The Swelling Pin hole Conundrum

[Howard S. Rosen]

Hi Jim,

Impossible!!!!!! If by hole size you mean diameter, then circumference is
directly proportional to the diameter of a circle. If circumference is
increased, the diameter must also increase.

Howard S. Rosen, RPT
Boynton Beach, Florida
----------
> From: JIMRPT@aol.com
> To: pianotech@ptg.org
> Subject: Re:  The Swelling Pin hole Conundrum
> Date: Wednesday, November 19, 1997 11:07 AM
> 
> Tom;
> In a message dated 11/19/97 8:41:13 AM, you wrote:
> 
> <<"which. after great
> discussion,  Jon proved to almost everyones satisfaction, that these
holes do
> not  behave as one might expect and shrink with the introduction of
moisure
> but actually expand- the hole enlarging!">>
> 
> Tom actually there is a paradox here. With the application of moisture
the
> balance rail hole gets larger in cicumference but smaller in hole size. 
When
> the wood dries out the hole gets smaller in circumference and smaller in
hole
> size.
> So in both situations the hole gets smaller but the circumference changes
> also.  
> Go figure !  I don't have the technical explanation for this but maybe
Mr.
> Hart will shed some light on this for us.
>  Jim Bryant (FL)
>