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Presumably the flywheel will slow down if the stored energy is not used?

April 26, 2017energy flywheel presumably slow stored Used

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Presumably the flywheel will slow down if the stored energy is not used?

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The flywheel will slow down due to friction in the bearings and seals but because it runs in a vacuum the losses are low. The losses equate to around 2% of stored energy per minute but in normal road use this is no concern as the 95th percentile stop time is only 55 seconds.