On Mon, 6 Oct 2008 11:17:00 -0700 (PDT), Vernon
wrote:

On Oct 6, 12:54*pm, Bruce L. Bergman
snip
* * -- Bruce --

Bruce, that was incredibly helpful. Thanks. Since "it can't be
single cylinder and two stage at the same time" then I stand corrected
about it being one or the other. The data plate mentions so many cfm
at 175psi. The cylinder does have a secondary "protrusion". Maybe
this is the second stage piston. I was confused because it is so much
smaller.

V
The second stage is smaller because the volume was reduced in the
first stage.

Pete Keillor