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[–] 37 points 10 months ago (4 children)
  • [–] 19 points 10 months ago

    Feels very much like the future is finally here. We're accelerating

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  • [–] 15 points 10 months ago (1 child)

    Now make it cool looking like a dragon or silly like whale or ufo

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  • [–] 9 points 10 months ago (1 child)

    I wonder how it compares in size to a traditional windmill of similar power, and how densely they hope to pack them (units per acre). I bet you can barely notice it 2 km away even though it's almost 200 feet long

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  • [–] 9 points 10 months ago (2 children)

    I'm curious about helium leakage from the envelope and how that will be managed. I can understand why they chose helium to lift it, but it is notoriously hard to contain. If this scales up, they are going to need a constant source to replenish losses.

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  • [–] 1 point 10 months ago (1 child)

    I think you could probably refill them by pumping new helium in but what I'm wondering is how you deal with the air pollution problem. No matter where you are in the world you're going to have some degree of corrosive and toxic materials in the air, but all across China there are smog clouds that already pose maintenance issues for tall buildings.

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  • [–] 1 point 10 months ago

    Fascinating, I would have assumed there this wasnt a big issue with air pollution and corrosion but that would just be my ignorance on the subject.

    I do wonder how sustainable this would be from the helium perspective, it has a high potential for supply constraints and is largely dependant on gas/oil extraction currently. Hydrogen, doesnt have that limit but brings a whole lot of engineering and safety issues with it.

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  • [–] 2 points 10 months ago

    makes sense over deserts and large bodies of water, ideally they'd find ways to redirect lightning strikes, or be able to channel them and use hydrogen instead of helium - maybe individual H bags enclosed within a larger envelope of the lighter inert

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  • [–] 5 points 10 months ago (3 children)

    Interesting but i have a number of serious doubts about this ever becoming a viable technology. Foremost of which is what happens if the helium container bursts? It would result in a massive building-size object crashing to the ground anywhere within a 6500 foot radius of the ground tether point.

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  • [–] 17 points 10 months ago

    I would imagine that you would segment the lifting bodies so that a leak or rupture in one or even a couple wouldn't bring the whole thing crashing down. Ships don't sink from a couple leaks here and there. You would also monitor buoyancy. The tether site needs to have some sort of reel in capability for servicing.

    All of your concerns seem to be addressable through proper engineering considerations.

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  • [–] 6 points 10 months ago*

    As long as the crash rate isnt higher than those of airplanes i think there shouldnt be any complaints. Or are you constantly scared of a plane full of much more dangerous kerosine crashing into your house? And i dont see why it shouldnt be possible to make them as secure as or more than planes. They will surely be inspected regularly just like normal wind turbines so its just not an argument at all i think. Their location being fixed also makes them much less dangerous because you can just put them on mountains where nothing much exists.

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  • [–] 3 points 10 months ago* (1 child)

    There is so many problems with that concept: What do you do when there is a strong storm? What happens if lightning strikes? How do you do maintenance and how pricey is that? How do you get the power down properly? You also have to keep a ton of space clear from buildings/people if that thing somehow starts flying away/down...

    Normal wind turbines can likely do a better more efficient job - at a fraction of the cost of this public relations stunt.

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  • [–] 7 points 10 months ago

    I think this is a technology demonstrator. They're figuring out the answers to the exact questions you are asking. This was the first test of putting it up, getting the power down properly, and then bringing the system back down. Following one of the links inside that article shows that they've previously tested the mechanical design out in the desert to test deployment, station keeping, and retrieval under high winds. As for cost, I'm sure they did analysis and have some use cases where they can compete, though I doubt that it's in urban areas because it's gonna have to be pretty far from airports and houses in "drop in on" range

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  • [–] 3 points 10 months ago

    They got the idea from Big Hero Six.

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  • 8 comments in c/science@beehaw.org view that post
    [–] 6 points 10 months ago (5 children)

    Is it able to fly in high winds?

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  • [–] [S] 7 points 10 months ago (4 children)

    It would be a pretty significant design flaw if not.

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  • [–] 5 points 10 months ago* (3 children)

    You would think so but even normal ground-fastened wind turbines shut off when winds get too strong.

    This being somewhat of an aircraft I absolutely expect them having to land it before storms roll in.

    If you land it facing up- or downwards and deflate the balloon segments it would probably be fairly flat and compact for storage.

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  • [–] 2 points 10 months ago (2 children)

    somewhat of an aircraft

    I'm imagining this is more like a kite. The thing still needs a tether to give th power back, and you don't want it to have an engine itself as that would take away the power you generated

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  • [–] 1 point 10 months ago

    Absolutely. Maybe a poor choice of words on my part. My intention was to state that this is not a thing you simply hang out in the wind and leave, but instead a vehicle that needs to be controlled to stay within its operational envelope.

    I can imagine problems like tethers or lines getting crossed when the vehicle makes fast turns due to wind shear or frequent direction changes. You probably can't operate it in those conditions.

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  • [–] 3 points 10 months ago

    Hell yeah can't wait to fly my own powerkite.

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  • [–] 1 point 10 months ago

    How often does it need to be reached with helium?

    I imagine it has some portion of leakage through the material and it's a lot of friggen helium, which is already in dwindling supply.

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