Levitating Superconductor on a Möbius strip
Why Worldbuilding Stack Exchange recommends it
Worldbuilding Stack Exchange answerers point people to it as a ready visual of superconductor levitation and flux pinning when designing maglev vehicles, floating structures and magnetic gadgets.
Recommended by 2 people across 2 different months, 2015 to 2021.
What it is
Andy from the Royal Institution revisits a favourite demo from the 2012 Christmas Lectures: a superconducting boat coated in yttrium barium copper oxide gliding along a Möbius-strip track built from over 2,000 magnets. It shows the superconductor levitating both above and below the track, a result of flux pinning.
What people said
Recommends SRM · 2016-09 · Worldbuilding Stack Exchange · on “Cheap superconductors - what would consumers notice?”
A) Maglev trains. Cheap. Check out this science video and consider the large scale version in cities: [this video] B) Data bandwidth. Electricity moving data as fast as optical cable but without the line-of-sight limitations. I suspect -- you'd have to research this -- massive boost in CPU speeds... and with perfect heat ventilation. Speaking of heat... C) Heating/cooling buildings. I read a paper a long time ago that said a superconductor has no melting point as long as it can vent heat along its length. In theory, a strand of it could dangle into the sun as long as it stuck far enough out into space, because it distributes heat with zero resistance along its entire length. (It melts when heat m
Recommends Samwise · 2017-01 · Worldbuilding Stack Exchange · on “Naturally-ocurring Airborne Floating Islands - is it possible?”
Superconductors have an innate ability to *strongly* repel any and all magnetic fields from their interior, this means that when a mass of super conductor moves over a magnetic field, not only will it be lifted into the air, it can even be *locked in place* as if by some invisible force field (it's called "flux pinning") here's a good video demonstrating the effect [this video]
Cites JDługosz · 2015-03 · Worldbuilding Stack Exchange · on “Hard Sci-fi energy shields”
Same as Earth's, which serves us well: magnetism. magnetic field A superconductor can be charged with a huge current that then acts as an enormous permanent magnet. A ship may need to handle dust and gas moving at high speed relative to the ship, but that material is not charged. So charge it: spray electrons to charge dust (like a room ionizer does) or use a laser or tuned microwaves to cause gas to become ionized. Also, might say that the corona effect magnifies the results and sweeps away more than you explicitly ionized (though it's not obvious that that would be the case in a near vacuum). physical swarm controlled via flux pinning If you want something to affect material near the ship
Cites AndyD273 · 2016-02 · Worldbuilding Stack Exchange · on “Using electromagnets in tracked vehicles”
A superconductor will levitate over a magnet like it was on rails [this video] . So you put a magnetic line down your float ways, and when the vehicle is ready it just engages the superconductor and float down the road, maybe propelled by air or jets. Likewise the superconductor can be turned into a magnet [LINK] to allow it to stick to surfaces, like a ships hull, or whatever. If you really don't want any magnets in the road, you could sheet them with copper and float your vehicle over it like the Arx Pax Hendo hoverboard [LINK] .
Cites MolbOrg · 2021-03 · Worldbuilding Stack Exchange · on “Ringworld held in place around a Magnetar using Quantum Locking”
Lorentz effect for sure, will blame it on spellchecker again. "pinned" objects to be able to rotate or slide" - sliding is easy here as an example [this video] - there is plenty of that stuff "superconductor on track". the reason seems quite obiviou when a magnet is smaller compared to a superconductor, the field is more uneven on the scale of that superconductor, then yes it catches superconductor in 3 points, so to speak. But if there is a trajectory where the field isn't much different in configuration from other points of that trajectory it will be able to move on it.