Theo is on the money. Pressure is, for all practical purposes, equal
everywhere in
the brake system at all times. BTW, the name of the field that deals with this
subject matter is "hydrostatics" not "fluid dynamics". Fluid dynamics deals
with
situations where fluid flow causes pressure drops and other effects to occur in
the
fluid. In a brake system, flow of the brake fluid and its effects are
negligible.
brake fluid does flow, but at a low rate relative to the size of brake lines
orifices etc. Everything in a brake system is pretty much static, thus
hydrostatics should be used.
Mark Rudnicki
Theo Smit wrote:
> Your math is impeccable, as usual, but you should specify _which_ piston needs
> to be large to move the slave a lot. Be careful, now...
>
> > -----Original Message-----
> > From: DrMayf@aol.com [SMTP:DrMayf@aol.com]
> > Sent: Wednesday, October 21, 1998 1:39 PM
> > To: rpalmer@ames.ucsd.edu; Jay_Laifman@countrywide.com;
> > tigers@autox.team.net
> > Subject: Re: Stopping Power
> >
> > Ain't so! If the force remains constant and the area gets bigger, pressure
> > drops.
> >
> > ex: F = p x a let F = 10, a = 2, then p = 10 / 2 = 5
> > now let F = 10, a = 4, then p = 10 / 4 = 2.5
> >
> > Smaller piston area equals higher piston pressure for a given force. You
>use a
> > large piston when the slave needs to move a lot.
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