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Al, here is a couple of diagrams of intakes similar to
yours from a series of articles on cooling that was published some time
ago. But, may have some applicability to your situation.
According to its design parameters . Your exit
area should be greater than 115% (with flap closed - looks like you're OK
there), your length (L) of duct appears to be at least as long as the
height of your core . You duct entrance should be between 1/6 and 1/3 of
your core height which if it were the stock 4" high oil cooler means your inlet
height should be between 1/2" and 1.33" in height, I think you are OK there as
well. The only thing that I can see that would appear to be in
conflict with these design parameters would appear to be you have not inlet
stand-off and the boundary layer ingestion may be your problem.
In the Wing Installation.gif file you can see where
they are using a turning vane very much as you proposed, so I may have been more
pessimistic than correct in my previous e mail about the effectiveness of the
vane. So, with this, I would definitely say - "Try the Vane!"
ED
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