brake pad area calculation

[counter]

I want to calculate minimum pad area required for my disc brakes so that brake fade may not occur. I am calculating the same by taking the kinetic energy/4 to be absorbed by one corner (4 disc brakes), but I have a doubt that how fraction of it heat will be absorbed by pad (as substantial amount will go in disc).
Also, anybody have any idea how much will be the allowed peak temperature of the pad (I have all the properties of pad such as k, c, rho, alpha. Any ideas in right direction will be appreciated.....

[Mehul Botadra]

Just use stock callipers. They'll work wonder. Why would you wanna calculate pad area?

[Sormaz]

Originally posted by counter:
the kinetic energy/4 to be absorbed by one corner (4 disc brakes)

This isn't going to be very valid, you are going to end up with pads that are too small in the front and too large in the rear (assuming that your CG is somewhere above the ground plane)

[counter]

Originally posted by Mehul Botadra:
Just use stock callipers. They'll work wonder. Why would you wanna calculate pad area?

firstly-So far, every team had used these stock calipers in FSAE but many teams had brake fade problem and ur pad area decide how much it can resist fade.

secondly- as a engineer, every component used on our car need to be answerable to real world threats (e.g.- high temp. in this case ,judges questions etc.)

[2BWise]

There have been a lot of racecars built for other classes and series that don't have significant fade issues that are near the size and dynamic capabilities of FSAE. Research what they've run and start there.

Build a brake dyno and test it for yourself. If you can test different hardware you can easily measure temperature and torque output and have a metric to evaluate fade characteristics.

[Mikey Antonakakis]

FSAE teams have brake fade problems with stock calipers? Where? In endurance? And stock calipers from what?

[Jay Lawrence]

I don't understand how a FSAE car can get fade, they're just not that heavy or fast. If you start at standard 600cc road bike brakes and go down from there you shouldn't have issues. If you are designing the whole lot yourself (which we have done for many years and which the judges don't seem too impressed by any more) then use heat transfer formulae to determine how much heat is absorbed by the rotors and pads. To avoid fade due to fluid heating we always put Ti backing plates on our pads and have Ti pistons. To avoid fade due to gas build up between the pad and rotor, put holes in your rotors...