Originally Posted by
Crash one
I would agree that 45deg is the ideal, but to cause chatter I think they would have to be close to zero. Just my opinion from a practical thinking point of view, I haven't read the theory either. Perhaps someone could explain chattering at, say, 30deg, 20deg? I can understand the oil transfer bit but not chatter.
All four were done together at the initial tear down inspection, then when the problem surfaced on #1 it was re-honed. The problem persisted so they looked at the crosshatching via a borescope and were satisfied and also said there was no "glazing" visible. Reading the attached article I see this "plateau" issue but am not really understanding it or know if it's relevant to this problem.