[SEL] Re: Pinned Rings - Problems or Not?

[Curt]

Arnie,
You've not burst my bubble :-)
Just threw it out there to see what lively conversation might come of it.
Recall the installation direction for square nuts thread? That was fun :-)
Curt
P.S. I might not be wrong. How are we to guess what the engineers at 
Hercules were thinking a 100 years ago?
P.P.S. I cannot recall....does the top ring on the smallest Herc sweep 
over the ignitor hole at TDC? Might that be the reason for pinning?


Arnie Fero wrote:

>Hi Curt,
>
>Sorry to burst your bubble bro.  I don't think the angled ends were
>anything like universal on pinned rings.  The Robertsonville shows that
>configuration, but the Bessemer has a semi-circular notch in the ends of
>what are otherwise butt-end rings.  According to Craig that's the normal
>configuration.
>
>See ya,  Arnie
>
>PS - one of the great tragedies of life is the murder of a beautiful
>     theory by a gang of brutal facts.  8-))
>
>Arnie Fero
>Pittsburgh, PA
>fero_ah at city-net.com
>
>On Tue, 19 Apr 2005, Curt wrote:
>
>  
>
>>After digesting what both of you have written so well, you have helped
>>me answered a question I have had for a long time. That is, why did the
>>engine manufactures make the ring gaps with an approx. 45° angle instead
>>of butt ends? Bearing in mind what you have both written, to solve the
>>strange wear pattern that a pinned ring in conjunction with a butt end
>>gap would create, the solution was to make the gap on a 45°. This
>>assured the ring was wiping completely around the cylinder and would not
>>leave an unworn ridge down the length of the cylinder. Seems kind of
>>obvious now, but until I digested both of your points I had never put
>>the pieces together enough to realize that one was a function of the other.
>>    
>>
>
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>  
>