Comment on Honda successfully launched and landed its own reusable rocket

KindnessIsPunk@lemmy.ca ⁨1⁩ ⁨month⁩ ago

• JuxtaposedJaguar@lemmy.ml ⁨1⁩ ⁨month⁩ ago

  I wonder if hydrogen fuels poses any unique risks as compared to petrol.

  It’s highly explosive.

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  • TranscendentalEmpire@lemmy.today ⁨1⁩ ⁨month⁩ ago

    I mean so are the shells tank fire. If you are hit hard enough to hit the fuel cell in a tank…you have other problems.

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  • sugar_in_your_tea@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

    Something something hindenberg…

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    • Cocodapuf@lemmy.world ⁨1⁩ ⁨month⁩ ago

      Well, different. You’d have highly compressed hydrogen in a cylindrical pressure vessel.

      The Hindenburg just burned, actually it was mostly its highly flammable paint that caught fire. When a pressure vessel is ruptured, it explodes in a big way, or it quickly removes itself from the vehicle like a mini rocket.

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  • xavier666@lemm.ee ⁨1⁩ ⁨month⁩ ago

    It’s highly explosive

    That’s … why i’m here

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  • muusemuuse@lemm.ee ⁨1⁩ ⁨month⁩ ago

    This is a feature, not a bug.

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  • stephen01king@lemmy.zip ⁨1⁩ ⁨month⁩ ago

    Is petrol not?

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    • Jrockwar@feddit.uk ⁨1⁩ ⁨month⁩ ago

      In different ways. For example, it’s very rare for a car to explode in a collision, other than in movies.

      One of the reasons that make hydrogen difficult to work with in this sense is that hydrogen (H₂) molecules are so small that they can permeate most materials, such as steel. Then it can get somewhat easily to wherever there is a spark, and chaos ensues. Annoyingly you don’t even need 100% Hydrogen for that to happen, as it can ignite with a concentration of just 4%.

      After we stopped using Hydrogen mostly as a consequence of Hindenburg’s accident, it’s taken years to perfect hydrogen fuel cells to a safety standard that can be used in cars. As far as I know, its use has been limited to rockets/space propulsion otherwise (where you can just throw millions at the problem to make it safer).

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      • xavier666@lemm.ee ⁨1⁩ ⁨month⁩ ago

        (H₂) molecules are so small that they can permeate most materials, such as steel

        Okay, I knew from texts books that H2 is small but I never thought of the real-life consequences of it being so small. Then theoretically, Helium should also be “leaky”, right?

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• SupraMario@lemmy.world ⁨1⁩ ⁨month⁩ ago

  Explosion wise or climate wise?

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  • KindnessIsPunk@lemmy.ca ⁨1⁩ ⁨month⁩ ago

    I guess both?

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    • SupraMario@lemmy.world ⁨1⁩ ⁨month⁩ ago

      At the end of the day, making EV cars isn’t either unfortunately…but in the grand scheme of things. Both hydrogen and EV cars are more environmentally friendly than gas powered cars.

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      • MystikIncarnate@lemmy.ca ⁨1⁩ ⁨month⁩ ago

        Manufacturing of any kind always causes an environmental impact. This is the way of things.

        The one thing we can’t get that would mitigate the environmental costs of making stuff, is if stuff was built to last…

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    • merde@sh.itjust.works ⁨1⁩ ⁨month⁩ ago

      any sources?

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      • KindnessIsPunk@lemmy.ca ⁨1⁩ ⁨month⁩ ago

        For the production of the tank itself or the likelihood of environmental impact?

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• Bravo@eviltoast.org ⁨1⁩ ⁨month⁩ ago

  Well, they’re DEVELOPING them. They’re not MAKING them yet.

  www.hydrogeninsight.com/transport/…/2-1-1728622?z…

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