Quote:
Originally Posted by 2000mc
quantified for big trucks by cummins a few years back
Relative Rolling Road Surface Resistance %
Concrete polished (best mpg) –12%
new baseline
Asphalt with finish coat 1%
medium coarse finish 4%
coarse aggregate 8%
Chip and Seal Blacktop (worst mpg) 33%
Road roughness can increase rolling resistance up to 20% due to energy dissipation in the tires and suspension (10% loss of mpg).
taken from p. 26 at http://cumminsengines.com/assets/pdf...whitepaper.pdf |
Your post made me think of the Cat truck spec guide. Page 10 & 13 are relevant showing how to calculate rolling resistance.
http://www.google.com/url?sa=t&rct=j...52SwvXXGuFOQLw