| Re: Running IO 360 Oversquare |
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Group: aus.aviation · Group Profile
Author: RTRT Date: Aug 30, 2008 04:10
"BernieFlyer" gmail.com> wrote in message
news:rs-dnWbbUNZVYCXVnZ2dnUVZ_rjinZ2d@westnet.com.au...> Alan Peake wrote:
>>
>>
>> BernieFlyer wrote:
>>> Hi Team
>>>
>>> I have an IO 360 engine with a 3 bladed constant speed prop.
>> ........
>>
>>> I am interested in the views of those more of an engineering bent or
>>> anyone who has a well informed view on the matter.
>>>
>>> Bernie
>>
>> What does the manufacturer recommend?
>> Alan
>>
> The manufacturer (Lycoming) allows quite a large range of settings. They
> also say that "square" is a carry-over from radial engines but I guess
> before I go against all that advice to keep the engine square I was
> looking for some real world experience. Lycoming say that 2100 rpm with 24
> inches is ok (with all sorts of combinations allowable) so I doubt there
> is any short term issue. Its the long term effects of different settings
> that I am interested in.
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 :-)
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