Al Gietzen wrote:

Lynn;
I think you're right on with your comments about cooling.  I was a
little surprised by the first part of this:

" Keep in mind that temperatures above 160

degrees is cutting into power output on NA engines and continuous

operation

above 220 is begging for engine damage.""

Typically piston engines run a tad more efficiently with a higher
coolant temperature as there is less energy lost to the cooling jacket;
so we might like 180 thermostat as long as there aren't any overheating
problems.  Is the rotary different?

Al

Running a thermostat is a waste of aerodynamic drag. You should run cowl
flaps instead. Unlike a car the aircraft engine is running at power levels 
where too cool is never a problem.

Paul Lamar
 
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