RE: Re^2 RE: Disc Brake kits

["Smith, Kirby A" <kirby.a.smith@lmco.com>]

Yes, you are right, my choice of words was poor.  The swept area does not
increase with this concept, and thus the heat dissipation does not improve.
However, the friction that can be applied in a single stop is doubled, as
the disk is unlikely to overheat in that case.

kirby

> ----------
> From:
> steveb@falcon.kla-tencor.com[SMTP:steveb@falcon.kla-tencor.com]
> Sent: 	Friday, May 22, 1998 6:23 PM
> To: 	kirby.a.smith@lmco.com
> Cc: 	quattro@coimbra.ans.net
> Subject: 	Re: Re^2 RE: Disc Brake kits
> 
>  # I've wondered that myself.  In particular, if one wanted to remain with
>  # 14-inch wheels, even the G60s would not work.  Has anyone evaluated the
>  # possibility of using a second pair of standard piston assemblies on the
>  # opposite side of the rotors?  This would double the swept area and keep
> the
>  # present wheel clearance.  I would expect one would need a mounting
> bracket
> 
> ... based on my understanding of braking theory, adding a second caliper
> on the same rotor actually would not increase the swept area.  The swept
> area is the area of the rotor that is actually contacted by the brake pads
> during each revolution of the rotor.  This means that the only way to
> increase swept area would be to increase the diameter of the rotor or make
> the "hat" section smaller.  
> 
> Perhaps you could use the internal caliper technique so despised by all
> (UFO's) or mount a rotor on the inboard end of the half shafts.  Both
> techniques were used by Audi on one car or another ... perhaps you can
> adapt one of them to your car ... ;-) 
> 
> Steve Buchholz
> San Jose, CA (USA)
>