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Cake day: June 10th, 2023

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  • How well NixOS fits your purpose really depends on what you want to do with the OS. If you’re just going run a bunch of docker containers, you could manage them via Nix but its a little cumbersome.

    Where NixOS really shines for small servers are the so called NixOS Options. They allow you to install tons of services on bare metal but manage all the configuration for you. E.g. open the correct firewalls ports, run a dedicated DB or cache, etc. and all those simply require you to enable them with an ... = true;.

    Smaller projects might not have a NixOS Option available and some options are more and/or easier configurable than others, but if you’re running just a few common services you could feasibly manage your whole server with just one native config file and no docker shenanigans.

    I’d recommend checking what’s available under the link above. If you wanna go the container route instead, you have the option of just using docker non-declaratively as on every other distro (but then you lose some of the benefits NixOS gives you), or you can declaratively have NixOS manage all the docker containers. There are a few ways to do and manage this so some further research will be required.


  • I know this is a meme but would that actually help a rocket engine?

    They do water injection on some bomber engines and the harrier jump jet, which allows them to run even more fuel through the engine(s).

    On a rocket engine this would only make sense inside the combustion chamber, not the nozzle?

    Does flash boiling water in the nozzle add enough pressure to overcome the pressure reduction from cooling down the exhaust gasses?



  • Not an expert. This has been done quite successfully for space applications. Granted they are only required to roll out once but they have to do so with near perfect reliability. There are quite a few makes and models but I’ll reference the ones currently mounted on the ISS (ROSA made by Redwire) because you’ve probably seen pictures of them.

    Their patent states that they use polymeric sheets or fiberglass meshes as a backing material.

    Here they are in their packed up state:

    And unpacked (the brownish “smaller” panels on the right, note that they are still longer than entire human modules):















  • Great video. Something I want to touch on:

    He kinda makes the assertion that supply must exceed demand which I guess is ok for most items.

    Especially in SA once you leave a surface, demand of most items will plummet close to 0. The only demand will be ship requests and defense stuff.

    But I can’t count the number of times I had to go back and increase iron plate production, green chips, copper, red chips, etc… It’s always the same few items but as your factory grows, demand seems to always beat supply at multiple stages.

    In those cases these kinds of balancers will not distribute the little supply evenly, making parts of the factory grind to a halt which is not ideal.