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Magnetic Propeller


liuxiaod

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On the most abstract level (I have little interest in specific setups tbh) I can tell you for a fact that electromagnetism locally conserves energy-momentum, just like any other interaction in nature:

\[\triangledown \cdot T_{(EM)} =0\]

As such, it is not possible to get “free energy” from a magnetic field on fundamental grounds, irrespective of how the apparatus functions in detail. At the very least you would need to invest the same amount of energy as you need to propel the spacecraft, into making the magnets in the first place.

Edited by Markus Hanke
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