[HN Gopher] High Voltage "Lifter"
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High Voltage "Lifter"
Author : mindcrime
Score : 35 points
Date : 2021-01-11 02:12 UTC (19 hours ago)
(HTM) web link (electricmuseum.com)
(TXT) w3m dump (electricmuseum.com)
| opwieurposiu wrote:
| These are pretty easy to make, using an old CRT monitor as the HV
| power supply. I made some in the early 2000s. Back then there was
| a lot of chatter about how "asymmetric capacitors" could provide
| reactionless propulsion. Of course it turned out just to be an
| inefficient and dangerous way to make a desk fan.
| dharmab wrote:
| A team at MIT made an ionic wind glider a couple of years back
| that flew across a room.
|
| https://news.mit.edu/2018/first-ionic-wind-plane-no-moving-p...
| beerandt wrote:
| I always used neon-light transformers.
|
| Dirt cheap or even free, since bars often had promotional ones
| they didn't pay for, or ones with broken glass that they were
| happy to be rid of.
|
| I also clearly remember thinking that these were a lot safer to
| use than old CRTs, but I have no idea why and don't recall the
| reasoning for it.
| phkahler wrote:
| Townsend Brown. I knew a guy who spent years trying to
| replicate that stuff. Wonder what became of him?
| amelius wrote:
| Video: https://www.youtube.com/watch?v=Xn8CLhEU4jA
|
| By the way, if you like this then you might also like this video
| about acoustic levitation:
|
| https://www.youtube.com/watch?v=ABjRnSYw-4k
| mrfusion wrote:
| I really think there's a lot of potential for high voltage
| technologies. No one really explores it because it's absolutely
| terrifying.
| benibela wrote:
| I tried to build one in high school, but it did not work :(
|
| I think the school had a hand powered high voltage generator with
| some kind of leather band
|
| I took it to university and gave it to a professor who might have
| a more stable HV power supply. I got it back after a year, and
| they said it was too dangerous to try it out, or something
| 0_____0 wrote:
| probably would have worked on a real hv supply. maybe time to
| reprise the experiment? :)
| jacquesm wrote:
| Related (not electrostatic, but also propulsion without
| macroscopic moving parts):
|
| https://en.wikipedia.org/wiki/Magnetohydrodynamic_drive
| phreeza wrote:
| I wonder if the same effect could be used in reverse to build a
| solid state wind "turbine"/generator without any moving parts.
| opwieurposiu wrote:
| Yes, such a thing exists!
|
| https://medium.com/greener-together/the-solid-state-wind-ene...
| dharmab wrote:
| Yes, you can even build a glider!
| https://news.mit.edu/2018/first-ionic-wind-plane-no-moving-p...
| gus_massa wrote:
| I think it is possible to use this as a fan, but this design is
| very inefficient.
|
| Somewhat related: https://en.wikipedia.org/wiki/Ion_thruster
| hatsunearu wrote:
| My first exposure to this was Steins;Gate. Bit obscure unless you
| take a close at the S;G lore though. It's merely a passing
| reference in the anime AFAIK
| wolfram74 wrote:
| This same principle has been incorporated in full blown air
| planes. Admittedly very short operational range at the moment
| https://www.youtube.com/watch?v=IorDYGI1uqc
| dharmab wrote:
| From reading their research, it seems the range was
| artificially limited to the size of the gym because the team
| didn't have access to a larger test area.
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(page generated 2021-01-11 22:02 UTC)