In reply to @mdcc_tester
Tnx tester. I wonder why wheels don't come with a drag coefficient. It's not hard to calculate. Put them on a work bench at a constant temperature, rotate them at a given speed and see when they stop.
Possibly because wheels tend to move through the air when they're turning. When they're on a bike. Hence the existence of wind tunnels.
@Brommers started
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In reply to @mdcc_tester
Tnx tester. I wonder why wheels don't come with a drag coefficient. It's not hard to calculate. Put them on a work bench at a constant temperature, rotate them at a given speed and see when they stop.