Blake Lewis wrote:
I like David's constant pressure design the best for an inverted
system. I'm not sure why the design was dropped so quickly on the
list.
    I have been trying to find a way around Aubrey's objection to the
constant "high" pressure when the engine is at rest.

-----------------
I am wondering if this 'o-ring' shift is a real problem with expected
pressures. Let's take a case where you have 10psig on the pressure  can.

The o-ring is somewhat less than .093" Diameter, therefore at  10#pressure at
shut-down, the force trying to move the o-ring in from it's running  position
is 1"x 0.093" x 10(3/in^2) = 0.93# (on each linear inch of o-ring. The
o-ring is compressed between two surfaces, so the actual area  available for
the fluid to act on is less than .093 (.06?) The question: is .6-. 9# force
enough to move the o-ring back?

Bill Schertz
KIS Cruiser # 4045

I was wondering the same thing Bill.  I am glad l you applied science/
engineering to the issue.  Jerry (who, every day learns to appreciate
more  the uselessness of his fine arts... duh, education)


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