I have written a small javascript program that serves as a visual aid to understand the power generated by cantilever brakes. You can see the effect different cantilever geometries have on mechanical advantage and you can adjust all setup variables independently.

You can see here:
http://www.circleacycles.com/cantilevers/

with background analysis here:

http://www.circleacycles.com/cantile...i-geometry.pdf

Thoughts and suggestions are appreciated.

Regards,

Benno