"Ray Richardson Jr." wrote:

Dear Paul and rotary friends,

We have found and solved the cooling problem,

The diverter lip on the top of our inlet was tumbling the
air flow coming down the slope of the cowl from the prop
and spinner. We removed the upper diverter lip so the
air coming down that slope now enters the opening
instead of the tumbled air blocking the incoming air.

How did we finally find the problem, as the cooling
was working better on the ground and much better
with the 2 blade wood prop?

We visual inspected all the BUGS splattered on the
upper lip and noticed the bug count was 10 times greater
than the total bug count inside the cowling. Finally a good
use for Wisconsin bugs.
The 3 blade MT also must be more efficient at the inner radius,
thus the more airflow coming down the slope to be tumbled.

Flying yerterday showed  water temperature was 180 degrees with
OAT of 86 deg. Today water temps. are 173 degrees, during
2 hours of flight including 12 take-off and landings.
Present cruse speed shows 180 MPH at 75% power.
No nose wheel pants no leg fairing, large spinner gap, ect.
Beautification comes after functionality.

Our oil temperature still go to 200 degs F. So we are not done yet,
but we have proved the radiator location with slowed air does work
well. I will report as the improvements continues.

Thanks

Ray Richardson Jr.

 
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