<VV> Piston rings concern

[Jim Houston]

When I assemble an aircraft engine (big Corvair!), the rings are 
staggered.  I asked a technician at Lycoming the same thing once and his 
reply was that the rings will rotate, but the times that they will all 
align are remote - and they don't stay that way...  but if you don't 
stagger them, then you can have a problem!!  As Bob says, it's not an 
issue...

Jim Houston
Tampa, FL

BobHelt at aol.com wrote:
> In a message dated 7/25/07 7:12:36 AM Pacific Daylight Time, 
> dmonasterio at megared.net.mx writes:
>
>   
>> Every time I install rings there is a concern that comes to my mind. I know 
>> how to install them and the gaps position but, how long they will retain the 
>> original position ? Do they rotate eventually ?
>>
>>     
>
> Daniel,
> As I understand it, the piston rings (except the oil ring) all tend to rotate 
> around the piston in operation because of the cross-hatching. This apparently 
> causes no problems. 
> Regards,
> Bob Helt
>
>
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