Jake Anderson wrote:
> The field of stopping a rotating metal disk is a fairly thoroughly
> explored field, they are called car brakes.
> I'd wager with a hydraulic accumulator, shop air, and some ABS/brake
> components you could stop the blade near arbitraily fast.
> damage to the blade would be minimal, though you would want to check it
> for warping if it got used often.

I don't think that car brakes are designed to stop "arbitrarily fast", 
compared to the time scales in question.

Vitaliy 

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