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Re: Ground Friction and Resistance Index

Posted: Fri Jun 08, 2012 6:00 pm
by 2StrokeLove
richy34 wrote:you really love 2 strokes?



wrong topic, not for question... but yes i love why?

Re: Ground Friction and Resistance Index

Posted: Tue Jun 12, 2012 7:53 am
by DJ99X
Here are two tiles I used for Budds Creek

friction 1.05 0
friction 0.6 0.1
friction 1.05 0.6
friction 1.2 15
roll_resist 20 50 0


friction 1.05 0
friction 0.8 0.1
friction 1.0 0.6
friction 1.3 12
roll_resist 20 50 0

Re: Ground Friction and Resistance Index

Posted: Tue Jun 12, 2012 8:24 am
by pulse
DJ99X wrote:Here are two tiles I used for Budds Creek

friction 1.05 0
friction 0.6 0.1
friction 1.05 0.6
friction 1.2 15
roll_resist 20 50 0


friction 1.05 0
friction 0.8 0.1
friction 1.0 0.6
friction 1.3 12
roll_resist 20 50 0


thanks

Re: Ground Friction and Resistance Index

Posted: Thu Aug 09, 2012 2:31 pm
by haggqvist
Here's the traction I used on Southwick:

friction 0.25 0
friction 0.58 0.5
friction 1.02 2.5
friction 1.07 7
friction 1.13 60
roll_resist 2 50 0
roll_resist 60 90 30
roll_resist 80 105 60

Re: Ground Friction and Resistance Index

Posted: Fri Aug 10, 2012 10:33 am
by vmaki
haggqvist wrote:Here's the traction I used on Southwick:

friction 0.25 0
friction 0.58 0.5
friction 1.02 2.5
friction 1.07 7
friction 1.13 60
roll_resist 2 50 0
roll_resist 60 90 30
roll_resist 80 105 60


Thank you kind sir.

Re: Ground Friction and Resistance Index

Posted: Fri Aug 10, 2012 9:37 pm
by rafagas
Here are the two tiles I used at Alcarras.

Main track:

friction 1.15 0
friction 1.42 0.15
friction 1.35 2.5
friction 1.25 4
friction 1.13 38
friction 1.22 65
roll_resist 5.0 5.0 10.0


Concrete:

friction 1.15 0
friction 1.32 0.15
friction 1.25 2.5
friction 1.20 4
friction 1.08 38
friction 1.20 65
roll_resist 5.0 5.0 10.0

Re: Ground Friction and Resistance Index

Posted: Tue Aug 14, 2012 3:37 am
by jlv
Most materials have fairly high static friction. You guys want the coefficient to be pretty high at 0 slip, then drop off as the static friction breaks, then raise again as viscous friction takes over. Having the lowest friction coefficient at slip speed 0 only makes sense for an air hockey table.

Even ice has a higher static coefficient:

Code: Select all

Surfaces                    µ (static) µ (kinetic)
Steel on steel              0.74       0.57
Glass on glass              0.94       0.40
Metal on Metal (lubricated) 0.15       0.06
Ice on ice                  0.10       0.03
Teflon on Teflon            0.04       0.04
Tire on concrete            1.00       0.80
Tire on wet road            0.60       0.40
Tire on snow                0.30       0.20

Re: Ground Friction and Resistance Index

Posted: Fri Aug 24, 2012 7:30 pm
by mxsisboss
Has anyone got a really boggy kinda traction like for a wet track so a bit of a greasy feel combined with the bike slightly bogging?

Re: Ground Friction and Resistance Index

Posted: Fri Aug 24, 2012 7:30 pm
by mxsisboss
DP Kinda like wet sand at the beach.

Re: Ground Friction and Resistance Index

Posted: Fri Sep 28, 2012 5:25 pm
by DJD
haggqvist wrote:Here's the traction I used on Southwick:

friction 0.25 0
friction 0.58 0.5
friction 1.02 2.5
friction 1.07 7
friction 1.13 60
roll_resist 2 50 0
roll_resist 60 90 30
roll_resist 80 105 60


Could you post the settings you use for Lommel? Or are they similar to southwick?

Re: Ground Friction and Resistance Index

Posted: Fri Sep 28, 2012 10:16 pm
by haggqvist
Lommel traction:
friction 0.35 0
friction 1.04 0.2
friction 0.65 2.5
friction 1.08 7
friction 1.13 60
roll_resist 40 95 0
roll_resist 75 115 30
roll_resist 95 135 60

I just noticed that there's a typo in the first roll_resist line of the Southwick traction; it was supposed to be: roll_resist 20 50 0.

Re: Ground Friction and Resistance Index

Posted: Fri Sep 28, 2012 10:27 pm
by DJD
Thank you.

Re: Ground Friction and Resistance Index

Posted: Mon Oct 01, 2012 2:25 am
by 137
Does anybody of a good muddy traction?

Re: Ground Friction and Resistance Index

Posted: Tue Oct 02, 2012 11:29 pm
by Shadow
137 wrote:Does anybody of a good muddy traction?


Here's the one from Blackhawk Hollow.

Code: Select all

friction 0.85 3.0
friction 0.55 7.0
friction 0.69 22.0
friction 0.85 40.0
roll_resist 0.15 0.10 25.0
roll_resist 35.0 75.0 50.0


And the one from County Fair MX.

Code: Select all

friction 1.0 0.0
friction 0.85 8.0
friction 0.85 22.0
friction 0.99500 70.0
roll_resist 15 20 25
roll_resist 25 75 70
roll_resist 25 95 150


Either of them good enough?

Re: Ground Friction and Resistance Index

Posted: Wed Oct 03, 2012 7:46 pm
by 137
Thanks Shadows, BlackHawk is really good.