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Joined 1 year ago
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Cake day: June 22nd, 2023

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  • Pretty confused about why SpaceX released this - it’s a vague, whiney, entitled message, even if they’re right!

    Parts of the regulatory process are clunky, and the goals of an environmental assessment don’t always align with the goals of SpaceX - that’s the point. I’d be concerned if the company was happy with the process.

    I don’t want to write an essay right now. I know it’s messy, and the process needs to improve. I just wish SpaceX had brought receipts before starting…whatever they just started.




  • They have, and that seems to be the industry standard. I don’t expect issues. But you can’t test everything in a full gravity vacuum chamber and SpaceX has never made an EVA suit before.

    I’m sure the depressurization process includes tons of safety measures and tests, but I’m still creeped out by a tourist flight being this experimental!




  • It stands for “maximum dynamic pressure”, and is a fluid dynamics concept. It’s the moment when the spacecraft is under the most stress, and therfore where certain things are most likely to fall apart.

    It’s caused by a combination of atmospheric density and velocity. To avoid issues, there’s a rough rule of “don’t accelerate too much until you’re high enough that the atmosphere thins out” during launch, and “don’t hit the atmosphere too fast” during reentry.

    Here’s a chart for the IFT-3 launch. At one minute you can see that acceleration decreased for a few seconds, to minimize the strength of max-Q.