TIL at the largest flywheel energy storage in the world, Each 775-ton flywheel can spin up to 225 rpm and store 3.75 GJ,[44] roughly the same amount of kinetic energy as a train weighing 5,000 tons traveling at 140 kilometres per hour (87 mph).

Read more: https://en.wikipedia.org/wiki/Joint_European_Torus

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  1. You know they had a plan to power cars with flywheels abut 20 some years ago; I remember reading about it in Discover magazine. Electric and magnetically powered and made out of carbon and iron, no chemical batteries at all. But the big automakers decides gasoline/battery was the way to go so a potentially game changing innovation never happened.

  2. Am i going to the wrong article?

    This link takes me to a wikipedia page talking about a fusion reactor and plasma storage, magnetic fields….not one thing about a flywheel that i saw.

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