Rolling Resistance Data

[Viking Biker]

I was doing a little modeling and was curious if anyone knew of any rolling resistance data for various tires on the salt. Thanks

[Viking Biker]

I found in "The Racing Motorcycle" two ballpark  answers.
 
 
 For RR"lbf"="a+b/p+cV^2/p"w with p=tire pressure"lbf/in^2" and v=velocity"ft/s" and w=weight"lbf" the GoldenRod used the following coefficients a=.005 b=.15 c=.0000162
 
 Cooper for his 125cc Can-Am Used rr=".085+.255/p+2.771/10^5p"w for <102mph<rr=".255/p+5.1v^2/10^5p"w
 
 Has anybody else seen anything they would be willing to share? Thanks."

[hawkwind]

Viking biker there are many factors that influence rolling resistance coefficient ,for instance ,tyre type ( radial or bias ply) temp,inflation pressure ,material , design,  slip,velocity and load  all of these factors make it almost impossible to come up with a simple formula
 I use this method for modeling  if its of any use   f=0.01(1+V/100)
 where  f= rolling resistance coefficient
        V= speed in MPH
 cheers Gary

[Heliophile]

I have posted a discussion of rolling resistance on the "Design Topics" page of my website www.paterstreamliner.com.  I gathered up all the information I could find that seemed to be reliable, and plotted various models for comparison.  Enjoy.
Larry

[Ken Yooper]

Heliophile -

Great site - -- really great build - - expertise is evident at engineering and the build itself.

Congrats on an excellent project.

KB

[wobblywalrus]

That is a clever idea of using the bike frame and suspension along with the engine.