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

[Steve Royster]

Speaking of the square nuts thread..... I recently took apart a Hercules 
cart and guess what? every single square nut was on with the roundover side 
down! and I guarantee with all the rust I encountered , it had never been 
apart before! So, who knows what those Hercules engineers were thinking? 
Steve in Asheville, N.C.

>From: Curt <curt at imc-group.com>
>Reply-To: The SEL email discussion list <sel at lists.stationary-engine.com>
>To: The SEL email discussion list <sel at lists.stationary-engine.com>
>Subject: Re: [SEL] Re: Pinned Rings - Problems or Not?
>Date: Wed, 20 Apr 2005 10:59:08 -0400
>
>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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>>
>>
>
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