"HeyBub" writes:
wrote:
This is all assuming a clean blade for the proper high co-efficient
of friction.
Dust od sap build-up on the blade can change that very quickly.

Consider what a disk brake caliper has to overcome: dirt, water, oil,
pigeons. It still does a pretty good job.


On the other hand, disc brakes are designed so they don't lock up,
this includes the materials used as well plus the modern ABS electronics.

scott