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Old 04-14-2009, 02:13 AM   #24 (permalink)
Ernie Rogers
Ernie Rogers
Join Date: Feb 2008
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Ohhh, okay,

I guess that's how serendipity works.

Ernie Rogers

Originally Posted by bwilson4web View Post
I was thinking more along the line of a Rockwell hardness tester approach only using a ball instead of conical tip:
Rockwell hardness testers in portable, bench and automatic digital hardness testers

The idea is to measure the tread material elastic recovery to get an idea of the hysteresis loss. But Michelin did a similar demonstration a year or so ago.

They had two large cars, one with low rolling resistance tires and the other without. They set them on identical "U" tracks in neutral and started them rolling. The low rolling tire car stopped last.

Bob Wilson
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