Quote:
Originally Posted by zbrozek
It has a lot of drag compared to motors I'm used to. Brushes? Bearings? I'm not sure; I haven't taken one apart.
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Brushes and bushings. Unpowered it seems like a lot; they don't freewheel much. However that friction is trivial when under typical FRC loads.
FIRST uses brushed motors (as opposed to brushless) because they are inexpensive, durable and plentiful. I vaguely remember an official discussion on this topic from 4 or 5 years ago.
Great post, I'd love to see this as a whitepaper.