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Ferrofluid torus/helmholtz ufo engine In the inner ring of the torus you´ll put some ferrofluid and stick those 2 torus parts together and after that you´ll put some copper wire around it like a rodin/torus coil. demonstration: https://www.youtube.com/watch?v=1-tHRDkfWdE

Ferrofluid torus
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Ferrofluid torus
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