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Joined 2 years ago
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Cake day: June 19th, 2023

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  • Beyond just being able to draw a bow, being able to draw it well enough to have a chance of shooting at all repeatably takes a lot of training - it’s not just lifting a 50+lb weight, pulling it towards you with one and and pushing it away with the other while keeping your arms stable requires a lot of strength in muscles the people don’t tend to use.

    Source: former colleague is an international competition level archer - the sheer amount of core strength and coordination and balance you need to be a good archer is wild













  • The thing people don’t really get about “bullet proof armour” is that it’s job is to stop the bullet going into you and messing up your fragile internals - but Newton still wins. The force still has to go somewhere.

    Imagine someone held a stake to your chest then someone else smacked it with a sledgehammer - this would be a Very Bad Time for you, what with all the bleeding and internal trauma. If instead someone held you down with a steel plate and that was sledgehammered with the same force - it would hurt like hell, but probably not do the same amount of internal damage because the force is distributed over a wider area. There is of course a limit - at some point the force is still going to be too high and cause fatal damage.

    Helmets work the same way - the internals of your head are very fragile, so keeping the bullet out is pretty important, but the same problem exists. The force has to go somewhere, and while getting whacked in the face with a sledgehammer is better than having a stake driven into your forehead it not that much better




  • RegalPotoo@lemmy.worldto3DPrinting@lemmy.worldDust.
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    2 months ago

    It’s not that they are particularly loud, it’s that the noise they do make tends to be quite “whiney” and high pitched and can get quite annoying after a while.

    The problem with putting it outside is that big temperature swings (+/- 10C or so) could cause warping or other problems while printing - the plastic needs to cool at a fairly consistent rate, otherwise you end up with inconsistent sizing on your z-axis.

    Filament itself also doesn’t like moisture, so if you live somewhere where you get close to the dew point overnight you could easily ruin the whole spool of filament



  • Technology wise, aircraft are already 90+% automated - autopilot does basically the whole cruise phase, pilots are there to do the communication with ATC, manage the autopilot, and be hands on for taxi, takeoff and landing.

    From a legal/policy perspective, the aviation industry is held to a much higher standard of reliability and safety than the automotive industry - the AI driven YOLO that companies like Waymo get away with. It’s not just that autopilot systems have to always work, it’s that they have to always behave in a predictable way.