Mike Wills wrote:

Paul Wrote:

An airplane can use such a low drag radiator if it is mounted at an
acute angle to the general airflow. In that case the air must turn
almost 90 degrees to go through the core. This will work and is
working very well in Jim Mosur's and other people's airplanes
but we need to do some more work on the duct to even the flow
through the rads.

Paul Lamar

Paul,

snip..

 Who are the "others" using a core requiring a 90 degree turn that are
successfully flying the engine? The only other example that I'm aware of is
Tracy's stock Mazda oil cooler installation. And even with the addition of
his oil pan coolant loop his oil cooler installation doesnt seem to work as
well as Jim's and Ed's who are using the same cooler oriented perpendicular
to the airflow. Feel free to correct me but Jim and Ed are the only guys
Ive ever heard of with too much oil cooler capacity.

 Believe me Paul, I want to believe cause it sure would make my
installation easier but prove it to me by pointing me to a successfully
flying example.

Mike Wills

Here is a picture of Chuck Harbert's rad under his engine.
One of three perhaps :-) One for each rotor :-) 

I'll be out at the hangar this weekend if you want to drop by
and take over R&D on the proper duct shape. I will loan you my
rad and my AC squirrel cage blower. I could use some help.

Paul Lamar
 
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