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Old 05-22-2011, 09:07 PM   #10 (permalink)
Engineering first
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Originally Posted by CapriRacer View Post
. . .
They wanted to do RR Force, which makes larger tires look worse for RR. but if RRC (Rolling Resistance Coefficient is used larger tires are better - which is the way most folks would look at it. The GSA asked NHTSA to reconsider - and that was a year ago. In the meantimm, NHTSA has gotten tied up with a lot of Toyota issues!
Was "RR Force" for the same load or at the tire maximum load?

I want "RR Force" but realize it is a function of load. If "RRC" can be multiplied by the load to give "RR Force," I would be satisfied. I need "RR Force" adjusted for current vehicle weight to calculate the energy loss.

Bob Wilson
2019 Std. Range Plus Model 3 - 134 MPG3 || 2014 BMW i3-REx - 117 MPGe, 39 MPG
JuiceBox 40 Pro (240 VAC, 40 A), KHONS portable (120-240 VAC, 12-32 A)
Retired engineer, Huntsville, AL (five times AutoPilot saved.)
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