You would need to supply a lot of power just to maintain a vacuum and levitating... | Hacker News

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mekkkkkk on Sept 9, 2020 | parent | context | favorite | on: Gravitricity – Fast, long-life energy storage

You would need to supply a lot of power just to maintain a vacuum and levitating your flywheel. Not sure this solution would be very effective. Maybe with superconductors, but then cooling is your problem instead.

teekert on Sept 9, 2020 [–]

Or use normal magnets (non-electro magnets) The vaccuum, sure, this may take some energy depending on the insulation.

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