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From: "Steve Brooks" <steve@tsisp.com>
Date: 2004/09/20 Mon AM 06:14:38 EDT
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Still high temperature
Al,
I am running the cores in series, and I agree that it appears to be
insufficient cooling. Since others are running the evaporator cores with no
trouble. I assume that the issue is air flow. John Slade seems to have no
trouble with his temperatures, and has the identical plane and scoop.
Actually I've added a front end to my scoop to get outside the boundary
layer, but still have high temperatures.
...
Steve,
WRT: airflow - looking at some photos of your radiator arrangement, I see a potential problem. You're asking the air coming in from the NACA scoop to turn in two directions (not counting the portion going UP to the oil cooler) - half 30-45* to the left and half 30-45* to the right. I didn't see any vanes or baffles to help steer the air. I suspect that there is a turbulent "dead" air zone at the "V" where the two cores meet.
Is there room enough to move the cores outward 2-4 inches - so that you could install a K&R shaped curved "wedge" between them, to help shape the airflow through the cores?
See attached drawing v-core.gif
Dale R.
v-core.gif
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