ORIGINAL: Pete S-RCU
My SJ 1200-18 has started over temping at full throttle.
I'm running it on a test stand, so it has all the air it needs.
Runs up to 159k and the temp goes over 800C.
Then ecu throttles it back to 140k and it does the same thing.
I know bad bearings can cause drag and high temps.
I had new bearings put in two tears ago, it only has seven flights on since.
Brgs seem ok, it continues to spin if you spin it by hand.
Can ceramic bearings rust?
I thought they had stainless steel races, and the ceramic balls won't rust.
What else can cause high temps?