Do the math on this 3866Motorhead Lawyer It's entirely possible if it's an old vehicle with old tires that the cf might be lower than you'd think. I've been chasing my tail with...
Alan Baker
Huh? Maybe you'd care to tell us how; unless you're referring to the fact that the truck was sliding in a straight line.
I've studied it quite a bit as well.
Well, it might be; but it's not likely. The coefficient of friction of rubber sliding on concrete is not a constant. It varies most of all with the compound of the rubber *as well as* the surface texture of the concrete, the temperature, and to a lesser extent, the ambient humidity. I know that professionals such as crash investigators use a figure right around that, but they will admit that it doesn't take into account the other factors I've mentioned. It is a rough approximation for average calculations.
As I will continue to disagree. You need to do more research so you can explain why a car without ground effects can generate over 1.0 g when its tires can only generate 0.8 g. Further, why the same car with different tires will generate different lateral g forces.
Guess you're right. But I'm guessing both parts of this statement have some room for imprecision.
If I could lay hands (electrons, actually) on some G Analyst plots I have, I could tell you what kind of cf to use, but I'm not sure where they are at the moment and, at any rate, they're for an Audi 4000 Quattro with V-rated Contis on it. If I had to guess for the average pickup truck sliding on significantly harder compound tires, I'd have to say the cf might be closer to .4 or .5 g. This would also produce a reasonably believable speed from which it started to slide, don't you think? -- C.R. Krieger (Been in motorsports too long ...)
