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Premium stainless steel restraint system, secures hands and feet, fully customizable. Retweet if you're curious to try it sissy boi 🔐🔑🔏🙇⛓️

177,305 просмотров • 1 год назад •via X (Twitter)

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Elon Musk says steel killed carbon fiber on Starship at one-fiftieth the cost. Carbon fiber was supposed to be the future of rocketry. Lighter than aluminum. Stronger than steel. Trusted by every Formula 1 team. SpaceX picked it for Starship. "Particularly if you go for a high-strength specialized carbon fiber that can handle cryogenic oxygen, it's roughly 50 times the cost of steel." Then progress stalled. The autoclaves needed to cure the resin had to outsize every autoclave on Earth, and the team couldn't even produce a clean barrel section without wrinkles. Musk, watching the Mars timeline slip: "At this rate, we're never going to get to Mars. So we've got to think of something else." So he asked the question nobody at SpaceX had asked: "What about steel?" It became known as the **cryogenic stainless flip**. Musk, who had already shipped Falcon 9 in aluminum-lithium, broke with the textbook. "When you look at the material properties of stainless steel, full-hard, strain hardened stainless steel, at cryogenic temperature the strength to weight is actually similar to carbon fiber." Starship ran on cryogenic methane and oxygen. The airframe lived at temperatures that flipped steel ahead of carbon fiber. "You could smoke a cigar while welding stainless steel." After Musk made the call, steel weighed less than the carbon fiber version. Fifty times cheaper in raw material. Twice the heat tolerance. Half the heat shield mass. Musk, looking back: "In retrospect, we should have started with steel in the beginning. It was dumb not to do steel." What "obvious" material in your work is silently costing you the project? If you're new here, GeniusThinking is a gallery for the greatest minds in economics, psychology, and history. Follow along for more similar content. P.S. I've made a free playbook on how to use and create your own mental models. This includes the same thinking strategies Feynman, Munger, and Musk built their careers on. Ttrusted by 5,000+ founders and investors. Grab your copy: — Elon Musk ( Elon Musk ), CEO of Tesla and SpaceX, on Dwarkesh Patel's ( Dwarkesh Patel ) podcast

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829,800 просмотров • 3 месяцев назад

🎙️ Can They Manipulate Bitcoin? Jeff Booth ⚡️ on You’re The Voice | Podcast by Efrat Fenigson "Let's say #bitcoin fell by 95%. You're gonna sell or buy? Buy. Of course. So now let's say the existing system, imagine, just let's play game theory, imagine the system that the BlackRock and everything consolidate enough coins, and then they start to try to make self custody illegal, and these things are coordinated, and then they start shorting bitcoin to drive price down. There are too many people that know, and they will just take all the bitcoin into self custody. And so it keeps it decentralized and secure. And what would happen in that case is as they tried to manipulate Bitcoin, I'm not saying they will, but if they tried to do that and manipulate price down, then you would have a major financial party get liquidated, completely liquidated. It would look like FTX, but JP Morgan or BlackRock. And that would take down the entire system if that happened. So will these games happen? Of course they're gonna happen. People are going to try to cheat because human beings have always tried to cheat. So that's totally logical that they will. But human beings have tried to cheat on a system that allowed cheating. Try to cheat a system that won't allow cheating and eventually you're gonna get liquidated and bring it on. It doesn't touch anybody that self custodies. It doesn't touch you at all. Like were you hurt by FTX? Nothing." Watch full episode, like, share & support >>

Efrat Fenigson

135,387 просмотров • 2 лет назад