Re: [ST] A different brake fluid question

["Rod Brown" <rodneybrown@xxxxxxxxxxxxxxxx>]

Steve,
I here what you say, BUT you are making an assumption that the amount of
expansion is "significant."  I'm not sure when you already have SS lines
that the assumption is valid.  Getting that air bubble out of the cross over
may far outweigh the expansion, IF there is a trapped air bubble.
Rod
> The effect can happen and is due to "hoop" stress.  Hoop stress is that
> which splits a tube long-ways.  A large tube has higher hoop stress than
> a small diameter tube because of the larger inside surface area.  That's
> why 6" sch 40 has thicker walls than 1/2" sch 40.
>
> Higher hoop stress means great tube expansion for the same internal
> pressure.  A second hose means twice the expansion of one hose at any
> pressure.  Since the caliper pistons still need, say, 800 psi for 1g
> deceleration, a second hose doubles the system expansion for that same
> 800 psi (if one hose stretches 2% at 800 psi and needs 2% more fluid,
> then 2 at 800 will stretch 4%).
>


     *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *
      The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
          http://www.TriumphNet.com/st/lilley for more info
   http://www.TriumphNet.com/st for ST, RS and Mailing List info

=-=-=-= Next Message =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=