Mike:

Uneven cylinder cooling is a big problem. It is not at all as uniform as we would like. As a general rule, the hottest part is at the 6 o'clock position where the probe is... not always, but generally. Some areas can be quite a bit cooler than others on one cylinder. That is not good. It was that research that led us to create special baffling to address this issue.

Walter


On Apr 4, 2005, at 9:03 AM, MikeEasley@aol.com wrote:


Engine Guys,
 
I know the engine doesn't cool very evenly when on the ground.  And we only measure CHT at one spot on the bottom of the cylinder.  Is it possible that some areas of our cylinders are getting much warmer, or staying much cooler than the probe is reading?  I'm assuming that, in flight, that the cylinder temp is more even in all areas due to the increased air flow.  Could baffling (good or bad) send a high amount of air to where the probe is, not necessarily cooling the entire cylinder, and make your number look good on your monitor, but really be cooking your cylinder?
 
Mike Easley
Listening and Wondering