Ah Yes, Abd; Another one comes to mine. How about bypass caps. Lou > Subject: Re: [DC] Calculating thermal dissipation of external plane > heat s ink area > > At 08:02 AM 11/17/99 -0800, Scott Decker wrote: > >I would like to share > >a comment I heard a looong time ago regarding vehicle brakes. One of the > >guys that worked for my father said, "Why would you turn the drums or > smooth > >the surface of those brake drums and disks? With all those deep scores > and > >valleys, look at all the extra surface area you have for friction"... > With > >that being said, sometimes it's all from a point of view... BTW, he was > >kidding. > > Brakes are turned when one installs new pads because the new pads do not > match the scores in the drum or disk. It *might,* in fact, be somewhat > more > effective if the mating surfaces were matching but not "flat," but that > would be difficult to create by turning.... > > Back when I had plenty of kids and little money, and I did my own brakes, > I > did not turn the drums; I just installed new brake pads. My theory was > that > the drums would quickly wear the pads to match, and vice-versa, and the > brakes, in fact, did work as I would have expected. That is, there was a > minor loss of braking power when the pads were new, which quickly > returned. > Never had a problem. > > The reason a shop won't do this may have more to do with legal and > liability issues than with safety per se. If there is a slight loss of > braking power, and then there is an accident, the brake shop could be > blamed even if the loss of braking power was basically irrelevant to the > accident. How could the matter be proven one way or another? So if the > drums are turned, the shop is safe. Besides, they get paid for it. > > Obviously, there may be other issues as well, not so easy to predict from > my desk.... > > [log in to unmask] > Abdulrahman Lomax > P.O. Box 690 > El Verano, CA 95433 >