On Sun, 22 Oct 2017 20:51:15 -0700, Jeff Liebermann
wrote:

On Mon, 23 Oct 2017 07:02:08 +0700, John B.
wrote:

But re disc brake cooling F1 car brakes appear to work with the discs
red hot. In the 1,000 degree (F) range. And they use Carbon Fiber
discs too :-) And everyone knows that CF is better.

"Thermal Conductivity of Carbon Fiber, and other Carbon Based
Materials"
http://www.christinedemerchant.com/carbon_characteristics_heat_conductivity.html
"So...Is Carbon Fiber a good heat conductor?
As usual the answer is "it depends." The short answer is NO
not when regular carbon fiber is made up in regular epoxy
and expected to conduct heat across the thickness. IF a
highly carbonized pan fiber with graphite or diamond added,
is measured for heat transmission in the length of the fiber
it is very good and can rival and exceed copper."

On the other hand, they seem to work pretty well :-)
See https://www.youtube.com/watch?v=h5JcHAEmIYM
for a visual indication of heat dissipation. :-)


--
Cheers,

John B.