#hoverboard #slide #lexus
The Lexus “Slide” hoverboard isn’t set to go on sale but a prototype was recently put through its paces by pro-skateboarder Ross Mcgouran at a custom-built skate park in Barcelona.
It’s an amusing coincidence that, while Back to the Future featured technology called a flux capacitor, the Slide relies on something called flux pinning, as well as a principle called the Meissner effect. And this all works because of something called superconduction.
A superconductor is a material cooled to a very low critical temperature that, when you run a current through it, experiences no electrical resistance.
The Slide hoverboard contains a series of metal alloy superconducting blocks cooled to -197°C by reservoirs of liquid nitrogen.
The track below contains three magnets that induce a current in the blocks, causing the Meissner effect to take hold and expel the magnetic field back towards the track in a mirror image.
These mirroring magnetic forces repel each other and so the board is lifted above the track. Even if someone stands on the board, the magnetic forces are strong enough to keep it levitating because the lack of electrical resistance in the superconductor means the magnetic field can adjust to deal with external pressure.
But another scientific phenomenon makes the hoverboard even more stable. When the cooling process is switched on and the blocks in the board become supercondutors, they effectively trap the lines of the magnetic field from the track. This causes the blocks to be pinned at a fixed height above the track, a process known as flux pinning, which provides much more stable levitation. Flux pinning ensures the hoverboard doesn’t deviate either horizontally or vertically from the track.
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