Wrong calculation of rolling resistance

[LBodnar]

Where did you get "touring" Pacejka data from?

That is a good question. I think I had some pirelli tire data(from a FSAE paper) but never put it into vdrift. Can you post the Genta numbers?

Sure,

Large front-wheel drive saloon car

Rolling radius Re = 287mm

# Lateral force
a0=1.6929
a1=-55.2084
a2=1271.28
a3=1601.8
a4=6.4946
a5=0.0047966
a6=-0.3875
a7=1
a8=-0.045399
a9=0.0042832
a10=0.086536
a111=-7.973
a112=-0.2231
a12=7.668
a13=45.8764
# Longitudinal force
b0=1.65
b1=-7.6118
b2=1122.6
b3=-0.00736
b4=144.82
b5=-0.076614
b6=-0.00386
b7=0.085055
b8=0.075719
b9=0.023655
b10=0.023655
# Aligning moment
c0=2.2264
c1=-3.0428
c2=-9.2284
c3=0.500088
c4=-5.56696
c5=-0.25964
c6=-0.00129724
c7=-0.358348
c8=3.74476
c9=-15.1566
c10=0.0021156
c11=0.000346
c12=0.00913952
c13=-0.244556
c14=0.100695
c15=-1.398
c16=0.44441
c17=-0.998344

:?: b9 and 10 are the same?

------------------------------------------------------------
Large rear-wheel drive sports car

Rolling radius Re1 = 310mm Re2 = 315mm

# Lateral force
a0=1.799
a1=0
a2=1688
a3=4140
a4=6.026
a5=0
a6=-0.3589
a7=1
a8=0
a9=-0.006111
a10=-0.03224
a111=0
a112=0
a12=0
a13=0
# Longitudinal force
b0=1.65
b1=0
b2=1688
b3=0
b4=229
b5=0
b6=0
b7=0
b8=-10
b9=0
b10=0
# Aligning moment
c0=2.068
c1=-6.49
c2=-21.85
c3=0.416
c4=-21.31
c5=0.02942
c6=0
c7=-1.197
c8=5.228
c9=-14.84
c10=0
c11=0
c12=-0.003736
c13=0.03891
c14=0
c15=0
c16=0.639
c17=1.693

:?: b9 and b10 are zero (no rolling resistance from Pacejka)
But he lists fo=0.013 and K=6.5E-6
Same numbers are listed for saloon as well?!

I am about to throw his book out of the window! It is full of inaccuracies!

By the way here are the Fy curves for all three. Could "touring" be a bias-ply or truck tyre? It's just too different...