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Cake day: June 10th, 2023

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  • Badabinski@kbin.socialtoMemes@lemmy.mlGotta get it right
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    11 months ago

    I hate righty-tighty lefty-loosy. Depending on whether you’re looking at the top or bottom of the screw, you can see movement to the right or the left. I hate whoever came up with it, and I wish I had been taught the right hand method. It works exactly the same as the electromagnetic right hand rule:
    an example of the right hand rule as it relates to a screw thread

    Basically, you take your right hand, stick your thumb out, and curl your fingers like you’re grabbing a broom handle. Point your thumb in the direction you want the screw to move to. Want to screw something in? Point your thumb towards the thing. Want to unscrew? Point your thumb away from the object the screw is currently in. Then, just look at the way your fingers are pointing! If it helps, squeeze your fingers into a fist and see which way they move. Alternatively, bend your wrist in, and observe which way your fingers are moving. Works every time.

    It sounds complicated, but there are plenty of people who are unable to intuitively differentiate from right and left the way they can differentiate up and down. I am one of those people. Thanks to this method, I’ve been able to develop the muscle memory/intuition to know which way to turn a screw.

    It’s important to note that this only works for screws that are “right hand threaded.” If the screw is only getting tighter when you’re using this method, then it’s likely reverse threaded, or left hand threaded. If that’s the case, just use your left hand instead of your right hand.



  • I’m not making this comment to disagree with your point, but the failure of the SL-1 reactor strikes me as an engineering and process failure more than anything else. The reactor was not designed in a safe fashion, probably because it was designed as a test bed for reactors that could be deployed via airplanes to the Arctic circle. The fact that an engineer was even able to fully remove a control rod, and the fact that removing that control rod lead to a fatal steam explosion make me think that they really tried too hard when they removed weight and volume from the reactor design.

    In well designed safety-critical systems, human error should not be able to cause any form of bodily harm. I don’t think it’s a great idea for a private company to be running nuclear reactors on Earth to power something as trivial as a data center (investing in storage + local solar/wind/geothermal/hamster wheel velodrome seems like a more efficient use of resources for one thing), but I also don’t think that SL-1 is the best example to cite here.

    As an aside, my high school Physics teacher went on a long diatribe about how the three SL-1 casualties were the only humans ever killed as the direct result of nuclear fission in the context of a nuclear reactor. Looking back on it, I think she was splitting hairs a bit, but it is an interesting point to make.