Magical Bed Hovers in Midair with Magnets



Frakking beds -- how do they work? Redditor mememetatata's design is simple but brilliant. It's just two wooden frames with opposing magnets inside. When assembled, the bed hovers a few inches off the ground.

It looks like the biggest problem that mememetatatta faced was that two of the magnets were shipped together. Each one had several hundred pounds of force, so he spent considerable effort separating them -- and photographing that part of the project.

Link and Gallery -via Geekosystem

I think you could do it without cables if you had magnets at the edge of the frame oriented horizontally with opposing magnets mounted on 4 x 4s screwed to the lower frame so the bed would be repelled toward a center position between the 4 x 4s. One set of magnets oriented vertically for lift, one set of magnets oriented horizontally for centering.

I don't see why it wouldn't be possible to use cables crisscrossed under the bed to stabilize it without the tripping hazard, with cables running from a screw eye at each corner of the bed to a screw eye on the base below the opposite corner.
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Holy hell, I'd have been scared of finger amputation trying to separate those two magnets -- and of screw shrapnel should those have been ejected by the magnets crushing together.
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From Earnshaw's Theorem, there's no way to use static magnets to cause levitation on their own. You either need active controls or you need some sort of physical support. Otherwise it will slide to the side (or perhaps top/bottom). You can use wires if they are nearly horizontal to prevent that action, or use posts under the bed. It's cooler to point under the bed and point out the lack of support.

You can get around Earnshaw's Theorem with superconductors, if you want to sleep over a large pool of liquid nitrogen. Perhaps someday, with room-temperature superconductors, we'll all be able to sleep on floating beds.
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I would really be impressed if there would be no steel cables necessarry...

I also would have preferred if the cables had been placed under the bed to avoid any tripwire effects...

However i would like to have some of the magnets..
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