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I am trying to get a rough estimate for the B-field (from a electromagnet) required to levitate a train.

Assuming the train is of mass M, the force required to lift it and hold it at a distance D would have to equal M x g right?

But how do i estimate the b-field an electromagnet would have to generate to make this happen?

Thanks for any help!

Peteboy.

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# Maglev estimate

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