XPost: comp.mobile.android, misc.phone.mobile.iphone   
   From: xenolith@optusnet.com.au   
      
   On 16/5/2022 7:36 am, Andy Burnelli wrote:   
   > AMuzi wrote:   
   >   
   >> Differential thermal expansion does not require entering the plastic   
   >> zone for the entire piece.   
   >   
   > Finally someone on this newsgroup is using their brain.   
   >   
   > It's disconcerting that most people completely ignored the dozen references   
   > I provided and that they provided, in turn, a 20-second youtube from a kid   
   > in NJ which shows absolutely nothing whatsoever - and yet they think it   
   > does.   
   >   
   > They may as well claim the earth is flat in a 20 second video from a kid in   
   > NJ who _proves_ it beyond any doubt in their (strange) low-IQ brains.   
   >   
   > Anyway, Amuzi brings up an _excellent_ point that you don't likely need the   
   > 2300 degrees it takes to _begin_ melting a typical cast iron rotor.   
   >   
   > But bear in mind even the best brake fluid boils off at well under one   
   > quarter of that temperate, and that the rubber in the braking system would   
   > be marshmallows anywhere near the "zone of thermal expansion" Amuzi alludes   
   > to, and we have what appears to be a situation which requires more data.   
   >   
   > At what temperature does a rotor 'soften' is key here, I think, isn't it?   
   > Isn't that what Amuzi is alluding to?   
   >   
   > Certainly if you leave the rotors on a steel rack at a thousand degrees for   
   > ten hours (which we learned in the paper Vic Smith referenced), they will   
   > "increase" their "distortion"; so I _believe_ what Amuzi is alluding to.   
   >   
   > However, nobody here is going to claim that their rotors spent ten hours at   
   > a thousand degrees and _then_ they declared that they warped, right?   
   >   
   > The brake system components (piston gaskets, fluid lines, fluid, etc.)   
   > would be marshmallows at even the "low" temperature of a thousand degrees.   
   >   
   > In summary, I get it that people _believe_ their rotors warped, and yet,   
   > I've _never_ seen anyone who said that who actually _measured_ it, and,   
      
   You are being deliberately disingenuous here! I have told you that I   
   have *measured* warped rotors. It is very easy to prove that a rotor has   
   warped, all you need is a dial indicator with a magnetic base. You   
   measure the face and find the *low point*, mark it. Then you find the   
   *high* point, mark it and include the measurement. Use zero as the   
   reference datum for the low point. Then measure the obverse face of the   
   rotor in the same manner. If the zero reference on one side matches the   
   high side on the obverse, you have a *warped rotor*. You can do further   
   checks to ensure that something else is not causing the effect, the dial   
   indicator will serve for that purpose as well.   
      
   BTW, have you spent *any time* in an engineering shop at all?   
      
   > worse, I found a dozen experts who claim it's impossible given the   
   > temperature required is greater than the brake system can handle.   
   >   
   > If Amuzi is correct that warp (aka "thermal distortion") happens at a lower   
   > temperature than a thousand degrees for ten hours, then I'm all ears.   
      
   Irrelevant to the situation that occurs in a brake rotor. You are making   
   incorrect assumptions, bullshit assumptions in fact.   
   >   
   > Give me a fact, and I'll read it.   
      
   I have given you facts, they don't match your *belief system* so you   
   diss them out of hand.   
      
   > Does anyone have any reliable cites that back up their belief system?   
      
   I have been there, measured warped rotors. Your voodoo science doesn't   
   match the *reality* in which I live. That is a problem for you, not me.   
      
   --   
   Xeno   
      
      
   Nothing astonishes Noddy so much as common sense and plain dealing.   
          (with apologies to Ralph Waldo Emerson)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)