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gentle vs. hard braking - that seems backwards... Posted by JimBlake [Email] (#141) [Profile/Gallery] (more from JimBlake) on Mon, 2 Dec 2002 13:57:47 In Reply to: Anyone read R&T TechTidbits on brake break-in?..., Mike Lynch [Profile/Gallery] , Fri, 29 Nov 2002 23:04:28 Members do not see ads below this line. - Help Keep This Site Online - Signup |
When you stop from the same initial speed... Whether you brake hard or soft, you still have to dissipate the same amount of kinetic energy. So if you brake hard, you dissipate it all in a shorter period of time. Same energy = same heat; over shorter time means more power. Therefore higher temperatures.
In fact, if you brake softly, you allow some of the kinetic energy to be dissipated by other means. Aero drag, tire & bearing friction, engine braking, etc. The extreme limit would be (like Jae) simply lifting & not using the brakes. Of course, traffic doesn't always allow you to do this.
One strategy that made sense to me was not clamping the brakes once you are stopped. The portion of the rotor that's covered up by the pads stays hotter...
Don't get me wrong, I'm not exactly disputing it. I just want to understand WHY? The statement that longer gentler stops have more energy, just isn't true. It seems to be based on a misunderstanding of what's the difference between power & energy.
So there must be a different explanation.
posted by 12.155.9...
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