Once the piston position is correlated to the pressure gage in the
cockpit, you will always know its location.  I am thinking of setting
up the floating piston to maintain coolant pressure at 20 psi and
using a 26psi cap on the swirl pot as a safety.  Opinions?   Jerry

Why plastic? Why not aluminum? You are asking for it with plastic.
Do you really want to fly around with a critical plastic part in your
airplane subject to 250 degrees F and 26 psi.
Plastic is cheap. That is its only advantage.

Paul Lamar
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Paul, sorry to burst that bubble, but the RIGHT type plastic
is not cheap.


Regards David Gaze

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