Comment Gimbals (Score 3, Interesting) 325
Dumb question, I suppose. But, given that the earth rotates, and given that the flywheels will have a huge angular momentum, are they gimbaled? The article says they're suspended in a vacuum, levitated on a magnetic field, which is cool. But if they're not gimbaled a huge amount of energy will be wasted fighting precession as the earth rotates.
I assume the people making these things are smart and know their shit. I'm just curious how a problem like this is solved. If not gimbals, what?