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Rusty,
Glad to hear its all working
well.
I've looked at some oblique ducts in K&W
and believe your first duct may just need some refining. I've tried to
draw (in blue) some suggested curves. I think part of the problem is the
blunt end of the duct opposite the intake make be causing the last 1/3 (perhaps
more) to be less effective. That back section of air in your duct
might be blocking/hindering good flow into the last 1/3 or so of the
cooler. Also, I think with as flat as the airflow is to the core, you may
need an airflow divider to force at least some of the inlet air to all parts of
the cooler. As it is - I suspect most of the airflow is going through
the first 1/2 of the cooler with lesser amounts through the back
half.
The problem I see with your suggested revision
is the losses you will encounter by having so much of the air having to make a
pretty tight 90 degree turn to go through the core. But, have not
tired a duct this oblique so don't have any real data to go
by.
FWIW
Ed
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