purr like a kitten🐱🔥🚀. pic.twitter.com/YIhbNhqJEk
You can deep throttle on single shaft system by choking flow of fuel or oxygen between pump & combustion chamber. Problem is more with the tiny rocket engine that powers the pump, called a gas generator. That has to throttle *way* deeper than the main chamber.
Raptor is *very* complex, even for a staged combustion engine. We’re simplifying as much as possible with each iteration. Throttling down to ~50% is hard, but manageable. Going to 25% would be extremely tough, but hopefully not needed.
Editor’s Note: Rogozin’s Twitter account is limited to approved followers, not the general public. The Kremlin has appointed a minder over at Roscosmos to tamp down on the general director’s public comments.
My guess is that after the dust up over Roscosmos’ tweet after Crew Dragon docked, someone (Putin?) talked to (yelled at?) Rogozin and made sure he (his political minder?) made sure something nice was tweeted for the landing.
Elon Musk’s top secret federal security clearance is under review by the Pentagon, after his pot-smoking appearance on Joe Rogan’s podcast last September, according to a U.S. official pic.twitter.com/55zNpffqcC
Editor’s Note: The investigation might not be only about the pot smoking. Investigators could be examining unconfirmed published reports that say Musk has used cocaine, LSD and ecstasy. I stress these stories are unconfirmed, but they have been circulating for many months now. And Musk’s behavior over the past year has been erratic and even bizarre.
Elon Musk’s SpaceX has applied for permission from the Federal Communications Commission (FCC) to operate up to one million Earth stations to serve its Starlink constellation of 4,425 Ku- and Ka-band communications satellites it plans to begin launching later this year.
“These user terminals employ advanced phased-array beam-forming and digital processing technologies to make highly efficient use of Ku-band spectrum resources by supporting highly directive, steered antenna beams that track the system’s low-Earth orbit satellites,” SpaceX said in its application.
The Earth stations would be deployed in the contiguous United States, Alaska, Hawaii, Puerto Rico, and the U.S. Virgin Islands, “including areas underserved or currently unserved by existing networks,” the company wrote.
“As the Commission has recognized, many communities across the United States and the world still lack access to reliable broadband connectivity, preventing them from fully participating in economic, social, and civic activities,” the application stated.
“To help close this digital divide, SpaceX is designing, constructing, and deploying an innovative, cost-effective and spectrum-efficient satellite system capable of delivering robust broadband service to customers around the world. SpaceX has already secured U.S. authority for the space station components of its NGSO [non-geosynchronous orbit] system,” the document said.
SpaceX has decided it would be easier to build its giant Starship spacecraft in Texas rather than at the Port of Los Angeles in California as originally planned, Alan Boyle reports.
SpaceX says it’ll build and test the prototypes for its next-generation Starship space cruiser and Super Heavy booster in South Texas, despite a deal it struck to build a rocket factory at the Port of Los Angeles.
At least by some accounts, the turnabout is a setback to Los Angeles’ efforts to build a high-tech “Silicon Harbor” at the port, with SpaceX’s planned 18-acre site on Terminal Island as the centerpiece. The Los Angeles City Council approved a 20-year lease agreement with billionaire CEO Elon Musk’s company in May.
“We are building the Starship prototypes locally at our launch site in Texas, as their size makes them very difficult to transport,” Musk explained today in a tweet.
However, Musk also said development work for Starship and its methane-fueled Raptor engines would continue to be done at SpaceX’s Hawthorne headquarters. He said any confusion about SpaceX’s plans was due to “our miscommunication.”
SpaceX is building a launch site at Boca Chica Beach near Brownsville. It is assembling a subscale Starship hopper to conduct atmospheric tests later this year.
The Brownsville Heraldreports on a request by federal law enforcement for access to SpaceX’s Boca Chica launch complex, which lies just north of the U.S.-Mexico border.
SpaceX confirmed Wednesday that officials with the Department of Homeland Security and U.S. Customs and Border Protection have requested access to the property where rockets could one day launch to Mars.
“The Department of Homeland Security and U.S. Customs and Border Protection recently requested SpaceX permit access to our South Texas Launch site to conduct a site survey,” SpaceX Spokesman James Gleeson said in a statement. “At this time, SpaceX is evaluating the request and is in communication with DHS to further understand their plans.”
The development comes as SpaceX continues to work on its launch pad and while the company owned by entrepreneur Elon Musk, who recently visited the South Texas Launch site, is building a prototype of the Starship spacecraft that may one day take people to Mars.
The only announcement the federal government has made about building more border wall infrastructure in Cameron County is that it will fill in 11 gaps in the in existing wall.
The U.S. Air Force Research Laboratory has awarded Elon Musk’s SpaceX a contract worth $28.7 million for research work on the company’s Starlink satellite constellation.
“This agreement allows for experimentation in the areas of establishing connectivity, operational experimentation, and special purpose experimentation. Experimentation will include connectivity demonstrations to Air Force ground sites and aircraft for experimental purposes,” the contract award states.
“For the proposed Phase 2, the awardee proposes to perform experiments in two other key areas: early versions of a commercial space-to-space data relay service and mobile connectivity directly from space to aircraft,” the award added.
Starlink is designed to provide global communications services using an initial constellation of more than 4,000 satellites. When fully built out, the system will include nearly 12,000 spacecraft.
The Wall Street Journalreports that SpaceX is set to raise $500 million at a $30.5 billion valuation to kickstart its Starlink satellite Internet program.
The Hawthorne, Calif., company, known as SpaceX, is raising the capital from existing shareholders and new investor Baillie Gifford & Co., one of the people said. The Scottish money-management firm is one of the largest investors in another Musk-led company, Tesla Inc., with about a 7.6% stake in the electric-car maker, according to S&P Global Market Intelligence.
SpaceX and the investors have agreed on the financing terms, but the money hasn’t been sent to the company yet, this person said. SpaceX could announce the deal by year-end.
Including the current round, SpaceX has raised about $2.5 billion of equity funding, according to Dow Jones VentureSource. Last month it raised $250 million via its first high-yield loan sale….
SpaceX ultimately could require more than $10 billion in capital to reach its projected 11,000 satellite constellation, according to some industry estimates, while developing its heavy-lift rocket and capsule is anticipated to cost many more billions of dollars.
The Washington Postreports NASA safety reviews of its two commercial crew providers was triggered by SpaceX CEO Elon Musk’s use of drugs and alcohol.
The review, to begin next year, would look at both Boeing and SpaceX, the companies under contract to fly NASA’s astronauts, and examine “everything and anything that could impact safety” as the companies prepare to fly humans for the first time, William Gerstenmaier, NASA’s associate administrator for human exploration, said in an interview with The Washington Post. (more…)