Mailing List flyrotary@lancaironline.net Message #5059
From: Russell Duffy <13brv3@bellsouth.net>
Subject: EWP check valve test, more plumbing options
Date: Wed, 31 Dec 2003 20:20:11 -0600
To: Flyrotary List <flyrotary@lancaironline.net>
Message
Greetings,
 
I promise this will be the last time I start an EWP topic this year (boo, hiss, sorry) :-)
 
First, at the suggestion of Todd, I did a crude flow test of the one way valves that I recently received.  Unfortunately, the news is not good.  In my extremely crude test, the pump flowed about 20 gpm with no valve.  With the valve, it was about 6 gpm.  Aside from the overall restriction, the ball in the valve started vibrating, and caused the flow be reduced even further.  All in all, a pretty poor showing.
 
Now that the valves are out of the picture, I'm looking at plumbing options again.  Attached is a drawing of the parallel arrangement, without the check valves.  If one pump was off, it would be possible to get reverse flow through it, but the water would have to go through the Meziere fitting, hose, pump, hose, one of the cores, and more hose to get back in the loop.  This is clearly a better situation (from a standpoint of reverse flow) than having the two pumps joined with a Tee at their inlets, and outlets.  Would anyone care to guess if this would positively flow water through the engine when one pump was off?  
 
Next question, is anyone running their cores in series (I think I heard Tracy groan), or is everyone running parallel? 
 
Happy New Year!
Rusty (Leon's got us beat)
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