Quote:
Originally Posted by Brandon Holley
About the testing setup- the wheels are mounted on a pivot arm, weight is applied at the end of the arm thus giving a standard "normal" force to any wheel placed in the rig. A torque wrench was utilized, and torque was applied to each wheel (each wheel being affixed to a shaft). We then recorded the torque each wheel experienced right up until it slipped. Pretty simple.
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What precautions did you take to make sure the force on the torque wrench handle did not change the normal force?