[ExI] not that rare earth (part 2 of at least 2)

[Ben Zaiboc]

On 01/11/2025 13:32, spike wrote:
> Regarding my post on fire-resistant power storage, I am surprised no one checked my estimates.
I'm surprised no-one has mentioned flywheel storage. Inherently 
fire-resistant (there's nothing to catch fire), can store large amounts 
of energy, can be buried in the ground, and things built on top of them 
if desired, very long lifetime, very good reliability, easy to build, 
very fast charging and discharging times. The only downside I can see is 
the need (or at least desirability) for rare-earths for the magnetic 
bearings. Which might not actually be a need, if spike is right.

-- 
Ben