I have my new rad test box half built.
This time I am using the actual rad I will be using
in the airplane. It is sideways with a simple wedge shaped
duct. I will test it with and without three venetian blind type
cowl flaps.  I moved it up further from the roof of the van to be
sure I had clean horizontal air.

The opening is 5 inches high by 24 inches wide or 33% of the rad area.

My rad is a stock Howe Racing $200 all aluminum. 27 1/2 inches wide
over all. 24 inch wide core. 14 3/4  inches fore and aft core.
The core is 2.25 inches thick.

Paul Lamar

Paul,

    This is great, the testing you are doing. I wonder if it would be worth
putting some wool tufts on the outside of the test box to confirm the
ambient airflow. If you had a chase car with a camera or maybe a second test
pilot snaping pic's out the window. I thought maybe CHiPs might help on
that, but then the pictures might end up as evidence.

Keep up the great work,

John

 
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