Quote:
Originally Posted by jgraber
Re COF measurements: Is there a difference between static friction with a rolling wheel, vs static friction on a fixed wheel? It sounds like most people are measuring with a drag sled fixed wheel.
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Quote:
Originally Posted by Abwehr
Rolling friction (where the surface of the wheel at its bottom point doesn't slip relative to the floor) should be equivalent to static friction for non-deformative surfaces.
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Yes, so I have been taught as well. I'll rephrase my comment/question as
"When reporting local COF measurements, please include details of your methodology, such as using a fixed wheel drag sled, vs using a weighted robot with KOP wheels pulling a scale pulling a dragsled.