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Comment on Floating turbine towers above — the S1500 hovers to harvest wind at 131 feet

The wind at 32,000 ft is 200 times stronger than the wind at the surface?

Ummm… 10 knots * 200 = 2000 knots. I don’t think so lol.

A lot of strange numbers in this article that bring its accuracy into question.

No mention of the weight of a 1 and 1/2 km wire that is also suitable to anchor this thing in place. Or are they going to float batteries and bring them down to discharge?

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drosophila@lemmy.blahaj.zone ⁨2⁩ ⁨days⁩ ago

Ummm… 10 knots * 200 = 2000 knots. I don’t think so lol.

First of all, kinetic energy scales with the square of an objects velocity.

Second, since we’re not talking about a single object but a continuous stream of fluid, increasing the air speed not only increases the enegy per unit mass of air, but also the units of air per second that pass through the turbine. Which means that the amount of energy extracted scales by the cube of the wind speed.

kpenergy.in/…/calculating-power-output-of-wind-tu…

So, more like going from 10 knots to 60.

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- nucleative@lemmy.world ⁨2⁩ ⁨days⁩ ago
  Didn’t think about the possibility of a kinetic energy unit, thanks for the insight
  
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DoubleDongle@lemmy.world ⁨2⁩ ⁨days⁩ ago
I can’t be arsed to dig up the equation, but it may mean that the wind has 200 times more usable energy, which I think is a cube function of its speed. Wouldn’t be 2000 knots in that case

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turdburglar@piefed.social ⁨2⁩ ⁨days⁩ ago
they gonna use magsafe connectors for wireless transmission, duh.

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- anomnom@sh.itjust.works ⁨2⁩ ⁨days⁩ ago
  You’re starting to sound like a chatbot now, MagSafe connectors aren’t wireless. That’s the point!
  
  (I know you’re probably not a chatbot)
  
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  - turdburglar@piefed.social ⁨1⁩ ⁨day⁩ ago
    what’s the magnet phone charger with no metal contacts called then?
    
    that’s what i meant…
    
    em dash em dash
    
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    anomnom@sh.itjust.works ⁨1⁩ ⁨day⁩ ago
    Qi? Maybe Apple reused the term for the phone charger too, but it was originally for the MacBook pros, then later MacBook airs, and the whole line, besides an annoying usb c only model or two.
    
    That’s annoying as hell if they did that.
    
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My_IFAKs___gone@lemmy.world ⁨2⁩ ⁨days⁩ ago
Maybe it means the kinetic energy of the wind, which I believe scales against its velocity-squared?

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XeroxCool@lemmy.world ⁨2⁩ ⁨days⁩ ago
I’m thinking it’s about consistency. 10kts 10% of the time vs average 150kts 100% of the time (the math is a little off but we’re in hypothetical estimates already)

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