/sci/ - Science & Math

[Anonymous No.9437210]

If we can make a really strong magnet.
Can we make a aircraft that use magnetic levitation to ride on Earth's magnetic field?

[Anonymous No.9437259]

>>9437210

Yes, but it first requires us to understand that gravity and magnetism are the same thing with gravity being incoherent dielectric acceleration and magnetism being coherent. Distort the bloch wall coherently enough and you will negate the weight of the craft, not by making it weightless per say, but "projecting" it's weight in a medium where it doesn't weight as much (like space).

Weight is nothing other than medium specific. To assign a "weight" to a mass is the same as figuring out how many leprechauns are in it, it doesn't have any.

[Anonymous No.9437346]

>>9437210
Probably not.
If you were at, say, the North magnetic pole, you could build a solenoid with the North pole down, which would lift -- and then promptly flip over and fall. It's unstable. And it would have to be very small or the internal field-forces would shred the coil. (That is, the field passes through the center of the coil and field lines don't like being confined. They repel each other and that means they'll try to explode the torus.)

The flying island of Laputa was suspended by a lodestone on a pivot so either end could be pointed down. Same objection.

The ARE toys which will hover over a magnetic base and left right-side up by gyroscopic spin. Google "Magnetic levitation toy" to see one.

>>9437259 is gibberish.

[Anonymous No.9437488]

>>9437346
>Probably not.
>If you were at, say, the North magnetic pole, you could build a solenoid with the North pole down, which would lift -- and then promptly flip over and fall. It's unstable. And it would have to be very small or the internal field-forces would shred the coil. (That is, the field passes through the center of the coil and field lines don't like being confined. They repel each other and that means they'll try to explode the torus.)

>>>9437259 is gibberish.

hahaha the "explode the torus" part really got me. Also using a fairy tale to make a point, wew lad.

https://www.youtube.com/watch?v=A5pZZJ23rDM..

[Anonymous No.9437513]

>>9437259
>per say

[Anonymous No.9437562]

>>9437488
The bismuth cube levitates because it's diamagnetic. It has no poles of its own. It has a lower permittivity than free space, so the external field attempts to reach the lowest energy configuration by expelling the cube to an area of lower flux.
Diamagnetism is weak compared to ferromagnetism. You can't levitate much. And it's the field-divergence, rather than the sheer intensity of the field which makes it work, so you're limited to quite small areas.
Yes, you can make tiny frogs levitate too. Water is also diamagnetic, but much less so than bismuth, and it takes a heck of a field to pull off the stunt.

One of the ways to generate an intense field is to take a thick-walled pipe and cut a slot along its length Then you dump the output of a capacitor bank into it so the current runs around the circumference. Very high flux inside the pipe -- for the few milliseconds before it melts and explodes from internal pressure. Even higher flux if you surround the pipe with explosives and crush it while the field lasts because that compresses the field lines together.
https://en.wikipedia.org/wiki/Explosively_pumped_flux_compression_generator

[Anonymous No.9437607]

So in theory it possible or not ?

[Anonymous No.9439291]

>>9437607
Not. Regardless of how strong we can make magnets, we can't make the Earth a strong magnet. It has a big field, for you anyway, but it is not strong. Unless you consider subatomic particles aircraft, it is not possible.