Sent: Wednesday, December 31, 2003 9:20
PM
Subject: [FlyRotary] EWP check valve
test, more plumbing options
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)
Rusty, most of the folks I know are running their
cores in series. Tracy is the only one that I am sure of that actually
has his working in parallel. Mine were in series from the start as it
simplified my plumbing.
Ed Anderson