Re:New Record Bid Set for World's Cheapest Solar, Undercutti...
by basicplus2 on Thursday May 05, 2016 @06:07AM
(#11634911)
composite thin cylindrical flywheels have great energy storage characteristics
"greater than 400 Wh/kg can be achieved by certain composite materials"
https://en.m.wikipedia.org/wiki/Flywheel_energy_storage
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