Reinventing the flywheel
Giant electricity storage and generation units might help power grids run more smoothly
Even electric utilities can use a little extra power now and then. Usually, they get it by burning more coal, oil, or gas. Beacon Power Corp. says it has a better idea: massive rotating flywheels that store power like giant alkaline batteries spinning at twice the speed of sound. (Full article: 1017 words)
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