I tried a thermostat twice and could not get it to cool properly on the
ground in either case, so gave up and have flow 200 hours with no thermostat
and no problem.

Ed Anderson
------------------

===>  Was it OK in the air without the thermostat?  The way it looks to me,
if you have a properly working radiator system, a thermostat is a good
thing.  Since you have no electric fans, your radiators aren't working
"properly" on the ground, so removing the thermostat could certainly help.  

On the other hand, the fact that removing it helps your ground cooling
proves that it's better to do without the thermostat if possible.  I also
wonder if there would be less chance of pump cavitation at higher RPM's
without the restriction of the thermostat.  

Have you ever had a problem with temps being too cool?  How about when
descending from freezing altitudes at low power?  

Still leaning toward trying it with the thermostat first.  I'll have one or
two electric fans for ground ops.  

Thanks for the comments.
Rusty