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

[Bill Dickerson]

They were loony and knew not what they were doing?

Who knows! They either had their reasons, or they didn't care, or it didn't
matter, or they were new and didn't know better.

And why would anyone have pulled it apart 70 years ago and reversed all of
the nuts?

I guess unless we find an old engineering book that details such
things................. 

Bill

-----Original Message-----
From: sel-bounces at lists.stationary-engine.com
[mailto:sel-bounces at lists.stationary-engine.com] On Behalf Of Steve Royster
Sent: Wednesday, April 20, 2005 9:52 PM
To: sel at lists.stationary-engine.com
Subject: Re: [SEL] Re: Pinned Rings - Problems or Not?

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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