> RT wrote:

>> IIRC the IO-360 has full wedge rings. Run it square or over-square on
>> cruise/let-down or suffer ring flutter and early ring/cylinder failure.
>>
>> Run it undersquare and you won't have any long term effects. You won't
>> have any long term.
>>
>> They are my least favourite engine (except for a GSIO-540, of course :-)
>>
>>

> Hi RT
>
> Do you mean that we should be running undersquare on descent. I am a
> little confused about "oversquare on cruise/letdown or suffer ring
> flutter". Do you mean "or you *will* suffer ring flutter"?