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Blue Origin's New Glenn blows up during static fire test

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Re: Blue Origin's New Glenn blows up during static fire test

#151

Have we confirmed nobody was hurt? EDIT: Everyone is fine [1]. Go ahead and make jokes. [1] https://x.com/blueorigin/status/2060172114796204539?s=20

Not sure why you were downvoted. That’s the first thing I thought of, too. They got all the people out of the area, standard procedure but still, this was a huge boom.

Re: Blue Origin's New Glenn blows up during static fire test

#152

Does anyone else find it surprising that rockets are a century old[1] and yet still seem to fail spectacularly with amazing regularity, often due to some small flaw? Is it just that they're still relatively niche machines and thus haven't benefited from mass manufacturing improvements? [1] https://en.wikipedia.org/wiki/File:Goddard_and_Rocket.jpg

Something like a bridge is easily possible with the gravity of our planet. If gravity were twice as strong, we would still have bridges. Orbital rockets are only barely possible (with practical, known chemical propellants). If gravity were twice as strong, we either wouldn’t have them or we would have to use very different methods of propulsion.

Given that it’s just barely possible, you can’t just make things twice as strong as you think you’d need to, just in case something unexpected happens. Anyhow when something moderately unexpected happens, that means you may get a giant fireball like we saw today.

Re: Blue Origin's New Glenn blows up during static fire test

#154
post #55

Earlier quoted context omitted.

I was speaking mainly off my reading of the discussions on the internet in recent months, but I'm assuming the impression stems from this OIG report https://oig.nasa.gov/news/artemis-lander-program-faces-sched... It seems to point to rising costs on SpaceX's end, and in my reading, is very critical of them compared to BO. >The neat thing about Artemis is it’s pushing so many boundaries that it’s reasonable to debate…

That’s a fair criticism. I’m just never remembering anyone thinking BO was the safer option.

Can't we, at worst, use Apollo-level suits - maybe actial suits? - for small Moon walks?

Re: Blue Origin's New Glenn blows up during static fire test

#155

Does anyone else find it surprising that rockets are a century old[1] and yet still seem to fail spectacularly with amazing regularity, often due to some small flaw? Is it just that they're still relatively niche machines and thus haven't benefited from mass manufacturing improvements? [1] https://en.wikipedia.org/wiki/File:Goddard_and_Rocket.jpg

> Is it just that they're still relatively niche machines and thus haven't benefited from mass manufacturing improvements?

Until very recently they were basically all custom with extreme tolerance requirements and absolute specifications. Nobody could have an "off day" on a single bolt, hose, nut, screw, wiring harness, etc.

Re: Blue Origin's New Glenn blows up during static fire test

#156

Does anyone else find it surprising that rockets are a century old[1] and yet still seem to fail spectacularly with amazing regularity, often due to some small flaw? Is it just that they're still relatively niche machines and thus haven't benefited from mass manufacturing improvements? [1] https://en.wikipedia.org/wiki/File:Goddard_and_Rocket.jpg

Rockets are bombs. Rockets are big bombs. For a rocket to work correctly, you want it to explode a little more gently, and in one direction. The subtleties of making it explode a little more gently are where all of these failures are found.

Re: Blue Origin's New Glenn blows up during static fire test

#159

Does anyone else find it surprising that rockets are a century old[1] and yet still seem to fail spectacularly with amazing regularity, often due to some small flaw? Is it just that they're still relatively niche machines and thus haven't benefited from mass manufacturing improvements? [1] https://en.wikipedia.org/wiki/File:Goddard_and_Rocket.jpg

https://web.archive.org/web/20120503175355/https://www.nasa.... > The percent propellant has huge implications on the ease of fabrication and robustness in achieving the engineering design (and cost). If a vehicle is less than 10% propellant, it is typically made from billets of steel. Changes to its structure are readily done without engineering analysis; you simple weld on another hunk of steel to reinforce the fra…

Nice and to the point.

Thanks for the link.

Re: Blue Origin's New Glenn blows up during static fire test

#160

Earlier quoted context omitted.

Simplest explanation comes from Tory Bruno: they design with a factor of safety just above 1. 1.1 to 1.25. This is one of the reasons they wait for good weather to launch… they are trying to maximize payload. Also until recently, it’s been sort of a vicious cycle: rocket is very exquisite and expensive, so spacecraft needs to last longer and thus gets more exquisite and expensive, etc. Have you seen how many issues r…

One might make the same observations about software “bugginess” and complexity. The pace of improvement is such that everyone is riding the bleeding edge and, as such, the carpet inevitably gets a few spots of blood on it.

Software quality sucks because the consequences for getting it wrong are low for the people and organizations making it.

Which is often fine, but sometimes isn't.

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