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Subject:Re: fuel pres.
From:David Beierl
Date:Sun, 21 Jan 2001 00:09:40 -0500
At 11:28 PM 1/20/2001, Aaron Gibson wrote:
>Specific Gravity of the fluid would determine the design of the guage.
>Just my opinion!

Actually no.  A Bourdon tube is a flattened metal tube curved almost into a
circle.  When pressure is applied it uncurls (a little) which moves the
free end of the tube.  That motion is magnified by the linkage to the pointer.

In point of fact the working fluid may never get to the gauge itself --
depends on pressure vs length and diameter of the feed line vs volume of
the Bourdon tube.

david

David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"