I guess we’ve had this discussion before but to me
it still seems like a grey area.
The limit has to do with temperature, time, and limiting
component.
At typical cruise conditions I have coolant temps of
160-170F and oil temps about 20 degrees higher. Short term climb out (1000
– 2000’) I see oil getting up 215 -220 and coolant around 200. If
I continue climb, I need to reduce power to keep them at those levels; which
means climb rates of 500-700 FPM with OAT of 65F, and maybe a bit less if OAT
is higher. I don’t like being limited to that climb rate when I
have power for considerably more; but the real question is: Is that temp level
an issue if sustained for 10-15 minutes? And what is it affecting?
I expect to make some modification to improve airflow
through the cooler, just deciding if it is urgent or if it can wait for another
10 -20 hrs of flying. Anytime I go east from my airport I have to climb from
1400’ to about 7000’ to clear high terrain.
Thanks,
Al