Russell Kent wrote:

The fuel leaving the fuel rail via the pressure regulator is going to be the
warmest.  It mixes with incoming fuel in the sump tank, lowering the temperature,
making it harder to get rid of (remember that a cooling system's effectiveness is
a function of the delta T).  The most effective would probably a small fuel cooler
between the pressure regulator and the sump.  Of course the additional components
and interconnections are detrimental to reliability.

Chrissi replied:

Perhaps machining a replacement for the gascolator cup with fins and placing in appropriat
airstream may do dual duty.

I'm just a dumb software guy, but I thought the gascolator was between the sump and the high
pressure fuel pump(s).  For best cooling, one would want the fuel cooling device to be between
the pressure relief valve on the fuel rail and the sump.

Russell Kent

Dear Russell,
Hey, you're no dummy, thats my job! but I was just looking for all the free cooling we can get,
granted the difference may not be as high. on canards they want you to put the cup dangling into
the stream coming in the NACA.. as much for accessability.
....Chrissi

So that's why Perry's sump tank is blocking the flow to his rad :)

Paul Lamar

It's in that location so it is low enough that the main tank drains to
it by gravity. Accessibilty and airflow cooling are side benefits.

--
Perry Mick
Custom Composite Props
mick@bridgingworlds.com
http://www.ductedfan.com

 
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