Brake Calculation Problem

[Ajay]

hey guys can u jst chk out n teel me if anythng is wrong

in case of double piston caliper
F=Pressure*Area of caliper piston*2

and
rotor output force=2*Coeff.of fric. *Clamping force


n jst 1 more query
AT the rear we need lesser force so we achieve this by choosing lesser bore caliper n larger dia mc ( as compare dto front discs)
or is it handled by the balance bar.

[Ajay]

hey guys can u jst chk out n teel me if anythng is wrong

in case of double piston caliper
F=Pressure*Area of caliper piston*2

and
rotor output force=2*Coeff.of fric. *Clamping force


n jst 1 more query
AT the rear we need lesser force so we achieve this by choosing lesser bore caliper n larger dia mc ( as compare dto front discs)
or is it handled by the balance bar.

[murpia]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Ajay:
AT the rear we need lesser force so we achieve this by choosing lesser bore caliper n larger dia mc ( as compare dto front discs)
or is it handled by the balance bar. </div></BLOCKQUOTE>

Either hydraulic solution works. A mechanical balance bar is better structurally if it applies similar pedal force to each master cylinder, so use the hydraulic ratio to do the bulk of the brake balance split and the balance bar to fine tune.
Regards, Ian

[vandit]

what do u mean by clamping force....i didnt understood

[RonBurgundy01]

Ajay,

It depends on the layout of the caliper.

If it is an opposed caliper then you only include 1 piston in the calculation.

If using a twin piston caliper where the pistons are on the same side (ie RGV 250) then you include both pistons. Just be careful they are not different sizes.

Everything works on the ratio of areas between piston and master cylinder size. Ask a teacher or faculty advisor if you have any more questions on it.

As for your lesser force in the rear, it has been covered by murpia pretty well.

Good luck

Matt