"Boy! =
First there is no correlation between pedal travel and
pressure to the rotor. None what ever. Pedal travel in
its simplest form determines how FAST the caliper
can apply force to the rotor."
Tom based on the above and your later comments
were you trying to say:
......pedal travel serves to take up the clearances
prior to the pad/shoe contacting the rotor/drum...
If so then I think we could agree. However what you did say was:
......."there is no correlation between pedal travel and
pressure to the rotor. None what ever.............
Of course there is a correlation. Diameter of the piston
determines the travel that will be required to move a
volumne of liquid........the volumne of liquid required to
move the caliper/wheel cylinder enough to take up the
clearance between the friction material and the drum/rotor.
The ratio of the area of the master cylinder/area of the
caliper or wheel cylinder determines the mechanical
advantage.
Therefore pedal travel and pressure to the rotor
are very closely related.
Also had you included an item:
5. Area of the master caliper piston
Then one could see some acknowledgement of the
impact of the ratio of the areas of the pistons.
Please clarify. Just trying to understand your
comments.
Regards
Gary Zingle
1973 GMC 26 foot
First there is no correlation between pedal travel and
pressure to the rotor. None what ever. Pedal travel in
its simplest form determines how FAST the caliper
can apply force to the rotor."
Tom based on the above and your later comments
were you trying to say:
......pedal travel serves to take up the clearances
prior to the pad/shoe contacting the rotor/drum...
If so then I think we could agree. However what you did say was:
......."there is no correlation between pedal travel and
pressure to the rotor. None what ever.............
Of course there is a correlation. Diameter of the piston
determines the travel that will be required to move a
volumne of liquid........the volumne of liquid required to
move the caliper/wheel cylinder enough to take up the
clearance between the friction material and the drum/rotor.
The ratio of the area of the master cylinder/area of the
caliper or wheel cylinder determines the mechanical
advantage.
Therefore pedal travel and pressure to the rotor
are very closely related.
Also had you included an item:
5. Area of the master caliper piston
Then one could see some acknowledgement of the
impact of the ratio of the areas of the pistons.
Please clarify. Just trying to understand your
comments.
Regards
Gary Zingle
1973 GMC 26 foot
