Eric Betzig

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Eric Betzig

Eric Betzig

@Eric_Betzig

An engineering physicist sometimes masquerading as a biologist or, on one occasion, a chemist. Aspiring astronaut. Nuclear is the way.

Katılım Aralık 2023
23 Takip Edilen3.3K Takipçiler
Eric Betzig
Eric Betzig@Eric_Betzig·
Single crystal turbine blades are near the top of my list for one of the most important and most overlooked technologies of the past 100 years -- both for electricity generation (65% Carnot efficiency in combined cycle!) and jet engines. Like EUV lithography, near alien-level tech, and together with horizontal drilling/fracking, they have completely transformed the energy economy in the US. If Musk is interested in them enough to start making his own (no mean feat, as noted in this post), maybe he's not quite as all-in on solar powered data centers, either terrestrial or in orbit, as he claims to be.
Gaurab Chakrabarti@Gaurab

Four foundries on Earth cast the single-crystal blades and vanes that let a gas turbine convert 1,500-degree gas into electricity. PCC and Howmet hold about 80% of the single-crystal market. Doncasters and CPP take most of the rest. Every heavy-frame gas turbine ordered in the past 18 months is sold out through 2030. Elon Musk on @dwarkesh_sp traced his own xAI Colossus power problem one layer down past the turbines and landed on the blades. He said SpaceX and Tesla will likely have to cast their own. We manufacture chemicals. Casting a single-crystal blade is not a metallurgy problem. It is a chemistry problem. The four foundries that cast them spent thirty years driving sulfur down to parts per billion and oxygen down to parts per million. Vacuum, gradient solidification, and mold chemistry are why nobody else can cast them. The bottleneck is chemistry.

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Eric Betzig retweetledi
Physics In History
Physics In History@PhysInHistory·
A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving. - A. Einstein (1879-1955)
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Eric Betzig
Eric Betzig@Eric_Betzig·
Really grateful that Western Europe is leading the way with all forms of government mandated social engineering, to show by example to those of us in the US how things should not be done.
RAW EGG NATIONALIST@Babygravy9

Amsterdam has now banned all public advertisements for meat products, in a bid to change "social norms" and reduce citydwellers' meat consumption by half by 2050. Green politicians like Anneke Veenhoff and Anke Bakker spearheaded the ban.

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Prof. Carl Sagan
Prof. Carl Sagan@ProfCarlSagan·
The most powerful drive in the ascent of man is his pleasure in his own skill. He loves to do what he does well and, having done it, he loves to do it better. - Jacob Bronowski
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Eric Betzig
Eric Betzig@Eric_Betzig·
Without running the numbers, I assumed that propellant production alone would make Musk's claim of 1000+ Starship flights per year, let's say, "aspirational". Based on @maphumanintent's dictum that "logistics is a map of human intent", it looks SpaceX may have found a way. If true, a great win for Louisiana, which currently ranks 39th in GDP per capita.
Ozan Bellik@BellikOzan

Once again I'm feeling the double edged sword of finding out that @SpaceX is not just decades ahead of us in execution but months or years ahead of us in planning (if this bit of speculative rumor chasing is true...). 18 days ago I told my group we should try to launch from Louisiana. (Yeah, I think SpaceX is going to use this land for a launch site, if they're indeed closing.) You don't need a logistics hub in Louisiana to transport Starships between Texas and Florida. Especially not one that's 136,000 acres. There are only three things I can make sense of SpaceX using that much land for: launch site, natural gas production, and solar power for air separators and condensers. Preferably all three. And Louisiana is just about perfect for SSO launches headed south-southwest, flying over the gulf and a relatively short strip of a relatively sparsely inhabited region of Mexico before heading into the Pacific (and natural gas is a fraction of what it is in California, with a much friendlier regulatory environment). And Louisiana allows true private coastal ownership, unlike Texas, which requires public access to the waterfront. Anyway, I'm happy for SpaceX (for them, for our country, and for humanity). I hope they get to make the most of it. And I hope we get our day there, as well.

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Eric Betzig retweetledi
Physics In History
Physics In History@PhysInHistory·
Don't force your children into your ways, for they were created for a time different from your own. -- Plato (c. 427 BC – c. 347 BC)
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Eric Betzig
Eric Betzig@Eric_Betzig·
Spectacular soliloquy about the eternal interplay of energy and entropy, and its implications for the complexity and ultimate fragility of societies @w1nt3rmu4e/video/7609459046235639053" target="_blank" rel="nofollow noopener">tiktok.com/@w1nt3rmu4e/vi…
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