Plaction Vs. Banebots Vs. HiGrip friction coefficients

[Madison]

Originally Posted by Dan.Tyler

That being said, we tested the cF of the green material to be nearly 2.5 on FRC carpet. Of course, the material in the green wheels begins to structurally fail at 2.0. The oranges fail structurally around 2.4, but are traction limited at around 2.1. We drop oranges in the center, and use greens on the outers for added pushing force. It works great for us.

When I say "fail structurally", I mean that the rubber is not strong enough to hold the traction force being applied, and will shear away from itself, leaving what looks like pencil eraser shavings on the field after hard pushing matches.

This is a really strange way of talking about coefficient of friction. The CoF between the materials doesn't change -- it's an experimentally derived constant. I understand what you're getting at with respect to the green material -- it's capable of destroying itself. I do not understand at all what you're saying regarding the orange material.

Can you restate your observation in a manner that reconciles with physics? Can you further explain what you intend to convey by listing two coefficients of friction?