13-12-2021, 05:20 AM
(12-12-2021, 11:03 PM)Robert Leigh Wrote: On my 1928 car I have the later type coupled brake system, and also have the early '30s drums, shoes and linings. This increases the brake shoe area by 25% which means that for a given braking effect the pedal pressure will also be 25% lower, so if you are not good at pressing the pedal hard the car will stop better. On brake test in my car I can achieve 80% efficiency on dry tarmac. It is straightforward to change the earlier shoes and drums to the later type, with no other modifications.
Isn't friction independent of the area of contact?