http://home.scarlet.be/~be067749/58/
would be interesting to hear what the experienced full size setup guys things of this.
RC car Setup guide
Started by
MatsNorway
, Dec 22 2011 12:16
5 replies to this topic
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#2
Requin
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Posted 28 December 2011 - 17:52
Bookmarked!
I would suggest you read Race Car Vehicle Dynamics by Milliken in order to get an idea of full-size car theory.
I would suggest you read Race Car Vehicle Dynamics by Milliken in order to get an idea of full-size car theory.
#3
MatsNorway
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Posted 29 December 2011 - 11:56
Im not huge on reading. I prefer videos and models.
Any thoughts about above mentioned?
http://www.google.no.../...um=1&itbs=1
Any thoughts about above mentioned?
http://www.google.no.../...um=1&itbs=1
#4
Greg Locock
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Posted 31 December 2011 - 23:34
So far as the tire graph goes it has at least one error, but does illustrate the basic principle well enough. You do get a tiny bit of lateral grip at Fz=0. A Pacejka tire model has the same error.
The degree of curvature of that line is very helpful for predicting limit handling plow/spin, in fact it is major component of the MMM analysis I was talking about in another thread. I was working on a car that had limit plow on one tire, and limit spin on another, in braking in turn and throttle off in turn. In the linear range the tires were very similar. It turned out that the good tire had a sharper roll off at high Fz, so it saturated and allowed the front end to break away. The bad tire was more linear and stopped the front from breaking away, so the rear did instead.
The degree of curvature of that line is very helpful for predicting limit handling plow/spin, in fact it is major component of the MMM analysis I was talking about in another thread. I was working on a car that had limit plow on one tire, and limit spin on another, in braking in turn and throttle off in turn. In the linear range the tires were very similar. It turned out that the good tire had a sharper roll off at high Fz, so it saturated and allowed the front end to break away. The bad tire was more linear and stopped the front from breaking away, so the rear did instead.
#5
MatsNorway
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Posted 01 January 2012 - 10:37
Very good. at first tought you would think the one with milder cut of (if i understood this correctly) would be of most interest. considering it being more predicatable looking on a graph.
did you guys try to alter the setup with the other tires? say.. more rear camber.
did you guys try to alter the setup with the other tires? say.. more rear camber.
#6
Greg Locock
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Posted 01 January 2012 - 11:06
Nice try... we recommended different tire pressures front and rear. By 2psi. Which is a bit scary if you think about it.did you guys try to alter the setup with the other tires? say.. more rear camber.
