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*To*: Audi Quattro List <quattro@coimbra.ans.net>*Subject*: appologies*From*: Jeremy R King <kingjer@eng.auburn.edu>*Date*: Wed, 14 Feb 1996 12:44:29 -0600 (CST)*cc*: Eric Fletcher <STEADIRIC@aol.com>*Sender*: quattro-owner@coimbra.ans.net

Whoops. Looks like I'm out a million bucks. How much is that a month, eric? In all seriousness, I owe you a public appology. There's a point where joking and jabs get a little too serious and I crossed the line. The only problem I still have is that you kept saying, "do the math" and now that I've done it, all you have to say is, "do the empirical tests". I agree that I have a lot to learn still as an engineering student (that's why I always put the "student" part in there). Our fomula car project is teaching me tons on how the real world differs from the textbook - especially when it comes to fabrication of an idea. But it is also confirming that engineering calculations are very good predictors of empirical results, assuming that the model is accurate. Until you do the math to back up your empirical "results", your argument doesn't have any more validity than mine. Empirical differences can be attributed to so many variables that until you do "the math" you won't know what caused the differences. You say that the carbon rotors improved your time to 100 mph from 8 seconds to 7. How many identical runs did y'all do to come up with these difinitive empirical results? If both sets of data (carbon vs iron) were normalized, were they normalized for standard temperature and pressure, to each other, what? Did y'all record the data, use average values, and compute the effects of different atmospheric conditions, tire wear, etc? What about driver inconsistencies? Now about the flywheel arguement. The proverbial apples to oranges arguement here, eric. The flywheel and clutch ONLY HAVE TO OVERCOME ROTATIONAL INERTIA. There is no linear momentum in this equation to compare rotational inertia to. So yes, when the flywheel weight is the major part of the equation, differences in weight will make big differences in "wrap up" time. But our whole premise (me and Glen) is that the aluminum rotors are a miniscule part of the braking equation. Sure the difference is there. I'm not denying that. I will believe your arguement as soon as you prove your empirical results on paper. I can do 0-60 runs all day and empirically show that putting my change in the other pocket will make me a tenth faster. You need more than that. SHOW ME THE MATH, ERIC. Jeremy '86 VW Quantum GL5 Auburn University, Alabama, USA Hometown - Reidville, South Carolina, USA

**Follow-Ups**:**Re: appologies***From:*"Graydon D. Stuckey" <graydon@apollo.gmi.edu>

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