Elie
Created page with "Flywheels are a proposed solution to part of the energy storage problem. Flywheels store energy mechanically by spinning a heavy rotor at high speeds. This has been implemented before, both inside vehicles {{x|but not necessarily storing enough energy to power the vehicle for more than a few kilometers at best}} ''and'' in stationary electrical systems {{x|with a much higher specific energy}}. ===Viability=== {|class="wikitable" |#Need for iron |Not too bad |-..."