Originally Posted by
burgy240
you aren't getting any extra swept area
well that didn't take long for me to chime in....
This is wrong. Swept area is the area of the disk that touches the pad while rotating. That is, the area of a ring. = Pi * (R1^2 - R2^2), where R1 is the rotor diameter, and R2 is the rotor diameter minus the pad width or R1-pad. Make rotor bigger => make swept area bigger.