glcasey
Joined: 01 Jul 2007
Posts: 23
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 Posted: Thu Oct 11, 2007 5:05 am Post subject: Engines-List Digest: 5 Msgs - 10/10/07 |
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I'm not a certified engine expert (although I am probably certifiable
in other catagories... , but in my experience "ring flutter" is
something the engine builder will use to explain broken rings found
after a teardown. The owner will then nod and pay the bill.
Presumably the the ring starts to vibrate away from the cylinder wall
in waves. Some will say it can happen at very high piston speeds or
with a cylinder that is badly worn - or if the cylinder pressure is
rapidly changing as in a detonation event. Regardless, it is the
result of something bad, not the cause of it. How someone can
diagnose "ring flutter" without having torn down the engine I don't
know. I certainly wouldn't lose any sleep over it, but at the same
time keeping the timing correct will maintain a margin against
detonation. Most naturally-aspirated aircraft engines have a robust
margin anyway, except when overheating while running on one mag.
Gary Casey
| Quote: |
Time: 04:38:19 AM PST US
From: Fredrick Kerfoot <fredkt46(at)hotmail.com>
Subject: Ring Flutter?
What is piston "Ring Flutter"?? I have an IO360. Just how
concerned shoul
d I be?
Fred K
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Gary Casey |
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