Australian Synchrotron is already using three giant flywheels as an UPS, here is a short presentation. I am sure that you will be able to find enough informatio

Australian Synchrotron is already using three giant flywheels as an UPS, here is a short presentation. I am sure that you will be able to find enough information to determine if doing this would be feasible on a commercial scale. http://www-conf.slac.stanford.edu/wao2012/talks/Thu_Aug9/McGilvery_The20Improved20reliability20with20a20UPS20at20the.pdf http://www-conf.slac.stanford.edu/wao2012/talks/Thu_Aug9/McG...