• SkaveRat
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    27 days ago

    because helium is f’ing expensive an valuable. Once used, it’s basically gone. There’s a reason that countries have strategic helium reserves.

    Also on the topic, modern day companies that try to resurrect airships exist. Just every single one of them goes bust, as it’s just not really a viable solution for modern transport

    • officermike@lemmy.world
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      27 days ago

      On the optimistic side, helium is a product of nuclear fusion, so we will eventually be able to produce it.

      • qjkxbmwvz@startrek.website
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        27 days ago

        I’m too lazy to work through the numbers but I think helium production would be very small — which is another way of saying fusion (as envisioned for energy use) produces a huge amount of energy.

        • grue@lemmy.world
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          27 days ago

          fusion produces a huge amount of energy.

          That’s the kind of claim that’ll age like “640k ought to be enough for anyone.”

          • qjkxbmwvz@startrek.website
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            27 days ago

            Googling around, you get about 1e11 kJ/gram of He produced (source.

            Wikipedia says Hindenburg volume is 200,000 m cubed . Multiply by density of He at stp and you get north of 1e7 grams.

            Multiply and you get 1e21 J. Estimate for worldwide energy consumption in 2010, from Wolfram Alpha, is half of that.

            So, if all energy were from local fusion, it would take about two years of production to fill a single Hindenburg-sized Zeppelin. That is a huge amount of energy.

            I don’t think it’s equivalent to compare energy with RAM like this. Energy is the realm of thermodynamics; things like boiling water don’t care about technology, they just need a certain amount of energy. Unless we’re talking about fundamentally new uses of energy, like floating cities or something whacky, I think the amount of energy here is really, really big.

    • pete_the_cat@lemmy.world
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      27 days ago

      If it’s so “expensive and valuable” then why have we been using it for decades to fill balloons here in the US? It costs like a few bucks to buy a bunch of balloons and get them filled. I just looked it up and Dollar Tree (a dollar store) will fill them for free as long as the balloons are purchased there.

      You can buy a 14.9 cubic foot tank from Amazon for $80 (unfilled of course), which is enough to fill 50 balloons.

      • SkaveRat
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        27 days ago

        If it’s so “expensive and valuable” then why have we been using it for decades to fill balloons here in the US?

        good question! lots of people actually lobby to wither ban this (unlikely that it will happen) or at least make it more expensive.

        Helium is increadibly important in the medical and science field. Having it “wasted” in party balloons is honestly, well, wasteful (if fun).

        Helium is already getting more expensive, and it will only rise in the future

        The reason it was so cheap in the last couple decades is, that the US basically sold off most, if not almost all of its stockpile, dumping the price on the market.

        And now with very few sources for helium worldwide, the price will go up massively in the next couple years

    • GenosseFlosse@lemmy.nz
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      27 days ago

      You know whats basically free, lighter than helium and not dangerous: Vacuum! /s

      Quick, someone give me Elons private number, i know how to revolutionize air travel!!1!