Quote:
Originally Posted by oldtamiyaphile
If revving with the clutch dragging created more friction, the car would move. You cannot create more heat in the clutch disc without more friction, and more friction would cause the the car to move, especially as friction comes first, heat is generated from friction.
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Heat is not generated by friction alone, it is generated by friction times speed-squared. So if I have a 2000 RPM difference in speed of the clutch plates, there will be more heat generated in the clutch than if I had only an 800 RPM difference (6.25 times as much in fact). Consider two rubber blocks against each other, and you try to move one relative to the other, and you can't because the friction is too high. Lots of friction, but no relative speed, so no heat at all.