Genuine question. I thought cars were engineered to be resistant to this?

It can’t just be as simple as holding a lighter next to it, right? What exactly are they using to achieve this?

Is this specific to Teslas? If not, why aren’t cars engineered to be resistant to whatever they’re using to light them on fire?

Furthermore, wouldn’t the protestors get caught? If not, then how are they evading all of this?

Just to be clear, I’m not fond of Musk. I’m just trying to understand the situation from both an engineering and social science perspective.

  • SomeAmateur@sh.itjust.works
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    10 days ago

    Has anyone actually looked at the amount of water needes to handle a tesla fire? The pdfs are available and we looked at them when I was a volunteer. It’s like 8,000 gallons or something to keep battery temps under control. Our tanker holds 2,000 gallons and foam isn’t effective like it is for normal car fires.

    A single tesla on fire needs a response similar to a house fire. Most fire response is going to be very strained with multiple, especially if they are at different locations.

    • slaneesh_is_right@lemmy.org
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      10 days ago

      I saw sonething some years ago that the german firefighters use a container and fill it with water and drop the car in for a few days.

      • sznowicki@lemmy.world
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        10 days ago

        I confirm. German firefighters once the fire is out, take the EV and put into a container full of water for about two days so all the energy is slowly going down.

        Source: I’m a firefighter in Germany.

      • SomeAmateur@sh.itjust.works
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        10 days ago

        Right and I’m sure it would work but technically Tesla advises responders not to. Idk why or what their recommended alternative might be

    • andros_rex@lemmy.world
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      10 days ago

      A single tesla on fire needs a response similar to a house fire.

      How the fuck are these things legal

  • DaddleDew@lemmy.world
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    10 days ago

    If I ever got tired of my car and wanted to burn it down somewhere safe and legal to do it, I’d do it the same way as it is usually done for any kind of car: break the window, douse the inside with a flammable liquid and light it up. I’d also have to be very careful while lighting it because if the flammable fumes have time to build up inside before being lit, it could explode and injure the person lighting it.

    • Brickhead92@lemmy.world
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      10 days ago

      A person pouring a flammable liquid should never also use an ignition source. If anything is spilt on you while pouring, it makes it much more likely you’ll catch on fire.

      If lighting something small you could open, pour close with one hand, and then use your other hand to light.

  • Vedlt@lemmy.world
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    10 days ago

    Don’t they sometimes just go up in flames on their own and lock the doors preventing anyone inside from getting out?

  • sga@lemmings.world
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    10 days ago

    Particularly for electric cars - you have very inflamable lithium batteris, which when spiked very hard (by something sharp), so multiple layers short circuit and well short circuits leads to fire. But batteries are at the bottom of the body, with few easily exposed areas (otherwise they would be at risk of explosions all time). I do not know what people are doing exactly, but you can use a crowbar like thing to hit the beneath posterior, until you expose the battery, and then 1 or 2 hits can do it, or you can skip this and use a smaller conventional explosive.

    I would like to add this - I do not condone arson. Even if anyone wants to protest - this is not the way to do it, unless you burn your own stuff, then you are only harming environment. What i wrote is purely for educational purposes.

  • DarthKaren@lemmy.world
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    10 days ago

    The problem with resistance to fire is that all the stuff that makes a car comfortable for us to use is also flammable. Foam, fabric, tires. All flammable. We an slow down things, but any accelerant will negate that.

    While we do have flame resistant fabrics and foam in there, there is no way to engineer it completely out. Cars are mainly engineered, safety wise, to resist crashes and impacts. Engineers don’t really sit around and think, “Man, what if someone lights this bitch on fire?” On an ICE, they try to position the fuel tank to where it isn’t easy to hit directly.

    Getting caught requires someone seeing you. Camera, person, whatever. As for the other evidence. Gas is easy to get, and there are millions of suspects that all hate Musk and see his products as the a symbol to him. A few may royally fuck up, but it’s gonna be a hard case to vet out.

    For or against? Not one owned by someone. I’ll leave it at that.

    Musk? He can go fuck himself with a barbed wire baseball bat dipped in citric acid.

  • ricecake@sh.itjust.works
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    10 days ago

    It’s most likely gasoline. It’s very difficult to engineer upholstery and rubber to be resistant to prolonged exposure to an open gas fire. Usually the best you can do is get to a minimum safe time for certain temperatures.

    The highest standards you’ll run into day to day are baby clothing, bedding, and residential wall insulation.
    The reasons for those being specifically regulated should be relatively obvious, and are respectively heartbreaking, scary, and sensible.

    Cars tend to be going fast when they encounter issues, and there’s a lot less ability to make a lot of assurances. As a result, cars tend to be designed for controlled failure rather than resilience. This allows to car to fail around the passengers, hopefully resulting in the car, which is totaled anyway, absorbing the damage the passengers would have otherwise gotten.
    We can make a car that can take a 45mph collision with an oak tree. We just don’t know upfront that that’s how it’s going to crash, and the squishy people inside can’t be made to tolerate a 45mph collision with the dashboard. So instead of making a perfect fuel tank, we just make sure that if it breaks it tries to rupture the fuel away from the passenger compartment. Instead of making the upholstery incapable of burning (which comes with downsides like “expensive”, “uncomfortable”, “ugly”, “smelly”, or “even more toxic than current flame retardants”) we make it able to resist burning for as long as it would take for the air inside the vehicle to become deadly hot. It doesn’t matter if the seat fabric is unscathed if the fire is hot enough to warp the metal.

    Beyond all that, Tesla’s are notoriously poorly engineered, and in that category the cyber truck is best in class. I do not know, but would not be surprised, if accelerant was simply able to seep into the more flammable parts of the car from the outside.

    As for surveillance catching the people, covering your face, obscuring identifying marks, and simply being far away by the time anyone notices the fire is a good bet. The police might try a bit harder because it’s an expensive property crime, but it’s ultimately a property crime where no one is going to be building their career on it, so there won’t be real incentive to go above and beyond.

    • arrakark@lemmy.ca
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      10 days ago

      Hot take, but I think the Model Y/Late Model 3 were really well engineered.

      • cronenthal@discuss.tchncs.de
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        10 days ago

        There are German (of course) Youtube channels that do deep analysis of Tesla build quality. They have improved to “mostly passable” but still quite cheap wherever possible.

  • Jay@lemmy.ca
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    10 days ago

    Accelerants and or/ firestarters placed near the tires. Once you get the rubber burning the rest kind of takes care of itself.

    • Gordon Calhoun@lemmy.world
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      10 days ago

      If it were a sunny day and I wanted to conduct an innocuous experiment with my own property, on my own property, and it were legal to do so in my municipality, I’d place a magnifying glass, via powerful magnet and flexible arm, such that it concentrated sunlight on the tire’s sidewall. Then I’d sit back and watch until I either got bored or had to put out any resulting flames with an NFPA-approved extinguisher and/or garden hose. Then I’d record the results in a logbook and drink a beer.

      • Jay@lemmy.ca
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        10 days ago

        Fresnel lenses (like the kind you can tear out of old projection tv’s) work great for that, but they’re kind of a pain and bulky, and very impractical. I have one I took out of an old 55" projection tv. I think charcoal firestarters by a tire works better and can be “deployed” in seconds, but concentrated light is still pretty cool. This vid shows how well they can work.

        https://www.youtube.com/watch?v=kbrXUBU_gkM

        • Gordon Calhoun@lemmy.world
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          10 days ago

          That’s awesome! I’ve tried looking for these giant lenses in the past, but never encountered any on the side of the road, unfortunately. Projection TVs are a treasure trove of awesome optical components.

          This makes me wonder how well a 1W 980nm Infrared Laser would work for burning/igniting a rubber surface.

    • alvvayson@lemmy.dbzer0.com
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      10 days ago

      I once read an article many years about how arsonists were burning expensive cars in Berlin. The journalist indeed reported that they would light barbecue starters under the tires.

      If I recall correctly, they would even place it a little bit further under the car (i.e. not the outside) so that any passerbys wouldn’t notice anything until the tire was properly burning.

      This was before Tesla’s though, which have a sentry mode

      With the more recent cases, I have read that they smash the windows and throw Molotov cocktails inside, but I think that would draw a lot of attention and make alarms go off.

      On the other hand, I think this method might have less risk of the sentry mode filming.

  • acchariya@lemmy.world
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    10 days ago

    They seem to be using Molotov cocktails - that is, about a liter of gasoline ignited and spread when the bottle breaks. Since the car body itself is metal and glass, I would guess that until the battery ignites, it’s much the same mechanism of any other car burning.

    Plastics in the wheel wells, mirrors, tires are ignited, which burn hot enough to ignite more protected plastics. Eventually, the battery is heated to the point of thermal runaway (analogous to the fuel tank in an internal combustion car), and then it burns to the ground.