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Message
Rusty (I miss Todd
<g>)
Gee
Rusty, you've made me blush :-)
I've been back for a few days, but needed a few days to
sober up after all the post-exam celebration. I've been trying to keep up with
all the recent postings, so I've read some of the discussion on your pump
location.
I installed mine after the rads and recommend it as well,
due to one major factor that hasn't been mentioned. These pumps are plastic and
while their max temp limits are above our operating range, prudence would
dictate locating them on the cool side of things. Other factors that I
considered as well were the pressure drop through the engine as you'd already
mentioned. Another is that the pump must be located at the lowest point in the
system. Due to my plumbing arrangement, which allows the shortest, straightest
runs of 1 1/4" hose possible to minimize internal resistance, this also required
placing it after the rads.
As for your idea of one for each rad, I kinda like it. It
would certainly simplify the issue of plumbing in parallel with minimum weight
increase. I suspect that in your case, you will be doing minimum hi-altitude
cruising, so for must of your playing.. err, flying you will be producing enough
horsepower to require flow through both coolers, requiring the operation of both
pumps. In any failure mode of a single pump, I'm certain that you will only
require enough HP to maintain level flight, which a single rad should easily
provide.
I don't think it would be a good choice for my goals ( I
have another idea cooking away), but it would certainly worth trying on yours.
Go ahead, you know you want to...:-)
Ps.
Can you send a pic of the check valves that you plan to use.
S. Todd Bartrim
Turbo 13B RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm
"Whatever you vividly imagine, Ardently desire, Sincerely believe in,
Enthusiastically act upon, Must inevitably come to pass".
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